crypto/evp/e_camellia.c

   1 /*
   2  * Copyright 2006-2018 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 /*
  11  * Camellia low level APIs are deprecated for public use, but still ok for
  12  * internal use.
  13  */
  14 #include "internal/deprecated.h"
  15
  16 #include <openssl/opensslconf.h>
  17 #ifdef OPENSSL_NO_CAMELLIA
  18 NON_EMPTY_TRANSLATION_UNIT
  19 #else
  20
  21 # include <openssl/evp.h>
  22 # include <openssl/err.h>
  23 # include <string.h>
  24 # include <assert.h>
  25 # include <openssl/camellia.h>
  26 # include "crypto/evp.h"
  27 # include "crypto/modes.h"
  28 # include "crypto/cmll_platform.h"
  29
  30 static int camellia_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
  31                              const unsigned char *iv, int enc);
  32
  33 /* Camellia subkey Structure */
  34 typedef struct {
  35     CAMELLIA_KEY ks;
  36     block128_f block;
  37     union {
  38         cbc128_f cbc;
  39         ctr128_f ctr;
  40     } stream;
  41 } EVP_CAMELLIA_KEY;
  42
  43 # define MAXBITCHUNK     ((size_t)1<<(sizeof(size_t)*8-4))
  44
  45 /* Attribute operation for Camellia */
  46 # define data(ctx)       EVP_C_DATA(EVP_CAMELLIA_KEY,ctx)
  47
  48 # if defined(AES_ASM) && (defined(__sparc) || defined(__sparc__))
  49 /* ---------^^^ this is not a typo, just a way to detect that
  50  * assembler support was in general requested... */
  51 #  include "sparc_arch.h"
  52
  53
  54 static int cmll_t4_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
  55                             const unsigned char *iv, int enc)
  56 {
  57     int ret, mode, bits;
  58     EVP_CAMELLIA_KEY *dat =
  59         (EVP_CAMELLIA_KEY *)EVP_CIPHER_CTX_get_cipher_data(ctx);
  60
  61     mode = EVP_CIPHER_CTX_mode(ctx);
  62     bits = EVP_CIPHER_CTX_key_length(ctx) * 8;
  63
  64     cmll_t4_set_key(key, bits, &dat->ks);
  65
  66     if ((mode == EVP_CIPH_ECB_MODE || mode == EVP_CIPH_CBC_MODE)
  67         && !enc) {
  68         ret = 0;
  69         dat->block = (block128_f) cmll_t4_decrypt;
  70         switch (bits) {
  71         case 128:
  72             dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ?
  73                 (cbc128_f) cmll128_t4_cbc_decrypt : NULL;
  74             break;
  75         case 192:
  76         case 256:
  77             dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ?
  78                 (cbc128_f) cmll256_t4_cbc_decrypt : NULL;
  79             break;
  80         default:
  81             ret = -1;
  82         }
  83     } else {
  84         ret = 0;
  85         dat->block = (block128_f) cmll_t4_encrypt;
  86         switch (bits) {
  87         case 128:
  88             if (mode == EVP_CIPH_CBC_MODE)
  89                 dat->stream.cbc = (cbc128_f) cmll128_t4_cbc_encrypt;
  90             else if (mode == EVP_CIPH_CTR_MODE)
  91                 dat->stream.ctr = (ctr128_f) cmll128_t4_ctr32_encrypt;
  92             else
  93                 dat->stream.cbc = NULL;
  94             break;
  95         case 192:
  96         case 256:
  97             if (mode == EVP_CIPH_CBC_MODE)
  98                 dat->stream.cbc = (cbc128_f) cmll256_t4_cbc_encrypt;
  99             else if (mode == EVP_CIPH_CTR_MODE)
 100                 dat->stream.ctr = (ctr128_f) cmll256_t4_ctr32_encrypt;
 101             else
 102                 dat->stream.cbc = NULL;
 103             break;
 104         default:
 105             ret = -1;
 106         }
 107     }
 108
 109     if (ret < 0) {
 110         EVPerr(EVP_F_CMLL_T4_INIT_KEY, EVP_R_CAMELLIA_KEY_SETUP_FAILED);
 111         return 0;
 112     }
 113
 114     return 1;
 115 }
 116
 117 #  define cmll_t4_cbc_cipher camellia_cbc_cipher
 118 static int cmll_t4_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 119                               const unsigned char *in, size_t len);
 120
 121 #  define cmll_t4_ecb_cipher camellia_ecb_cipher
 122 static int cmll_t4_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 123                               const unsigned char *in, size_t len);
 124
 125 #  define cmll_t4_ofb_cipher camellia_ofb_cipher
 126 static int cmll_t4_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 127                               const unsigned char *in, size_t len);
 128
 129 #  define cmll_t4_cfb_cipher camellia_cfb_cipher
 130 static int cmll_t4_cfb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 131                               const unsigned char *in, size_t len);
 132
 133 #  define cmll_t4_cfb8_cipher camellia_cfb8_cipher
 134 static int cmll_t4_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 135                                const unsigned char *in, size_t len);
 136
 137 #  define cmll_t4_cfb1_cipher camellia_cfb1_cipher
 138 static int cmll_t4_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 139                                const unsigned char *in, size_t len);
 140
 141 #  define cmll_t4_ctr_cipher camellia_ctr_cipher
 142 static int cmll_t4_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 143                               const unsigned char *in, size_t len);
 144
 145 #  define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \
 146 static const EVP_CIPHER cmll_t4_##keylen##_##mode = { \
 147         nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \
 148         flags|EVP_CIPH_##MODE##_MODE,   \
 149         cmll_t4_init_key,               \
 150         cmll_t4_##mode##_cipher,        \
 151         NULL,                           \
 152         sizeof(EVP_CAMELLIA_KEY),       \
 153         NULL,NULL,NULL,NULL }; \
 154 static const EVP_CIPHER camellia_##keylen##_##mode = { \
 155         nid##_##keylen##_##nmode,blocksize,     \
 156         keylen/8,ivlen, \
 157         flags|EVP_CIPH_##MODE##_MODE,   \
 158         camellia_init_key,              \
 159         camellia_##mode##_cipher,       \
 160         NULL,                           \
 161         sizeof(EVP_CAMELLIA_KEY),       \
 162         NULL,NULL,NULL,NULL }; \
 163 const EVP_CIPHER *EVP_camellia_##keylen##_##mode(void) \
 164 { return SPARC_CMLL_CAPABLE?&cmll_t4_##keylen##_##mode:&camellia_##keylen##_##mode; }
 165
 166 # else
 167
 168 #  define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \
 169 static const EVP_CIPHER camellia_##keylen##_##mode = { \
 170         nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \
 171         flags|EVP_CIPH_##MODE##_MODE,   \
 172         camellia_init_key,              \
 173         camellia_##mode##_cipher,       \
 174         NULL,                           \
 175         sizeof(EVP_CAMELLIA_KEY),       \
 176         NULL,NULL,NULL,NULL }; \
 177 const EVP_CIPHER *EVP_camellia_##keylen##_##mode(void) \
 178 { return &camellia_##keylen##_##mode; }
 179
 180 # endif
 181
 182 # define BLOCK_CIPHER_generic_pack(nid,keylen,flags)             \
 183         BLOCK_CIPHER_generic(nid,keylen,16,16,cbc,cbc,CBC,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)     \
 184         BLOCK_CIPHER_generic(nid,keylen,16,0,ecb,ecb,ECB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)      \
 185         BLOCK_CIPHER_generic(nid,keylen,1,16,ofb128,ofb,OFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)   \
 186         BLOCK_CIPHER_generic(nid,keylen,1,16,cfb128,cfb,CFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)   \
 187         BLOCK_CIPHER_generic(nid,keylen,1,16,cfb1,cfb1,CFB,flags)       \
 188         BLOCK_CIPHER_generic(nid,keylen,1,16,cfb8,cfb8,CFB,flags)       \
 189         BLOCK_CIPHER_generic(nid, keylen, 1, 16, ctr, ctr, CTR, flags)
 190
 191 /* The subkey for Camellia is generated. */
 192 static int camellia_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 193                              const unsigned char *iv, int enc)
 194 {
 195     int ret, mode;
 196     EVP_CAMELLIA_KEY *dat = EVP_C_DATA(EVP_CAMELLIA_KEY,ctx);
 197
 198     ret = Camellia_set_key(key, EVP_CIPHER_CTX_key_length(ctx) * 8, &dat->ks);
 199     if (ret < 0) {
 200         EVPerr(EVP_F_CAMELLIA_INIT_KEY, EVP_R_CAMELLIA_KEY_SETUP_FAILED);
 201         return 0;
 202     }
 203
 204     mode = EVP_CIPHER_CTX_mode(ctx);
 205     if ((mode == EVP_CIPH_ECB_MODE || mode == EVP_CIPH_CBC_MODE)
 206         && !enc) {
 207         dat->block = (block128_f) Camellia_decrypt;
 208         dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ?
 209             (cbc128_f) Camellia_cbc_encrypt : NULL;
 210     } else {
 211         dat->block = (block128_f) Camellia_encrypt;
 212         dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ?
 213             (cbc128_f) Camellia_cbc_encrypt : NULL;
 214     }
 215
 216     return 1;
 217 }
 218
 219 static int camellia_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 220                                const unsigned char *in, size_t len)
 221 {
 222     EVP_CAMELLIA_KEY *dat = EVP_C_DATA(EVP_CAMELLIA_KEY,ctx);
 223
 224     if (dat->stream.cbc)
 225         (*dat->stream.cbc) (in, out, len, &dat->ks,
 226                             EVP_CIPHER_CTX_iv_noconst(ctx),
 227                             EVP_CIPHER_CTX_encrypting(ctx));
 228     else if (EVP_CIPHER_CTX_encrypting(ctx))
 229         CRYPTO_cbc128_encrypt(in, out, len, &dat->ks,
 230                               EVP_CIPHER_CTX_iv_noconst(ctx), dat->block);
 231     else
 232         CRYPTO_cbc128_decrypt(in, out, len, &dat->ks,
 233                               EVP_CIPHER_CTX_iv_noconst(ctx), dat->block);
 234
 235     return 1;
 236 }
 237
 238 static int camellia_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 239                                const unsigned char *in, size_t len)
 240 {
 241     size_t bl = EVP_CIPHER_CTX_block_size(ctx);
 242     size_t i;
 243     EVP_CAMELLIA_KEY *dat = EVP_C_DATA(EVP_CAMELLIA_KEY,ctx);
 244
 245     if (len < bl)
 246         return 1;
 247
 248     for (i = 0, len -= bl; i <= len; i += bl)
 249         (*dat->block) (in + i, out + i, &dat->ks);
 250
 251     return 1;
 252 }
 253
 254 static int camellia_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 255                                const unsigned char *in, size_t len)
 256 {
 257     EVP_CAMELLIA_KEY *dat = EVP_C_DATA(EVP_CAMELLIA_KEY,ctx);
 258
 259     int num = EVP_CIPHER_CTX_num(ctx);
 260     CRYPTO_ofb128_encrypt(in, out, len, &dat->ks,
 261                           EVP_CIPHER_CTX_iv_noconst(ctx), &num, dat->block);
 262     EVP_CIPHER_CTX_set_num(ctx, num);
 263     return 1;
 264 }
 265
 266 static int camellia_cfb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 267                                const unsigned char *in, size_t len)
 268 {
 269     EVP_CAMELLIA_KEY *dat = EVP_C_DATA(EVP_CAMELLIA_KEY,ctx);
 270
 271     int num = EVP_CIPHER_CTX_num(ctx);
 272     CRYPTO_cfb128_encrypt(in, out, len, &dat->ks,
 273                           EVP_CIPHER_CTX_iv_noconst(ctx), &num, EVP_CIPHER_CTX_encrypting(ctx), dat->block);
 274     EVP_CIPHER_CTX_set_num(ctx, num);
 275     return 1;
 276 }
 277
 278 static int camellia_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 279                                 const unsigned char *in, size_t len)
 280 {
 281     EVP_CAMELLIA_KEY *dat = EVP_C_DATA(EVP_CAMELLIA_KEY,ctx);
 282
 283     int num = EVP_CIPHER_CTX_num(ctx);
 284     CRYPTO_cfb128_8_encrypt(in, out, len, &dat->ks,
 285                             EVP_CIPHER_CTX_iv_noconst(ctx), &num, EVP_CIPHER_CTX_encrypting(ctx), dat->block);
 286     EVP_CIPHER_CTX_set_num(ctx, num);
 287     return 1;
 288 }
 289
 290 static int camellia_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 291                                 const unsigned char *in, size_t len)
 292 {
 293     EVP_CAMELLIA_KEY *dat = EVP_C_DATA(EVP_CAMELLIA_KEY,ctx);
 294
 295     if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS)) {
 296         int num = EVP_CIPHER_CTX_num(ctx);
 297         CRYPTO_cfb128_1_encrypt(in, out, len, &dat->ks,
 298                                 EVP_CIPHER_CTX_iv_noconst(ctx), &num, EVP_CIPHER_CTX_encrypting(ctx), dat->block);
 299         EVP_CIPHER_CTX_set_num(ctx, num);
 300         return 1;
 301     }
 302
 303     while (len >= MAXBITCHUNK) {
 304         int num = EVP_CIPHER_CTX_num(ctx);
 305         CRYPTO_cfb128_1_encrypt(in, out, MAXBITCHUNK * 8, &dat->ks,
 306                                 EVP_CIPHER_CTX_iv_noconst(ctx), &num, EVP_CIPHER_CTX_encrypting(ctx), dat->block);
 307         EVP_CIPHER_CTX_set_num(ctx, num);
 308         len -= MAXBITCHUNK;
 309         out += MAXBITCHUNK;
 310         in  += MAXBITCHUNK;
 311     }
 312     if (len) {
 313         int num = EVP_CIPHER_CTX_num(ctx);
 314         CRYPTO_cfb128_1_encrypt(in, out, len * 8, &dat->ks,
 315                                 EVP_CIPHER_CTX_iv_noconst(ctx), &num, EVP_CIPHER_CTX_encrypting(ctx), dat->block);
 316         EVP_CIPHER_CTX_set_num(ctx, num);
 317     }
 318
 319     return 1;
 320 }
 321
 322 static int camellia_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 323                                const unsigned char *in, size_t len)
 324 {
 325     unsigned int num = EVP_CIPHER_CTX_num(ctx);
 326     EVP_CAMELLIA_KEY *dat = EVP_C_DATA(EVP_CAMELLIA_KEY,ctx);
 327
 328     if (dat->stream.ctr)
 329         CRYPTO_ctr128_encrypt_ctr32(in, out, len, &dat->ks,
 330                                     EVP_CIPHER_CTX_iv_noconst(ctx),
 331                                     EVP_CIPHER_CTX_buf_noconst(ctx), &num,
 332                                     dat->stream.ctr);
 333     else
 334         CRYPTO_ctr128_encrypt(in, out, len, &dat->ks,
 335                               EVP_CIPHER_CTX_iv_noconst(ctx),
 336                               EVP_CIPHER_CTX_buf_noconst(ctx), &num,
 337                               dat->block);
 338     EVP_CIPHER_CTX_set_num(ctx, num);
 339     return 1;
 340 }
 341
 342 BLOCK_CIPHER_generic_pack(NID_camellia, 128, 0)
 343     BLOCK_CIPHER_generic_pack(NID_camellia, 192, 0)
 344     BLOCK_CIPHER_generic_pack(NID_camellia, 256, 0)
 345 #endif