1 | /* |
2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. |
3 | * |
4 | * Licensed under the Apache License 2.0 (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 | |
59 | const EVP_CIPHER *EVP_rc4(void) |
60 | { |
61 | return &r4_cipher; |
62 | } |
63 | |
64 | const EVP_CIPHER *EVP_rc4_40(void) |
65 | { |
66 | return &r4_40_cipher; |
67 | } |
68 | |
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 | |
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 | |