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openssl/crypto/engine/hw_openbsd_dev_crypto.c
Ben Laurie dbeac560aa Fixes.
2001-09-26 15:14:10 +00:00

556 lines
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/* Written by Ben Laurie <ben@algroup.co.uk> August 2001 */
/* ====================================================================
* Copyright (c) 1999-2001 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
* licensing@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.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com).
*
*/
#ifndef OPENSSL_OPENBSD_DEV_CRYPTO
static void *dummy=&dummy;
#else /* OPENSSL_OPENBSD_DEV_CRYPTO */
#include <fcntl.h>
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <assert.h>
#include <sys/ioctl.h>
#include <crypto/cryptodev.h>
#include <openssl/engine.h>
#include <openssl/evp.h>
#include "eng_int.h"
/* Maybe this is needed? ... */
#include "../evp/evp_locl.h"
/****************************************************/
/* Declare the normal generic ENGINE stuff here ... */
static int dev_crypto_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
const int **nids, int nid);
static int dev_crypto_digests(ENGINE *e, const EVP_MD **digest,
const int **nids, int nid);
static const char dev_crypto_id[] = "openbsd_dev_crypto";
static const char dev_crypto_name[] = "OpenBSD /dev/crypto";
static ENGINE *engine_openbsd_dev_crypto(void)
{
ENGINE *engine=ENGINE_new();
if(!ENGINE_set_id(engine, dev_crypto_id) ||
!ENGINE_set_name(engine, dev_crypto_name) ||
!ENGINE_set_ciphers(engine, dev_crypto_ciphers) ||
!ENGINE_set_digests(engine, dev_crypto_digests))
{
ENGINE_free(engine);
return NULL;
}
return engine;
}
void ENGINE_load_openbsd_dev_crypto(void)
{
/* Copied from eng_[openssl|dyn].c */
ENGINE *toadd = engine_openbsd_dev_crypto();
if(!toadd) return;
ENGINE_add(toadd);
ENGINE_free(toadd);
ERR_clear_error();
}
/******************************************************************************/
/* Clip in the stuff from crypto/evp/openbsd_hw.c here. NB: What has changed? */
/* I've removed the exposed EVP_*** functions, they're accessed through the */
/* "dev_crypto_[ciphers|digests]" handlers. I've also moved the EVP_CIPHER */
/* and EVP_MD structures to the bottom where they are close to the handlers */
/* that expose them. What should be done? The global data (file-descriptors, */
/* etc) should be put into ENGINE's ex_data support, and per-context data */
/* (also file-descriptors perhaps) should be put into the contexts. Also code */
/* formatting, fprintf statements, and OpenSSL-style error handling should be */
/* added (dynamically, like the other ENGINEs). Also, "dynamic" support */
/* be added to this ENGINE once it's up and running so that it could be built */
/* as a shared-library. What else? device initialisation should take place */
/* inside an ENGINE 'init()' handler (and likewise 'finish()'). ciphers and */
/* digests won't be used by the framework unless the ENGINE has been */
/* successfully initialised (that's one of the things you get for free) so */
/* initialisation, including returning failure if device setup fails, can be */
/* handled quite cleanly. This could presumably handle the opening (and then */
/* closing inside 'finish()') of the 'cryptodev_fd' file-descriptor). */
/* 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)
{
fprintf(stderr,"cleanup %d\n",CDATA(ctx)->ses);
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); }
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); }
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;
}
fprintf(stderr,"opened %d\n",md_data->sess.ses);
return 1;
}
static int dev_crypto_cleanup_digest(MD_DATA *md_data)
{
fprintf(stderr,"cleanup %d\n",md_data->sess.ses);
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);
}
/**************************************************************************/
/* Here are the moved declarations of the EVP_CIPHER and EVP_MD */
/* implementations. They're down here to be within easy editor-distance */
/* of the digests and ciphers handler functions. */
#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 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
};
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),
};
/****************************************************************/
/* Implement the dev_crypto_[ciphers|digests] handlers here ... */
static int cipher_nids[] = {NID_des_ede3_cbc, NID_rc4};
static int cipher_nids_num = 2;
static int digest_nids[] = {NID_md5};
static int digest_nids_num = 1;
static int dev_crypto_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
const int **nids, int nid)
{
if(!cipher)
{
/* We are returning a list of supported nids */
*nids = cipher_nids;
return cipher_nids_num;
}
/* We are being asked for a specific cipher */
if(nid == NID_rc4)
*cipher = &r4_cipher;
else if(nid == NID_des_ede3_cbc)
*cipher = &dev_crypto_des_ede3_cbc;
else
{
*cipher = NULL;
return 0;
}
return 1;
}
static int dev_crypto_digests(ENGINE *e, const EVP_MD **digest,
const int **nids, int nid)
{
if(!digest)
{
/* We are returning a list of supported nids */
*nids = digest_nids;
return digest_nids_num;
}
/* We are being asked for a specific digest */
if(nid == NID_md5)
*digest = &md5_md;
else
{
*digest = NULL;
return 0;
}
return 1;
}
#endif /* OPENSSL_OPENBSD_DEV_CRYPTO */
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