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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.
*/
#define _GNU_SOURCE
#include "command.h"
#include "pki.h"
#include <time.h>
#include <unistd.h>
#include <utils/debug.h>
#include <credentials/sets/callback_cred.h>
/**
* Convert a form string to a encoding type
*/
bool get_form(char *form, cred_encoding_type_t *enc, credential_type_t type)
{
if (streq(form, "der"))
{
switch (type)
{
case CRED_CERTIFICATE:
*enc = CERT_ASN1_DER;
return TRUE;
case CRED_PRIVATE_KEY:
*enc = PRIVKEY_ASN1_DER;
return TRUE;
case CRED_PUBLIC_KEY:
/* der encoded keys usually contain the complete
* SubjectPublicKeyInfo */
*enc = PUBKEY_SPKI_ASN1_DER;
return TRUE;
default:
return FALSE;
}
}
else if (streq(form, "pem"))
{
switch (type)
{
case CRED_CERTIFICATE:
*enc = CERT_PEM;
return TRUE;
case CRED_PRIVATE_KEY:
*enc = PRIVKEY_PEM;
return TRUE;
case CRED_PUBLIC_KEY:
*enc = PUBKEY_PEM;
return TRUE;
default:
return FALSE;
}
}
else if (streq(form, "pgp"))
{
switch (type)
{
case CRED_PRIVATE_KEY:
*enc = PRIVKEY_PGP;
return TRUE;
case CRED_PUBLIC_KEY:
*enc = PUBKEY_PGP;
return TRUE;
default:
return FALSE;
}
}
else if (streq(form, "dnskey"))
{
switch (type)
{
case CRED_PUBLIC_KEY:
*enc = PUBKEY_DNSKEY;
return TRUE;
default:
return FALSE;
}
}
else if (streq(form, "sshkey"))
{
switch (type)
{
case CRED_PUBLIC_KEY:
*enc = PUBKEY_SSHKEY;
return TRUE;
default:
return FALSE;
}
}
return FALSE;
}
/**
* See header
*/
bool calculate_lifetime(char *format, char *nbstr, char *nastr, time_t span,
time_t *nb, time_t *na)
{
struct tm tm;
time_t now;
char *end;
if (!format)
{
format = "%d.%m.%y %T";
}
now = time(NULL);
localtime_r(&now, &tm);
if (nbstr)
{
end = strptime(nbstr, format, &tm);
if (end == NULL || *end != '\0')
{
return FALSE;
}
}
*nb = mktime(&tm);
localtime_r(&now, &tm);
if (nastr)
{
end = strptime(nastr, format, &tm);
if (end == NULL || *end != '\0')
{
return FALSE;
}
}
*na = mktime(&tm);
if (!nbstr && nastr)
{
*nb = *na - span;
}
else if (!nastr)
{
*na = *nb + span;
}
return TRUE;
}
/**
* Callback credential set pki uses
*/
static callback_cred_t *cb_set;
/**
* Callback function to receive credentials
*/
static shared_key_t* cb(void *data, shared_key_type_t type,
identification_t *me, identification_t *other,
id_match_t *match_me, id_match_t *match_other)
{
char buf[64], *label, *secret;
switch (type)
{
case SHARED_PIN:
label = "Smartcard PIN";
break;
case SHARED_PRIVATE_KEY_PASS:
label = "Private key passphrase";
break;
default:
return NULL;
}
snprintf(buf, sizeof(buf), "%s: ", label);
secret = getpass(buf);
if (secret)
{
if (match_me)
{
*match_me = ID_MATCH_PERFECT;
}
if (match_other)
{
*match_other = ID_MATCH_NONE;
}
return shared_key_create(type,
chunk_clone(chunk_create(secret, strlen(secret))));
}
return NULL;
}
/**
* Register PIN/Passphrase callback function
*/
static void add_callback()
{
cb_set = callback_cred_create_shared(cb, NULL);
lib->credmgr->add_set(lib->credmgr, &cb_set->set);
}
/**
* Unregister PIN/Passphrase callback function
*/
static void remove_callback()
{
lib->credmgr->remove_set(lib->credmgr, &cb_set->set);
cb_set->destroy(cb_set);
}
/**
* Library initialization and operation parsing
*/
int main(int argc, char *argv[])
{
atexit(library_deinit);
if (!library_init(NULL, "pki"))
{
exit(SS_RC_LIBSTRONGSWAN_INTEGRITY);
}
if (lib->integrity &&
!lib->integrity->check_file(lib->integrity, "pki", argv[0]))
{
fprintf(stderr, "integrity check of pki failed\n");
exit(SS_RC_DAEMON_INTEGRITY);
}
if (!lib->plugins->load(lib->plugins,
lib->settings->get_str(lib->settings, "pki.load", PLUGINS)))
{
exit(SS_RC_INITIALIZATION_FAILED);
}
add_callback();
atexit(remove_callback);
return command_dispatch(argc, argv);
}
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