/* Written by Ben Laurie, 2001 */

 /*

  * Copyright (c) 2001 The OpenSSL Project.  All rights reserved.

  *

  * 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 above 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 acknowledgment:

  *    "This product includes software developed by the OpenSSL Project

  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"

  *

  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to

  *    endorse or promote products derived from this software without

  *    prior written permission. For written permission, please contact

  *    openssl-core@openssl.org.

  *

  * 5. Products derived from this software may not be called "OpenSSL"

  *    nor may "OpenSSL" appear in their names without prior written

  *    permission of the OpenSSL Project.

  *

  * 6. Redistributions of any form whatsoever must retain the following

  *    acknowledgment:

  *    "This product includes software developed by the OpenSSL Project

  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"

  *

  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY

  * EXPRESSED 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 OpenSSL PROJECT OR

  * ITS 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.

  */

 #include <openssl/evp.h>

 #include <openssl/objects.h>

 #include <openssl/rsa.h>

 #include "evp_locl.h"

 /* This stuff should now all be supported through

  * crypto/engine/hw_openbsd_dev_crypto.c unless I botched it up */

 static void *dummy=&dummy;

 #if 0

 /* check flag after OpenSSL headers to ensure make depend works */

 #ifdef OPENSSL_OPENBSD_DEV_CRYPTO

 #include <fcntl.h>

 #include <stdio.h>

 #include <errno.h>

 #include <sys/ioctl.h>

 #include <crypto/cryptodev.h>

 #include <unistd.h>

 #include <assert.h>

 /* longest key supported in hardware */

 #define MAX_HW_KEY	24

 #define MAX_HW_IV	8

 #define MD5_DIGEST_LENGTH	16

 #define MD5_CBLOCK		64

 static int fd;

 static int dev_failed;

 typedef struct session_op session_op;

 #define CDATA(ctx) EVP_C_DATA(session_op,ctx)

 static void err(const char *str)

     {

     fprintf(stderr,"%s: errno %d\n",str,errno);

     }

 static int dev_crypto_init(session_op *ses)

     {

     if(dev_failed)

 	return 0;

     if(!fd)

 	{

 	int cryptodev_fd;

         if ((cryptodev_fd=open("/dev/crypto",O_RDWR,0)) < 0)

 	    {

 	    err("/dev/crypto");

 	    dev_failed=1;

 	    return 0;

 	    }

         if (ioctl(cryptodev_fd,CRIOGET,&fd) == -1)

 	    {

 	    err("CRIOGET failed");

 	    close(cryptodev_fd);

 	    dev_failed=1;

 	    return 0;

 	    }

 	close(cryptodev_fd);

 	}

     assert(ses);

     memset(ses,'\0',sizeof *ses);

     return 1;

     }

 static int dev_crypto_cleanup(EVP_CIPHER_CTX *ctx)

     {

     if(ioctl(fd,CIOCFSESSION,&CDATA(ctx)->ses) == -1)

 	err("CIOCFSESSION failed");

     OPENSSL_free(CDATA(ctx)->key);

     return 1;

     }

 static int dev_crypto_init_key(EVP_CIPHER_CTX *ctx,int cipher,

 			       const unsigned char *key,int klen)

     {

     if(!dev_crypto_init(CDATA(ctx)))

 	return 0;

     CDATA(ctx)->key=OPENSSL_malloc(MAX_HW_KEY);

     assert(ctx->cipher->iv_len <= MAX_HW_IV);

     memcpy(CDATA(ctx)->key,key,klen);

     CDATA(ctx)->cipher=cipher;

     CDATA(ctx)->keylen=klen;

     if (ioctl(fd,CIOCGSESSION,CDATA(ctx)) == -1)

 	{

 	err("CIOCGSESSION failed");

 	return 0;

 	}

     return 1;

     }

 static int dev_crypto_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,

 			     const unsigned char *in,unsigned int inl)

     {

     struct crypt_op cryp;

     unsigned char lb[MAX_HW_IV];

     if(!inl)

 	return 1;

     assert(CDATA(ctx));

     assert(!dev_failed);

     memset(&cryp,'\0',sizeof cryp);

     cryp.ses=CDATA(ctx)->ses;

     cryp.op=ctx->encrypt ? COP_ENCRYPT : COP_DECRYPT;

     cryp.flags=0;

     cryp.len=inl;

     assert((inl&(ctx->cipher->block_size-1)) == 0);

     cryp.src=(caddr_t)in;

     cryp.dst=(caddr_t)out;

     cryp.mac=0;

     if(ctx->cipher->iv_len)

 	cryp.iv=(caddr_t)ctx->iv;

     if(!ctx->encrypt)

 	memcpy(lb,&in[cryp.len-ctx->cipher->iv_len],ctx->cipher->iv_len);

     if(ioctl(fd, CIOCCRYPT, &cryp) == -1)

 	{

 	if(errno == EINVAL) /* buffers are misaligned */

 	    {

 	    unsigned int cinl=0;

 	    char *cin=NULL;

 	    char *cout=NULL;

 	    /* NB: this can only make cinl != inl with stream ciphers */

 	    cinl=(inl+3)/4*4;

 	    if(((unsigned long)in&3) || cinl != inl)

 		{

 		cin=OPENSSL_malloc(cinl);

 		memcpy(cin,in,inl);

 		cryp.src=cin;

 		}

 	    if(((unsigned long)out&3) || cinl != inl)

 		{

 		cout=OPENSSL_malloc(cinl);

 		cryp.dst=cout;

 		}

 	    cryp.len=cinl;

 	    if(ioctl(fd, CIOCCRYPT, &cryp) == -1)

 		{

 		err("CIOCCRYPT(2) failed");

 		printf("src=%p dst=%p\n",cryp.src,cryp.dst);

 		abort();

 		return 0;

 		}

 	    if(cout)

 		{

 		memcpy(out,cout,inl);

 		OPENSSL_free(cout);

 		}

 	    if(cin)

 		OPENSSL_free(cin);

 	    }

 	else 

 	    {	    

 	    err("CIOCCRYPT failed");

 	    abort();

 	    return 0;

 	    }

 	}

     if(ctx->encrypt)

 	memcpy(ctx->iv,&out[cryp.len-ctx->cipher->iv_len],ctx->cipher->iv_len);

     else

 	memcpy(ctx->iv,lb,ctx->cipher->iv_len);

     return 1;

     }

 static int dev_crypto_des_ede3_init_key(EVP_CIPHER_CTX *ctx,

 					const unsigned char *key,

 					const unsigned char *iv, int enc)

     { return dev_crypto_init_key(ctx,CRYPTO_3DES_CBC,key,24); }

 #define dev_crypto_des_ede3_cbc_cipher dev_crypto_cipher

 BLOCK_CIPHER_def_cbc(dev_crypto_des_ede3, session_op, NID_des_ede3, 8, 24, 8,

 		     0, dev_crypto_des_ede3_init_key,

 		     dev_crypto_cleanup, 

 		     EVP_CIPHER_set_asn1_iv,

 		     EVP_CIPHER_get_asn1_iv,

 		     NULL)

 static int dev_crypto_rc4_init_key(EVP_CIPHER_CTX *ctx,

 					const unsigned char *key,

 					const unsigned char *iv, int enc)

     { return dev_crypto_init_key(ctx,CRYPTO_ARC4,key,16); }

 static const EVP_CIPHER r4_cipher=

     {

     NID_rc4,

     1,16,0,	/* FIXME: key should be up to 256 bytes */

     EVP_CIPH_VARIABLE_LENGTH,

     dev_crypto_rc4_init_key,

     dev_crypto_cipher,

     dev_crypto_cleanup,

     sizeof(session_op),

     NULL,

     NULL,

     NULL

     };

 const EVP_CIPHER *EVP_dev_crypto_rc4(void)

     { return &r4_cipher; }

 typedef struct

     {

     session_op sess;

     char *data;

     int len;

     unsigned char md[EVP_MAX_MD_SIZE];

     } MD_DATA;

 static int dev_crypto_init_digest(MD_DATA *md_data,int mac)

     {

     if(!dev_crypto_init(&md_data->sess))

 	return 0;

     md_data->len=0;

     md_data->data=NULL;

     md_data->sess.mac=mac;

     if (ioctl(fd,CIOCGSESSION,&md_data->sess) == -1)

 	{

 	err("CIOCGSESSION failed");

 	return 0;

 	}

     return 1;

     }

 static int dev_crypto_cleanup_digest(MD_DATA *md_data)

     {

     if (ioctl(fd,CIOCFSESSION,&md_data->sess.ses) == -1)

 	{

 	err("CIOCFSESSION failed");

 	return 0;

 	}

     return 1;

     }

 /* FIXME: if device can do chained MACs, then don't accumulate */

 /* FIXME: move accumulation to the framework */

 static int dev_crypto_md5_init(EVP_MD_CTX *ctx)

     { return dev_crypto_init_digest(ctx->md_data,CRYPTO_MD5); }

 static int do_digest(int ses,unsigned char *md,const void *data,int len)

     {

     struct crypt_op cryp;

     static unsigned char md5zero[16]=

 	{

 	0xd4,0x1d,0x8c,0xd9,0x8f,0x00,0xb2,0x04,

 	0xe9,0x80,0x09,0x98,0xec,0xf8,0x42,0x7e

 	};

     /* some cards can't do zero length */

     if(!len)

 	{

 	memcpy(md,md5zero,16);

 	return 1;

 	}

     memset(&cryp,'\0',sizeof cryp);

     cryp.ses=ses;

     cryp.op=COP_ENCRYPT;/* required to do the MAC rather than check it */

     cryp.len=len;

     cryp.src=(caddr_t)data;

     cryp.dst=(caddr_t)data; // FIXME!!!

     cryp.mac=(caddr_t)md;

     if(ioctl(fd, CIOCCRYPT, &cryp) == -1)

 	{

 	if(errno == EINVAL) /* buffer is misaligned */

 	    {

 	    char *dcopy;

 	    dcopy=OPENSSL_malloc(len);

 	    memcpy(dcopy,data,len);

 	    cryp.src=dcopy;

 	    cryp.dst=cryp.src; // FIXME!!!

 	    if(ioctl(fd, CIOCCRYPT, &cryp) == -1)

 		{

 		err("CIOCCRYPT(MAC2) failed");

 		abort();

 		return 0;

 		}

 	    OPENSSL_free(dcopy);

 	    }

 	else

 	    {

 	    err("CIOCCRYPT(MAC) failed");

 	    abort();

 	    return 0;

 	    }

 	}

     //    printf("done\n");

     return 1;

     }

 static int dev_crypto_md5_update(EVP_MD_CTX *ctx,const void *data,

 				 unsigned long len)

     {

     MD_DATA *md_data=ctx->md_data;

     if(ctx->flags&EVP_MD_CTX_FLAG_ONESHOT)

 	return do_digest(md_data->sess.ses,md_data->md,data,len);

     md_data->data=OPENSSL_realloc(md_data->data,md_data->len+len);

     memcpy(md_data->data+md_data->len,data,len);

     md_data->len+=len;

     return 1;

     }	

 static int dev_crypto_md5_final(EVP_MD_CTX *ctx,unsigned char *md)

     {

     int ret;

     MD_DATA *md_data=ctx->md_data;

     if(ctx->flags&EVP_MD_CTX_FLAG_ONESHOT)

 	{

 	memcpy(md,md_data->md,MD5_DIGEST_LENGTH);

 	ret=1;

 	}

     else

 	{

 	ret=do_digest(md_data->sess.ses,md,md_data->data,md_data->len);

 	OPENSSL_free(md_data->data);

 	md_data->data=NULL;

 	md_data->len=0;

 	}

     return ret;

     }

 static int dev_crypto_md5_copy(EVP_MD_CTX *to,const EVP_MD_CTX *from)

     {

     const MD_DATA *from_md=from->md_data;

     MD_DATA *to_md=to->md_data;

     // How do we copy sessions?

     assert(from->digest->flags&EVP_MD_FLAG_ONESHOT);

     to_md->data=OPENSSL_malloc(from_md->len);

     memcpy(to_md->data,from_md->data,from_md->len);

     return 1;

     }

 static int dev_crypto_md5_cleanup(EVP_MD_CTX *ctx)

     {

     return dev_crypto_cleanup_digest(ctx->md_data);

     }

 static const EVP_MD md5_md=

     {

     NID_md5,

     NID_md5WithRSAEncryption,

     MD5_DIGEST_LENGTH,

     EVP_MD_FLAG_ONESHOT,	// XXX: set according to device info...

     dev_crypto_md5_init,

     dev_crypto_md5_update,

     dev_crypto_md5_final,

     dev_crypto_md5_copy,

     dev_crypto_md5_cleanup,

     EVP_PKEY_RSA_method,

     MD5_CBLOCK,

     sizeof(MD_DATA),

     };

 const EVP_MD *EVP_dev_crypto_md5(void)

     { return &md5_md; }

 #endif

 #endif