1 /*
2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the OpenSSL license (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 #include <stdio.h>
11 #include "internal/cryptlib.h"
12
13 #ifndef OPENSSL_NO_RC4
14
15 # include <openssl/evp.h>
16 # include <openssl/objects.h>
17 # include <openssl/rc4.h>
18
19 # include "crypto/evp.h"
20
21 typedef struct {
22 RC4_KEY ks; /* working key */
23 } EVP_RC4_KEY;
24
25 # define data(ctx) ((EVP_RC4_KEY *)EVP_CIPHER_CTX_get_cipher_data(ctx))
26
27 static int rc4_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
28 const unsigned char *iv, int enc);
29 static int rc4_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
30 const unsigned char *in, size_t inl);
31 static const EVP_CIPHER r4_cipher = {
32 NID_rc4,
33 1, EVP_RC4_KEY_SIZE, 0,
34 EVP_CIPH_VARIABLE_LENGTH,
35 rc4_init_key,
36 rc4_cipher,
37 NULL,
38 sizeof(EVP_RC4_KEY),
39 NULL,
40 NULL,
41 NULL,
42 NULL
43 };
44
45 static const EVP_CIPHER r4_40_cipher = {
46 NID_rc4_40,
47 1, 5 /* 40 bit */ , 0,
48 EVP_CIPH_VARIABLE_LENGTH,
49 rc4_init_key,
50 rc4_cipher,
51 NULL,
52 sizeof(EVP_RC4_KEY),
53 NULL,
54 NULL,
55 NULL,
56 NULL
57 };
58
EVP_rc4(void)59 const EVP_CIPHER *EVP_rc4(void)
60 {
61 return &r4_cipher;
62 }
63
EVP_rc4_40(void)64 const EVP_CIPHER *EVP_rc4_40(void)
65 {
66 return &r4_40_cipher;
67 }
68
rc4_init_key(EVP_CIPHER_CTX * ctx,const unsigned char * key,const unsigned char * iv,int enc)69 static int rc4_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
70 const unsigned char *iv, int enc)
71 {
72 RC4_set_key(&data(ctx)->ks, EVP_CIPHER_CTX_key_length(ctx), key);
73 return 1;
74 }
75
rc4_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t inl)76 static int rc4_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
77 const unsigned char *in, size_t inl)
78 {
79 RC4(&data(ctx)->ks, inl, in, out);
80 return 1;
81 }
82 #endif
83