--- /dev/null
+/* ====================================================================
+ * Copyright (c) 2008 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 <openssl/crypto.h>
+#include "modes_lcl.h"
+#include <string.h>
+
+#ifndef MODES_DEBUG
+# ifndef NDEBUG
+# define NDEBUG
+# endif
+#endif
+#include <assert.h>
+
+#ifndef STRICT_ALIGNMENT
+# define STRICT_ALIGNMENT 0
+#endif
+
+void CRYPTO_cbc128_encrypt(const unsigned char *in, unsigned char *out,
+ size_t len, const void *key,
+ unsigned char ivec[16], block128_f block)
+{
+ size_t n;
+ const unsigned char *iv = ivec;
+
+ assert(in && out && key && ivec);
+
+#if !defined(OPENSSL_SMALL_FOOTPRINT)
+ if (STRICT_ALIGNMENT &&
+ ((size_t)in|(size_t)out|(size_t)ivec)%sizeof(size_t) != 0) {
+ while (len>=16) {
+ for(n=0; n<16; ++n)
+ out[n] = in[n] ^ iv[n];
+ (*block)(out, out, key);
+ iv = out;
+ len -= 16;
+ in += 16;
+ out += 16;
+ }
+ } else {
+ while (len>=16) {
+ for(n=0; n<16; n+=sizeof(size_t))
+ *(size_t*)(out+n) =
+ *(size_t*)(in+n) ^ *(size_t*)(iv+n);
+ (*block)(out, out, key);
+ iv = out;
+ len -= 16;
+ in += 16;
+ out += 16;
+ }
+ }
+#endif
+ while (len) {
+ for(n=0; n<16 && n<len; ++n)
+ out[n] = in[n] ^ iv[n];
+ for(; n<16; ++n)
+ out[n] = iv[n];
+ (*block)(out, out, key);
+ iv = out;
+ if (len<=16) break;
+ len -= 16;
+ in += 16;
+ out += 16;
+ }
+ memcpy(ivec,iv,16);
+}
+
+void CRYPTO_cbc128_decrypt(const unsigned char *in, unsigned char *out,
+ size_t len, const void *key,
+ unsigned char ivec[16], block128_f block)
+{
+ size_t n;
+ union { size_t t[16/sizeof(size_t)]; unsigned char c[16]; } tmp;
+
+ assert(in && out && key && ivec);
+
+#if !defined(OPENSSL_SMALL_FOOTPRINT)
+ if (in != out) {
+ const unsigned char *iv = ivec;
+
+ if (STRICT_ALIGNMENT &&
+ ((size_t)in|(size_t)out|(size_t)ivec)%sizeof(size_t) != 0) {
+ while (len>=16) {
+ (*block)(in, out, key);
+ for(n=0; n<16; ++n)
+ out[n] ^= iv[n];
+ iv = in;
+ len -= 16;
+ in += 16;
+ out += 16;
+ }
+ }
+ else if (16%sizeof(size_t) == 0) { /* always true */
+ while (len>=16) {
+ size_t *out_t=(size_t *)out, *iv_t=(size_t *)iv;
+
+ (*block)(in, out, key);
+ for(n=0; n<16/sizeof(size_t); n++)
+ out_t[n] ^= iv_t[n];
+ iv = in;
+ len -= 16;
+ in += 16;
+ out += 16;
+ }
+ }
+ memcpy(ivec,iv,16);
+ } else {
+ if (STRICT_ALIGNMENT &&
+ ((size_t)in|(size_t)out|(size_t)ivec)%sizeof(size_t) != 0) {
+ unsigned char c;
+ while (len>=16) {
+ (*block)(in, tmp.c, key);
+ for(n=0; n<16; ++n) {
+ c = in[n];
+ out[n] = tmp.c[n] ^ ivec[n];
+ ivec[n] = c;
+ }
+ len -= 16;
+ in += 16;
+ out += 16;
+ }
+ }
+ else if (16%sizeof(size_t) == 0) { /* always true */
+ while (len>=16) {
+ size_t c, *out_t=(size_t *)out, *ivec_t=(size_t *)ivec;
+ const size_t *in_t=(const size_t *)in;
+
+ (*block)(in, tmp.c, key);
+ for(n=0; n<16/sizeof(size_t); n++) {
+ c = in_t[n];
+ out_t[n] = tmp.t[n] ^ ivec_t[n];
+ ivec_t[n] = c;
+ }
+ len -= 16;
+ in += 16;
+ out += 16;
+ }
+ }
+ }
+#endif
+ while (len) {
+ unsigned char c;
+ (*block)(in, tmp.c, key);
+ for(n=0; n<16 && n<len; ++n) {
+ c = in[n];
+ out[n] = tmp.c[n] ^ ivec[n];
+ ivec[n] = c;
+ }
+ if (len<=16) {
+ for (; n<16; ++n)
+ ivec[n] = in[n];
+ break;
+ }
+ len -= 16;
+ in += 16;
+ out += 16;
+ }
+}
projects / cassiopeia.git / blobdiff