summaryrefslogtreecommitdiff
path: root/lib/libcrypto/aes/aes_cbc.c
diff options
context:
space:
mode:
authorBob Beck <beck@cvs.openbsd.org>2002-05-15 02:29:22 +0000
committerBob Beck <beck@cvs.openbsd.org>2002-05-15 02:29:22 +0000
commit88725a157d0d505bdcf049dac88aa4a45546b228 (patch)
treea7472e21781800886b20be28776596064a11eb20 /lib/libcrypto/aes/aes_cbc.c
parent4df88d25cb3419048d1bcf9740d37d4c459aef22 (diff)
import openssl-0.9.7-beta1
Diffstat (limited to 'lib/libcrypto/aes/aes_cbc.c')
-rw-r--r--lib/libcrypto/aes/aes_cbc.c89
1 files changed, 89 insertions, 0 deletions
diff --git a/lib/libcrypto/aes/aes_cbc.c b/lib/libcrypto/aes/aes_cbc.c
new file mode 100644
index 00000000000..3dfd7aba2a1
--- /dev/null
+++ b/lib/libcrypto/aes/aes_cbc.c
@@ -0,0 +1,89 @@
+/* crypto/aes/aes_cbc.c -*- mode:C; c-file-style: "eay" -*- */
+/* ====================================================================
+ * Copyright (c) 1998-2002 The OpenSSL Project. 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. All advertising materials mentioning features or use of this
+ * software must display the following acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * openssl-core@openssl.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED 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 OpenSSL PROJECT OR
+ * ITS 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.
+ * ====================================================================
+ *
+ */
+
+#include <assert.h>
+#include <openssl/aes.h>
+#include "aes_locl.h"
+
+void AES_cbc_encrypt(const unsigned char *in, unsigned char *out,
+ const unsigned long length, const AES_KEY *key,
+ unsigned char *ivec, const int enc) {
+
+ int n;
+ unsigned long len = length;
+ unsigned char tmp[16];
+
+ assert(in && out && key && ivec);
+ assert(length % AES_BLOCK_SIZE == 0);
+ assert((AES_ENCRYPT == enc)||(AES_DECRYPT == enc));
+
+ if (AES_ENCRYPT == enc)
+ while (len > 0) {
+ for(n=0; n < 16; ++n)
+ tmp[n] = in[n] ^ ivec[n];
+ AES_encrypt(tmp, out, key);
+ memcpy(ivec, out, 16);
+ len -= 16;
+ in += 16;
+ out += 16;
+ }
+ else
+ while (len > 0) {
+ memcpy(tmp, in, 16);
+ AES_decrypt(in, out, key);
+ for(n=0; n < 16; ++n)
+ out[n] ^= ivec[n];
+ memcpy(ivec, tmp, 16);
+ len -= 16;
+ in += 16;
+ out += 16;
+ }
+}