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| author | cvs2svn <admin@example.com> | 2012-07-13 17:49:56 +0000 |
|---|---|---|
| committer | cvs2svn <admin@example.com> | 2012-07-13 17:49:56 +0000 |
| commit | ee04221ea8063435416c7e6369e6eae76843aa71 (patch) | |
| tree | 821921a1dd0a5a3cece91121e121cc63c4b68128 /src/lib/libcrypto/modes/cts128.c | |
| parent | adf6731f6e1d04718aee00cb93435143046aee9a (diff) | |
| download | openbsd-eric_g2k12.tar.gz openbsd-eric_g2k12.tar.bz2 openbsd-eric_g2k12.zip | |
This commit was manufactured by cvs2git to create tag 'eric_g2k12'.eric_g2k12
Diffstat (limited to '')
| -rw-r--r-- | src/lib/libcrypto/modes/cts128.c | 259 |
1 files changed, 0 insertions, 259 deletions
diff --git a/src/lib/libcrypto/modes/cts128.c b/src/lib/libcrypto/modes/cts128.c deleted file mode 100644 index e0430f9fdc..0000000000 --- a/src/lib/libcrypto/modes/cts128.c +++ /dev/null | |||
| @@ -1,259 +0,0 @@ | |||
| 1 | /* ==================================================================== | ||
| 2 | * Copyright (c) 2008 The OpenSSL Project. All rights reserved. | ||
| 3 | * | ||
| 4 | * Rights for redistribution and usage in source and binary | ||
| 5 | * forms are granted according to the OpenSSL license. | ||
| 6 | */ | ||
| 7 | |||
| 8 | #include "modes.h" | ||
| 9 | #include <string.h> | ||
| 10 | |||
| 11 | #ifndef MODES_DEBUG | ||
| 12 | # ifndef NDEBUG | ||
| 13 | # define NDEBUG | ||
| 14 | # endif | ||
| 15 | #endif | ||
| 16 | #include <assert.h> | ||
| 17 | |||
| 18 | /* | ||
| 19 | * Trouble with Ciphertext Stealing, CTS, mode is that there is no | ||
| 20 | * common official specification, but couple of cipher/application | ||
| 21 | * specific ones: RFC2040 and RFC3962. Then there is 'Proposal to | ||
| 22 | * Extend CBC Mode By "Ciphertext Stealing"' at NIST site, which | ||
| 23 | * deviates from mentioned RFCs. Most notably it allows input to be | ||
| 24 | * of block length and it doesn't flip the order of the last two | ||
| 25 | * blocks. CTS is being discussed even in ECB context, but it's not | ||
| 26 | * adopted for any known application. This implementation complies | ||
| 27 | * with mentioned RFCs and [as such] extends CBC mode. | ||
| 28 | */ | ||
| 29 | |||
| 30 | size_t CRYPTO_cts128_encrypt_block(const unsigned char *in, unsigned char *out, | ||
| 31 | size_t len, const void *key, | ||
| 32 | unsigned char ivec[16], block128_f block) | ||
| 33 | { size_t residue, n; | ||
| 34 | |||
| 35 | assert (in && out && key && ivec); | ||
| 36 | |||
| 37 | if (len <= 16) return 0; | ||
| 38 | |||
| 39 | if ((residue=len%16) == 0) residue = 16; | ||
| 40 | |||
| 41 | len -= residue; | ||
| 42 | |||
| 43 | CRYPTO_cbc128_encrypt(in,out,len,key,ivec,block); | ||
| 44 | |||
| 45 | in += len; | ||
| 46 | out += len; | ||
| 47 | |||
| 48 | for (n=0; n<residue; ++n) | ||
| 49 | ivec[n] ^= in[n]; | ||
| 50 | (*block)(ivec,ivec,key); | ||
| 51 | memcpy(out,out-16,residue); | ||
| 52 | memcpy(out-16,ivec,16); | ||
| 53 | |||
| 54 | return len+residue; | ||
| 55 | } | ||
| 56 | |||
| 57 | size_t CRYPTO_cts128_encrypt(const unsigned char *in, unsigned char *out, | ||
| 58 | size_t len, const void *key, | ||
| 59 | unsigned char ivec[16], cbc128_f cbc) | ||
| 60 | { size_t residue; | ||
| 61 | union { size_t align; unsigned char c[16]; } tmp; | ||
| 62 | |||
| 63 | assert (in && out && key && ivec); | ||
| 64 | |||
| 65 | if (len <= 16) return 0; | ||
| 66 | |||
| 67 | if ((residue=len%16) == 0) residue = 16; | ||
| 68 | |||
| 69 | len -= residue; | ||
| 70 | |||
| 71 | (*cbc)(in,out,len,key,ivec,1); | ||
| 72 | |||
| 73 | in += len; | ||
| 74 | out += len; | ||
| 75 | |||
| 76 | #if defined(CBC_HANDLES_TRUNCATED_IO) | ||
| 77 | memcpy(tmp.c,out-16,16); | ||
| 78 | (*cbc)(in,out-16,residue,key,ivec,1); | ||
| 79 | memcpy(out,tmp.c,residue); | ||
| 80 | #else | ||
| 81 | { | ||
| 82 | size_t n; | ||
| 83 | for (n=0; n<16; n+=sizeof(size_t)) | ||
| 84 | *(size_t *)(tmp.c+n) = 0; | ||
| 85 | memcpy(tmp.c,in,residue); | ||
| 86 | } | ||
| 87 | memcpy(out,out-16,residue); | ||
| 88 | (*cbc)(tmp.c,out-16,16,key,ivec,1); | ||
| 89 | #endif | ||
| 90 | return len+residue; | ||
| 91 | } | ||
| 92 | |||
| 93 | size_t CRYPTO_cts128_decrypt_block(const unsigned char *in, unsigned char *out, | ||
| 94 | size_t len, const void *key, | ||
| 95 | unsigned char ivec[16], block128_f block) | ||
| 96 | { size_t residue, n; | ||
| 97 | union { size_t align; unsigned char c[32]; } tmp; | ||
| 98 | |||
| 99 | assert (in && out && key && ivec); | ||
| 100 | |||
| 101 | if (len<=16) return 0; | ||
| 102 | |||
| 103 | if ((residue=len%16) == 0) residue = 16; | ||
| 104 | |||
| 105 | len -= 16+residue; | ||
| 106 | |||
| 107 | if (len) { | ||
| 108 | CRYPTO_cbc128_decrypt(in,out,len,key,ivec,block); | ||
| 109 | in += len; | ||
| 110 | out += len; | ||
| 111 | } | ||
| 112 | |||
| 113 | (*block)(in,tmp.c+16,key); | ||
| 114 | |||
| 115 | for (n=0; n<16; n+=sizeof(size_t)) | ||
| 116 | *(size_t *)(tmp.c+n) = *(size_t *)(tmp.c+16+n); | ||
| 117 | memcpy(tmp.c,in+16,residue); | ||
| 118 | (*block)(tmp.c,tmp.c,key); | ||
| 119 | |||
| 120 | for(n=0; n<16; ++n) { | ||
| 121 | unsigned char c = in[n]; | ||
| 122 | out[n] = tmp.c[n] ^ ivec[n]; | ||
| 123 | ivec[n] = c; | ||
| 124 | } | ||
| 125 | for(residue+=16; n<residue; ++n) | ||
| 126 | out[n] = tmp.c[n] ^ in[n]; | ||
| 127 | |||
| 128 | return len+residue-16; | ||
| 129 | } | ||
| 130 | |||
| 131 | size_t CRYPTO_cts128_decrypt(const unsigned char *in, unsigned char *out, | ||
| 132 | size_t len, const void *key, | ||
| 133 | unsigned char ivec[16], cbc128_f cbc) | ||
| 134 | { size_t residue, n; | ||
| 135 | union { size_t align; unsigned char c[32]; } tmp; | ||
| 136 | |||
| 137 | assert (in && out && key && ivec); | ||
| 138 | |||
| 139 | if (len<=16) return 0; | ||
| 140 | |||
| 141 | if ((residue=len%16) == 0) residue = 16; | ||
| 142 | |||
| 143 | len -= 16+residue; | ||
| 144 | |||
| 145 | if (len) { | ||
| 146 | (*cbc)(in,out,len,key,ivec,0); | ||
| 147 | in += len; | ||
| 148 | out += len; | ||
| 149 | } | ||
| 150 | |||
| 151 | for (n=16; n<32; n+=sizeof(size_t)) | ||
| 152 | *(size_t *)(tmp.c+n) = 0; | ||
| 153 | /* this places in[16] at &tmp.c[16] and decrypted block at &tmp.c[0] */ | ||
| 154 | (*cbc)(in,tmp.c,16,key,tmp.c+16,0); | ||
| 155 | |||
| 156 | memcpy(tmp.c,in+16,residue); | ||
| 157 | #if defined(CBC_HANDLES_TRUNCATED_IO) | ||
| 158 | (*cbc)(tmp.c,out,16+residue,key,ivec,0); | ||
| 159 | #else | ||
| 160 | (*cbc)(tmp.c,tmp.c,32,key,ivec,0); | ||
| 161 | memcpy(out,tmp.c,16+residue); | ||
| 162 | #endif | ||
| 163 | return len+residue; | ||
| 164 | } | ||
| 165 | |||
| 166 | #if defined(SELFTEST) | ||
| 167 | #include <stdio.h> | ||
| 168 | #include <openssl/aes.h> | ||
| 169 | |||
| 170 | /* test vectors from RFC 3962 */ | ||
| 171 | static const unsigned char test_key[16] = "chicken teriyaki"; | ||
| 172 | static const unsigned char test_input[64] = | ||
| 173 | "I would like the" " General Gau's C" | ||
| 174 | "hicken, please, " "and wonton soup."; | ||
| 175 | static const unsigned char test_iv[16] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}; | ||
| 176 | |||
| 177 | static const unsigned char vector_17[17] = | ||
| 178 | {0xc6,0x35,0x35,0x68,0xf2,0xbf,0x8c,0xb4, 0xd8,0xa5,0x80,0x36,0x2d,0xa7,0xff,0x7f, | ||
| 179 | 0x97}; | ||
| 180 | static const unsigned char vector_31[31] = | ||
| 181 | {0xfc,0x00,0x78,0x3e,0x0e,0xfd,0xb2,0xc1, 0xd4,0x45,0xd4,0xc8,0xef,0xf7,0xed,0x22, | ||
| 182 | 0x97,0x68,0x72,0x68,0xd6,0xec,0xcc,0xc0, 0xc0,0x7b,0x25,0xe2,0x5e,0xcf,0xe5}; | ||
| 183 | static const unsigned char vector_32[32] = | ||
| 184 | {0x39,0x31,0x25,0x23,0xa7,0x86,0x62,0xd5, 0xbe,0x7f,0xcb,0xcc,0x98,0xeb,0xf5,0xa8, | ||
| 185 | 0x97,0x68,0x72,0x68,0xd6,0xec,0xcc,0xc0, 0xc0,0x7b,0x25,0xe2,0x5e,0xcf,0xe5,0x84}; | ||
| 186 | static const unsigned char vector_47[47] = | ||
| 187 | {0x97,0x68,0x72,0x68,0xd6,0xec,0xcc,0xc0, 0xc0,0x7b,0x25,0xe2,0x5e,0xcf,0xe5,0x84, | ||
| 188 | 0xb3,0xff,0xfd,0x94,0x0c,0x16,0xa1,0x8c, 0x1b,0x55,0x49,0xd2,0xf8,0x38,0x02,0x9e, | ||
| 189 | 0x39,0x31,0x25,0x23,0xa7,0x86,0x62,0xd5, 0xbe,0x7f,0xcb,0xcc,0x98,0xeb,0xf5}; | ||
| 190 | static const unsigned char vector_48[48] = | ||
| 191 | {0x97,0x68,0x72,0x68,0xd6,0xec,0xcc,0xc0, 0xc0,0x7b,0x25,0xe2,0x5e,0xcf,0xe5,0x84, | ||
| 192 | 0x9d,0xad,0x8b,0xbb,0x96,0xc4,0xcd,0xc0, 0x3b,0xc1,0x03,0xe1,0xa1,0x94,0xbb,0xd8, | ||
| 193 | 0x39,0x31,0x25,0x23,0xa7,0x86,0x62,0xd5, 0xbe,0x7f,0xcb,0xcc,0x98,0xeb,0xf5,0xa8}; | ||
| 194 | static const unsigned char vector_64[64] = | ||
| 195 | {0x97,0x68,0x72,0x68,0xd6,0xec,0xcc,0xc0, 0xc0,0x7b,0x25,0xe2,0x5e,0xcf,0xe5,0x84, | ||
| 196 | 0x39,0x31,0x25,0x23,0xa7,0x86,0x62,0xd5, 0xbe,0x7f,0xcb,0xcc,0x98,0xeb,0xf5,0xa8, | ||
| 197 | 0x48,0x07,0xef,0xe8,0x36,0xee,0x89,0xa5, 0x26,0x73,0x0d,0xbc,0x2f,0x7b,0xc8,0x40, | ||
| 198 | 0x9d,0xad,0x8b,0xbb,0x96,0xc4,0xcd,0xc0, 0x3b,0xc1,0x03,0xe1,0xa1,0x94,0xbb,0xd8}; | ||
| 199 | |||
| 200 | static AES_KEY encks, decks; | ||
| 201 | |||
| 202 | void test_vector(const unsigned char *vector,size_t len) | ||
| 203 | { unsigned char cleartext[64]; | ||
| 204 | unsigned char iv[sizeof(test_iv)]; | ||
| 205 | unsigned char ciphertext[64]; | ||
| 206 | size_t tail; | ||
| 207 | |||
| 208 | printf("vector_%d\n",len); fflush(stdout); | ||
| 209 | |||
| 210 | if ((tail=len%16) == 0) tail = 16; | ||
| 211 | tail += 16; | ||
| 212 | |||
| 213 | /* test block-based encryption */ | ||
| 214 | memcpy(iv,test_iv,sizeof(test_iv)); | ||
| 215 | CRYPTO_cts128_encrypt_block(test_input,ciphertext,len,&encks,iv,(block128_f)AES_encrypt); | ||
| 216 | if (memcmp(ciphertext,vector,len)) | ||
| 217 | fprintf(stderr,"output_%d mismatch\n",len), exit(1); | ||
| 218 | if (memcmp(iv,vector+len-tail,sizeof(iv))) | ||
| 219 | fprintf(stderr,"iv_%d mismatch\n",len), exit(1); | ||
| 220 | |||
| 221 | /* test block-based decryption */ | ||
| 222 | memcpy(iv,test_iv,sizeof(test_iv)); | ||
| 223 | CRYPTO_cts128_decrypt_block(ciphertext,cleartext,len,&decks,iv,(block128_f)AES_decrypt); | ||
| 224 | if (memcmp(cleartext,test_input,len)) | ||
| 225 | fprintf(stderr,"input_%d mismatch\n",len), exit(2); | ||
| 226 | if (memcmp(iv,vector+len-tail,sizeof(iv))) | ||
| 227 | fprintf(stderr,"iv_%d mismatch\n",len), exit(2); | ||
| 228 | |||
| 229 | /* test streamed encryption */ | ||
| 230 | memcpy(iv,test_iv,sizeof(test_iv)); | ||
| 231 | CRYPTO_cts128_encrypt(test_input,ciphertext,len,&encks,iv,(cbc128_f)AES_cbc_encrypt); | ||
| 232 | if (memcmp(ciphertext,vector,len)) | ||
| 233 | fprintf(stderr,"output_%d mismatch\n",len), exit(3); | ||
| 234 | if (memcmp(iv,vector+len-tail,sizeof(iv))) | ||
| 235 | fprintf(stderr,"iv_%d mismatch\n",len), exit(3); | ||
| 236 | |||
| 237 | /* test streamed decryption */ | ||
| 238 | memcpy(iv,test_iv,sizeof(test_iv)); | ||
| 239 | CRYPTO_cts128_decrypt(ciphertext,cleartext,len,&decks,iv,(cbc128_f)AES_cbc_encrypt); | ||
| 240 | if (memcmp(cleartext,test_input,len)) | ||
| 241 | fprintf(stderr,"input_%d mismatch\n",len), exit(4); | ||
| 242 | if (memcmp(iv,vector+len-tail,sizeof(iv))) | ||
| 243 | fprintf(stderr,"iv_%d mismatch\n",len), exit(4); | ||
| 244 | } | ||
| 245 | |||
| 246 | main() | ||
| 247 | { | ||
| 248 | AES_set_encrypt_key(test_key,128,&encks); | ||
| 249 | AES_set_decrypt_key(test_key,128,&decks); | ||
| 250 | |||
| 251 | test_vector(vector_17,sizeof(vector_17)); | ||
| 252 | test_vector(vector_31,sizeof(vector_31)); | ||
| 253 | test_vector(vector_32,sizeof(vector_32)); | ||
| 254 | test_vector(vector_47,sizeof(vector_47)); | ||
| 255 | test_vector(vector_48,sizeof(vector_48)); | ||
| 256 | test_vector(vector_64,sizeof(vector_64)); | ||
| 257 | exit(0); | ||
| 258 | } | ||
| 259 | #endif | ||
