Added encryptio boolena indicator to silc_cipher_set_key.

[silc.git] / lib / silccrypt / silccipher.c

diff --git a/lib/silccrypt/silccipher.c b/lib/silccrypt/silccipher.c
index 2264d5cfc51b8212392aaccaf03f2ebf4c9c2821..1832566fec29c45286b3a926c316f63f779746c8 100644 (file)
--- a/lib/silccrypt/silccipher.c
+++ b/lib/silccrypt/silccipher.c
@@ -4,7 +4,7 @@
 
   Author: Pekka Riikonen <priikone@silcnet.org>
 
-  Copyright (C) 1997 - 2005 Pekka Riikonen
+  Copyright (C) 1997 - 2006 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
@@ -36,43 +36,47 @@ SilcDList silc_cipher_list = NULL;
 /* Static list of ciphers for silc_cipher_register_default(). */
 const SilcCipherObject silc_default_ciphers[] =
 {
-  { "aes-256-cbc", 16, 256, silc_aes_set_key,
-    silc_aes_set_key_with_string, silc_aes_encrypt_cbc,
-    silc_aes_decrypt_cbc, silc_aes_context_len },
-  { "aes-192-cbc", 16, 192, silc_aes_set_key,
-    silc_aes_set_key_with_string, silc_aes_encrypt_cbc,
-    silc_aes_decrypt_cbc, silc_aes_context_len },
-  { "aes-128-cbc", 16, 128, silc_aes_set_key,
-    silc_aes_set_key_with_string, silc_aes_encrypt_cbc,
-    silc_aes_decrypt_cbc, silc_aes_context_len },
-  { "twofish-256-cbc", 16, 256, silc_twofish_set_key,
-    silc_twofish_set_key_with_string,
+  { "aes-256-cbc", silc_aes_set_key,
+    silc_aes_encrypt_cbc, silc_aes_decrypt_cbc, silc_aes_context_len,
+    256, 16, 16 },
+  { "aes-192-cbc", silc_aes_set_key,
+    silc_aes_encrypt_cbc, silc_aes_decrypt_cbc, silc_aes_context_len,
+    192, 16, 16 },
+  { "aes-128-cbc", silc_aes_set_key,
+    silc_aes_encrypt_cbc, silc_aes_decrypt_cbc, silc_aes_context_len,
+    128, 16, 16 },
+  { "twofish-256-cbc", silc_twofish_set_key,
     silc_twofish_encrypt_cbc, silc_twofish_decrypt_cbc,
-    silc_twofish_context_len },
-  { "twofish-192-cbc", 16, 192, silc_twofish_set_key,
-    silc_twofish_set_key_with_string,
+    silc_twofish_context_len,
+    256, 16, 16 },
+  { "twofish-192-cbc", silc_twofish_set_key,
     silc_twofish_encrypt_cbc, silc_twofish_decrypt_cbc,
-    silc_twofish_context_len },
-  { "twofish-128-cbc", 16, 128, silc_twofish_set_key,
-    silc_twofish_set_key_with_string,
+    silc_twofish_context_len,
+    192, 16, 16 },
+  { "twofish-128-cbc", silc_twofish_set_key,
     silc_twofish_encrypt_cbc, silc_twofish_decrypt_cbc,
-    silc_twofish_context_len },
-  { "cast-256-cbc", 16, 256, silc_cast_set_key, silc_cast_set_key_with_string,
+    silc_twofish_context_len,
+    128, 16, 16 },
+  { "cast-256-cbc", silc_cast_set_key,
     silc_cast_encrypt_cbc, silc_cast_decrypt_cbc,
-    silc_cast_context_len },
-  { "cast-192-cbc", 16, 192, silc_cast_set_key, silc_cast_set_key_with_string,
+    silc_cast_context_len,
+    256, 16, 16 },
+  { "cast-192-cbc", silc_cast_set_key,
     silc_cast_encrypt_cbc, silc_cast_decrypt_cbc,
-    silc_cast_context_len },
-  { "cast-128-cbc", 16, 128, silc_cast_set_key, silc_cast_set_key_with_string,
+    silc_cast_context_len,
+    192, 16, 16 },
+  { "cast-128-cbc", silc_cast_set_key,
     silc_cast_encrypt_cbc, silc_cast_decrypt_cbc,
-    silc_cast_context_len },
+    silc_cast_context_len,
+    128, 16, 16 },
 #ifdef SILC_DEBUG
-  { "none", 0, 0, silc_none_set_key, silc_none_set_key_with_string,
+  { "none", silc_none_set_key,
     silc_none_encrypt_cbc, silc_none_decrypt_cbc,
-    silc_none_context_len },
+    silc_none_context_len,
+    0, 0, 0 },
 #endif /* SILC_DEBUG */
 
-  { NULL, 0, 0, NULL, NULL, NULL, NULL, NULL }
+  { NULL, NULL, NULL, NULL, NULL, 0, 0, 0 }
 };
 
 /* Register a new cipher into SILC. This is used at the initialization of
@@ -99,10 +103,10 @@ SilcBool silc_cipher_register(const SilcCipherObject *cipher)
 
   new = silc_calloc(1, sizeof(*new));
   new->name = strdup(cipher->name);
-  new->block_len = cipher->block_len;
   new->key_len = cipher->key_len;
+  new->block_len = cipher->block_len;
+  new->iv_len = cipher->iv_len;
   new->set_key = cipher->set_key;
-  new->set_key_with_string = cipher->set_key_with_string;
   new->encrypt = cipher->encrypt;
   new->decrypt = cipher->decrypt;
   new->context_len = cipher->context_len;
@@ -304,13 +308,11 @@ char *silc_cipher_get_supported(void)
 /* Encrypts */
 
 SilcBool silc_cipher_encrypt(SilcCipher cipher, const unsigned char *src,
-                        unsigned char *dst, SilcUInt32 len,
-                        unsigned char *iv)
+                            unsigned char *dst, SilcUInt32 len,
+                            unsigned char *iv)
 {
-#ifdef SILC_DEBUG
-  assert((len & (cipher->cipher->block_len - 1)) == 0);
-#endif
-  if (len & (cipher->cipher->block_len - 1))
+  SILC_ASSERT((len & (cipher->cipher->block_len - 1)) == 0);
+  if (silc_unlikely(len & (cipher->cipher->block_len - 1)))
     return FALSE;
   return cipher->cipher->encrypt(cipher->context, src, dst, len,
                                 iv ? iv : cipher->iv);
@@ -319,13 +321,10 @@ SilcBool silc_cipher_encrypt(SilcCipher cipher, const unsigned char *src,
 /* Decrypts */
 
 SilcBool silc_cipher_decrypt(SilcCipher cipher, const unsigned char *src,
-                        unsigned char *dst, SilcUInt32 len,
-                        unsigned char *iv)
+                            unsigned char *dst, SilcUInt32 len,
+                            unsigned char *iv)
 {
-#ifdef SILC_DEBUG
-  /*  assert((len & (cipher->cipher->block_len - 1)) == 0); */
-#endif
-  if (len & (cipher->cipher->block_len - 1))
+  if (silc_unlikely(len & (cipher->cipher->block_len - 1)))
     return FALSE;
   return cipher->cipher->decrypt(cipher->context, src, dst, len,
                                 iv ? iv : cipher->iv);
@@ -334,17 +333,16 @@ SilcBool silc_cipher_decrypt(SilcCipher cipher, const unsigned char *src,
 /* Sets the key for the cipher */
 
 SilcBool silc_cipher_set_key(SilcCipher cipher, const unsigned char *key,
-                        SilcUInt32 keylen)
+                            SilcUInt32 keylen, SilcBool encryption)
 {
-  return cipher->cipher->set_key(cipher->context, key, keylen);
+  return cipher->cipher->set_key(cipher->context, key, keylen, encryption);
 }
 
 /* Sets the IV (initial vector) for the cipher. */
 
 void silc_cipher_set_iv(SilcCipher cipher, const unsigned char *iv)
 {
-  memset(&cipher->iv, 0, sizeof(cipher->iv));
-  memcpy(&cipher->iv, iv, cipher->cipher->block_len);
+  memcpy(&cipher->iv, iv, cipher->cipher->iv_len);
 }
 
 /* Returns the IV (initial vector) of the cipher. */
@@ -368,6 +366,13 @@ SilcUInt32 silc_cipher_get_block_len(SilcCipher cipher)
   return cipher->cipher->block_len;
 }
 
+/* Returns the IV length of the cipher. */
+
+SilcUInt32 silc_cipher_get_iv_len(SilcCipher cipher)
+{
+  return cipher->cipher->iv_len;
+}
+
 /* Returns the name of the cipher */
 
 const char *silc_cipher_get_name(SilcCipher cipher)