1 /* Written by Ben Laurie, 2001 */

     2 /*

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

     4  *

     5  * Redistribution and use in source and binary forms, with or without

     6  * modification, are permitted provided that the following conditions

     7  * are met:

     8  *

     9  * 1. Redistributions of source code must retain the above copyright

    10  *    notice, this list of conditions and the following disclaimer. 

    11  *

    12  * 2. Redistributions in binary form must reproduce the above copyright

    13  *    notice, this list of conditions and the following disclaimer in

    14  *    the documentation and/or other materials provided with the

    15  *    distribution.

    16  *

    17  * 3. All advertising materials mentioning features or use of this

    18  *    software must display the following acknowledgment:

    19  *    "This product includes software developed by the OpenSSL Project

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

    21  *

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

    23  *    endorse or promote products derived from this software without

    24  *    prior written permission. For written permission, please contact

    25  *    openssl-core@openssl.org.

    26  *

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

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

    29  *    permission of the OpenSSL Project.

    30  *

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

    32  *    acknowledgment:

    33  *    "This product includes software developed by the OpenSSL Project

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

    35  *

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

    37  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

    38  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

    39  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR

    40  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

    41  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

    42  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

    43  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

    44  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

    45  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

    46  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED

    47  * OF THE POSSIBILITY OF SUCH DAMAGE.

    48  */

    49 

    50 #include <openssl/evp.h>

    51 #include <openssl/objects.h>

    52 #include <openssl/rsa.h>

    53 #include "evp_locl.h"

    54 

    55 /* This stuff should now all be supported through

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

    57 static void *dummy=&dummy;

    58 

    59 #if 0

    60 

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

    62 #ifdef OPENSSL_OPENBSD_DEV_CRYPTO

    63 

    64 #include <fcntl.h>

    65 #include <stdio.h>

    66 #include <errno.h>

    67 #include <sys/ioctl.h>

    68 #include <crypto/cryptodev.h>

    69 #include <unistd.h>

    70 #include <assert.h>

    71 

    72 /* longest key supported in hardware */

    73 #define MAX_HW_KEY	24

    74 #define MAX_HW_IV	8

    75 

    76 #define MD5_DIGEST_LENGTH	16

    77 #define MD5_CBLOCK		64

    78 

    79 static int fd;

    80 static int dev_failed;

    81 

    82 typedef struct session_op session_op;

    83 

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

    85 

    86 static void err(const char *str)

    87     {

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

    89     }

    90 

    91 static int dev_crypto_init(session_op *ses)

    92     {

    93     if(dev_failed)

    94 	return 0;

    95     if(!fd)

    96 	{

    97 	int cryptodev_fd;

    98 

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

   100 	    {

   101 	    err("/dev/crypto");

   102 	    dev_failed=1;

   103 	    return 0;

   104 	    }

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

   106 	    {

   107 	    err("CRIOGET failed");

   108 	    close(cryptodev_fd);

   109 	    dev_failed=1;

   110 	    return 0;

   111 	    }

   112 	close(cryptodev_fd);

   113 	}

   114     assert(ses);

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

   116 

   117     return 1;

   118     }

   119 

   120 static int dev_crypto_cleanup(EVP_CIPHER_CTX *ctx)

   121     {

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

   123 	err("CIOCFSESSION failed");

   124 

   125     OPENSSL_free(CDATA(ctx)->key);

   126 

   127     return 1;

   128     }

   129 

   130 static int dev_crypto_init_key(EVP_CIPHER_CTX *ctx,int cipher,

   131 			       const unsigned char *key,int klen)

   132     {

   133     if(!dev_crypto_init(CDATA(ctx)))

   134 	return 0;

   135 

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

   137 

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

   139 

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

   141     

   142     CDATA(ctx)->cipher=cipher;

   143     CDATA(ctx)->keylen=klen;

   144 

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

   146 	{

   147 	err("CIOCGSESSION failed");

   148 	return 0;

   149 	}

   150     return 1;

   151     }

   152 

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

   154 			     const unsigned char *in,unsigned int inl)

   155     {

   156     struct crypt_op cryp;

   157     unsigned char lb[MAX_HW_IV];

   158 

   159     if(!inl)

   160 	return 1;

   161 

   162     assert(CDATA(ctx));

   163     assert(!dev_failed);

   164 

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

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

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

   168     cryp.flags=0;

   169     cryp.len=inl;

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

   171     cryp.src=(caddr_t)in;

   172     cryp.dst=(caddr_t)out;

   173     cryp.mac=0;

   174     if(ctx->cipher->iv_len)

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

   176 

   177     if(!ctx->encrypt)

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

   179 

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

   181 	{

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

   183 	    {

   184 	    unsigned int cinl=0;

   185 	    char *cin=NULL;

   186 	    char *cout=NULL;

   187 

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

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

   190 

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

   192 		{

   193 		cin=OPENSSL_malloc(cinl);

   194 		memcpy(cin,in,inl);

   195 		cryp.src=cin;

   196 		}

   197 

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

   199 		{

   200 		cout=OPENSSL_malloc(cinl);

   201 		cryp.dst=cout;

   202 		}

   203 

   204 	    cryp.len=cinl;

   205 

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

   207 		{

   208 		err("CIOCCRYPT(2) failed");

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

   210 		abort();

   211 		return 0;

   212 		}

   213 		

   214 	    if(cout)

   215 		{

   216 		memcpy(out,cout,inl);

   217 		OPENSSL_free(cout);

   218 		}

   219 	    if(cin)

   220 		OPENSSL_free(cin);

   221 	    }

   222 	else 

   223 	    {	    

   224 	    err("CIOCCRYPT failed");

   225 	    abort();

   226 	    return 0;

   227 	    }

   228 	}

   229 

   230     if(ctx->encrypt)

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

   232     else

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

   234 

   235     return 1;

   236     }

   237 

   238 static int dev_crypto_des_ede3_init_key(EVP_CIPHER_CTX *ctx,

   239 					const unsigned char *key,

   240 					const unsigned char *iv, int enc)

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

   242 

   243 #define dev_crypto_des_ede3_cbc_cipher dev_crypto_cipher

   244 

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

   246 		     0, dev_crypto_des_ede3_init_key,

   247 		     dev_crypto_cleanup, 

   248 		     EVP_CIPHER_set_asn1_iv,

   249 		     EVP_CIPHER_get_asn1_iv,

   250 		     NULL)

   251 

   252 static int dev_crypto_rc4_init_key(EVP_CIPHER_CTX *ctx,

   253 					const unsigned char *key,

   254 					const unsigned char *iv, int enc)

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

   256 

   257 static const EVP_CIPHER r4_cipher=

   258     {

   259     NID_rc4,

   260     1,16,0,	/* FIXME: key should be up to 256 bytes */

   261     EVP_CIPH_VARIABLE_LENGTH,

   262     dev_crypto_rc4_init_key,

   263     dev_crypto_cipher,

   264     dev_crypto_cleanup,

   265     sizeof(session_op),

   266     NULL,

   267     NULL,

   268     NULL

   269     };

   270 

   271 const EVP_CIPHER *EVP_dev_crypto_rc4(void)

   272     { return &r4_cipher; }

   273 

   274 typedef struct

   275     {

   276     session_op sess;

   277     char *data;

   278     int len;

   279     unsigned char md[EVP_MAX_MD_SIZE];

   280     } MD_DATA;

   281 

   282 static int dev_crypto_init_digest(MD_DATA *md_data,int mac)

   283     {

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

   285 	return 0;

   286 

   287     md_data->len=0;

   288     md_data->data=NULL;

   289 

   290     md_data->sess.mac=mac;

   291 

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

   293 	{

   294 	err("CIOCGSESSION failed");

   295 	return 0;

   296 	}

   297     return 1;

   298     }

   299 

   300 static int dev_crypto_cleanup_digest(MD_DATA *md_data)

   301     {

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

   303 	{

   304 	err("CIOCFSESSION failed");

   305 	return 0;

   306 	}

   307 

   308     return 1;

   309     }

   310 

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

   312 /* FIXME: move accumulation to the framework */

   313 static int dev_crypto_md5_init(EVP_MD_CTX *ctx)

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

   315 

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

   317     {

   318     struct crypt_op cryp;

   319     static unsigned char md5zero[16]=

   320 	{

   321 	0xd4,0x1d,0x8c,0xd9,0x8f,0x00,0xb2,0x04,

   322 	0xe9,0x80,0x09,0x98,0xec,0xf8,0x42,0x7e

   323 	};

   324 

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

   326     if(!len)

   327 	{

   328 	memcpy(md,md5zero,16);

   329 	return 1;

   330 	}

   331 

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

   333     cryp.ses=ses;

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

   335     cryp.len=len;

   336     cryp.src=(caddr_t)data;

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

   338     cryp.mac=(caddr_t)md;

   339 

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

   341 	{

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

   343 	    {

   344 	    char *dcopy;

   345 

   346 	    dcopy=OPENSSL_malloc(len);

   347 	    memcpy(dcopy,data,len);

   348 	    cryp.src=dcopy;

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

   350 

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

   352 		{

   353 		err("CIOCCRYPT(MAC2) failed");

   354 		abort();

   355 		return 0;

   356 		}

   357 	    OPENSSL_free(dcopy);

   358 	    }

   359 	else

   360 	    {

   361 	    err("CIOCCRYPT(MAC) failed");

   362 	    abort();

   363 	    return 0;

   364 	    }

   365 	}

   366     //    printf("done\n");

   367 

   368     return 1;

   369     }

   370 

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

   372 				 unsigned long len)

   373     {

   374     MD_DATA *md_data=ctx->md_data;

   375 

   376     if(ctx->flags&EVP_MD_CTX_FLAG_ONESHOT)

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

   378 

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

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

   381     md_data->len+=len;

   382 

   383     return 1;

   384     }	

   385 

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

   387     {

   388     int ret;

   389     MD_DATA *md_data=ctx->md_data;

   390 

   391     if(ctx->flags&EVP_MD_CTX_FLAG_ONESHOT)

   392 	{

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

   394 	ret=1;

   395 	}

   396     else

   397 	{

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

   399 	OPENSSL_free(md_data->data);

   400 	md_data->data=NULL;

   401 	md_data->len=0;

   402 	}

   403 

   404     return ret;

   405     }

   406 

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

   408     {

   409     const MD_DATA *from_md=from->md_data;

   410     MD_DATA *to_md=to->md_data;

   411 

   412     // How do we copy sessions?

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

   414 

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

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

   417 

   418     return 1;

   419     }

   420 

   421 static int dev_crypto_md5_cleanup(EVP_MD_CTX *ctx)

   422     {

   423     return dev_crypto_cleanup_digest(ctx->md_data);

   424     }

   425 

   426 static const EVP_MD md5_md=

   427     {

   428     NID_md5,

   429     NID_md5WithRSAEncryption,

   430     MD5_DIGEST_LENGTH,

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

   432     dev_crypto_md5_init,

   433     dev_crypto_md5_update,

   434     dev_crypto_md5_final,

   435     dev_crypto_md5_copy,

   436     dev_crypto_md5_cleanup,

   437     EVP_PKEY_RSA_method,

   438     MD5_CBLOCK,

   439     sizeof(MD_DATA),

   440     };

   441 

   442 const EVP_MD *EVP_dev_crypto_md5(void)

   443     { return &md5_md; }

   444 

   445 #endif

   446 #endif