diff options
Diffstat (limited to 'thirdparty/openssl/crypto/des/ede_cbcm_enc.c')
| -rw-r--r-- | thirdparty/openssl/crypto/des/ede_cbcm_enc.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/thirdparty/openssl/crypto/des/ede_cbcm_enc.c b/thirdparty/openssl/crypto/des/ede_cbcm_enc.c new file mode 100644 index 0000000000..86f27d077a --- /dev/null +++ b/thirdparty/openssl/crypto/des/ede_cbcm_enc.c @@ -0,0 +1,189 @@ +/* ede_cbcm_enc.c */ +/* + * Written by Ben Laurie <ben@algroup.co.uk> for the OpenSSL project 13 Feb + * 1999. + */ +/* ==================================================================== + * Copyright (c) 1999 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 + * licensing@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. + * ==================================================================== + * + * This product includes cryptographic software written by Eric Young + * (eay@cryptsoft.com). This product includes software written by Tim + * Hudson (tjh@cryptsoft.com). + * + */ + +/* + * + * This is an implementation of Triple DES Cipher Block Chaining with Output + * Feedback Masking, by Coppersmith, Johnson and Matyas, (IBM and Certicom). + * + * Note that there is a known attack on this by Biham and Knudsen but it + * takes a lot of work: + * + * http://www.cs.technion.ac.il/users/wwwb/cgi-bin/tr-get.cgi/1998/CS/CS0928.ps.gz + * + */ + +#include <openssl/opensslconf.h> /* To see if OPENSSL_NO_DESCBCM is defined */ + +#ifndef OPENSSL_NO_DESCBCM +# include "des_locl.h" + +void DES_ede3_cbcm_encrypt(const unsigned char *in, unsigned char *out, + long length, DES_key_schedule *ks1, + DES_key_schedule *ks2, DES_key_schedule *ks3, + DES_cblock *ivec1, DES_cblock *ivec2, int enc) +{ + register DES_LONG tin0, tin1; + register DES_LONG tout0, tout1, xor0, xor1, m0, m1; + register long l = length; + DES_LONG tin[2]; + unsigned char *iv1, *iv2; + + iv1 = &(*ivec1)[0]; + iv2 = &(*ivec2)[0]; + + if (enc) { + c2l(iv1, m0); + c2l(iv1, m1); + c2l(iv2, tout0); + c2l(iv2, tout1); + for (l -= 8; l >= -7; l -= 8) { + tin[0] = m0; + tin[1] = m1; + DES_encrypt1(tin, ks3, 1); + m0 = tin[0]; + m1 = tin[1]; + + if (l < 0) { + c2ln(in, tin0, tin1, l + 8); + } else { + c2l(in, tin0); + c2l(in, tin1); + } + tin0 ^= tout0; + tin1 ^= tout1; + + tin[0] = tin0; + tin[1] = tin1; + DES_encrypt1(tin, ks1, 1); + tin[0] ^= m0; + tin[1] ^= m1; + DES_encrypt1(tin, ks2, 0); + tin[0] ^= m0; + tin[1] ^= m1; + DES_encrypt1(tin, ks1, 1); + tout0 = tin[0]; + tout1 = tin[1]; + + l2c(tout0, out); + l2c(tout1, out); + } + iv1 = &(*ivec1)[0]; + l2c(m0, iv1); + l2c(m1, iv1); + + iv2 = &(*ivec2)[0]; + l2c(tout0, iv2); + l2c(tout1, iv2); + } else { + register DES_LONG t0, t1; + + c2l(iv1, m0); + c2l(iv1, m1); + c2l(iv2, xor0); + c2l(iv2, xor1); + for (l -= 8; l >= -7; l -= 8) { + tin[0] = m0; + tin[1] = m1; + DES_encrypt1(tin, ks3, 1); + m0 = tin[0]; + m1 = tin[1]; + + c2l(in, tin0); + c2l(in, tin1); + + t0 = tin0; + t1 = tin1; + + tin[0] = tin0; + tin[1] = tin1; + DES_encrypt1(tin, ks1, 0); + tin[0] ^= m0; + tin[1] ^= m1; + DES_encrypt1(tin, ks2, 1); + tin[0] ^= m0; + tin[1] ^= m1; + DES_encrypt1(tin, ks1, 0); + tout0 = tin[0]; + tout1 = tin[1]; + + tout0 ^= xor0; + tout1 ^= xor1; + if (l < 0) { + l2cn(tout0, tout1, out, l + 8); + } else { + l2c(tout0, out); + l2c(tout1, out); + } + xor0 = t0; + xor1 = t1; + } + + iv1 = &(*ivec1)[0]; + l2c(m0, iv1); + l2c(m1, iv1); + + iv2 = &(*ivec2)[0]; + l2c(xor0, iv2); + l2c(xor1, iv2); + } + tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0; + tin[0] = tin[1] = 0; +} +#endif |