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/*
* Copyright (C) 2009 Martin Willi
* Copyright (C) 2009 Andreas Steffen
*
* HSR 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 <errno.h>
#include "pki.h"
#include <collections/linked_list.h>
#include <credentials/certificates/certificate.h>
/**
* Create a self-signed PKCS#10 certificate requesst.
*/
static int req()
{
cred_encoding_type_t form = CERT_ASN1_DER;
key_type_t type = KEY_RSA;
hash_algorithm_t digest = HASH_SHA1;
certificate_t *cert = NULL;
private_key_t *private = NULL;
char *file = NULL, *dn = NULL, *error = NULL;
identification_t *id = NULL;
linked_list_t *san;
chunk_t encoding = chunk_empty;
chunk_t challenge_password = chunk_empty;
char *arg;
san = 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 = enum_from_name(hash_algorithm_short_names, arg);
if (digest == -1)
{
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 'p':
challenge_password = chunk_create(arg, strlen(arg));
continue;
case 'f':
if (!get_form(arg, &form, CRED_CERTIFICATE))
{
error = "invalid output format";
goto usage;
}
continue;
case EOF:
break;
default:
error = "invalid --req 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
{
chunk_t chunk;
if (!chunk_from_fd(0, &chunk))
{
fprintf(stderr, "reading private key failed: %s\n", strerror(errno));
error = "";
goto end;
}
private = lib->creds->create(lib->creds, CRED_PRIVATE_KEY, type,
BUILD_BLOB, chunk, BUILD_END);
free(chunk.ptr);
}
if (!private)
{
error = "parsing private key failed";
goto end;
}
cert = lib->creds->create(lib->creds, CRED_CERTIFICATE, CERT_PKCS10_REQUEST,
BUILD_SIGNING_KEY, private,
BUILD_SUBJECT, id,
BUILD_SUBJECT_ALTNAMES, san,
BUILD_CHALLENGE_PWD, challenge_password,
BUILD_DIGEST_ALG, digest,
BUILD_END);
if (!cert)
{
error = "generating certificate request failed";
goto end;
}
if (!cert->get_encoding(cert, form, &encoding))
{
error = "encoding certificate request failed";
goto end;
}
if (fwrite(encoding.ptr, encoding.len, 1, stdout) != 1)
{
error = "writing certificate request failed";
goto end;
}
end:
DESTROY_IF(id);
DESTROY_IF(cert);
DESTROY_IF(private);
san->destroy_offset(san, offsetof(identification_t, destroy));
free(encoding.ptr);
if (error)
{
fprintf(stderr, "%s\n", error);
return 1;
}
return 0;
usage:
san->destroy_offset(san, offsetof(identification_t, destroy));
return command_usage(error);
}
/**
* Register the command.
*/
static void __attribute__ ((constructor))reg()
{
command_register((command_t) {
req, 'r', "req",
"create a PKCS#10 certificate request",
{" [--in file] [--type rsa|ecdsa] --dn distinguished-name",
"[--san subjectAltName]+ [--password challengePassword]",
"[--digest md5|sha1|sha224|sha256|sha384|sha512] [--outform der|pem]"},
{
{"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 distinguished name"},
{"san", 'a', 1, "subjectAltName to include in cert request"},
{"password",'p', 1, "challengePassword to include in cert request"},
{"digest", 'g', 1, "digest for signature creation, default: sha1"},
{"outform", 'f', 1, "encoding of generated request, default: der"},
}
});
}
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