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-rw-r--r--g10/kbnode.c399
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diff --git a/g10/kbnode.c b/g10/kbnode.c
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+/* kbnode.c - keyblock node utility functions
+ * Copyright (C) 1998, 1999, 2000, 2001, 2002,
+ * 2005 Free Software Foundation, Inc.
+ *
+ * This file is part of GnuPG.
+ *
+ * GnuPG 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * GnuPG 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 <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include "util.h"
+#include "memory.h"
+#include "packet.h"
+#include "keydb.h"
+
+#define USE_UNUSED_NODES 1
+
+static KBNODE unused_nodes;
+
+static KBNODE
+alloc_node(void)
+{
+ KBNODE n;
+
+ n = unused_nodes;
+ if( n )
+ unused_nodes = n->next;
+ else
+ n = xmalloc( sizeof *n );
+ n->next = NULL;
+ n->pkt = NULL;
+ n->flag = 0;
+ n->private_flag=0;
+ n->recno = 0;
+ return n;
+}
+
+static void
+free_node( KBNODE n )
+{
+ if( n ) {
+#if USE_UNUSED_NODES
+ n->next = unused_nodes;
+ unused_nodes = n;
+#else
+ xfree( n );
+#endif
+ }
+}
+
+
+
+KBNODE
+new_kbnode( PACKET *pkt )
+{
+ KBNODE n = alloc_node();
+ n->pkt = pkt;
+ return n;
+}
+
+
+KBNODE
+clone_kbnode( KBNODE node )
+{
+ KBNODE n = alloc_node();
+
+ n->pkt = node->pkt;
+ n->private_flag = node->private_flag | 2; /* mark cloned */
+ return n;
+}
+
+
+void
+release_kbnode( KBNODE n )
+{
+ KBNODE n2;
+
+ while( n ) {
+ n2 = n->next;
+ if( !is_cloned_kbnode(n) ) {
+ free_packet( n->pkt );
+ xfree( n->pkt );
+ }
+ free_node( n );
+ n = n2;
+ }
+}
+
+
+/****************
+ * Delete NODE.
+ * Note: This only works with walk_kbnode!!
+ */
+void
+delete_kbnode( KBNODE node )
+{
+ node->private_flag |= 1;
+}
+
+/****************
+ * Append NODE to ROOT. ROOT must exist!
+ */
+void
+add_kbnode( KBNODE root, KBNODE node )
+{
+ KBNODE n1;
+
+ for(n1=root; n1->next; n1 = n1->next)
+ ;
+ n1->next = node;
+}
+
+/****************
+ * Insert NODE into the list after root but before a packet which is not of
+ * type PKTTYPE
+ * (only if PKTTYPE != 0)
+ */
+void
+insert_kbnode( KBNODE root, KBNODE node, int pkttype )
+{
+ if( !pkttype ) {
+ node->next = root->next;
+ root->next = node;
+ }
+ else {
+ KBNODE n1;
+
+ for(n1=root; n1->next; n1 = n1->next)
+ if( pkttype != n1->next->pkt->pkttype ) {
+ node->next = n1->next;
+ n1->next = node;
+ return;
+ }
+ /* no such packet, append */
+ node->next = NULL;
+ n1->next = node;
+ }
+}
+
+
+/****************
+ * Find the previous node (if PKTTYPE = 0) or the previous node
+ * with pkttype PKTTYPE in the list starting with ROOT of NODE.
+ */
+KBNODE
+find_prev_kbnode( KBNODE root, KBNODE node, int pkttype )
+{
+ KBNODE n1;
+
+ for (n1=NULL; root && root != node; root = root->next ) {
+ if (!pkttype ||root->pkt->pkttype == pkttype)
+ n1 = root;
+ }
+ return n1;
+}
+
+/****************
+ * Ditto, but find the next packet. The behaviour is trivial if
+ * PKTTYPE is 0 but if it is specified, the next node with a packet
+ * of this type is returned. The function has some knowledge about
+ * the valid ordering of packets: e.g. if the next signature packet
+ * is requested, the function will not return one if it encounters
+ * a user-id.
+ */
+KBNODE
+find_next_kbnode( KBNODE node, int pkttype )
+{
+ for( node=node->next ; node; node = node->next ) {
+ if( !pkttype )
+ return node;
+ else if( pkttype == PKT_USER_ID
+ && ( node->pkt->pkttype == PKT_PUBLIC_KEY
+ || node->pkt->pkttype == PKT_SECRET_KEY ) )
+ return NULL;
+ else if( pkttype == PKT_SIGNATURE
+ && ( node->pkt->pkttype == PKT_USER_ID
+ || node->pkt->pkttype == PKT_PUBLIC_KEY
+ || node->pkt->pkttype == PKT_SECRET_KEY ) )
+ return NULL;
+ else if( node->pkt->pkttype == pkttype )
+ return node;
+ }
+ return NULL;
+}
+
+
+KBNODE
+find_kbnode( KBNODE node, int pkttype )
+{
+ for( ; node; node = node->next ) {
+ if( node->pkt->pkttype == pkttype )
+ return node;
+ }
+ return NULL;
+}
+
+
+
+/****************
+ * Walk through a list of kbnodes. This function returns
+ * the next kbnode for each call; before using the function the first
+ * time, the caller must set CONTEXT to NULL (This has simply the effect
+ * to start with ROOT).
+ */
+KBNODE
+walk_kbnode( KBNODE root, KBNODE *context, int all )
+{
+ KBNODE n;
+
+ do {
+ if( !*context ) {
+ *context = root;
+ n = root;
+ }
+ else {
+ n = (*context)->next;
+ *context = n;
+ }
+ } while( !all && n && is_deleted_kbnode(n) );
+
+ return n;
+}
+
+void
+clear_kbnode_flags( KBNODE n )
+{
+ for( ; n; n = n->next ) {
+ n->flag = 0;
+ }
+}
+
+
+/****************
+ * Commit changes made to the kblist at ROOT. Note that ROOT my change,
+ * and it is therefore passed by reference.
+ * The function has the effect of removing all nodes marked as deleted.
+ * returns true if any node has been changed
+ */
+int
+commit_kbnode( KBNODE *root )
+{
+ KBNODE n, nl;
+ int changed = 0;
+
+ for( n = *root, nl=NULL; n; n = nl->next ) {
+ if( is_deleted_kbnode(n) ) {
+ if( n == *root )
+ *root = nl = n->next;
+ else
+ nl->next = n->next;
+ if( !is_cloned_kbnode(n) ) {
+ free_packet( n->pkt );
+ xfree( n->pkt );
+ }
+ free_node( n );
+ changed = 1;
+ }
+ else
+ nl = n;
+ }
+ return changed;
+}
+
+void
+remove_kbnode( KBNODE *root, KBNODE node )
+{
+ KBNODE n, nl;
+
+ for( n = *root, nl=NULL; n; n = nl->next ) {
+ if( n == node ) {
+ if( n == *root )
+ *root = nl = n->next;
+ else
+ nl->next = n->next;
+ if( !is_cloned_kbnode(n) ) {
+ free_packet( n->pkt );
+ xfree( n->pkt );
+ }
+ free_node( n );
+ }
+ else
+ nl = n;
+ }
+}
+
+
+/****************
+ * Move NODE behind right after WHERE or to the beginning if WHERE is NULL.
+ */
+void
+move_kbnode( KBNODE *root, KBNODE node, KBNODE where )
+{
+ KBNODE tmp, prev;
+
+ if( !root || !*root || !node )
+ return; /* sanity check */
+ for( prev = *root; prev && prev->next != node; prev = prev->next )
+ ;
+ if( !prev )
+ return; /* node is not in the list */
+
+ if( !where ) { /* move node before root */
+ if( node == *root ) /* move to itself */
+ return;
+ prev->next = node->next;
+ node->next = *root;
+ *root = node;
+ return;
+ }
+ /* move it after where */
+ if( node == where )
+ return;
+ tmp = node->next;
+ node->next = where->next;
+ where->next = node;
+ prev->next = tmp;
+}
+
+
+
+
+void
+dump_kbnode( KBNODE node )
+{
+ for(; node; node = node->next ) {
+ const char *s;
+ switch( node->pkt->pkttype ) {
+ case 0: s="empty"; break;
+ case PKT_PUBLIC_KEY: s="public-key"; break;
+ case PKT_SECRET_KEY: s="secret-key"; break;
+ case PKT_SECRET_SUBKEY: s= "secret-subkey"; break;
+ case PKT_PUBKEY_ENC: s="public-enc"; break;
+ case PKT_SIGNATURE: s="signature"; break;
+ case PKT_ONEPASS_SIG: s="onepass-sig"; break;
+ case PKT_USER_ID: s="user-id"; break;
+ case PKT_PUBLIC_SUBKEY: s="public-subkey"; break;
+ case PKT_COMMENT: s="comment"; break;
+ case PKT_RING_TRUST: s="trust"; break;
+ case PKT_PLAINTEXT: s="plaintext"; break;
+ case PKT_COMPRESSED: s="compressed"; break;
+ case PKT_ENCRYPTED: s="encrypted"; break;
+ case PKT_GPG_CONTROL: s="gpg-control"; break;
+ default: s="unknown"; break;
+ }
+ fprintf(stderr, "node %p %02x/%02x type=%s",
+ node, node->flag, node->private_flag, s);
+ if( node->pkt->pkttype == PKT_USER_ID ) {
+ PKT_user_id *uid = node->pkt->pkt.user_id;
+ fputs(" \"", stderr);
+ print_string( stderr, uid->name, uid->len, 0 );
+ fprintf (stderr, "\" %c%c%c%c\n",
+ uid->is_expired? 'e':'.',
+ uid->is_revoked? 'r':'.',
+ uid->created? 'v':'.',
+ uid->is_primary? 'p':'.' );
+ }
+ else if( node->pkt->pkttype == PKT_SIGNATURE ) {
+ fprintf(stderr, " class=%02x keyid=%08lX ts=%lu\n",
+ node->pkt->pkt.signature->sig_class,
+ (ulong)node->pkt->pkt.signature->keyid[1],
+ (ulong)node->pkt->pkt.signature->timestamp);
+ }
+ else if( node->pkt->pkttype == PKT_GPG_CONTROL ) {
+ fprintf(stderr, " ctrl=%d len=%u\n",
+ node->pkt->pkt.gpg_control->control,
+ (unsigned int)node->pkt->pkt.gpg_control->datalen);
+ }
+ else if( node->pkt->pkttype == PKT_PUBLIC_KEY
+ || node->pkt->pkttype == PKT_PUBLIC_SUBKEY ) {
+ PKT_public_key *pk = node->pkt->pkt.public_key;
+ fprintf(stderr, " keyid=%08lX a=%d u=%d %c%c%c%c\n",
+ (ulong)keyid_from_pk( pk, NULL ),
+ pk->pubkey_algo, pk->pubkey_usage,
+ pk->has_expired? 'e':'.',
+ pk->is_revoked? 'r':'.',
+ pk->is_valid? 'v':'.',
+ pk->mdc_feature? 'm':'.');
+ }
+ else
+ fputs("\n", stderr);
+ }
+}
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