/src/openssl30/crypto/evp/e_rc4.c
Line | Count | Source |
1 | | /* |
2 | | * Copyright 1995-2021 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 | | /* |
11 | | * RC4 low level APIs are deprecated for public use, but still ok for internal |
12 | | * use. |
13 | | */ |
14 | | #include "internal/deprecated.h" |
15 | | |
16 | | #include <stdio.h> |
17 | | #include "internal/cryptlib.h" |
18 | | |
19 | | #ifndef OPENSSL_NO_RC4 |
20 | | |
21 | | # include <openssl/evp.h> |
22 | | # include <openssl/objects.h> |
23 | | # include <openssl/rc4.h> |
24 | | |
25 | | # include "crypto/evp.h" |
26 | | |
27 | | typedef struct { |
28 | | RC4_KEY ks; /* working key */ |
29 | | } EVP_RC4_KEY; |
30 | | |
31 | 55 | # define data(ctx) ((EVP_RC4_KEY *)EVP_CIPHER_CTX_get_cipher_data(ctx)) |
32 | | |
33 | | static int rc4_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
34 | | const unsigned char *iv, int enc); |
35 | | static int rc4_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
36 | | const unsigned char *in, size_t inl); |
37 | | static const EVP_CIPHER r4_cipher = { |
38 | | NID_rc4, |
39 | | 1, EVP_RC4_KEY_SIZE, 0, |
40 | | EVP_CIPH_VARIABLE_LENGTH, |
41 | | EVP_ORIG_GLOBAL, |
42 | | rc4_init_key, |
43 | | rc4_cipher, |
44 | | NULL, |
45 | | sizeof(EVP_RC4_KEY), |
46 | | NULL, |
47 | | NULL, |
48 | | NULL, |
49 | | NULL |
50 | | }; |
51 | | |
52 | | static const EVP_CIPHER r4_40_cipher = { |
53 | | NID_rc4_40, |
54 | | 1, 5 /* 40 bit */ , 0, |
55 | | EVP_CIPH_VARIABLE_LENGTH, |
56 | | EVP_ORIG_GLOBAL, |
57 | | rc4_init_key, |
58 | | rc4_cipher, |
59 | | NULL, |
60 | | sizeof(EVP_RC4_KEY), |
61 | | NULL, |
62 | | NULL, |
63 | | NULL, |
64 | | NULL |
65 | | }; |
66 | | |
67 | | const EVP_CIPHER *EVP_rc4(void) |
68 | 37 | { |
69 | 37 | return &r4_cipher; |
70 | 37 | } |
71 | | |
72 | | const EVP_CIPHER *EVP_rc4_40(void) |
73 | 31 | { |
74 | 31 | return &r4_40_cipher; |
75 | 31 | } |
76 | | |
77 | | static int rc4_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
78 | | const unsigned char *iv, int enc) |
79 | | { |
80 | | int keylen; |
81 | | |
82 | | if ((keylen = EVP_CIPHER_CTX_get_key_length(ctx)) <= 0) |
83 | | return 0; |
84 | | RC4_set_key(&data(ctx)->ks, keylen, key); |
85 | | return 1; |
86 | | } |
87 | | |
88 | | static int rc4_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
89 | | const unsigned char *in, size_t inl) |
90 | 55 | { |
91 | 55 | RC4(&data(ctx)->ks, inl, in, out); |
92 | 55 | return 1; |
93 | 55 | } |
94 | | #endif |