/src/openssl30/crypto/des/ncbc_enc.c
Line | Count | Source (jump to first uncovered line) |
1 | | /* |
2 | | * Copyright 1998-2016 The OpenSSL Project Authors. All Rights Reserved. |
3 | | * |
4 | | * Licensed under the Apache License 2.0 (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 | | /*- |
11 | | * #included by: |
12 | | * cbc_enc.c (DES_cbc_encrypt) |
13 | | * des_enc.c (DES_ncbc_encrypt) |
14 | | */ |
15 | | |
16 | | #include "des_local.h" |
17 | | |
18 | | #ifdef CBC_ENC_C__DONT_UPDATE_IV |
19 | | void DES_cbc_encrypt(const unsigned char *in, unsigned char *out, long length, |
20 | | DES_key_schedule *_schedule, DES_cblock *ivec, int enc) |
21 | | #else |
22 | | void DES_ncbc_encrypt(const unsigned char *in, unsigned char *out, |
23 | | long length, DES_key_schedule *_schedule, |
24 | | DES_cblock *ivec, int enc) |
25 | | #endif |
26 | 0 | { |
27 | 0 | register DES_LONG tin0, tin1; |
28 | 0 | register DES_LONG tout0, tout1, xor0, xor1; |
29 | 0 | register long l = length; |
30 | 0 | DES_LONG tin[2]; |
31 | 0 | unsigned char *iv; |
32 | |
|
33 | 0 | iv = &(*ivec)[0]; |
34 | |
|
35 | 0 | if (enc) { |
36 | 0 | c2l(iv, tout0); |
37 | 0 | c2l(iv, tout1); |
38 | 0 | for (l -= 8; l >= 0; l -= 8) { |
39 | 0 | c2l(in, tin0); |
40 | 0 | c2l(in, tin1); |
41 | 0 | tin0 ^= tout0; |
42 | 0 | tin[0] = tin0; |
43 | 0 | tin1 ^= tout1; |
44 | 0 | tin[1] = tin1; |
45 | 0 | DES_encrypt1((DES_LONG *)tin, _schedule, DES_ENCRYPT); |
46 | 0 | tout0 = tin[0]; |
47 | 0 | l2c(tout0, out); |
48 | 0 | tout1 = tin[1]; |
49 | 0 | l2c(tout1, out); |
50 | 0 | } |
51 | 0 | if (l != -8) { |
52 | 0 | c2ln(in, tin0, tin1, l + 8); |
53 | 0 | tin0 ^= tout0; |
54 | 0 | tin[0] = tin0; |
55 | 0 | tin1 ^= tout1; |
56 | 0 | tin[1] = tin1; |
57 | 0 | DES_encrypt1((DES_LONG *)tin, _schedule, DES_ENCRYPT); |
58 | 0 | tout0 = tin[0]; |
59 | 0 | l2c(tout0, out); |
60 | 0 | tout1 = tin[1]; |
61 | 0 | l2c(tout1, out); |
62 | 0 | } |
63 | 0 | #ifndef CBC_ENC_C__DONT_UPDATE_IV |
64 | 0 | iv = &(*ivec)[0]; |
65 | 0 | l2c(tout0, iv); |
66 | 0 | l2c(tout1, iv); |
67 | 0 | #endif |
68 | 0 | } else { |
69 | 0 | c2l(iv, xor0); |
70 | 0 | c2l(iv, xor1); |
71 | 0 | for (l -= 8; l >= 0; l -= 8) { |
72 | 0 | c2l(in, tin0); |
73 | 0 | tin[0] = tin0; |
74 | 0 | c2l(in, tin1); |
75 | 0 | tin[1] = tin1; |
76 | 0 | DES_encrypt1((DES_LONG *)tin, _schedule, DES_DECRYPT); |
77 | 0 | tout0 = tin[0] ^ xor0; |
78 | 0 | tout1 = tin[1] ^ xor1; |
79 | 0 | l2c(tout0, out); |
80 | 0 | l2c(tout1, out); |
81 | 0 | xor0 = tin0; |
82 | 0 | xor1 = tin1; |
83 | 0 | } |
84 | 0 | if (l != -8) { |
85 | 0 | c2l(in, tin0); |
86 | 0 | tin[0] = tin0; |
87 | 0 | c2l(in, tin1); |
88 | 0 | tin[1] = tin1; |
89 | 0 | DES_encrypt1((DES_LONG *)tin, _schedule, DES_DECRYPT); |
90 | 0 | tout0 = tin[0] ^ xor0; |
91 | 0 | tout1 = tin[1] ^ xor1; |
92 | 0 | l2cn(tout0, tout1, out, l + 8); |
93 | 0 | #ifndef CBC_ENC_C__DONT_UPDATE_IV |
94 | 0 | xor0 = tin0; |
95 | 0 | xor1 = tin1; |
96 | 0 | #endif |
97 | 0 | } |
98 | 0 | #ifndef CBC_ENC_C__DONT_UPDATE_IV |
99 | 0 | iv = &(*ivec)[0]; |
100 | 0 | l2c(xor0, iv); |
101 | 0 | l2c(xor1, iv); |
102 | 0 | #endif |
103 | 0 | } |
104 | 0 | tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0; |
105 | 0 | tin[0] = tin[1] = 0; |
106 | 0 | } |