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/*
* hashquery.c - CGI to handle SKS style /pks/hashquery requests
*
* Copyright 2011 Jonathan McDowell <noodles@earth.li>
*
* 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; version 2 of the License.
*
* 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.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <unistd.h>
#include "build-config.h"
#include "charfuncs.h"
#include "cleanup.h"
#include "keydb.h"
#include "log.h"
#include "marshal.h"
#include "mem.h"
#include "onak-conf.h"
void doerror(char *error)
{
printf("Content-Type: text/plain\n\n");
printf("%s", error);
cleanuplogthing();
cleanupconfig();
exit(EXIT_FAILURE);
}
int main(__unused int argc, __unused char *argv[])
{
char *request_method, *env;
int count, found, i;
uint8_t **hashes;
struct buffer_ctx cgipostbuf;
struct openpgp_publickey **keys;
struct onak_dbctx *dbctx;
readconfig(NULL);
initlogthing("hashquery", config.logfile);
request_method = getenv("REQUEST_METHOD");
if (request_method == NULL || strcmp(request_method, "POST") != 0) {
doerror("hashquery must be a HTTP POST request.\n");
}
env = getenv("CONTENT_LENGTH");
if ((env == NULL) || !(cgipostbuf.size = atoi(env))) {
doerror("Must provide a content length.\n");
}
cgipostbuf.offset = 0;
cgipostbuf.buffer = malloc(cgipostbuf.size);
if (cgipostbuf.buffer == NULL) {
doerror("Couldn't allocate memory for query content.\n");
}
if (!fread(cgipostbuf.buffer, cgipostbuf.size, 1, stdin)) {
doerror("Couldn't read query.\n");
}
hashes = (uint8_t **) unmarshal_array(buffer_fetchchar, &cgipostbuf,
(void * (*)(size_t (*)(void *, size_t, void *), void *))
unmarshal_skshash, &count);
free(cgipostbuf.buffer);
cgipostbuf.buffer = NULL;
cgipostbuf.size = cgipostbuf.offset = 0;
if (hashes == NULL) {
doerror("No hashes supplied.\n");
}
found = 0;
keys = calloc(sizeof(struct openpgp_publickey *), count);
if (keys == NULL) {
doerror("Couldn't allocate memory for reply.\n");
}
catchsignals();
dbctx = config.dbinit(config.backend, false);
if (dbctx == NULL) {
doerror("Failed to open key database.");
}
if (dbctx->fetch_key_skshash == NULL) {
dbctx->cleanupdb(dbctx);
doerror("Can't fetch by skshash with this backend.");
}
for (i = 0; i < count; i++) {
dbctx->fetch_key_skshash(dbctx,
(struct skshash *) hashes[i], &keys[found]);
if (keys[found] != NULL) {
found++;
}
free(hashes[i]);
hashes[i] = NULL;
}
free(hashes);
hashes = NULL;
dbctx->cleanupdb(dbctx);
puts("Content-Type: pgp/keys\n");
marshal_array(stdout_putchar, NULL,
(void (*)(size_t (*)(void *, size_t, void *),
void *, const void *))
marshal_publickey, (void **) keys, found);
printf("\n");
for (i = 0; i < found; i++) {
free_publickey(keys[i]);
}
free(keys);
cleanuplogthing();
cleanupconfig();
}
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