crypto/libressl/crypto/evp/e_idea.c

   1 /* $OpenBSD: e_idea.c,v 1.17 2022/09/15 07:04:19 jsing Exp $ */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 #include <limits.h>
  60 #include <stdio.h>
  61 #include <string.h>
  62
  63 #include <openssl/opensslconf.h>
  64
  65 #ifndef OPENSSL_NO_IDEA
  66
  67 #include <openssl/evp.h>
  68 #include <openssl/idea.h>
  69 #include <openssl/objects.h>
  70
  71 #include "evp_locl.h"
  72
  73 /* NB idea_ecb_encrypt doesn't take an 'encrypt' argument so we treat it as a special
  74  * case
  75  */
  76
  77 static int
  78 idea_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
  79     const unsigned char *iv, int enc)
  80 {
  81         if (!enc) {
  82                 if (EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_OFB_MODE)
  83                         enc = 1;
  84                 else if (EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_CFB_MODE)
  85                         enc = 1;
  86         }
  87         if (enc)
  88                 idea_set_encrypt_key(key, ctx->cipher_data);
  89         else {
  90                 IDEA_KEY_SCHEDULE tmp;
  91
  92                 idea_set_encrypt_key(key, &tmp);
  93                 idea_set_decrypt_key(&tmp, ctx->cipher_data);
  94                 explicit_bzero((unsigned char *)&tmp,
  95                     sizeof(IDEA_KEY_SCHEDULE));
  96         }
  97         return 1;
  98 }
  99
 100 static int
 101 idea_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 102     const unsigned char *in, size_t inl)
 103 {
 104         size_t i, bl;
 105
 106         bl = ctx->cipher->block_size;
 107
 108         if (inl < bl)
 109                 return 1;
 110
 111         inl -= bl;
 112
 113         for (i = 0; i <= inl; i += bl)
 114                 idea_ecb_encrypt(in + i, out + i, ctx->cipher_data);
 115
 116         return 1;
 117 }
 118
 119 typedef struct {
 120         IDEA_KEY_SCHEDULE ks;
 121 } EVP_IDEA_KEY;
 122
 123 static int
 124 idea_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl)
 125 {
 126         size_t chunk = LONG_MAX & ~0xff;
 127
 128         while (inl >= chunk) {
 129                 idea_cbc_encrypt(in, out, (long)chunk, &((EVP_IDEA_KEY *)ctx->cipher_data)->ks, ctx->iv, ctx->encrypt);
 130                 inl -= chunk;
 131                 in += chunk;
 132                 out += chunk;
 133         }
 134
 135         if (inl)
 136                 idea_cbc_encrypt(in, out, (long)inl, &((EVP_IDEA_KEY *)ctx->cipher_data)->ks, ctx->iv, ctx->encrypt);
 137
 138         return 1;
 139 }
 140
 141 static int
 142 idea_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl)
 143 {
 144         size_t chunk = LONG_MAX & ~0xff;
 145
 146         while (inl >= chunk) {
 147                 idea_ofb64_encrypt(in, out, (long)chunk, &((EVP_IDEA_KEY *)ctx->cipher_data)->ks, ctx->iv, &ctx->num);
 148                 inl -= chunk;
 149                 in += chunk;
 150                 out += chunk;
 151         }
 152
 153         if (inl)
 154                 idea_ofb64_encrypt(in, out, (long)inl, &((EVP_IDEA_KEY *)ctx->cipher_data)->ks, ctx->iv, &ctx->num);
 155
 156         return 1;
 157 }
 158
 159 static int
 160 idea_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl)
 161 {
 162         size_t chunk = LONG_MAX & ~0xff;
 163
 164         if (inl < chunk)
 165                 chunk = inl;
 166
 167         while (inl && inl >= chunk) {
 168                 idea_cfb64_encrypt(in, out, (long)chunk, &((EVP_IDEA_KEY *)ctx->cipher_data)->ks, ctx->iv, &ctx->num, ctx->encrypt);
 169                 inl -= chunk;
 170                 in += chunk;
 171                 out += chunk;
 172                 if (inl < chunk)
 173                         chunk = inl;
 174         }
 175
 176         return 1;
 177 }
 178
 179 static const EVP_CIPHER idea_cbc = {
 180         .nid = NID_idea_cbc,
 181         .block_size = 8,
 182         .key_len = 16,
 183         .iv_len = 8,
 184         .flags = 0 | EVP_CIPH_CBC_MODE,
 185         .init = idea_init_key,
 186         .do_cipher = idea_cbc_cipher,
 187         .cleanup = NULL,
 188         .ctx_size = sizeof(IDEA_KEY_SCHEDULE),
 189         .set_asn1_parameters = EVP_CIPHER_set_asn1_iv,
 190         .get_asn1_parameters = EVP_CIPHER_get_asn1_iv,
 191         .ctrl = NULL,
 192         .app_data = NULL,
 193 };
 194
 195 const EVP_CIPHER *
 196 EVP_idea_cbc(void)
 197 {
 198         return &idea_cbc;
 199 }
 200
 201 static const EVP_CIPHER idea_cfb64 = {
 202         .nid = NID_idea_cfb64,
 203         .block_size = 1,
 204         .key_len = 16,
 205         .iv_len = 8,
 206         .flags = 0 | EVP_CIPH_CFB_MODE,
 207         .init = idea_init_key,
 208         .do_cipher = idea_cfb64_cipher,
 209         .cleanup = NULL,
 210         .ctx_size = sizeof(IDEA_KEY_SCHEDULE),
 211         .set_asn1_parameters = EVP_CIPHER_set_asn1_iv,
 212         .get_asn1_parameters = EVP_CIPHER_get_asn1_iv,
 213         .ctrl = NULL,
 214         .app_data = NULL,
 215 };
 216
 217 const EVP_CIPHER *
 218 EVP_idea_cfb64(void)
 219 {
 220         return &idea_cfb64;
 221 }
 222
 223 static const EVP_CIPHER idea_ofb = {
 224         .nid = NID_idea_ofb64,
 225         .block_size = 1,
 226         .key_len = 16,
 227         .iv_len = 8,
 228         .flags = 0 | EVP_CIPH_OFB_MODE,
 229         .init = idea_init_key,
 230         .do_cipher = idea_ofb_cipher,
 231         .cleanup = NULL,
 232         .ctx_size = sizeof(IDEA_KEY_SCHEDULE),
 233         .set_asn1_parameters = EVP_CIPHER_set_asn1_iv,
 234         .get_asn1_parameters = EVP_CIPHER_get_asn1_iv,
 235         .ctrl = NULL,
 236         .app_data = NULL,
 237 };
 238
 239 const EVP_CIPHER *
 240 EVP_idea_ofb(void)
 241 {
 242         return &idea_ofb;
 243 }
 244
 245 static const EVP_CIPHER idea_ecb = {
 246         .nid = NID_idea_ecb,
 247         .block_size = 8,
 248         .key_len = 16,
 249         .iv_len = 0,
 250         .flags = 0 | EVP_CIPH_ECB_MODE,
 251         .init = idea_init_key,
 252         .do_cipher = idea_ecb_cipher,
 253         .cleanup = NULL,
 254         .ctx_size = sizeof(IDEA_KEY_SCHEDULE),
 255         .set_asn1_parameters = EVP_CIPHER_set_asn1_iv,
 256         .get_asn1_parameters = EVP_CIPHER_get_asn1_iv,
 257         .ctrl = NULL,
 258         .app_data = NULL,
 259 };
 260
 261 const EVP_CIPHER *
 262 EVP_idea_ecb(void)
 263 {
 264         return &idea_ecb;
 265 }
 266 #endif