}
}
}
-
-/*
- * Note that its effectively impossible to do biIGE in anything other
- * than a single pass, so no provision is made for chaining.
- */
-
-/* N.B. The IV for this mode is _four times_ the block size */
-
-void
-AES_bi_ige_encrypt(const unsigned char *in, unsigned char *out, size_t length,
- const AES_KEY *key, const AES_KEY *key2, const unsigned char *ivec,
- const int enc)
-{
- size_t n;
- size_t len = length;
- unsigned char tmp[AES_BLOCK_SIZE];
- unsigned char tmp2[AES_BLOCK_SIZE];
- unsigned char tmp3[AES_BLOCK_SIZE];
- unsigned char prev[AES_BLOCK_SIZE];
- const unsigned char *iv;
- const unsigned char *iv2;
-
- OPENSSL_assert(in && out && key && ivec);
- OPENSSL_assert((AES_ENCRYPT == enc) || (AES_DECRYPT == enc));
- OPENSSL_assert((length % AES_BLOCK_SIZE) == 0);
-
- if (AES_ENCRYPT == enc) {
- /* XXX: Do a separate case for when in != out (strictly should
- check for overlap, too) */
-
- /* First the forward pass */
- iv = ivec;
- iv2 = ivec + AES_BLOCK_SIZE;
- while (len >= AES_BLOCK_SIZE) {
- for (n = 0; n < AES_BLOCK_SIZE; ++n)
- out[n] = in[n] ^ iv[n];
- AES_encrypt(out, out, key);
- for (n = 0; n < AES_BLOCK_SIZE; ++n)
- out[n] ^= iv2[n];
- iv = out;
- memcpy(prev, in, AES_BLOCK_SIZE);
- iv2 = prev;
- len -= AES_BLOCK_SIZE;
- in += AES_BLOCK_SIZE;
- out += AES_BLOCK_SIZE;
- }
-
- /* And now backwards */
- iv = ivec + AES_BLOCK_SIZE*2;
- iv2 = ivec + AES_BLOCK_SIZE*3;
- len = length;
- while (len >= AES_BLOCK_SIZE) {
- out -= AES_BLOCK_SIZE;
- /* XXX: reduce copies by alternating between buffers */
- memcpy(tmp, out, AES_BLOCK_SIZE);
- for (n = 0; n < AES_BLOCK_SIZE; ++n)
- out[n] ^= iv[n];
- /* hexdump(stdout, "out ^ iv", out, AES_BLOCK_SIZE); */
- AES_encrypt(out, out, key);
- /* hexdump(stdout,"enc", out, AES_BLOCK_SIZE); */
- /* hexdump(stdout,"iv2", iv2, AES_BLOCK_SIZE); */
- for (n = 0; n < AES_BLOCK_SIZE; ++n)
- out[n] ^= iv2[n];
- /* hexdump(stdout,"out", out, AES_BLOCK_SIZE); */
- iv = out;
- memcpy(prev, tmp, AES_BLOCK_SIZE);
- iv2 = prev;
- len -= AES_BLOCK_SIZE;
- }
- } else {
- /* First backwards */
- iv = ivec + AES_BLOCK_SIZE*2;
- iv2 = ivec + AES_BLOCK_SIZE*3;
- in += length;
- out += length;
- while (len >= AES_BLOCK_SIZE) {
- in -= AES_BLOCK_SIZE;
- out -= AES_BLOCK_SIZE;
- memcpy(tmp, in, AES_BLOCK_SIZE);
- memcpy(tmp2, in, AES_BLOCK_SIZE);
- for (n = 0; n < AES_BLOCK_SIZE; ++n)
- tmp[n] ^= iv2[n];
- AES_decrypt(tmp, out, key);
- for (n = 0; n < AES_BLOCK_SIZE; ++n)
- out[n] ^= iv[n];
- memcpy(tmp3, tmp2, AES_BLOCK_SIZE);
- iv = tmp3;
- iv2 = out;
- len -= AES_BLOCK_SIZE;
- }
-
- /* And now forwards */
- iv = ivec;
- iv2 = ivec + AES_BLOCK_SIZE;
- len = length;
- while (len >= AES_BLOCK_SIZE) {
- memcpy(tmp, out, AES_BLOCK_SIZE);
- memcpy(tmp2, out, AES_BLOCK_SIZE);
- for (n = 0; n < AES_BLOCK_SIZE; ++n)
- tmp[n] ^= iv2[n];
- AES_decrypt(tmp, out, key);
- for (n = 0; n < AES_BLOCK_SIZE; ++n)
- out[n] ^= iv[n];
- memcpy(tmp3, tmp2, AES_BLOCK_SIZE);
- iv = tmp3;
- iv2 = out;
- len -= AES_BLOCK_SIZE;
- in += AES_BLOCK_SIZE;
- out += AES_BLOCK_SIZE;
- }
- }
-}
}
}
}
-
-/*
- * Note that its effectively impossible to do biIGE in anything other
- * than a single pass, so no provision is made for chaining.
- */
-
-/* N.B. The IV for this mode is _four times_ the block size */
-
-void
-AES_bi_ige_encrypt(const unsigned char *in, unsigned char *out, size_t length,
- const AES_KEY *key, const AES_KEY *key2, const unsigned char *ivec,
- const int enc)
-{
- size_t n;
- size_t len = length;
- unsigned char tmp[AES_BLOCK_SIZE];
- unsigned char tmp2[AES_BLOCK_SIZE];
- unsigned char tmp3[AES_BLOCK_SIZE];
- unsigned char prev[AES_BLOCK_SIZE];
- const unsigned char *iv;
- const unsigned char *iv2;
-
- OPENSSL_assert(in && out && key && ivec);
- OPENSSL_assert((AES_ENCRYPT == enc) || (AES_DECRYPT == enc));
- OPENSSL_assert((length % AES_BLOCK_SIZE) == 0);
-
- if (AES_ENCRYPT == enc) {
- /* XXX: Do a separate case for when in != out (strictly should
- check for overlap, too) */
-
- /* First the forward pass */
- iv = ivec;
- iv2 = ivec + AES_BLOCK_SIZE;
- while (len >= AES_BLOCK_SIZE) {
- for (n = 0; n < AES_BLOCK_SIZE; ++n)
- out[n] = in[n] ^ iv[n];
- AES_encrypt(out, out, key);
- for (n = 0; n < AES_BLOCK_SIZE; ++n)
- out[n] ^= iv2[n];
- iv = out;
- memcpy(prev, in, AES_BLOCK_SIZE);
- iv2 = prev;
- len -= AES_BLOCK_SIZE;
- in += AES_BLOCK_SIZE;
- out += AES_BLOCK_SIZE;
- }
-
- /* And now backwards */
- iv = ivec + AES_BLOCK_SIZE*2;
- iv2 = ivec + AES_BLOCK_SIZE*3;
- len = length;
- while (len >= AES_BLOCK_SIZE) {
- out -= AES_BLOCK_SIZE;
- /* XXX: reduce copies by alternating between buffers */
- memcpy(tmp, out, AES_BLOCK_SIZE);
- for (n = 0; n < AES_BLOCK_SIZE; ++n)
- out[n] ^= iv[n];
- /* hexdump(stdout, "out ^ iv", out, AES_BLOCK_SIZE); */
- AES_encrypt(out, out, key);
- /* hexdump(stdout,"enc", out, AES_BLOCK_SIZE); */
- /* hexdump(stdout,"iv2", iv2, AES_BLOCK_SIZE); */
- for (n = 0; n < AES_BLOCK_SIZE; ++n)
- out[n] ^= iv2[n];
- /* hexdump(stdout,"out", out, AES_BLOCK_SIZE); */
- iv = out;
- memcpy(prev, tmp, AES_BLOCK_SIZE);
- iv2 = prev;
- len -= AES_BLOCK_SIZE;
- }
- } else {
- /* First backwards */
- iv = ivec + AES_BLOCK_SIZE*2;
- iv2 = ivec + AES_BLOCK_SIZE*3;
- in += length;
- out += length;
- while (len >= AES_BLOCK_SIZE) {
- in -= AES_BLOCK_SIZE;
- out -= AES_BLOCK_SIZE;
- memcpy(tmp, in, AES_BLOCK_SIZE);
- memcpy(tmp2, in, AES_BLOCK_SIZE);
- for (n = 0; n < AES_BLOCK_SIZE; ++n)
- tmp[n] ^= iv2[n];
- AES_decrypt(tmp, out, key);
- for (n = 0; n < AES_BLOCK_SIZE; ++n)
- out[n] ^= iv[n];
- memcpy(tmp3, tmp2, AES_BLOCK_SIZE);
- iv = tmp3;
- iv2 = out;
- len -= AES_BLOCK_SIZE;
- }
-
- /* And now forwards */
- iv = ivec;
- iv2 = ivec + AES_BLOCK_SIZE;
- len = length;
- while (len >= AES_BLOCK_SIZE) {
- memcpy(tmp, out, AES_BLOCK_SIZE);
- memcpy(tmp2, out, AES_BLOCK_SIZE);
- for (n = 0; n < AES_BLOCK_SIZE; ++n)
- tmp[n] ^= iv2[n];
- AES_decrypt(tmp, out, key);
- for (n = 0; n < AES_BLOCK_SIZE; ++n)
- out[n] ^= iv[n];
- memcpy(tmp3, tmp2, AES_BLOCK_SIZE);
- iv = tmp3;
- iv2 = out;
- len -= AES_BLOCK_SIZE;
- in += AES_BLOCK_SIZE;
- out += AES_BLOCK_SIZE;
- }
- }
-}
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)
{
unsigned int n;
}
}
- 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;
}
++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);
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