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openssl/engines/e_ubsec.c
Edgar Pek bcfa19a8d1 Fix null-pointer dereference 
Signed-off-by: Kurt Roeckx <kurt@roeckx.be>
Reviewed-by: Richard Levitte <levitte@openssl.org>
2015-02-22 13:20:10 +01:00

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/* crypto/engine/hw_ubsec.c */
/*
* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL project
* 2000. Cloned shamelessly by Joe Tardo.
*/
/* ====================================================================
* 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_UBSEC
# ifdef FLAT_INC
# include "hw_ubsec.h"
# else
# include "vendor_defns/hw_ubsec.h"
# endif
# define UBSEC_LIB_NAME "ubsec engine"
# include "e_ubsec_err.c"
# define FAIL_TO_SOFTWARE -15
static int ubsec_destroy(ENGINE *e);
static int ubsec_init(ENGINE *e);
static int ubsec_finish(ENGINE *e);
static int ubsec_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f) (void));
static int ubsec_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx);
# ifndef OPENSSL_NO_RSA
static int ubsec_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
const BIGNUM *q, const BIGNUM *dp,
const BIGNUM *dq, const BIGNUM *qinv,
BN_CTX *ctx);
static int ubsec_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa,
BN_CTX *ctx);
static int ubsec_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
# ifdef NOT_USED
static int ubsec_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 ubsec_mod_exp_dsa(DSA *dsa, BIGNUM *r, BIGNUM *a,
const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
BN_MONT_CTX *m_ctx);
# endif
static DSA_SIG *ubsec_dsa_do_sign(const unsigned char *dgst, int dlen,
DSA *dsa);
static int ubsec_dsa_verify(const unsigned char *dgst, int dgst_len,
DSA_SIG *sig, DSA *dsa);
# endif
# ifndef OPENSSL_NO_DH
static int ubsec_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);
static int ubsec_dh_compute_key(unsigned char *key, const BIGNUM *pub_key,
DH *dh);
static int ubsec_dh_generate_key(DH *dh);
# endif
# ifdef NOT_USED
static int ubsec_rand_bytes(unsigned char *buf, int num);
static int ubsec_rand_status(void);
# endif
# define UBSEC_CMD_SO_PATH ENGINE_CMD_BASE
static const ENGINE_CMD_DEFN ubsec_cmd_defns[] = {
{UBSEC_CMD_SO_PATH,
"SO_PATH",
"Specifies the path to the 'ubsec' 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 ubsec_rsa = {
"UBSEC RSA method",
NULL,
NULL,
NULL,
NULL,
ubsec_rsa_mod_exp,
ubsec_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 ubsec_dsa = {
"UBSEC DSA method",
ubsec_dsa_do_sign, /* dsa_do_sign */
NULL, /* dsa_sign_setup */
ubsec_dsa_verify, /* dsa_do_verify */
NULL, /* ubsec_dsa_mod_exp *//* dsa_mod_exp */
NULL, /* ubsec_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 ubsec_dh = {
"UBSEC DH method",
ubsec_dh_generate_key,
ubsec_dh_compute_key,
ubsec_mod_exp_dh,
NULL,
NULL,
0,
NULL,
NULL
};
# endif
/* Constants used when creating the ENGINE */
static const char *engine_ubsec_id = "ubsec";
static const char *engine_ubsec_name = "UBSEC hardware engine support";
/*
* This internal function is used by ENGINE_ubsec() 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_DH
# ifndef HAVE_UBSEC_DH
const DH_METHOD *meth3;
# endif /* HAVE_UBSEC_DH */
# endif
if (!ENGINE_set_id(e, engine_ubsec_id) ||
!ENGINE_set_name(e, engine_ubsec_name) ||
# ifndef OPENSSL_NO_RSA
!ENGINE_set_RSA(e, &ubsec_rsa) ||
# endif
# ifndef OPENSSL_NO_DSA
!ENGINE_set_DSA(e, &ubsec_dsa) ||
# endif
# ifndef OPENSSL_NO_DH
!ENGINE_set_DH(e, &ubsec_dh) ||
# endif
!ENGINE_set_destroy_function(e, ubsec_destroy) ||
!ENGINE_set_init_function(e, ubsec_init) ||
!ENGINE_set_finish_function(e, ubsec_finish) ||
!ENGINE_set_ctrl_function(e, ubsec_ctrl) ||
!ENGINE_set_cmd_defns(e, ubsec_cmd_defns))
return 0;
# ifndef OPENSSL_NO_RSA
/*
* We know that the "PKCS1_SSLeay()" functions hook properly to the
* Broadcom-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();
ubsec_rsa.rsa_pub_enc = meth1->rsa_pub_enc;
ubsec_rsa.rsa_pub_dec = meth1->rsa_pub_dec;
ubsec_rsa.rsa_priv_enc = meth1->rsa_priv_enc;
ubsec_rsa.rsa_priv_dec = meth1->rsa_priv_dec;
# endif
# ifndef OPENSSL_NO_DH
# ifndef HAVE_UBSEC_DH
/* Much the same for Diffie-Hellman */
meth3 = DH_OpenSSL();
ubsec_dh.generate_key = meth3->generate_key;
ubsec_dh.compute_key = meth3->compute_key;
# endif /* HAVE_UBSEC_DH */
# endif
/* Ensure the ubsec error handling is set up */
ERR_load_UBSEC_strings();
return 1;
}
# ifdef OPENSSL_NO_DYNAMIC_ENGINE
static ENGINE *engine_ubsec(void)
{
ENGINE *ret = ENGINE_new();
if (!ret)
return NULL;
if (!bind_helper(ret)) {
ENGINE_free(ret);
return NULL;
}
return ret;
}
void ENGINE_load_ubsec(void)
{
/* Copied from eng_[openssl|dyn].c */
ENGINE *toadd = engine_ubsec();
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
* UBSEC 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 *ubsec_dso = NULL;
/*
* These are the function pointers that are (un)set when the library has
* successfully (un)loaded.
*/
static t_UBSEC_ubsec_bytes_to_bits *p_UBSEC_ubsec_bytes_to_bits = NULL;
static t_UBSEC_ubsec_bits_to_bytes *p_UBSEC_ubsec_bits_to_bytes = NULL;
static t_UBSEC_ubsec_open *p_UBSEC_ubsec_open = NULL;
static t_UBSEC_ubsec_close *p_UBSEC_ubsec_close = NULL;
# ifndef OPENSSL_NO_DH
static t_UBSEC_diffie_hellman_generate_ioctl
* p_UBSEC_diffie_hellman_generate_ioctl = NULL;
static t_UBSEC_diffie_hellman_agree_ioctl *p_UBSEC_diffie_hellman_agree_ioctl
= NULL;
# endif
# ifndef OPENSSL_NO_RSA
static t_UBSEC_rsa_mod_exp_ioctl *p_UBSEC_rsa_mod_exp_ioctl = NULL;
static t_UBSEC_rsa_mod_exp_crt_ioctl *p_UBSEC_rsa_mod_exp_crt_ioctl = NULL;
# endif
# ifndef OPENSSL_NO_DSA
static t_UBSEC_dsa_sign_ioctl *p_UBSEC_dsa_sign_ioctl = NULL;
static t_UBSEC_dsa_verify_ioctl *p_UBSEC_dsa_verify_ioctl = NULL;
# endif
static t_UBSEC_math_accelerate_ioctl *p_UBSEC_math_accelerate_ioctl = NULL;
static t_UBSEC_rng_ioctl *p_UBSEC_rng_ioctl = NULL;
static t_UBSEC_max_key_len_ioctl *p_UBSEC_max_key_len_ioctl = NULL;
static int max_key_len = 1024; /* ??? */
/*
* These are the static string constants for the DSO file name and the function
* symbol names to bind to.
*/
static const char *UBSEC_LIBNAME = NULL;
static const char *get_UBSEC_LIBNAME(void)
{
if (UBSEC_LIBNAME)
return UBSEC_LIBNAME;
return "ubsec";
}
static void free_UBSEC_LIBNAME(void)
{
if (UBSEC_LIBNAME)
OPENSSL_free((void *)UBSEC_LIBNAME);
UBSEC_LIBNAME = NULL;
}
static long set_UBSEC_LIBNAME(const char *name)
{
free_UBSEC_LIBNAME();
return (((UBSEC_LIBNAME = BUF_strdup(name)) != NULL) ? 1 : 0);
}
static const char *UBSEC_F1 = "ubsec_bytes_to_bits";
static const char *UBSEC_F2 = "ubsec_bits_to_bytes";
static const char *UBSEC_F3 = "ubsec_open";
static const char *UBSEC_F4 = "ubsec_close";
# ifndef OPENSSL_NO_DH
static const char *UBSEC_F5 = "diffie_hellman_generate_ioctl";
static const char *UBSEC_F6 = "diffie_hellman_agree_ioctl";
# endif
/* #ifndef OPENSSL_NO_RSA */
static const char *UBSEC_F7 = "rsa_mod_exp_ioctl";
static const char *UBSEC_F8 = "rsa_mod_exp_crt_ioctl";
/* #endif */
# ifndef OPENSSL_NO_DSA
static const char *UBSEC_F9 = "dsa_sign_ioctl";
static const char *UBSEC_F10 = "dsa_verify_ioctl";
# endif
static const char *UBSEC_F11 = "math_accelerate_ioctl";
static const char *UBSEC_F12 = "rng_ioctl";
static const char *UBSEC_F13 = "ubsec_max_key_len_ioctl";
/* Destructor (complements the "ENGINE_ubsec()" constructor) */
static int ubsec_destroy(ENGINE *e)
{
free_UBSEC_LIBNAME();
ERR_unload_UBSEC_strings();
return 1;
}
/* (de)initialisation functions. */
static int ubsec_init(ENGINE *e)
{
t_UBSEC_ubsec_bytes_to_bits *p1;
t_UBSEC_ubsec_bits_to_bytes *p2;
t_UBSEC_ubsec_open *p3;
t_UBSEC_ubsec_close *p4;
# ifndef OPENSSL_NO_DH
t_UBSEC_diffie_hellman_generate_ioctl *p5;
t_UBSEC_diffie_hellman_agree_ioctl *p6;
# endif
/* #ifndef OPENSSL_NO_RSA */
t_UBSEC_rsa_mod_exp_ioctl *p7;
t_UBSEC_rsa_mod_exp_crt_ioctl *p8;
/* #endif */
# ifndef OPENSSL_NO_DSA
t_UBSEC_dsa_sign_ioctl *p9;
t_UBSEC_dsa_verify_ioctl *p10;
# endif
t_UBSEC_math_accelerate_ioctl *p11;
t_UBSEC_rng_ioctl *p12;
t_UBSEC_max_key_len_ioctl *p13;
int fd = 0;
if (ubsec_dso != NULL) {
UBSECerr(UBSEC_F_UBSEC_INIT, UBSEC_R_ALREADY_LOADED);
goto err;
}
/*
* Attempt to load libubsec.so/ubsec.dll/whatever.
*/
ubsec_dso = DSO_load(NULL, get_UBSEC_LIBNAME(), NULL, 0);
if (ubsec_dso == NULL) {
UBSECerr(UBSEC_F_UBSEC_INIT, UBSEC_R_DSO_FAILURE);
goto err;
}
if (!(p1 = (t_UBSEC_ubsec_bytes_to_bits *)
DSO_bind_func(ubsec_dso, UBSEC_F1))
|| !(p2 = (t_UBSEC_ubsec_bits_to_bytes *)
DSO_bind_func(ubsec_dso, UBSEC_F2))
|| !(p3 = (t_UBSEC_ubsec_open *)
DSO_bind_func(ubsec_dso, UBSEC_F3))
|| !(p4 = (t_UBSEC_ubsec_close *)
DSO_bind_func(ubsec_dso, UBSEC_F4))
# ifndef OPENSSL_NO_DH
|| !(p5 = (t_UBSEC_diffie_hellman_generate_ioctl *)
DSO_bind_func(ubsec_dso, UBSEC_F5))
|| !(p6 = (t_UBSEC_diffie_hellman_agree_ioctl *)
DSO_bind_func(ubsec_dso, UBSEC_F6))
# endif
/* #ifndef OPENSSL_NO_RSA */
|| !(p7 = (t_UBSEC_rsa_mod_exp_ioctl *)
DSO_bind_func(ubsec_dso, UBSEC_F7))
|| !(p8 = (t_UBSEC_rsa_mod_exp_crt_ioctl *)
DSO_bind_func(ubsec_dso, UBSEC_F8))
/* #endif */
# ifndef OPENSSL_NO_DSA
|| !(p9 = (t_UBSEC_dsa_sign_ioctl *)
DSO_bind_func(ubsec_dso, UBSEC_F9))
|| !(p10 = (t_UBSEC_dsa_verify_ioctl *)
DSO_bind_func(ubsec_dso, UBSEC_F10))
# endif
|| !(p11 = (t_UBSEC_math_accelerate_ioctl *)
DSO_bind_func(ubsec_dso, UBSEC_F11))
|| !(p12 = (t_UBSEC_rng_ioctl *)
DSO_bind_func(ubsec_dso, UBSEC_F12))
|| !(p13 = (t_UBSEC_max_key_len_ioctl *)
DSO_bind_func(ubsec_dso, UBSEC_F13))) {
UBSECerr(UBSEC_F_UBSEC_INIT, UBSEC_R_DSO_FAILURE);
goto err;
}
/* Copy the pointers */
p_UBSEC_ubsec_bytes_to_bits = p1;
p_UBSEC_ubsec_bits_to_bytes = p2;
p_UBSEC_ubsec_open = p3;
p_UBSEC_ubsec_close = p4;
# ifndef OPENSSL_NO_DH
p_UBSEC_diffie_hellman_generate_ioctl = p5;
p_UBSEC_diffie_hellman_agree_ioctl = p6;
# endif
# ifndef OPENSSL_NO_RSA
p_UBSEC_rsa_mod_exp_ioctl = p7;
p_UBSEC_rsa_mod_exp_crt_ioctl = p8;
# endif
# ifndef OPENSSL_NO_DSA
p_UBSEC_dsa_sign_ioctl = p9;
p_UBSEC_dsa_verify_ioctl = p10;
# endif
p_UBSEC_math_accelerate_ioctl = p11;
p_UBSEC_rng_ioctl = p12;
p_UBSEC_max_key_len_ioctl = p13;
/* Perform an open to see if there's actually any unit running. */
if (((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) > 0)
&& (p_UBSEC_max_key_len_ioctl(fd, &max_key_len) == 0)) {
p_UBSEC_ubsec_close(fd);
return 1;
} else {
UBSECerr(UBSEC_F_UBSEC_INIT, UBSEC_R_UNIT_FAILURE);
}
err:
if (ubsec_dso)
DSO_free(ubsec_dso);
ubsec_dso = NULL;
p_UBSEC_ubsec_bytes_to_bits = NULL;
p_UBSEC_ubsec_bits_to_bytes = NULL;
p_UBSEC_ubsec_open = NULL;
p_UBSEC_ubsec_close = NULL;
# ifndef OPENSSL_NO_DH
p_UBSEC_diffie_hellman_generate_ioctl = NULL;
p_UBSEC_diffie_hellman_agree_ioctl = NULL;
# endif
# ifndef OPENSSL_NO_RSA
p_UBSEC_rsa_mod_exp_ioctl = NULL;
p_UBSEC_rsa_mod_exp_crt_ioctl = NULL;
# endif
# ifndef OPENSSL_NO_DSA
p_UBSEC_dsa_sign_ioctl = NULL;
p_UBSEC_dsa_verify_ioctl = NULL;
# endif
p_UBSEC_math_accelerate_ioctl = NULL;
p_UBSEC_rng_ioctl = NULL;
p_UBSEC_max_key_len_ioctl = NULL;
return 0;
}
static int ubsec_finish(ENGINE *e)
{
free_UBSEC_LIBNAME();
if (ubsec_dso == NULL) {
UBSECerr(UBSEC_F_UBSEC_FINISH, UBSEC_R_NOT_LOADED);
return 0;
}
if (!DSO_free(ubsec_dso)) {
UBSECerr(UBSEC_F_UBSEC_FINISH, UBSEC_R_DSO_FAILURE);
return 0;
}
ubsec_dso = NULL;
p_UBSEC_ubsec_bytes_to_bits = NULL;
p_UBSEC_ubsec_bits_to_bytes = NULL;
p_UBSEC_ubsec_open = NULL;
p_UBSEC_ubsec_close = NULL;
# ifndef OPENSSL_NO_DH
p_UBSEC_diffie_hellman_generate_ioctl = NULL;
p_UBSEC_diffie_hellman_agree_ioctl = NULL;
# endif
# ifndef OPENSSL_NO_RSA
p_UBSEC_rsa_mod_exp_ioctl = NULL;
p_UBSEC_rsa_mod_exp_crt_ioctl = NULL;
# endif
# ifndef OPENSSL_NO_DSA
p_UBSEC_dsa_sign_ioctl = NULL;
p_UBSEC_dsa_verify_ioctl = NULL;
# endif
p_UBSEC_math_accelerate_ioctl = NULL;
p_UBSEC_rng_ioctl = NULL;
p_UBSEC_max_key_len_ioctl = NULL;
return 1;
}
static int ubsec_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f) (void))
{
int initialised = ((ubsec_dso == NULL) ? 0 : 1);
switch (cmd) {
case UBSEC_CMD_SO_PATH:
if (p == NULL) {
UBSECerr(UBSEC_F_UBSEC_CTRL, ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
if (initialised) {
UBSECerr(UBSEC_F_UBSEC_CTRL, UBSEC_R_ALREADY_LOADED);
return 0;
}
return set_UBSEC_LIBNAME((const char *)p);
default:
break;
}
UBSECerr(UBSEC_F_UBSEC_CTRL, UBSEC_R_CTRL_COMMAND_NOT_IMPLEMENTED);
return 0;
}
static int ubsec_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx)
{
int y_len = 0;
int fd;
if (ubsec_dso == NULL) {
UBSECerr(UBSEC_F_UBSEC_MOD_EXP, UBSEC_R_NOT_LOADED);
return 0;
}
/* Check if hardware can't handle this argument. */
y_len = BN_num_bits(m);
if (y_len > max_key_len) {
UBSECerr(UBSEC_F_UBSEC_MOD_EXP, UBSEC_R_SIZE_TOO_LARGE_OR_TOO_SMALL);
return BN_mod_exp(r, a, p, m, ctx);
}
if (!bn_wexpand(r, m->top)) {
UBSECerr(UBSEC_F_UBSEC_MOD_EXP, UBSEC_R_BN_EXPAND_FAIL);
return 0;
}
if ((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) <= 0) {
fd = 0;
UBSECerr(UBSEC_F_UBSEC_MOD_EXP, UBSEC_R_UNIT_FAILURE);
return BN_mod_exp(r, a, p, m, ctx);
}
if (p_UBSEC_rsa_mod_exp_ioctl(fd, (unsigned char *)a->d, BN_num_bits(a),
(unsigned char *)m->d, BN_num_bits(m),
(unsigned char *)p->d, BN_num_bits(p),
(unsigned char *)r->d, &y_len) != 0) {
UBSECerr(UBSEC_F_UBSEC_MOD_EXP, UBSEC_R_REQUEST_FAILED);
p_UBSEC_ubsec_close(fd);
return BN_mod_exp(r, a, p, m, ctx);
}
p_UBSEC_ubsec_close(fd);
r->top = (BN_num_bits(m) + BN_BITS2 - 1) / BN_BITS2;
return 1;
}
# ifndef OPENSSL_NO_RSA
static int ubsec_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa,
BN_CTX *ctx)
{
int to_return = 0;
if (!rsa->p || !rsa->q || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp) {
UBSECerr(UBSEC_F_UBSEC_RSA_MOD_EXP, UBSEC_R_MISSING_KEY_COMPONENTS);
goto err;
}
to_return = ubsec_mod_exp_crt(r0, I, rsa->p, rsa->q, rsa->dmp1,
rsa->dmq1, rsa->iqmp, ctx);
if (to_return == FAIL_TO_SOFTWARE) {
/*
* Do in software as hardware failed.
*/
const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
to_return = (*meth->rsa_mod_exp) (r0, I, rsa, ctx);
}
err:
return to_return;
}
static int ubsec_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
const BIGNUM *q, const BIGNUM *dp,
const BIGNUM *dq, const BIGNUM *qinv,
BN_CTX *ctx)
{
int y_len, fd;
y_len = BN_num_bits(p) + BN_num_bits(q);
/* Check if hardware can't handle this argument. */
if (y_len > max_key_len) {
UBSECerr(UBSEC_F_UBSEC_MOD_EXP_CRT,
UBSEC_R_SIZE_TOO_LARGE_OR_TOO_SMALL);
return FAIL_TO_SOFTWARE;
}
if (!bn_wexpand(r, p->top + q->top + 1)) {
UBSECerr(UBSEC_F_UBSEC_MOD_EXP_CRT, UBSEC_R_BN_EXPAND_FAIL);
return 0;
}
if ((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) <= 0) {
fd = 0;
UBSECerr(UBSEC_F_UBSEC_MOD_EXP_CRT, UBSEC_R_UNIT_FAILURE);
return FAIL_TO_SOFTWARE;
}
if (p_UBSEC_rsa_mod_exp_crt_ioctl(fd,
(unsigned char *)a->d, BN_num_bits(a),
(unsigned char *)qinv->d,
BN_num_bits(qinv),
(unsigned char *)dp->d, BN_num_bits(dp),
(unsigned char *)p->d, BN_num_bits(p),
(unsigned char *)dq->d, BN_num_bits(dq),
(unsigned char *)q->d, BN_num_bits(q),
(unsigned char *)r->d, &y_len) != 0) {
UBSECerr(UBSEC_F_UBSEC_MOD_EXP_CRT, UBSEC_R_REQUEST_FAILED);
p_UBSEC_ubsec_close(fd);
return FAIL_TO_SOFTWARE;
}
p_UBSEC_ubsec_close(fd);
r->top = (BN_num_bits(p) + BN_num_bits(q) + BN_BITS2 - 1) / BN_BITS2;
return 1;
}
# endif
# ifndef OPENSSL_NO_DSA
# ifdef NOT_USED
static int ubsec_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 (!ubsec_mod_exp(rr, a1, p1, m, ctx))
goto end;
/* let t = a2 ^ p2 mod m */
if (!ubsec_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 ubsec_mod_exp_dsa(DSA *dsa, BIGNUM *r, BIGNUM *a,
const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
BN_MONT_CTX *m_ctx)
{
return ubsec_mod_exp(r, a, p, m, ctx);
}
# endif
# endif
# ifndef OPENSSL_NO_RSA
/*
* This function is aliased to mod_exp (with the mont stuff dropped).
*/
static int ubsec_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx,
BN_MONT_CTX *m_ctx)
{
int ret = 0;
/* Do in software if the key is too large for the hardware. */
if (BN_num_bits(m) > max_key_len) {
const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
ret = (*meth->bn_mod_exp) (r, a, p, m, ctx, m_ctx);
} else {
ret = ubsec_mod_exp(r, a, p, m, ctx);
}
return ret;
}
# endif
# ifndef OPENSSL_NO_DH
/* This function is aliased to mod_exp (with the dh and mont dropped). */
static int ubsec_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 ubsec_mod_exp(r, a, p, m, ctx);
}
# endif
# ifndef OPENSSL_NO_DSA
static DSA_SIG *ubsec_dsa_do_sign(const unsigned char *dgst, int dlen,
DSA *dsa)
{
DSA_SIG *to_return = NULL;
int s_len = 160, r_len = 160, d_len, fd;
BIGNUM m, *r = NULL, *s = NULL;
BN_init(&m);
s = BN_new();
r = BN_new();
if ((s == NULL) || (r == NULL))
goto err;
d_len = p_UBSEC_ubsec_bytes_to_bits((unsigned char *)dgst, dlen);
if (!bn_wexpand(r, (160 + BN_BITS2 - 1) / BN_BITS2) ||
(!bn_wexpand(s, (160 + BN_BITS2 - 1) / BN_BITS2))) {
UBSECerr(UBSEC_F_UBSEC_DSA_DO_SIGN, UBSEC_R_BN_EXPAND_FAIL);
goto err;
}
if (BN_bin2bn(dgst, dlen, &m) == NULL) {
UBSECerr(UBSEC_F_UBSEC_DSA_DO_SIGN, UBSEC_R_BN_EXPAND_FAIL);
goto err;
}
if ((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) <= 0) {
const DSA_METHOD *meth;
fd = 0;
UBSECerr(UBSEC_F_UBSEC_DSA_DO_SIGN, UBSEC_R_UNIT_FAILURE);
meth = DSA_OpenSSL();
to_return = meth->dsa_do_sign(dgst, dlen, dsa);
goto err;
}
if (p_UBSEC_dsa_sign_ioctl(fd,
/* compute hash before signing */
0, (unsigned char *)dgst, d_len, NULL,
/* compute random value */
0,
(unsigned char *)dsa->p->d,
BN_num_bits(dsa->p),
(unsigned char *)dsa->q->d,
BN_num_bits(dsa->q),
(unsigned char *)dsa->g->d,
BN_num_bits(dsa->g),
(unsigned char *)dsa->priv_key->d,
BN_num_bits(dsa->priv_key),
(unsigned char *)r->d, &r_len,
(unsigned char *)s->d, &s_len) != 0) {
const DSA_METHOD *meth;
UBSECerr(UBSEC_F_UBSEC_DSA_DO_SIGN, UBSEC_R_REQUEST_FAILED);
p_UBSEC_ubsec_close(fd);
meth = DSA_OpenSSL();
to_return = meth->dsa_do_sign(dgst, dlen, dsa);
goto err;
}
p_UBSEC_ubsec_close(fd);
r->top = (160 + BN_BITS2 - 1) / BN_BITS2;
s->top = (160 + BN_BITS2 - 1) / BN_BITS2;
to_return = DSA_SIG_new();
if (to_return == NULL) {
UBSECerr(UBSEC_F_UBSEC_DSA_DO_SIGN, UBSEC_R_BN_EXPAND_FAIL);
goto err;
}
to_return->r = r;
to_return->s = s;
err:
if (!to_return) {
if (r)
BN_free(r);
if (s)
BN_free(s);
}
BN_clear_free(&m);
return to_return;
}
static int ubsec_dsa_verify(const unsigned char *dgst, int dgst_len,
DSA_SIG *sig, DSA *dsa)
{
int v_len, d_len;
int to_return = 0;
int fd;
BIGNUM v, *pv = &v;
BN_init(&v);
if (!bn_wexpand(pv, dsa->p->top)) {
UBSECerr(UBSEC_F_UBSEC_DSA_VERIFY, UBSEC_R_BN_EXPAND_FAIL);
goto err;
}
v_len = BN_num_bits(dsa->p);
d_len = p_UBSEC_ubsec_bytes_to_bits((unsigned char *)dgst, dgst_len);
if ((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) <= 0) {
const DSA_METHOD *meth;
fd = 0;
UBSECerr(UBSEC_F_UBSEC_DSA_VERIFY, UBSEC_R_UNIT_FAILURE);
meth = DSA_OpenSSL();
to_return = meth->dsa_do_verify(dgst, dgst_len, sig, dsa);
goto err;
}
if (p_UBSEC_dsa_verify_ioctl(fd, 0, /* compute hash before signing */
(unsigned char *)dgst, d_len,
(unsigned char *)dsa->p->d,
BN_num_bits(dsa->p),
(unsigned char *)dsa->q->d,
BN_num_bits(dsa->q),
(unsigned char *)dsa->g->d,
BN_num_bits(dsa->g),
(unsigned char *)dsa->pub_key->d,
BN_num_bits(dsa->pub_key),
(unsigned char *)sig->r->d,
BN_num_bits(sig->r),
(unsigned char *)sig->s->d,
BN_num_bits(sig->s), (unsigned char *)v.d,
&v_len) != 0) {
const DSA_METHOD *meth;
UBSECerr(UBSEC_F_UBSEC_DSA_VERIFY, UBSEC_R_REQUEST_FAILED);
p_UBSEC_ubsec_close(fd);
meth = DSA_OpenSSL();
to_return = meth->dsa_do_verify(dgst, dgst_len, sig, dsa);
goto err;
}
p_UBSEC_ubsec_close(fd);
to_return = 1;
err:
BN_clear_free(&v);
return to_return;
}
# endif
# ifndef OPENSSL_NO_DH
static int ubsec_dh_compute_key(unsigned char *key, const BIGNUM *pub_key,
DH *dh)
{
int ret = -1, k_len, fd;
k_len = BN_num_bits(dh->p);
if ((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) <= 0) {
const DH_METHOD *meth;
UBSECerr(UBSEC_F_UBSEC_DH_COMPUTE_KEY, UBSEC_R_UNIT_FAILURE);
meth = DH_OpenSSL();
ret = meth->compute_key(key, pub_key, dh);
goto err;
}
if (p_UBSEC_diffie_hellman_agree_ioctl(fd,
(unsigned char *)dh->priv_key->d,
BN_num_bits(dh->priv_key),
(unsigned char *)pub_key->d,
BN_num_bits(pub_key),
(unsigned char *)dh->p->d,
BN_num_bits(dh->p), key,
&k_len) != 0) {
/* Hardware's a no go, failover to software */
const DH_METHOD *meth;
UBSECerr(UBSEC_F_UBSEC_DH_COMPUTE_KEY, UBSEC_R_REQUEST_FAILED);
p_UBSEC_ubsec_close(fd);
meth = DH_OpenSSL();
ret = meth->compute_key(key, pub_key, dh);
goto err;
}
p_UBSEC_ubsec_close(fd);
ret = p_UBSEC_ubsec_bits_to_bytes(k_len);
err:
return ret;
}
static int ubsec_dh_generate_key(DH *dh)
{
int ret = 0, random_bits = 0, pub_key_len = 0, priv_key_len = 0, fd;
BIGNUM *pub_key = NULL;
BIGNUM *priv_key = NULL;
/*
* How many bits should Random x be? dh_key.c
* sets the range from 0 to num_bits(modulus) ???
*/
if (dh->priv_key == NULL) {
priv_key = BN_new();
if (priv_key == NULL)
goto err;
priv_key_len = BN_num_bits(dh->p);
if (bn_wexpand(priv_key, dh->p->top) == NULL)
goto err;
do
if (!BN_rand_range(priv_key, dh->p))
goto err;
while (BN_is_zero(priv_key)) ;
random_bits = BN_num_bits(priv_key);
} else {
priv_key = dh->priv_key;
}
if (dh->pub_key == NULL) {
pub_key = BN_new();
if (pub_key == NULL)
goto err;
pub_key_len = BN_num_bits(dh->p);
if (bn_wexpand(pub_key, dh->p->top) == NULL)
goto err;
} else {
pub_key = dh->pub_key;
}
if ((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) <= 0) {
const DH_METHOD *meth;
UBSECerr(UBSEC_F_UBSEC_DH_GENERATE_KEY, UBSEC_R_UNIT_FAILURE);
meth = DH_OpenSSL();
ret = meth->generate_key(dh);
goto err;
}
if (p_UBSEC_diffie_hellman_generate_ioctl(fd,
(unsigned char *)priv_key->d,
&priv_key_len,
(unsigned char *)pub_key->d,
&pub_key_len,
(unsigned char *)dh->g->d,
BN_num_bits(dh->g),
(unsigned char *)dh->p->d,
BN_num_bits(dh->p), 0, 0,
random_bits) != 0) {
/* Hardware's a no go, failover to software */
const DH_METHOD *meth;
UBSECerr(UBSEC_F_UBSEC_DH_GENERATE_KEY, UBSEC_R_REQUEST_FAILED);
p_UBSEC_ubsec_close(fd);
meth = DH_OpenSSL();
ret = meth->generate_key(dh);
goto err;
}
p_UBSEC_ubsec_close(fd);
dh->pub_key = pub_key;
dh->pub_key->top = (pub_key_len + BN_BITS2 - 1) / BN_BITS2;
dh->priv_key = priv_key;
dh->priv_key->top = (priv_key_len + BN_BITS2 - 1) / BN_BITS2;
ret = 1;
err:
return ret;
}
# endif
# ifdef NOT_USED
static int ubsec_rand_bytes(unsigned char *buf, int num)
{
int ret = 0, fd;
if ((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) <= 0) {
const RAND_METHOD *meth;
UBSECerr(UBSEC_F_UBSEC_RAND_BYTES, UBSEC_R_UNIT_FAILURE);
num = p_UBSEC_ubsec_bits_to_bytes(num);
meth = RAND_SSLeay();
meth->seed(buf, num);
ret = meth->bytes(buf, num);
goto err;
}
num *= 8; /* bytes to bits */
if (p_UBSEC_rng_ioctl(fd, UBSEC_RNG_DIRECT, buf, &num) != 0) {
/* Hardware's a no go, failover to software */
const RAND_METHOD *meth;
UBSECerr(UBSEC_F_UBSEC_RAND_BYTES, UBSEC_R_REQUEST_FAILED);
p_UBSEC_ubsec_close(fd);
num = p_UBSEC_ubsec_bits_to_bytes(num);
meth = RAND_SSLeay();
meth->seed(buf, num);
ret = meth->bytes(buf, num);
goto err;
}
p_UBSEC_ubsec_close(fd);
ret = 1;
err:
return (ret);
}
static int ubsec_rand_status(void)
{
return 0;
}
# 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_ubsec_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_UBSEC */
#endif /* !OPENSSL_NO_HW */
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