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/*
* winrc/anchor-update.c - windows trust anchor update util
*
* Copyright (c) 2009, NLnet Labs. All rights reserved.
*
* This software is open source.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of the NLNET LABS nor the names of its contributors may
* be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* \file
*
* This file is made because contrib/update-anchor.sh does not work on
* windows (no shell).
*/
#include "config.h"
#include "libunbound/unbound.h"
#include "ldns/rrdef.h"
#include "ldns/pkthdr.h"
#include "ldns/wire2str.h"
/** usage */
static void
usage(void)
{
printf("usage: { name-of-domain filename }+ \n");
printf("exit codes: 0 anchors updated, 1 no changes, 2 errors.\n");
exit(1);
}
/** fatal exit */
static void fatal(const char* str)
{
printf("fatal error: %s\n", str);
exit(2);
}
/** lookup data */
static struct ub_result*
do_lookup(struct ub_ctx* ctx, char* domain)
{
struct ub_result* result = NULL;
int r;
r = ub_resolve(ctx, domain, LDNS_RR_TYPE_DNSKEY, LDNS_RR_CLASS_IN,
&result);
if(r) {
printf("failed to lookup %s\n", ub_strerror(r));
fatal("ub_resolve failed");
}
if(!result->havedata && (result->rcode == LDNS_RCODE_SERVFAIL ||
result->rcode == LDNS_RCODE_REFUSED))
return NULL; /* probably no internet connection */
if(!result->havedata) fatal("result has no data");
if(!result->secure) fatal("result is not secure");
return result;
}
/** print result to file */
static void
do_print(struct ub_result* result, char* file)
{
FILE* out = fopen(file, "w");
char s[65535], t[32];
int i;
if(!out) {
perror(file);
fatal("fopen failed");
}
i = 0;
if(result->havedata)
while(result->data[i]) {
sldns_wire2str_rdata_buf((uint8_t*)result->data[i],
(size_t)result->len[i], s, sizeof(s),
(uint16_t)result->qtype);
sldns_wire2str_type_buf((uint16_t)result->qtype, t, sizeof(t));
fprintf(out, "%s\t%s\t%s\n", result->qname, t, s);
i++;
}
fclose(out);
}
/** update domain to file */
static int
do_update(char* domain, char* file)
{
struct ub_ctx* ctx;
struct ub_result* result;
int r;
printf("updating %s to %s\n", domain, file);
ctx = ub_ctx_create();
if(!ctx) fatal("ub_ctx_create failed");
if((r=ub_ctx_add_ta_file(ctx, file))) {
printf("%s\n", ub_strerror(r));
fatal("ub_ctx_add_ta_file failed");
}
if(!(result=do_lookup(ctx, domain))) {
ub_ctx_delete(ctx);
return 1;
}
ub_ctx_delete(ctx);
do_print(result, file);
ub_resolve_free(result);
return 0;
}
/** anchor update main */
int main(int argc, char** argv)
{
int retcode = 1;
if(argc == 1) {
usage();
}
argc--;
argv++;
while(argc > 0) {
int r = do_update(argv[0], argv[1]);
if(r == 0) retcode = 0;
/* next */
argc-=2;
argv+=2;
}
return retcode;
}
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