cast.h
- Author: Pekka Riikonen <priikone@poseidon.pspt.fi>
+ Author: Pekka Riikonen <priikone@silcnet.org>
- Copyright (C) 1999 - 2000 Pekka Riikonen
+ Copyright (C) 1999 - 2000, 2006, 2007 Pekka Riikonen
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
+ the Free Software Foundation; version 2 of the License.
+
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
*/
-/*
- * $Id$
- * $Log$
- * Revision 1.1 2000/06/27 11:36:54 priikone
- * Initial revision
- *
- *
- */
#ifndef CAST_H
#define CAST_H
-#include "cast_internal.h"
-
-/*
- * SILC Crypto API for Cast
+/*
+ * SILC Crypto API for Cast-256
*/
-/* Sets the key for the cipher. */
-
-inline int silc_cast_init(void *context,
- const unsigned char *key,
- unsigned int keylen)
-{
- cast_set_key((CastContext *)context, (unsigned int *)key, keylen);
- return 1;
-}
-
-/* Sets the string as a new key for the cipher. The string is first
- hashed and then used as a new key. */
-
-inline int silc_cast_set_string_as_key(void *context,
- const unsigned char *string,
- unsigned int stringlen)
-{
- /* SilcHash hash;
- unsigned char key[16];
-
- silc_hash_alloc("md5", &hash);
- hash->make_hash(hash, string, stringlen, key);
-
- cast_set_key((CastContext *)context, (const u4byte *)key, sizeof(key));
-
- silc_hash_free(hash);
- memset(&key, 'F', sizeof(key));
- */
- return TRUE;
-}
-
-/* Returns the size of the cipher context. */
-
-inline unsigned int silc_cast_context_len()
-{
- return sizeof(CastContext);
-}
-
-/* Encrypts with the cipher in CBC mode. */
-
-inline int silc_cast_encrypt_cbc(void *context,
- const unsigned char *src,
- unsigned char *dst,
- unsigned int len,
- unsigned char *iv)
-{
- unsigned int *in, *out, *tiv;
- unsigned int tmp[4];
- int i;
-
- in = (unsigned int *)src;
- out = (unsigned int *)dst;
- tiv = (unsigned int *)iv;
-
- tmp[0] = in[0] ^ tiv[0];
- tmp[1] = in[1] ^ tiv[1];
- tmp[2] = in[2] ^ tiv[2];
- tmp[3] = in[3] ^ tiv[3];
- cast_encrypt((CastContext *)context, tmp, out);
- in += 4;
- out += 4;
-
- for (i = 16; i < len; i += 16) {
- tmp[0] = in[0] ^ out[0 - 4];
- tmp[1] = in[1] ^ out[1 - 4];
- tmp[2] = in[2] ^ out[2 - 4];
- tmp[3] = in[3] ^ out[3 - 4];
- cast_encrypt((CastContext *)context, tmp, out);
- in += 4;
- out += 4;
- }
-
- return 1;
-}
-
-/* Decrypts with the cipher in CBC mode. */
-
-inline int silc_cast_decrypt_cbc(void *context,
- const unsigned char *src,
- unsigned char *dst,
- unsigned int len,
- unsigned char *iv)
-{
- unsigned int *in, *out, *tiv;
- int i;
-
- in = (unsigned int *)src;
- out = (unsigned int *)dst;
- tiv = (unsigned int *)iv;
-
- cast_decrypt((CastContext *)context, in, out);
- out[0] ^= tiv[0];
- out[1] ^= tiv[1];
- out[2] ^= tiv[2];
- out[3] ^= tiv[3];
- in += 4;
- out += 4;
-
- for (i = 16; i < len; i += 16) {
- cast_decrypt((CastContext *)context, in, out);
- out[0] ^= in[0 - 4];
- out[1] ^= in[1 - 4];
- out[2] ^= in[2 - 4];
- out[3] ^= in[3 - 4];
- in += 4;
- out += 4;
- }
-
- return 1;
-}
+SILC_CIPHER_API_SET_KEY(cast_cbc);
+SILC_CIPHER_API_SET_IV(cast_cbc);
+SILC_CIPHER_API_CONTEXT_LEN(cast_cbc);
+SILC_CIPHER_API_ENCRYPT(cast_cbc);
+SILC_CIPHER_API_DECRYPT(cast_cbc);
#endif