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| /*
| * 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"
|
| /* RSA's DESX */
|
| void DES_xcbc_encrypt(const unsigned char *in, unsigned char *out,
| long length, DES_key_schedule *schedule,
| DES_cblock *ivec, const_DES_cblock *inw,
| const_DES_cblock *outw, int enc)
| {
| register DES_LONG tin0, tin1;
| register DES_LONG tout0, tout1, xor0, xor1;
| register DES_LONG inW0, inW1, outW0, outW1;
| register const unsigned char *in2;
| register long l = length;
| DES_LONG tin[2];
| unsigned char *iv;
|
| in2 = &(*inw)[0];
| c2l(in2, inW0);
| c2l(in2, inW1);
| in2 = &(*outw)[0];
| c2l(in2, outW0);
| c2l(in2, outW1);
|
| iv = &(*ivec)[0];
|
| if (enc) {
| c2l(iv, tout0);
| c2l(iv, tout1);
| for (l -= 8; l >= 0; l -= 8) {
| c2l(in, tin0);
| c2l(in, tin1);
| tin0 ^= tout0 ^ inW0;
| tin[0] = tin0;
| tin1 ^= tout1 ^ inW1;
| tin[1] = tin1;
| DES_encrypt1(tin, schedule, DES_ENCRYPT);
| tout0 = tin[0] ^ outW0;
| l2c(tout0, out);
| tout1 = tin[1] ^ outW1;
| l2c(tout1, out);
| }
| if (l != -8) {
| c2ln(in, tin0, tin1, l + 8);
| tin0 ^= tout0 ^ inW0;
| tin[0] = tin0;
| tin1 ^= tout1 ^ inW1;
| tin[1] = tin1;
| DES_encrypt1(tin, schedule, DES_ENCRYPT);
| tout0 = tin[0] ^ outW0;
| l2c(tout0, out);
| tout1 = tin[1] ^ outW1;
| l2c(tout1, out);
| }
| iv = &(*ivec)[0];
| l2c(tout0, iv);
| l2c(tout1, iv);
| } else {
| c2l(iv, xor0);
| c2l(iv, xor1);
| for (l -= 8; l > 0; l -= 8) {
| c2l(in, tin0);
| tin[0] = tin0 ^ outW0;
| c2l(in, tin1);
| tin[1] = tin1 ^ outW1;
| DES_encrypt1(tin, schedule, DES_DECRYPT);
| tout0 = tin[0] ^ xor0 ^ inW0;
| tout1 = tin[1] ^ xor1 ^ inW1;
| l2c(tout0, out);
| l2c(tout1, out);
| xor0 = tin0;
| xor1 = tin1;
| }
| if (l != -8) {
| c2l(in, tin0);
| tin[0] = tin0 ^ outW0;
| c2l(in, tin1);
| tin[1] = tin1 ^ outW1;
| DES_encrypt1(tin, schedule, DES_DECRYPT);
| tout0 = tin[0] ^ xor0 ^ inW0;
| tout1 = tin[1] ^ xor1 ^ inW1;
| l2cn(tout0, tout1, out, l + 8);
| xor0 = tin0;
| xor1 = tin1;
| }
|
| iv = &(*ivec)[0];
| l2c(xor0, iv);
| l2c(xor1, iv);
| }
| tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0;
| inW0 = inW1 = outW0 = outW1 = 0;
| tin[0] = tin[1] = 0;
| }
|
|
