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58964a49 | 1 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
2 | * All rights reserved. |
3 | * | |
4 | * This package is an SSL implementation written | |
5 | * by Eric Young (eay@cryptsoft.com). | |
6 | * The implementation was written so as to conform with Netscapes SSL. | |
0f113f3e | 7 | * |
d02b48c6 RE |
8 | * This library is free for commercial and non-commercial use as long as |
9 | * the following conditions are aheared to. The following conditions | |
10 | * apply to all code found in this distribution, be it the RC4, RSA, | |
11 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
12 | * included with this distribution is covered by the same copyright terms | |
13 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
0f113f3e | 14 | * |
d02b48c6 RE |
15 | * Copyright remains Eric Young's, and as such any Copyright notices in |
16 | * the code are not to be removed. | |
17 | * If this package is used in a product, Eric Young should be given attribution | |
18 | * as the author of the parts of the library used. | |
19 | * This can be in the form of a textual message at program startup or | |
20 | * in documentation (online or textual) provided with the package. | |
0f113f3e | 21 | * |
d02b48c6 RE |
22 | * Redistribution and use in source and binary forms, with or without |
23 | * modification, are permitted provided that the following conditions | |
24 | * are met: | |
25 | * 1. Redistributions of source code must retain the copyright | |
26 | * notice, this list of conditions and the following disclaimer. | |
27 | * 2. Redistributions in binary form must reproduce the above copyright | |
28 | * notice, this list of conditions and the following disclaimer in the | |
29 | * documentation and/or other materials provided with the distribution. | |
30 | * 3. All advertising materials mentioning features or use of this software | |
31 | * must display the following acknowledgement: | |
32 | * "This product includes cryptographic software written by | |
33 | * Eric Young (eay@cryptsoft.com)" | |
34 | * The word 'cryptographic' can be left out if the rouines from the library | |
35 | * being used are not cryptographic related :-). | |
0f113f3e | 36 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
37 | * the apps directory (application code) you must include an acknowledgement: |
38 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
0f113f3e | 39 | * |
d02b48c6 RE |
40 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
41 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
42 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
43 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
44 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
45 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
46 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
48 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
49 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
50 | * SUCH DAMAGE. | |
0f113f3e | 51 | * |
d02b48c6 RE |
52 | * The licence and distribution terms for any publically available version or |
53 | * derivative of this code cannot be changed. i.e. this code cannot simply be | |
54 | * copied and put under another distribution licence | |
55 | * [including the GNU Public Licence.] | |
56 | */ | |
57 | ||
d02b48c6 | 58 | #include <stdio.h> |
b39fc560 | 59 | #include "internal/cryptlib.h" |
39c4b709 RL |
60 | |
61 | #ifndef OPENSSL_NO_RC4 | |
62 | ||
0f113f3e MC |
63 | # include <openssl/evp.h> |
64 | # include <openssl/objects.h> | |
65 | # include <openssl/rc4.h> | |
dbad1690 | 66 | |
6435f0f6 RL |
67 | # include "internal/evp_int.h" |
68 | ||
dbad1690 | 69 | /* FIXME: surely this is available elsewhere? */ |
0f113f3e | 70 | # define EVP_RC4_KEY_SIZE 16 |
dbad1690 | 71 | |
0f113f3e MC |
72 | typedef struct { |
73 | RC4_KEY ks; /* working key */ | |
74 | } EVP_RC4_KEY; | |
dbad1690 | 75 | |
936166af | 76 | # define data(ctx) ((EVP_RC4_KEY *)EVP_CIPHER_CTX_cipher_data(ctx)) |
d02b48c6 | 77 | |
1921eaad | 78 | static int rc4_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
0f113f3e | 79 | const unsigned char *iv, int enc); |
be06a934 | 80 | static int rc4_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
0f113f3e MC |
81 | const unsigned char *in, size_t inl); |
82 | static const EVP_CIPHER r4_cipher = { | |
83 | NID_rc4, | |
84 | 1, EVP_RC4_KEY_SIZE, 0, | |
85 | EVP_CIPH_VARIABLE_LENGTH, | |
86 | rc4_init_key, | |
87 | rc4_cipher, | |
88 | NULL, | |
89 | sizeof(EVP_RC4_KEY), | |
90 | NULL, | |
91 | NULL, | |
92 | NULL, | |
93 | NULL | |
94 | }; | |
58964a49 | 95 | |
0f113f3e MC |
96 | static const EVP_CIPHER r4_40_cipher = { |
97 | NID_rc4_40, | |
98 | 1, 5 /* 40 bit */ , 0, | |
99 | EVP_CIPH_VARIABLE_LENGTH, | |
100 | rc4_init_key, | |
101 | rc4_cipher, | |
102 | NULL, | |
103 | sizeof(EVP_RC4_KEY), | |
104 | NULL, | |
105 | NULL, | |
106 | NULL, | |
107 | NULL | |
108 | }; | |
d02b48c6 | 109 | |
13588350 | 110 | const EVP_CIPHER *EVP_rc4(void) |
0f113f3e MC |
111 | { |
112 | return (&r4_cipher); | |
113 | } | |
d02b48c6 | 114 | |
13588350 | 115 | const EVP_CIPHER *EVP_rc4_40(void) |
0f113f3e MC |
116 | { |
117 | return (&r4_40_cipher); | |
118 | } | |
58964a49 | 119 | |
1921eaad | 120 | static int rc4_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
0f113f3e MC |
121 | const unsigned char *iv, int enc) |
122 | { | |
123 | RC4_set_key(&data(ctx)->ks, EVP_CIPHER_CTX_key_length(ctx), key); | |
124 | return 1; | |
125 | } | |
d02b48c6 | 126 | |
be06a934 | 127 | static int rc4_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
0f113f3e MC |
128 | const unsigned char *in, size_t inl) |
129 | { | |
130 | RC4(&data(ctx)->ks, inl, in, out); | |
131 | return 1; | |
132 | } | |
d02b48c6 | 133 | #endif |