[331] | 1 | /*
|
---|
| 2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
|
---|
| 3 | *
|
---|
| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
|
---|
| 5 | * this file except in compliance with the License. You can obtain a copy
|
---|
| 6 | * in the file LICENSE in the source distribution or at
|
---|
| 7 | * https://www.openssl.org/source/license.html
|
---|
| 8 | */
|
---|
| 9 |
|
---|
| 10 | #include "des_locl.h"
|
---|
| 11 |
|
---|
| 12 | /* RSA's DESX */
|
---|
| 13 |
|
---|
| 14 | void DES_xcbc_encrypt(const unsigned char *in, unsigned char *out,
|
---|
| 15 | long length, DES_key_schedule *schedule,
|
---|
| 16 | DES_cblock *ivec, const_DES_cblock *inw,
|
---|
| 17 | const_DES_cblock *outw, int enc)
|
---|
| 18 | {
|
---|
| 19 | register DES_LONG tin0, tin1;
|
---|
| 20 | register DES_LONG tout0, tout1, xor0, xor1;
|
---|
| 21 | register DES_LONG inW0, inW1, outW0, outW1;
|
---|
| 22 | register const unsigned char *in2;
|
---|
| 23 | register long l = length;
|
---|
| 24 | DES_LONG tin[2];
|
---|
| 25 | unsigned char *iv;
|
---|
| 26 |
|
---|
| 27 | in2 = &(*inw)[0];
|
---|
| 28 | c2l(in2, inW0);
|
---|
| 29 | c2l(in2, inW1);
|
---|
| 30 | in2 = &(*outw)[0];
|
---|
| 31 | c2l(in2, outW0);
|
---|
| 32 | c2l(in2, outW1);
|
---|
| 33 |
|
---|
| 34 | iv = &(*ivec)[0];
|
---|
| 35 |
|
---|
| 36 | if (enc) {
|
---|
| 37 | c2l(iv, tout0);
|
---|
| 38 | c2l(iv, tout1);
|
---|
| 39 | for (l -= 8; l >= 0; l -= 8) {
|
---|
| 40 | c2l(in, tin0);
|
---|
| 41 | c2l(in, tin1);
|
---|
| 42 | tin0 ^= tout0 ^ inW0;
|
---|
| 43 | tin[0] = tin0;
|
---|
| 44 | tin1 ^= tout1 ^ inW1;
|
---|
| 45 | tin[1] = tin1;
|
---|
| 46 | DES_encrypt1(tin, schedule, DES_ENCRYPT);
|
---|
| 47 | tout0 = tin[0] ^ outW0;
|
---|
| 48 | l2c(tout0, out);
|
---|
| 49 | tout1 = tin[1] ^ outW1;
|
---|
| 50 | l2c(tout1, out);
|
---|
| 51 | }
|
---|
| 52 | if (l != -8) {
|
---|
| 53 | c2ln(in, tin0, tin1, l + 8);
|
---|
| 54 | tin0 ^= tout0 ^ inW0;
|
---|
| 55 | tin[0] = tin0;
|
---|
| 56 | tin1 ^= tout1 ^ inW1;
|
---|
| 57 | tin[1] = tin1;
|
---|
| 58 | DES_encrypt1(tin, schedule, DES_ENCRYPT);
|
---|
| 59 | tout0 = tin[0] ^ outW0;
|
---|
| 60 | l2c(tout0, out);
|
---|
| 61 | tout1 = tin[1] ^ outW1;
|
---|
| 62 | l2c(tout1, out);
|
---|
| 63 | }
|
---|
| 64 | iv = &(*ivec)[0];
|
---|
| 65 | l2c(tout0, iv);
|
---|
| 66 | l2c(tout1, iv);
|
---|
| 67 | } else {
|
---|
| 68 | c2l(iv, xor0);
|
---|
| 69 | c2l(iv, xor1);
|
---|
| 70 | for (l -= 8; l > 0; l -= 8) {
|
---|
| 71 | c2l(in, tin0);
|
---|
| 72 | tin[0] = tin0 ^ outW0;
|
---|
| 73 | c2l(in, tin1);
|
---|
| 74 | tin[1] = tin1 ^ outW1;
|
---|
| 75 | DES_encrypt1(tin, schedule, DES_DECRYPT);
|
---|
| 76 | tout0 = tin[0] ^ xor0 ^ inW0;
|
---|
| 77 | tout1 = tin[1] ^ xor1 ^ inW1;
|
---|
| 78 | l2c(tout0, out);
|
---|
| 79 | l2c(tout1, out);
|
---|
| 80 | xor0 = tin0;
|
---|
| 81 | xor1 = tin1;
|
---|
| 82 | }
|
---|
| 83 | if (l != -8) {
|
---|
| 84 | c2l(in, tin0);
|
---|
| 85 | tin[0] = tin0 ^ outW0;
|
---|
| 86 | c2l(in, tin1);
|
---|
| 87 | tin[1] = tin1 ^ outW1;
|
---|
| 88 | DES_encrypt1(tin, schedule, DES_DECRYPT);
|
---|
| 89 | tout0 = tin[0] ^ xor0 ^ inW0;
|
---|
| 90 | tout1 = tin[1] ^ xor1 ^ inW1;
|
---|
| 91 | l2cn(tout0, tout1, out, l + 8);
|
---|
| 92 | xor0 = tin0;
|
---|
| 93 | xor1 = tin1;
|
---|
| 94 | }
|
---|
| 95 |
|
---|
| 96 | iv = &(*ivec)[0];
|
---|
| 97 | l2c(xor0, iv);
|
---|
| 98 | l2c(xor1, iv);
|
---|
| 99 | }
|
---|
| 100 | tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0;
|
---|
| 101 | inW0 = inW1 = outW0 = outW1 = 0;
|
---|
| 102 | tin[0] = tin[1] = 0;
|
---|
| 103 | }
|
---|