Add /pks/hashquery

[onak.git] / hashquery.c

diff --git a/hashquery.c b/hashquery.c
new file mode 100644 (file)
index 0000000..a0f8e1e
--- /dev/null
+++ b/hashquery.c
@@ -0,0 +1,113 @@
+/*
+ * hashquery.c - CGI to handle SKS style /pks/hashquery requests
+ *
+ * Copyright 2011 Jonathan McDowell <noodles@earth.li>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+#include <unistd.h>
+
+#include "charfuncs.h"
+#include "cleanup.h"
+#include "keyid.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(int argc, char *argv[])
+{
+       char *request_method;
+       int count, found, i;
+       uint8_t **hashes;
+       struct buffer_ctx cgipostbuf;
+       struct openpgp_publickey **keys;
+
+       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");
+       }
+
+       if (!(cgipostbuf.size = atoi(getenv("CONTENT_LENGTH")))) {
+               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 * (*)(int (*)(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");
+       }
+
+       if (config.dbbackend->fetch_key_skshash == NULL) {
+               doerror("Can't fetch by skshash with this backend.");
+       }
+
+       catchsignals();
+       config.dbbackend->initdb(false);
+
+       for (i = 0; i < count; i++) {
+               config.dbbackend->fetch_key_skshash(
+                               (struct skshash *) hashes[i], &keys[found]);
+               if (keys[found] != NULL) {
+                       found++;
+               }
+               free(hashes[i]);
+               hashes[i] = NULL;
+       }
+       free(hashes);
+       hashes = NULL;
+
+       config.dbbackend->cleanupdb();
+
+       puts("Content-Type: pgp/keys\n");
+       marshal_array(stdout_putchar, NULL,
+                       (void (*)(int (*)(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();
+}