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Diffstat (limited to 'openssl/crypto/evp/e_rc4.c')
| -rw-r--r-- | openssl/crypto/evp/e_rc4.c | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/openssl/crypto/evp/e_rc4.c b/openssl/crypto/evp/e_rc4.c new file mode 100644 index 00000000..8b5175e0 --- /dev/null +++ b/openssl/crypto/evp/e_rc4.c @@ -0,0 +1,136 @@ +/* crypto/evp/e_rc4.c */ +/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) + * All rights reserved. + * + * This package is an SSL implementation written + * by Eric Young (eay@cryptsoft.com). + * The implementation was written so as to conform with Netscapes SSL. + * + * This library is free for commercial and non-commercial use as long as + * the following conditions are aheared to. The following conditions + * apply to all code found in this distribution, be it the RC4, RSA, + * lhash, DES, etc., code; not just the SSL code. The SSL documentation + * included with this distribution is covered by the same copyright terms + * except that the holder is Tim Hudson (tjh@cryptsoft.com). + * + * Copyright remains Eric Young's, and as such any Copyright notices in + * the code are not to be removed. + * If this package is used in a product, Eric Young should be given attribution + * as the author of the parts of the library used. + * This can be in the form of a textual message at program startup or + * in documentation (online or textual) provided with the package. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * "This product includes cryptographic software written by + * Eric Young (eay@cryptsoft.com)" + * The word 'cryptographic' can be left out if the rouines from the library + * being used are not cryptographic related :-). + * 4. If you include any Windows specific code (or a derivative thereof) from + * the apps directory (application code) you must include an acknowledgement: + * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" + * + * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * The licence and distribution terms for any publically available version or + * derivative of this code cannot be changed. i.e. this code cannot simply be + * copied and put under another distribution licence + * [including the GNU Public Licence.] + */ + +#include <stdio.h> +#include "cryptlib.h" + +#ifndef OPENSSL_NO_RC4 + +#include <openssl/evp.h> +#include <openssl/objects.h> +#include <openssl/rc4.h> + +/* FIXME: surely this is available elsewhere? */ +#define EVP_RC4_KEY_SIZE 16 + +typedef struct + { + RC4_KEY ks; /* working key */ + } EVP_RC4_KEY; + +#define data(ctx) ((EVP_RC4_KEY *)(ctx)->cipher_data) + +static int rc4_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, + const unsigned char *iv,int enc); +static int rc4_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t inl); +static const EVP_CIPHER r4_cipher= + { + NID_rc4, + 1,EVP_RC4_KEY_SIZE,0, + EVP_CIPH_VARIABLE_LENGTH, + rc4_init_key, + rc4_cipher, + NULL, + sizeof(EVP_RC4_KEY), + NULL, + NULL, + NULL, + NULL + }; + +static const EVP_CIPHER r4_40_cipher= + { + NID_rc4_40, + 1,5 /* 40 bit */,0, + EVP_CIPH_VARIABLE_LENGTH, + rc4_init_key, + rc4_cipher, + NULL, + sizeof(EVP_RC4_KEY), + NULL, + NULL, + NULL, + NULL + }; + +const EVP_CIPHER *EVP_rc4(void) + { + return(&r4_cipher); + } + +const EVP_CIPHER *EVP_rc4_40(void) + { + return(&r4_40_cipher); + } + +static int rc4_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, + const unsigned char *iv, int enc) + { + RC4_set_key(&data(ctx)->ks,EVP_CIPHER_CTX_key_length(ctx), + key); + return 1; + } + +static int rc4_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t inl) + { + RC4(&data(ctx)->ks,inl,in,out); + return 1; + } +#endif |