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annotate sencrypt.c @ 0:73af139d1a94

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Initial revision
author Guido Berhoerster <guido+sencrypt@berhoerster.name>
date Tue, 28 Jan 2014 19:23:16 +0100
parents
children f230c550e261
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rev   line source
0
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
1 /*
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
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2 * Copyright (C) 2011 Guido Berhoerster <guido+sencrypt@berhoerster.name>
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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3 *
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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4 * Permission is hereby granted, free of charge, to any person obtaining
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
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5 * a copy of this software and associated documentation files (the
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
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6 * "Software"), to deal in the Software without restriction, including
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
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7 * without limitation the rights to use, copy, modify, merge, publish,
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
8 * distribute, sublicense, and/or sell copies of the Software, and to
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
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9 * permit persons to whom the Software is furnished to do so, subject to
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
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10 * the following conditions:
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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11 *
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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12 * The above copyright notice and this permission notice shall be included
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
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13 * in all copies or substantial portions of the Software.
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
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14 *
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
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16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
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17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
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18 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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19 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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20 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
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21 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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22 */
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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23
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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24 #define _XOPEN_SOURCE 600
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25
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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26 #include <stdio.h>
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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27 #include <string.h>
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28 #include <stdint.h>
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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29 #include <stdbool.h>
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30 #include <unistd.h>
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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31 #include <limits.h>
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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32 #include <libgen.h>
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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33 #include <arpa/inet.h>
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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34 #include <sys/stat.h>
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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35 #include <openssl/conf.h>
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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36 #include <openssl/rand.h>
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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37 #include <openssl/evp.h>
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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38 #include <openssl/err.h>
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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39
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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40 #ifdef HAVE_ERR_H
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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41 #include <err.h>
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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42 #else
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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43 #include "err.h"
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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44 #endif /* HAVE_ERR_H */
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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45
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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46 #define MAX(a, b) (((a) > (b)) ? (a) : (b))
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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47
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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48 #define EXIT_USAGE 2
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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49
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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50 #define SENCRYPT_FORMAT_VERSION 1
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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51 #define PBKDF2_ITERATIONS 1000
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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52 #define SALT_LEN 16
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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53 #define BUFFER_SIZE (16 * 1024)
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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54 #define MAX_PASSWORD_LEN 256
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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55
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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56 enum {
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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57 CMD_SENCRYPT,
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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58 CMD_SDECRYPT
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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59 };
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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60
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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61 static void
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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62 openssl_warn(void) {
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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63 unsigned long errcode;
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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64
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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65 while ((errcode = ERR_get_error()) != 0) {
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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66 warnx("%s", ERR_error_string(errcode, NULL));
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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67 }
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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68 }
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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69
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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70 static size_t
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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71 read_keyfile(const char *filename, unsigned char *key, size_t key_size_max)
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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72 {
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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73 size_t keyfile_size = 0;
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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74 FILE *fp = NULL;
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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75 struct stat statbuf;
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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76
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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77 fp = fopen(filename, "r");
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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78 if (fp == NULL) {
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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79 warn("could not open key file \"%s\"", filename);
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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80 goto out;
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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81 }
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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82
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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83 if (fstat(fileno(fp), &statbuf) == -1) {
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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84 warn("could not stat key file \"%s\"", filename);
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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85 goto out;
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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86 }
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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87
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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88 if (!S_ISREG(statbuf.st_mode)) {
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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89 warnx("key file \"%s\" is not a regular file", filename);
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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90 goto out;
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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91 }
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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92
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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93 if ((uintmax_t)statbuf.st_size > SIZE_MAX) {
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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94 warnx("key file \"%s\" is too large", filename);
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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95 goto out;
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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96 }
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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97 keyfile_size = (size_t)statbuf.st_size;
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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98 if ((keyfile_size > key_size_max) ||
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
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99 (keyfile_size == 0)) {
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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100 warnx("invalid key size");
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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101 goto out;
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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102 }
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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103
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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104 if (fread(key, 1, keyfile_size, fp) != keyfile_size) {
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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105 warnx("could not read key file \"%s\"", filename);
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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106 goto out;
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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107 }
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
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108
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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109 out:
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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110 if (fp != NULL) {
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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111 fclose(fp);
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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112 }
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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113
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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114 return (keyfile_size);
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
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115 }
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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116
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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117 static int
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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118 find_algorithm(const char *algo_name, const EVP_CIPHER **cipher_ptr,
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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119 size_t *key_len_ptr)
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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120 {
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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121 int retval = 0;
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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122 const EVP_CIPHER *cipher = NULL;
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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123 size_t key_len = *key_len_ptr;
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
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124
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
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125 if (strcmp(algo_name, "aes") == 0) {
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
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126 switch (key_len) {
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
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127 case 0:
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
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128 key_len = 16;
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
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129 case 16:
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
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130 cipher = EVP_aes_128_cbc();
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
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131 break;
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
132 case 24:
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
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133 cipher = EVP_aes_192_cbc();
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
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134 break;
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
135 case 32:
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
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136 cipher = EVP_aes_256_cbc();
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
137 break;
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
138 default:
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
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139 warnx("invalid key length %zu", key_len);
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
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140 retval = -1;
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
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141 }
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
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142 } else if (strcmp(algo_name, "arcfour") == 0) {
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
143 if (key_len == 0) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
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144 key_len = 16;
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
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145 cipher = EVP_rc4();
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
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146 } else if (key_len <= EVP_MAX_KEY_LENGTH) {
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
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147 /*
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
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148 * for RC4 keys are not used verbatim but dervied using
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
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149 * PBKDF2 with a hardcoded key length of 128 bit
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Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
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150 */
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
151 key_len = 16;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
152 cipher = EVP_rc4();
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
153 } else {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
154 warnx("invalid key length %zu", key_len);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
155 retval = -1;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
156 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
157 } else if (strcmp(algo_name, "des") == 0) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
158 if (key_len == 0) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
159 key_len = 8;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
160 cipher = EVP_des_cbc();
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
161 } else if (key_len == 8) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
162 cipher = EVP_des_cbc();
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
163 } else {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
164 warnx("invalid key length %zu", key_len);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
165 retval = -1;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
166 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
167 } else if (strcmp(algo_name, "3des") == 0) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
168 if (key_len == 0) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
169 key_len = 24;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
170 cipher = EVP_des_ede3_cbc();
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
171 } else if (key_len == 24) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
172 cipher = EVP_des_ede3_cbc();
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
173 } else {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
174 warnx("invalid key length %zu", key_len);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
175 retval = -1;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
176 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
177 } else {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
178 warnx("unknown algorithm \"%s\"", algo_name);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
179 retval = -1;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
180 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
181
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
182 *cipher_ptr = cipher;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
183 *key_len_ptr = key_len;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
184
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
185 return (retval);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
186 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
187
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
188 static int
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
189 read_header(BIO *bio_in, uint32_t *iterations, unsigned char *iv, int iv_len,
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
190 unsigned char *salt, int salt_len)
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
191 {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
192 int read_len;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
193 uint32_t version;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
194 int retval = 0;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
195
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
196 read_len = BIO_read(bio_in, &version, sizeof (version));
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
197 if (read_len != sizeof (version)) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
198 warnx("failed to read version from input file");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
199 if (read_len < 0) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
200 openssl_warn();
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
201 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
202 retval = -1;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
203 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
204 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
205 version = htonl(version);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
206 if (version != SENCRYPT_FORMAT_VERSION) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
207 warnx("unknown format version %d", version);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
208 retval = -1;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
209 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
210 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
211
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
212 read_len = BIO_read(bio_in, iterations, sizeof (*iterations));
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
213 if (read_len != sizeof (*iterations)) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
214 warnx("failed to read iterations from input file");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
215 if (read_len < 0) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
216 openssl_warn();
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
217 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
218 retval = -1;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
219 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
220 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
221 *iterations = htonl(*iterations);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
222 if ((*iterations == 0) || ((sizeof (int) <= sizeof (uint32_t)) &&
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
223 (*iterations > INT_MAX))) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
224 warnx("invalid number of iterations");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
225 retval = -1;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
226 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
227 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
228
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
229 if (iv_len > 0) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
230 read_len = BIO_read(bio_in, iv, iv_len);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
231 if (read_len != iv_len) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
232 warnx("failed to read IV from input file");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
233 if (read_len < 0) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
234 openssl_warn();
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
235 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
236 retval = -1;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
237 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
238 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
239 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
240
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
241 read_len = BIO_read(bio_in, salt, salt_len);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
242 if (read_len != salt_len) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
243 warnx("failed to read salt from input file");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
244 if (read_len < 0) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
245 openssl_warn();
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
246 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
247 retval = -1;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
248 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
249 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
250
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
251 out:
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
252 return (retval);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
253 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
254
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
255 static int
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
256 sencrypt(const EVP_CIPHER *cipher, BIO *bio_in, BIO *bio_out,
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
257 const unsigned char *key, size_t key_len, const unsigned char *iv,
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
258 const unsigned char *salt)
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
259 {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
260 int retval = 0;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
261 uint32_t version;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
262 uint32_t iterations;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
263 int iv_len;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
264 int write_len;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
265 int read_len;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
266 BIO *bio_cipher = NULL;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
267 char *buf = NULL;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
268 EVP_CIPHER_CTX *cipher_ctx;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
269
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
270 /* set up cipher filter */
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
271 bio_cipher = BIO_new(BIO_f_cipher());
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
272 BIO_set_cipher(bio_cipher, cipher, NULL, NULL, 1);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
273 BIO_get_cipher_ctx(bio_cipher, &cipher_ctx);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
274 if (EVP_CIPHER_CTX_set_key_length(cipher_ctx, (int)key_len) != 1) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
275 warnx("failed to set key length");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
276 openssl_warn();
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
277 retval = 1;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
278 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
279 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
280 if (EVP_CipherInit_ex(cipher_ctx, NULL, NULL, key, iv, 1) != 1) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
281 warnx("failed to initialize cipher");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
282 openssl_warn();
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
283 retval = 1;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
284 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
285 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
286 BIO_push(bio_cipher, bio_out);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
287
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
288 /* write header */
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
289 version = htonl(SENCRYPT_FORMAT_VERSION);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
290 write_len = BIO_write(bio_out, &version, sizeof (version));
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
291 if (write_len != sizeof (version)) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
292 warnx("failed to write version to output file");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
293 if (write_len < 0) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
294 openssl_warn();
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
295 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
296 retval = 1;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
297 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
298 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
299
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
300 iterations = htonl(PBKDF2_ITERATIONS);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
301 write_len = BIO_write(bio_out, &iterations, sizeof (iterations));
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
302 if (write_len != sizeof (iterations)) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
303 warnx("failed to write iterations to output file");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
304 if (write_len < 0) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
305 openssl_warn();
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
306 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
307 retval = 1;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
308 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
309 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
310
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
311 iv_len = EVP_CIPHER_iv_length(cipher);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
312 if (iv_len > 0) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
313 write_len = BIO_write(bio_out, iv, iv_len);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
314 if (write_len != iv_len) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
315 warnx("failed to write IV to output file");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
316 if (write_len < 0) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
317 openssl_warn();
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
318 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
319 retval = 1;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
320 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
321 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
322 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
323
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
324 write_len = BIO_write(bio_out, salt, SALT_LEN);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
325 if (write_len != SALT_LEN) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
326 warnx("failed to write salt to output file");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
327 if (write_len < 0) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
328 openssl_warn();
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
329 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
330 retval = 1;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
331 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
332 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
333
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
334 if (BIO_flush(bio_out) < 1) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
335 warnx("failed to flush output file");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
336 openssl_warn();
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
337 retval = 1;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
338 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
339 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
340
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
341 buf = malloc(BUFFER_SIZE);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
342 if (buf == NULL) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
343 warn(NULL);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
344 retval = 1;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
345 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
346 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
347
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
348 /* encrypt data */
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
349 while ((read_len = BIO_read(bio_in, buf, BUFFER_SIZE)) > 0) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
350 if ((write_len = BIO_write(bio_cipher, buf, read_len)) !=
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
351 read_len) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
352 warnx("failed to write to output file");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
353 if (write_len < 0) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
354 openssl_warn();
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
355 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
356 retval = 1;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
357 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
358 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
359 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
360 if (read_len < 0) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
361 warnx("failed to read from input file");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
362 openssl_warn();
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
363 retval = 1;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
364 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
365 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
366
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
367 if (BIO_flush(bio_cipher) < 1) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
368 warnx("failed to flush output file");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
369 openssl_warn();
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
370 retval = 1;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
371 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
372 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
373
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
374 out:
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
375 free(buf);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
376
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
377 if (bio_cipher != NULL) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
378 BIO_pop(bio_cipher);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
379 BIO_free(bio_cipher);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
380 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
381
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
382 return (retval);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
383 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
384
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
385 static int
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
386 sdecrypt(const EVP_CIPHER *cipher, BIO *bio_in, BIO *bio_out,
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
387 const unsigned char *key, size_t key_len, const unsigned char *iv)
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
388 {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
389 int read_len;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
390 BIO *bio_cipher = NULL;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
391 int write_len;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
392 char *buf = NULL;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
393 EVP_CIPHER_CTX *cipher_ctx;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
394 int retval = 0;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
395
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
396 buf = malloc(BUFFER_SIZE);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
397 if (buf == NULL) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
398 warn(NULL);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
399 retval = 1;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
400 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
401 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
402
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
403 /* set up cipher filter */
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
404 bio_cipher = BIO_new(BIO_f_cipher());
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
405 BIO_set_cipher(bio_cipher, cipher, NULL, NULL, 0);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
406 BIO_get_cipher_ctx(bio_cipher, &cipher_ctx);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
407 if (EVP_CIPHER_CTX_set_key_length(cipher_ctx, (int)key_len) != 1) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
408 warnx("failed to set key length");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
409 openssl_warn();
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
410 retval = 1;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
411 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
412 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
413 if (EVP_CipherInit_ex(cipher_ctx, NULL, NULL, key, iv, 0) != 1) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
414 warnx("failed to initialize cipher");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
415 openssl_warn();
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
416 retval = 1;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
417 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
418 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
419 BIO_push(bio_cipher, bio_in);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
420
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
421 /* decrypt data */
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
422 while ((read_len = BIO_read(bio_cipher, buf, BUFFER_SIZE)) > 0) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
423 if ((write_len = BIO_write(bio_out, buf, read_len)) !=
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
424 read_len) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
425 warnx("failed to write to to output file");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
426 if (write_len < 0) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
427 openssl_warn();
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
428 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
429 retval = 1;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
430 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
431 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
432 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
433 if (read_len < 0) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
434 warnx("failed to read from input file");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
435 openssl_warn();
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
436 retval = 1;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
437 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
438 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
439
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
440 if (BIO_flush(bio_out) < 1) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
441 warnx("failed to flush output file");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
442 openssl_warn();
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
443 retval = 1;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
444 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
445 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
446
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
447 if (BIO_get_cipher_status(bio_cipher) == 0) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
448 warnx("decryption failed");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
449 openssl_warn();
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
450 retval = 1;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
451 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
452 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
453
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
454 out:
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
455 free(buf);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
456
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
457 if (bio_cipher != NULL) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
458 BIO_pop(bio_cipher);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
459 BIO_free(bio_cipher);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
460 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
461
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
462 return (retval);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
463 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
464
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
465 static void
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
466 list_algorithms(void)
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
467 {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
468 printf("Algorithm Keysize: Min Max (bits)\n"
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
469 "------------------------------------------\n");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
470 printf("%-15s %5u %5u\n", "aes", 128, 256);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
471 printf("%-15s %5u %5u\n", "arcfour", 8,
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
472 EVP_MAX_KEY_LENGTH * 8);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
473 printf("%-15s %5u %5u\n", "des", 64, 64);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
474 printf("%-15s %5u %5u\n", "3des", 192, 192);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
475 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
476
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
477 static void
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
478 usage(int cmd)
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
479 {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
480 if (cmd == CMD_SENCRYPT) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
481 fprintf(stderr, "usage: sencrypt -l | [-v] -a algorithm "
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
482 "[-k key_file] [-i input_file] [-o output_file]\n");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
483 } else if (cmd == CMD_SDECRYPT) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
484 fprintf(stderr, "usage: sdecrypt -l | [-v] -a algorithm "
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
485 "[-k key_file] [-i input_file] [-o output_file]\n");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
486 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
487 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
488
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
489 int
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
490 main(int argc, char *argv[])
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
491 {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
492 char *progname;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
493 int cmd;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
494 int c;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
495 bool aflag = false;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
496 char *algo_name = NULL;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
497 bool is_algo_rc4 = false;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
498 bool iflag = false;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
499 char *in_filename = NULL;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
500 bool kflag = false;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
501 char *key_filename = NULL;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
502 bool lflag = false;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
503 bool oflag = false;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
504 char *out_filename = NULL;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
505 bool vflag = false;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
506 bool errflag = false;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
507 unsigned char key[EVP_MAX_KEY_LENGTH];
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
508 size_t key_len = 0;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
509 size_t key_file_len;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
510 const EVP_CIPHER *cipher;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
511 BIO *bio_in = NULL;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
512 uint32_t iterations = PBKDF2_ITERATIONS;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
513 unsigned char iv[EVP_MAX_IV_LENGTH];
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
514 unsigned char salt[SALT_LEN];
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
515 BIO *bio_out = NULL;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
516 int need_tmpfile = 0;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
517 FILE *fp_in;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
518 struct stat statbuf_in;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
519 struct stat statbuf_out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
520 int fd_tmp = -1;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
521 FILE *fp_tmp = NULL;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
522 char *out_filename_tmp = NULL;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
523 char *out_dir = NULL;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
524 char *tmp_filename = NULL;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
525 int len;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
526 mode_t old_mode;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
527 char pwdata[MAX(MAX_PASSWORD_LEN, EVP_MAX_KEY_LENGTH)];
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
528 size_t pwdata_len = 0;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
529 int status = EXIT_SUCCESS;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
530
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
531 /* initialize OpenSSL */
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
532 OpenSSL_add_all_algorithms();
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
533 ERR_load_crypto_strings();
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
534 OPENSSL_config(NULL);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
535
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
536 progname = strrchr(argv[0], '/');
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
537 progname = (progname != NULL) ? progname + 1 : argv[0];
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
538 if ((strcmp(progname, "sencrypt") == 0) ||
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
539 (strcmp(progname, "encrypt") == 0)) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
540 cmd = CMD_SENCRYPT;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
541 } else if ((strcmp(progname, "sdecrypt") == 0) ||
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
542 (strcmp(progname, "decrypt") == 0)) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
543 cmd = CMD_SDECRYPT;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
544 } else {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
545 fprintf(stderr, "invalid command name");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
546 status = EXIT_FAILURE;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
547 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
548 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
549
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
550 while (!errflag && (c = getopt(argc, argv, "a:i:k:lo:v")) != -1) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
551 switch (c) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
552 case 'a':
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
553 aflag = true;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
554 algo_name = optarg;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
555 is_algo_rc4 = (strcmp(algo_name, "arcfour") == 0);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
556 break;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
557 case 'i':
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
558 iflag = true;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
559 in_filename = optarg;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
560 break;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
561 case 'k':
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
562 kflag = true;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
563 key_filename = optarg;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
564 break;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
565 case 'l':
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
566 lflag = true;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
567 break;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
568 case 'o':
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
569 oflag = true;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
570 out_filename = optarg;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
571 break;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
572 case 'v':
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
573 vflag = true;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
574 break;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
575 default:
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
576 errflag = true;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
577 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
578 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
579 if (errflag || (!lflag && !aflag) || (lflag && aflag) ||
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
580 (argc > optind)) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
581 usage(cmd);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
582 status = EXIT_USAGE;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
583 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
584 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
585
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
586 if (lflag) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
587 list_algorithms();
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
588 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
589 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
590
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
591 if (kflag) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
592 key_file_len = read_keyfile(key_filename, key,
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
593 (off_t)sizeof (key));
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
594 if (key_file_len < 1) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
595 status = EXIT_FAILURE;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
596 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
597 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
598 key_len = key_file_len;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
599 } else {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
600 if (EVP_read_pw_string(pwdata, sizeof (pwdata), "Enter key:",
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
601 (cmd == CMD_SENCRYPT) ? 1 : 0) != 0) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
602 warnx("could not read passphrase");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
603 openssl_warn();
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
604 status = EXIT_FAILURE;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
605 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
606 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
607 pwdata_len = strlen(pwdata);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
608 if (pwdata_len < 1) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
609 warnx("invalid passphrase");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
610 status = EXIT_FAILURE;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
611 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
612 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
613 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
614
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
615 /* the cipher is determined based on name and length of the key file */
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
616 if (find_algorithm(algo_name, &cipher, &key_len) == -1) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
617 status = EXIT_FAILURE;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
618 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
619 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
620
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
621 if (iflag) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
622 bio_in = BIO_new_file(in_filename, "r");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
623 } else {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
624 bio_in = BIO_new_fp(stdin, BIO_NOCLOSE);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
625 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
626 if (bio_in == NULL) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
627 warnx("could not open input file");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
628 openssl_warn();
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
629 status = EXIT_FAILURE;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
630 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
631 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
632
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
633 if (cmd == CMD_SENCRYPT) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
634 /* generate random salt and IV */
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
635 if ((RAND_bytes(salt, sizeof (salt)) == 0) ||
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
636 (RAND_bytes(iv, EVP_CIPHER_iv_length(cipher)) == 0)) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
637 /* not enough entropy or unknown error */
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
638 warnx("failed to generate random data");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
639 status = EXIT_FAILURE;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
640 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
641 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
642 } else {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
643 read_header(bio_in, &iterations, iv,
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
644 EVP_CIPHER_iv_length(cipher), salt, (int)sizeof (salt));
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
645 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
646
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
647 /*
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
648 * if no keyfile was given or the RC4 cipher is used, derive the key
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
649 * from the password and salt
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
650 */
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
651 if (kflag && is_algo_rc4) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
652 memcpy(pwdata, key, key_file_len);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
653 pwdata_len = key_file_len;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
654 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
655 if (!kflag || is_algo_rc4) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
656 if (PKCS5_PBKDF2_HMAC_SHA1(pwdata, (int)pwdata_len, salt,
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
657 sizeof (salt), (int)iterations, (int)key_len, key) == 0) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
658 warnx("failed to generate key");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
659 status = EXIT_FAILURE;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
660 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
661 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
662 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
663
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
664 if (oflag) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
665 /*
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
666 * if input and output files are identical, create and write the
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
667 * output to a temporary file for the output which is then
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
668 * renamed to out_filename
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
669 */
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
670 if (iflag) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
671 BIO_get_fp(bio_in, &fp_in);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
672 if (fstat(fileno(fp_in), &statbuf_in) == -1) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
673 warn("could not stat input file");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
674 status = EXIT_FAILURE;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
675 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
676 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
677 if (stat(out_filename, &statbuf_out) == -1) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
678 if (errno != ENOENT) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
679 warn("could not stat output file");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
680 status = EXIT_FAILURE;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
681 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
682 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
683 } else if ((statbuf_in.st_ino == statbuf_out.st_ino) &&
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
684 (statbuf_in.st_dev == statbuf_out.st_dev)) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
685 need_tmpfile = 1;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
686 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
687 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
688
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
689 if (need_tmpfile) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
690 out_filename_tmp = strdup(out_filename);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
691 if (out_filename_tmp == NULL) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
692 warn(NULL);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
693 status = EXIT_FAILURE;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
694 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
695 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
696 out_dir = dirname(out_filename_tmp);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
697 len = snprintf(NULL, 0, "%s/sencryptXXXXXX", out_dir);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
698 if (len < 0) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
699 warn(NULL);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
700 status = EXIT_FAILURE;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
701 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
702 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
703 tmp_filename = malloc((size_t)len + 1);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
704 if (tmp_filename == NULL) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
705 warn(NULL);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
706 status = EXIT_FAILURE;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
707 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
708 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
709 if (snprintf(tmp_filename, (size_t)len + 1,
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
710 "%s/sencryptXXXXXX", out_dir) != len) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
711 warn(NULL);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
712 status = EXIT_FAILURE;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
713 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
714 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
715 old_mode = umask(077);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
716 fd_tmp = mkstemp(tmp_filename);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
717 umask(old_mode);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
718 if (fd_tmp == -1) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
719 warn("could not create temporary file");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
720 status = EXIT_FAILURE;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
721 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
722 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
723 fp_tmp = fdopen(fd_tmp, "w");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
724 if (fp_tmp == NULL) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
725 warn("could not open temporary file");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
726 status = EXIT_FAILURE;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
727 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
728 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
729 fd_tmp = -1;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
730 bio_out = BIO_new_fp(fp_tmp, BIO_CLOSE);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
731 if (bio_out == NULL) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
732 warnx("could not open temporary file");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
733 openssl_warn();
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
734 status = EXIT_FAILURE;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
735 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
736 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
737 fp_tmp = NULL;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
738 } else {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
739 old_mode = umask(077);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
740 bio_out = BIO_new_file(out_filename, "w");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
741 umask(old_mode);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
742 if (bio_out == NULL) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
743 warnx("could not open output file");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
744 openssl_warn();
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
745 status = EXIT_FAILURE;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
746 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
747 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
748 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
749 } else {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
750 bio_out = BIO_new_fp(stdout, BIO_NOCLOSE);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
751 if (bio_out == NULL) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
752 warnx("could not open output file");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
753 openssl_warn();
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
754 status = EXIT_FAILURE;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
755 goto out;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
756 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
757 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
758
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
759 if (cmd == CMD_SENCRYPT) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
760 if (sencrypt(cipher, bio_in, bio_out, key, key_len,
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
761 iv, salt) == -1) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
762 status = EXIT_FAILURE;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
763 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
764 } else {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
765 if (sdecrypt(cipher, bio_in, bio_out, key, key_len,
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
766 iv) == -1) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
767 status = EXIT_FAILURE;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
768 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
769 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
770
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
771 out:
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
772 OPENSSL_cleanse(pwdata, pwdata_len);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
773 OPENSSL_cleanse(key, key_len);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
774
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
775 if (fd_tmp != -1) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
776 close(fd_tmp);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
777 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
778
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
779 if (fp_tmp != NULL) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
780 fclose(fp_tmp);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
781 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
782
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
783 if (bio_in != NULL) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
784 BIO_free_all(bio_in);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
785 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
786
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
787 if (bio_out != NULL) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
788 BIO_free_all(bio_out);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
789
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
790 if (status == 0) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
791 if (need_tmpfile) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
792 if (rename(tmp_filename, out_filename) == -1) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
793 warn("could not create output file");
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
794 status = EXIT_FAILURE;
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
795 unlink(tmp_filename);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
796 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
797 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
798 } else {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
799 if (need_tmpfile) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
800 unlink(tmp_filename);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
801 } else if (oflag) {
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
802 unlink(out_filename);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
803 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
804 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
805 }
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
806
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
807 free(out_filename_tmp);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
808 free(tmp_filename);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
809
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
810 EVP_cleanup();
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
811 ERR_free_strings();
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
812 CONF_modules_free();
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
813
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
814 exit(status);
73af139d1a94 Initial revision
Guido Berhoerster <guido+sencrypt@berhoerster.name>
parents:
diff changeset
815 }