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openssl/engines/e_cswift.c

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/* crypto/engine/hw_cswift.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_HW
#ifndef OPENSSL_NO_HW_CSWIFT
/* Attribution notice: Rainbow have generously allowed me to reproduce
* the necessary definitions here from their API. This means the support
* can build independently of whether application builders have the
* API or hardware. This will allow developers to easily produce software
* that has latent hardware support for any users that have accelerators
* installed, without the developers themselves needing anything extra.
*
* I have only clipped the parts from the CryptoSwift header files that
* are (or seem) relevant to the CryptoSwift support code. This is
* simply to keep the file sizes reasonable.
* [Geoff]
*/
#ifdef FLAT_INC
#include "cswift.h"
#else
#include "vendor_defns/cswift.h"
#endif
#define CSWIFT_LIB_NAME "cswift engine"
#include "e_cswift_err.c"
#define DECIMAL_SIZE(type) ((sizeof(type)*8+2)/3+1)
static int cswift_destroy(ENGINE *e);
static int cswift_init(ENGINE *e);
static int cswift_finish(ENGINE *e);
static int cswift_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void));
/* BIGNUM stuff */
static int cswift_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx);
static int cswift_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
const BIGNUM *q, const BIGNUM *dmp1, const BIGNUM *dmq1,
const BIGNUM *iqmp, BN_CTX *ctx);
#ifndef OPENSSL_NO_RSA
/* RSA stuff */
static int cswift_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa);
#endif
/* This function is aliased to mod_exp (with the mont stuff dropped). */
static int cswift_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
#ifndef OPENSSL_NO_DSA
/* DSA stuff */
static DSA_SIG *cswift_dsa_sign(const unsigned char *dgst, int dlen, DSA *dsa);
static int cswift_dsa_verify(const unsigned char *dgst, int dgst_len,
DSA_SIG *sig, DSA *dsa);
#endif
#ifndef OPENSSL_NO_DH
/* DH stuff */
/* This function is alised to mod_exp (with the DH and mont dropped). */
static int cswift_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
/* RAND stuff */
static int cswift_rand_bytes(unsigned char *buf, int num);
static int cswift_rand_status(void);
/* The definitions for control commands specific to this engine */
#define CSWIFT_CMD_SO_PATH ENGINE_CMD_BASE
static const ENGINE_CMD_DEFN cswift_cmd_defns[] = {
{CSWIFT_CMD_SO_PATH,
"SO_PATH",
"Specifies the path to the 'cswift' 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 cswift_rsa =
{
"CryptoSwift RSA method",
NULL,
NULL,
NULL,
NULL,
cswift_rsa_mod_exp,
cswift_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 cswift_dsa =
{
"CryptoSwift DSA method",
cswift_dsa_sign,
NULL, /* dsa_sign_setup */
cswift_dsa_verify,
NULL, /* dsa_mod_exp */
NULL, /* 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 cswift_dh =
{
"CryptoSwift DH method",
NULL,
NULL,
cswift_mod_exp_dh,
NULL,
NULL,
0,
NULL,
NULL
};
#endif
static RAND_METHOD cswift_random =
{
/* "CryptoSwift RAND method", */
NULL,
cswift_rand_bytes,
NULL,
NULL,
cswift_rand_bytes,
cswift_rand_status,
};
/* Constants used when creating the ENGINE */
static const char *engine_cswift_id = "cswift";
static const char *engine_cswift_name = "CryptoSwift hardware engine support";
/* This internal function is used by ENGINE_cswift() 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
const DH_METHOD *meth2;
#endif
if(!ENGINE_set_id(e, engine_cswift_id) ||
!ENGINE_set_name(e, engine_cswift_name) ||
#ifndef OPENSSL_NO_RSA
!ENGINE_set_RSA(e, &cswift_rsa) ||
#endif
#ifndef OPENSSL_NO_DSA
!ENGINE_set_DSA(e, &cswift_dsa) ||
#endif
#ifndef OPENSSL_NO_DH
!ENGINE_set_DH(e, &cswift_dh) ||
#endif
!ENGINE_set_RAND(e, &cswift_random) ||
!ENGINE_set_destroy_function(e, cswift_destroy) ||
!ENGINE_set_init_function(e, cswift_init) ||
!ENGINE_set_finish_function(e, cswift_finish) ||
!ENGINE_set_ctrl_function(e, cswift_ctrl) ||
!ENGINE_set_cmd_defns(e, cswift_cmd_defns))
return 0;
#ifndef OPENSSL_NO_RSA
/* We know that the "PKCS1_SSLeay()" functions hook properly
* to the cswift-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();
cswift_rsa.rsa_pub_enc = meth1->rsa_pub_enc;
cswift_rsa.rsa_pub_dec = meth1->rsa_pub_dec;
cswift_rsa.rsa_priv_enc = meth1->rsa_priv_enc;
cswift_rsa.rsa_priv_dec = meth1->rsa_priv_dec;
#endif
#ifndef OPENSSL_NO_DH
/* Much the same for Diffie-Hellman */
meth2 = DH_OpenSSL();
cswift_dh.generate_key = meth2->generate_key;
cswift_dh.compute_key = meth2->compute_key;
#endif
/* Ensure the cswift error handling is set up */
ERR_load_CSWIFT_strings();
return 1;
}
#ifdef OPENSSL_NO_DYNAMIC_ENGINE
static ENGINE *engine_cswift(void)
{
ENGINE *ret = ENGINE_new();
if(!ret)
return NULL;
if(!bind_helper(ret))
{
ENGINE_free(ret);
return NULL;
}
return ret;
}
void ENGINE_load_cswift(void)
{
/* Copied from eng_[openssl|dyn].c */
ENGINE *toadd = engine_cswift();
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 CryptoSwift 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 *cswift_dso = NULL;
/* These are the function pointers that are (un)set when the library has
* successfully (un)loaded. */
t_swAcquireAccContext *p_CSwift_AcquireAccContext = NULL;
t_swAttachKeyParam *p_CSwift_AttachKeyParam = NULL;
t_swSimpleRequest *p_CSwift_SimpleRequest = NULL;
t_swReleaseAccContext *p_CSwift_ReleaseAccContext = NULL;
/* Used in the DSO operations. */
static const char *CSWIFT_LIBNAME = NULL;
static const char *get_CSWIFT_LIBNAME(void)
{
if(CSWIFT_LIBNAME)
return CSWIFT_LIBNAME;
return "swift";
}
static void free_CSWIFT_LIBNAME(void)
{
if(CSWIFT_LIBNAME)
OPENSSL_free((void*)CSWIFT_LIBNAME);
CSWIFT_LIBNAME = NULL;
}
static long set_CSWIFT_LIBNAME(const char *name)
{
free_CSWIFT_LIBNAME();
return (((CSWIFT_LIBNAME = BUF_strdup(name)) != NULL) ? 1 : 0);
}
static const char *CSWIFT_F1 = "swAcquireAccContext";
static const char *CSWIFT_F2 = "swAttachKeyParam";
static const char *CSWIFT_F3 = "swSimpleRequest";
static const char *CSWIFT_F4 = "swReleaseAccContext";
/* CryptoSwift library functions and mechanics - these are used by the
* higher-level functions further down. NB: As and where there's no
* error checking, take a look lower down where these functions are
* called, the checking and error handling is probably down there. */
/* utility function to obtain a context */
static int get_context(SW_CONTEXT_HANDLE *hac)
{
SW_STATUS status;
status = p_CSwift_AcquireAccContext(hac);
if(status != SW_OK)
return 0;
return 1;
}
/* similarly to release one. */
static void release_context(SW_CONTEXT_HANDLE hac)
{
p_CSwift_ReleaseAccContext(hac);
}
/* Destructor (complements the "ENGINE_cswift()" constructor) */
static int cswift_destroy(ENGINE *e)
{
free_CSWIFT_LIBNAME();
ERR_unload_CSWIFT_strings();
return 1;
}
/* (de)initialisation functions. */
static int cswift_init(ENGINE *e)
{
SW_CONTEXT_HANDLE hac;
t_swAcquireAccContext *p1;
t_swAttachKeyParam *p2;
t_swSimpleRequest *p3;
t_swReleaseAccContext *p4;
if(cswift_dso != NULL)
{
CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_ALREADY_LOADED);
goto err;
}
/* Attempt to load libswift.so/swift.dll/whatever. */
cswift_dso = DSO_load(NULL, get_CSWIFT_LIBNAME(), NULL, 0);
if(cswift_dso == NULL)
{
CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_NOT_LOADED);
goto err;
}
if(!(p1 = (t_swAcquireAccContext *)
DSO_bind_func(cswift_dso, CSWIFT_F1)) ||
!(p2 = (t_swAttachKeyParam *)
DSO_bind_func(cswift_dso, CSWIFT_F2)) ||
!(p3 = (t_swSimpleRequest *)
DSO_bind_func(cswift_dso, CSWIFT_F3)) ||
!(p4 = (t_swReleaseAccContext *)
DSO_bind_func(cswift_dso, CSWIFT_F4)))
{
CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_NOT_LOADED);
goto err;
}
/* Copy the pointers */
p_CSwift_AcquireAccContext = p1;
p_CSwift_AttachKeyParam = p2;
p_CSwift_SimpleRequest = p3;
p_CSwift_ReleaseAccContext = p4;
/* Try and get a context - if not, we may have a DSO but no
* accelerator! */
if(!get_context(&hac))
{
CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_UNIT_FAILURE);
goto err;
}
release_context(hac);
/* Everything's fine. */
return 1;
err:
if(cswift_dso)
DSO_free(cswift_dso);
p_CSwift_AcquireAccContext = NULL;
p_CSwift_AttachKeyParam = NULL;
p_CSwift_SimpleRequest = NULL;
p_CSwift_ReleaseAccContext = NULL;
return 0;
}
static int cswift_finish(ENGINE *e)
{
free_CSWIFT_LIBNAME();
if(cswift_dso == NULL)
{
CSWIFTerr(CSWIFT_F_CSWIFT_FINISH,CSWIFT_R_NOT_LOADED);
return 0;
}
if(!DSO_free(cswift_dso))
{
CSWIFTerr(CSWIFT_F_CSWIFT_FINISH,CSWIFT_R_UNIT_FAILURE);
return 0;
}
cswift_dso = NULL;
p_CSwift_AcquireAccContext = NULL;
p_CSwift_AttachKeyParam = NULL;
p_CSwift_SimpleRequest = NULL;
p_CSwift_ReleaseAccContext = NULL;
return 1;
}
static int cswift_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void))
{
int initialised = ((cswift_dso == NULL) ? 0 : 1);
switch(cmd)
{
case CSWIFT_CMD_SO_PATH:
if(p == NULL)
{
CSWIFTerr(CSWIFT_F_CSWIFT_CTRL,ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
if(initialised)
{
CSWIFTerr(CSWIFT_F_CSWIFT_CTRL,CSWIFT_R_ALREADY_LOADED);
return 0;
}
return set_CSWIFT_LIBNAME((const char *)p);
default:
break;
}
CSWIFTerr(CSWIFT_F_CSWIFT_CTRL,CSWIFT_R_CTRL_COMMAND_NOT_IMPLEMENTED);
return 0;
}
/* Un petit mod_exp */
static int cswift_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 CryptoSwift 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;
SW_STATUS sw_status;
SW_LARGENUMBER arg, res;
SW_PARAM sw_param;
SW_CONTEXT_HANDLE hac;
int to_return, acquired;
modulus = exponent = argument = result = NULL;
to_return = 0; /* expect failure */
acquired = 0;
if(!get_context(&hac))
{
CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_UNIT_FAILURE);
goto err;
}
acquired = 1;
/* 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)
{
CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_BN_CTX_FULL);
goto err;
}
if(!bn_wexpand(modulus, m->top) || !bn_wexpand(exponent, p->top) ||
!bn_wexpand(argument, a->top) || !bn_wexpand(result, m->top))
{
CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_BN_EXPAND_FAIL);
goto err;
}
sw_param.type = SW_ALG_EXP;
sw_param.up.exp.modulus.nbytes = BN_bn2bin(m,
(unsigned char *)modulus->d);
sw_param.up.exp.modulus.value = (unsigned char *)modulus->d;
sw_param.up.exp.exponent.nbytes = BN_bn2bin(p,
(unsigned char *)exponent->d);
sw_param.up.exp.exponent.value = (unsigned char *)exponent->d;
/* Attach the key params */
sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
switch(sw_status)
{
case SW_OK:
break;
case SW_ERR_INPUT_SIZE:
CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_BAD_KEY_SIZE);
goto err;
default:
{
char tmpbuf[DECIMAL_SIZE(sw_status)+1];
CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_REQUEST_FAILED);
sprintf(tmpbuf, "%ld", sw_status);
ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
}
goto err;
}
/* Prepare the argument and response */
arg.nbytes = BN_bn2bin(a, (unsigned char *)argument->d);
arg.value = (unsigned char *)argument->d;
res.nbytes = BN_num_bytes(m);
memset(result->d, 0, res.nbytes);
res.value = (unsigned char *)result->d;
/* Perform the operation */
if((sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_MODEXP, &arg, 1,
&res, 1)) != SW_OK)
{
char tmpbuf[DECIMAL_SIZE(sw_status)+1];
CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_REQUEST_FAILED);
sprintf(tmpbuf, "%ld", sw_status);
ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
goto err;
}
/* Convert the response */
BN_bin2bn((unsigned char *)result->d, res.nbytes, r);
to_return = 1;
err:
if(acquired)
release_context(hac);
BN_CTX_end(ctx);
return to_return;
}
/* Un petit mod_exp chinois */
static int cswift_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
const BIGNUM *q, const BIGNUM *dmp1,
const BIGNUM *dmq1, const BIGNUM *iqmp, BN_CTX *ctx)
{
SW_STATUS sw_status;
SW_LARGENUMBER arg, res;
SW_PARAM sw_param;
SW_CONTEXT_HANDLE hac;
BIGNUM *rsa_p = NULL;
BIGNUM *rsa_q = NULL;
BIGNUM *rsa_dmp1 = NULL;
BIGNUM *rsa_dmq1 = NULL;
BIGNUM *rsa_iqmp = NULL;
BIGNUM *argument = NULL;
BIGNUM *result = NULL;
int to_return = 0; /* expect failure */
int acquired = 0;
if(!get_context(&hac))
{
CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_UNIT_FAILURE);
goto err;
}
acquired = 1;
/* Prepare the params */
BN_CTX_start(ctx);
rsa_p = BN_CTX_get(ctx);
rsa_q = BN_CTX_get(ctx);
rsa_dmp1 = BN_CTX_get(ctx);
rsa_dmq1 = BN_CTX_get(ctx);
rsa_iqmp = BN_CTX_get(ctx);
argument = BN_CTX_get(ctx);
result = BN_CTX_get(ctx);
if(!result)
{
CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BN_CTX_FULL);
goto err;
}
if(!bn_wexpand(rsa_p, p->top) || !bn_wexpand(rsa_q, q->top) ||
!bn_wexpand(rsa_dmp1, dmp1->top) ||
!bn_wexpand(rsa_dmq1, dmq1->top) ||
!bn_wexpand(rsa_iqmp, iqmp->top) ||
!bn_wexpand(argument, a->top) ||
!bn_wexpand(result, p->top + q->top))
{
CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BN_EXPAND_FAIL);
goto err;
}
sw_param.type = SW_ALG_CRT;
sw_param.up.crt.p.nbytes = BN_bn2bin(p, (unsigned char *)rsa_p->d);
sw_param.up.crt.p.value = (unsigned char *)rsa_p->d;
sw_param.up.crt.q.nbytes = BN_bn2bin(q, (unsigned char *)rsa_q->d);
sw_param.up.crt.q.value = (unsigned char *)rsa_q->d;
sw_param.up.crt.dmp1.nbytes = BN_bn2bin(dmp1,
(unsigned char *)rsa_dmp1->d);
sw_param.up.crt.dmp1.value = (unsigned char *)rsa_dmp1->d;
sw_param.up.crt.dmq1.nbytes = BN_bn2bin(dmq1,
(unsigned char *)rsa_dmq1->d);
sw_param.up.crt.dmq1.value = (unsigned char *)rsa_dmq1->d;
sw_param.up.crt.iqmp.nbytes = BN_bn2bin(iqmp,
(unsigned char *)rsa_iqmp->d);
sw_param.up.crt.iqmp.value = (unsigned char *)rsa_iqmp->d;
/* Attach the key params */
sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
switch(sw_status)
{
case SW_OK:
break;
case SW_ERR_INPUT_SIZE:
CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BAD_KEY_SIZE);
goto err;
default:
{
char tmpbuf[DECIMAL_SIZE(sw_status)+1];
CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_REQUEST_FAILED);
sprintf(tmpbuf, "%ld", sw_status);
ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
}
goto err;
}
/* Prepare the argument and response */
arg.nbytes = BN_bn2bin(a, (unsigned char *)argument->d);
arg.value = (unsigned char *)argument->d;
res.nbytes = 2 * BN_num_bytes(p);
memset(result->d, 0, res.nbytes);
res.value = (unsigned char *)result->d;
/* Perform the operation */
if((sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_MODEXP_CRT, &arg, 1,
&res, 1)) != SW_OK)
{
char tmpbuf[DECIMAL_SIZE(sw_status)+1];
CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_REQUEST_FAILED);
sprintf(tmpbuf, "%ld", sw_status);
ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
goto err;
}
/* Convert the response */
BN_bin2bn((unsigned char *)result->d, res.nbytes, r);
to_return = 1;
err:
if(acquired)
release_context(hac);
BN_CTX_end(ctx);
return to_return;
}
#ifndef OPENSSL_NO_RSA
static int cswift_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa)
{
BN_CTX *ctx;
int to_return = 0;
if((ctx = BN_CTX_new()) == NULL)
goto err;
if(!rsa->p || !rsa->q || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp)
{
CSWIFTerr(CSWIFT_F_CSWIFT_RSA_MOD_EXP,CSWIFT_R_MISSING_KEY_COMPONENTS);
goto err;
}
to_return = cswift_mod_exp_crt(r0, I, rsa->p, rsa->q, rsa->dmp1,
rsa->dmq1, rsa->iqmp, ctx);
err:
if(ctx)
BN_CTX_free(ctx);
return to_return;
}
#endif
/* This function is aliased to mod_exp (with the mont stuff dropped). */
static int cswift_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
{
return cswift_mod_exp(r, a, p, m, ctx);
}
#ifndef OPENSSL_NO_DSA
static DSA_SIG *cswift_dsa_sign(const unsigned char *dgst, int dlen, DSA *dsa)
{
SW_CONTEXT_HANDLE hac;
SW_PARAM sw_param;
SW_STATUS sw_status;
SW_LARGENUMBER arg, res;
unsigned char *ptr;
BN_CTX *ctx;
BIGNUM *dsa_p = NULL;
BIGNUM *dsa_q = NULL;
BIGNUM *dsa_g = NULL;
BIGNUM *dsa_key = NULL;
BIGNUM *result = NULL;
DSA_SIG *to_return = NULL;
int acquired = 0;
if((ctx = BN_CTX_new()) == NULL)
goto err;
if(!get_context(&hac))
{
CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_UNIT_FAILURE);
goto err;
}
acquired = 1;
/* Prepare the params */
BN_CTX_start(ctx);
dsa_p = BN_CTX_get(ctx);
dsa_q = BN_CTX_get(ctx);
dsa_g = BN_CTX_get(ctx);
dsa_key = BN_CTX_get(ctx);
result = BN_CTX_get(ctx);
if(!result)
{
CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BN_CTX_FULL);
goto err;
}
if(!bn_wexpand(dsa_p, dsa->p->top) ||
!bn_wexpand(dsa_q, dsa->q->top) ||
!bn_wexpand(dsa_g, dsa->g->top) ||
!bn_wexpand(dsa_key, dsa->priv_key->top) ||
!bn_wexpand(result, dsa->p->top))
{
CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BN_EXPAND_FAIL);
goto err;
}
sw_param.type = SW_ALG_DSA;
sw_param.up.dsa.p.nbytes = BN_bn2bin(dsa->p,
(unsigned char *)dsa_p->d);
sw_param.up.dsa.p.value = (unsigned char *)dsa_p->d;
sw_param.up.dsa.q.nbytes = BN_bn2bin(dsa->q,
(unsigned char *)dsa_q->d);
sw_param.up.dsa.q.value = (unsigned char *)dsa_q->d;
sw_param.up.dsa.g.nbytes = BN_bn2bin(dsa->g,
(unsigned char *)dsa_g->d);
sw_param.up.dsa.g.value = (unsigned char *)dsa_g->d;
sw_param.up.dsa.key.nbytes = BN_bn2bin(dsa->priv_key,
(unsigned char *)dsa_key->d);
sw_param.up.dsa.key.value = (unsigned char *)dsa_key->d;
/* Attach the key params */
sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
switch(sw_status)
{
case SW_OK:
break;
case SW_ERR_INPUT_SIZE:
CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BAD_KEY_SIZE);
goto err;
default:
{
char tmpbuf[DECIMAL_SIZE(sw_status)+1];
CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_REQUEST_FAILED);
sprintf(tmpbuf, "%ld", sw_status);
ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
}
goto err;
}
/* Prepare the argument and response */
arg.nbytes = dlen;
arg.value = (unsigned char *)dgst;
res.nbytes = BN_num_bytes(dsa->p);
memset(result->d, 0, res.nbytes);
res.value = (unsigned char *)result->d;
/* Perform the operation */
sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_DSS_SIGN, &arg, 1,
&res, 1);
if(sw_status != SW_OK)
{
char tmpbuf[DECIMAL_SIZE(sw_status)+1];
CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_REQUEST_FAILED);
sprintf(tmpbuf, "%ld", sw_status);
ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
goto err;
}
/* Convert the response */
ptr = (unsigned char *)result->d;
if((to_return = DSA_SIG_new()) == NULL)
goto err;
to_return->r = BN_bin2bn((unsigned char *)result->d, 20, NULL);
to_return->s = BN_bin2bn((unsigned char *)result->d + 20, 20, NULL);
err:
if(acquired)
release_context(hac);
if(ctx)
{
BN_CTX_end(ctx);
BN_CTX_free(ctx);
}
return to_return;
}
static int cswift_dsa_verify(const unsigned char *dgst, int dgst_len,
DSA_SIG *sig, DSA *dsa)
{
SW_CONTEXT_HANDLE hac;
SW_PARAM sw_param;
SW_STATUS sw_status;
SW_LARGENUMBER arg[2], res;
unsigned long sig_result;
BN_CTX *ctx;
BIGNUM *dsa_p = NULL;
BIGNUM *dsa_q = NULL;
BIGNUM *dsa_g = NULL;
BIGNUM *dsa_key = NULL;
BIGNUM *argument = NULL;
int to_return = -1;
int acquired = 0;
if((ctx = BN_CTX_new()) == NULL)
goto err;
if(!get_context(&hac))
{
CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_UNIT_FAILURE);
goto err;
}
acquired = 1;
/* Prepare the params */
BN_CTX_start(ctx);
dsa_p = BN_CTX_get(ctx);
dsa_q = BN_CTX_get(ctx);
dsa_g = BN_CTX_get(ctx);
dsa_key = BN_CTX_get(ctx);
argument = BN_CTX_get(ctx);
if(!argument)
{
CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_BN_CTX_FULL);
goto err;
}
if(!bn_wexpand(dsa_p, dsa->p->top) ||
!bn_wexpand(dsa_q, dsa->q->top) ||
!bn_wexpand(dsa_g, dsa->g->top) ||
!bn_wexpand(dsa_key, dsa->pub_key->top) ||
!bn_wexpand(argument, 40))
{
CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_BN_EXPAND_FAIL);
goto err;
}
sw_param.type = SW_ALG_DSA;
sw_param.up.dsa.p.nbytes = BN_bn2bin(dsa->p,
(unsigned char *)dsa_p->d);
sw_param.up.dsa.p.value = (unsigned char *)dsa_p->d;
sw_param.up.dsa.q.nbytes = BN_bn2bin(dsa->q,
(unsigned char *)dsa_q->d);
sw_param.up.dsa.q.value = (unsigned char *)dsa_q->d;
sw_param.up.dsa.g.nbytes = BN_bn2bin(dsa->g,
(unsigned char *)dsa_g->d);
sw_param.up.dsa.g.value = (unsigned char *)dsa_g->d;
sw_param.up.dsa.key.nbytes = BN_bn2bin(dsa->pub_key,
(unsigned char *)dsa_key->d);
sw_param.up.dsa.key.value = (unsigned char *)dsa_key->d;
/* Attach the key params */
sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
switch(sw_status)
{
case SW_OK:
break;
case SW_ERR_INPUT_SIZE:
CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_BAD_KEY_SIZE);
goto err;
default:
{
char tmpbuf[DECIMAL_SIZE(sw_status)+1];
CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_REQUEST_FAILED);
sprintf(tmpbuf, "%ld", sw_status);
ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
}
goto err;
}
/* Prepare the argument and response */
arg[0].nbytes = dgst_len;
arg[0].value = (unsigned char *)dgst;
arg[1].nbytes = 40;
arg[1].value = (unsigned char *)argument->d;
memset(arg[1].value, 0, 40);
BN_bn2bin(sig->r, arg[1].value + 20 - BN_num_bytes(sig->r));
BN_bn2bin(sig->s, arg[1].value + 40 - BN_num_bytes(sig->s));
res.nbytes = 4; /* unsigned long */
res.value = (unsigned char *)(&sig_result);
/* Perform the operation */
sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_DSS_VERIFY, arg, 2,
&res, 1);
if(sw_status != SW_OK)
{
char tmpbuf[DECIMAL_SIZE(sw_status)+1];
CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_REQUEST_FAILED);
sprintf(tmpbuf, "%ld", sw_status);
ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
goto err;
}
/* Convert the response */
to_return = ((sig_result == 0) ? 0 : 1);
err:
if(acquired)
release_context(hac);
if(ctx)
{
BN_CTX_end(ctx);
BN_CTX_free(ctx);
}
return to_return;
}
#endif
#ifndef OPENSSL_NO_DH
/* This function is aliased to mod_exp (with the dh and mont dropped). */
static int cswift_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 cswift_mod_exp(r, a, p, m, ctx);
}
#endif
/* Random bytes are good */
static int cswift_rand_bytes(unsigned char *buf, int num)
{
SW_CONTEXT_HANDLE hac;
SW_STATUS swrc;
SW_LARGENUMBER largenum;
size_t nbytes = 0;
int acquired = 0;
int to_return = 0; /* assume failure */
if (!get_context(&hac))
{
CSWIFTerr(CSWIFT_F_CSWIFT_CTRL, CSWIFT_R_UNIT_FAILURE);
goto err;
}
acquired = 1;
while (nbytes < (size_t)num)
{
/* tell CryptoSwift how many bytes we want and where we want it.
* Note: - CryptoSwift cannot do more than 4096 bytes at a time.
* - CryptoSwift can only do multiple of 32-bits. */
largenum.value = (SW_BYTE *) buf + nbytes;
if (4096 > num - nbytes)
largenum.nbytes = num - nbytes;
else
largenum.nbytes = 4096;
swrc = p_CSwift_SimpleRequest(hac, SW_CMD_RAND, NULL, 0, &largenum, 1);
if (swrc != SW_OK)
{
char tmpbuf[20];
CSWIFTerr(CSWIFT_F_CSWIFT_CTRL, CSWIFT_R_REQUEST_FAILED);
sprintf(tmpbuf, "%ld", swrc);
ERR_add_error_data(2, "CryptoSwift error number is ", tmpbuf);
goto err;
}
nbytes += largenum.nbytes;
}
to_return = 1; /* success */
err:
if (acquired)
release_context(hac);
return to_return;
}
static int cswift_rand_status(void)
{
return 1;
}
/* 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_cswift_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_CSWIFT */
#endif /* !OPENSSL_NO_HW */
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