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

 /* 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
	/* 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