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d02b48c6 | 1 | /* crypto/evp/e_ofb_3d.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
3 | * All rights reserved. |
4 | * | |
5 | * This package is an SSL implementation written | |
6 | * by Eric Young (eay@cryptsoft.com). | |
7 | * The implementation was written so as to conform with Netscapes SSL. | |
8 | * | |
9 | * This library is free for commercial and non-commercial use as long as | |
10 | * the following conditions are aheared to. The following conditions | |
11 | * apply to all code found in this distribution, be it the RC4, RSA, | |
12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
13 | * included with this distribution is covered by the same copyright terms | |
14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
15 | * | |
16 | * Copyright remains Eric Young's, and as such any Copyright notices in | |
17 | * the code are not to be removed. | |
18 | * If this package is used in a product, Eric Young should be given attribution | |
19 | * as the author of the parts of the library used. | |
20 | * This can be in the form of a textual message at program startup or | |
21 | * in documentation (online or textual) provided with the package. | |
22 | * | |
23 | * Redistribution and use in source and binary forms, with or without | |
24 | * modification, are permitted provided that the following conditions | |
25 | * are met: | |
26 | * 1. Redistributions of source code must retain the copyright | |
27 | * notice, this list of conditions and the following disclaimer. | |
28 | * 2. Redistributions in binary form must reproduce the above copyright | |
29 | * notice, this list of conditions and the following disclaimer in the | |
30 | * documentation and/or other materials provided with the distribution. | |
31 | * 3. All advertising materials mentioning features or use of this software | |
32 | * must display the following acknowledgement: | |
33 | * "This product includes cryptographic software written by | |
34 | * Eric Young (eay@cryptsoft.com)" | |
35 | * The word 'cryptographic' can be left out if the rouines from the library | |
36 | * being used are not cryptographic related :-). | |
37 | * 4. If you include any Windows specific code (or a derivative thereof) from | |
38 | * the apps directory (application code) you must include an acknowledgement: | |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
40 | * | |
41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND | |
42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
51 | * SUCH DAMAGE. | |
52 | * | |
53 | * The licence and distribution terms for any publically available version or | |
54 | * derivative of this code cannot be changed. i.e. this code cannot simply be | |
55 | * copied and put under another distribution licence | |
56 | * [including the GNU Public Licence.] | |
57 | */ | |
58 | ||
d02f751c | 59 | #ifndef NO_DES |
d02b48c6 RE |
60 | #include <stdio.h> |
61 | #include "cryptlib.h" | |
ec577822 BM |
62 | #include <openssl/evp.h> |
63 | #include <openssl/objects.h> | |
d02b48c6 | 64 | |
d02b48c6 RE |
65 | static void des_ede_ofb_init_key(EVP_CIPHER_CTX *ctx, unsigned char *key, |
66 | unsigned char *iv,int enc); | |
67 | static void des_ede3_ofb_init_key(EVP_CIPHER_CTX *ctx, unsigned char *key, | |
68 | unsigned char *iv,int enc); | |
69 | static void des_ede_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, | |
70 | unsigned char *in, unsigned int inl); | |
d02b48c6 RE |
71 | static EVP_CIPHER d_ede_ofb_cipher2= |
72 | { | |
73 | NID_des_ede_ofb64, | |
74 | 1,16,8, | |
75 | des_ede_ofb_init_key, | |
76 | des_ede_ofb_cipher, | |
58964a49 RE |
77 | NULL, |
78 | sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+ | |
79 | sizeof((((EVP_CIPHER_CTX *)NULL)->c.des_ede)), | |
80 | EVP_CIPHER_set_asn1_iv, | |
81 | EVP_CIPHER_get_asn1_iv, | |
d02b48c6 RE |
82 | }; |
83 | ||
84 | static EVP_CIPHER d_ede3_ofb_cipher3= | |
85 | { | |
86 | NID_des_ede3_ofb64, | |
87 | 1,24,8, | |
88 | des_ede3_ofb_init_key, | |
89 | des_ede_ofb_cipher, | |
58964a49 RE |
90 | NULL, |
91 | sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+ | |
92 | sizeof((((EVP_CIPHER_CTX *)NULL)->c.des_ede)), | |
93 | EVP_CIPHER_set_asn1_iv, | |
94 | EVP_CIPHER_get_asn1_iv, | |
d02b48c6 RE |
95 | }; |
96 | ||
6b691a5c | 97 | EVP_CIPHER *EVP_des_ede_ofb(void) |
d02b48c6 RE |
98 | { |
99 | return(&d_ede_ofb_cipher2); | |
100 | } | |
101 | ||
6b691a5c | 102 | EVP_CIPHER *EVP_des_ede3_ofb(void) |
d02b48c6 RE |
103 | { |
104 | return(&d_ede3_ofb_cipher3); | |
105 | } | |
106 | ||
6b691a5c UM |
107 | static void des_ede_ofb_init_key(EVP_CIPHER_CTX *ctx, unsigned char *key, |
108 | unsigned char *iv, int enc) | |
d02b48c6 | 109 | { |
edf0bfb5 BM |
110 | des_cblock *deskey = (des_cblock *)key; |
111 | ||
58964a49 | 112 | ctx->num=0; |
d02b48c6 RE |
113 | |
114 | if (iv != NULL) | |
58964a49 RE |
115 | memcpy(&(ctx->oiv[0]),iv,8); |
116 | memcpy(&(ctx->iv[0]),&(ctx->oiv[0]),8); | |
edf0bfb5 | 117 | if (deskey != NULL) |
d02b48c6 | 118 | { |
edf0bfb5 BM |
119 | des_set_key(&deskey[0],ctx->c.des_ede.ks1); |
120 | des_set_key(&deskey[1],ctx->c.des_ede.ks2); | |
58964a49 RE |
121 | memcpy( (char *)ctx->c.des_ede.ks3, |
122 | (char *)ctx->c.des_ede.ks1, | |
123 | sizeof(ctx->c.des_ede.ks1)); | |
d02b48c6 RE |
124 | } |
125 | } | |
126 | ||
6b691a5c UM |
127 | static void des_ede3_ofb_init_key(EVP_CIPHER_CTX *ctx, unsigned char *key, |
128 | unsigned char *iv, int enc) | |
d02b48c6 | 129 | { |
edf0bfb5 BM |
130 | des_cblock *deskey = (des_cblock *)key; |
131 | ||
58964a49 | 132 | ctx->num=0; |
d02b48c6 RE |
133 | |
134 | if (iv != NULL) | |
58964a49 RE |
135 | memcpy(&(ctx->oiv[0]),iv,8); |
136 | memcpy(&(ctx->iv[0]),&(ctx->oiv[0]),8); | |
edf0bfb5 | 137 | if (deskey != NULL) |
d02b48c6 | 138 | { |
edf0bfb5 BM |
139 | des_set_key(&deskey[0],ctx->c.des_ede.ks1); |
140 | des_set_key(&deskey[1],ctx->c.des_ede.ks2); | |
141 | des_set_key(&deskey[2],ctx->c.des_ede.ks3); | |
d02b48c6 RE |
142 | } |
143 | } | |
144 | ||
6b691a5c UM |
145 | static void des_ede_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
146 | unsigned char *in, unsigned int inl) | |
d02b48c6 | 147 | { |
08853ba8 BL |
148 | des_ede3_ofb64_encrypt(in,out,inl,ctx->c.des_ede.ks1, |
149 | ctx->c.des_ede.ks2, ctx->c.des_ede.ks3, | |
edf0bfb5 | 150 | (des_cblock *)&(ctx->iv[0]),&ctx->num); |
d02b48c6 | 151 | } |
d02f751c | 152 | #endif |