/* crypto/engine/hw_atalla.c */
/*
* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL project
* 2000.
*/
/* ====================================================================
* 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).
*
*/
#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_ATALLA
# ifdef FLAT_INC
# include "atalla.h"
# else
# include "vendor_defns/atalla.h"
# endif
# define ATALLA_LIB_NAME "atalla engine"
# include "e_atalla_err.c"
static int atalla_destroy(ENGINE *e);
static int atalla_init(ENGINE *e);
static int atalla_finish(ENGINE *e);
static int atalla_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f) (void));
/* BIGNUM stuff */
static int atalla_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx);
# ifndef OPENSSL_NO_RSA
/* RSA stuff */
static int atalla_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa,
BN_CTX *ctx);
/* This function is aliased to mod_exp (with the mont stuff dropped). */
static int atalla_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx,
BN_MONT_CTX *m_ctx);
# endif
# ifndef OPENSSL_NO_DSA
/* DSA stuff */
static int atalla_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);
static int atalla_mod_exp_dsa(DSA *dsa, BIGNUM *r, BIGNUM *a,
const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
BN_MONT_CTX *m_ctx);
# endif
# ifndef OPENSSL_NO_DH
/* DH stuff */
/* This function is alised to mod_exp (with the DH and mont dropped). */
static int atalla_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);
# endif
/* The definitions for control commands specific to this engine */
# define ATALLA_CMD_SO_PATH ENGINE_CMD_BASE
static const ENGINE_CMD_DEFN atalla_cmd_defns[] = {
{ATALLA_CMD_SO_PATH,
"SO_PATH",
"Specifies the path to the 'atasi' shared library",
ENGINE_CMD_FLAG_STRING},
{0, NULL, NULL, 0}
};
# ifndef OPENSSL_NO_RSA
/* Our internal RSA_METHOD that we provide pointers to */
static RSA_METHOD atalla_rsa = {
"Atalla RSA method",
NULL,
NULL,
NULL,
NULL,
atalla_rsa_mod_exp,
atalla_mod_exp_mont,
NULL,
NULL,
0,
NULL,
NULL,
NULL,
NULL
};
# endif
# ifndef OPENSSL_NO_DSA
/* Our internal DSA_METHOD that we provide pointers to */
static DSA_METHOD atalla_dsa = {
"Atalla DSA method",
NULL, /* dsa_do_sign */
NULL, /* dsa_sign_setup */
NULL, /* dsa_do_verify */
atalla_dsa_mod_exp, /* dsa_mod_exp */
atalla_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
/* Our internal DH_METHOD that we provide pointers to */
static DH_METHOD atalla_dh = {
"Atalla DH method",
NULL,
NULL,
atalla_mod_exp_dh,
NULL,
NULL,
0,
NULL,
NULL
};
# endif
/* Constants used when creating the ENGINE */
static const char *engine_atalla_id = "atalla";
static const char *engine_atalla_name = "Atalla hardware engine support";
/*
* This internal function is used by ENGINE_atalla() 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_atalla_id) ||
!ENGINE_set_name(e, engine_atalla_name) ||
# ifndef OPENSSL_NO_RSA
!ENGINE_set_RSA(e, &atalla_rsa) ||
# endif
# ifndef OPENSSL_NO_DSA
!ENGINE_set_DSA(e, &atalla_dsa) ||
# endif
# ifndef OPENSSL_NO_DH
!ENGINE_set_DH(e, &atalla_dh) ||
# endif
!ENGINE_set_destroy_function(e, atalla_destroy) ||
!ENGINE_set_init_function(e, atalla_init) ||
!ENGINE_set_finish_function(e, atalla_finish) ||
!ENGINE_set_ctrl_function(e, atalla_ctrl) ||
!ENGINE_set_cmd_defns(e, atalla_cmd_defns))
return 0;
# ifndef OPENSSL_NO_RSA
/*
* We know that the "PKCS1_SSLeay()" functions hook properly to the
* atalla-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();
atalla_rsa.rsa_pub_enc = meth1->rsa_pub_enc;
atalla_rsa.rsa_pub_dec = meth1->rsa_pub_dec;
atalla_rsa.rsa_priv_enc = meth1->rsa_priv_enc;
atalla_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();
atalla_dsa.dsa_do_sign = meth2->dsa_do_sign;
atalla_dsa.dsa_sign_setup = meth2->dsa_sign_setup;
atalla_dsa.dsa_do_verify = meth2->dsa_do_verify;
# endif
# ifndef OPENSSL_NO_DH
/* Much the same for Diffie-Hellman */
meth3 = DH_OpenSSL();
atalla_dh.generate_key = meth3->generate_key;
atalla_dh.compute_key = meth3->compute_key;
# endif
/* Ensure the atalla error handling is set up */
ERR_load_ATALLA_strings();
return 1;
}
# ifdef OPENSSL_NO_DYNAMIC_ENGINE
static ENGINE *engine_atalla(void)
{
ENGINE *ret = ENGINE_new();
if (!ret)
return NULL;
if (!bind_helper(ret)) {
ENGINE_free(ret);
return NULL;
}
return ret;
}
void ENGINE_load_atalla(void)
{
/* Copied from eng_[openssl|dyn].c */
ENGINE *toadd = engine_atalla();
if (!toadd)
return;
ENGINE_add(toadd);
ENGINE_free(toadd);
ERR_clear_error();
}
# endif
/*
* This is a process-global DSO handle used for loading and unloading the
* Atalla library. NB: This is only set (or unset) during an init() or
* finish() call (reference counts permitting) and they're operating with
* global locks, so this should be thread-safe implicitly.
*/
static DSO *atalla_dso = NULL;
/*
* These are the function pointers that are (un)set when the library has
* successfully (un)loaded.
*/
static tfnASI_GetHardwareConfig *p_Atalla_GetHardwareConfig = NULL;
static tfnASI_RSAPrivateKeyOpFn *p_Atalla_RSAPrivateKeyOpFn = NULL;
static tfnASI_GetPerformanceStatistics *p_Atalla_GetPerformanceStatistics =
NULL;
/*
* These are the static string constants for the DSO file name and the
* function symbol names to bind to. Regrettably, the DSO name on *nix
* appears to be "atasi.so" rather than something more consistent like
* "libatasi.so". At the time of writing, I'm not sure what the file name on
* win32 is but clearly native name translation is not possible (eg
* libatasi.so on *nix, and atasi.dll on win32). For the purposes of testing,
* I have created a symbollic link called "libatasi.so" so that we can use
* native name-translation - a better solution will be needed.
*/
static const char *ATALLA_LIBNAME = NULL;
static const char *get_ATALLA_LIBNAME(void)
{
if (ATALLA_LIBNAME)
return ATALLA_LIBNAME;
return "atasi";
}
static void free_ATALLA_LIBNAME(void)
{
if (ATALLA_LIBNAME)
OPENSSL_free((void *)ATALLA_LIBNAME);
ATALLA_LIBNAME = NULL;
}
static long set_ATALLA_LIBNAME(const char *name)
{
free_ATALLA_LIBNAME();
return (((ATALLA_LIBNAME = BUF_strdup(name)) != NULL) ? 1 : 0);
}
static const char *ATALLA_F1 = "ASI_GetHardwareConfig";
static const char *ATALLA_F2 = "ASI_RSAPrivateKeyOpFn";
static const char *ATALLA_F3 = "ASI_GetPerformanceStatistics";
/* Destructor (complements the "ENGINE_atalla()" constructor) */
static int atalla_destroy(ENGINE *e)
{
free_ATALLA_LIBNAME();
/*
* Unload the atalla error strings so any error state including our
* functs or reasons won't lead to a segfault (they simply get displayed
* without corresponding string data because none will be found).
*/
ERR_unload_ATALLA_strings();
return 1;
}
/* (de)initialisation functions. */
static int atalla_init(ENGINE *e)
{
tfnASI_GetHardwareConfig *p1;
tfnASI_RSAPrivateKeyOpFn *p2;
tfnASI_GetPerformanceStatistics *p3;
/*
* Not sure of the origin of this magic value, but Ben's code had it and
* it seemed to have been working for a few people. :-)
*/
unsigned int config_buf[1024];
if (atalla_dso != NULL) {
ATALLAerr(ATALLA_F_ATALLA_INIT, ATALLA_R_ALREADY_LOADED);
goto err;
}
/*
* Attempt to load libatasi.so/atasi.dll/whatever. Needs to be changed
* unfortunately because the Atalla drivers don't have standard library
* names that can be platform-translated well.
*/
/*
* TODO: Work out how to actually map to the names the Atalla drivers
* really use - for now a symbollic link needs to be created on the host
* system from libatasi.so to atasi.so on unix variants.
*/
atalla_dso = DSO_load(NULL, get_ATALLA_LIBNAME(), NULL, 0);
if (atalla_dso == NULL) {
ATALLAerr(ATALLA_F_ATALLA_INIT, ATALLA_R_NOT_LOADED);
goto err;
}
if (!
(p1 =
(tfnASI_GetHardwareConfig *) DSO_bind_func(atalla_dso, ATALLA_F1))
|| !(p2 = (tfnASI_RSAPrivateKeyOpFn *) DSO_bind_func(atalla_dso, ATALLA_F2))
|| !(p3 =
(tfnASI_GetPerformanceStatistics *) DSO_bind_func(atalla_dso,
ATALLA_F3))) {
ATALLAerr(ATALLA_F_ATALLA_INIT, ATALLA_R_NOT_LOADED);
goto err;
}
/* Copy the pointers */
p_Atalla_GetHardwareConfig = p1;
p_Atalla_RSAPrivateKeyOpFn = p2;
p_Atalla_GetPerformanceStatistics = p3;
/*
* Perform a basic test to see if there's actually any unit running.
*/
if (p1(0L, config_buf) != 0) {
ATALLAerr(ATALLA_F_ATALLA_INIT, ATALLA_R_UNIT_FAILURE);
goto err;
}
/* Everything's fine. */
return 1;
err:
if (atalla_dso)
DSO_free(atalla_dso);
atalla_dso = NULL;
p_Atalla_GetHardwareConfig = NULL;
p_Atalla_RSAPrivateKeyOpFn = NULL;
p_Atalla_GetPerformanceStatistics = NULL;
return 0;
}
static int atalla_finish(ENGINE *e)
{
free_ATALLA_LIBNAME();
if (atalla_dso == NULL) {
ATALLAerr(ATALLA_F_ATALLA_FINISH, ATALLA_R_NOT_LOADED);
return 0;
}
if (!DSO_free(atalla_dso)) {
ATALLAerr(ATALLA_F_ATALLA_FINISH, ATALLA_R_UNIT_FAILURE);
return 0;
}
atalla_dso = NULL;
p_Atalla_GetHardwareConfig = NULL;
p_Atalla_RSAPrivateKeyOpFn = NULL;
p_Atalla_GetPerformanceStatistics = NULL;
return 1;
}
static int atalla_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f) (void))
{
int initialised = ((atalla_dso == NULL) ? 0 : 1);
switch (cmd) {
case ATALLA_CMD_SO_PATH:
if (p == NULL) {
ATALLAerr(ATALLA_F_ATALLA_CTRL, ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
if (initialised) {
ATALLAerr(ATALLA_F_ATALLA_CTRL, ATALLA_R_ALREADY_LOADED);
return 0;
}
return set_ATALLA_LIBNAME((const char *)p);
default:
break;
}
ATALLAerr(ATALLA_F_ATALLA_CTRL, ATALLA_R_CTRL_COMMAND_NOT_IMPLEMENTED);
return 0;
}
static int atalla_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx)
{
/*
* I need somewhere to store temporary serialised values for use with the
* Atalla API calls. A neat cheat - I'll use BIGNUMs from the BN_CTX but
* access their arrays directly as byte arrays <grin>. This way I don't
* have to clean anything up.
*/
BIGNUM *modulus;
BIGNUM *exponent;
BIGNUM *argument;
BIGNUM *result;
RSAPrivateKey keydata;
int to_return, numbytes;
modulus = exponent = argument = result = NULL;
to_return = 0; /* expect failure */
if (!atalla_dso) {
ATALLAerr(ATALLA_F_ATALLA_MOD_EXP, ATALLA_R_NOT_LOADED);
goto err;
}
/* Prepare the params */
BN_CTX_start(ctx);
modulus = BN_CTX_get(ctx);
exponent = BN_CTX_get(ctx);
argument = BN_CTX_get(ctx);
result = BN_CTX_get(ctx);
if (!result) {
ATALLAerr(ATALLA_F_ATALLA_MOD_EXP, ATALLA_R_BN_CTX_FULL);
goto err;
}
if (!bn_wexpand(modulus, m->top) || !bn_wexpand(exponent, m->top) ||
!bn_wexpand(argument, m->top) || !bn_wexpand(result, m->top)) {
ATALLAerr(ATALLA_F_ATALLA_MOD_EXP, ATALLA_R_BN_EXPAND_FAIL);
goto err;
}
/* Prepare the key-data */
memset(&keydata, 0, sizeof keydata);
numbytes = BN_num_bytes(m);
memset(exponent->d, 0, numbytes);
memset(modulus->d, 0, numbytes);
BN_bn2bin(p, (unsigned char *)exponent->d + numbytes - BN_num_bytes(p));
BN_bn2bin(m, (unsigned char *)modulus->d + numbytes - BN_num_bytes(m));
keydata.privateExponent.data = (unsigned char *)exponent->d;
keydata.privateExponent.len = numbytes;
keydata.modulus.data = (unsigned char *)modulus->d;
keydata.modulus.len = numbytes;
/* Prepare the argument */
memset(argument->d, 0, numbytes);
memset(result->d, 0, numbytes);
BN_bn2bin(a, (unsigned char *)argument->d + numbytes - BN_num_bytes(a));
/* Perform the operation */
if (p_Atalla_RSAPrivateKeyOpFn(&keydata, (unsigned char *)result->d,
(unsigned char *)argument->d,
keydata.modulus.len) != 0) {
ATALLAerr(ATALLA_F_ATALLA_MOD_EXP, ATALLA_R_REQUEST_FAILED);
goto err;
}
/* Convert the response */
BN_bin2bn((unsigned char *)result->d, numbytes, r);
to_return = 1;
err:
BN_CTX_end(ctx);
return to_return;
}
# ifndef OPENSSL_NO_RSA
static int atalla_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa,
BN_CTX *ctx)
{
int to_return = 0;
if (!atalla_dso) {
ATALLAerr(ATALLA_F_ATALLA_RSA_MOD_EXP, ATALLA_R_NOT_LOADED);
goto err;
}
if (!rsa->d || !rsa->n) {
ATALLAerr(ATALLA_F_ATALLA_RSA_MOD_EXP,
ATALLA_R_MISSING_KEY_COMPONENTS);
goto err;
}
to_return = atalla_mod_exp(r0, I, rsa->d, rsa->n, ctx);
err:
return to_return;
}
# 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 atalla_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 (!atalla_mod_exp(rr, a1, p1, m, ctx))
goto end;
/* let t = a2 ^ p2 mod m */
if (!atalla_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 atalla_mod_exp_dsa(DSA *dsa, BIGNUM *r, BIGNUM *a,
const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
BN_MONT_CTX *m_ctx)
{
return atalla_mod_exp(r, a, p, m, ctx);
}
# endif
# ifndef OPENSSL_NO_RSA
/* This function is aliased to mod_exp (with the mont stuff dropped). */
static int atalla_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx,
BN_MONT_CTX *m_ctx)
{
return atalla_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 atalla_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 atalla_mod_exp(r, a, p, m, ctx);
}
# 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_atalla_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_ATALLA */
#endif /* !OPENSSL_NO_HW */