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86 lines
2.0 KiB
C
86 lines
2.0 KiB
C
/*
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* Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <stdio.h>
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#include "internal/cryptlib.h"
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#ifndef OPENSSL_NO_RC4
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# include <openssl/evp.h>
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# include <openssl/objects.h>
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# include <openssl/rc4.h>
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# include "internal/evp_int.h"
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/* FIXME: surely this is available elsewhere? */
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# define EVP_RC4_KEY_SIZE 16
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typedef struct {
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RC4_KEY ks; /* working key */
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} EVP_RC4_KEY;
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# define data(ctx) ((EVP_RC4_KEY *)EVP_CIPHER_CTX_get_cipher_data(ctx))
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static int rc4_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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const unsigned char *iv, int enc);
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static int rc4_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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const unsigned char *in, size_t inl);
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static const EVP_CIPHER r4_cipher = {
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NID_rc4,
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1, EVP_RC4_KEY_SIZE, 0,
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EVP_CIPH_VARIABLE_LENGTH,
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rc4_init_key,
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rc4_cipher,
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NULL,
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sizeof(EVP_RC4_KEY),
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NULL,
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NULL,
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NULL,
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NULL
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};
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static const EVP_CIPHER r4_40_cipher = {
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NID_rc4_40,
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1, 5 /* 40 bit */ , 0,
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EVP_CIPH_VARIABLE_LENGTH,
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rc4_init_key,
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rc4_cipher,
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NULL,
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sizeof(EVP_RC4_KEY),
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NULL,
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NULL,
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NULL,
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NULL
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};
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const EVP_CIPHER *EVP_rc4(void)
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{
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return (&r4_cipher);
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}
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const EVP_CIPHER *EVP_rc4_40(void)
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{
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return (&r4_40_cipher);
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}
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static int rc4_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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const unsigned char *iv, int enc)
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{
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RC4_set_key(&data(ctx)->ks, EVP_CIPHER_CTX_key_length(ctx), key);
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return 1;
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}
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static int rc4_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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const unsigned char *in, size_t inl)
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{
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RC4(&data(ctx)->ks, inl, in, out);
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return 1;
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}
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#endif
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