355 lines
9.7 KiB
C
355 lines
9.7 KiB
C
/* crypto/engine/hw_nuron.c */
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/* Written by Ben Laurie for the OpenSSL Project, leaning heavily on Geoff
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* Thorpe's Atalla implementation.
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*/
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/* ====================================================================
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* Copyright (c) 2000 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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* licensing@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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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#include <stdio.h>
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#include <openssl/crypto.h>
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#include "cryptlib.h"
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#include <openssl/dso.h>
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#include <openssl/engine.h>
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#ifndef OPENSSL_NO_HW
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#ifndef OPENSSL_NO_HW_NURON
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static const char def_NURON_LIBNAME[] = "nuronssl";
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static const char *NURON_LIBNAME = def_NURON_LIBNAME;
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static const char *NURON_F1 = "nuron_mod_exp";
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/* The definitions for control commands specific to this engine */
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#define NURON_CMD_SO_PATH ENGINE_CMD_BASE
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static const ENGINE_CMD_DEFN nuron_cmd_defns[] = {
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{NURON_CMD_SO_PATH,
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"SO_PATH",
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"Specifies the path to the 'nuronssl' shared library",
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ENGINE_CMD_FLAG_STRING},
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{0, NULL, NULL, 0}
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};
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typedef int tfnModExp(BIGNUM *r,const BIGNUM *a,const BIGNUM *p,const BIGNUM *m);
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static tfnModExp *pfnModExp = NULL;
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static DSO *pvDSOHandle = NULL;
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static int nuron_init(ENGINE *e)
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{
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if(pvDSOHandle != NULL)
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{
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ENGINEerr(ENGINE_F_NURON_INIT,ENGINE_R_ALREADY_LOADED);
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return 0;
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}
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pvDSOHandle = DSO_load(NULL, NURON_LIBNAME, NULL,
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DSO_FLAG_NAME_TRANSLATION_EXT_ONLY);
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if(!pvDSOHandle)
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{
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ENGINEerr(ENGINE_F_NURON_INIT,ENGINE_R_DSO_NOT_FOUND);
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return 0;
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}
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pfnModExp = (tfnModExp *)DSO_bind_func(pvDSOHandle, NURON_F1);
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if(!pfnModExp)
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{
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ENGINEerr(ENGINE_F_NURON_INIT,ENGINE_R_DSO_FUNCTION_NOT_FOUND);
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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 nuron_finish(ENGINE *e)
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{
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if(pvDSOHandle == NULL)
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{
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ENGINEerr(ENGINE_F_NURON_FINISH,ENGINE_R_NOT_LOADED);
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return 0;
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}
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if(!DSO_free(pvDSOHandle))
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{
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ENGINEerr(ENGINE_F_NURON_FINISH,ENGINE_R_DSO_FAILURE);
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return 0;
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}
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pvDSOHandle=NULL;
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pfnModExp=NULL;
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return 1;
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}
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static int nuron_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)())
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{
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int initialised = ((pvDSOHandle == NULL) ? 0 : 1);
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switch(cmd)
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{
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case NURON_CMD_SO_PATH:
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if(p == NULL)
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{
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ENGINEerr(ENGINE_F_NURON_CTRL,ERR_R_PASSED_NULL_PARAMETER);
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return 0;
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}
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if(initialised)
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{
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ENGINEerr(ENGINE_F_NURON_CTRL,ENGINE_R_ALREADY_LOADED);
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return 0;
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}
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NURON_LIBNAME = (const char *)p;
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return 1;
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default:
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break;
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}
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ENGINEerr(ENGINE_F_NURON_CTRL,ENGINE_R_CTRL_COMMAND_NOT_IMPLEMENTED);
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return 0;
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}
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static int nuron_mod_exp(BIGNUM *r,const BIGNUM *a,const BIGNUM *p,
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const BIGNUM *m,BN_CTX *ctx)
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{
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if(!pvDSOHandle)
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{
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ENGINEerr(ENGINE_F_NURON_MOD_EXP,ENGINE_R_NOT_LOADED);
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return 0;
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}
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return pfnModExp(r,a,p,m);
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}
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#ifndef OPENSSL_NO_RSA
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static int nuron_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa)
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{
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return nuron_mod_exp(r0,I,rsa->d,rsa->n,NULL);
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}
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#endif
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#ifndef OPENSSL_NO_DSA
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/* This code was liberated and adapted from the commented-out code in
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* dsa_ossl.c. Because of the unoptimised form of the Atalla acceleration
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* (it doesn't have a CRT form for RSA), this function means that an
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* Atalla system running with a DSA server certificate can handshake
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* around 5 or 6 times faster/more than an equivalent system running with
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* RSA. Just check out the "signs" statistics from the RSA and DSA parts
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* of "openssl speed -engine atalla dsa1024 rsa1024". */
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static int nuron_dsa_mod_exp(DSA *dsa, BIGNUM *rr, BIGNUM *a1,
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BIGNUM *p1, BIGNUM *a2, BIGNUM *p2, BIGNUM *m,
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BN_CTX *ctx, BN_MONT_CTX *in_mont)
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{
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BIGNUM t;
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int to_return = 0;
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BN_init(&t);
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/* let rr = a1 ^ p1 mod m */
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if (!nuron_mod_exp(rr,a1,p1,m,ctx))
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goto end;
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/* let t = a2 ^ p2 mod m */
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if (!nuron_mod_exp(&t,a2,p2,m,ctx))
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goto end;
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/* let rr = rr * t mod m */
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if (!BN_mod_mul(rr,rr,&t,m,ctx))
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goto end;
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to_return = 1;
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end:
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BN_free(&t);
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return to_return;
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}
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static int nuron_mod_exp_dsa(DSA *dsa, BIGNUM *r, BIGNUM *a,
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const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
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BN_MONT_CTX *m_ctx)
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{
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return nuron_mod_exp(r, a, p, m, ctx);
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}
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#endif
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/* This function is aliased to mod_exp (with the mont stuff dropped). */
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static int nuron_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
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const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
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{
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return nuron_mod_exp(r, a, p, m, ctx);
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}
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#ifndef OPENSSL_NO_DH
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/* This function is aliased to mod_exp (with the dh and mont dropped). */
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static int nuron_mod_exp_dh(const DH *dh, BIGNUM *r,
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const BIGNUM *a, const BIGNUM *p,
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const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
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{
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return nuron_mod_exp(r, a, p, m, ctx);
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}
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#endif
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#ifndef OPENSSL_NO_RSA
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static RSA_METHOD nuron_rsa =
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{
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"Nuron RSA method",
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NULL,
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NULL,
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NULL,
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NULL,
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nuron_rsa_mod_exp,
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nuron_mod_exp_mont,
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NULL,
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NULL,
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0,
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NULL,
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NULL,
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NULL
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};
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#endif
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#ifndef OPENSSL_NO_DSA
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static DSA_METHOD nuron_dsa =
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{
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"Nuron DSA method",
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NULL, /* dsa_do_sign */
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NULL, /* dsa_sign_setup */
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NULL, /* dsa_do_verify */
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nuron_dsa_mod_exp, /* dsa_mod_exp */
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nuron_mod_exp_dsa, /* bn_mod_exp */
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NULL, /* init */
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NULL, /* finish */
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0, /* flags */
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NULL /* app_data */
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};
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#endif
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#ifndef OPENSSL_NO_DH
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static DH_METHOD nuron_dh =
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{
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"Nuron DH method",
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NULL,
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NULL,
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nuron_mod_exp_dh,
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NULL,
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NULL,
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0,
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NULL
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};
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#endif
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/* Constants used when creating the ENGINE */
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static const char *engine_nuron_id = "nuron";
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static const char *engine_nuron_name = "Nuron hardware engine support";
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/* As this is only ever called once, there's no need for locking
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* (indeed - the lock will already be held by our caller!!!) */
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ENGINE *ENGINE_nuron()
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{
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#ifndef OPENSSL_NO_RSA
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const RSA_METHOD *meth1;
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#endif
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#ifndef OPENSSL_NO_DSA
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const DSA_METHOD *meth2;
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#endif
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#ifndef OPENSSL_NO_DH
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const DH_METHOD *meth3;
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#endif
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ENGINE *ret = ENGINE_new();
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if(!ret)
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return NULL;
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if(!ENGINE_set_id(ret, engine_nuron_id) ||
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!ENGINE_set_name(ret, engine_nuron_name) ||
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#ifndef OPENSSL_NO_RSA
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!ENGINE_set_RSA(ret, &nuron_rsa) ||
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#endif
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#ifndef OPENSSL_NO_DSA
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!ENGINE_set_DSA(ret, &nuron_dsa) ||
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#endif
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#ifndef OPENSSL_NO_DH
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!ENGINE_set_DH(ret, &nuron_dh) ||
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#endif
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!ENGINE_set_BN_mod_exp(ret, nuron_mod_exp) ||
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!ENGINE_set_init_function(ret, nuron_init) ||
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!ENGINE_set_finish_function(ret, nuron_finish) ||
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!ENGINE_set_ctrl_function(ret, nuron_ctrl) ||
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!ENGINE_set_cmd_defns(ret, nuron_cmd_defns))
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{
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ENGINE_free(ret);
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return NULL;
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}
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#ifndef OPENSSL_NO_RSA
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/* We know that the "PKCS1_SSLeay()" functions hook properly
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* to the nuron-specific mod_exp and mod_exp_crt so we use
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* those functions. NB: We don't use ENGINE_openssl() or
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* anything "more generic" because something like the RSAref
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* code may not hook properly, and if you own one of these
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* cards then you have the right to do RSA operations on it
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* anyway! */
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meth1=RSA_PKCS1_SSLeay();
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nuron_rsa.rsa_pub_enc=meth1->rsa_pub_enc;
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nuron_rsa.rsa_pub_dec=meth1->rsa_pub_dec;
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nuron_rsa.rsa_priv_enc=meth1->rsa_priv_enc;
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nuron_rsa.rsa_priv_dec=meth1->rsa_priv_dec;
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#endif
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#ifndef OPENSSL_NO_DSA
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/* Use the DSA_OpenSSL() method and just hook the mod_exp-ish
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* bits. */
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meth2=DSA_OpenSSL();
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nuron_dsa.dsa_do_sign=meth2->dsa_do_sign;
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nuron_dsa.dsa_sign_setup=meth2->dsa_sign_setup;
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nuron_dsa.dsa_do_verify=meth2->dsa_do_verify;
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#endif
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#ifndef OPENSSL_NO_DH
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/* Much the same for Diffie-Hellman */
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meth3=DH_OpenSSL();
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nuron_dh.generate_key=meth3->generate_key;
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nuron_dh.compute_key=meth3->compute_key;
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#endif
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return ret;
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}
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#endif /* !OPENSSL_NO_HW_NURON */
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#endif /* !OPENSSL_NO_HW */
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