sl@0: /* crypto/evp/e_des3.c */
sl@0: /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
sl@0:  * All rights reserved.
sl@0:  *
sl@0:  * This package is an SSL implementation written
sl@0:  * by Eric Young (eay@cryptsoft.com).
sl@0:  * The implementation was written so as to conform with Netscapes SSL.
sl@0:  * 
sl@0:  * This library is free for commercial and non-commercial use as long as
sl@0:  * the following conditions are aheared to.  The following conditions
sl@0:  * apply to all code found in this distribution, be it the RC4, RSA,
sl@0:  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
sl@0:  * included with this distribution is covered by the same copyright terms
sl@0:  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
sl@0:  * 
sl@0:  * Copyright remains Eric Young's, and as such any Copyright notices in
sl@0:  * the code are not to be removed.
sl@0:  * If this package is used in a product, Eric Young should be given attribution
sl@0:  * as the author of the parts of the library used.
sl@0:  * This can be in the form of a textual message at program startup or
sl@0:  * in documentation (online or textual) provided with the package.
sl@0:  * 
sl@0:  * Redistribution and use in source and binary forms, with or without
sl@0:  * modification, are permitted provided that the following conditions
sl@0:  * are met:
sl@0:  * 1. Redistributions of source code must retain the copyright
sl@0:  *    notice, this list of conditions and the following disclaimer.
sl@0:  * 2. Redistributions in binary form must reproduce the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer in the
sl@0:  *    documentation and/or other materials provided with the distribution.
sl@0:  * 3. All advertising materials mentioning features or use of this software
sl@0:  *    must display the following acknowledgement:
sl@0:  *    "This product includes cryptographic software written by
sl@0:  *     Eric Young (eay@cryptsoft.com)"
sl@0:  *    The word 'cryptographic' can be left out if the rouines from the library
sl@0:  *    being used are not cryptographic related :-).
sl@0:  * 4. If you include any Windows specific code (or a derivative thereof) from 
sl@0:  *    the apps directory (application code) you must include an acknowledgement:
sl@0:  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
sl@0:  * 
sl@0:  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
sl@0:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
sl@0:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
sl@0:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
sl@0:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
sl@0:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
sl@0:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
sl@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
sl@0:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
sl@0:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
sl@0:  * SUCH DAMAGE.
sl@0:  * 
sl@0:  * The licence and distribution terms for any publically available version or
sl@0:  * derivative of this code cannot be changed.  i.e. this code cannot simply be
sl@0:  * copied and put under another distribution licence
sl@0:  * [including the GNU Public Licence.]
sl@0:  */
sl@0: 
sl@0: #include <stdio.h>
sl@0: #include "cryptlib.h"
sl@0: #ifndef OPENSSL_NO_DES
sl@0: #include <openssl/evp.h>
sl@0: #include <openssl/objects.h>
sl@0: #include "evp_locl.h"
sl@0: #include <openssl/des.h>
sl@0: #include <openssl/rand.h>
sl@0: 
sl@0: static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
sl@0: 			    const unsigned char *iv,int enc);
sl@0: 
sl@0: static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
sl@0: 			     const unsigned char *iv,int enc);
sl@0: 
sl@0: static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);
sl@0: 
sl@0: typedef struct
sl@0:     {
sl@0:     DES_key_schedule ks1;/* key schedule */
sl@0:     DES_key_schedule ks2;/* key schedule (for ede) */
sl@0:     DES_key_schedule ks3;/* key schedule (for ede3) */
sl@0:     } DES_EDE_KEY;
sl@0: 
sl@0: #define data(ctx) ((DES_EDE_KEY *)(ctx)->cipher_data)
sl@0: 
sl@0: /* Because of various casts and different args can't use IMPLEMENT_BLOCK_CIPHER */
sl@0: 
sl@0: static int des_ede_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
sl@0: 			      const unsigned char *in, unsigned int inl)
sl@0: {
sl@0: 	BLOCK_CIPHER_ecb_loop()
sl@0: 		DES_ecb3_encrypt((const_DES_cblock *)(in + i),
sl@0: 				 (DES_cblock *)(out + i),
sl@0: 				 &data(ctx)->ks1, &data(ctx)->ks2,
sl@0: 				 &data(ctx)->ks3,
sl@0: 				 ctx->encrypt);
sl@0: 	return 1;
sl@0: }
sl@0: 
sl@0: static int des_ede_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
sl@0: 			      const unsigned char *in, unsigned int inl)
sl@0: {
sl@0: 	DES_ede3_ofb64_encrypt(in, out, (long)inl,
sl@0: 			       &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
sl@0: 			       (DES_cblock *)ctx->iv, &ctx->num);
sl@0: 	return 1;
sl@0: }
sl@0: 
sl@0: static int des_ede_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
sl@0: 			      const unsigned char *in, unsigned int inl)
sl@0: {
sl@0: #ifdef KSSL_DEBUG
sl@0: 	{
sl@0:         int i;
sl@0:         char *cp;
sl@0: 	printf("des_ede_cbc_cipher(ctx=%lx, buflen=%d)\n", ctx, ctx->buf_len);
sl@0: 	printf("\t iv= ");
sl@0:         for(i=0;i<8;i++)
sl@0:                 printf("%02X",ctx->iv[i]);
sl@0: 	printf("\n");
sl@0: 	}
sl@0: #endif    /* KSSL_DEBUG */
sl@0: 	DES_ede3_cbc_encrypt(in, out, (long)inl,
sl@0: 			     &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
sl@0: 			     (DES_cblock *)ctx->iv, ctx->encrypt);
sl@0: 	return 1;
sl@0: }
sl@0: 
sl@0: static int des_ede_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
sl@0: 			      const unsigned char *in, unsigned int inl)
sl@0: {
sl@0: 	DES_ede3_cfb64_encrypt(in, out, (long)inl, 
sl@0: 			       &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
sl@0: 			       (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
sl@0: 	return 1;
sl@0: }
sl@0: 
sl@0: /* Although we have a CFB-r implementation for 3-DES, it doesn't pack the right
sl@0:    way, so wrap it here */
sl@0: static int des_ede3_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
sl@0: 				const unsigned char *in, unsigned int inl)
sl@0:     {
sl@0:     unsigned int n;
sl@0:     unsigned char c[1],d[1];
sl@0: 
sl@0:     for(n=0 ; n < inl ; ++n)
sl@0: 	{
sl@0: 	c[0]=(in[n/8]&(1 << (7-n%8))) ? 0x80 : 0;
sl@0: 	DES_ede3_cfb_encrypt(c,d,1,1,
sl@0: 			     &data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3,
sl@0: 			     (DES_cblock *)ctx->iv,ctx->encrypt);
sl@0: 	out[n/8]=(out[n/8]&~(0x80 >> (n%8)))|((d[0]&0x80) >> (n%8));
sl@0: 	}
sl@0: 
sl@0:     return 1;
sl@0:     }
sl@0: 
sl@0: static int des_ede3_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
sl@0: 				const unsigned char *in, unsigned int inl)
sl@0:     {
sl@0:     DES_ede3_cfb_encrypt(in,out,8,inl,
sl@0: 			 &data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3,
sl@0: 			 (DES_cblock *)ctx->iv,ctx->encrypt);
sl@0:     return 1;
sl@0:     }
sl@0: 
sl@0: BLOCK_CIPHER_defs(des_ede, DES_EDE_KEY, NID_des_ede, 8, 16, 8, 64,
sl@0: 			EVP_CIPH_RAND_KEY, des_ede_init_key, NULL, 
sl@0: 			EVP_CIPHER_set_asn1_iv,
sl@0: 			EVP_CIPHER_get_asn1_iv,
sl@0: 			des3_ctrl)
sl@0: 
sl@0: #define des_ede3_cfb64_cipher des_ede_cfb64_cipher
sl@0: #define des_ede3_ofb_cipher des_ede_ofb_cipher
sl@0: #define des_ede3_cbc_cipher des_ede_cbc_cipher
sl@0: #define des_ede3_ecb_cipher des_ede_ecb_cipher
sl@0: 
sl@0: BLOCK_CIPHER_defs(des_ede3, DES_EDE_KEY, NID_des_ede3, 8, 24, 8, 64,
sl@0: 			EVP_CIPH_RAND_KEY, des_ede3_init_key, NULL, 
sl@0: 			EVP_CIPHER_set_asn1_iv,
sl@0: 			EVP_CIPHER_get_asn1_iv,
sl@0: 			des3_ctrl)
sl@0: 
sl@0: BLOCK_CIPHER_def_cfb(des_ede3,DES_EDE_KEY,NID_des_ede3,24,8,1,
sl@0: 		     EVP_CIPH_RAND_KEY, des_ede3_init_key,NULL,
sl@0: 		     EVP_CIPHER_set_asn1_iv,
sl@0: 		     EVP_CIPHER_get_asn1_iv,
sl@0: 		     des3_ctrl)
sl@0: 
sl@0: BLOCK_CIPHER_def_cfb(des_ede3,DES_EDE_KEY,NID_des_ede3,24,8,8,
sl@0: 		     EVP_CIPH_RAND_KEY, des_ede3_init_key,NULL,
sl@0: 		     EVP_CIPHER_set_asn1_iv,
sl@0: 		     EVP_CIPHER_get_asn1_iv,
sl@0: 		     des3_ctrl)
sl@0: 
sl@0: static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
sl@0: 			    const unsigned char *iv, int enc)
sl@0: 	{
sl@0: 	DES_cblock *deskey = (DES_cblock *)key;
sl@0: #ifdef EVP_CHECK_DES_KEY
sl@0: 	if (DES_set_key_checked(&deskey[0],&data(ctx)->ks1)
sl@0: 		!! DES_set_key_checked(&deskey[1],&data(ctx)->ks2))
sl@0: 		return 0;
sl@0: #else
sl@0: 	DES_set_key_unchecked(&deskey[0],&data(ctx)->ks1);
sl@0: 	DES_set_key_unchecked(&deskey[1],&data(ctx)->ks2);
sl@0: #endif
sl@0: 	memcpy(&data(ctx)->ks3,&data(ctx)->ks1,
sl@0: 	       sizeof(data(ctx)->ks1));
sl@0: 	return 1;
sl@0: 	}
sl@0: 
sl@0: static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
sl@0: 			     const unsigned char *iv, int enc)
sl@0: 	{
sl@0: 	DES_cblock *deskey = (DES_cblock *)key;
sl@0: #ifdef KSSL_DEBUG
sl@0: 	{
sl@0:         int i;
sl@0:         printf("des_ede3_init_key(ctx=%lx)\n", ctx);
sl@0: 	printf("\tKEY= ");
sl@0:         for(i=0;i<24;i++) printf("%02X",key[i]); printf("\n");
sl@0: 	printf("\t IV= ");
sl@0:         for(i=0;i<8;i++) printf("%02X",iv[i]); printf("\n");
sl@0: 	}
sl@0: #endif	/* KSSL_DEBUG */
sl@0: 
sl@0: #ifdef EVP_CHECK_DES_KEY
sl@0: 	if (DES_set_key_checked(&deskey[0],&data(ctx)->ks1)
sl@0: 		|| DES_set_key_checked(&deskey[1],&data(ctx)->ks2)
sl@0: 		|| DES_set_key_checked(&deskey[2],&data(ctx)->ks3))
sl@0: 		return 0;
sl@0: #else
sl@0: 	DES_set_key_unchecked(&deskey[0],&data(ctx)->ks1);
sl@0: 	DES_set_key_unchecked(&deskey[1],&data(ctx)->ks2);
sl@0: 	DES_set_key_unchecked(&deskey[2],&data(ctx)->ks3);
sl@0: #endif
sl@0: 	return 1;
sl@0: 	}
sl@0: 
sl@0: static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
sl@0: 	{
sl@0: 
sl@0: 	DES_cblock *deskey = ptr;
sl@0: 
sl@0: 	switch(type)
sl@0: 		{
sl@0: 	case EVP_CTRL_RAND_KEY:
sl@0: 		if (RAND_bytes(ptr, c->key_len) <= 0)
sl@0: 			return 0;
sl@0: 		DES_set_odd_parity(deskey);
sl@0: 		if (c->key_len >= 16)
sl@0: 			DES_set_odd_parity(deskey + 1);
sl@0: 		if (c->key_len >= 24)
sl@0: 			DES_set_odd_parity(deskey + 2);
sl@0: 		return 1;
sl@0: 
sl@0: 	default:
sl@0: 		return -1;
sl@0: 		}
sl@0: 	}
sl@0: 
sl@0: EXPORT_C const EVP_CIPHER *EVP_des_ede(void)
sl@0: {
sl@0: 	return &des_ede_ecb;
sl@0: }
sl@0: 
sl@0: EXPORT_C const EVP_CIPHER *EVP_des_ede3(void)
sl@0: {
sl@0: 	return &des_ede3_ecb;
sl@0: }
sl@0: #endif