test/igetest.c - platform/external/openssl - Git at Google

 /* test/igetest.c -*- mode:C; c-file-style: "eay" -*- */
 /* ====================================================================
  * Copyright (c) 2006 The OpenSSL Project.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  *
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in
  *    the documentation and/or other materials provided with the
  *    distribution.
  *
  * 3. All advertising materials mentioning features or use of this
  *    software must display the following acknowledgment:
  *    "This product includes software developed by the OpenSSL Project
  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  *
  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  *    endorse or promote products derived from this software without
  *    prior written permission. For written permission, please contact
  *    [email protected].
  *
  * 5. Products derived from this software may not be called "OpenSSL"
  *    nor may "OpenSSL" appear in their names without prior written
  *    permission of the OpenSSL Project.
  *
  * 6. Redistributions of any form whatsoever must retain the following
  *    acknowledgment:
  *    "This product includes software developed by the OpenSSL Project
  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  *
  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  * OF THE POSSIBILITY OF SUCH DAMAGE.
  * ====================================================================
  *
  */

 #include <openssl/aes.h>
 #include <openssl/rand.h>
 #include <stdio.h>
 #include <string.h>
 #include <assert.h>

 #define TEST_SIZE	128
 #define BIG_TEST_SIZE 10240

 static void hexdump(FILE *f,const char *title,const unsigned char *s,int l)
     {
     int n=0;

     fprintf(f,"%s",title);
     for( ; n < l ; ++n)
 		{
 		if((n%16) == 0)
 			fprintf(f,"\n%04x",n);
 		fprintf(f," %02x",s[n]);
 		}
     fprintf(f,"\n");
     }

 #define MAX_VECTOR_SIZE	64

 struct ige_test
 	{
 	const unsigned char key[16];
 	const unsigned char iv[32];
 	const unsigned char in[MAX_VECTOR_SIZE];
 	const unsigned char out[MAX_VECTOR_SIZE];
 	const size_t length;
 	const int encrypt;
 	};

 static struct ige_test const ige_test_vectors[] = {
 { { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
     0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f }, /* key */
   { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
     0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
     0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
     0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f }, /* iv */
   { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, /* in */
   { 0x1a, 0x85, 0x19, 0xa6, 0x55, 0x7b, 0xe6, 0x52,
     0xe9, 0xda, 0x8e, 0x43, 0xda, 0x4e, 0xf4, 0x45,
     0x3c, 0xf4, 0x56, 0xb4, 0xca, 0x48, 0x8a, 0xa3,
     0x83, 0xc7, 0x9c, 0x98, 0xb3, 0x47, 0x97, 0xcb }, /* out */
   32, AES_ENCRYPT }, /* test vector 0 */

 { { 0x54, 0x68, 0x69, 0x73, 0x20, 0x69, 0x73, 0x20,
     0x61, 0x6e, 0x20, 0x69, 0x6d, 0x70, 0x6c, 0x65 }, /* key */
   { 0x6d, 0x65, 0x6e, 0x74, 0x61, 0x74, 0x69, 0x6f,
     0x6e, 0x20, 0x6f, 0x66, 0x20, 0x49, 0x47, 0x45,
     0x20, 0x6d, 0x6f, 0x64, 0x65, 0x20, 0x66, 0x6f,
     0x72, 0x20, 0x4f, 0x70, 0x65, 0x6e, 0x53, 0x53 }, /* iv */
   { 0x4c, 0x2e, 0x20, 0x4c, 0x65, 0x74, 0x27, 0x73,
     0x20, 0x68, 0x6f, 0x70, 0x65, 0x20, 0x42, 0x65,
     0x6e, 0x20, 0x67, 0x6f, 0x74, 0x20, 0x69, 0x74,
     0x20, 0x72, 0x69, 0x67, 0x68, 0x74, 0x21, 0x0a }, /* in */
   { 0x99, 0x70, 0x64, 0x87, 0xa1, 0xcd, 0xe6, 0x13,
     0xbc, 0x6d, 0xe0, 0xb6, 0xf2, 0x4b, 0x1c, 0x7a,
     0xa4, 0x48, 0xc8, 0xb9, 0xc3, 0x40, 0x3e, 0x34,
     0x67, 0xa8, 0xca, 0xd8, 0x93, 0x40, 0xf5, 0x3b }, /* out */
   32, AES_DECRYPT }, /* test vector 1 */
 };

 struct bi_ige_test
 	{
 	const unsigned char key1[32];
 	const unsigned char key2[32];
 	const unsigned char iv[64];
 	const unsigned char in[MAX_VECTOR_SIZE];
 	const unsigned char out[MAX_VECTOR_SIZE];
 	const size_t keysize;
 	const size_t length;
 	const int encrypt;
 	};

 static struct bi_ige_test const bi_ige_test_vectors[] = {
 { { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
     0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f }, /* key1 */
   { 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
     0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f }, /* key2 */
   { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
     0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
     0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
     0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
     0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
     0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
     0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
     0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f }, /* iv */
   { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, /* in */
   { 0x14, 0x40, 0x6f, 0xae, 0xa2, 0x79, 0xf2, 0x56,
 	0x1f, 0x86, 0xeb, 0x3b, 0x7d, 0xff, 0x53, 0xdc,
 	0x4e, 0x27, 0x0c, 0x03, 0xde, 0x7c, 0xe5, 0x16,
 	0x6a, 0x9c, 0x20, 0x33, 0x9d, 0x33, 0xfe, 0x12 }, /* out */
   16, 32, AES_ENCRYPT }, /* test vector 0 */
 { { 0x58, 0x0a, 0x06, 0xe9, 0x97, 0x07, 0x59, 0x5c,
 	0x9e, 0x19, 0xd2, 0xa7, 0xbb, 0x40, 0x2b, 0x7a,
 	0xc7, 0xd8, 0x11, 0x9e, 0x4c, 0x51, 0x35, 0x75,
 	0x64, 0x28, 0x0f, 0x23, 0xad, 0x74, 0xac, 0x37 }, /* key1 */
   { 0xd1, 0x80, 0xa0, 0x31, 0x47, 0xa3, 0x11, 0x13,
 	0x86, 0x26, 0x9e, 0x6d, 0xff, 0xaf, 0x72, 0x74,
 	0x5b, 0xa2, 0x35, 0x81, 0xd2, 0xa6, 0x3d, 0x21,
 	0x67, 0x7b, 0x58, 0xa8, 0x18, 0xf9, 0x72, 0xe4 }, /* key2 */
   { 0x80, 0x3d, 0xbd, 0x4c, 0xe6, 0x7b, 0x06, 0xa9,
 	0x53, 0x35, 0xd5, 0x7e, 0x71, 0xc1, 0x70, 0x70,
 	0x74, 0x9a, 0x00, 0x28, 0x0c, 0xbf, 0x6c, 0x42,
 	0x9b, 0xa4, 0xdd, 0x65, 0x11, 0x77, 0x7c, 0x67,
 	0xfe, 0x76, 0x0a, 0xf0, 0xd5, 0xc6, 0x6e, 0x6a,
 	0xe7, 0x5e, 0x4c, 0xf2, 0x7e, 0x9e, 0xf9, 0x20,
 	0x0e, 0x54, 0x6f, 0x2d, 0x8a, 0x8d, 0x7e, 0xbd,
 	0x48, 0x79, 0x37, 0x99, 0xff, 0x27, 0x93, 0xa3 }, /* iv */
   { 0xf1, 0x54, 0x3d, 0xca, 0xfe, 0xb5, 0xef, 0x1c,
 	0x4f, 0xa6, 0x43, 0xf6, 0xe6, 0x48, 0x57, 0xf0,
 	0xee, 0x15, 0x7f, 0xe3, 0xe7, 0x2f, 0xd0, 0x2f,
 	0x11, 0x95, 0x7a, 0x17, 0x00, 0xab, 0xa7, 0x0b,
 	0xbe, 0x44, 0x09, 0x9c, 0xcd, 0xac, 0xa8, 0x52,
 	0xa1, 0x8e, 0x7b, 0x75, 0xbc, 0xa4, 0x92, 0x5a,
 	0xab, 0x46, 0xd3, 0x3a, 0xa0, 0xd5, 0x35, 0x1c,
 	0x55, 0xa4, 0xb3, 0xa8, 0x40, 0x81, 0xa5, 0x0b}, /* in */
   { 0x42, 0xe5, 0x28, 0x30, 0x31, 0xc2, 0xa0, 0x23,
 	0x68, 0x49, 0x4e, 0xb3, 0x24, 0x59, 0x92, 0x79,
 	0xc1, 0xa5, 0xcc, 0xe6, 0x76, 0x53, 0xb1, 0xcf,
 	0x20, 0x86, 0x23, 0xe8, 0x72, 0x55, 0x99, 0x92,
 	0x0d, 0x16, 0x1c, 0x5a, 0x2f, 0xce, 0xcb, 0x51,
 	0xe2, 0x67, 0xfa, 0x10, 0xec, 0xcd, 0x3d, 0x67,
 	0xa5, 0xe6, 0xf7, 0x31, 0x26, 0xb0, 0x0d, 0x76,
 	0x5e, 0x28, 0xdc, 0x7f, 0x01, 0xc5, 0xa5, 0x4c}, /* out */
   32, 64, AES_ENCRYPT }, /* test vector 1 */

 };

 static int run_test_vectors(void)
 	{
 	int n;
 	int errs = 0;

 	for(n=0 ; n < sizeof(ige_test_vectors)/sizeof(ige_test_vectors[0]) ; ++n)
 		{
 		const struct ige_test * const v = &ige_test_vectors[n];
 		AES_KEY key;
 		unsigned char buf[MAX_VECTOR_SIZE];
 		unsigned char iv[AES_BLOCK_SIZE*2];

 		assert(v->length <= MAX_VECTOR_SIZE);

 		if(v->encrypt == AES_ENCRYPT)
 			AES_set_encrypt_key(v->key, 8*sizeof v->key, &key);
 		else
 			AES_set_decrypt_key(v->key, 8*sizeof v->key, &key);
 		memcpy(iv, v->iv, sizeof iv);
 		AES_ige_encrypt(v->in, buf, v->length, &key, iv, v->encrypt);

 		if(memcmp(v->out, buf, v->length))
 			{
 			printf("IGE test vector %d failed\n", n);
 			hexdump(stdout, "key", v->key, sizeof v->key);
 			hexdump(stdout, "iv", v->iv, sizeof v->iv);
 			hexdump(stdout, "in", v->in, v->length);
 			hexdump(stdout, "expected", v->out, v->length);
 			hexdump(stdout, "got", buf, v->length);

 			++errs;
 			}

 		/* try with in == out */
 		memcpy(iv, v->iv, sizeof iv);
 		memcpy(buf, v->in, v->length);
 		AES_ige_encrypt(buf, buf, v->length, &key, iv, v->encrypt);

 		if(memcmp(v->out, buf, v->length))
 			{
 			printf("IGE test vector %d failed (with in == out)\n", n);
 			hexdump(stdout, "key", v->key, sizeof v->key);
 			hexdump(stdout, "iv", v->iv, sizeof v->iv);
 			hexdump(stdout, "in", v->in, v->length);
 			hexdump(stdout, "expected", v->out, v->length);
 			hexdump(stdout, "got", buf, v->length);

 			++errs;
 			}
 		}

 	for(n=0 ; n < sizeof(bi_ige_test_vectors)/sizeof(bi_ige_test_vectors[0])
 			; ++n)
 		{
 		const struct bi_ige_test * const v = &bi_ige_test_vectors[n];
 		AES_KEY key1;
 		AES_KEY key2;
 		unsigned char buf[MAX_VECTOR_SIZE];

 		assert(v->length <= MAX_VECTOR_SIZE);

 		if(v->encrypt == AES_ENCRYPT)
 			{
 			AES_set_encrypt_key(v->key1, 8*v->keysize, &key1);
 			AES_set_encrypt_key(v->key2, 8*v->keysize, &key2);
 			}
 		else
 			{
 			AES_set_decrypt_key(v->key1, 8*v->keysize, &key1);
 			AES_set_decrypt_key(v->key2, 8*v->keysize, &key2);
 			}

 		AES_bi_ige_encrypt(v->in, buf, v->length, &key1, &key2, v->iv,
 						   v->encrypt);

 		if(memcmp(v->out, buf, v->length))
 			{
 			printf("Bidirectional IGE test vector %d failed\n", n);
 			hexdump(stdout, "key 1", v->key1, sizeof v->key1);
 			hexdump(stdout, "key 2", v->key2, sizeof v->key2);
 			hexdump(stdout, "iv", v->iv, sizeof v->iv);
 			hexdump(stdout, "in", v->in, v->length);
 			hexdump(stdout, "expected", v->out, v->length);
 			hexdump(stdout, "got", buf, v->length);

 			++errs;
 			}
 		}

 	return errs;
 	}

 int main(int argc, char **argv)
 	{
 	unsigned char rkey[16];
 	unsigned char rkey2[16];
 	AES_KEY key;
 	AES_KEY key2;
 	unsigned char plaintext[BIG_TEST_SIZE];
 	unsigned char ciphertext[BIG_TEST_SIZE];
 	unsigned char checktext[BIG_TEST_SIZE];
 	unsigned char iv[AES_BLOCK_SIZE*4];
 	unsigned char saved_iv[AES_BLOCK_SIZE*4];
 	int err = 0;
 	int n;
 	unsigned matches;

 	assert(BIG_TEST_SIZE >= TEST_SIZE);

 	RAND_pseudo_bytes(rkey, sizeof rkey);
 	RAND_pseudo_bytes(plaintext, sizeof plaintext);
 	RAND_pseudo_bytes(iv, sizeof iv);
 	memcpy(saved_iv, iv, sizeof saved_iv);

 	/* Forward IGE only... */

 	/* Straight encrypt/decrypt */
 	AES_set_encrypt_key(rkey, 8*sizeof rkey, &key);
 	AES_ige_encrypt(plaintext, ciphertext, TEST_SIZE, &key, iv,
 					AES_ENCRYPT);

 	AES_set_decrypt_key(rkey, 8*sizeof rkey, &key);
 	memcpy(iv, saved_iv, sizeof iv);
 	AES_ige_encrypt(ciphertext, checktext, TEST_SIZE, &key, iv,
 					AES_DECRYPT);

 	if(memcmp(checktext, plaintext, TEST_SIZE))
 		{
 		printf("Encrypt+decrypt doesn't match\n");
 		hexdump(stdout, "Plaintext", plaintext, TEST_SIZE);
 		hexdump(stdout, "Checktext", checktext, TEST_SIZE);
 		++err;
 		}

 	/* Now check encrypt chaining works */
 	AES_set_encrypt_key(rkey, 8*sizeof rkey, &key);
 	memcpy(iv, saved_iv, sizeof iv);
 	AES_ige_encrypt(plaintext, ciphertext, TEST_SIZE/2, &key, iv,
 					AES_ENCRYPT);
 	AES_ige_encrypt(plaintext+TEST_SIZE/2,
 					ciphertext+TEST_SIZE/2, TEST_SIZE/2,
 					&key, iv, AES_ENCRYPT);

 	AES_set_decrypt_key(rkey, 8*sizeof rkey, &key);
 	memcpy(iv, saved_iv, sizeof iv);
 	AES_ige_encrypt(ciphertext, checktext, TEST_SIZE, &key, iv,
 					AES_DECRYPT);

 	if(memcmp(checktext, plaintext, TEST_SIZE))
 		{
 		printf("Chained encrypt+decrypt doesn't match\n");
 		hexdump(stdout, "Plaintext", plaintext, TEST_SIZE);
 		hexdump(stdout, "Checktext", checktext, TEST_SIZE);
 		++err;
 		}

 	/* And check decrypt chaining */
 	AES_set_encrypt_key(rkey, 8*sizeof rkey, &key);
 	memcpy(iv, saved_iv, sizeof iv);
 	AES_ige_encrypt(plaintext, ciphertext, TEST_SIZE/2, &key, iv,
 					AES_ENCRYPT);
 	AES_ige_encrypt(plaintext+TEST_SIZE/2,
 					ciphertext+TEST_SIZE/2, TEST_SIZE/2,
 					&key, iv, AES_ENCRYPT);

 	AES_set_decrypt_key(rkey, 8*sizeof rkey, &key);
 	memcpy(iv, saved_iv, sizeof iv);
 	AES_ige_encrypt(ciphertext, checktext, TEST_SIZE/2, &key, iv,
 					AES_DECRYPT);
 	AES_ige_encrypt(ciphertext+TEST_SIZE/2,
 					checktext+TEST_SIZE/2, TEST_SIZE/2, &key, iv,
 					AES_DECRYPT);

 	if(memcmp(checktext, plaintext, TEST_SIZE))
 		{
 		printf("Chained encrypt+chained decrypt doesn't match\n");
 		hexdump(stdout, "Plaintext", plaintext, TEST_SIZE);
 		hexdump(stdout, "Checktext", checktext, TEST_SIZE);
 		++err;
 		}

 	/* make sure garble extends forwards only */
 	AES_set_encrypt_key(rkey, 8*sizeof rkey, &key);
 	memcpy(iv, saved_iv, sizeof iv);
 	AES_ige_encrypt(plaintext, ciphertext, sizeof plaintext, &key, iv,
 					AES_ENCRYPT);

 	/* corrupt halfway through */
 	++ciphertext[sizeof ciphertext/2];
 	AES_set_decrypt_key(rkey, 8*sizeof rkey, &key);
 	memcpy(iv, saved_iv, sizeof iv);
 	AES_ige_encrypt(ciphertext, checktext, sizeof checktext, &key, iv,
 					AES_DECRYPT);

 	matches=0;
 	for(n=0 ; n < sizeof checktext ; ++n)
 		if(checktext[n] == plaintext[n])
 			++matches;

 	if(matches > sizeof checktext/2+sizeof checktext/100)
 		{
 		printf("More than 51%% matches after garbling\n");
 		++err;
 		}

 	if(matches < sizeof checktext/2)
 		{
 		printf("Garble extends backwards!\n");
 		++err;
 		}

 	/* Bi-directional IGE */

 	/* Note that we don't have to recover the IV, because chaining isn't */
 	/* possible with biIGE, so the IV is not updated. */

 	RAND_pseudo_bytes(rkey2, sizeof rkey2);

 	/* Straight encrypt/decrypt */
 	AES_set_encrypt_key(rkey, 8*sizeof rkey, &key);
 	AES_set_encrypt_key(rkey2, 8*sizeof rkey2, &key2);
 	AES_bi_ige_encrypt(plaintext, ciphertext, TEST_SIZE, &key, &key2, iv,
 					   AES_ENCRYPT);

 	AES_set_decrypt_key(rkey, 8*sizeof rkey, &key);
 	AES_set_decrypt_key(rkey2, 8*sizeof rkey2, &key2);
 	AES_bi_ige_encrypt(ciphertext, checktext, TEST_SIZE, &key, &key2, iv,
 					   AES_DECRYPT);

 	if(memcmp(checktext, plaintext, TEST_SIZE))
 		{
 		printf("Encrypt+decrypt doesn't match\n");
 		hexdump(stdout, "Plaintext", plaintext, TEST_SIZE);
 		hexdump(stdout, "Checktext", checktext, TEST_SIZE);
 		++err;
 		}

 	/* make sure garble extends both ways */
 	AES_set_encrypt_key(rkey, 8*sizeof rkey, &key);
 	AES_set_encrypt_key(rkey2, 8*sizeof rkey2, &key2);
 	AES_ige_encrypt(plaintext, ciphertext, sizeof plaintext, &key, iv,
 					AES_ENCRYPT);

 	/* corrupt halfway through */
 	++ciphertext[sizeof ciphertext/2];
 	AES_set_decrypt_key(rkey, 8*sizeof rkey, &key);
 	AES_set_decrypt_key(rkey2, 8*sizeof rkey2, &key2);
 	AES_ige_encrypt(ciphertext, checktext, sizeof checktext, &key, iv,
 					AES_DECRYPT);

 	matches=0;
 	for(n=0 ; n < sizeof checktext ; ++n)
 		if(checktext[n] == plaintext[n])
 			++matches;

 	if(matches > sizeof checktext/100)
 		{
 		printf("More than 1%% matches after bidirectional garbling\n");
 		++err;
 		}

 	/* make sure garble extends both ways (2) */
 	AES_set_encrypt_key(rkey, 8*sizeof rkey, &key);
 	AES_set_encrypt_key(rkey2, 8*sizeof rkey2, &key2);
 	AES_ige_encrypt(plaintext, ciphertext, sizeof plaintext, &key, iv,
 					AES_ENCRYPT);

 	/* corrupt right at the end */
 	++ciphertext[sizeof ciphertext-1];
 	AES_set_decrypt_key(rkey, 8*sizeof rkey, &key);
 	AES_set_decrypt_key(rkey2, 8*sizeof rkey2, &key2);
 	AES_ige_encrypt(ciphertext, checktext, sizeof checktext, &key, iv,
 					AES_DECRYPT);

 	matches=0;
 	for(n=0 ; n < sizeof checktext ; ++n)
 		if(checktext[n] == plaintext[n])
 			++matches;

 	if(matches > sizeof checktext/100)
 		{
 		printf("More than 1%% matches after bidirectional garbling (2)\n");
 		++err;
 		}

 	/* make sure garble extends both ways (3) */
 	AES_set_encrypt_key(rkey, 8*sizeof rkey, &key);
 	AES_set_encrypt_key(rkey2, 8*sizeof rkey2, &key2);
 	AES_ige_encrypt(plaintext, ciphertext, sizeof plaintext, &key, iv,
 					AES_ENCRYPT);

 	/* corrupt right at the start */
 	++ciphertext[0];
 	AES_set_decrypt_key(rkey, 8*sizeof rkey, &key);
 	AES_set_decrypt_key(rkey2, 8*sizeof rkey2, &key2);
 	AES_ige_encrypt(ciphertext, checktext, sizeof checktext, &key, iv,
 					AES_DECRYPT);

 	matches=0;
 	for(n=0 ; n < sizeof checktext ; ++n)
 		if(checktext[n] == plaintext[n])
 			++matches;

 	if(matches > sizeof checktext/100)
 		{
 		printf("More than 1%% matches after bidirectional garbling (3)\n");
 		++err;
 		}

 	err += run_test_vectors();

 	return err;
 	}
	/* test/igetest.c -- mode:C; c-file-style: "eay" -- */
	/* ====================================================================
	* Copyright (c) 2006 The OpenSSL Project. All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	*
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	*
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in
	* the documentation and/or other materials provided with the
	* distribution.
	*
	* 3. All advertising materials mentioning features or use of this
	* software must display the following acknowledgment:
	* "This product includes software developed by the OpenSSL Project
	* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
	*
	* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
	* endorse or promote products derived from this software without
	* prior written permission. For written permission, please contact
	* [email protected].
	*
	* 5. Products derived from this software may not be called "OpenSSL"
	* nor may "OpenSSL" appear in their names without prior written
	* permission of the OpenSSL Project.
	*
	* 6. Redistributions of any form whatsoever must retain the following
	* acknowledgment:
	* "This product includes software developed by the OpenSSL Project
	* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
	*
	* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
	* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
	* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
	* OF THE POSSIBILITY OF SUCH DAMAGE.
	* ====================================================================
	*
	*/

	#include <openssl/aes.h>
	#include <openssl/rand.h>
	#include <stdio.h>
	#include <string.h>
	#include <assert.h>

	#define TEST_SIZE 128
	#define BIG_TEST_SIZE 10240

	static void hexdump(FILE f,const char title,const unsigned char *s,int l)
	{
	int n=0;

	fprintf(f,"%s",title);
	for( ; n < l ; ++n)
	{
	if((n%16) == 0)
	fprintf(f,"\n%04x",n);
	fprintf(f," %02x",s[n]);
	}
	fprintf(f,"\n");
	}

	#define MAX_VECTOR_SIZE 64

	struct ige_test
	{
	const unsigned char key[16];
	const unsigned char iv[32];
	const unsigned char in[MAX_VECTOR_SIZE];
	const unsigned char out[MAX_VECTOR_SIZE];
	const size_t length;
	const int encrypt;
	};

	static struct ige_test const ige_test_vectors[] = {
	{ { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
	0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f }, /* key */
	{ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
	0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
	0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
	0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f }, /* iv */
	{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, /* in */
	{ 0x1a, 0x85, 0x19, 0xa6, 0x55, 0x7b, 0xe6, 0x52,
	0xe9, 0xda, 0x8e, 0x43, 0xda, 0x4e, 0xf4, 0x45,
	0x3c, 0xf4, 0x56, 0xb4, 0xca, 0x48, 0x8a, 0xa3,
	0x83, 0xc7, 0x9c, 0x98, 0xb3, 0x47, 0x97, 0xcb }, /* out */
	32, AES_ENCRYPT }, /* test vector 0 */

	{ { 0x54, 0x68, 0x69, 0x73, 0x20, 0x69, 0x73, 0x20,
	0x61, 0x6e, 0x20, 0x69, 0x6d, 0x70, 0x6c, 0x65 }, /* key */
	{ 0x6d, 0x65, 0x6e, 0x74, 0x61, 0x74, 0x69, 0x6f,
	0x6e, 0x20, 0x6f, 0x66, 0x20, 0x49, 0x47, 0x45,
	0x20, 0x6d, 0x6f, 0x64, 0x65, 0x20, 0x66, 0x6f,
	0x72, 0x20, 0x4f, 0x70, 0x65, 0x6e, 0x53, 0x53 }, /* iv */
	{ 0x4c, 0x2e, 0x20, 0x4c, 0x65, 0x74, 0x27, 0x73,
	0x20, 0x68, 0x6f, 0x70, 0x65, 0x20, 0x42, 0x65,
	0x6e, 0x20, 0x67, 0x6f, 0x74, 0x20, 0x69, 0x74,
	0x20, 0x72, 0x69, 0x67, 0x68, 0x74, 0x21, 0x0a }, /* in */
	{ 0x99, 0x70, 0x64, 0x87, 0xa1, 0xcd, 0xe6, 0x13,
	0xbc, 0x6d, 0xe0, 0xb6, 0xf2, 0x4b, 0x1c, 0x7a,
	0xa4, 0x48, 0xc8, 0xb9, 0xc3, 0x40, 0x3e, 0x34,
	0x67, 0xa8, 0xca, 0xd8, 0x93, 0x40, 0xf5, 0x3b }, /* out */
	32, AES_DECRYPT }, /* test vector 1 */
	};

	struct bi_ige_test
	{
	const unsigned char key1[32];
	const unsigned char key2[32];
	const unsigned char iv[64];
	const unsigned char in[MAX_VECTOR_SIZE];
	const unsigned char out[MAX_VECTOR_SIZE];
	const size_t keysize;
	const size_t length;
	const int encrypt;
	};

	static struct bi_ige_test const bi_ige_test_vectors[] = {
	{ { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
	0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f }, /* key1 */
	{ 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
	0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f }, /* key2 */
	{ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
	0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
	0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
	0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
	0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
	0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
	0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
	0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f }, /* iv */
	{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, /* in */
	{ 0x14, 0x40, 0x6f, 0xae, 0xa2, 0x79, 0xf2, 0x56,
	0x1f, 0x86, 0xeb, 0x3b, 0x7d, 0xff, 0x53, 0xdc,
	0x4e, 0x27, 0x0c, 0x03, 0xde, 0x7c, 0xe5, 0x16,
	0x6a, 0x9c, 0x20, 0x33, 0x9d, 0x33, 0xfe, 0x12 }, /* out */
	16, 32, AES_ENCRYPT }, /* test vector 0 */
	{ { 0x58, 0x0a, 0x06, 0xe9, 0x97, 0x07, 0x59, 0x5c,
	0x9e, 0x19, 0xd2, 0xa7, 0xbb, 0x40, 0x2b, 0x7a,
	0xc7, 0xd8, 0x11, 0x9e, 0x4c, 0x51, 0x35, 0x75,
	0x64, 0x28, 0x0f, 0x23, 0xad, 0x74, 0xac, 0x37 }, /* key1 */
	{ 0xd1, 0x80, 0xa0, 0x31, 0x47, 0xa3, 0x11, 0x13,
	0x86, 0x26, 0x9e, 0x6d, 0xff, 0xaf, 0x72, 0x74,
	0x5b, 0xa2, 0x35, 0x81, 0xd2, 0xa6, 0x3d, 0x21,
	0x67, 0x7b, 0x58, 0xa8, 0x18, 0xf9, 0x72, 0xe4 }, /* key2 */
	{ 0x80, 0x3d, 0xbd, 0x4c, 0xe6, 0x7b, 0x06, 0xa9,
	0x53, 0x35, 0xd5, 0x7e, 0x71, 0xc1, 0x70, 0x70,
	0x74, 0x9a, 0x00, 0x28, 0x0c, 0xbf, 0x6c, 0x42,
	0x9b, 0xa4, 0xdd, 0x65, 0x11, 0x77, 0x7c, 0x67,
	0xfe, 0x76, 0x0a, 0xf0, 0xd5, 0xc6, 0x6e, 0x6a,
	0xe7, 0x5e, 0x4c, 0xf2, 0x7e, 0x9e, 0xf9, 0x20,
	0x0e, 0x54, 0x6f, 0x2d, 0x8a, 0x8d, 0x7e, 0xbd,
	0x48, 0x79, 0x37, 0x99, 0xff, 0x27, 0x93, 0xa3 }, /* iv */
	{ 0xf1, 0x54, 0x3d, 0xca, 0xfe, 0xb5, 0xef, 0x1c,
	0x4f, 0xa6, 0x43, 0xf6, 0xe6, 0x48, 0x57, 0xf0,
	0xee, 0x15, 0x7f, 0xe3, 0xe7, 0x2f, 0xd0, 0x2f,
	0x11, 0x95, 0x7a, 0x17, 0x00, 0xab, 0xa7, 0x0b,
	0xbe, 0x44, 0x09, 0x9c, 0xcd, 0xac, 0xa8, 0x52,
	0xa1, 0x8e, 0x7b, 0x75, 0xbc, 0xa4, 0x92, 0x5a,
	0xab, 0x46, 0xd3, 0x3a, 0xa0, 0xd5, 0x35, 0x1c,
	0x55, 0xa4, 0xb3, 0xa8, 0x40, 0x81, 0xa5, 0x0b}, /* in */
	{ 0x42, 0xe5, 0x28, 0x30, 0x31, 0xc2, 0xa0, 0x23,
	0x68, 0x49, 0x4e, 0xb3, 0x24, 0x59, 0x92, 0x79,
	0xc1, 0xa5, 0xcc, 0xe6, 0x76, 0x53, 0xb1, 0xcf,
	0x20, 0x86, 0x23, 0xe8, 0x72, 0x55, 0x99, 0x92,
	0x0d, 0x16, 0x1c, 0x5a, 0x2f, 0xce, 0xcb, 0x51,
	0xe2, 0x67, 0xfa, 0x10, 0xec, 0xcd, 0x3d, 0x67,
	0xa5, 0xe6, 0xf7, 0x31, 0x26, 0xb0, 0x0d, 0x76,
	0x5e, 0x28, 0xdc, 0x7f, 0x01, 0xc5, 0xa5, 0x4c}, /* out */
	32, 64, AES_ENCRYPT }, /* test vector 1 */

	};

	static int run_test_vectors(void)
	{
	int n;
	int errs = 0;

	for(n=0 ; n < sizeof(ige_test_vectors)/sizeof(ige_test_vectors[0]) ; ++n)
	{
	const struct ige_test * const v = &ige_test_vectors[n];
	AES_KEY key;
	unsigned char buf[MAX_VECTOR_SIZE];
	unsigned char iv[AES_BLOCK_SIZE*2];

	assert(v->length <= MAX_VECTOR_SIZE);

	if(v->encrypt == AES_ENCRYPT)
	AES_set_encrypt_key(v->key, 8*sizeof v->key, &key);
	else
	AES_set_decrypt_key(v->key, 8*sizeof v->key, &key);
	memcpy(iv, v->iv, sizeof iv);
	AES_ige_encrypt(v->in, buf, v->length, &key, iv, v->encrypt);

	if(memcmp(v->out, buf, v->length))
	{
	printf("IGE test vector %d failed\n", n);
	hexdump(stdout, "key", v->key, sizeof v->key);
	hexdump(stdout, "iv", v->iv, sizeof v->iv);
	hexdump(stdout, "in", v->in, v->length);
	hexdump(stdout, "expected", v->out, v->length);
	hexdump(stdout, "got", buf, v->length);

	++errs;
	}

	/* try with in == out */
	memcpy(iv, v->iv, sizeof iv);
	memcpy(buf, v->in, v->length);
	AES_ige_encrypt(buf, buf, v->length, &key, iv, v->encrypt);

	if(memcmp(v->out, buf, v->length))
	{
	printf("IGE test vector %d failed (with in == out)\n", n);
	hexdump(stdout, "key", v->key, sizeof v->key);
	hexdump(stdout, "iv", v->iv, sizeof v->iv);
	hexdump(stdout, "in", v->in, v->length);
	hexdump(stdout, "expected", v->out, v->length);
	hexdump(stdout, "got", buf, v->length);

	++errs;
	}
	}

	for(n=0 ; n < sizeof(bi_ige_test_vectors)/sizeof(bi_ige_test_vectors[0])
	; ++n)
	{
	const struct bi_ige_test * const v = &bi_ige_test_vectors[n];
	AES_KEY key1;
	AES_KEY key2;
	unsigned char buf[MAX_VECTOR_SIZE];

	assert(v->length <= MAX_VECTOR_SIZE);

	if(v->encrypt == AES_ENCRYPT)
	{
	AES_set_encrypt_key(v->key1, 8*v->keysize, &key1);
	AES_set_encrypt_key(v->key2, 8*v->keysize, &key2);
	}
	else
	{
	AES_set_decrypt_key(v->key1, 8*v->keysize, &key1);
	AES_set_decrypt_key(v->key2, 8*v->keysize, &key2);
	}

	AES_bi_ige_encrypt(v->in, buf, v->length, &key1, &key2, v->iv,
	v->encrypt);

	if(memcmp(v->out, buf, v->length))
	{
	printf("Bidirectional IGE test vector %d failed\n", n);
	hexdump(stdout, "key 1", v->key1, sizeof v->key1);
	hexdump(stdout, "key 2", v->key2, sizeof v->key2);
	hexdump(stdout, "iv", v->iv, sizeof v->iv);
	hexdump(stdout, "in", v->in, v->length);
	hexdump(stdout, "expected", v->out, v->length);
	hexdump(stdout, "got", buf, v->length);

	++errs;
	}
	}

	return errs;
	}

	int main(int argc, char **argv)
	{
	unsigned char rkey[16];
	unsigned char rkey2[16];
	AES_KEY key;
	AES_KEY key2;
	unsigned char plaintext[BIG_TEST_SIZE];
	unsigned char ciphertext[BIG_TEST_SIZE];
	unsigned char checktext[BIG_TEST_SIZE];
	unsigned char iv[AES_BLOCK_SIZE*4];
	unsigned char saved_iv[AES_BLOCK_SIZE*4];
	int err = 0;
	int n;
	unsigned matches;

	assert(BIG_TEST_SIZE >= TEST_SIZE);

	RAND_pseudo_bytes(rkey, sizeof rkey);
	RAND_pseudo_bytes(plaintext, sizeof plaintext);
	RAND_pseudo_bytes(iv, sizeof iv);
	memcpy(saved_iv, iv, sizeof saved_iv);

	/* Forward IGE only... */

	/* Straight encrypt/decrypt */
	AES_set_encrypt_key(rkey, 8*sizeof rkey, &key);
	AES_ige_encrypt(plaintext, ciphertext, TEST_SIZE, &key, iv,
	AES_ENCRYPT);

	AES_set_decrypt_key(rkey, 8*sizeof rkey, &key);
	memcpy(iv, saved_iv, sizeof iv);
	AES_ige_encrypt(ciphertext, checktext, TEST_SIZE, &key, iv,
	AES_DECRYPT);

	if(memcmp(checktext, plaintext, TEST_SIZE))
	{
	printf("Encrypt+decrypt doesn't match\n");
	hexdump(stdout, "Plaintext", plaintext, TEST_SIZE);
	hexdump(stdout, "Checktext", checktext, TEST_SIZE);
	++err;
	}

	/* Now check encrypt chaining works */
	AES_set_encrypt_key(rkey, 8*sizeof rkey, &key);
	memcpy(iv, saved_iv, sizeof iv);
	AES_ige_encrypt(plaintext, ciphertext, TEST_SIZE/2, &key, iv,
	AES_ENCRYPT);
	AES_ige_encrypt(plaintext+TEST_SIZE/2,
	ciphertext+TEST_SIZE/2, TEST_SIZE/2,
	&key, iv, AES_ENCRYPT);

	AES_set_decrypt_key(rkey, 8*sizeof rkey, &key);
	memcpy(iv, saved_iv, sizeof iv);
	AES_ige_encrypt(ciphertext, checktext, TEST_SIZE, &key, iv,
	AES_DECRYPT);

	if(memcmp(checktext, plaintext, TEST_SIZE))
	{
	printf("Chained encrypt+decrypt doesn't match\n");
	hexdump(stdout, "Plaintext", plaintext, TEST_SIZE);
	hexdump(stdout, "Checktext", checktext, TEST_SIZE);
	++err;
	}

	/* And check decrypt chaining */
	AES_set_encrypt_key(rkey, 8*sizeof rkey, &key);
	memcpy(iv, saved_iv, sizeof iv);
	AES_ige_encrypt(plaintext, ciphertext, TEST_SIZE/2, &key, iv,
	AES_ENCRYPT);
	AES_ige_encrypt(plaintext+TEST_SIZE/2,
	ciphertext+TEST_SIZE/2, TEST_SIZE/2,
	&key, iv, AES_ENCRYPT);

	AES_set_decrypt_key(rkey, 8*sizeof rkey, &key);
	memcpy(iv, saved_iv, sizeof iv);
	AES_ige_encrypt(ciphertext, checktext, TEST_SIZE/2, &key, iv,
	AES_DECRYPT);
	AES_ige_encrypt(ciphertext+TEST_SIZE/2,
	checktext+TEST_SIZE/2, TEST_SIZE/2, &key, iv,
	AES_DECRYPT);

	if(memcmp(checktext, plaintext, TEST_SIZE))
	{
	printf("Chained encrypt+chained decrypt doesn't match\n");
	hexdump(stdout, "Plaintext", plaintext, TEST_SIZE);
	hexdump(stdout, "Checktext", checktext, TEST_SIZE);
	++err;
	}

	/* make sure garble extends forwards only */
	AES_set_encrypt_key(rkey, 8*sizeof rkey, &key);
	memcpy(iv, saved_iv, sizeof iv);
	AES_ige_encrypt(plaintext, ciphertext, sizeof plaintext, &key, iv,
	AES_ENCRYPT);

	/* corrupt halfway through */
	++ciphertext[sizeof ciphertext/2];
	AES_set_decrypt_key(rkey, 8*sizeof rkey, &key);
	memcpy(iv, saved_iv, sizeof iv);
	AES_ige_encrypt(ciphertext, checktext, sizeof checktext, &key, iv,
	AES_DECRYPT);

	matches=0;
	for(n=0 ; n < sizeof checktext ; ++n)
	if(checktext[n] == plaintext[n])
	++matches;

	if(matches > sizeof checktext/2+sizeof checktext/100)
	{
	printf("More than 51%% matches after garbling\n");
	++err;
	}

	if(matches < sizeof checktext/2)
	{
	printf("Garble extends backwards!\n");
	++err;
	}

	/* Bi-directional IGE */

	/* Note that we don't have to recover the IV, because chaining isn't */
	/* possible with biIGE, so the IV is not updated. */

	RAND_pseudo_bytes(rkey2, sizeof rkey2);

	/* Straight encrypt/decrypt */
	AES_set_encrypt_key(rkey, 8*sizeof rkey, &key);
	AES_set_encrypt_key(rkey2, 8*sizeof rkey2, &key2);
	AES_bi_ige_encrypt(plaintext, ciphertext, TEST_SIZE, &key, &key2, iv,
	AES_ENCRYPT);

	AES_set_decrypt_key(rkey, 8*sizeof rkey, &key);
	AES_set_decrypt_key(rkey2, 8*sizeof rkey2, &key2);
	AES_bi_ige_encrypt(ciphertext, checktext, TEST_SIZE, &key, &key2, iv,
	AES_DECRYPT);

	if(memcmp(checktext, plaintext, TEST_SIZE))
	{
	printf("Encrypt+decrypt doesn't match\n");
	hexdump(stdout, "Plaintext", plaintext, TEST_SIZE);
	hexdump(stdout, "Checktext", checktext, TEST_SIZE);
	++err;
	}

	/* make sure garble extends both ways */
	AES_set_encrypt_key(rkey, 8*sizeof rkey, &key);
	AES_set_encrypt_key(rkey2, 8*sizeof rkey2, &key2);
	AES_ige_encrypt(plaintext, ciphertext, sizeof plaintext, &key, iv,
	AES_ENCRYPT);

	/* corrupt halfway through */
	++ciphertext[sizeof ciphertext/2];
	AES_set_decrypt_key(rkey, 8*sizeof rkey, &key);
	AES_set_decrypt_key(rkey2, 8*sizeof rkey2, &key2);
	AES_ige_encrypt(ciphertext, checktext, sizeof checktext, &key, iv,
	AES_DECRYPT);

	matches=0;
	for(n=0 ; n < sizeof checktext ; ++n)
	if(checktext[n] == plaintext[n])
	++matches;

	if(matches > sizeof checktext/100)
	{
	printf("More than 1%% matches after bidirectional garbling\n");
	++err;
	}

	/* make sure garble extends both ways (2) */
	AES_set_encrypt_key(rkey, 8*sizeof rkey, &key);
	AES_set_encrypt_key(rkey2, 8*sizeof rkey2, &key2);
	AES_ige_encrypt(plaintext, ciphertext, sizeof plaintext, &key, iv,
	AES_ENCRYPT);

	/* corrupt right at the end */
	++ciphertext[sizeof ciphertext-1];
	AES_set_decrypt_key(rkey, 8*sizeof rkey, &key);
	AES_set_decrypt_key(rkey2, 8*sizeof rkey2, &key2);
	AES_ige_encrypt(ciphertext, checktext, sizeof checktext, &key, iv,
	AES_DECRYPT);

	matches=0;
	for(n=0 ; n < sizeof checktext ; ++n)
	if(checktext[n] == plaintext[n])
	++matches;

	if(matches > sizeof checktext/100)
	{
	printf("More than 1%% matches after bidirectional garbling (2)\n");
	++err;
	}

	/* make sure garble extends both ways (3) */
	AES_set_encrypt_key(rkey, 8*sizeof rkey, &key);
	AES_set_encrypt_key(rkey2, 8*sizeof rkey2, &key2);
	AES_ige_encrypt(plaintext, ciphertext, sizeof plaintext, &key, iv,
	AES_ENCRYPT);

	/* corrupt right at the start */
	++ciphertext[0];
	AES_set_decrypt_key(rkey, 8*sizeof rkey, &key);
	AES_set_decrypt_key(rkey2, 8*sizeof rkey2, &key2);
	AES_ige_encrypt(ciphertext, checktext, sizeof checktext, &key, iv,
	AES_DECRYPT);

	matches=0;
	for(n=0 ; n < sizeof checktext ; ++n)
	if(checktext[n] == plaintext[n])
	++matches;

	if(matches > sizeof checktext/100)
	{
	printf("More than 1%% matches after bidirectional garbling (3)\n");
	++err;
	}

	err += run_test_vectors();

	return err;
	}