-/* crypto/seed/seed_cbc.c -*- mode:C; c-file-style: "eay" -*- */
/* ====================================================================
* Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
*
* are met:
*
* 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
+ * 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
*
*/
-#include "seed_locl.h"
-#include <string.h>
+#include <openssl/seed.h>
+#include <openssl/modes.h>
void SEED_cbc_encrypt(const unsigned char *in, unsigned char *out,
size_t len, const SEED_KEY_SCHEDULE *ks,
unsigned char ivec[SEED_BLOCK_SIZE], int enc)
- {
- size_t n;
- unsigned char tmp[SEED_BLOCK_SIZE];
- const unsigned char *iv = ivec;
-
- if (enc)
- {
- while (len >= SEED_BLOCK_SIZE)
- {
- for (n = 0; n < SEED_BLOCK_SIZE; ++n)
- out[n] = in[n] ^ iv[n];
- SEED_encrypt(out, out, ks);
- iv = out;
- len -= SEED_BLOCK_SIZE;
- in += SEED_BLOCK_SIZE;
- out += SEED_BLOCK_SIZE;
- }
- if (len)
- {
- for (n = 0; n < len; ++n)
- out[n] = in[n] ^ iv[n];
- for (n = len; n < SEED_BLOCK_SIZE; ++n)
- out[n] = iv[n];
- SEED_encrypt(out, out, ks);
- iv = out;
- }
- memcpy(ivec, iv, SEED_BLOCK_SIZE);
- }
- else if (in != out) /* decrypt */
- {
- while (len >= SEED_BLOCK_SIZE)
- {
- SEED_decrypt(in, out, ks);
- for (n = 0; n < SEED_BLOCK_SIZE; ++n)
- out[n] ^= iv[n];
- iv = in;
- len -= SEED_BLOCK_SIZE;
- in += SEED_BLOCK_SIZE;
- out += SEED_BLOCK_SIZE;
- }
- if (len)
- {
- SEED_decrypt(in, tmp, ks);
- for (n = 0; n < len; ++n)
- out[n] = tmp[n] ^ iv[n];
- iv = in;
- }
- memcpy(ivec, iv, SEED_BLOCK_SIZE);
- }
- else /* decrypt, overlap */
- {
- while (len >= SEED_BLOCK_SIZE)
- {
- memcpy(tmp, in, SEED_BLOCK_SIZE);
- SEED_decrypt(in, out, ks);
- for (n = 0; n < SEED_BLOCK_SIZE; ++n)
- out[n] ^= ivec[n];
- memcpy(ivec, tmp, SEED_BLOCK_SIZE);
- len -= SEED_BLOCK_SIZE;
- in += SEED_BLOCK_SIZE;
- out += SEED_BLOCK_SIZE;
- }
- if (len)
- {
- memcpy(tmp, in, SEED_BLOCK_SIZE);
- SEED_decrypt(tmp, tmp, ks);
- for (n = 0; n < len; ++n)
- out[n] = tmp[n] ^ ivec[n];
- memcpy(ivec, tmp, SEED_BLOCK_SIZE);
- }
- }
- }
+{
+ if (enc)
+ CRYPTO_cbc128_encrypt(in, out, len, ks, ivec,
+ (block128_f) SEED_encrypt);
+ else
+ CRYPTO_cbc128_decrypt(in, out, len, ks, ivec,
+ (block128_f) SEED_decrypt);
+}