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'GNUPG-1-9-BRANCH'.

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+/* keydb.h - Key database
+ * Copyright (C) 1998, 1999, 2000, 2001 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+#ifndef G10_KEYDB_H
+#define G10_KEYDB_H
+
+#include "types.h"
+#include "global.h"
+#include "packet.h"
+#include "cipher.h"
+
+/* What qualifies as a certification (rather than a signature?) */
+#define IS_CERT(s)       (IS_KEY_SIG(s) || IS_UID_SIG(s) || IS_SUBKEY_SIG(s) \
+                         || IS_KEY_REV(s) || IS_UID_REV(s) || IS_SUBKEY_REV(s))
+#define IS_SIG(s)        (!IS_CERT(s))
+#define IS_KEY_SIG(s)    ((s)->sig_class == 0x1f)
+#define IS_UID_SIG(s)    (((s)->sig_class & ~3) == 0x10)
+#define IS_SUBKEY_SIG(s) ((s)->sig_class == 0x18)
+#define IS_KEY_REV(s)    ((s)->sig_class == 0x20)
+#define IS_UID_REV(s)    ((s)->sig_class == 0x30)
+#define IS_SUBKEY_REV(s) ((s)->sig_class == 0x28)
+
+struct getkey_ctx_s;
+typedef struct getkey_ctx_s *GETKEY_CTX;
+
+/****************
+ * A Keyblock is all packets which form an entire certificate;
+ * i.e. the public key, certificate, trust packets, user ids,
+ * signatures, and subkey.
+ *
+ * This structure is also used to bind arbitrary packets together.
+ */
+
+struct kbnode_struct {
+    KBNODE next;
+    PACKET *pkt;
+    int flag;
+    int private_flag;
+    ulong recno;  /* used while updating the trustdb */
+};
+
+#define is_deleted_kbnode(a)  ((a)->private_flag & 1)
+#define is_cloned_kbnode(a)   ((a)->private_flag & 2)
+
+
+enum resource_type {
+    rt_UNKNOWN = 0,
+    rt_RING = 1
+};
+
+
+/****************
+ * A data structre to hold information about the external position
+ * of a keyblock.
+ */
+struct keyblock_pos_struct {
+    int   resno;     /* resource number */
+    enum resource_type rt;
+    off_t offset;    /* position information */
+    unsigned count;  /* length of the keyblock in packets */
+    IOBUF  fp;	     /* used by enum_keyblocks */
+    int secret;      /* working on a secret keyring */
+    PACKET *pkt;     /* ditto */
+    int valid;
+};
+typedef struct keyblock_pos_struct KBPOS;
+
+/* structure to hold a couple of public key certificates */
+typedef struct pk_list *PK_LIST;
+struct pk_list {
+    PK_LIST next;
+    PKT_public_key *pk;
+    int flags; /* flag bit 1==throw_keyid */
+};
+
+/* structure to hold a couple of secret key certificates */
+typedef struct sk_list *SK_LIST;
+struct sk_list {
+    SK_LIST next;
+    PKT_secret_key *sk;
+    int mark; /* not used */
+};
+
+/* structure to collect all information which can be used to
+ * identify a public key */
+typedef struct pubkey_find_info *PUBKEY_FIND_INFO;
+struct pubkey_find_info {
+    u32  keyid[2];
+    unsigned nbits;
+    byte pubkey_algo;
+    byte fingerprint[MAX_FINGERPRINT_LEN];
+    char userid[1];
+};
+
+
+typedef struct keydb_handle *KEYDB_HANDLE;
+
+typedef enum {
+    KEYDB_SEARCH_MODE_NONE,
+    KEYDB_SEARCH_MODE_EXACT,
+    KEYDB_SEARCH_MODE_SUBSTR,
+    KEYDB_SEARCH_MODE_MAIL,
+    KEYDB_SEARCH_MODE_MAILSUB,
+    KEYDB_SEARCH_MODE_MAILEND,
+    KEYDB_SEARCH_MODE_WORDS,
+    KEYDB_SEARCH_MODE_SHORT_KID,
+    KEYDB_SEARCH_MODE_LONG_KID,
+    KEYDB_SEARCH_MODE_FPR16,
+    KEYDB_SEARCH_MODE_FPR20,
+    KEYDB_SEARCH_MODE_FPR,
+    KEYDB_SEARCH_MODE_FIRST,
+    KEYDB_SEARCH_MODE_NEXT
+} KeydbSearchMode;
+
+struct keydb_search_desc {
+    KeydbSearchMode mode;
+    int (*skipfnc)(void *,u32*);
+    void *skipfncvalue;
+    union {
+        const char *name;
+        char fpr[MAX_FINGERPRINT_LEN];
+        u32  kid[2];
+    } u;
+    int exact;
+};
+
+/*-- keydb.c --*/
+
+/*
+  Flag 1 == force
+  Flag 2 == default
+*/
+int keydb_add_resource (const char *url, int flags, int secret);
+KEYDB_HANDLE keydb_new (int secret);
+void keydb_release (KEYDB_HANDLE hd);
+const char *keydb_get_resource_name (KEYDB_HANDLE hd);
+int keydb_get_keyblock (KEYDB_HANDLE hd, KBNODE *ret_kb);
+int keydb_update_keyblock (KEYDB_HANDLE hd, KBNODE kb);
+int keydb_insert_keyblock (KEYDB_HANDLE hd, KBNODE kb);
+int keydb_delete_keyblock (KEYDB_HANDLE hd);
+int keydb_locate_writable (KEYDB_HANDLE hd, const char *reserved);
+void keydb_rebuild_caches (void);
+int keydb_search_reset (KEYDB_HANDLE hd);
+#define keydb_search(a,b,c) keydb_search2((a),(b),(c),NULL)
+int keydb_search2 (KEYDB_HANDLE hd, KEYDB_SEARCH_DESC *desc,
+		   size_t ndesc, size_t *descindex);
+int keydb_search_first (KEYDB_HANDLE hd);
+int keydb_search_next (KEYDB_HANDLE hd);
+int keydb_search_kid (KEYDB_HANDLE hd, u32 *kid);
+int keydb_search_fpr (KEYDB_HANDLE hd, const byte *fpr);
+
+
+/*-- pkclist.c --*/
+void show_revocation_reason( PKT_public_key *pk, int mode );
+int  check_signatures_trust( PKT_signature *sig );
+void release_pk_list( PK_LIST pk_list );
+int  build_pk_list( STRLIST rcpts, PK_LIST *ret_pk_list, unsigned use );
+int  algo_available( preftype_t preftype, int algo, void *hint );
+int  select_algo_from_prefs( PK_LIST pk_list, int preftype,
+			     int request, void *hint );
+int  select_mdc_from_pklist (PK_LIST pk_list);
+
+/*-- skclist.c --*/
+void release_sk_list( SK_LIST sk_list );
+int  build_sk_list( STRLIST locusr, SK_LIST *ret_sk_list,
+					    int unlock, unsigned use );
+
+/*-- passphrase.h --*/
+int  have_static_passphrase(void);
+void read_passphrase_from_fd( int fd );
+void passphrase_clear_cache ( u32 *keyid, int algo );
+DEK *passphrase_to_dek( u32 *keyid, int pubkey_algo,
+			int cipher_algo, STRING2KEY *s2k, int mode,
+                        const char *tryagain_text, int *canceled);
+void set_next_passphrase( const char *s );
+char *get_last_passphrase(void);
+
+/*-- getkey.c --*/
+int classify_user_id( const char *name, KEYDB_SEARCH_DESC *desc);
+void cache_public_key( PKT_public_key *pk );
+void getkey_disable_caches(void);
+int get_pubkey( PKT_public_key *pk, u32 *keyid );
+int get_pubkey_fast ( PKT_public_key *pk, u32 *keyid );
+KBNODE get_pubkeyblock( u32 *keyid );
+int get_pubkey_byname( PKT_public_key *pk,  const char *name,
+                       KBNODE *ret_keyblock, KEYDB_HANDLE *ret_kdbhd,
+		       int include_disabled );
+int get_pubkey_bynames( GETKEY_CTX *rx, PKT_public_key *pk,
+			STRLIST names, KBNODE *ret_keyblock );
+int get_pubkey_next( GETKEY_CTX ctx, PKT_public_key *pk, KBNODE *ret_keyblock );
+void get_pubkey_end( GETKEY_CTX ctx );
+int get_seckey( PKT_secret_key *sk, u32 *keyid );
+int get_primary_seckey( PKT_secret_key *sk, u32 *keyid );
+int get_pubkey_byfprint( PKT_public_key *pk, const byte *fprint,
+						 size_t fprint_len );
+int get_pubkey_byfprint_fast (PKT_public_key *pk,
+                              const byte *fprint, size_t fprint_len);
+int get_keyblock_byfprint( KBNODE *ret_keyblock, const byte *fprint,
+						 size_t fprint_len );
+int get_keyblock_bylid( KBNODE *ret_keyblock, ulong lid );
+int seckey_available( u32 *keyid );
+int get_seckey_byname( PKT_secret_key *sk, const char *name, int unlock );
+int get_seckey_bynames( GETKEY_CTX *rx, PKT_secret_key *sk,
+			STRLIST names, KBNODE *ret_keyblock );
+int get_seckey_byfprint( PKT_secret_key *sk,
+			 const byte *fprint, size_t fprint_len);
+int get_seckey_next( GETKEY_CTX ctx, PKT_secret_key *sk, KBNODE *ret_keyblock );
+void get_seckey_end( GETKEY_CTX ctx );
+int enum_secret_keys( void **context, PKT_secret_key *sk,
+		      int with_subkeys, int with_spm );
+void merge_keys_and_selfsig( KBNODE keyblock );
+char*get_user_id_string( u32 *keyid );
+char*get_user_id_string_printable( u32 *keyid );
+char*get_long_user_id_string( u32 *keyid );
+char*get_user_id( u32 *keyid, size_t *rn );
+char*get_user_id_printable( u32 *keyid );
+KEYDB_HANDLE get_ctx_handle(GETKEY_CTX ctx);
+
+/*-- keyid.c --*/
+int pubkey_letter( int algo );
+u32 keyid_from_sk( PKT_secret_key *sk, u32 *keyid );
+u32 keyid_from_pk( PKT_public_key *pk, u32 *keyid );
+u32 keyid_from_sig( PKT_signature *sig, u32 *keyid );
+u32 keyid_from_fingerprint( const byte *fprint, size_t fprint_len, u32 *keyid );
+byte *namehash_from_uid(PKT_user_id *uid);
+unsigned nbits_from_pk( PKT_public_key *pk );
+unsigned nbits_from_sk( PKT_secret_key *sk );
+const char *datestr_from_pk( PKT_public_key *pk );
+const char *datestr_from_sk( PKT_secret_key *sk );
+const char *datestr_from_sig( PKT_signature *sig );
+const char *expirestr_from_pk( PKT_public_key *pk );
+const char *expirestr_from_sk( PKT_secret_key *sk );
+const char *expirestr_from_sig( PKT_signature *sig );
+
+const char *colon_strtime (u32 t);
+const char *colon_datestr_from_pk (PKT_public_key *pk);
+const char *colon_datestr_from_sk (PKT_secret_key *sk);
+const char *colon_datestr_from_sig (PKT_signature *sig);
+const char *colon_expirestr_from_sig (PKT_signature *sig);
+
+byte *fingerprint_from_sk( PKT_secret_key *sk, byte *buf, size_t *ret_len );
+byte *fingerprint_from_pk( PKT_public_key *pk, byte *buf, size_t *ret_len );
+
+/*-- kbnode.c --*/
+KBNODE new_kbnode( PACKET *pkt );
+KBNODE clone_kbnode( KBNODE node );
+void release_kbnode( KBNODE n );
+void delete_kbnode( KBNODE node );
+void add_kbnode( KBNODE root, KBNODE node );
+void insert_kbnode( KBNODE root, KBNODE node, int pkttype );
+void move_kbnode( KBNODE *root, KBNODE node, KBNODE where );
+void remove_kbnode( KBNODE *root, KBNODE node );
+KBNODE find_prev_kbnode( KBNODE root, KBNODE node, int pkttype );
+KBNODE find_next_kbnode( KBNODE node, int pkttype );
+KBNODE find_kbnode( KBNODE node, int pkttype );
+KBNODE walk_kbnode( KBNODE root, KBNODE *context, int all );
+void clear_kbnode_flags( KBNODE n );
+int  commit_kbnode( KBNODE *root );
+void dump_kbnode( KBNODE node );
+
+#endif /*G10_KEYDB_H*/