2 * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
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
11 * RC4 low level APIs are deprecated for public use, but still ok for internal
14 #include "internal/deprecated.h"
17 #include "internal/cryptlib.h"
19 #ifndef OPENSSL_NO_RC4
21 # include <openssl/evp.h>
22 # include <openssl/objects.h>
23 # include <openssl/rc4.h>
25 # include "crypto/evp.h"
28 RC4_KEY ks; /* working key */
31 # define data(ctx) ((EVP_RC4_KEY *)EVP_CIPHER_CTX_get_cipher_data(ctx))
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 = {
39 1, EVP_RC4_KEY_SIZE, 0,
40 EVP_CIPH_VARIABLE_LENGTH,
51 static const EVP_CIPHER r4_40_cipher = {
53 1, 5 /* 40 bit */ , 0,
54 EVP_CIPH_VARIABLE_LENGTH,
65 const EVP_CIPHER *EVP_rc4(void)
70 const EVP_CIPHER *EVP_rc4_40(void)
75 static int rc4_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
76 const unsigned char *iv, int enc)
78 RC4_set_key(&data(ctx)->ks, EVP_CIPHER_CTX_key_length(ctx), key);
82 static int rc4_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
83 const unsigned char *in, size_t inl)
85 RC4(&data(ctx)->ks, inl, in, out);