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authorHeimdal Import User <samba-bugs@samba.org>2005-07-11 01:16:55 +0000
committerGerald (Jerry) Carter <jerry@samba.org>2007-10-10 13:19:33 -0500
commit954c01728e0c7485b72c9a5d5737e5f6bd0cf0b9 (patch)
treefc11a048c8a582e2ca66415ff04dacf74f9abf22 /source4/heimdal/lib/des/aes.c
parent7ead5ab06cea9f33e954a4579163262f97ea06ff (diff)
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r8302: import mini HEIMDAL into the tree
(This used to be commit 118be28a7aef233799956615a99d1a2a74dac175)
Diffstat (limited to 'source4/heimdal/lib/des/aes.c')
-rwxr-xr-xsource4/heimdal/lib/des/aes.c124
1 files changed, 124 insertions, 0 deletions
diff --git a/source4/heimdal/lib/des/aes.c b/source4/heimdal/lib/des/aes.c
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+++ b/source4/heimdal/lib/des/aes.c
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+/*
+ * Copyright (c) 2003 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * 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. Neither the name of the Institute nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS 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 INSTITUTE OR 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+
+RCSID("$Id: aes.c,v 1.5 2005/06/18 22:46:35 lha Exp $");
+#endif
+
+#ifdef KRB5
+#include <krb5-types.h>
+#endif
+
+#include <string.h>
+
+#include "rijndael-alg-fst.h"
+#include "aes.h"
+
+int
+AES_set_encrypt_key(const unsigned char *userkey, const int bits, AES_KEY *key)
+{
+ key->rounds = rijndaelKeySetupEnc(key->key, userkey, bits);
+ if (key->rounds == 0)
+ return -1;
+ return 0;
+}
+
+int
+AES_set_decrypt_key(const unsigned char *userkey, const int bits, AES_KEY *key)
+{
+ key->rounds = rijndaelKeySetupDec(key->key, userkey, bits);
+ if (key->rounds == 0)
+ return -1;
+ return 0;
+}
+
+void
+AES_encrypt(const unsigned char *in, unsigned char *out, const AES_KEY *key)
+{
+ rijndaelEncrypt(key->key, key->rounds, in, out);
+}
+
+void
+AES_decrypt(const unsigned char *in, unsigned char *out, const AES_KEY *key)
+{
+ rijndaelDecrypt(key->key, key->rounds, in, out);
+}
+
+void
+AES_cbc_encrypt(const unsigned char *in, unsigned char *out,
+ unsigned long size, const AES_KEY *key,
+ unsigned char *iv, int forward_encrypt)
+{
+ unsigned char tmp[AES_BLOCK_SIZE];
+ int i;
+
+ if (forward_encrypt) {
+ while (size >= AES_BLOCK_SIZE) {
+ for (i = 0; i < AES_BLOCK_SIZE; i++)
+ tmp[i] = in[i] ^ iv[i];
+ AES_encrypt(tmp, out, key);
+ memcpy(iv, out, AES_BLOCK_SIZE);
+ size -= AES_BLOCK_SIZE;
+ in += AES_BLOCK_SIZE;
+ out += AES_BLOCK_SIZE;
+ }
+ if (size) {
+ for (i = 0; i < size; i++)
+ tmp[i] = in[i] ^ iv[i];
+ for (i = size; i < AES_BLOCK_SIZE; i++)
+ tmp[i] = iv[i];
+ AES_encrypt(tmp, out, key);
+ memcpy(iv, out, AES_BLOCK_SIZE);
+ }
+ } else {
+ while (size >= AES_BLOCK_SIZE) {
+ memcpy(tmp, in, AES_BLOCK_SIZE);
+ AES_decrypt(tmp, out, key);
+ for (i = 0; i < AES_BLOCK_SIZE; i++)
+ out[i] ^= iv[i];
+ memcpy(iv, tmp, AES_BLOCK_SIZE);
+ size -= AES_BLOCK_SIZE;
+ in += AES_BLOCK_SIZE;
+ out += AES_BLOCK_SIZE;
+ }
+ if (size) {
+ memcpy(tmp, in, AES_BLOCK_SIZE);
+ AES_decrypt(tmp, out, key);
+ for (i = 0; i < size; i++)
+ out[i] ^= iv[i];
+ memcpy(iv, tmp, AES_BLOCK_SIZE);
+ }
+ }
+}