r8302: import mini HEIMDAL into the tree

(This used to be commit 118be28a7aef233799956615a99d1a2a74dac175)

1 files changed, 124 insertions, 0 deletions

diff --git a/source4/heimdal/lib/des/aes.c b/source4/heimdal/lib/des/aes.c
new file mode 100755
index 0000000000..5e0069de9d
--- /dev/null
+++ b/source4/heimdal/lib/des/aes.c
@@ -0,0 +1,124 @@
+/*
+ * 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);
+	}
+    }
+}