tests/dst/gsstest.c

/*
 * Copyright (C) 2006, 2007, 2009-2011, 2013-2016  Internet Systems Consortium, Inc. ("ISC")
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */

/* $Id: gsstest.c,v 1.19 2011/11/30 00:48:51 marka Exp $ */

#include <config.h>

#include <stdlib.h>
#include <string.h>
#include <time.h>

#include <isc/app.h>
#include <isc/base64.h>
#include <isc/entropy.h>
#include <isc/log.h>
#include <isc/mem.h>
#include <isc/print.h>
#include <isc/sockaddr.h>
#include <isc/socket.h>
#include <isc/task.h>
#include <isc/timer.h>
#include <isc/util.h>

#include <dns/dispatch.h>
#include <dns/fixedname.h>
#include <dns/keyvalues.h>
#include <dns/log.h>
#include <dns/message.h>
#include <dns/name.h>
#include <dns/request.h>
#include <dns/result.h>
#include <dns/tkey.h>
#include <dns/tsig.h>
#include <dns/view.h>

#include <dns/dnssec.h>
#include <dns/events.h>
#include <dns/masterdump.h>
#include <dns/rdataset.h>
#include <dns/resolver.h>
#include <dns/types.h>

#include <dst/result.h>

#ifdef GSSAPI
#include ISC_PLATFORM_GSSAPIHEADER

struct dst_context {
    unsigned int magic;
    dst_key_t *key;
    isc_mem_t *mctx;
    void *opaque;
};

#define CHECK(str, x) { \
    if ((x) != ISC_R_SUCCESS) { \
        fprintf(stderr, "I:%d:%s: %s\n", __LINE__, (str), isc_result_totext(x)); \
        goto end; \
    } \
}

static dns_fixedname_t servername, gssname;

static isc_mem_t *mctx;
static dns_requestmgr_t *requestmgr;
static isc_sockaddr_t address;

static dns_tsig_keyring_t *ring;
static dns_tsigkey_t *tsigkey = NULL;
static gss_ctx_id_t gssctx;
static gss_ctx_id_t *gssctxp = &gssctx;

#define RUNCHECK(x) RUNTIME_CHECK((x) == ISC_R_SUCCESS)

#define PORT 53
#define TIMEOUT 30

static void initctx1(isc_task_t *task, isc_event_t *event);
static void sendquery(isc_task_t *task, isc_event_t *event);
static void setup();

static void
console(isc_task_t *task, isc_event_t *event)
{
    char buf[32];
    int c;

    isc_event_t *ev = NULL;

    isc_event_free(&event);

    for (;;) {
        printf("\nCommand => ");
        c = scanf("%31s", buf);

        if (c == EOF || strcmp(buf, "quit") == 0) {
            isc_app_shutdown();
            return;
        }

        if (strcmp(buf, "initctx") == 0) {
            ev = isc_event_allocate(mctx, (void *)1, 1, initctx1,
                        NULL, sizeof(*event));
            isc_task_send(task, &ev);
            return;
        }

        if (strcmp(buf, "query") == 0) {
            ev = isc_event_allocate(mctx, (void *)1, 1, sendquery,
                        NULL, sizeof(*event));
            isc_task_send(task, &ev);
            return;
        }

        printf("Unknown command\n");
    }
}

static void
recvresponse(isc_task_t *task, isc_event_t *event) {
    dns_requestevent_t *reqev = (dns_requestevent_t *)event;
    isc_result_t result, result2;
    dns_message_t *query = NULL, *response = NULL;
    isc_buffer_t outtoken;
    isc_buffer_t outbuf;
    char output[10 * 1024];

    unsigned char array[DNS_NAME_MAXTEXT + 1];
    isc_buffer_init(&outtoken, array, sizeof(array));

    UNUSED(task);

    REQUIRE(reqev != NULL);

    query = reqev->ev_arg;

    if (reqev->result != ISC_R_SUCCESS) {
        fprintf(stderr, "I:request event result: %s\n",
            isc_result_totext(reqev->result));
        goto end;
    }

    response = NULL;
    result = dns_message_create(mctx, DNS_MESSAGE_INTENTPARSE, &response);
    CHECK("dns_message_create", result);

    printf("\nReceived Response:\n");

    result2 = dns_request_getresponse(reqev->request, response,
                     DNS_MESSAGEPARSE_PRESERVEORDER);
    isc_buffer_init(&outbuf, output, sizeof(output));
    result = dns_message_totext(response, &dns_master_style_debug, 0,
                    &outbuf);
    CHECK("dns_message_totext", result);
    printf("%.*s\n", (int)isc_buffer_usedlength(&outbuf),
           (char *)isc_buffer_base(&outbuf));

    CHECK("dns_request_getresponse", result2);

    if (response != NULL)
        dns_message_destroy(&response);

 end:
    if (query != NULL)
        dns_message_destroy(&query);

    if (reqev->request != NULL)
        dns_request_destroy(&reqev->request);

    isc_event_free(&event);

    event = isc_event_allocate(mctx, (void *)1, 1, console, NULL,
                   sizeof(*event));
    isc_task_send(task, &event);
    return;
}


static void
sendquery(isc_task_t *task, isc_event_t *event)
{
    dns_request_t *request = NULL;
    dns_message_t *message = NULL;
    dns_name_t *qname = NULL;
    dns_rdataset_t *qrdataset = NULL;
    isc_result_t result;
    dns_fixedname_t queryname;
    isc_buffer_t buf;
    isc_buffer_t outbuf;
    char output[10 * 1024];
    static char host[256];
    int c;

    isc_event_free(&event);

    printf("Query => ");
    c = scanf("%255s", host);
    if (c == EOF)
        return;

    dns_fixedname_init(&queryname);
    isc_buffer_init(&buf, host, strlen(host));
    isc_buffer_add(&buf, strlen(host));
    result = dns_name_fromtext(dns_fixedname_name(&queryname), &buf,
                   dns_rootname, 0, NULL);
    CHECK("dns_name_fromtext", result);

    result = dns_message_create(mctx, DNS_MESSAGE_INTENTRENDER, &message);
    if (result != ISC_R_SUCCESS)
        goto end;

    message->opcode = dns_opcode_query;
    message->rdclass = dns_rdataclass_in;
    message->id = (unsigned short)(random() & 0xFFFF);

    result = dns_message_gettempname(message, &qname);
    if (result != ISC_R_SUCCESS)
        goto end;

    result = dns_message_gettemprdataset(message, &qrdataset);
    if (result != ISC_R_SUCCESS)
        goto end;

    dns_name_init(qname, NULL);
    dns_name_clone(dns_fixedname_name(&queryname), qname);
    dns_rdataset_makequestion(qrdataset, dns_rdataclass_in,
                  dns_rdatatype_a);
    ISC_LIST_APPEND(qname->list, qrdataset, link);
    dns_message_addname(message, qname, DNS_SECTION_QUESTION);

    result = dns_request_create(requestmgr, message, &address, 0, tsigkey,
                    TIMEOUT, task, recvresponse,
        message, &request);
    CHECK("dns_request_create", result);

    printf("Submitting query:\n");
    isc_buffer_init(&outbuf, output, sizeof(output));
    result = dns_message_totext(message, &dns_master_style_debug, 0,
                    &outbuf);
    CHECK("dns_message_totext", result);
    printf("%.*s\n", (int)isc_buffer_usedlength(&outbuf),
           (char *)isc_buffer_base(&outbuf));

    return;

 end:
    if (qname != NULL)
        dns_message_puttempname(message, &qname);
    if (qrdataset != NULL)
        dns_message_puttemprdataset(message, &qrdataset);
    if (message != NULL)
        dns_message_destroy(&message);
}

static void
initctx2(isc_task_t *task, isc_event_t *event) {
    dns_requestevent_t *reqev = (dns_requestevent_t *)event;
    isc_result_t result;
    dns_message_t *query = NULL, *response = NULL;
    isc_buffer_t outtoken;
    unsigned char array[DNS_NAME_MAXTEXT + 1];
    dns_rdataset_t *rdataset;
    dns_rdatatype_t qtype;
    dns_name_t *question_name;

    UNUSED(task);

    REQUIRE(reqev != NULL);

    query = reqev->ev_arg;

    if (reqev->result != ISC_R_SUCCESS) {
        fprintf(stderr, "I:request event result: %s\n",
            isc_result_totext(reqev->result));
        goto end;
    }

    response = NULL;
    result = dns_message_create(mctx, DNS_MESSAGE_INTENTPARSE, &response);
    CHECK("dns_message_create", result);

    result = dns_request_getresponse(reqev->request, response,
                     DNS_MESSAGEPARSE_PRESERVEORDER);
    CHECK("dns_request_getresponse", result);

    if (response->rcode != dns_rcode_noerror) {
        result = ISC_RESULTCLASS_DNSRCODE + response->rcode;
        fprintf(stderr, "I:response rcode: %s\n",
            isc_result_totext(result));
        goto end;
    }

    printf("Received token from server, calling gss_init_sec_context()\n");
    isc_buffer_init(&outtoken, array, DNS_NAME_MAXTEXT + 1);
    result = dns_tkey_processgssresponse(query, response,
                         dns_fixedname_name(&gssname),
                         &gssctx, &outtoken,
                         &tsigkey, ring, NULL);
    gssctx = *gssctxp;
    CHECK("dns_tkey_processgssresponse", result);
    printf("Context accepted\n");

    question_name = NULL;
    dns_message_currentname(response, DNS_SECTION_ANSWER, &question_name);
    rdataset = ISC_LIST_HEAD(question_name->list);
    INSIST(rdataset != NULL);
    qtype = rdataset->type;
    if (qtype == dns_rdatatype_tkey) {
        printf("Received TKEY response from server\n");
        printf("Context completed\n");
    } else {
        printf("Did not receive TKEY response from server\n");
        printf("Context not completed\n");
        dns_tsigkey_detach(&tsigkey);
        tsigkey = NULL;
    }

    dns_message_destroy(&response);

 end:
    if (query != NULL)
        dns_message_destroy(&query);

    if (reqev->request != NULL)
        dns_request_destroy(&reqev->request);

    isc_event_free(&event);

    event = isc_event_allocate(mctx, (void *)1, 1, console, NULL,
                   sizeof(*event));
    isc_task_send(task, &event);
    return;
}

static void
initctx1(isc_task_t *task, isc_event_t *event) {
    char gssid[512];
    char contextname[512];
    isc_result_t result;
    isc_buffer_t buf;
    dns_message_t *query;
    dns_request_t *request;
    int c;

    isc_event_free(&event);

    printf("Initctx - GSS name => ");
    c = scanf("%511s", gssid);
    if (c == EOF)
        return;

    snprintf(contextname, sizeof(contextname),
         "gsstest.context.%d.", (int)time(NULL));

    printf("Initctx - context name we're using: %s\n", contextname);

    printf("Negotiating GSSAPI context: ");
    printf("%s", gssid);
    printf("\n");

    /*
     * Setup a GSSAPI context with the server
     */
    dns_fixedname_init(&servername);
    isc_buffer_init(&buf, contextname, strlen(contextname));
    isc_buffer_add(&buf, strlen(contextname));
    result = dns_name_fromtext(dns_fixedname_name(&servername), &buf,
                   dns_rootname, 0, NULL);
    CHECK("dns_name_fromtext", result);

    /* Make name happen */
    dns_fixedname_init(&gssname);
    isc_buffer_init(&buf, gssid, strlen(gssid));
    isc_buffer_add(&buf, strlen(gssid));
    result = dns_name_fromtext(dns_fixedname_name(&gssname), &buf,
                   dns_rootname, 0, NULL);
    CHECK("dns_name_fromtext", result);

    query = NULL;
    result = dns_message_create(mctx, DNS_MESSAGE_INTENTRENDER, &query);
    CHECK("dns_message_create", result);

    printf("Calling gss_init_sec_context()\n");
    gssctx = GSS_C_NO_CONTEXT;
    result = dns_tkey_buildgssquery(query, dns_fixedname_name(&servername),
                    dns_fixedname_name(&gssname),
                    NULL, 36000, &gssctx, ISC_TRUE,
                    mctx, NULL);
    CHECK("dns_tkey_buildgssquery", result);

    printf("Sending context token to server\n");
    request = NULL;
    result = dns_request_create(requestmgr, query, &address, 0, NULL,
                    TIMEOUT, task, initctx2, query, &request);
    CHECK("dns_request_create", result);

    return;
 end:
    event = isc_event_allocate(mctx, (void *)1, 1, console, NULL,
                   sizeof(*event));
    isc_task_send(task, &event);return;
}

static void
setup(void)
{
    for (;;) {
        char serveraddress[512];
        struct in_addr inaddr;
        int c;

        printf("Server IP => ");
        c = scanf("%511s", serveraddress);

        if (c == EOF || strcmp(serveraddress, "quit") == 0) {
            isc_app_shutdown();
            return;
        }

        if (inet_pton(AF_INET, serveraddress, &inaddr) == 1) {
            isc_sockaddr_fromin(&address, &inaddr, PORT);
            return;
        }

    }
}

int
main(int argc, char *argv[]) {
    isc_taskmgr_t *taskmgr;
    isc_timermgr_t *timermgr;
    isc_socketmgr_t *socketmgr;
    isc_socket_t *sock;
    unsigned int attrs, attrmask;
    isc_sockaddr_t bind_any;
    dns_dispatchmgr_t *dispatchmgr;
    dns_dispatch_t *dispatchv4;
    dns_view_t *view;
    isc_entropy_t *ectx;
    isc_task_t *task;
    isc_log_t *lctx = NULL;
    isc_logconfig_t *lcfg = NULL;
    isc_logdestination_t destination;

    UNUSED(argv);
    UNUSED(argc);

    RUNCHECK(isc_app_start());

    dns_result_register();

    mctx = NULL;
    RUNCHECK(isc_mem_create(0, 0, &mctx));

    RUNCHECK(isc_log_create(mctx, &lctx, &lcfg));
    isc_log_setcontext(lctx);
    dns_log_init(lctx);
    dns_log_setcontext(lctx);

    /*
     * Create and install the default channel.
     */
    destination.file.stream = stderr;
    destination.file.name = NULL;
    destination.file.versions = ISC_LOG_ROLLNEVER;
    destination.file.maximum_size = 0;
    RUNCHECK(isc_log_createchannel(lcfg, "_default",
                       ISC_LOG_TOFILEDESC,
                       ISC_LOG_DYNAMIC,
                       &destination, ISC_LOG_PRINTTIME));
    RUNCHECK(isc_log_usechannel(lcfg, "_default", NULL, NULL));

    isc_log_setdebuglevel(lctx, 9);

    ectx = NULL;
    RUNCHECK(isc_entropy_create(mctx, &ectx));
    RUNCHECK(isc_entropy_createfilesource(ectx, "/dev/urandom"));

    RUNCHECK(dst_lib_init(mctx, ectx, ISC_ENTROPY_GOODONLY));

    taskmgr = NULL;
    RUNCHECK(isc_taskmgr_create(mctx, 1, 0, &taskmgr));
    task = NULL;
    RUNCHECK(isc_task_create(taskmgr, 0, &task));
    timermgr = NULL;
    RUNCHECK(isc_timermgr_create(mctx, &timermgr));
    socketmgr = NULL;
    RUNCHECK(isc_socketmgr_create(mctx, &socketmgr));
    dispatchmgr = NULL;
    RUNCHECK(dns_dispatchmgr_create(mctx, ectx, &dispatchmgr));
    isc_sockaddr_any(&bind_any);
    attrs = DNS_DISPATCHATTR_UDP |
        DNS_DISPATCHATTR_MAKEQUERY |
        DNS_DISPATCHATTR_IPV4;
    attrmask = DNS_DISPATCHATTR_UDP |
           DNS_DISPATCHATTR_TCP |
           DNS_DISPATCHATTR_IPV4 |
           DNS_DISPATCHATTR_IPV6;
    dispatchv4 = NULL;
    RUNCHECK(dns_dispatch_getudp(dispatchmgr, socketmgr, taskmgr,
                      &bind_any, 4096, 4, 2, 3, 5,
                      attrs, attrmask, &dispatchv4));
    requestmgr = NULL;
    RUNCHECK(dns_requestmgr_create(mctx, timermgr, socketmgr, taskmgr,
                        dispatchmgr, dispatchv4, NULL,
                        &requestmgr));

    ring = NULL;
    RUNCHECK(dns_tsigkeyring_create(mctx, &ring));

    view = NULL;
    RUNCHECK(dns_view_create(mctx, 0, "_test", &view));
    dns_view_setkeyring(view, ring);

    sock = NULL;
    RUNCHECK(isc_socket_create(socketmgr, PF_INET, isc_sockettype_udp,
                   &sock));

    setup();

    RUNCHECK(isc_app_onrun(mctx, task, console, NULL));

    (void)isc_app_run();

    if (tsigkey)
        dns_tsigkey_detach(&tsigkey);

    dns_requestmgr_shutdown(requestmgr);
    dns_requestmgr_detach(&requestmgr);

    dns_dispatch_detach(&dispatchv4);
    dns_dispatchmgr_destroy(&dispatchmgr);

    isc_timermgr_destroy(&timermgr);

    isc_task_detach(&task);
    isc_taskmgr_destroy(&taskmgr);

    isc_socket_detach(&sock);
    isc_socketmgr_destroy(&socketmgr);

    isc_mem_stats(mctx, stdout);

    dns_view_detach(&view);

    dst_lib_destroy();
    isc_entropy_detach(&ectx);

    isc_mem_stats(mctx, stdout);
    isc_mem_destroy(&mctx);

    isc_app_finish();

    return (0);
}
#else
int
main(int argc, char *argv[]) {
    UNUSED(argc);
    UNUSED(argv);
    fprintf(stderr, "R:GSSAPIONLY\n");
    return (0);
}
#endif