1: /* test/igetest.c -*- mode:C; c-file-style: "eay" -*- */
    2: /* ====================================================================
    3:  * Copyright (c) 2006 The OpenSSL Project.  All rights reserved.
    4:  *
    5:  * Redistribution and use in source and binary forms, with or without
    6:  * modification, are permitted provided that the following conditions
    7:  * are met:
    8:  *
    9:  * 1. Redistributions of source code must retain the above copyright
   10:  *    notice, this list of conditions and the following disclaimer. 
   11:  *
   12:  * 2. Redistributions in binary form must reproduce the above copyright
   13:  *    notice, this list of conditions and the following disclaimer in
   14:  *    the documentation and/or other materials provided with the
   15:  *    distribution.
   16:  *
   17:  * 3. All advertising materials mentioning features or use of this
   18:  *    software must display the following acknowledgment:
   19:  *    "This product includes software developed by the OpenSSL Project
   20:  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
   21:  *
   22:  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
   23:  *    endorse or promote products derived from this software without
   24:  *    prior written permission. For written permission, please contact
   25:  *    openssl-core@openssl.org.
   26:  *
   27:  * 5. Products derived from this software may not be called "OpenSSL"
   28:  *    nor may "OpenSSL" appear in their names without prior written
   29:  *    permission of the OpenSSL Project.
   30:  *
   31:  * 6. Redistributions of any form whatsoever must retain the following
   32:  *    acknowledgment:
   33:  *    "This product includes software developed by the OpenSSL Project
   34:  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
   35:  *
   36:  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
   37:  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   38:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   39:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
   40:  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   41:  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   42:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   43:  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   44:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
   45:  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   46:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
   47:  * OF THE POSSIBILITY OF SUCH DAMAGE.
   48:  * ====================================================================
   49:  *
   50:  */
   51: 
   52: #include <openssl/aes.h>
   53: #include <openssl/rand.h>
   54: #include <stdio.h>
   55: #include <string.h>
   56: #include <assert.h>
   57: 
   58: #define TEST_SIZE       128
   59: #define BIG_TEST_SIZE 10240
   60: 
   61: static void hexdump(FILE *f,const char *title,const unsigned char *s,int l)
   62:     {
   63:     int n=0;
   64: 
   65:     fprintf(f,"%s",title);
   66:     for( ; n < l ; ++n)
   67:                 {
   68:                 if((n%16) == 0)
   69:                         fprintf(f,"\n%04x",n);
   70:                 fprintf(f," %02x",s[n]);
   71:                 }
   72:     fprintf(f,"\n");
   73:     }
   74: 
   75: #define MAX_VECTOR_SIZE 64
   76: 
   77: struct ige_test
   78:         {
   79:         const unsigned char key[16];
   80:         const unsigned char iv[32];
   81:         const unsigned char in[MAX_VECTOR_SIZE];
   82:         const unsigned char out[MAX_VECTOR_SIZE];
   83:         const size_t length;
   84:         const int encrypt;
   85:         };
   86: 
   87: static struct ige_test const ige_test_vectors[] = {
   88: { { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
   89:     0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f }, /* key */
   90:   { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
   91:     0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
   92:     0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
   93:     0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f }, /* iv */
   94:   { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   95:     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   96:     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   97:     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, /* in */
   98:   { 0x1a, 0x85, 0x19, 0xa6, 0x55, 0x7b, 0xe6, 0x52,
   99:     0xe9, 0xda, 0x8e, 0x43, 0xda, 0x4e, 0xf4, 0x45,
  100:     0x3c, 0xf4, 0x56, 0xb4, 0xca, 0x48, 0x8a, 0xa3,
  101:     0x83, 0xc7, 0x9c, 0x98, 0xb3, 0x47, 0x97, 0xcb }, /* out */
  102:   32, AES_ENCRYPT }, /* test vector 0 */
  103: 
  104: { { 0x54, 0x68, 0x69, 0x73, 0x20, 0x69, 0x73, 0x20,
  105:     0x61, 0x6e, 0x20, 0x69, 0x6d, 0x70, 0x6c, 0x65 }, /* key */
  106:   { 0x6d, 0x65, 0x6e, 0x74, 0x61, 0x74, 0x69, 0x6f,
  107:     0x6e, 0x20, 0x6f, 0x66, 0x20, 0x49, 0x47, 0x45,
  108:     0x20, 0x6d, 0x6f, 0x64, 0x65, 0x20, 0x66, 0x6f,
  109:     0x72, 0x20, 0x4f, 0x70, 0x65, 0x6e, 0x53, 0x53 }, /* iv */
  110:   { 0x4c, 0x2e, 0x20, 0x4c, 0x65, 0x74, 0x27, 0x73,
  111:     0x20, 0x68, 0x6f, 0x70, 0x65, 0x20, 0x42, 0x65,
  112:     0x6e, 0x20, 0x67, 0x6f, 0x74, 0x20, 0x69, 0x74,
  113:     0x20, 0x72, 0x69, 0x67, 0x68, 0x74, 0x21, 0x0a }, /* in */
  114:   { 0x99, 0x70, 0x64, 0x87, 0xa1, 0xcd, 0xe6, 0x13,
  115:     0xbc, 0x6d, 0xe0, 0xb6, 0xf2, 0x4b, 0x1c, 0x7a,
  116:     0xa4, 0x48, 0xc8, 0xb9, 0xc3, 0x40, 0x3e, 0x34,
  117:     0x67, 0xa8, 0xca, 0xd8, 0x93, 0x40, 0xf5, 0x3b }, /* out */
  118:   32, AES_DECRYPT }, /* test vector 1 */
  119: };
  120: 
  121: struct bi_ige_test
  122:         {
  123:         const unsigned char key1[32];
  124:         const unsigned char key2[32];
  125:         const unsigned char iv[64];
  126:         const unsigned char in[MAX_VECTOR_SIZE];
  127:         const unsigned char out[MAX_VECTOR_SIZE];
  128:         const size_t keysize;
  129:         const size_t length;
  130:         const int encrypt;
  131:         };
  132: 
  133: static struct bi_ige_test const bi_ige_test_vectors[] = {
  134: { { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
  135:     0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f }, /* key1 */
  136:   { 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
  137:     0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f }, /* key2 */
  138:   { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
  139:     0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
  140:     0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
  141:     0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
  142:     0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
  143:     0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
  144:     0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
  145:     0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f }, /* iv */
  146:   { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  147:     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  148:     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  149:     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, /* in */
  150:   { 0x14, 0x40, 0x6f, 0xae, 0xa2, 0x79, 0xf2, 0x56,
  151:         0x1f, 0x86, 0xeb, 0x3b, 0x7d, 0xff, 0x53, 0xdc,
  152:         0x4e, 0x27, 0x0c, 0x03, 0xde, 0x7c, 0xe5, 0x16,
  153:         0x6a, 0x9c, 0x20, 0x33, 0x9d, 0x33, 0xfe, 0x12 }, /* out */
  154:   16, 32, AES_ENCRYPT }, /* test vector 0 */
  155: { { 0x58, 0x0a, 0x06, 0xe9, 0x97, 0x07, 0x59, 0x5c,
  156:         0x9e, 0x19, 0xd2, 0xa7, 0xbb, 0x40, 0x2b, 0x7a,
  157:         0xc7, 0xd8, 0x11, 0x9e, 0x4c, 0x51, 0x35, 0x75,
  158:         0x64, 0x28, 0x0f, 0x23, 0xad, 0x74, 0xac, 0x37 }, /* key1 */
  159:   { 0xd1, 0x80, 0xa0, 0x31, 0x47, 0xa3, 0x11, 0x13,
  160:         0x86, 0x26, 0x9e, 0x6d, 0xff, 0xaf, 0x72, 0x74,
  161:         0x5b, 0xa2, 0x35, 0x81, 0xd2, 0xa6, 0x3d, 0x21,
  162:         0x67, 0x7b, 0x58, 0xa8, 0x18, 0xf9, 0x72, 0xe4 }, /* key2 */
  163:   { 0x80, 0x3d, 0xbd, 0x4c, 0xe6, 0x7b, 0x06, 0xa9,
  164:         0x53, 0x35, 0xd5, 0x7e, 0x71, 0xc1, 0x70, 0x70,
  165:         0x74, 0x9a, 0x00, 0x28, 0x0c, 0xbf, 0x6c, 0x42,
  166:         0x9b, 0xa4, 0xdd, 0x65, 0x11, 0x77, 0x7c, 0x67,
  167:         0xfe, 0x76, 0x0a, 0xf0, 0xd5, 0xc6, 0x6e, 0x6a,
  168:         0xe7, 0x5e, 0x4c, 0xf2, 0x7e, 0x9e, 0xf9, 0x20,
  169:         0x0e, 0x54, 0x6f, 0x2d, 0x8a, 0x8d, 0x7e, 0xbd,
  170:         0x48, 0x79, 0x37, 0x99, 0xff, 0x27, 0x93, 0xa3 }, /* iv */
  171:   { 0xf1, 0x54, 0x3d, 0xca, 0xfe, 0xb5, 0xef, 0x1c,
  172:         0x4f, 0xa6, 0x43, 0xf6, 0xe6, 0x48, 0x57, 0xf0,
  173:         0xee, 0x15, 0x7f, 0xe3, 0xe7, 0x2f, 0xd0, 0x2f,
  174:         0x11, 0x95, 0x7a, 0x17, 0x00, 0xab, 0xa7, 0x0b,
  175:         0xbe, 0x44, 0x09, 0x9c, 0xcd, 0xac, 0xa8, 0x52,
  176:         0xa1, 0x8e, 0x7b, 0x75, 0xbc, 0xa4, 0x92, 0x5a,
  177:         0xab, 0x46, 0xd3, 0x3a, 0xa0, 0xd5, 0x35, 0x1c,
  178:         0x55, 0xa4, 0xb3, 0xa8, 0x40, 0x81, 0xa5, 0x0b}, /* in */
  179:   { 0x42, 0xe5, 0x28, 0x30, 0x31, 0xc2, 0xa0, 0x23,
  180:         0x68, 0x49, 0x4e, 0xb3, 0x24, 0x59, 0x92, 0x79,
  181:         0xc1, 0xa5, 0xcc, 0xe6, 0x76, 0x53, 0xb1, 0xcf,
  182:         0x20, 0x86, 0x23, 0xe8, 0x72, 0x55, 0x99, 0x92,
  183:         0x0d, 0x16, 0x1c, 0x5a, 0x2f, 0xce, 0xcb, 0x51,
  184:         0xe2, 0x67, 0xfa, 0x10, 0xec, 0xcd, 0x3d, 0x67,
  185:         0xa5, 0xe6, 0xf7, 0x31, 0x26, 0xb0, 0x0d, 0x76,
  186:         0x5e, 0x28, 0xdc, 0x7f, 0x01, 0xc5, 0xa5, 0x4c}, /* out */
  187:   32, 64, AES_ENCRYPT }, /* test vector 1 */
  188: 
  189: };
  190: 
  191: static int run_test_vectors(void)
  192:         {
  193:         int n;
  194:         int errs = 0;
  195: 
  196:         for(n=0 ; n < sizeof(ige_test_vectors)/sizeof(ige_test_vectors[0]) ; ++n)
  197:                 {
  198:                 const struct ige_test * const v = &ige_test_vectors[n];
  199:                 AES_KEY key;
  200:                 unsigned char buf[MAX_VECTOR_SIZE];
  201:                 unsigned char iv[AES_BLOCK_SIZE*2];
  202: 
  203:                 assert(v->length <= MAX_VECTOR_SIZE);
  204: 
  205:                 if(v->encrypt == AES_ENCRYPT)
  206:                         AES_set_encrypt_key(v->key, 8*sizeof v->key, &key);
  207:                 else
  208:                         AES_set_decrypt_key(v->key, 8*sizeof v->key, &key);
  209:                 memcpy(iv, v->iv, sizeof iv);
  210:                 AES_ige_encrypt(v->in, buf, v->length, &key, iv, v->encrypt);
  211: 
  212:                 if(memcmp(v->out, buf, v->length))
  213:                         {
  214:                         printf("IGE test vector %d failed\n", n);
  215:                         hexdump(stdout, "key", v->key, sizeof v->key);
  216:                         hexdump(stdout, "iv", v->iv, sizeof v->iv);
  217:                         hexdump(stdout, "in", v->in, v->length);
  218:                         hexdump(stdout, "expected", v->out, v->length);
  219:                         hexdump(stdout, "got", buf, v->length);
  220: 
  221:                         ++errs;
  222:                         }
  223: 
  224:                 /* try with in == out */
  225:                 memcpy(iv, v->iv, sizeof iv);
  226:                 memcpy(buf, v->in, v->length);
  227:                 AES_ige_encrypt(buf, buf, v->length, &key, iv, v->encrypt);
  228: 
  229:                 if(memcmp(v->out, buf, v->length))
  230:                         {
  231:                         printf("IGE test vector %d failed (with in == out)\n", n);
  232:                         hexdump(stdout, "key", v->key, sizeof v->key);
  233:                         hexdump(stdout, "iv", v->iv, sizeof v->iv);
  234:                         hexdump(stdout, "in", v->in, v->length);
  235:                         hexdump(stdout, "expected", v->out, v->length);
  236:                         hexdump(stdout, "got", buf, v->length);
  237: 
  238:                         ++errs;
  239:                         }
  240:                 }
  241: 
  242:         for(n=0 ; n < sizeof(bi_ige_test_vectors)/sizeof(bi_ige_test_vectors[0])
  243:                         ; ++n)
  244:                 {
  245:                 const struct bi_ige_test * const v = &bi_ige_test_vectors[n];
  246:                 AES_KEY key1;
  247:                 AES_KEY key2;
  248:                 unsigned char buf[MAX_VECTOR_SIZE];
  249: 
  250:                 assert(v->length <= MAX_VECTOR_SIZE);
  251: 
  252:                 if(v->encrypt == AES_ENCRYPT)
  253:                         {
  254:                         AES_set_encrypt_key(v->key1, 8*v->keysize, &key1);
  255:                         AES_set_encrypt_key(v->key2, 8*v->keysize, &key2);
  256:                         }
  257:                 else
  258:                         {
  259:                         AES_set_decrypt_key(v->key1, 8*v->keysize, &key1);
  260:                         AES_set_decrypt_key(v->key2, 8*v->keysize, &key2);
  261:                         }
  262: 
  263:                 AES_bi_ige_encrypt(v->in, buf, v->length, &key1, &key2, v->iv,
  264:                                                    v->encrypt);
  265: 
  266:                 if(memcmp(v->out, buf, v->length))
  267:                         {
  268:                         printf("Bidirectional IGE test vector %d failed\n", n);
  269:                         hexdump(stdout, "key 1", v->key1, sizeof v->key1);
  270:                         hexdump(stdout, "key 2", v->key2, sizeof v->key2);
  271:                         hexdump(stdout, "iv", v->iv, sizeof v->iv);
  272:                         hexdump(stdout, "in", v->in, v->length);
  273:                         hexdump(stdout, "expected", v->out, v->length);
  274:                         hexdump(stdout, "got", buf, v->length);
  275: 
  276:                         ++errs;
  277:                         }
  278:                 }
  279: 
  280:         return errs;
  281:         }
  282: 
  283: int main(int argc, char **argv)
  284:         {
  285:         unsigned char rkey[16];
  286:         unsigned char rkey2[16];
  287:         AES_KEY key;
  288:         AES_KEY key2;
  289:         unsigned char plaintext[BIG_TEST_SIZE];
  290:         unsigned char ciphertext[BIG_TEST_SIZE];
  291:         unsigned char checktext[BIG_TEST_SIZE];
  292:         unsigned char iv[AES_BLOCK_SIZE*4];
  293:         unsigned char saved_iv[AES_BLOCK_SIZE*4];
  294:         int err = 0;
  295:         int n;
  296:         unsigned matches;
  297: 
  298:         assert(BIG_TEST_SIZE >= TEST_SIZE);
  299: 
  300:         RAND_pseudo_bytes(rkey, sizeof rkey);
  301:         RAND_pseudo_bytes(plaintext, sizeof plaintext);
  302:         RAND_pseudo_bytes(iv, sizeof iv);
  303:         memcpy(saved_iv, iv, sizeof saved_iv);
  304: 
  305:         /* Forward IGE only... */
  306: 
  307:         /* Straight encrypt/decrypt */
  308:         AES_set_encrypt_key(rkey, 8*sizeof rkey, &key);
  309:         AES_ige_encrypt(plaintext, ciphertext, TEST_SIZE, &key, iv,
  310:                                         AES_ENCRYPT);
  311: 
  312:         AES_set_decrypt_key(rkey, 8*sizeof rkey, &key);
  313:         memcpy(iv, saved_iv, sizeof iv);
  314:         AES_ige_encrypt(ciphertext, checktext, TEST_SIZE, &key, iv,
  315:                                         AES_DECRYPT);
  316: 
  317:         if(memcmp(checktext, plaintext, TEST_SIZE))
  318:                 {
  319:                 printf("Encrypt+decrypt doesn't match\n");
  320:                 hexdump(stdout, "Plaintext", plaintext, TEST_SIZE);
  321:                 hexdump(stdout, "Checktext", checktext, TEST_SIZE);
  322:                 ++err;
  323:                 }
  324: 
  325:         /* Now check encrypt chaining works */
  326:         AES_set_encrypt_key(rkey, 8*sizeof rkey, &key);
  327:         memcpy(iv, saved_iv, sizeof iv);
  328:         AES_ige_encrypt(plaintext, ciphertext, TEST_SIZE/2, &key, iv,
  329:                                         AES_ENCRYPT);
  330:         AES_ige_encrypt(plaintext+TEST_SIZE/2,
  331:                                         ciphertext+TEST_SIZE/2, TEST_SIZE/2,
  332:                                         &key, iv, AES_ENCRYPT);
  333: 
  334:         AES_set_decrypt_key(rkey, 8*sizeof rkey, &key);
  335:         memcpy(iv, saved_iv, sizeof iv);
  336:         AES_ige_encrypt(ciphertext, checktext, TEST_SIZE, &key, iv,
  337:                                         AES_DECRYPT);
  338: 
  339:         if(memcmp(checktext, plaintext, TEST_SIZE))
  340:                 {
  341:                 printf("Chained encrypt+decrypt doesn't match\n");
  342:                 hexdump(stdout, "Plaintext", plaintext, TEST_SIZE);
  343:                 hexdump(stdout, "Checktext", checktext, TEST_SIZE);
  344:                 ++err;
  345:                 }
  346: 
  347:         /* And check decrypt chaining */
  348:         AES_set_encrypt_key(rkey, 8*sizeof rkey, &key);
  349:         memcpy(iv, saved_iv, sizeof iv);
  350:         AES_ige_encrypt(plaintext, ciphertext, TEST_SIZE/2, &key, iv,
  351:                                         AES_ENCRYPT);
  352:         AES_ige_encrypt(plaintext+TEST_SIZE/2,
  353:                                         ciphertext+TEST_SIZE/2, TEST_SIZE/2,
  354:                                         &key, iv, AES_ENCRYPT);
  355: 
  356:         AES_set_decrypt_key(rkey, 8*sizeof rkey, &key);
  357:         memcpy(iv, saved_iv, sizeof iv);
  358:         AES_ige_encrypt(ciphertext, checktext, TEST_SIZE/2, &key, iv,
  359:                                         AES_DECRYPT);
  360:         AES_ige_encrypt(ciphertext+TEST_SIZE/2,
  361:                                         checktext+TEST_SIZE/2, TEST_SIZE/2, &key, iv,
  362:                                         AES_DECRYPT);
  363: 
  364:         if(memcmp(checktext, plaintext, TEST_SIZE))
  365:                 {
  366:                 printf("Chained encrypt+chained decrypt doesn't match\n");
  367:                 hexdump(stdout, "Plaintext", plaintext, TEST_SIZE);
  368:                 hexdump(stdout, "Checktext", checktext, TEST_SIZE);
  369:                 ++err;
  370:                 }
  371: 
  372:         /* make sure garble extends forwards only */
  373:         AES_set_encrypt_key(rkey, 8*sizeof rkey, &key);
  374:         memcpy(iv, saved_iv, sizeof iv);
  375:         AES_ige_encrypt(plaintext, ciphertext, sizeof plaintext, &key, iv,
  376:                                         AES_ENCRYPT);
  377: 
  378:         /* corrupt halfway through */
  379:         ++ciphertext[sizeof ciphertext/2];
  380:         AES_set_decrypt_key(rkey, 8*sizeof rkey, &key);
  381:         memcpy(iv, saved_iv, sizeof iv);
  382:         AES_ige_encrypt(ciphertext, checktext, sizeof checktext, &key, iv,
  383:                                         AES_DECRYPT);
  384: 
  385:         matches=0;
  386:         for(n=0 ; n < sizeof checktext ; ++n)
  387:                 if(checktext[n] == plaintext[n])
  388:                         ++matches;
  389: 
  390:         if(matches > sizeof checktext/2+sizeof checktext/100)
  391:                 {
  392:                 printf("More than 51%% matches after garbling\n");
  393:                 ++err;
  394:                 }
  395: 
  396:         if(matches < sizeof checktext/2)
  397:                 {
  398:                 printf("Garble extends backwards!\n");
  399:                 ++err;
  400:                 }
  401: 
  402:         /* Bi-directional IGE */
  403: 
  404:         /* Note that we don't have to recover the IV, because chaining isn't */
  405:         /* possible with biIGE, so the IV is not updated. */
  406: 
  407:         RAND_pseudo_bytes(rkey2, sizeof rkey2);
  408: 
  409:         /* Straight encrypt/decrypt */
  410:         AES_set_encrypt_key(rkey, 8*sizeof rkey, &key);
  411:         AES_set_encrypt_key(rkey2, 8*sizeof rkey2, &key2);
  412:         AES_bi_ige_encrypt(plaintext, ciphertext, TEST_SIZE, &key, &key2, iv,
  413:                                            AES_ENCRYPT);
  414: 
  415:         AES_set_decrypt_key(rkey, 8*sizeof rkey, &key);
  416:         AES_set_decrypt_key(rkey2, 8*sizeof rkey2, &key2);
  417:         AES_bi_ige_encrypt(ciphertext, checktext, TEST_SIZE, &key, &key2, iv,
  418:                                            AES_DECRYPT);
  419: 
  420:         if(memcmp(checktext, plaintext, TEST_SIZE))
  421:                 {
  422:                 printf("Encrypt+decrypt doesn't match\n");
  423:                 hexdump(stdout, "Plaintext", plaintext, TEST_SIZE);
  424:                 hexdump(stdout, "Checktext", checktext, TEST_SIZE);
  425:                 ++err;
  426:                 }
  427: 
  428:         /* make sure garble extends both ways */
  429:         AES_set_encrypt_key(rkey, 8*sizeof rkey, &key);
  430:         AES_set_encrypt_key(rkey2, 8*sizeof rkey2, &key2);
  431:         AES_ige_encrypt(plaintext, ciphertext, sizeof plaintext, &key, iv,
  432:                                         AES_ENCRYPT);
  433: 
  434:         /* corrupt halfway through */
  435:         ++ciphertext[sizeof ciphertext/2];
  436:         AES_set_decrypt_key(rkey, 8*sizeof rkey, &key);
  437:         AES_set_decrypt_key(rkey2, 8*sizeof rkey2, &key2);
  438:         AES_ige_encrypt(ciphertext, checktext, sizeof checktext, &key, iv,
  439:                                         AES_DECRYPT);
  440: 
  441:         matches=0;
  442:         for(n=0 ; n < sizeof checktext ; ++n)
  443:                 if(checktext[n] == plaintext[n])
  444:                         ++matches;
  445: 
  446:         if(matches > sizeof checktext/100)
  447:                 {
  448:                 printf("More than 1%% matches after bidirectional garbling\n");
  449:                 ++err;
  450:                 }
  451: 
  452:         /* make sure garble extends both ways (2) */
  453:         AES_set_encrypt_key(rkey, 8*sizeof rkey, &key);
  454:         AES_set_encrypt_key(rkey2, 8*sizeof rkey2, &key2);
  455:         AES_ige_encrypt(plaintext, ciphertext, sizeof plaintext, &key, iv,