/* crypto/engine/hw_ibmca.c */
/*
* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL project
* 2000.
*/
/* ====================================================================
* Copyright (c) 1999 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).
*
*/
/* (C) COPYRIGHT International Business Machines Corp. 2001 */
#include <stdio.h>
#include <openssl/crypto.h>
#include <openssl/dso.h>
#include <openssl/engine.h>
#ifndef OPENSSL_NO_HW
# ifndef OPENSSL_NO_HW_IBMCA
# ifdef FLAT_INC
# include "ica_openssl_api.h"
# else
# include "vendor_defns/ica_openssl_api.h"
# endif
# define IBMCA_LIB_NAME "ibmca engine"
# include "hw_ibmca_err.c"
static int ibmca_destroy(ENGINE *e);
static int ibmca_init(ENGINE *e);
static int ibmca_finish(ENGINE *e);
static int ibmca_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f) ());
static const char *IBMCA_F1 = "icaOpenAdapter";
static const char *IBMCA_F2 = "icaCloseAdapter";
static const char *IBMCA_F3 = "icaRsaModExpo";
static const char *IBMCA_F4 = "icaRandomNumberGenerate";
static const char *IBMCA_F5 = "icaRsaCrt";
ICA_ADAPTER_HANDLE handle = 0;
/* BIGNUM stuff */
static int ibmca_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx);
static int ibmca_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 ibmca_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 ibmca_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 int ibmca_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 ibmca_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 ibmca_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 ibmca_rand_bytes(unsigned char *buf, int num);
static int ibmca_rand_status(void);
/* WJH - check for more commands, like in nuron */
/* The definitions for control commands specific to this engine */
# define IBMCA_CMD_SO_PATH ENGINE_CMD_BASE
static const ENGINE_CMD_DEFN ibmca_cmd_defns[] = {
{IBMCA_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 ibmca_rsa = {
"Ibmca RSA method",
NULL,
NULL,
NULL,
NULL,
ibmca_rsa_mod_exp,
ibmca_mod_exp_mont,
NULL,
NULL,
0,
NULL,
NULL,
NULL
};
# endif
# ifndef OPENSSL_NO_DSA
/* Our internal DSA_METHOD that we provide pointers to */
static DSA_METHOD ibmca_dsa = {
"Ibmca DSA method",
NULL, /* dsa_do_sign */
NULL, /* dsa_sign_setup */
NULL, /* dsa_do_verify */
ibmca_dsa_mod_exp, /* dsa_mod_exp */
ibmca_mod_exp_dsa, /* bn_mod_exp */
NULL, /* init */
NULL, /* finish */
0, /* flags */
NULL /* app_data */
};
# endif
# ifndef OPENSSL_NO_DH
/* Our internal DH_METHOD that we provide pointers to */
static DH_METHOD ibmca_dh = {
"Ibmca DH method",
NULL,
NULL,
ibmca_mod_exp_dh,
NULL,
NULL,
0,
NULL
};
# endif
static RAND_METHOD ibmca_rand = {
/* "IBMCA RAND method", */
NULL,
ibmca_rand_bytes,
NULL,
NULL,
ibmca_rand_bytes,
ibmca_rand_status,
};
/* Constants used when creating the ENGINE */
static const char *engine_ibmca_id = "ibmca";
static const char *engine_ibmca_name = "Ibmca hardware engine support";
/*
* This internal function is used by ENGINE_ibmca() 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_ibmca_id) ||
!ENGINE_set_name(e, engine_ibmca_name) ||
# ifndef OPENSSL_NO_RSA
!ENGINE_set_RSA(e, &ibmca_rsa) ||
# endif
# ifndef OPENSSL_NO_DSA
!ENGINE_set_DSA(e, &ibmca_dsa) ||
# endif
# ifndef OPENSSL_NO_DH
!ENGINE_set_DH(e, &ibmca_dh) ||
# endif
!ENGINE_set_RAND(e, &ibmca_rand) ||
!ENGINE_set_destroy_function(e, ibmca_destroy) ||
!ENGINE_set_init_function(e, ibmca_init) ||
!ENGINE_set_finish_function(e, ibmca_finish) ||
!ENGINE_set_ctrl_function(e, ibmca_ctrl) ||
!ENGINE_set_cmd_defns(e, ibmca_cmd_defns))
return 0;
# ifndef OPENSSL_NO_RSA
/*
* We know that the "PKCS1_OpenSSL()" functions hook properly to the
* ibmca-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_OpenSSL();
ibmca_rsa.rsa_pub_enc = meth1->rsa_pub_enc;
ibmca_rsa.rsa_pub_dec = meth1->rsa_pub_dec;
ibmca_rsa.rsa_priv_enc = meth1->rsa_priv_enc;
ibmca_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();
ibmca_dsa.dsa_do_sign = meth2->dsa_do_sign;
ibmca_dsa.dsa_sign_setup = meth2->dsa_sign_setup;
ibmca_dsa.dsa_do_verify = meth2->dsa_do_verify;
# endif
# ifndef OPENSSL_NO_DH
/* Much the same for Diffie-Hellman */
meth3 = DH_OpenSSL();
ibmca_dh.generate_key = meth3->generate_key;
ibmca_dh.compute_key = meth3->compute_key;
# endif
/* Ensure the ibmca error handling is set up */
ERR_load_IBMCA_strings();
return 1;
}
static ENGINE *engine_ibmca(void)
{
ENGINE *ret = ENGINE_new();
if (!ret)
return NULL;
if (!bind_helper(ret)) {
ENGINE_free(ret);
return NULL;
}
return ret;
}
# ifdef ENGINE_DYNAMIC_SUPPORT
static
# endif
void ENGINE_load_ibmca(void)
{
/* Copied from eng_[openssl|dyn].c */
ENGINE *toadd = engine_ibmca();
if (!toadd)
return;
ENGINE_add(toadd);
ENGINE_free(toadd);
ERR_clear_error();
}
/* Destructor (complements the "ENGINE_ibmca()" constructor) */
static int ibmca_destroy(ENGINE *e)
{
/*
* Unload the ibmca 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_IBMCA_strings();
return 1;
}
/*
* This is a process-global DSO handle used for loading and unloading the
* Ibmca 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 *ibmca_dso = NULL;
/*
* These are the function pointers that are (un)set when the library has
* successfully (un)loaded.
*/
static unsigned int (ICA_CALL * p_icaOpenAdapter) ();
static unsigned int (ICA_CALL * p_icaCloseAdapter) ();
static unsigned int (ICA_CALL * p_icaRsaModExpo) ();
static unsigned int (ICA_CALL * p_icaRandomNumberGenerate) ();
static unsigned int (ICA_CALL * p_icaRsaCrt) ();
/* utility function to obtain a context */
static int get_context(ICA_ADAPTER_HANDLE * p_handle)
{
unsigned int status = 0;
status = p_icaOpenAdapter(0, p_handle);
if (status != 0)
return 0;
return 1;
}
/* similarly to release one. */
static void release_context(ICA_ADAPTER_HANDLE handle)
{
p_icaCloseAdapter(handle);
}
/* (de)initialisation functions. */
static int ibmca_init(ENGINE *e)
{
void (*p1) ();
void (*p2) ();
void (*p3) ();
void (*p4) ();
void (*p5) ();
if (ibmca_dso != NULL) {
IBMCAerr(IBMCA_F_IBMCA_INIT, IBMCA_R_ALREADY_LOADED);
goto err;
}
/*
* Attempt to load libatasi.so/atasi.dll/whatever. Needs to be changed
* unfortunately because the Ibmca drivers don't have standard library
* names that can be platform-translated well.
*/
/*
* TODO: Work out how to actually map to the names the Ibmca 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.
*/
/* WJH XXX check name translation */
ibmca_dso = DSO_load(NULL, IBMCA_LIBNAME, NULL,
/*
* DSO_FLAG_NAME_TRANSLATION
*/ 0);
if (ibmca_dso == NULL) {
IBMCAerr(IBMCA_F_IBMCA_INIT, IBMCA_R_DSO_FAILURE);
goto err;
}
if ((p1 = DSO_bind_func(ibmca_dso, IBMCA_F1)) == NULL
|| (p2 = DSO_bind_func(ibmca_dso, IBMCA_F2)) == NULL
|| (p3 = DSO_bind_func(ibmca_dso, IBMCA_F3)) == NULL
|| (p4 = DSO_bind_func(ibmca_dso, IBMCA_F4)) == NULL
|| (p5 = DSO_bind_func(ibmca_dso, IBMCA_F5)) == NULL) {
IBMCAerr(IBMCA_F_IBMCA_INIT, IBMCA_R_DSO_FAILURE);
goto err;
}
/* Copy the pointers */
p_icaOpenAdapter = (unsigned int (ICA_CALL *) ())p1;
p_icaCloseAdapter = (unsigned int (ICA_CALL *) ())p2;
p_icaRsaModExpo = (unsigned int (ICA_CALL *) ())p3;
p_icaRandomNumberGenerate = (unsigned int (ICA_CALL *) ())p4;
p_icaRsaCrt = (unsigned int (ICA_CALL *) ())p5;
if (!get_context(&handle)) {
IBMCAerr(IBMCA_F_IBMCA_INIT, IBMCA_R_UNIT_FAILURE);
goto err;
}
return 1;
err:
DSO_free(ibmca_dso);
p_icaOpenAdapter = NULL;
p_icaCloseAdapter = NULL;
p_icaRsaModExpo = NULL;
p_icaRandomNumberGenerate = NULL;
return 0;
}
static int ibmca_finish(ENGINE *e)
{
if (ibmca_dso == NULL) {
IBMCAerr(IBMCA_F_IBMCA_FINISH, IBMCA_R_NOT_LOADED);
return 0;
}
release_context(handle);
if (!DSO_free(ibmca_dso)) {
IBMCAerr(IBMCA_F_IBMCA_FINISH, IBMCA_R_DSO_FAILURE);
return 0;
}
ibmca_dso = NULL;
return 1;
}
static int ibmca_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f) ())
{
int initialised = ((ibmca_dso == NULL) ? 0 : 1);
switch (cmd) {
case IBMCA_CMD_SO_PATH:
if (p == NULL) {
IBMCAerr(IBMCA_F_IBMCA_CTRL, ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
if (initialised) {
IBMCAerr(IBMCA_F_IBMCA_CTRL, IBMCA_R_ALREADY_LOADED);
return 0;
}
IBMCA_LIBNAME = (const char *)p;
return 1;
default:
break;
}
IBMCAerr(IBMCA_F_IBMCA_CTRL, IBMCA_R_CTRL_COMMAND_NOT_IMPLEMENTED);
return 0;
}
static int ibmca_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
* Ibmca 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 *argument = NULL;
BIGNUM *result = NULL;
BIGNUM *key = NULL;
int to_return;
int inLen, outLen, tmpLen;
ICA_KEY_RSA_MODEXPO *publKey = NULL;
unsigned int rc;
to_return = 0; /* expect failure */
if (!ibmca_dso) {
IBMCAerr(IBMCA_F_IBMCA_MOD_EXP, IBMCA_R_NOT_LOADED);
goto err;
}
/* Prepare the params */
BN_CTX_start(ctx);
argument = BN_CTX_get(ctx);
result = BN_CTX_get(ctx);
key = BN_CTX_get(ctx);
if (!argument || !result || !key) {
IBMCAerr(IBMCA_F_IBMCA_MOD_EXP, IBMCA_R_BN_CTX_FULL);
goto err;
}
if (!bn_wexpand(argument, m->top) || !bn_wexpand(result, m->top) ||
!bn_wexpand(key, sizeof(*publKey) / BN_BYTES)) {
IBMCAerr(IBMCA_F_IBMCA_MOD_EXP, IBMCA_R_BN_EXPAND_FAIL);
goto err;
}
publKey = (ICA_KEY_RSA_MODEXPO *)key->d;
if (publKey == NULL) {
goto err;
}
memset(publKey, 0, sizeof(*publKey));
publKey->keyType = CORRECT_ENDIANNESS(ME_KEY_TYPE);
publKey->keyLength = CORRECT_ENDIANNESS(sizeof(ICA_KEY_RSA_MODEXPO));
publKey->expOffset = (char *)publKey->keyRecord - (char *)publKey;
/*
* A quirk of the card: the exponent length has to be the same as the
* modulus (key) length
*/
outLen = BN_num_bytes(m);
/* check for modulus length SAB*/
if (outLen > 256) {
IBMCAerr(IBMCA_F_IBMCA_MOD_EXP, IBMCA_R_MEXP_LENGTH_TO_LARGE);
goto err;
}
/* check for modulus length SAB*/
publKey->expLength = publKey->nLength = outLen;
/*
* SAB Check for underflow condition the size of the exponent is less
* than the size of the parameter then we have a big problem and will
* underflow the keyRecord buffer. Bad stuff could happen then
*/
if (outLen < BN_num_bytes(p)) {
IBMCAerr(IBMCA_F_IBMCA_MOD_EXP, IBMCA_R_UNDERFLOW_KEYRECORD);
goto err;
}
/* SAB End check for underflow */
BN_bn2bin(p, &publKey->keyRecord[publKey->expLength - BN_num_bytes(p)]);
BN_bn2bin(m, &publKey->keyRecord[publKey->expLength]);
publKey->modulusBitLength = CORRECT_ENDIANNESS(publKey->nLength * 8);
publKey->nOffset = CORRECT_ENDIANNESS(publKey->expOffset +
publKey->expLength);
publKey->expOffset = CORRECT_ENDIANNESS((char *)publKey->keyRecord -
(char *)publKey);
tmpLen = outLen;
publKey->expLength = publKey->nLength = CORRECT_ENDIANNESS(tmpLen);
/* Prepare the argument */
memset(argument->d, 0, outLen);
BN_bn2bin(a, (unsigned char *)argument->d + outLen - BN_num_bytes(a));
inLen = outLen;
/* Perform the operation */
if ((rc = p_icaRsaModExpo(handle, inLen, (unsigned char *)argument->d,
publKey, &outLen, (unsigned char *)result->d))
!= 0) {
printf("rc = %d\n", rc);
IBMCAerr(IBMCA_F_IBMCA_MOD_EXP, IBMCA_R_REQUEST_FAILED);
goto err;
}
/* Convert the response */
BN_bin2bn((unsigned char *)result->d, outLen, r);
to_return = 1;
err:
BN_CTX_end(ctx);
return to_return;
}
# ifndef OPENSSL_NO_RSA
static int ibmca_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) {
if (!rsa->d || !rsa->n) {
IBMCAerr(IBMCA_F_IBMCA_RSA_MOD_EXP,
IBMCA_R_MISSING_KEY_COMPONENTS);
goto err;
}
to_return = ibmca_mod_exp(r0, I, rsa->d, rsa->n, ctx);
} else {
to_return = ibmca_mod_exp_crt(r0, I, rsa->p, rsa->q, rsa->dmp1,
rsa->dmq1, rsa->iqmp, ctx);
}
err:
BN_CTX_free(ctx);
return to_return;
}
# endif
/* Ein kleines chinesisches "Restessen" */
static int ibmca_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)
{
BIGNUM *argument = NULL;
BIGNUM *result = NULL;
BIGNUM *key = NULL;
int to_return = 0; /* expect failure */
char *pkey = NULL;
ICA_KEY_RSA_CRT *privKey = NULL;
int inLen, outLen;
int rc;
unsigned int offset, pSize, qSize;
/* SAB New variables */
unsigned int keyRecordSize;
unsigned int pbytes = BN_num_bytes(p);
unsigned int qbytes = BN_num_bytes(q);
unsigned int dmp1bytes = BN_num_bytes(dmp1);
unsigned int dmq1bytes = BN_num_bytes(dmq1);
unsigned int iqmpbytes = BN_num_bytes(iqmp);
/* Prepare the params */
BN_CTX_start(ctx);
argument = BN_CTX_get(ctx);
result = BN_CTX_get(ctx);
key = BN_CTX_get(ctx);
if (!argument || !result || !key) {
IBMCAerr(IBMCA_F_IBMCA_MOD_EXP_CRT, IBMCA_R_BN_CTX_FULL);
goto err;
}
if (!bn_wexpand(argument, p->top + q->top) ||
!bn_wexpand(result, p->top + q->top) ||
!bn_wexpand(key, sizeof(*privKey) / BN_BYTES)) {
IBMCAerr(IBMCA_F_IBMCA_MOD_EXP_CRT, IBMCA_R_BN_EXPAND_FAIL);
goto err;
}
privKey = (ICA_KEY_RSA_CRT *)key->d;
/*
* SAB Add check for total size in bytes of the parms does not exceed the
* buffer space we have do this first
*/
keyRecordSize = pbytes + qbytes + dmp1bytes + dmq1bytes + iqmpbytes;
if (keyRecordSize > sizeof(privKey->keyRecord)) {
IBMCAerr(IBMCA_F_IBMCA_MOD_EXP_CRT, IBMCA_R_OPERANDS_TO_LARGE);
goto err;
}
if ((qbytes + dmq1bytes) > 256) {
IBMCAerr(IBMCA_F_IBMCA_MOD_EXP_CRT, IBMCA_R_OPERANDS_TO_LARGE);
goto err;
}
if (pbytes + dmp1bytes > 256) {
IBMCAerr(IBMCA_F_IBMCA_MOD_EXP_CRT, IBMCA_R_OPERANDS_TO_LARGE);
goto err;
}
/* end SAB additions */
memset(privKey, 0, sizeof(*privKey));
privKey->keyType = CORRECT_ENDIANNESS(CRT_KEY_TYPE);
privKey->keyLength = CORRECT_ENDIANNESS(sizeof(ICA_KEY_RSA_CRT));
privKey->modulusBitLength = CORRECT_ENDIANNESS(BN_num_bytes(q) * 2 * 8);
/*
* p,dp & qInv are 1 QWORD Larger
*/
privKey->pLength = CORRECT_ENDIANNESS(BN_num_bytes(p) + 8);
privKey->qLength = CORRECT_ENDIANNESS(BN_num_bytes(q));
privKey->dpLength = CORRECT_ENDIANNESS(BN_num_bytes(dmp1) + 8);
privKey->dqLength = CORRECT_ENDIANNESS(BN_num_bytes(dmq1));
privKey->qInvLength = CORRECT_ENDIANNESS(BN_num_bytes(iqmp) + 8);
offset = (char *)privKey->keyRecord - (char *)privKey;
qSize = BN_num_bytes(q);
pSize = qSize + 8; /* 1 QWORD larger */
/*
* SAB probably aittle redundant, but we'll verify that each of the
* components which make up a key record sent ot the card does not exceed
* the space that is allocated for it. this handles the case where even
* if the total length does not exceed keyrecord zied, if the operands are
* funny sized they could cause potential side affects on either the card
* or the result
*/
if ((pbytes > pSize) || (dmp1bytes > pSize) ||
(iqmpbytes > pSize) || (qbytes > qSize) || (dmq1bytes > qSize)) {
IBMCAerr(IBMCA_F_IBMCA_MOD_EXP_CRT, IBMCA_R_OPERANDS_TO_LARGE);
goto err;
}
privKey->dpOffset = CORRECT_ENDIANNESS(offset);
offset += pSize;
privKey->dqOffset = CORRECT_ENDIANNESS(offset);
offset += qSize;
privKey->pOffset = CORRECT_ENDIANNESS(offset);
offset += pSize;
privKey->qOffset = CORRECT_ENDIANNESS(offset);
offset += qSize;
privKey->qInvOffset = CORRECT_ENDIANNESS(offset);
pkey = (char *)privKey->keyRecord;
/* SAB first check that we don;t under flow the buffer */
if (pSize < pbytes) {
IBMCAerr(IBMCA_F_IBMCA_MOD_EXP_CRT, IBMCA_R_UNDERFLOW_CONDITION);
goto err;
}
/* pkey += pSize - BN_num_bytes(p); WROING this should be dmp1) */
pkey += pSize - BN_num_bytes(dmp1);
BN_bn2bin(dmp1, pkey);
pkey += BN_num_bytes(dmp1); /* move the pointer */
BN_bn2bin(dmq1, pkey); /* Copy over dmq1 */
pkey += qSize; /* move pointer */
/* set up for zero padding of next field */
pkey += pSize - BN_num_bytes(p);
BN_bn2bin(p, pkey);
/* increment pointer by number of bytes moved */
pkey += BN_num_bytes(p);
BN_bn2bin(q, pkey);
pkey += qSize; /* move the pointer */
pkey += pSize - BN_num_bytes(iqmp); /* Adjust for padding */
BN_bn2bin(iqmp, pkey);
/* Prepare the argument and response */
/*
* Correct endianess is used because the fields were converted above
*/
outLen = CORRECT_ENDIANNESS(privKey->qLength) * 2;
if (outLen > 256) {
IBMCAerr(IBMCA_F_IBMCA_MOD_EXP_CRT, IBMCA_R_OUTLEN_TO_LARGE);
goto err;
}
/* SAB check for underflow here on the argeument */
if (outLen < BN_num_bytes(a)) {
IBMCAerr(IBMCA_F_IBMCA_MOD_EXP_CRT, IBMCA_R_UNDERFLOW_CONDITION);
goto err;
}
BN_bn2bin(a, (unsigned char *)argument->d + outLen - BN_num_bytes(a));
inLen = outLen;
memset(result->d, 0, outLen);
/* Perform the operation */
if ((rc = p_icaRsaCrt(handle, inLen, (unsigned char *)argument->d,
privKey, &outLen, (unsigned char *)result->d)) != 0)
{
printf("rc = %d\n", rc);
IBMCAerr(IBMCA_F_IBMCA_MOD_EXP_CRT, IBMCA_R_REQUEST_FAILED);
goto err;
}
/* Convert the response */
BN_bin2bn((unsigned char *)result->d, outLen, r);
to_return = 1;
err:
BN_CTX_end(ctx);
return to_return;
}
# 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 Ibmca acceleration (it
* doesn't have a CRT form for RSA), this function means that an Ibmca 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
* ibmca dsa1024 rsa1024".
*/
static int ibmca_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 (!ibmca_mod_exp(rr, a1, p1, m, ctx))
goto end;
/* let t = a2 ^ p2 mod m */
if (!ibmca_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 ibmca_mod_exp_dsa(DSA *dsa, BIGNUM *r, BIGNUM *a,
const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
BN_MONT_CTX *m_ctx)
{
return ibmca_mod_exp(r, a, p, m, ctx);
}
# endif
/* This function is aliased to mod_exp (with the mont stuff dropped). */
static int ibmca_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx,
BN_MONT_CTX *m_ctx)
{
return ibmca_mod_exp(r, a, p, m, ctx);
}
# ifndef OPENSSL_NO_DH
/* This function is aliased to mod_exp (with the dh and mont dropped). */
static int ibmca_mod_exp_dh(DH const *dh, BIGNUM *r,
const BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
{
return ibmca_mod_exp(r, a, p, m, ctx);
}
# endif
/* Random bytes are good */
static int ibmca_rand_bytes(unsigned char *buf, int num)
{
int to_return = 0; /* assume failure */
unsigned int ret;
if (handle == 0) {
IBMCAerr(IBMCA_F_IBMCA_RAND_BYTES, IBMCA_R_NOT_INITIALISED);
goto err;
}
ret = p_icaRandomNumberGenerate(handle, num, buf);
if (ret < 0) {
IBMCAerr(IBMCA_F_IBMCA_RAND_BYTES, IBMCA_R_REQUEST_FAILED);
goto err;
}
to_return = 1;
err:
return to_return;
}
static int ibmca_rand_status(void)
{
return 1;
}
/*
* This stuff is needed if this ENGINE is being compiled into a
* self-contained shared-library.
*/
# ifdef ENGINE_DYNAMIC_SUPPORT
static int bind_fn(ENGINE *e, const char *id)
{
if (id && (strcmp(id, engine_ibmca_id) != 0)) /* WJH XXX */
return 0;
if (!bind_helper(e))
return 0;
return 1;
}
IMPLEMENT_DYNAMIC_CHECK_FN()
IMPLEMENT_DYNAMIC_BIND_FN(bind_fn)
# endif /* ENGINE_DYNAMIC_SUPPORT */
# endif /* !OPENSSL_NO_HW_IBMCA */
#endif /* !OPENSSL_NO_HW */