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author | RĂ©mi Verschelde <remi@verschelde.fr> | 2016-10-16 11:52:09 +0200 |
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committer | GitHub <noreply@github.com> | 2016-10-16 11:52:09 +0200 |
commit | 89132224a651c0e0d4121270f63decb9a678ff88 (patch) | |
tree | 224a008705391b6e5b560d2c0426380651756383 /thirdparty/openssl/crypto/modes/ofb128.c | |
parent | eb8d19ba740c11acf0f26080405fc5cd827a2d41 (diff) | |
parent | e57042e8a93e4f3d65cc91633f5af0daedf69a2a (diff) |
Merge pull request #6830 from akien-mga/thirdparty
Move most "drivers" as toggleable "modules" and split their thirdparty libraries in an own tree
Diffstat (limited to 'thirdparty/openssl/crypto/modes/ofb128.c')
-rw-r--r-- | thirdparty/openssl/crypto/modes/ofb128.c | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/thirdparty/openssl/crypto/modes/ofb128.c b/thirdparty/openssl/crypto/modes/ofb128.c new file mode 100644 index 0000000000..4dbaccd7a6 --- /dev/null +++ b/thirdparty/openssl/crypto/modes/ofb128.c @@ -0,0 +1,124 @@ +/* ==================================================================== + * 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> + +/* + * The input and output encrypted as though 128bit ofb mode is being used. + * The extra state information to record how much of the 128bit block we have + * used is contained in *num; + */ +void CRYPTO_ofb128_encrypt(const unsigned char *in, unsigned char *out, + size_t len, const void *key, + unsigned char ivec[16], int *num, block128_f block) +{ + unsigned int n; + size_t l = 0; + + assert(in && out && key && ivec && num); + + n = *num; + +#if !defined(OPENSSL_SMALL_FOOTPRINT) + if (16 % sizeof(size_t) == 0) { /* always true actually */ + do { + while (n && len) { + *(out++) = *(in++) ^ ivec[n]; + --len; + n = (n + 1) % 16; + } +# if defined(STRICT_ALIGNMENT) + if (((size_t)in | (size_t)out | (size_t)ivec) % sizeof(size_t) != + 0) + break; +# endif + while (len >= 16) { + (*block) (ivec, ivec, key); + for (; n < 16; n += sizeof(size_t)) + *(size_t *)(out + n) = + *(size_t *)(in + n) ^ *(size_t *)(ivec + n); + len -= 16; + out += 16; + in += 16; + n = 0; + } + if (len) { + (*block) (ivec, ivec, key); + while (len--) { + out[n] = in[n] ^ ivec[n]; + ++n; + } + } + *num = n; + return; + } while (0); + } + /* the rest would be commonly eliminated by x86* compiler */ +#endif + while (l < len) { + if (n == 0) { + (*block) (ivec, ivec, key); + } + out[l] = in[l] ^ ivec[n]; + ++l; + n = (n + 1) % 16; + } + + *num = n; +} |