Switch debian build system to dh

[onak.git] / merge.c

diff --git a/merge.c b/merge.c
index c1410e175cdb4afa7b404c38d990a7294619d9ad..353a844e6de9a1d346e7f102d7872b4378206137 100644 (file)
--- a/merge.c
+++ b/merge.c
@@ -1,32 +1,86 @@
 /*
  * merge.c - Routines to merge OpenPGP public keys.
  *
 /*
  * merge.c - Routines to merge OpenPGP public keys.
  *

- * Jonathan McDowell <noodles@earth.li>
+ * Copyright 2002-2005,2007,2011 Jonathan McDowell <noodles@earth.li>

  *
  *

- * Copyright 2002 Project Purple
+ * 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, write to the Free Software Foundation, Inc., 51
+ * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

  */
 
  */
 

-#include <assert.h>

 #include <stdio.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <stdlib.h>

+#include <string.h>

 
 

+#include "decodekey.h"
+#include "keydb.h"

 #include "keyid.h"
 #include "keystructs.h"
 #include "ll.h"
 #include "keyid.h"
 #include "keystructs.h"
 #include "ll.h"

+#include "log.h"

 #include "mem.h"
 #include "merge.h"
 
 /**
  *     compare_packets - Check to see if 2 OpenPGP packets are the same.
 #include "mem.h"
 #include "merge.h"
 
 /**
  *     compare_packets - Check to see if 2 OpenPGP packets are the same.

- *     @a: The first key to compare.
- *     @b: The second key to compare.
+ *     @a: The first packet to compare.
+ *     @b: The second packet to compare.

  *
  *

- *     Takes 2 keys and returns true if they are the same and false otherwise.
+ *     Takes 2 packets and returns 0 if they are the same, -1 if a is
+ *      less than b, or 1 if a is greater than b.

  */
  */

-bool compare_packets(struct openpgp_packet *a, struct openpgp_packet *b)
+int compare_packets(struct openpgp_packet *a, struct openpgp_packet *b)

 {
 {

-       return (a->tag == b->tag && a->length == b->length &&
-               !memcmp(a->data, b->data, b->length));
+       int ret, len;
+
+       if (a->tag > b->tag) {
+               ret = 1;
+       } else if (b->tag > a->tag) {
+               ret = -1;
+       } else {
+               len = (a->length < b->length) ? a->length : b->length;
+               ret = memcmp(a->data, b->data, len);
+               if (ret == 0 && a->length != b->length) {
+                       ret = (a->length < b->length) ? -1 : 1;
+               }
+       }
+
+       return ret;
+}
+
+/**
+ *     compare_signatures - Check to see if 2 OpenPGP signatures are the same.
+ *     @a: The first signature to compare.
+ *     @b: The second signature to compare.
+ *
+ *     Takes 2 signature packets and returns true if they are the same and
+ *     false otherwise.
+ */
+bool compare_signatures(struct openpgp_packet *a, struct openpgp_packet *b)
+{
+       uint64_t a_keyid, b_keyid;
+       time_t a_creation, b_creation;
+
+       if (a->data[0] != b->data[0]) {
+               /* Different signature versions, so not the same */
+               return false;
+       } else if (a->data[0] == 4 && a->data[1] != b->data[1]) {
+               /* Type 4 signature, but different types */
+               return false;
+       } else {
+               sig_info(a, &a_keyid, &a_creation);
+               sig_info(b, &b_keyid, &b_creation);
+               return (a_creation == b_creation) && (a_keyid == b_keyid);
+       }

 }
 
 /**
 }
 
 /**


@@ -43,7 +97,7 @@ bool find_packet(struct openpgp_packet_list *packet_list,
        bool found = false;
 
        while (!found && packet_list != NULL) {
        bool found = false;
 
        while (!found && packet_list != NULL) {

-               if (compare_packets(packet_list->packet, packet)) {
+               if (compare_packets(packet_list->packet, packet) == 0) {

                        found = true;
                }
                packet_list = packet_list -> next;
                        found = true;
                }
                packet_list = packet_list -> next;


@@ -52,6 +106,31 @@ bool find_packet(struct openpgp_packet_list *packet_list,
        return found;
 }
 
        return found;
 }
 

+/**
+ *     find_signature - Checks to see if an OpenPGP signature exists in a list.
+ *     @packet_list: The list of packets to look in.
+ *     @packet: The signature to look for.
+ *
+ *     Walks through the packet_list checking to see if the signature given is
+ *     present in it. Returns a pointer to it if it is, NULL otherwise.
+ *
+ */
+struct openpgp_packet_list *find_signature(
+                       struct openpgp_packet_list *packet_list,
+                       struct openpgp_packet *packet)
+{
+       struct openpgp_packet_list *found = NULL;
+
+       while (!found && packet_list != NULL) {
+               if (compare_signatures(packet_list->packet, packet)) {
+                       found = packet_list;
+               }
+               packet_list = packet_list -> next;
+       }
+
+       return found;
+}
+

 /**
  *     get_signed_packet - Gets a signed packet from a list.
  *     @packet_list: The list of packets to look in.
 /**
  *     get_signed_packet - Gets a signed packet from a list.
  *     @packet_list: The list of packets to look in.


@@ -67,7 +146,7 @@ struct openpgp_signedpacket_list *find_signed_packet(
        struct openpgp_signedpacket_list *found = NULL;
 
        while (found == NULL && packet_list != NULL) {
        struct openpgp_signedpacket_list *found = NULL;
 
        while (found == NULL && packet_list != NULL) {

-               if (compare_packets(packet_list->packet, packet)) {
+               if (compare_packets(packet_list->packet, packet) == 0) {

                        found = packet_list;
                }
                packet_list = packet_list -> next;
                        found = packet_list;
                }
                packet_list = packet_list -> next;


@@ -94,7 +173,7 @@ bool remove_signed_packet(struct openpgp_signedpacket_list **packet_list,
        bool found = false;
 
        for (cur = *packet_list; !found && (cur != NULL); cur = cur->next) {
        bool found = false;
 
        for (cur = *packet_list; !found && (cur != NULL); cur = cur->next) {

-               if (compare_packets(cur->packet, packet)) {
+               if (compare_packets(cur->packet, packet) == 0) {

                        found = true;
                        if (prev == NULL) {
                                *packet_list = cur->next;
                        found = true;
                        if (prev == NULL) {
                                *packet_list = cur->next;


@@ -104,7 +183,11 @@ bool remove_signed_packet(struct openpgp_signedpacket_list **packet_list,
                        if (cur->next == NULL) {
                                *list_end = prev;
                        }
                        if (cur->next == NULL) {
                                *list_end = prev;
                        }

+                       /*
+                        * TODO: Free the removed signed packet...
+                        */

                }
                }

+               prev = cur;

        }
 
        return found;
        }
 
        return found;


@@ -127,12 +210,18 @@ int merge_packet_sigs(struct openpgp_signedpacket_list *old,
        struct openpgp_packet_list      *curpacket = NULL;
        struct openpgp_packet_list      *nextpacket = NULL;
 
        struct openpgp_packet_list      *curpacket = NULL;
        struct openpgp_packet_list      *nextpacket = NULL;
 

-       assert(compare_packets(old->packet, new->packet));
+       log_assert(compare_packets(old->packet, new->packet) == 0);

 
        curpacket = new->sigs;
        while (curpacket != NULL) {
                nextpacket = curpacket->next;
 
        curpacket = new->sigs;
        while (curpacket != NULL) {
                nextpacket = curpacket->next;

-               if (find_packet(old->sigs, curpacket->packet)) {
+               /*
+                * TODO: We should be checking the signature and then
+                * potentially merging/replacing it depending on the subpackets
+                * really. For now this stops us adding the same one twice
+                * however.
+                */ 
+               if (find_signature(old->sigs, curpacket->packet)) {

                        /*
                         * We already have this sig, remove it from the
                         * difference list and free the memory allocated for
                        /*
                         * We already have this sig, remove it from the
                         * difference list and free the memory allocated for


@@ -141,7 +230,7 @@ int merge_packet_sigs(struct openpgp_signedpacket_list *old,
                        if (lastpacket != NULL) {
                                lastpacket->next = curpacket->next;
                        } else {
                        if (lastpacket != NULL) {
                                lastpacket->next = curpacket->next;
                        } else {

-                               assert(curpacket == new->sigs);
+                               log_assert(curpacket == new->sigs);

                                new->sigs = curpacket->next;
                        }
                        curpacket->next = NULL;
                                new->sigs = curpacket->next;
                        }
                        curpacket->next = NULL;


@@ -191,25 +280,29 @@ int merge_signed_packets(struct openpgp_signedpacket_list **old,
                        if (newelem->sigs == NULL) {
                                remove_signed_packet(new,
                                                new_end,
                        if (newelem->sigs == NULL) {
                                remove_signed_packet(new,
                                                new_end,

-                                               curelem->packet);
+                                               newelem->packet);

                        }
                }
        }
 
        /*
                        }
                }
        }
 
        /*

-        * If *new != NULL now then there are UIDs on the new key that weren't
-        * on the old key. Add them.
+        * If *new != NULL now then there might be UIDs on the new key that
+        * weren't on the old key. Walk through them, checking if the UID is
+        * on the old key and if not adding them to it.

         */
        for (curelem = *new; curelem != NULL;
                        curelem = curelem->next) {
         */
        for (curelem = *new; curelem != NULL;
                        curelem = curelem->next) {

-               ADD_PACKET_TO_LIST((*old_end),
+
+               if (find_signed_packet(*old, curelem->packet) == NULL) {
+                       ADD_PACKET_TO_LIST((*old_end),

                                packet_dup(curelem->packet));
                                packet_dup(curelem->packet));

-               if (*old == NULL) {
-                       *old = *old_end;
-               }
-               packet_list_add(&(*old_end)->sigs,
+                       if (*old == NULL) {
+                               *old = *old_end;
+                       }
+                       packet_list_add(&(*old_end)->sigs,

                                &(*old_end)->last_sig,
                                curelem->sigs);
                                &(*old_end)->last_sig,
                                curelem->sigs);

+               }

        }
 
        return 0;
        }
 
        return 0;


@@ -234,13 +327,20 @@ int merge_keys(struct openpgp_publickey *a, struct openpgp_publickey *b)
        struct openpgp_packet_list      *curpacket = NULL; 
        struct openpgp_packet_list      *lastpacket = NULL;
        struct openpgp_packet_list      *nextpacket = NULL;
        struct openpgp_packet_list      *curpacket = NULL; 
        struct openpgp_packet_list      *lastpacket = NULL;
        struct openpgp_packet_list      *nextpacket = NULL;

+       uint64_t keya, keyb;

 
        if (a == NULL || b == NULL) {
                /*
                 * Do nothing.
                 */
 
        if (a == NULL || b == NULL) {
                /*
                 * Do nothing.
                 */

-               rc = 1;
-       } else if (get_keyid(a) != get_keyid(b)) {
+               return 1;
+       }
+
+       if (get_keyid(a, &keya) != ONAK_E_OK) {
+               return 1;
+       } else if (get_keyid(b, &keyb) != ONAK_E_OK) {
+               return 1;
+       } else if (keya != keyb) {

                /*
                 * Key IDs are different.
                 */
                /*
                 * Key IDs are different.
                 */


@@ -249,12 +349,12 @@ int merge_keys(struct openpgp_publickey *a, struct openpgp_publickey *b)
                /*
                 * Key IDs are the same, so I guess we have to merge them.
                 */
                /*
                 * Key IDs are the same, so I guess we have to merge them.
                 */

-               curpacket = b->revocations;
+               curpacket = b->sigs;

                while (curpacket != NULL) {
                        nextpacket = curpacket->next;
                while (curpacket != NULL) {
                        nextpacket = curpacket->next;

-                       if (find_packet(a->revocations, curpacket->packet)) {
+                       if (find_packet(a->sigs, curpacket->packet)) {

                                /*
                                /*

-                                * We already have this revocation, remove it
+                                * We already have this signature, remove it

                                 * from the difference list and free the memory
                                 * allocated for it.
                                 */
                                 * from the difference list and free the memory
                                 * allocated for it.
                                 */


@@ -262,8 +362,8 @@ int merge_keys(struct openpgp_publickey *a, struct openpgp_publickey *b)
                                if (lastpacket != NULL) {
                                        lastpacket->next = curpacket->next;
                                } else {
                                if (lastpacket != NULL) {
                                        lastpacket->next = curpacket->next;
                                } else {

-                                       assert(curpacket == b->revocations);
-                                       b->revocations = curpacket->next;
+                                       log_assert(curpacket == b->sigs);
+                                       b->sigs = curpacket->next;

                                }
                                curpacket->next = NULL;
                                free_packet_list(curpacket);
                                }
                                curpacket->next = NULL;
                                free_packet_list(curpacket);


@@ -273,15 +373,15 @@ int merge_keys(struct openpgp_publickey *a, struct openpgp_publickey *b)
                        }
                        curpacket = nextpacket;
                }
                        }
                        curpacket = nextpacket;
                }

-               b->last_revocation = lastpacket;
+               b->last_sig = lastpacket;

 
                /*
 
                /*

-                * Anything left on b->revocations doesn't exist on
-                * a->revocations, so add them to the list.
+                * Anything left on b->sigs doesn't exist on
+                * a->sigs, so add them to the list.

                 */
                 */

-               packet_list_add(&a->revocations,
-                               &a->last_revocation,
-                               b->revocations);
+               packet_list_add(&a->sigs,
+                               &a->last_sig,
+                               b->sigs);

 
                /*
                 * Merge uids (signed list).
 
                /*
                 * Merge uids (signed list).


@@ -289,10 +389,18 @@ int merge_keys(struct openpgp_publickey *a, struct openpgp_publickey *b)
                 */
                merge_signed_packets(&a->uids, &a->last_uid, 
                                &b->uids, &b->last_uid);
                 */
                merge_signed_packets(&a->uids, &a->last_uid, 
                                &b->uids, &b->last_uid);

-               merge_signed_packets(&a->subkeys, &a->last_uid,
+               merge_signed_packets(&a->subkeys, &a->last_subkey,

                                &b->subkeys, &b->last_subkey);
 
        }
 
                                &b->subkeys, &b->last_subkey);
 
        }
 

+       /*
+        * If either key was revoked, make sure both the new ones are marked as
+        * being so.
+        */
+       if (a->revoked || b->revoked) {
+               a->revoked = b->revoked = true;
+       }
+

        return rc;
 }
        return rc;
 }