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/*
* storage.h: interface defining functions for storage and recovery
* of PuTTY's persistent data.
*/
#ifndef PUTTY_STORAGE_H
#define PUTTY_STORAGE_H
#include "defs.h"
/* ----------------------------------------------------------------------
* Functions to save and restore PuTTY sessions. Note that this is
* only the low-level code to do the reading and writing. The
* higher-level code that translates an internal Conf structure into
* a set of (key,value) pairs in their external storage format is
* elsewhere, since it doesn't (mostly) change between platforms.
*/
/*
* Write a saved session. The caller is expected to call
* open_setting_w() to get a `void *' handle, then pass that to a
* number of calls to write_setting_s() and write_setting_i(), and
* then close it using close_settings_w(). At the end of this call
* sequence the settings should have been written to the PuTTY
* persistent storage area.
*
* A given key will be written at most once while saving a session.
* Keys may be up to 255 characters long. String values have no length
* limit.
*
* Any returned error message must be freed after use.
*/
settings_w *open_settings_w(const char *sessionname, char **errmsg);
void write_setting_s(settings_w *handle, const char *key, const char *value);
void write_setting_i(settings_w *handle, const char *key, int value);
void write_setting_filename(settings_w *handle,
const char *key, Filename *value);
void write_setting_fontspec(settings_w *handle,
const char *key, FontSpec *font);
void close_settings_w(settings_w *handle);
/*
* Read a saved session. The caller is expected to call
* open_setting_r() to get a `void *' handle, then pass that to a
* number of calls to read_setting_s() and read_setting_i(), and
* then close it using close_settings_r().
*
* read_setting_s() returns a dynamically allocated string which the
* caller must free. read_setting_filename() and
* read_setting_fontspec() likewise return dynamically allocated
* structures.
*
* If a particular string setting is not present in the session,
* read_setting_s() can return NULL, in which case the caller
* should invent a sensible default. If an integer setting is not
* present, read_setting_i() returns its provided default.
*/
settings_r *open_settings_r(const char *sessionname);
char *read_setting_s(settings_r *handle, const char *key);
int read_setting_i(settings_r *handle, const char *key, int defvalue);
Filename *read_setting_filename(settings_r *handle, const char *key);
FontSpec *read_setting_fontspec(settings_r *handle, const char *key);
void close_settings_r(settings_r *handle);
/*
* Delete a whole saved session.
*/
void del_settings(const char *sessionname);
/*
* Enumerate all saved sessions.
*/
settings_e *enum_settings_start(void);
bool enum_settings_next(settings_e *handle, strbuf *out);
void enum_settings_finish(settings_e *handle);
/* ----------------------------------------------------------------------
* Functions to access PuTTY's host key database.
*/
/*
* See if a host key matches the database entry. Return values can
* be 0 (entry matches database), 1 (entry is absent in database),
* or 2 (entry exists in database and is different).
*/
int check_stored_host_key(const char *hostname, int port,
const char *keytype, const char *key);
/*
* Write a host key into the database, overwriting any previous
* entry that might have been there.
*/
void store_host_key(const char *hostname, int port,
const char *keytype, const char *key);
/* ----------------------------------------------------------------------
* Functions to access PuTTY's configuration for trusted host
* certification authorities. This must be stored separately from the
* saved-session data, because the whole point is to avoid having to
* configure CAs separately per session.
*/
struct host_ca {
char *name;
strbuf *ca_public_key;
char *validity_expression;
ca_options opts;
};
host_ca_enum *enum_host_ca_start(void);
bool enum_host_ca_next(host_ca_enum *handle, strbuf *out);
void enum_host_ca_finish(host_ca_enum *handle);
host_ca *host_ca_load(const char *name);
char *host_ca_save(host_ca *); /* NULL on success, or dynamic error msg */
char *host_ca_delete(const char *name); /* likewise */
host_ca *host_ca_new(void); /* initialises to default settings */
void host_ca_free(host_ca *);
/* ----------------------------------------------------------------------
* Functions to access PuTTY's random number seed file.
*/
typedef void (*noise_consumer_t) (void *data, int len);
/*
* Read PuTTY's random seed file and pass its contents to a noise
* consumer function.
*/
void read_random_seed(noise_consumer_t consumer);
/*
* Write PuTTY's random seed file from a given chunk of noise.
*/
void write_random_seed(void *data, int len);
/* ----------------------------------------------------------------------
* Cleanup function: remove all of PuTTY's persistent state.
*/
void cleanup_all(void);
#endif
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