447 lines
10 KiB
C
447 lines
10 KiB
C
/* Written by Ben Laurie, 2001 */
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/*
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* Copyright (c) 2001 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* openssl-core@openssl.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <openssl/evp.h>
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#include <openssl/objects.h>
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#include <openssl/rsa.h>
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#include "evp_locl.h"
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/* This stuff should now all be supported through
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* crypto/engine/hw_openbsd_dev_crypto.c unless I botched it up */
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static void *dummy=&dummy;
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#if 0
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/* check flag after OpenSSL headers to ensure make depend works */
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#ifdef OPENSSL_OPENBSD_DEV_CRYPTO
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#include <fcntl.h>
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#include <stdio.h>
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#include <errno.h>
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#include <sys/ioctl.h>
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#include <crypto/cryptodev.h>
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#include <unistd.h>
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#include <assert.h>
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/* longest key supported in hardware */
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#define MAX_HW_KEY 24
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#define MAX_HW_IV 8
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#define MD5_DIGEST_LENGTH 16
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#define MD5_CBLOCK 64
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static int fd;
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static int dev_failed;
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typedef struct session_op session_op;
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#define CDATA(ctx) EVP_C_DATA(session_op,ctx)
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static void err(const char *str)
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{
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fprintf(stderr,"%s: errno %d\n",str,errno);
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}
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static int dev_crypto_init(session_op *ses)
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{
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if(dev_failed)
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return 0;
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if(!fd)
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{
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int cryptodev_fd;
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if ((cryptodev_fd=open("/dev/crypto",O_RDWR,0)) < 0)
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{
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err("/dev/crypto");
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dev_failed=1;
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return 0;
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}
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if (ioctl(cryptodev_fd,CRIOGET,&fd) == -1)
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{
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err("CRIOGET failed");
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close(cryptodev_fd);
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dev_failed=1;
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return 0;
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}
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close(cryptodev_fd);
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}
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assert(ses);
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memset(ses,'\0',sizeof *ses);
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return 1;
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}
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static int dev_crypto_cleanup(EVP_CIPHER_CTX *ctx)
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{
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if(ioctl(fd,CIOCFSESSION,&CDATA(ctx)->ses) == -1)
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err("CIOCFSESSION failed");
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OPENSSL_free(CDATA(ctx)->key);
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return 1;
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}
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static int dev_crypto_init_key(EVP_CIPHER_CTX *ctx,int cipher,
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const unsigned char *key,int klen)
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{
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if(!dev_crypto_init(CDATA(ctx)))
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return 0;
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CDATA(ctx)->key=OPENSSL_malloc(MAX_HW_KEY);
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assert(ctx->cipher->iv_len <= MAX_HW_IV);
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memcpy(CDATA(ctx)->key,key,klen);
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CDATA(ctx)->cipher=cipher;
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CDATA(ctx)->keylen=klen;
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if (ioctl(fd,CIOCGSESSION,CDATA(ctx)) == -1)
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{
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err("CIOCGSESSION failed");
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return 0;
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}
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return 1;
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}
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static int dev_crypto_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
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const unsigned char *in,unsigned int inl)
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{
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struct crypt_op cryp;
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unsigned char lb[MAX_HW_IV];
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if(!inl)
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return 1;
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assert(CDATA(ctx));
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assert(!dev_failed);
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memset(&cryp,'\0',sizeof cryp);
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cryp.ses=CDATA(ctx)->ses;
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cryp.op=ctx->encrypt ? COP_ENCRYPT : COP_DECRYPT;
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cryp.flags=0;
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cryp.len=inl;
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assert((inl&(ctx->cipher->block_size-1)) == 0);
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cryp.src=(caddr_t)in;
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cryp.dst=(caddr_t)out;
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cryp.mac=0;
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if(ctx->cipher->iv_len)
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cryp.iv=(caddr_t)ctx->iv;
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if(!ctx->encrypt)
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memcpy(lb,&in[cryp.len-ctx->cipher->iv_len],ctx->cipher->iv_len);
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if(ioctl(fd, CIOCCRYPT, &cryp) == -1)
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{
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if(errno == EINVAL) /* buffers are misaligned */
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{
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unsigned int cinl=0;
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char *cin=NULL;
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char *cout=NULL;
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/* NB: this can only make cinl != inl with stream ciphers */
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cinl=(inl+3)/4*4;
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if(((unsigned long)in&3) || cinl != inl)
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{
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cin=OPENSSL_malloc(cinl);
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memcpy(cin,in,inl);
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cryp.src=cin;
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}
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if(((unsigned long)out&3) || cinl != inl)
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{
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cout=OPENSSL_malloc(cinl);
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cryp.dst=cout;
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}
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cryp.len=cinl;
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if(ioctl(fd, CIOCCRYPT, &cryp) == -1)
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{
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err("CIOCCRYPT(2) failed");
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printf("src=%p dst=%p\n",cryp.src,cryp.dst);
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abort();
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return 0;
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}
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if(cout)
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{
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memcpy(out,cout,inl);
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OPENSSL_free(cout);
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}
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if(cin)
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OPENSSL_free(cin);
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}
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else
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{
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err("CIOCCRYPT failed");
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abort();
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return 0;
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}
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}
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if(ctx->encrypt)
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memcpy(ctx->iv,&out[cryp.len-ctx->cipher->iv_len],ctx->cipher->iv_len);
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else
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memcpy(ctx->iv,lb,ctx->cipher->iv_len);
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return 1;
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}
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static int dev_crypto_des_ede3_init_key(EVP_CIPHER_CTX *ctx,
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const unsigned char *key,
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const unsigned char *iv, int enc)
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{ return dev_crypto_init_key(ctx,CRYPTO_3DES_CBC,key,24); }
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#define dev_crypto_des_ede3_cbc_cipher dev_crypto_cipher
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BLOCK_CIPHER_def_cbc(dev_crypto_des_ede3, session_op, NID_des_ede3, 8, 24, 8,
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0, dev_crypto_des_ede3_init_key,
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dev_crypto_cleanup,
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EVP_CIPHER_set_asn1_iv,
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EVP_CIPHER_get_asn1_iv,
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NULL)
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static int dev_crypto_rc4_init_key(EVP_CIPHER_CTX *ctx,
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const unsigned char *key,
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const unsigned char *iv, int enc)
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{ return dev_crypto_init_key(ctx,CRYPTO_ARC4,key,16); }
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static const EVP_CIPHER r4_cipher=
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{
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NID_rc4,
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1,16,0, /* FIXME: key should be up to 256 bytes */
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EVP_CIPH_VARIABLE_LENGTH,
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dev_crypto_rc4_init_key,
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dev_crypto_cipher,
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dev_crypto_cleanup,
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sizeof(session_op),
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NULL,
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NULL,
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NULL
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};
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const EVP_CIPHER *EVP_dev_crypto_rc4(void)
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{ return &r4_cipher; }
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typedef struct
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{
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session_op sess;
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char *data;
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int len;
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unsigned char md[EVP_MAX_MD_SIZE];
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} MD_DATA;
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static int dev_crypto_init_digest(MD_DATA *md_data,int mac)
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{
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if(!dev_crypto_init(&md_data->sess))
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return 0;
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md_data->len=0;
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md_data->data=NULL;
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md_data->sess.mac=mac;
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if (ioctl(fd,CIOCGSESSION,&md_data->sess) == -1)
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{
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err("CIOCGSESSION failed");
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return 0;
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}
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return 1;
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}
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static int dev_crypto_cleanup_digest(MD_DATA *md_data)
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{
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if (ioctl(fd,CIOCFSESSION,&md_data->sess.ses) == -1)
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{
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err("CIOCFSESSION failed");
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return 0;
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}
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return 1;
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}
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/* FIXME: if device can do chained MACs, then don't accumulate */
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/* FIXME: move accumulation to the framework */
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static int dev_crypto_md5_init(EVP_MD_CTX *ctx)
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{ return dev_crypto_init_digest(ctx->md_data,CRYPTO_MD5); }
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static int do_digest(int ses,unsigned char *md,const void *data,int len)
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{
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struct crypt_op cryp;
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static unsigned char md5zero[16]=
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{
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0xd4,0x1d,0x8c,0xd9,0x8f,0x00,0xb2,0x04,
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0xe9,0x80,0x09,0x98,0xec,0xf8,0x42,0x7e
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};
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/* some cards can't do zero length */
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if(!len)
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{
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memcpy(md,md5zero,16);
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return 1;
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}
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memset(&cryp,'\0',sizeof cryp);
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cryp.ses=ses;
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cryp.op=COP_ENCRYPT;/* required to do the MAC rather than check it */
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cryp.len=len;
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cryp.src=(caddr_t)data;
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cryp.dst=(caddr_t)data; // FIXME!!!
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cryp.mac=(caddr_t)md;
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if(ioctl(fd, CIOCCRYPT, &cryp) == -1)
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{
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if(errno == EINVAL) /* buffer is misaligned */
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{
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char *dcopy;
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dcopy=OPENSSL_malloc(len);
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memcpy(dcopy,data,len);
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cryp.src=dcopy;
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cryp.dst=cryp.src; // FIXME!!!
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if(ioctl(fd, CIOCCRYPT, &cryp) == -1)
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{
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err("CIOCCRYPT(MAC2) failed");
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abort();
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return 0;
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}
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OPENSSL_free(dcopy);
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}
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else
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{
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err("CIOCCRYPT(MAC) failed");
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abort();
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return 0;
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}
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}
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// printf("done\n");
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return 1;
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}
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static int dev_crypto_md5_update(EVP_MD_CTX *ctx,const void *data,
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unsigned long len)
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{
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MD_DATA *md_data=ctx->md_data;
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if(ctx->flags&EVP_MD_CTX_FLAG_ONESHOT)
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return do_digest(md_data->sess.ses,md_data->md,data,len);
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md_data->data=OPENSSL_realloc(md_data->data,md_data->len+len);
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memcpy(md_data->data+md_data->len,data,len);
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md_data->len+=len;
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return 1;
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}
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static int dev_crypto_md5_final(EVP_MD_CTX *ctx,unsigned char *md)
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{
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int ret;
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MD_DATA *md_data=ctx->md_data;
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if(ctx->flags&EVP_MD_CTX_FLAG_ONESHOT)
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{
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memcpy(md,md_data->md,MD5_DIGEST_LENGTH);
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ret=1;
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}
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else
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{
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ret=do_digest(md_data->sess.ses,md,md_data->data,md_data->len);
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OPENSSL_free(md_data->data);
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md_data->data=NULL;
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md_data->len=0;
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}
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return ret;
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}
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static int dev_crypto_md5_copy(EVP_MD_CTX *to,const EVP_MD_CTX *from)
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{
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const MD_DATA *from_md=from->md_data;
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MD_DATA *to_md=to->md_data;
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// How do we copy sessions?
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assert(from->digest->flags&EVP_MD_FLAG_ONESHOT);
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to_md->data=OPENSSL_malloc(from_md->len);
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memcpy(to_md->data,from_md->data,from_md->len);
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return 1;
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}
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static int dev_crypto_md5_cleanup(EVP_MD_CTX *ctx)
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{
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return dev_crypto_cleanup_digest(ctx->md_data);
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}
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static const EVP_MD md5_md=
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{
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NID_md5,
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NID_md5WithRSAEncryption,
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MD5_DIGEST_LENGTH,
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EVP_MD_FLAG_ONESHOT, // XXX: set according to device info...
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dev_crypto_md5_init,
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dev_crypto_md5_update,
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dev_crypto_md5_final,
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dev_crypto_md5_copy,
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dev_crypto_md5_cleanup,
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EVP_PKEY_RSA_method,
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MD5_CBLOCK,
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sizeof(MD_DATA),
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};
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const EVP_MD *EVP_dev_crypto_md5(void)
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{ return &md5_md; }
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#endif
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#endif
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