/* -*-c-*-
*
- * $Id: key.h,v 1.5 2000/02/12 18:55:40 mdw Exp $
+ * $Id: key.h,v 1.9 2001/06/22 19:37:59 mdw Exp $
*
* Simple key management
*
/*----- Revision history --------------------------------------------------*
*
* $Log: key.h,v $
+ * Revision 1.9 2001/06/22 19:37:59 mdw
+ * New interface to enquire whether a key has expired.
+ *
+ * Revision 1.8 2001/02/03 11:57:38 mdw
+ * Allow creating keyfiles with no file attached.
+ *
+ * Revision 1.7 2000/12/06 20:33:27 mdw
+ * Make flags be macros rather than enumerations, to ensure that they're
+ * unsigned.
+ *
+ * Revision 1.6 2000/06/17 11:27:43 mdw
+ * Add key fetching interface.
+ *
* Revision 1.5 2000/02/12 18:55:40 mdw
* Make it all compile properly.
*
/* --- Key file flags --- */
-enum {
- KF_WRITE = 1, /* File opened for writing */
- KF_MODIFIED = 2 /* File has been modified */
-};
+#define KF_WRITE 1u /* File opened for writing */
+#define KF_MODIFIED 2u /* File has been modified */
/* --- Iterating over keys --- *
*
typedef struct { hash_iter i; time_t t; } key_iter;
typedef struct { sym_iter i; } key_attriter;
+/* --- Key fetching --- */
+
+typedef struct key_fetchdef {
+ char *name; /* Name of item */
+ size_t off; /* Offset into target structure */
+ unsigned e; /* Flags for the item */
+ const struct key_fetchdef *kf; /* Substructure pointer */
+} key_fetchdef;
+
/* --- File opening options --- */
-enum {
- KOPEN_READ,
- KOPEN_WRITE
-};
+#define KOPEN_READ 0u
+#define KOPEN_WRITE 1u
+#define KOPEN_MASK 0xff
+#define KOPEN_NOFILE 0x100
/* --- Various other magic numbers --- */
*
* Arguments: @key_file *f@ = pointer to file structure to initialize
* @const char *file@ = pointer to the file name
- * @int how@ = opening options (@KOPEN_*@).
+ * @unsigned how@ = opening options (@KOPEN_*@).
* @key_reporter *rep@ = error reporting function
* @void *arg@ = argument for function
*
* owner only.
*/
-extern int key_open(key_file */*f*/, const char */*file*/, int /*how*/,
+extern int key_open(key_file */*f*/, const char */*file*/, unsigned /*how*/,
key_reporter */*rep*/, void */*arg*/);
/* --- @key_close@ --- *
*
* Arguments: @key_file *f@ = pointer to file structure to initialize
* @const char *file@ = pointer to the file name
- * @int how@ = opening options (@KOPEN_*@).
+ * @unsigned how@ = opening options (@KOPEN_*@).
*
* Returns: Zero if it worked, nonzero otherwise.
*
* for the private use of @key_open@.
*/
-extern int key_lockfile(key_file */*f*/, const char */*file*/, int /*how*/);
+extern int key_lockfile(key_file */*f*/, const char */*file*/,
+ unsigned /*how*/);
/*----- Creating and manipulating keys ------------------------------------*/
extern int key_delete(key_file */*f*/, key */*k*/);
+/* --- @key_expired@ --- *
+ *
+ * Arguments: @key *k@ = pointer to key block
+ *
+ * Returns: Zero if the key is OK, nonzero if it's expired.
+ */
+
+int key_expired(key */*k*/);
+
/* --- @key_expire@ --- *
*
* Arguments: @key_file *f@ = pointer to file block
extern key *key_next(key_iter */*i*/);
+/*----- Fetching key data conveniently ------------------------------------*/
+
+/* --- @key_fetchinit@ --- *
+ *
+ * Arguments: @const key_fetchdef *kf@ = pointer to base definition
+ * @key_packstruct *kps@ = pointer to destination packing def
+ * @void *p@ = pointer to destination block
+ *
+ * Returns: Pointer to packing definition.
+ *
+ * Use: Initializes a packing definition (@key_packdef@ structure).
+ * If @kps@ is null on entry, an appropriately sized block is
+ * allocated automatically. Otherwise it must be large enough.
+ */
+
+extern key_packdef *key_fetchinit(const key_fetchdef */*kf*/,
+ key_packstruct */*kp*/, void */*p*/);
+
+/* --- @key_fetch@ --- *
+ *
+ * Arguments: @key_packdef *kp@ = pointer to packing structure
+ * @key *k@ = key file containing desired key
+ *
+ * Returns: Error code, or zero.
+ *
+ * Use: Fetches an unpacked key from a packed one.
+ */
+
+extern int key_fetch(key_packdef */*kp*/, key */*k*/);
+
+/* --- @key_fetchbyname@ --- *
+ *
+ * Arguments: @key_packdef *kp@ = pointer to packing structure
+ * @key_file *kf@ = key file containing desired key
+ * @const char *tag@ = user's tag describing the key
+ *
+ * Returns: Error code, or zero.
+ *
+ * Use: Fetches a named key from a key file and unpacks it
+ * conveniently.
+ */
+
+extern int key_fetchbyname(key_packdef */*kp*/,
+ key_file */*kf*/, const char */*tag*/);
+
+/* --- @key_fetchdone@ --- *
+ *
+ * Arguments: @key_packdef *kp@ = pointer to packing structure
+ *
+ * Returns: ---
+ *
+ * Use: Frees a packing structure. If the structure was allocated by
+ * @key_fetchinit@ then it is freed.
+ */
+
+extern void key_fetchdone(key_packdef */*kp*/);
+
/*----- Other functions ---------------------------------------------------*/
/* --- @key_moan@ --- *