+++ /dev/null
-/* crypto/evp/e_cbc_r2.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.]
- */
-
-#ifndef NO_RC2
-
-#include <stdio.h>
-#include "cryptlib.h"
-#include <openssl/evp.h>
-#include <openssl/objects.h>
-
-static int rc2_cbc_init_key(EVP_CIPHER_CTX *ctx, unsigned char *key,
- unsigned char *iv,int enc);
-static int rc2_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
- unsigned char *in, unsigned int inl);
-static int rc2_meth_to_magic(const EVP_CIPHER *e);
-static EVP_CIPHER *rc2_magic_to_meth(int i);
-static int rc2_set_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type);
-static int rc2_get_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type);
-
-#define RC2_40_MAGIC 0xa0
-#define RC2_64_MAGIC 0x78
-#define RC2_128_MAGIC 0x3a
-
-static EVP_CIPHER r2_cbc_cipher=
- {
- NID_rc2_cbc,
- 8,EVP_RC2_KEY_SIZE,8,
- EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH,
- rc2_cbc_init_key,
- rc2_cbc_cipher,
- NULL,
- sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+
- sizeof((((EVP_CIPHER_CTX *)NULL)->c.rc2_ks)),
- rc2_set_asn1_type_and_iv,
- rc2_get_asn1_type_and_iv,
- NULL
- };
-
-static EVP_CIPHER r2_64_cbc_cipher=
- {
- NID_rc2_64_cbc,
- 8,8 /* 64 bit */,8,
- EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH,
- rc2_cbc_init_key,
- rc2_cbc_cipher,
- NULL,
- sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+
- sizeof((((EVP_CIPHER_CTX *)NULL)->c.rc2_ks)),
- rc2_set_asn1_type_and_iv,
- rc2_get_asn1_type_and_iv,
- NULL
- };
-
-static EVP_CIPHER r2_40_cbc_cipher=
- {
- NID_rc2_40_cbc,
- 8,5 /* 40 bit */,8,
- EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH,
- rc2_cbc_init_key,
- rc2_cbc_cipher,
- NULL,
- sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+
- sizeof((((EVP_CIPHER_CTX *)NULL)->c.rc2_ks)),
- rc2_set_asn1_type_and_iv,
- rc2_get_asn1_type_and_iv,
- NULL
- };
-
-EVP_CIPHER *EVP_rc2_cbc(void)
- {
- return(&r2_cbc_cipher);
- }
-
-EVP_CIPHER *EVP_rc2_64_cbc(void)
- {
- return(&r2_64_cbc_cipher);
- }
-
-EVP_CIPHER *EVP_rc2_40_cbc(void)
- {
- return(&r2_40_cbc_cipher);
- }
-
-static int rc2_cbc_init_key(EVP_CIPHER_CTX *ctx, unsigned char *key,
- unsigned char *iv, int enc)
- {
- RC2_set_key(&(ctx->c.rc2_ks),EVP_CIPHER_CTX_key_length(ctx),
- key,EVP_CIPHER_key_length(ctx->cipher)*8);
- return 1;
- }
-
-static int rc2_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
- unsigned char *in, unsigned int inl)
- {
- RC2_cbc_encrypt(
- in,out,(long)inl,
- &(ctx->c.rc2_ks),&(ctx->iv[0]),
- ctx->encrypt);
- return 1;
- }
-
-static int rc2_meth_to_magic(const EVP_CIPHER *e)
- {
- int i;
-
- i=EVP_CIPHER_key_length(e);
- if (i == 16) return(RC2_128_MAGIC);
- else if (i == 8) return(RC2_64_MAGIC);
- else if (i == 5) return(RC2_40_MAGIC);
- else return(0);
- }
-
-static EVP_CIPHER *rc2_magic_to_meth(int i)
- {
- if (i == RC2_128_MAGIC) return(EVP_rc2_cbc());
- else if (i == RC2_64_MAGIC) return(EVP_rc2_64_cbc());
- else if (i == RC2_40_MAGIC) return(EVP_rc2_40_cbc());
- else
- {
- EVPerr(EVP_F_RC2_MAGIC_TO_METH,EVP_R_UNSUPPORTED_KEY_SIZE);
- return(NULL);
- }
- }
-
-static int rc2_get_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
- {
- long num=0;
- int i=0,l;
- EVP_CIPHER *e;
-
- if (type != NULL)
- {
- l=EVP_CIPHER_CTX_iv_length(c);
- i=ASN1_TYPE_get_int_octetstring(type,&num,c->oiv,l);
- if (i != l)
- return(-1);
- else if (i > 0)
- memcpy(c->iv,c->oiv,l);
- e=rc2_magic_to_meth((int)num);
- if (e == NULL)
- return(-1);
- if (e != EVP_CIPHER_CTX_cipher(c))
- {
- EVP_CIPHER_CTX_cipher(c)=e;
- EVP_CIPHER_CTX_set_key_length(c, EVP_CIPHER_key_length(c));
- rc2_cbc_init_key(c,NULL,NULL,1);
- }
- }
- return(i);
- }
-
-static int rc2_set_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
- {
- long num;
- int i=0,j;
-
- if (type != NULL)
- {
- num=rc2_meth_to_magic(EVP_CIPHER_CTX_cipher(c));
- j=EVP_CIPHER_CTX_iv_length(c);
- i=ASN1_TYPE_set_int_octetstring(type,num,c->oiv,j);
- }
- return(i);
- }
-
-#endif
projects / openssl.git / blobdiff