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annotate libtomcrypt/demos/openssl-enc.c @ 1933:e093ddc5b585

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Fix extra default -i arguments for multihop When multihop executes dbclient it should only add -i arguments from the original commandline, not the default id_dropbear key. Otherwise multiple -i arguments keep getting added which results in servers disconnecting with too many auth attempts
author Matt Johnston <matt@ucc.asn.au>
date Fri, 01 Apr 2022 11:56:10 +0800
parents 6dba84798cd5
children
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rev   line source
1471
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1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
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2 *
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3 * LibTomCrypt is a library that provides various cryptographic
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4 * algorithms in a highly modular and flexible manner.
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5 *
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6 * The library is free for all purposes without any express
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7 * guarantee it works.
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8 */
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9
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10 /*
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11 * Demo to do the rough equivalent of:
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12 *
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13 * openssl enc -aes-256-cbc -pass pass:foobar -in infile -out outfile -p
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14 *
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15 * Compilation:
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16 *
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17 * $(CC) -I /path/to/headers -L .../libs \
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18 * -o openssl-enc \
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19 * openssl-enc.c -ltomcrypt
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20 *
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21 * Usage:
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22 *
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23 * ./openssl-enc <enc|dec> infile outfile "passphrase" [salt]
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24 *
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25 * If provided, the salt must be EXACTLY a 16-char hex string.
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26 *
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27 * Demo is an example of:
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28 *
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29 * - (When decrypting) yanking salt out of the OpenSSL "Salted__..." header
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30 * - OpenSSL-compatible key derivation (in OpenSSL's modified PKCS#5v1 approach)
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31 * - Grabbing an Initialization Vector from the key generator
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32 * - Performing simple block encryption using AES
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33 * - PKCS#7-type padding (which hopefully can get ripped out of this demo and
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34 * made a libtomcrypt thing someday).
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35 *
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36 * This program is free for all purposes without any express guarantee it
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37 * works. If you really want to see a license here, assume the WTFPL :-)
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38 *
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39 * BJ Black, [email protected], https://wjblack.com
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40 *
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41 * BUGS:
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42 * Passing a password on a command line is a HORRIBLE idea. Don't use
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43 * this program for serious work!
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44 */
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45
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46 #include <tomcrypt.h>
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47
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48 #ifndef LTC_RIJNDAEL
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49 #error Cannot compile this demo; Rijndael (AES) required
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50 #endif
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51 #ifndef LTC_CBC_MODE
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52 #error Cannot compile this demo; CBC mode required
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53 #endif
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54 #ifndef LTC_PKCS_5
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55 #error Cannot compile this demo; PKCS5 required
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56 #endif
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57 #ifndef LTC_RNG_GET_BYTES
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58 #error Cannot compile this demo; random generator required
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59 #endif
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60 #ifndef LTC_MD5
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61 #error Cannot compile this demo; MD5 required
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62 #endif
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63
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64 /* OpenSSL by default only runs one hash round */
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65 #define OPENSSL_ITERATIONS 1
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66 /* Use aes-256-cbc, so 256 bits of key, 128 of IV */
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67 #define KEY_LENGTH (256>>3)
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68 #define IV_LENGTH (128>>3)
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69 /* PKCS#5v1 requires exactly an 8-byte salt */
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70 #define SALT_LENGTH 8
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71 /* The header OpenSSL puts on an encrypted file */
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72 static char salt_header[] = { 'S', 'a', 'l', 't', 'e', 'd', '_', '_' };
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73
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74 #include <errno.h>
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75 #include <stdio.h>
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76 #include <string.h>
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77
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78 /* A simple way to handle the possibility that a block may increase in size
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79 after padding. */
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80 union paddable {
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81 unsigned char unpad[1024];
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82 unsigned char pad[1024+MAXBLOCKSIZE];
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83 };
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84
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85 /*
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86 * Print usage and exit with a bad status (and perror() if any errno).
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87 *
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88 * Input: argv[0] and the error string
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89 * Output: <no return>
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90 * Side Effects: print messages and barf (does exit(3))
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91 */
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92 void barf(const char *pname, const char *err)
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93 {
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94 printf("Usage: %s <enc|dec> infile outfile passphrase [salt]\n", pname);
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95 printf("\n");
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96 printf(" # encrypts infile->outfile, random salt\n");
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97 printf(" %s enc infile outfile \"passphrase\"\n", pname);
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98 printf("\n");
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99 printf(" # encrypts infile->outfile, salt from cmdline\n");
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100 printf(" %s enc infile outfile pass 0123456789abcdef\n", pname);
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101 printf("\n");
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102 printf(" # decrypts infile->outfile, pulls salt from infile\n");
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103 printf(" %s dec infile outfile pass\n", pname);
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104 printf("\n");
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105 printf(" # decrypts infile->outfile, salt specified\n");
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106 printf(" # (don't try to read the salt from infile)\n");
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107 printf(" %s dec infile outfile pass 0123456789abcdef"
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108 "\n", pname);
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109 printf("\n");
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110 printf("Application Error: %s\n", err);
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111 if(errno)
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112 perror(" System Error");
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113 exit(-1);
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114 }
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115
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116 /*
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117 * Parse a salt value passed in on the cmdline.
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118 *
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119 * Input: string passed in and a buf to put it in (exactly 8 bytes!)
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120 * Output: CRYPT_OK if parsed OK, CRYPT_ERROR if not
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121 * Side Effects: none
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122 */
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123 int parse_hex_salt(unsigned char *in, unsigned char *out)
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124 {
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125 int idx;
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126 for(idx=0; idx<SALT_LENGTH; idx++)
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127 if(sscanf((char*)in+idx*2, "%02hhx", out+idx) != 1)
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128 return CRYPT_ERROR;
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129 return CRYPT_OK;
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130 }
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131
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132 /*
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133 * Parse the Salted__[+8 bytes] from an OpenSSL-compatible file header.
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134 *
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135 * Input: file to read from and a to put the salt in (exactly 8 bytes!)
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136 * Output: CRYPT_OK if parsed OK, CRYPT_ERROR if not
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137 * Side Effects: infile's read pointer += 16
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138 */
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diff changeset
139 int parse_openssl_header(FILE *in, unsigned char *out)
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140 {
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141 unsigned char tmp[SALT_LENGTH];
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142 if(fread(tmp, 1, sizeof(tmp), in) != sizeof(tmp))
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143 return CRYPT_ERROR;
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144 if(memcmp(tmp, salt_header, sizeof(tmp)))
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145 return CRYPT_ERROR;
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diff changeset
146 if(fread(tmp, 1, sizeof(tmp), in) != sizeof(tmp))
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147 return CRYPT_ERROR;
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148 memcpy(out, tmp, sizeof(tmp));
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149 return CRYPT_OK;
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150 }
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151
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152 /*
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153 * Dump a hexed stream of bytes (convenience func).
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154 *
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155 * Input: buf to read from, length
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156 * Output: none
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157 * Side Effects: bytes printed as a hex blob, no lf at the end
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158 */
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159 void dump_bytes(unsigned char *in, unsigned long len)
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160 {
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161 unsigned long idx;
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162 for(idx=0; idx<len; idx++)
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163 printf("%02hhX", *(in+idx));
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164 }
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165
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166 /*
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167 * Pad or unpad a message using PKCS#7 padding.
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168 * Padding will add 1-(blocksize) bytes and unpadding will remove that amount.
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169 * Set is_padding to 1 to pad, 0 to unpad.
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170 *
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171 * Input: paddable buffer, size read, block length of cipher, mode
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172 * Output: number of bytes after padding resp. after unpadding
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173 * Side Effects: none
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174 */
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175 size_t pkcs7_pad(union paddable *buf, size_t nb, int block_length,
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176 int is_padding)
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177 {
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178 unsigned char padval;
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179 off_t idx;
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180
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181 if(is_padding) {
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182 /* We are PADDING this block (and therefore adding bytes) */
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183 /* The pad value in PKCS#7 is the number of bytes remaining in
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184 the block, so for a 16-byte block and 3 bytes left, it's
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185 0x030303. In the oddball case where nb is an exact multiple
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186 multiple of block_length, set the padval to blocksize (i.e.
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187 add one full block) */
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188 padval = (unsigned char) (block_length - (nb % block_length));
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189 padval = padval ? padval : block_length;
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190
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191 memset(buf->pad+nb, padval, padval);
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192 return nb+padval;
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193 } else {
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194 /* We are UNPADDING this block (and removing bytes)
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195 We really just need to verify that the pad bytes are correct,
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196 so start at the end of the string and work backwards. */
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197
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198 /* Figure out what the padlength should be by looking at the
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199 last byte */
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200 idx = nb-1;
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201 padval = buf->pad[idx];
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202
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203 /* padval must be nonzero and <= block length */
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204 if(padval <= 0 || padval > block_length)
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205 return 0;
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206
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207 /* First byte's accounted for; do the rest */
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208 idx--;
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209
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210 while(idx >= (off_t)(nb-padval))
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211 if(buf->pad[idx] != padval)
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diff changeset
212 return 0;
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213 else
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214 idx--;
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215
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216 /* If we got here, the pad checked out, so return a smaller
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217 number of bytes than nb (basically where we left off+1) */
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218 return idx+1;
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219 }
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220 }
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221
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222 /*
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223 * Perform an encrypt/decrypt operation to/from files using AES+CBC+PKCS7 pad.
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224 * Set encrypt to 1 to encrypt, 0 to decrypt.
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225 *
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226 * Input: in/out files, key, iv, and mode
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227 * Output: CRYPT_OK if no error
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228 * Side Effects: bytes slurped from infile, pushed to outfile, fds updated.
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229 */
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diff changeset
230 int do_crypt(FILE *infd, FILE *outfd, unsigned char *key, unsigned char *iv,
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diff changeset
231 int encrypt)
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232 {
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233 union paddable inbuf, outbuf;
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diff changeset
234 int cipher, ret;
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diff changeset
235 symmetric_CBC cbc;
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diff changeset
236 size_t nb;
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diff changeset
237
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diff changeset
238 /* Register your cipher! */
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diff changeset
239 cipher = register_cipher(&aes_desc);
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diff changeset
240 if(cipher == -1)
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diff changeset
241 return CRYPT_INVALID_CIPHER;
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diff changeset
242
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243 /* Start a CBC session with cipher/key/val params */
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diff changeset
244 ret = cbc_start(cipher, iv, key, KEY_LENGTH, 0, &cbc);
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245 if( ret != CRYPT_OK )
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diff changeset
246 return -1;
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diff changeset
247
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diff changeset
248 do {
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diff changeset
249 /* Get bytes from the source */
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diff changeset
250 nb = fread(inbuf.unpad, 1, sizeof(inbuf.unpad), infd);
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diff changeset
251 if(!nb)
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diff changeset
252 return encrypt ? CRYPT_OK : CRYPT_ERROR;
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diff changeset
253
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diff changeset
254 /* Barf if we got a read error */
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diff changeset
255 if(ferror(infd))
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diff changeset
256 return CRYPT_ERROR;
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diff changeset
257
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diff changeset
258 if(encrypt) {
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diff changeset
259 /* We're encrypting, so pad first (if at EOF) and then
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diff changeset
260 crypt */
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diff changeset
261 if(feof(infd))
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diff changeset
262 nb = pkcs7_pad(&inbuf, nb,
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diff changeset
263 aes_desc.block_length, 1);
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diff changeset
264
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diff changeset
265 ret = cbc_encrypt(inbuf.pad, outbuf.pad, nb, &cbc);
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diff changeset
266 if(ret != CRYPT_OK)
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diff changeset
267 return ret;
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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parents:
diff changeset
268
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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parents:
diff changeset
269 } else {
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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diff changeset
270 /* We're decrypting, so decrypt and then unpad if at
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
271 EOF */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
272 ret = cbc_decrypt(inbuf.unpad, outbuf.unpad, nb, &cbc);
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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parents:
diff changeset
273 if( ret != CRYPT_OK )
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
274 return ret;
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
275
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
276 if( feof(infd) )
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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parents:
diff changeset
277 nb = pkcs7_pad(&outbuf, nb,
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
278 aes_desc.block_length, 0);
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
279 if(nb == 0)
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
280 /* The file didn't decrypt correctly */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
281 return CRYPT_ERROR;
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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parents:
diff changeset
282
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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parents:
diff changeset
283 }
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
284
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
285 /* Push bytes to outfile */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
286 if(fwrite(outbuf.unpad, 1, nb, outfd) != nb)
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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parents:
diff changeset
287 return CRYPT_ERROR;
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
288
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
289 } while(!feof(infd));
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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parents:
diff changeset
290
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
291 /* Close up */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
292 cbc_done(&cbc);
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
293
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
294 return CRYPT_OK;
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
295 }
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
296
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
297 /* Convenience macro for the various barfable places below */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
298 #define BARF(a) { \
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
299 if(infd) fclose(infd); \
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
300 if(outfd) { fclose(outfd); remove(argv[3]); } \
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
301 barf(argv[0], a); \
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
302 }
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
303 /*
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
304 * The main routine. Mostly validate cmdline params, open files, run the KDF,
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
305 * and do the crypt.
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
306 */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
307 int main(int argc, char *argv[]) {
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
308 unsigned char salt[SALT_LENGTH];
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
309 FILE *infd = NULL, *outfd = NULL;
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
310 int encrypt = -1;
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
311 int hash = -1;
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
312 int ret;
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
313 unsigned char keyiv[KEY_LENGTH + IV_LENGTH];
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
314 unsigned long keyivlen = (KEY_LENGTH + IV_LENGTH);
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
315 unsigned char *key, *iv;
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
316
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
317 /* Check proper number of cmdline args */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
318 if(argc < 5 || argc > 6)
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
319 BARF("Invalid number of arguments");
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
320
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
321 /* Check proper mode of operation */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
322 if (!strncmp(argv[1], "enc", 3))
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
323 encrypt = 1;
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
324 else if(!strncmp(argv[1], "dec", 3))
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
325 encrypt = 0;
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
326 else
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
327 BARF("Bad command name");
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
328
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
329 /* Check we can open infile/outfile */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
330 infd = fopen(argv[2], "rb");
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
331 if(infd == NULL)
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
332 BARF("Could not open infile");
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
333 outfd = fopen(argv[3], "wb");
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
334 if(outfd == NULL)
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
335 BARF("Could not open outfile");
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
336
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
337 /* Get the salt from wherever */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
338 if(argc == 6) {
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
339 /* User-provided */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
340 if(parse_hex_salt((unsigned char*) argv[5], salt) != CRYPT_OK)
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
341 BARF("Bad user-specified salt");
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
342 } else if(!strncmp(argv[1], "enc", 3)) {
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
343 /* Encrypting; get from RNG */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
344 if(rng_get_bytes(salt, sizeof(salt), NULL) != sizeof(salt))
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
345 BARF("Not enough random data");
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
346 } else {
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
347 /* Parse from infile (decrypt only) */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
348 if(parse_openssl_header(infd, salt) != CRYPT_OK)
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
349 BARF("Invalid OpenSSL header in infile");
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
350 }
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
351
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
352 /* Fetch the MD5 hasher for PKCS#5 */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
353 hash = register_hash(&md5_desc);
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
354 if(hash == -1)
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
355 BARF("Could not register MD5 hash");
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
356
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
357 /* Set things to a sane initial state */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
358 zeromem(keyiv, sizeof(keyiv));
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
359 key = keyiv + 0; /* key comes first */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
360 iv = keyiv + KEY_LENGTH; /* iv comes next */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
361
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
362 /* Run the key derivation from the provided passphrase. This gets us
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
363 the key and iv. */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
364 ret = pkcs_5_alg1_openssl((unsigned char*)argv[4], strlen(argv[4]), salt,
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
365 OPENSSL_ITERATIONS, hash, keyiv, &keyivlen );
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
366 if(ret != CRYPT_OK)
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
367 BARF("Could not derive key/iv from passphrase");
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
368
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
369 /* Display the salt/key/iv like OpenSSL cmdline does when -p */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
370 printf("salt="); dump_bytes(salt, sizeof(salt)); printf("\n");
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
371 printf("key="); dump_bytes(key, KEY_LENGTH); printf("\n");
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
372 printf("iv ="); dump_bytes(iv, IV_LENGTH ); printf("\n");
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
373
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
374 /* If we're encrypting, write the salt header as OpenSSL does */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
375 if(!strncmp(argv[1], "enc", 3)) {
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
376 if(fwrite(salt_header, 1, sizeof(salt_header), outfd) !=
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
377 sizeof(salt_header) )
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
378 BARF("Error writing salt header to outfile");
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
379 if(fwrite(salt, 1, sizeof(salt), outfd) != sizeof(salt))
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
380 BARF("Error writing salt to outfile");
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
381 }
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
382
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
383 /* At this point, the files are open, the salt has been figured out,
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
384 and we're ready to pump data through crypt. */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
385
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
386 /* Do the crypt operation */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
387 if(do_crypt(infd, outfd, key, iv, encrypt) != CRYPT_OK)
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
388 BARF("Error during crypt operation");
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
389
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
390 /* Clean up */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
391 fclose(infd); fclose(outfd);
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
392 return 0;
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
393 }
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
394
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
395 /* ref: $Format:%D$ */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
396 /* git commit: $Format:%H$ */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
397 /* commit time: $Format:%ai$ */