Index: openssl/crypto/modes/cbc128.c |
=================================================================== |
--- openssl/crypto/modes/cbc128.c (revision 0) |
+++ openssl/crypto/modes/cbc128.c (revision 0) |
@@ -0,0 +1,206 @@ |
+/* ==================================================================== |
+ * 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 "modes.h" |
+#include <string.h> |
+ |
+#ifndef MODES_DEBUG |
+# ifndef NDEBUG |
+# define NDEBUG |
+# endif |
+#endif |
+#include <assert.h> |
+ |
+#define STRICT_ALIGNMENT 1 |
+#if defined(__i386) || defined(__i386__) || \ |
+ defined(__x86_64) || defined(__x86_64__) || \ |
+ defined(_M_IX86) || defined(_M_AMD64) || defined(_M_X64) || \ |
+ defined(__s390__) || defined(__s390x__) |
+# undef 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 align; 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 { |
+ while (len>=16) { |
+ (*block)(in, out, key); |
+ for(n=0; n<16; n+=sizeof(size_t)) |
+ *(size_t *)(out+n) ^= *(size_t *)(iv+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 { |
+ size_t c; |
+ while (len>=16) { |
+ (*block)(in, tmp.c, key); |
+ for(n=0; n<16; n+=sizeof(size_t)) { |
+ c = *(size_t *)(in+n); |
+ *(size_t *)(out+n) = |
+ *(size_t *)(tmp.c+n) ^ *(size_t *)(ivec+n); |
+ *(size_t *)(ivec+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; |
+ } |
+} |