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/*
* Copyright (C) 2019 Anderson Toshiyuki Sasaki
* Copyright (C) 2019 Red Hat, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
/* this code extensively uses deprecated features, so warnings are useless */
#define OPENSSL_SUPPRESS_DEPRECATED
#include <openssl/engine.h>
#include <openssl/conf.h>
#include <openssl/evp.h>
#include <openssl/x509.h>
#include <openssl/pem.h>
#include <openssl/err.h>
#ifndef OPENSSL_NO_ENGINE
static void usage(char *argv[])
{
fprintf(stderr, "%s [certificate (PEM or URL)] [private key URL] "
"[module] [conf]\n", argv[0]);
}
static void display_openssl_errors(int l)
{
const char *file;
char buf[120];
int e, line;
if (ERR_peek_error() == 0)
return;
fprintf(stderr, "At main.c:%d:\n", l);
while ((e = ERR_get_error_line(&file, &line))) {
ERR_error_string(e, buf);
fprintf(stderr, "- SSL %s: %s:%d\n", buf, file, line);
}
}
int main(int argc, char *argv[])
{
ENGINE *engine = NULL;
EVP_PKEY *pkey = NULL;
X509 *cert = NULL;
FILE *cert_fp = NULL;
const char *module, *efile, *certfile, *privkey;
int ret = 0;
struct {
const char *cert_id;
X509 *cert;
} params = {0};
if (argc < 4){
printf("Too few arguments\n");
usage(argv);
return 1;
}
certfile = argv[1];
privkey = argv[2];
module = argv[3];
efile = argv[4];
ret = CONF_modules_load_file(efile, "engines", 0);
if (ret <= 0) {
fprintf(stderr, "cannot load %s\n", efile);
display_openssl_errors(__LINE__);
exit(1);
}
ENGINE_add_conf_module();
#if OPENSSL_VERSION_NUMBER>=0x10100000
OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_CIPHERS \
| OPENSSL_INIT_ADD_ALL_DIGESTS \
| OPENSSL_INIT_LOAD_CONFIG, NULL);
#else
OpenSSL_add_all_algorithms();
OpenSSL_add_all_digests();
ERR_load_crypto_strings();
#endif
ERR_clear_error();
ENGINE_load_builtin_engines();
engine = ENGINE_by_id("pkcs11");
if (engine == NULL) {
printf("Could not get engine\n");
display_openssl_errors(__LINE__);
ret = 1;
goto end;
}
if (!ENGINE_ctrl_cmd_string(engine, "DEBUG_LEVEL", "7", 0)) {
display_openssl_errors(__LINE__);
exit(1);
}
if (!ENGINE_ctrl_cmd_string(engine, "MODULE_PATH", module, 0)) {
display_openssl_errors(__LINE__);
exit(1);
}
if (!ENGINE_init(engine)) {
printf("Could not initialize engine\n");
display_openssl_errors(__LINE__);
ret = 1;
goto end;
}
/*
* ENGINE_init() returned a functional reference, so free the structural
* reference from ENGINE_by_id().
*/
ENGINE_free(engine);
if (!strncmp(certfile, "pkcs11:", 7)) {
params.cert_id = certfile;
if (!ENGINE_ctrl_cmd(engine, "LOAD_CERT_CTRL", 0, ¶ms, NULL, 1)) {
fprintf(stderr, "Could not get certificate %s\n", certfile);
ret = 1;
goto end;
}
cert = params.cert;
} else {
cert_fp = fopen(certfile, "rb");
if (!cert_fp) {
fprintf(stderr, "Could not open file %s\n", certfile);
ret = 1;
goto end;
}
cert = PEM_read_X509(cert_fp, NULL, NULL, NULL);
if (!cert) {
fprintf(stderr, "Could not read certificate file"
"(must be PEM format)\n");
}
if (cert_fp) {
fclose(cert_fp);
}
}
pkey = ENGINE_load_private_key(engine, privkey, 0, 0);
if (pkey == NULL) {
printf("Could not load key\n");
display_openssl_errors(__LINE__);
ret = 1;
goto end;
}
/* Free the functional reference from ENGINE_init */
ENGINE_finish(engine);
if (!X509_check_private_key(cert, pkey)) {
printf("Could not check private key\n");
display_openssl_errors(__LINE__);
EVP_PKEY_free(pkey);
ret = 1;
goto end;
}
EVP_PKEY_free(pkey);
printf("Key and certificate matched\n");
ret = 0;
CONF_modules_unload(1);
end:
X509_free(cert);
return ret;
}
#else /* OPENSSL_NO_ENGINE */
#include <stdio.h>
int main() {
fprintf(stderr, "Skipped: ENGINE support not available\n");
return 77;
}
#endif /* OPENSSL_NO_ENGINE */
/* vim: set noexpandtab: */
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