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annotate libtomcrypt/demos/openssl-enc.c @ 1902:4a6725ac957c

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Revert "Don't include sk keys at all in KEX list" This reverts git commit f972813ecdc7bb981d25b5a63638bd158f1c8e72. The sk algorithms need to remain in the sigalgs list so that they are included in the server-sig-algs ext-info message sent by the server. RFC8308 for server-sig-algs requires that all algorithms are listed (though OpenSSH client 8.4p1 tested doesn't require that)
author Matt Johnston <matt@ucc.asn.au>
date Thu, 24 Mar 2022 13:42:08 +0800
parents 6dba84798cd5
children
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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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diff changeset
140 {
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141 unsigned char tmp[SALT_LENGTH];
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diff changeset
142 if(fread(tmp, 1, sizeof(tmp), in) != sizeof(tmp))
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143 return CRYPT_ERROR;
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diff changeset
144 if(memcmp(tmp, salt_header, sizeof(tmp)))
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diff changeset
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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diff changeset
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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diff changeset
199 last byte */
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200 idx = nb-1;
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diff changeset
201 padval = buf->pad[idx];
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diff changeset
202
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203 /* padval must be nonzero and <= block length */
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diff changeset
204 if(padval <= 0 || padval > block_length)
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205 return 0;
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diff changeset
206
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diff changeset
207 /* First byte's accounted for; do the rest */
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diff changeset
208 idx--;
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209
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210 while(idx >= (off_t)(nb-padval))
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diff changeset
211 if(buf->pad[idx] != padval)
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diff changeset
212 return 0;
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diff changeset
213 else
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diff changeset
214 idx--;
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diff changeset
215
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diff changeset
216 /* If we got here, the pad checked out, so return a smaller
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diff changeset
217 number of bytes than nb (basically where we left off+1) */
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diff changeset
218 return idx+1;
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diff changeset
219 }
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220 }
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diff changeset
221
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diff changeset
222 /*
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diff changeset
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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diff changeset
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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diff changeset
232 {
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diff changeset
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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diff changeset
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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diff changeset
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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parents:
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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Matt Johnston <matt@ucc.asn.au>
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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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parents:
diff changeset
266 if(ret != CRYPT_OK)
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
267 return ret;
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
268
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
269 } else {
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
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
Matt Johnston <matt@ucc.asn.au>
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
Matt Johnston <matt@ucc.asn.au>
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
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
282
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
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
Matt Johnston <matt@ucc.asn.au>
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
Matt Johnston <matt@ucc.asn.au>
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: $Format:%ai$ */