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https://github.com/cryb-to/cryb-otp.git
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be6f32b5bd
It is not yet capable of handling OTP requests, but all the elements are there: it can receive and decode Access-Request messages and respond with either Access-Accept or Access-Reject. All that remains is to refactor the guts of otpkey into libotp and plug them into otpradiusd.
115 lines
3.4 KiB
C
115 lines
3.4 KiB
C
/*-
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* Copyright (c) 2016-2018 Dag-Erling Smørgrav
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* Copyright (c) 2018 The University of Oslo
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "cryb/impl.h"
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#include <sys/socket.h>
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#include <errno.h>
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#include <netdb.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include <cryb/ctype.h>
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#include "otpradiusd.h"
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/*
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* Parse an address spec of the form:
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*
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* addr-spec := <host-spec> [ ':' <port-spec> ]
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* host-spec := '*' | <host-name> | <ipv4-addr> | '[' <ipv6-addr> ']'
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* port-spec := <service-name> | <port-number>
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*
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* then call getaddrinfo(3) with the appropriate parameters. Input
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* validation is fairly lax; we trust getaddrinfo(3) to take up the slack.
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*
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* Derived from fetch_resolve() in FreeBSD's libfetch.
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*/
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int
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resolve(const char *addr, const char *port, struct addrinfo **res)
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{
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char hbuf[256];
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struct addrinfo hints;
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const char *hb, *he, *sep;
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const char *host, *service;
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int len;
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*res = NULL;
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/* first, check for a bracketed IPv6 address */
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if (*addr == '[') {
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hb = addr + 1;
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for (he = hb; *he != ']'; ++he) {
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if (!is_xdigit(*he) && *he != ':') {
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errno = EINVAL;
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return (EAI_SYSTEM);
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}
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sep = he;
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}
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} else {
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hb = addr;
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sep = strchrnul(hb, ':');
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he = sep;
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}
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/* see if we need to copy the host name */
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if (he == hb || (*hb == '*' && he - hb == 1)) {
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host = NULL;
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} else if (*he != '\0') {
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len = snprintf(hbuf, sizeof hbuf, "%.*s", (int)(he - hb), hb);
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if (len < 0)
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return (EAI_SYSTEM);
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if ((size_t)len >= sizeof hbuf) {
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errno = ENAMETOOLONG;
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return (EAI_SYSTEM);
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}
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host = hbuf;
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} else {
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host = hb;
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}
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/* was it followed by a service name? */
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if (*sep == '\0' && port != NULL) {
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service = port;
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} else if (*sep != '\0') {
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service = sep + 1;
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} else {
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service = NULL;
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}
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/* resolve */
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memset(&hints, 0, sizeof hints);
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hints.ai_family = AF_UNSPEC;
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hints.ai_socktype = SOCK_DGRAM;
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hints.ai_flags = AI_ADDRCONFIG | AI_PASSIVE;
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return (getaddrinfo(host, service, &hints, res));
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}
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