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1 /* crypto/evp/e_rc4.c */ | |
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) | |
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 | |
59 #include <stdio.h> | |
60 #include "cryptlib.h" | |
61 | |
62 #ifndef OPENSSL_NO_RC4 | |
63 | |
64 #include <openssl/evp.h> | |
65 #include "evp_locl.h" | |
66 #include <openssl/objects.h> | |
67 #include <openssl/rc4.h> | |
68 | |
69 /* FIXME: surely this is available elsewhere? */ | |
70 #define EVP_RC4_KEY_SIZE 16 | |
71 | |
72 typedef struct | |
73 { | |
74 RC4_KEY ks; /* working key */ | |
75 } EVP_RC4_KEY; | |
76 | |
77 #define data(ctx) ((EVP_RC4_KEY *)(ctx)->cipher_data) | |
78 | |
79 static int rc4_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, | |
80 const unsigned char *iv,int enc); | |
81 static int rc4_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, | |
82 const unsigned char *in, size_t inl); | |
83 static const EVP_CIPHER r4_cipher= | |
84 { | |
85 NID_rc4, | |
86 1,EVP_RC4_KEY_SIZE,0, | |
87 EVP_CIPH_VARIABLE_LENGTH, | |
88 rc4_init_key, | |
89 rc4_cipher, | |
90 NULL, | |
91 sizeof(EVP_RC4_KEY), | |
92 NULL, | |
93 NULL, | |
94 NULL, | |
95 NULL | |
96 }; | |
97 | |
98 static const EVP_CIPHER r4_40_cipher= | |
99 { | |
100 NID_rc4_40, | |
101 1,5 /* 40 bit */,0, | |
102 EVP_CIPH_VARIABLE_LENGTH, | |
103 rc4_init_key, | |
104 rc4_cipher, | |
105 NULL, | |
106 sizeof(EVP_RC4_KEY), | |
107 NULL, | |
108 NULL, | |
109 NULL, | |
110 NULL | |
111 }; | |
112 | |
113 const EVP_CIPHER *EVP_rc4(void) | |
114 { | |
115 return(&r4_cipher); | |
116 } | |
117 | |
118 const EVP_CIPHER *EVP_rc4_40(void) | |
119 { | |
120 return(&r4_40_cipher); | |
121 } | |
122 | |
123 static int rc4_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, | |
124 const unsigned char *iv, int enc) | |
125 { | |
126 RC4_set_key(&data(ctx)->ks,EVP_CIPHER_CTX_key_length(ctx), | |
127 key); | |
128 return 1; | |
129 } | |
130 | |
131 static int rc4_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, | |
132 const unsigned char *in, size_t inl) | |
133 { | |
134 RC4(&data(ctx)->ks,inl,in,out); | |
135 return 1; | |
136 } | |
137 #endif | |
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