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/********************************************************************************/
/* */
/* TPM public key TPM2B_PUBLIC to TPM2B_ECC_POINT */
/* Written by Ken Goldman */
/* IBM Thomas J. Watson Research Center */
/* */
/* (c) Copyright IBM Corporation 2017 - 2019 */
/* */
/* 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <ibmtss/tsserror.h>
#include <ibmtss/tssutils.h>
#include <ibmtss/tssresponsecode.h>
#include <ibmtss/Unmarshal_fp.h>
#include <ibmtss/tssmarshal.h>
static void printUsage(void);
extern int tssUtilsVerbose;
int main(int argc, char *argv[])
{
TPM_RC rc = 0;
int i; /* argc iterator */
const char *publicKeyFilename = NULL;
const char *pointFilename = NULL;
TPM2B_PUBLIC public;
TPM2B_ECC_POINT eccPoint2b;
tssUtilsVerbose = FALSE;
for (i=1 ; (i<argc) && (rc == 0) ; i++) {
if (strcmp(argv[i],"-ipu") == 0) {
i++;
if (i < argc) {
publicKeyFilename = argv[i];
}
else {
printf("-ipu option needs a value\n");
printUsage();
}
}
else if (strcmp(argv[i],"-pt") == 0) {
i++;
if (i < argc) {
pointFilename = argv[i];
}
else {
printf("-pt option needs a value\n");
printUsage();
}
}
else if (strcmp(argv[i],"-h") == 0) {
printUsage();
}
else if (strcmp(argv[i],"-v") == 0) {
tssUtilsVerbose = TRUE;
}
else {
printf("\n%s is not a valid option\n", argv[i]);
printUsage();
}
}
if (publicKeyFilename == NULL) {
printf("Missing public key parameter -ipu\n");
printUsage();
}
if (pointFilename == NULL) {
printf("Missing point file name parameter -pt\n");
printUsage();
}
/* read the TPM public key to a structure */
if (rc == 0) {
rc = TSS_File_ReadStructureFlag(&public,
(UnmarshalFunctionFlag_t)TSS_TPM2B_PUBLIC_Unmarshalu,
TRUE, /* NULL permitted */
publicKeyFilename);
}
if (rc == 0) {
if (public.publicArea.type != TPM_ALG_ECC) {
printf("Public key parameter -ipu type %04x is not TPM_ALG_ECC\n",
public.publicArea.type);
printUsage();
}
}
if (rc == 0) {
/* copy the TPMS_ECC_POINT */
eccPoint2b.point = public.publicArea.unique.ecc;
/* TSS_TPM2B_ECC_POINT_Marshal() fills in the redundant TPM2B_ECC_POINT size */
rc = TSS_File_WriteStructure(&eccPoint2b,
(MarshalFunction_t)TSS_TPM2B_ECC_POINT_Marshalu,
pointFilename);
}
if (rc == 0) {
if (tssUtilsVerbose) printf("tpmpublic2eccpoint: success\n");
}
else {
const char *msg;
const char *submsg;
const char *num;
printf("tpmpublic2eccpoint: failed, rc %08x\n", rc);
TSS_ResponseCode_toString(&msg, &submsg, &num, rc);
printf("%s%s%s\n", msg, submsg, num);
rc = EXIT_FAILURE;
}
return rc;
}
static void printUsage(void)
{
printf("\n");
printf("tpmpublic2eccpoint\n");
printf("\n");
printf("Converts an EC TPM2B_PUBLIC to TPM2B_ECC_POINT. The intended use case\n");
printf("is to convert the public key output of certain commands (TPM2_CreatePrimary,\n");
printf("TPM2_Create, TPM2_CreateLoaded, TPM2_ReadPublic) to a format useful for\n");
printf("TPM2_ZGen_2Phase.\n");
printf("\n");
printf("\t-ipu\tEC public key input file in TPM TPM2B_PUBLIC format\n");
printf("\t-pt\tEC public key output file in TPM TPM2B_ECC_POINT format\n");
exit(1);
}
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