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Diffstat (limited to 'openssl/crypto/evp/e_rc5.c')
| -rw-r--r-- | openssl/crypto/evp/e_rc5.c | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/openssl/crypto/evp/e_rc5.c b/openssl/crypto/evp/e_rc5.c new file mode 100644 index 0000000..19a10c6 --- /dev/null +++ b/openssl/crypto/evp/e_rc5.c @@ -0,0 +1,126 @@ +/* crypto/evp/e_rc5.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_RC5 + +#include <openssl/evp.h> +#include <openssl/objects.h> +#include "evp_locl.h" +#include <openssl/rc5.h> + +static int r_32_12_16_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, + const unsigned char *iv,int enc); +static int rc5_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr); + +typedef struct + { + int rounds; /* number of rounds */ + RC5_32_KEY ks; /* key schedule */ + } EVP_RC5_KEY; + +#define data(ctx) EVP_C_DATA(EVP_RC5_KEY,ctx) + +IMPLEMENT_BLOCK_CIPHER(rc5_32_12_16, ks, RC5_32, EVP_RC5_KEY, NID_rc5, + 8, RC5_32_KEY_LENGTH, 8, 64, + EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT, + r_32_12_16_init_key, NULL, + NULL, NULL, rc5_ctrl) + +static int rc5_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) + { + switch(type) + { + case EVP_CTRL_INIT: + data(c)->rounds = RC5_12_ROUNDS; + return 1; + + case EVP_CTRL_GET_RC5_ROUNDS: + *(int *)ptr = data(c)->rounds; + return 1; + + case EVP_CTRL_SET_RC5_ROUNDS: + switch(arg) + { + case RC5_8_ROUNDS: + case RC5_12_ROUNDS: + case RC5_16_ROUNDS: + data(c)->rounds = arg; + return 1; + + default: + EVPerr(EVP_F_RC5_CTRL, EVP_R_UNSUPORTED_NUMBER_OF_ROUNDS); + return 0; + } + + default: + return -1; + } + } + +static int r_32_12_16_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, + const unsigned char *iv, int enc) + { + RC5_32_set_key(&data(ctx)->ks,EVP_CIPHER_CTX_key_length(ctx), + key,data(ctx)->rounds); + return 1; + } + +#endif |