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391 lines
9.4 KiB
391 lines
9.4 KiB
/*
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* $Id$
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*
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* TLS module - Configuration file parser
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*
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* Copyright (C) 2001-2003 FhG FOKUS
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* Copyright (C) 2004,2005 Free Software Foundation, Inc.
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* Copyright (C) 2005,2006 iptelorg GmbH
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*
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* This file is part of SIP-router, a free SIP server.
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*
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* SIP-router is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version
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*
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* SIP-router is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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/*!
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* \file
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* \brief SIP-router TLS support :: Configuration file parser
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* \ingroup tls
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* Module: \ref tls
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*/
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#include "tls_config.h"
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#include "tls_domain.h"
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#include "tls_mod.h"
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#include "tls_util.h"
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#include "../../cfg_parser.h"
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#include "../../resolve.h"
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#include "../../mem/mem.h"
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#include "../../dprint.h"
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#include "../../trim.h"
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#include "../../ut.h"
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#include "../../cfg/cfg.h"
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static tls_domains_cfg_t* cfg = NULL;
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static tls_domain_t* domain = NULL;
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#ifdef USE_IPV6
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static int parse_ipv6(struct ip_addr* ip, cfg_token_t* token,
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cfg_parser_t* st)
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{
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int ret;
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cfg_token_t t;
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struct ip_addr* ipv6;
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str ip6_str;
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ip6_str.s = t.val.s;
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while(1) {
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ret = cfg_get_token(&t, st, 0);
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if (ret != 0) goto err;
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if (t.type == ']') break;
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if (t.type != CFG_TOKEN_ALPHA && t.type != ':') goto err;
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}
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ip6_str.len = (int)(long)(t.val.s - ip6_str.s);
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ipv6 = str2ip6(&ip6_str);
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if (ipv6 == 0) goto err;
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*ip = *ipv6;
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return 0;
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err:
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ERR("%s:%d:%d: Invalid IPv6 address\n",
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st->file, token->start.line, token->start.col);
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return -1;
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}
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#endif /* USE_IPV6 */
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static int parse_ipv4(struct ip_addr* ip, cfg_token_t* token,
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cfg_parser_t* st)
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{
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int ret, i;
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cfg_token_t t;
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unsigned int v;
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ip->af = AF_INET;
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ip->len = 4;
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if (str2int(&token->val, &v) < 0) goto err;
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if (v < 0 || v > 255) goto err;
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ip->u.addr[0] = v;
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for(i = 1; i < 4; i++) {
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ret = cfg_get_token(&t, st, 0);
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if (ret < 0) return -1;
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if (ret > 0 || t.type != '.') goto err;
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ret = cfg_get_token(&t, st, 0);
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if (ret < 0) return -1;
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if (ret > 0 || t.type != CFG_TOKEN_ALPHA) goto err;
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if (str2int(&t.val, &v) < 0) goto err;
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if (v < 0 || v > 255) goto err;
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ip->u.addr[i] = v;
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}
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return 0;
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err:
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ERR("%s:%d:%d: Invalid IPv4 address\n",
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st->file, token->start.line, token->start.col);
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return -1;
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}
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static cfg_option_t methods[] = {
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{"SSLv2", .val = TLS_USE_SSLv2},
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{"SSLv3", .val = TLS_USE_SSLv3},
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{"SSLv23", .val = TLS_USE_SSLv23},
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{"TLSv1", .val = TLS_USE_TLSv1},
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{0}
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};
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static cfg_option_t domain_types[] = {
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{"server", .val = TLS_DOMAIN_SRV},
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{"srv", .val = TLS_DOMAIN_SRV},
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{"s", .val = TLS_DOMAIN_SRV},
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{"client", .val = TLS_DOMAIN_CLI},
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{"cli", .val = TLS_DOMAIN_CLI},
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{"c", .val = TLS_DOMAIN_CLI},
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{0}
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};
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static cfg_option_t token_default[] = {
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{"default"},
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{"def"},
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{"*"},
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{0}
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};
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static cfg_option_t options[] = {
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{"method", .param = methods, .f = cfg_parse_enum_opt},
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{"tls_method", .param = methods, .f = cfg_parse_enum_opt},
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{"verify_certificate", .f = cfg_parse_bool_opt},
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{"verify_cert", .f = cfg_parse_bool_opt},
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{"verify_depth", .f = cfg_parse_int_opt},
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{"require_certificate", .f = cfg_parse_bool_opt},
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{"require_cert", .f = cfg_parse_bool_opt},
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{"private_key", .f = cfg_parse_str_opt, .flags = CFG_STR_SHMMEM},
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{"pkey_file", .f = cfg_parse_str_opt, .flags = CFG_STR_SHMMEM},
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{"calist_file", .f = cfg_parse_str_opt, .flags = CFG_STR_SHMMEM},
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{"certificate", .f = cfg_parse_str_opt, .flags = CFG_STR_SHMMEM},
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{"cert_file", .f = cfg_parse_str_opt, .flags = CFG_STR_SHMMEM},
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{"cipher_list", .f = cfg_parse_str_opt, .flags = CFG_STR_SHMMEM},
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{"ca_list", .f = cfg_parse_str_opt, .flags = CFG_STR_SHMMEM},
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{"crl", .f = cfg_parse_str_opt, .flags = CFG_STR_SHMMEM},
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{0}
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};
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static void update_opt_variables(void)
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{
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int i;
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for(i = 0; methods[i].name; i++) {
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methods[i].param = &domain->method;
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}
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options[2].param = &domain->verify_cert;
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options[3].param = &domain->verify_cert;
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options[4].param = &domain->verify_depth;
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options[5].param = &domain->require_cert;
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options[6].param = &domain->require_cert;
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options[7].param = &domain->pkey_file;
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options[8].param = &domain->pkey_file;
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options[9].param = &domain->ca_file;
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options[10].param = &domain->cert_file;
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options[11].param = &domain->cert_file;
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options[12].param = &domain->cipher_list;
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options[13].param = &domain->ca_file;
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options[14].param = &domain->crl_file;
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}
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static int parse_hostport(int* type, struct ip_addr* ip, unsigned int* port,
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cfg_token_t* token, cfg_parser_t* st)
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{
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int ret;
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cfg_token_t t;
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cfg_option_t* opt;
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ret = cfg_get_token(&t, st, 0);
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if (ret < 0) return -1;
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if (ret > 0) {
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ERR("%s:%d:%d: Missing IP address\n", st->file,
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token->start.line, token->start.col);
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return -1;
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}
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if (t.type == '[') {
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#ifdef USE_IPV6
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if (parse_ipv6(ip, &t, st) < 0) return -1;
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#else
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ERR("%s:%d:%d: IPv6 address not supported (compiled without IPv6"
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" support)\n",
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st->file, t.start.line, t.start.col);
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return -1;
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#endif /* USE_IPV6 */
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} else if (t.type == CFG_TOKEN_ALPHA) {
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opt = cfg_lookup_token(token_default, &t.val);
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if (opt) {
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*type = TLS_DOMAIN_DEF;
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/* Default domain */
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return 0;
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} else {
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if (parse_ipv4(ip, &t, st) < 0) return -1;
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}
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} else {
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ERR("%s:%d:%d: Syntax error, IP address expected\n",
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st->file, t.start.line, t.start.col);
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return -1;
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}
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*type = 0;
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/* Parse port */
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ret = cfg_get_token(&t, st, 0);
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if (ret < 0) return -1;
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if (ret > 0) {
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ERR("%s:%d:%d: Syntax error, ':' expected\n", st->file, st->line,
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st->col);
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return -1;
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}
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if (t.type != ':') {
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ERR("%s:%d:%d: Syntax error, ':' expected\n",
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st->file, t.start.line, t.start.col);
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return -1;
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}
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ret = cfg_get_token(&t, st, 0);
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if (ret < 0) return -1;
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if (ret > 0) {
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ERR("%s:%d:%d: Premature end of file, port number missing\n",
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st->file, t.start.line, t.start.col);
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return -1;
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}
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if (t.type != CFG_TOKEN_ALPHA || (str2int(&t.val, port) < 0)) {
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ERR("%s:%d:%d: Invalid port number '%.*s'\n",
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st->file, t.start.line, t.start.col, STR_FMT(&t.val));
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return -1;
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}
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return 0;
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}
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static int parse_domain(void* param, cfg_parser_t* st, unsigned int flags)
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{
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cfg_token_t t;
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int ret;
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cfg_option_t* opt;
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int type;
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struct ip_addr ip;
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unsigned int port;
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memset(&ip, 0, sizeof(struct ip_addr));
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ret = cfg_get_token(&t, st, 0);
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if (ret < 0) return -1;
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if (ret > 0) {
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ERR("%s:%d:%d: TLS domain type missing\n",
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st->file, st->line, st->col);
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return -1;
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}
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if (t.type != CFG_TOKEN_ALPHA ||
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((opt = cfg_lookup_token(domain_types, &t.val)) == NULL)) {
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ERR("%s:%d:%d: Invalid TLS domain type %d:'%.*s'\n",
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st->file, t.start.line, t.start.col, t.type, STR_FMT(&t.val));
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return -1;
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}
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ret = cfg_get_token(&t, st, 0);
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if (ret < 0) return -1;
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if (ret > 0) {
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ERR("%s:%d:%d: TLS domain IP address missing\n",
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st->file, st->line, st->col);
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return -1;
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}
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if (t.type != ':') {
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ERR("%s:%d:%d: Syntax error, ':' expected\n",
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st->file, t.start.line, t.start.col);
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return -1;
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}
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port = 0;
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if (parse_hostport(&type, &ip, &port, &t, st) < 0) return -1;
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ret = cfg_get_token(&t, st, 0);
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if (ret < 0) return -1;
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if (ret > 0) {
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ERR("%s:%d:%d: Closing ']' missing\n",
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st->file, st->line, st->col);
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return -1;
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}
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if (t.type != ']') {
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ERR("%s:%d:%d: Syntax error, ']' expected\n",
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st->file, t.start.line, t.start.col);
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return -1;
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}
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if (cfg_eat_eol(st, flags)) return -1;
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if ((domain = tls_new_domain(opt->val | type, &ip, port)) == NULL) {
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ERR("%s:%d: Cannot create TLS domain structure\n", st->file, st->line);
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return -1;
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}
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ret = tls_add_domain(cfg, domain);
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if (ret < 0) {
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ERR("%s:%d: Error while creating TLS domain structure\n", st->file,
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st->line);
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tls_free_domain(domain);
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return -1;
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} else if (ret == 1) {
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ERR("%s:%d: Duplicate TLS domain (appears earlier in the config file)\n",
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st->file, st->line);
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tls_free_domain(domain);
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return -1;
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}
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update_opt_variables();
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cfg_set_options(st, options);
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return 0;
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}
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/*
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* Create configuration structures from configuration file
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*/
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tls_domains_cfg_t* tls_load_config(str* filename)
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{
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cfg_parser_t* parser;
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str empty;
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parser = NULL;
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if ((cfg = tls_new_cfg()) == NULL) goto error;
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empty.s = 0;
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empty.len = 0;
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if ((parser = cfg_parser_init(&empty, filename)) == NULL) {
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ERR("tls: Error while initializing configuration file parser.\n");
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goto error;
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}
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cfg_section_parser(parser, parse_domain, NULL);
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if (sr_cfg_parse(parser)) goto error;
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cfg_parser_close(parser);
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return cfg;
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error:
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if (parser) cfg_parser_close(parser);
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if (cfg) tls_free_cfg(cfg);
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return 0;
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}
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/*
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* Convert TLS method string to integer
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*/
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int tls_parse_method(str* method)
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{
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cfg_option_t* opt;
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if (!method) {
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BUG("Invalid parameter value\n");
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return -1;
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}
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opt = cfg_lookup_token(methods, method);
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if (!opt) return -1;
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return opt->val;
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}
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