Add a test for key fetching by SKS hash

[onak.git] / keyid.c

diff --git a/keyid.c b/keyid.c
index 5149fd640d7e552294aa17c19e17d72cc4db05cf..29c61f00137134f0685d5bdc382a25a3ac12b2a8 100644 (file)
--- a/keyid.c
+++ b/keyid.c
@@ -4,17 +4,19 @@
  * Jonathan McDowell <noodles@earth.li>
  *
  * Copyright 2002 Project Purple
- *
- * $Id: keyid.c,v 1.10 2004/05/31 22:04:51 noodles Exp $
  */
 
+#include <string.h>
 #include <sys/types.h>
+#include <arpa/inet.h>
 
-#include "assert.h"
 #include "keyid.h"
 #include "keystructs.h"
 #include "log.h"
+#include "parsekey.h"
 #include "md5.h"
+#include "mem.h"
+#include "merge.h"
 #include "sha1.h"
 
 
@@ -46,8 +48,8 @@ unsigned char *get_fingerprint(struct openpgp_packet *packet,
        unsigned char c;
        size_t         modlen, explen;
 
-       assert(fingerprint != NULL);
-       assert(len != NULL);
+       log_assert(fingerprint != NULL);
+       log_assert(len != NULL);
 
        *len = 0;
 
@@ -112,7 +114,7 @@ uint64_t get_packetid(struct openpgp_packet *packet)
        size_t          length = 0;
        unsigned char   buff[20];
 
-       assert(packet != NULL);
+       log_assert(packet != NULL);
 
        switch (packet->data[0]) {
        case 2:
@@ -159,3 +161,88 @@ uint64_t get_packetid(struct openpgp_packet *packet)
 
        return keyid;
 }
+
+static struct openpgp_packet_list *sortpackets(struct openpgp_packet_list
+                                                       *packets)
+{
+       struct openpgp_packet_list *sorted, **cur, *next;
+
+       sorted = NULL;
+       while (packets != NULL) {
+               cur = &sorted;
+               while (*cur != NULL && compare_packets((*cur)->packet,
+                               packets->packet) < 0) {
+                       cur = &((*cur)->next);
+               }
+               next = *cur;
+               *cur = packets;
+               packets = packets->next;
+               (*cur)->next = next;
+       }
+
+       return sorted;
+}
+
+void get_skshash(struct openpgp_publickey *key, struct skshash *hash)
+{
+       struct openpgp_packet_list *packets = NULL, *list_end = NULL;
+       struct openpgp_packet_list *curpacket;
+       struct md5_ctx md5_context;
+       struct openpgp_publickey *next;
+       uint32_t tmp;
+
+       /*
+        * We only want a single key, so clear any link to the next
+        * one for the period during the flatten.
+        */
+       next = key->next;
+       key->next = NULL;
+       flatten_publickey(key, &packets, &list_end);
+       key->next = next;
+       packets = sortpackets(packets);
+
+       md5_init_ctx(&md5_context);
+
+       for (curpacket = packets; curpacket != NULL;
+                       curpacket = curpacket->next) {
+               tmp = htonl(curpacket->packet->tag);
+               md5_process_bytes(&tmp, sizeof(tmp), &md5_context);
+               tmp = htonl(curpacket->packet->length);
+               md5_process_bytes(&tmp, sizeof(tmp), &md5_context);
+               md5_process_bytes(curpacket->packet->data,
+                               curpacket->packet->length,
+                               &md5_context);
+       }
+
+       md5_finish_ctx(&md5_context, &hash->hash);
+       free_packet_list(packets);
+}
+
+uint8_t hexdigit(char c)
+{
+       if (c >= '0' && c <= '9')
+               return c - '0';
+       else if (c >= 'a' && c <= 'f')
+               return c - 'a' + 10;
+       else if (c >= 'A' && c <= 'F')
+               return c - 'A' + 10;
+       else
+               return 0;
+}
+
+int parse_skshash(char *search, struct skshash *hash)
+{
+       int i, len;
+
+       len = strlen(search);
+       if (len > 32) {
+               return 0;
+       }
+
+       for (i = 0; i < len; i += 2) {
+               hash->hash[i >> 1] = (hexdigit(search[i]) << 4) +
+                               hexdigit(search[i + 1]);
+       }
+
+       return 1;
+}