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openssl/engines/e_nuron.c
Rich Salz b548a1f11c free null cleanup finale 
Don't check for NULL before calling OPENSSL_free

Reviewed-by: Richard Levitte <levitte@openssl.org>
2015-05-01 10:02:07 -04:00

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/* crypto/engine/hw_nuron.c */
/*
* Written by Ben Laurie for the OpenSSL Project, leaning heavily on Geoff
* Thorpe's Atalla implementation.
*/
/* ====================================================================
* Copyright (c) 2000-2001 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).
*
*/
#include <stdio.h>
#include <string.h>
#include <openssl/crypto.h>
#include <openssl/buffer.h>
#include <openssl/dso.h>
#include <openssl/engine.h>
#ifndef OPENSSL_NO_RSA
# include <openssl/rsa.h>
#endif
#ifndef OPENSSL_NO_DSA
# include <openssl/dsa.h>
#endif
#ifndef OPENSSL_NO_DH
# include <openssl/dh.h>
#endif
#include <openssl/bn.h>
#ifndef OPENSSL_NO_HW
# ifndef OPENSSL_NO_HW_NURON
# define NURON_LIB_NAME "nuron engine"
# include "e_nuron_err.c"
static const char *NURON_LIBNAME = NULL;
static const char *get_NURON_LIBNAME(void)
{
if (NURON_LIBNAME)
return NURON_LIBNAME;
return "nuronssl";
}
static void free_NURON_LIBNAME(void)
{
OPENSSL_free(NURON_LIBNAME);
NURON_LIBNAME = NULL;
}
static long set_NURON_LIBNAME(const char *name)
{
free_NURON_LIBNAME();
return (((NURON_LIBNAME = BUF_strdup(name)) != NULL) ? 1 : 0);
}
static const char *NURON_F1 = "nuron_mod_exp";
/* The definitions for control commands specific to this engine */
# define NURON_CMD_SO_PATH ENGINE_CMD_BASE
static const ENGINE_CMD_DEFN nuron_cmd_defns[] = {
{NURON_CMD_SO_PATH,
"SO_PATH",
"Specifies the path to the 'nuronssl' shared library",
ENGINE_CMD_FLAG_STRING},
{0, NULL, NULL, 0}
};
typedef int tfnModExp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
const BIGNUM *m);
static tfnModExp *pfnModExp = NULL;
static DSO *pvDSOHandle = NULL;
static int nuron_destroy(ENGINE *e)
{
free_NURON_LIBNAME();
ERR_unload_NURON_strings();
return 1;
}
static int nuron_init(ENGINE *e)
{
if (pvDSOHandle != NULL) {
NURONerr(NURON_F_NURON_INIT, NURON_R_ALREADY_LOADED);
return 0;
}
pvDSOHandle = DSO_load(NULL, get_NURON_LIBNAME(), NULL,
DSO_FLAG_NAME_TRANSLATION_EXT_ONLY);
if (!pvDSOHandle) {
NURONerr(NURON_F_NURON_INIT, NURON_R_DSO_NOT_FOUND);
return 0;
}
pfnModExp = (tfnModExp *) DSO_bind_func(pvDSOHandle, NURON_F1);
if (!pfnModExp) {
NURONerr(NURON_F_NURON_INIT, NURON_R_DSO_FUNCTION_NOT_FOUND);
return 0;
}
return 1;
}
static int nuron_finish(ENGINE *e)
{
free_NURON_LIBNAME();
if (pvDSOHandle == NULL) {
NURONerr(NURON_F_NURON_FINISH, NURON_R_NOT_LOADED);
return 0;
}
if (!DSO_free(pvDSOHandle)) {
NURONerr(NURON_F_NURON_FINISH, NURON_R_DSO_FAILURE);
return 0;
}
pvDSOHandle = NULL;
pfnModExp = NULL;
return 1;
}
static int nuron_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f) (void))
{
int initialised = ((pvDSOHandle == NULL) ? 0 : 1);
switch (cmd) {
case NURON_CMD_SO_PATH:
if (p == NULL) {
NURONerr(NURON_F_NURON_CTRL, ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
if (initialised) {
NURONerr(NURON_F_NURON_CTRL, NURON_R_ALREADY_LOADED);
return 0;
}
return set_NURON_LIBNAME((const char *)p);
default:
break;
}
NURONerr(NURON_F_NURON_CTRL, NURON_R_CTRL_COMMAND_NOT_IMPLEMENTED);
return 0;
}
static int nuron_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx)
{
if (!pvDSOHandle) {
NURONerr(NURON_F_NURON_MOD_EXP, NURON_R_NOT_LOADED);
return 0;
}
return pfnModExp(r, a, p, m);
}
# ifndef OPENSSL_NO_RSA
static int nuron_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa,
BN_CTX *ctx)
{
return nuron_mod_exp(r0, I, rsa->d, rsa->n, ctx);
}
# endif
# ifndef OPENSSL_NO_DSA
/*
* This code was liberated and adapted from the commented-out code in
* dsa_ossl.c. Because of the unoptimised form of the Atalla acceleration (it
* doesn't have a CRT form for RSA), this function means that an Atalla
* system running with a DSA server certificate can handshake around 5 or 6
* times faster/more than an equivalent system running with RSA. Just check
* out the "signs" statistics from the RSA and DSA parts of "openssl speed
* -engine atalla dsa1024 rsa1024".
*/
static int nuron_dsa_mod_exp(DSA *dsa, BIGNUM *rr, BIGNUM *a1,
BIGNUM *p1, BIGNUM *a2, BIGNUM *p2, BIGNUM *m,
BN_CTX *ctx, BN_MONT_CTX *in_mont)
{
BIGNUM t;
int to_return = 0;
BN_init(&t);
/* let rr = a1 ^ p1 mod m */
if (!nuron_mod_exp(rr, a1, p1, m, ctx))
goto end;
/* let t = a2 ^ p2 mod m */
if (!nuron_mod_exp(&t, a2, p2, m, ctx))
goto end;
/* let rr = rr * t mod m */
if (!BN_mod_mul(rr, rr, &t, m, ctx))
goto end;
to_return = 1;
end:
BN_free(&t);
return to_return;
}
static int nuron_mod_exp_dsa(DSA *dsa, BIGNUM *r, BIGNUM *a,
const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
BN_MONT_CTX *m_ctx)
{
return nuron_mod_exp(r, a, p, m, ctx);
}
# endif
/* This function is aliased to mod_exp (with the mont stuff dropped). */
# ifndef OPENSSL_NO_RSA
static int nuron_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx,
BN_MONT_CTX *m_ctx)
{
return nuron_mod_exp(r, a, p, m, ctx);
}
# endif
# ifndef OPENSSL_NO_DH
/* This function is aliased to mod_exp (with the dh and mont dropped). */
static int nuron_mod_exp_dh(const DH *dh, BIGNUM *r,
const BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
{
return nuron_mod_exp(r, a, p, m, ctx);
}
# endif
# ifndef OPENSSL_NO_RSA
static RSA_METHOD nuron_rsa = {
"Nuron RSA method",
NULL,
NULL,
NULL,
NULL,
nuron_rsa_mod_exp,
nuron_mod_exp_mont,
NULL,
NULL,
0,
NULL,
NULL,
NULL,
NULL
};
# endif
# ifndef OPENSSL_NO_DSA
static DSA_METHOD nuron_dsa = {
"Nuron DSA method",
NULL, /* dsa_do_sign */
NULL, /* dsa_sign_setup */
NULL, /* dsa_do_verify */
nuron_dsa_mod_exp, /* dsa_mod_exp */
nuron_mod_exp_dsa, /* bn_mod_exp */
NULL, /* init */
NULL, /* finish */
0, /* flags */
NULL, /* app_data */
NULL, /* dsa_paramgen */
NULL /* dsa_keygen */
};
# endif
# ifndef OPENSSL_NO_DH
static DH_METHOD nuron_dh = {
"Nuron DH method",
NULL,
NULL,
nuron_mod_exp_dh,
NULL,
NULL,
0,
NULL,
NULL
};
# endif
/* Constants used when creating the ENGINE */
static const char *engine_nuron_id = "nuron";
static const char *engine_nuron_name = "Nuron hardware engine support";
/*
* This internal function is used by ENGINE_nuron() and possibly by the
* "dynamic" ENGINE support too
*/
static int bind_helper(ENGINE *e)
{
# ifndef OPENSSL_NO_RSA
const RSA_METHOD *meth1;
# endif
# ifndef OPENSSL_NO_DSA
const DSA_METHOD *meth2;
# endif
# ifndef OPENSSL_NO_DH
const DH_METHOD *meth3;
# endif
if (!ENGINE_set_id(e, engine_nuron_id) ||
!ENGINE_set_name(e, engine_nuron_name) ||
# ifndef OPENSSL_NO_RSA
!ENGINE_set_RSA(e, &nuron_rsa) ||
# endif
# ifndef OPENSSL_NO_DSA
!ENGINE_set_DSA(e, &nuron_dsa) ||
# endif
# ifndef OPENSSL_NO_DH
!ENGINE_set_DH(e, &nuron_dh) ||
# endif
!ENGINE_set_destroy_function(e, nuron_destroy) ||
!ENGINE_set_init_function(e, nuron_init) ||
!ENGINE_set_finish_function(e, nuron_finish) ||
!ENGINE_set_ctrl_function(e, nuron_ctrl) ||
!ENGINE_set_cmd_defns(e, nuron_cmd_defns))
return 0;
# ifndef OPENSSL_NO_RSA
/*
* We know that the "PKCS1_SSLeay()" functions hook properly to the
* nuron-specific mod_exp and mod_exp_crt so we use those functions. NB:
* We don't use ENGINE_openssl() or anything "more generic" because
* something like the RSAref code may not hook properly, and if you own
* one of these cards then you have the right to do RSA operations on it
* anyway!
*/
meth1 = RSA_PKCS1_SSLeay();
nuron_rsa.rsa_pub_enc = meth1->rsa_pub_enc;
nuron_rsa.rsa_pub_dec = meth1->rsa_pub_dec;
nuron_rsa.rsa_priv_enc = meth1->rsa_priv_enc;
nuron_rsa.rsa_priv_dec = meth1->rsa_priv_dec;
# endif
# ifndef OPENSSL_NO_DSA
/*
* Use the DSA_OpenSSL() method and just hook the mod_exp-ish bits.
*/
meth2 = DSA_OpenSSL();
nuron_dsa.dsa_do_sign = meth2->dsa_do_sign;
nuron_dsa.dsa_sign_setup = meth2->dsa_sign_setup;
nuron_dsa.dsa_do_verify = meth2->dsa_do_verify;
# endif
# ifndef OPENSSL_NO_DH
/* Much the same for Diffie-Hellman */
meth3 = DH_OpenSSL();
nuron_dh.generate_key = meth3->generate_key;
nuron_dh.compute_key = meth3->compute_key;
# endif
/* Ensure the nuron error handling is set up */
ERR_load_NURON_strings();
return 1;
}
# ifdef OPENSSL_NO_DYNAMIC_ENGINE
static ENGINE *engine_nuron(void)
{
ENGINE *ret = ENGINE_new();
if (!ret)
return NULL;
if (!bind_helper(ret)) {
ENGINE_free(ret);
return NULL;
}
return ret;
}
void ENGINE_load_nuron(void)
{
/* Copied from eng_[openssl|dyn].c */
ENGINE *toadd = engine_nuron();
if (!toadd)
return;
ENGINE_add(toadd);
ENGINE_free(toadd);
ERR_clear_error();
}
# endif
/*
* This stuff is needed if this ENGINE is being compiled into a
* self-contained shared-library.
*/
# ifndef OPENSSL_NO_DYNAMIC_ENGINE
static int bind_fn(ENGINE *e, const char *id)
{
if (id && (strcmp(id, engine_nuron_id) != 0))
return 0;
if (!bind_helper(e))
return 0;
return 1;
}
IMPLEMENT_DYNAMIC_CHECK_FN()
IMPLEMENT_DYNAMIC_BIND_FN(bind_fn)
# endif /* OPENSSL_NO_DYNAMIC_ENGINE */
# endif /* !OPENSSL_NO_HW_NURON */
#endif /* !OPENSSL_NO_HW */
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