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/********************************************************************************/
/* */
/* OpenSSL helper functions */
/* Written by Stefan Berger */
/* IBM Thomas J. Watson Research Center */
/* */
/* (c) Copyright IBM Corporation 2020. */
/* */
/* All rights reserved. */
/* */
/* Redistribution and use in source and binary forms, with or without */
/* modification, are permitted provided that the following conditions are */
/* met: */
/* */
/* Redistributions of source code must retain the above copyright notice, */
/* this list of conditions and the following disclaimer. */
/* */
/* 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. */
/* */
/* Neither the names of the IBM Corporation nor the names of its */
/* contributors may be used to endorse or promote products derived from */
/* this software without specific prior written permission. */
/* */
/* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS */
/* "AS IS" AND ANY EXPRESS 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 COPYRIGHT */
/* HOLDER OR 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. */
/********************************************************************************/
#include <openssl/evp.h>
#include <openssl/rsa.h>
#include <openssl/bn.h>
#include "tpm_debug.h"
#include "tpm_error.h"
#include "tpm_openssl_helpers.h"
#include "tpm_crypto.h"
#if USE_OPENSSL_FUNCTIONS_RSA
TPM_RESULT TPM_RSAGenerateEVP_PKEY(EVP_PKEY **pkey, /* out: pkey */
unsigned char *narr, /* public modulus */
uint32_t nbytes,
unsigned char *earr, /* public exponent */
uint32_t ebytes,
unsigned char *darr, /* private exponent */
uint32_t dbytes)
{
TPM_RESULT rc = 0;
int irc;
BIGNUM * n = NULL;
BIGNUM * e = NULL;
BIGNUM * d = NULL;
RSA * rsakey = NULL;
/* sanity check for the free */
if (rc == 0) {
if (*pkey != NULL) {
printf("TPM_RSAGeneratePrivateToken: Error (fatal), pkey %p should be NULL\n",
*pkey);
rc = TPM_FAIL;
}
}
/* construct the OpenSSL private key object */
if (rc == 0) {
*pkey = EVP_PKEY_new(); /* freed by caller */
if (*pkey == NULL) {
printf("TPM_RSAGeneratePrivateToken: Error in EVP_PKEY_new()\n");
rc = TPM_FAIL;
}
}
if (rc == 0) {
rc = TPM_bin2bn((TPM_BIGNUM *)&n, narr, nbytes); /* freed by caller */
}
if (rc == 0) {
rc = TPM_bin2bn((TPM_BIGNUM *)&e, earr, ebytes); /* freed by caller */
}
if (rc == 0) {
if (darr != NULL) {
rc = TPM_bin2bn((TPM_BIGNUM *)&d, darr, dbytes); /* freed by caller */
}
}
if (rc == 0) {
rsakey = RSA_new();
if (rsakey == NULL) {
printf("TPM_RSAGeneratePrivateToken: Error in RSA_new()\n");
rc = TPM_FAIL;
}
}
if (rc == 0) {
irc = RSA_set0_key(rsakey, n, e, d);
if (irc != 1) {
printf("TPM_RSAGeneratePrivateToken: Error in RSA_set0_key()\n");
rc = TPM_FAIL;
} else {
n = NULL;
e = NULL;
d = NULL;
}
}
if (rc == 0) {
RSA_set_flags(rsakey, RSA_FLAG_NO_BLINDING);
irc = EVP_PKEY_assign_RSA(*pkey, rsakey);
if (irc == 0) {
printf("TPM_RSAGeneratePrivateToken: Error in EVP_PKEY_assign_RSA()\n");
rc = TPM_FAIL;
} else {
rsakey = NULL;
}
}
if (rc != 0) {
EVP_PKEY_free(*pkey);
*pkey = NULL;
RSA_free(rsakey);
BN_free(n);
BN_free(e);
BN_clear_free(d);
}
return rc;
}
#endif
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