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