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/* Copyright 2017 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <sys/stat.h>
#include "framework_utils.h"
#include "utils.h"
#include "cca_functions.h"
/* local prototypes */
int GetArgs(int argc,
char **argv);
void PrintUsage(void);
/* global variables */
FILE *messageFile = NULL;
int verbose = TRUE;
int debug = TRUE;
int main(int argc, char** argv)
{
int rc = 0;
FrameworkConfig frameworkConfig;
unsigned char masterAesKeyToken[CCA_KEY_IDENTIFIER_LENGTH];
unsigned char *masterAesKeyTokenOut = NULL; /* CCA key token (not the plaintext AES
key) */
size_t masterAesKeyTokenLengthOut;
unsigned char eku[AES128_SIZE]; /* password encryption key */
unsigned char aku[AKU_SIZE]; /* password authentication HMAC key */
messageFile = stdout; /* trace always goes to stdout */
FrameworkConfig_Init(&frameworkConfig); /* freed @1 */
/* get command line arguments */
if (rc == 0) {
rc = GetArgs(argc, argv);
}
/* get the framework configuration file object */
if (rc == 0) {
rc = FrameworkConfig_Parse(FALSE, /* do not need master key */
TRUE, /* validate */
&frameworkConfig);
}
/* verify that the file does not exist */
if (rc == 0) {
if (verbose) fprintf(messageFile, "Testing for key token file %s\n",
frameworkConfig.masterAesKeyTokenFilename);
if (frameworkConfig.masterAesKeyToken != NULL) {
fprintf(messageFile, "Error, File %s already exists\n",
frameworkConfig.masterAesKeyTokenFilename);
rc = ERROR_CODE;
}
}
/* generate a master key */
if (rc == 0) {
if (verbose) fprintf(messageFile, "Generating key token\n");
rc = Key_Generate(masterAesKeyToken);
}
/* write the AES key token to a file */
if (rc == 0) {
if (verbose) fprintf(messageFile, "Writing key token to %s\n",
frameworkConfig.masterAesKeyTokenFilename);
rc = File_WriteBinaryFile(masterAesKeyToken,
sizeof(masterAesKeyToken),
frameworkConfig.masterAesKeyTokenFilename);
}
/* validate that the master AES key token file can be read */
if (rc == 0) {
if (verbose) fprintf(messageFile, "Reading back key token\n");
rc = File_ReadBinaryFile(&masterAesKeyTokenOut, /* freed @5 */
&masterAesKeyTokenLengthOut,
CCA_KEY_IDENTIFIER_LENGTH,
frameworkConfig.masterAesKeyTokenFilename);
}
/* sanity check the length */
if (rc == 0) {
if (masterAesKeyTokenLengthOut != sizeof(masterAesKeyToken)) {
fprintf(messageFile, "Error reading %s - length mismatch\n",
frameworkConfig.masterAesKeyTokenFilename);
rc = ERROR_CODE;
}
}
/* sanity check the contents */
if (rc == 0) {
rc = memcmp(masterAesKeyToken, masterAesKeyTokenOut, masterAesKeyTokenLengthOut);
if (rc != 0) {
fprintf(messageFile, "Error reading %s - data mismatch\n",
frameworkConfig.masterAesKeyTokenFilename);
rc = ERROR_CODE;
}
}
/* validate that the master AES key token can be used */
if (rc == 0) {
if (verbose) fprintf(messageFile, "Using key token\n");
rc = Password_KDF(eku, /* user encryption key */
aku, /* user authentication HMAC key */
frameworkConfig.frameworkAdmins[0], /* dummy sender */
masterAesKeyToken);
}
/* cleanup */
FrameworkConfig_Delete(&frameworkConfig); /* @1 */
free(masterAesKeyTokenOut); /* @5 */
/* erase the secret keys before exit */
memset(eku, 0, AES128_SIZE);
memset(aku, 0, AKU_SIZE);
fprintf(messageFile, "\nframeworkkey_generate rc %d\n\n", rc);
return rc;
}
/* GetArgs() gets the command line arguments
Returns ERROR_CODE on error.
*/
int GetArgs(int argc,
char **argv)
{
int rc = 0;
int i;
/* command line argument defaults */
verbose = FALSE;
/* get the command line arguments */
for (i=1 ; (i<argc) && (rc == 0) ; i++) {
if (strcmp(argv[i],"-h") == 0) {
PrintUsage();
rc = ERROR_CODE;
}
else if (strcmp(argv[i],"-v") == 0) {
verbose = TRUE;
}
else {
printf("frameworkkey_generate: Error, %s is not a valid option\n", argv[i]);
PrintUsage();
rc = ERROR_CODE;
}
}
return rc;
}
void PrintUsage()
{
printf("\n");
printf("frameworkkey_generate:\n"
"\t[-v - verbose tracing]\n"
"\t[-h - print usage help]\n");
printf("\n");
printf("\n");
return;
}
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