/* * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. * * Licensed under the OpenSSL license (the "License"). You may not use * this file except in compliance with the License. You can obtain a copy * in the file LICENSE in the source distribution or at * https://www.openssl.org/source/license.html */ #include "des_local.h" DES_LONG DES_cbc_cksum(const unsigned char *in, DES_cblock *output, long length, DES_key_schedule *schedule, const_DES_cblock *ivec) { register DES_LONG tout0, tout1, tin0, tin1; register long l = length; DES_LONG tin[2]; unsigned char *out = &(*output)[0]; const unsigned char *iv = &(*ivec)[0]; c2l(iv, tout0); c2l(iv, tout1); for (; l > 0; l -= 8) { if (l >= 8) { c2l(in, tin0); c2l(in, tin1); } else c2ln(in, tin0, tin1, l); tin0 ^= tout0; tin[0] = tin0; tin1 ^= tout1; tin[1] = tin1; DES_encrypt1((DES_LONG *)tin, schedule, DES_ENCRYPT); tout0 = tin[0]; tout1 = tin[1]; } if (out != NULL) { l2c(tout0, out); l2c(tout1, out); } tout0 = tin0 = tin1 = tin[0] = tin[1] = 0; /* * Transform the data in tout1 so that it will match the return value * that the MIT Kerberos mit_des_cbc_cksum API returns. */ tout1 = ((tout1 >> 24L) & 0x000000FF) | ((tout1 >> 8L) & 0x0000FF00) | ((tout1 << 8L) & 0x00FF0000) | ((tout1 << 24L) & 0xFF000000); return tout1; } |