crypto/evp/e_cbc_r2.c - third_party/openssl - Git at Google

 /* 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 "evp.h"
 #include "objects.h"

 #ifndef NOPROTO
 static void rc2_cbc_init_key(EVP_CIPHER_CTX *ctx, unsigned char *key,
 	unsigned char *iv,int enc);
 static void rc2_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 	unsigned char *in, unsigned int inl);
 static int rc2_meth_to_magic(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);

 #else

 static void rc2_cbc_init_key();
 static void rc2_cbc_cipher();
 static int rc2_meth_to_magic();
 static EVP_CIPHER *rc2_magic_to_meth();
 static int rc2_set_asn1_type_and_iv();
 static int rc2_get_asn1_type_and_iv();
 #endif

 #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,
 	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,
 	};

 static EVP_CIPHER r2_64_cbc_cipher=
 	{
 	NID_rc2_40_cbc,
 	8,8 /* 64 bit */,8,
 	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,
 	};

 static EVP_CIPHER r2_40_cbc_cipher=
 	{
 	NID_rc2_40_cbc,
 	8,5 /* 40 bit */,8,
 	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,
 	};

 EVP_CIPHER *EVP_rc2_cbc()
 	{
 	return(&r2_cbc_cipher);
 	}

 EVP_CIPHER *EVP_rc2_64_cbc()
 	{
 	return(&r2_64_cbc_cipher);
 	}

 EVP_CIPHER *EVP_rc2_40_cbc()
 	{
 	return(&r2_40_cbc_cipher);
 	}

 static void rc2_cbc_init_key(ctx,key,iv,enc)
 EVP_CIPHER_CTX *ctx;
 unsigned char *key;
 unsigned char *iv;
 int enc;
 	{
 	if (iv != NULL)
 		memcpy(&(ctx->oiv[0]),iv,8);
 	memcpy(&(ctx->iv[0]),&(ctx->oiv[0]),8);
 	if (key != NULL)
 		RC2_set_key(&(ctx->c.rc2_ks),EVP_CIPHER_CTX_key_length(ctx),
 			key,EVP_CIPHER_CTX_key_length(ctx)*8);
 	}

 static void rc2_cbc_cipher(ctx,out,in,inl)
 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);
 	}

 static int rc2_meth_to_magic(e)
 EVP_CIPHER *e;
 	{
 	int i;

 	i=EVP_CIPHER_key_length(e);
 	if 	(i == 128) return(RC2_128_MAGIC);
 	else if (i == 64)  return(RC2_64_MAGIC);
 	else if (i == 40)  return(RC2_40_MAGIC);
 	else return(0);
 	}

 static EVP_CIPHER *rc2_magic_to_meth(i)
 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(c,type)
 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;
 			rc2_cbc_init_key(c,NULL,NULL,1);
 			}
 		}
 	return(i);
 	}

 static int rc2_set_asn1_type_and_iv(c,type)
 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
	/* 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 "evp.h"
	#include "objects.h"

	#ifndef NOPROTO
	static void rc2_cbc_init_key(EVP_CIPHER_CTX ctx, unsigned char key,
	unsigned char *iv,int enc);
	static void rc2_cbc_cipher(EVP_CIPHER_CTX ctx, unsigned char out,
	unsigned char *in, unsigned int inl);
	static int rc2_meth_to_magic(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);

	#else

	static void rc2_cbc_init_key();
	static void rc2_cbc_cipher();
	static int rc2_meth_to_magic();
	static EVP_CIPHER *rc2_magic_to_meth();
	static int rc2_set_asn1_type_and_iv();
	static int rc2_get_asn1_type_and_iv();
	#endif

	#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,
	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,
	};

	static EVP_CIPHER r2_64_cbc_cipher=
	{
	NID_rc2_40_cbc,
	8,8 /* 64 bit */,8,
	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,
	};

	static EVP_CIPHER r2_40_cbc_cipher=
	{
	NID_rc2_40_cbc,
	8,5 /* 40 bit */,8,
	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,
	};

	EVP_CIPHER *EVP_rc2_cbc()
	{
	return(&r2_cbc_cipher);
	}

	EVP_CIPHER *EVP_rc2_64_cbc()
	{
	return(&r2_64_cbc_cipher);
	}

	EVP_CIPHER *EVP_rc2_40_cbc()
	{
	return(&r2_40_cbc_cipher);
	}

	static void rc2_cbc_init_key(ctx,key,iv,enc)
	EVP_CIPHER_CTX *ctx;
	unsigned char *key;
	unsigned char *iv;
	int enc;
	{
	if (iv != NULL)
	memcpy(&(ctx->oiv[0]),iv,8);
	memcpy(&(ctx->iv[0]),&(ctx->oiv[0]),8);
	if (key != NULL)
	RC2_set_key(&(ctx->c.rc2_ks),EVP_CIPHER_CTX_key_length(ctx),
	key,EVP_CIPHER_CTX_key_length(ctx)*8);
	}

	static void rc2_cbc_cipher(ctx,out,in,inl)
	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);
	}

	static int rc2_meth_to_magic(e)
	EVP_CIPHER *e;
	{
	int i;

	i=EVP_CIPHER_key_length(e);
	if (i == 128) return(RC2_128_MAGIC);
	else if (i == 64) return(RC2_64_MAGIC);
	else if (i == 40) return(RC2_40_MAGIC);
	else return(0);
	}

	static EVP_CIPHER *rc2_magic_to_meth(i)
	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(c,type)
	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;
	rc2_cbc_init_key(c,NULL,NULL,1);
	}
	}
	return(i);
	}

	static int rc2_set_asn1_type_and_iv(c,type)
	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