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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 <time.h>
#include "pki.h"
#include <utils/linked_list.h>
#include <credentials/certificates/certificate.h>
#include <credentials/certificates/x509.h>
/**
* Create a self signed certificate.
*/
static int self()
{
key_type_t type = KEY_RSA;
hash_algorithm_t digest = HASH_SHA1;
certificate_t *cert = NULL;
private_key_t *private = NULL;
public_key_t *public = NULL;
char *file = NULL, *dn = NULL, *hex = NULL, *error = NULL;
identification_t *id = NULL;
linked_list_t *san, *ocsp;
int lifetime = 1080;
int pathlen = X509_NO_PATH_LEN_CONSTRAINT;
chunk_t serial = chunk_empty;
chunk_t encoding = chunk_empty;
time_t not_before, not_after;
x509_flag_t flags = 0;
char *arg;
san = linked_list_create();
ocsp = linked_list_create();
while (TRUE)
{
switch (command_getopt(&arg))
{
case 'h':
goto usage;
case 't':
if (streq(arg, "rsa"))
{
type = KEY_RSA;
}
else if (streq(arg, "ecdsa"))
{
type = KEY_ECDSA;
}
else
{
error = "invalid input type";
goto usage;
}
continue;
case 'g':
digest = get_digest(arg);
if (digest == HASH_UNKNOWN)
{
error = "invalid --digest type";
goto usage;
}
continue;
case 'i':
file = arg;
continue;
case 'd':
dn = arg;
continue;
case 'a':
san->insert_last(san, identification_create_from_string(arg));
continue;
case 'l':
lifetime = atoi(arg);
if (!lifetime)
{
error = "invalid --lifetime value";
goto usage;
}
continue;
case 's':
hex = arg;
continue;
case 'b':
flags |= X509_CA;
continue;
case 'p':
pathlen = atoi(arg);
continue;
case 'o':
ocsp->insert_last(ocsp, arg);
continue;
case EOF:
break;
default:
error = "invalid --self option";
goto usage;
}
break;
}
if (!dn)
{
error = "--dn is required";
goto usage;
}
id = identification_create_from_string(dn);
if (id->get_type(id) != ID_DER_ASN1_DN)
{
error = "supplied --dn is not a distinguished name";
goto end;
}
if (file)
{
private = lib->creds->create(lib->creds, CRED_PRIVATE_KEY, type,
BUILD_FROM_FILE, file, BUILD_END);
}
else
{
private = lib->creds->create(lib->creds, CRED_PRIVATE_KEY, type,
BUILD_FROM_FD, 0, BUILD_END);
}
if (!private)
{
error = "parsing private key failed";
goto end;
}
public = private->get_public_key(private);
if (!public)
{
error = "extracting public key failed";
goto end;
}
if (hex)
{
serial = chunk_from_hex(chunk_create(hex, strlen(hex)), NULL);
}
else
{
rng_t *rng = lib->crypto->create_rng(lib->crypto, RNG_WEAK);
if (!rng)
{
error = "no random number generator found";
goto end;
}
rng->allocate_bytes(rng, 8, &serial);
rng->destroy(rng);
}
not_before = time(NULL);
not_after = not_before + lifetime * 24 * 60 * 60;
cert = lib->creds->create(lib->creds, CRED_CERTIFICATE, CERT_X509,
BUILD_SIGNING_KEY, private, BUILD_PUBLIC_KEY, public,
BUILD_SUBJECT, id, BUILD_NOT_BEFORE_TIME, not_before,
BUILD_NOT_AFTER_TIME, not_after, BUILD_SERIAL, serial,
BUILD_DIGEST_ALG, digest, BUILD_X509_FLAG, flags,
BUILD_PATHLEN, pathlen, BUILD_SUBJECT_ALTNAMES, san,
BUILD_OCSP_ACCESS_LOCATIONS, ocsp, BUILD_END);
if (!cert)
{
error = "generating certificate failed";
goto end;
}
encoding = cert->get_encoding(cert);
if (!encoding.ptr)
{
error = "encoding certificate failed";
goto end;
}
if (fwrite(encoding.ptr, encoding.len, 1, stdout) != 1)
{
error = "writing certificate key failed";
goto end;
}
end:
DESTROY_IF(id);
DESTROY_IF(cert);
DESTROY_IF(public);
DESTROY_IF(private);
san->destroy_offset(san, offsetof(identification_t, destroy));
ocsp->destroy(ocsp);
free(encoding.ptr);
free(serial.ptr);
if (error)
{
fprintf(stderr, "%s\n", error);
return 1;
}
return 0;
usage:
san->destroy_offset(san, offsetof(identification_t, destroy));
ocsp->destroy(ocsp);
return command_usage(error);
}
/**
* Register the command.
*/
static void __attribute__ ((constructor))reg()
{
command_register((command_t) {
self, 's', "self",
"create a self signed certificate",
{"[--in file] [--type rsa|ecdsa]",
" --dn distinguished-name [--san subjectAltName]+",
"[--lifetime days] [--serial hex] [--ca] [--ocsp uri]+",
"[--digest md5|sha1|sha224|sha256|sha384|sha512]"},
{
{"help", 'h', 0, "show usage information"},
{"in", 'i', 1, "private key input file, default: stdin"},
{"type", 't', 1, "type of input key, default: rsa"},
{"dn", 'd', 1, "subject and issuer distinguished name"},
{"san", 'a', 1, "subjectAltName to include in certificate"},
{"lifetime",'l', 1, "days the certificate is valid, default: 1080"},
{"serial", 's', 1, "serial number in hex, default: random"},
{"ca", 'b', 0, "include CA basicConstraint, default: no"},
{"pathlen", 'p', 1, "set path length constraint"},
{"ocsp", 'o', 1, "OCSP AuthorityInfoAccess URI to include"},
{"digest", 'g', 1, "digest for signature creation, default: sha1"},
}
});
}
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