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2d9dcd4ff0
openssl/engines/e_ubsec.c
Bodo Möller 2d9dcd4ff0 Always check bn_wexpend() return values for failure (CVE-2009-3245). 
(The CHANGES entry covers the change from PR #2111 as well, submitted by
Martin Olsson.)

Submitted by: Neel Mehta
2010-02-23 10:36:35 +00:00

1072 lines
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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
static t_UBSEC_rsa_mod_exp_ioctl *p_UBSEC_rsa_mod_exp_ioctl = NULL;
#ifndef OPENSSL_NO_RSA
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,
m_len,
fd;
m_len = BN_num_bytes(p) + BN_num_bytes(q) + 1;
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, 0, /* compute hash before signing */
(unsigned char *)dgst, d_len,
NULL, 0, /* compute random value */
(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();
pub_key_len = BN_num_bits(dh->p);
if(bn_wexpand(pub_key, dh->p->top) == NULL) goto err;
if(pub_key == 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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