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openssl/crypto/evp/openbsd_hw.c

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/* 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 <fcntl.h>
#include <stdio.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <crypto/cryptodev.h>
#include <unistd.h>
#include <openssl/evp.h>
#include <openssl/objects.h>
#include <openssl/rsa.h>
#include "evp_locl.h"
#include <assert.h>
/* check flag after headers to ensure make depend works */
#ifdef OPENSSL_OPENBSD_DEV_CRYPTO
/* 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;
}
/* 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);
return 1;
}
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 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,
EVP_PKEY_RSA_method,
MD5_CBLOCK,
sizeof(MD_DATA),
};
const EVP_MD *EVP_dev_crypto_md5(void)
{ return &md5_md; }
#endif
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