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/*
* Copyright (C) 2009 Martin Willi
* Hochschule fuer Technik Rapperswil
*
* 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 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* 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.
*/
#include "pki.h"
#include <credentials/certificates/certificate.h>
#include <credentials/certificates/x509.h>
/**
* Verify a certificate signature
*/
static int verify()
{
certificate_t *cert, *ca;
char *file = NULL, *cafile = NULL;
bool good = FALSE;
char *arg;
while (TRUE)
{
switch (command_getopt(&arg))
{
case 'h':
return command_usage(NULL);
case 'i':
file = arg;
continue;
case 'c':
cafile = arg;
continue;
case EOF:
break;
default:
return command_usage("invalid --verify option");
}
break;
}
if (file)
{
cert = lib->creds->create(lib->creds, CRED_CERTIFICATE, CERT_X509,
BUILD_FROM_FILE, file, BUILD_END);
}
else
{
cert = lib->creds->create(lib->creds, CRED_CERTIFICATE, CERT_X509,
BUILD_FROM_FD, 0, BUILD_END);
}
if (!cert)
{
fprintf(stderr, "parsing certificate failed\n");
return 1;
}
if (cafile)
{
ca = lib->creds->create(lib->creds, CRED_CERTIFICATE, CERT_X509,
BUILD_FROM_FILE, cafile, BUILD_END);
if (!ca)
{
fprintf(stderr, "parsing CA certificate failed\n");
return 1;
}
}
else
{
ca = cert;
}
if (cert->issued_by(cert, ca))
{
if (cert->get_validity(cert, NULL, NULL, NULL))
{
if (cafile)
{
if (ca->get_validity(ca, NULL, NULL, NULL))
{
printf("signature good, certificates valid\n");
good = TRUE;
}
else
{
printf("signature good, CA certificates not valid now\n");
}
}
else
{
printf("signature good, certificate valid\n");
good = TRUE;
}
}
else
{
printf("certificate not valid now\n");
}
}
else
{
printf("signature invalid\n");
}
if (cafile)
{
ca->destroy(ca);
}
cert->destroy(cert);
return good ? 0 : 2;
}
/**
* Register the command.
*/
static void __attribute__ ((constructor))reg()
{
command_register((command_t) {
verify, 'v', "verify",
"verify a certificate using the CA certificate",
{"[--in file] [--ca file]"},
{
{"help", 'h', 0, "show usage information"},
{"in", 'i', 1, "X.509 certificate to verify, default: stdin"},
{"cacert", 'c', 1, "CA certificate, default: verify self signed"},
}
});
}
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