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62867571 RS |
1 | /* |
2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. | |
d02b48c6 | 3 | * |
4a8b0c55 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
62867571 RS |
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 | |
d02b48c6 RE |
8 | */ |
9 | ||
10 | #include <stdio.h> | |
b39fc560 | 11 | #include "internal/cryptlib.h" |
9e9e8cb6 RL |
12 | |
13 | #ifndef OPENSSL_NO_DES | |
14 | ||
0f113f3e MC |
15 | # include <openssl/evp.h> |
16 | # include <openssl/objects.h> | |
25f2138b | 17 | # include "crypto/evp.h" |
0f113f3e | 18 | # include <openssl/des.h> |
d02b48c6 | 19 | |
1921eaad | 20 | static int desx_cbc_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
0f113f3e | 21 | const unsigned char *iv, int enc); |
be06a934 | 22 | static int desx_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
0f113f3e | 23 | const unsigned char *in, size_t inl); |
dbad1690 | 24 | |
0f113f3e MC |
25 | typedef struct { |
26 | DES_key_schedule ks; /* key schedule */ | |
c2e4f17c RL |
27 | DES_cblock inw; |
28 | DES_cblock outw; | |
0f113f3e | 29 | } DESX_CBC_KEY; |
dbad1690 | 30 | |
6435f0f6 | 31 | # define data(ctx) EVP_C_DATA(DESX_CBC_KEY,ctx) |
dbad1690 | 32 | |
0f113f3e MC |
33 | static const EVP_CIPHER d_xcbc_cipher = { |
34 | NID_desx_cbc, | |
35 | 8, 24, 8, | |
36 | EVP_CIPH_CBC_MODE, | |
37 | desx_cbc_init_key, | |
38 | desx_cbc_cipher, | |
39 | NULL, | |
40 | sizeof(DESX_CBC_KEY), | |
41 | EVP_CIPHER_set_asn1_iv, | |
42 | EVP_CIPHER_get_asn1_iv, | |
43 | NULL, | |
44 | NULL | |
45 | }; | |
d02b48c6 | 46 | |
13588350 | 47 | const EVP_CIPHER *EVP_desx_cbc(void) |
0f113f3e | 48 | { |
26a7d938 | 49 | return &d_xcbc_cipher; |
0f113f3e MC |
50 | } |
51 | ||
1921eaad | 52 | static int desx_cbc_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
0f113f3e MC |
53 | const unsigned char *iv, int enc) |
54 | { | |
55 | DES_cblock *deskey = (DES_cblock *)key; | |
edf0bfb5 | 56 | |
0f113f3e MC |
57 | DES_set_key_unchecked(deskey, &data(ctx)->ks); |
58 | memcpy(&data(ctx)->inw[0], &key[8], 8); | |
59 | memcpy(&data(ctx)->outw[0], &key[16], 8); | |
360370d9 | 60 | |
0f113f3e MC |
61 | return 1; |
62 | } | |
d02b48c6 | 63 | |
be06a934 | 64 | static int desx_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
0f113f3e MC |
65 | const unsigned char *in, size_t inl) |
66 | { | |
67 | while (inl >= EVP_MAXCHUNK) { | |
68 | DES_xcbc_encrypt(in, out, (long)EVP_MAXCHUNK, &data(ctx)->ks, | |
6435f0f6 RL |
69 | (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), |
70 | &data(ctx)->inw, &data(ctx)->outw, | |
71 | EVP_CIPHER_CTX_encrypting(ctx)); | |
0f113f3e MC |
72 | inl -= EVP_MAXCHUNK; |
73 | in += EVP_MAXCHUNK; | |
74 | out += EVP_MAXCHUNK; | |
75 | } | |
76 | if (inl) | |
77 | DES_xcbc_encrypt(in, out, (long)inl, &data(ctx)->ks, | |
6435f0f6 RL |
78 | (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), |
79 | &data(ctx)->inw, &data(ctx)->outw, | |
80 | EVP_CIPHER_CTX_encrypting(ctx)); | |
0f113f3e MC |
81 | return 1; |
82 | } | |
d02f751c | 83 | #endif |