3 * $Id: pixie.h,v 1.3 2004/04/08 01:36:15 mdw Exp $
5 * Passphrase pixie definitions (Unix-specific)
7 * (c) 1999 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of Catacomb.
14 * Catacomb is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU Library General Public License as
16 * published by the Free Software Foundation; either version 2 of the
17 * License, or (at your option) any later version.
19 * Catacomb is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU Library General Public License for more details.
24 * You should have received a copy of the GNU Library General Public
25 * License along with Catacomb; if not, write to the Free
26 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
30 #ifndef CATACOMB_PIXIE_H
31 #define CATACOMB_PIXIE_H
37 /*----- Header files ------------------------------------------------------*/
41 #include <sys/socket.h>
44 #ifndef CATACOMB_PASSPHRASE_H
45 # include "passphrase.h"
48 /*----- Protocol definition -----------------------------------------------*
50 * The protocol is simple and text-based. The client connects to the
51 * server's socket and sends `request lines', each of which elicits one or
52 * more `response lines' from the server. Request and response lines contain
53 * whitespace-separated fields, and are terminated by a single linefeed. The
54 * final field on a line may contain whitespace. The first field describes
55 * the type of the line. The type field is not case-sensitive, although
56 * writing them in uppercase is conventional.
61 * Provide (very) brief help with the pixie protocol.
64 * Return a list of passphrases currently stored, together with expiry
68 * Request the passphrase named `tag' from the pixie.
71 * Request a new passphrase, which therefore requires verification.
73 * SET tag [expire] -- phrase
74 * Set the value of passphrase `tag'. This will usually be a follow-up
75 * to a MISSING response.
78 * Flush the passphrase named `tag', or all passphrases, from memory.
81 * Requests that the pixie close down.
83 * Response lines are as follows:
86 * Request completed successfully. If a passphrase was requested, it is
87 * returned by the pixie. This is the final response to a request.
90 * The passphrase requested is not known, and no requester mechanism is
91 * present. The client should request the passphrase itself and pass it
92 * back to the pixie. This is the final response to a request.
95 * Reports an error. The message given is intended to be
96 * human-readable. This is the final response to a request.
99 * Reports a human-readable informational message. Further responses
103 * Reports a passphrase in response to a LIST request. One ITEM
104 * response is given for each passphrase currently in memory. An OK or
105 * FAIL response follows the last ITEM.
107 * Expiry times in requests may be given in any format acceptable to
108 * `getdate'. Expiry times in responses are returned in ISO format
109 * (YYYY-MM-DD HH:MM:SS ZZZ) and are expressed relative to local time.
112 /*----- Functions provided ------------------------------------------------*/
114 /* --- @pixie_open@ --- *
116 * Arguments: @const char *sock@ = path to pixie socket
118 * Returns: Less than zero if it failed, or file descriptor.
120 * Use: Opens a connection to a passphrase pixie.
123 extern int pixie_open(const char */*sock*/);
125 /* --- @pixie_read@ --- *
127 * Arguments: @int fd@ = connection to passphrase pixie
128 * @const char *tag@ = pointer to tag string
129 * @unsigned mode@ = reading mode
130 * @char *buf@ = pointer to destination buffer
131 * @size_t sz@ = size of the buffer
133 * Returns: Zero if all went well, @-1@ if the read fails, @+1@ to
134 * request the passphrase from the user.
136 * Use: Reads a passphrase from the pixie.
139 extern int pixie_read(int /*fd*/, const char */*tag*/, unsigned /*mode*/,
140 char */*buf*/, size_t /*sz*/);
142 /* --- @pixie_set@ --- *
144 * Arguments: @int fd@ = pixie file descriptor
145 * @const char *tag@ = pointer to tag string
146 * @const char *phrase@ = pointer to passphrase string
150 * Use: Sends a passphrase to the passphrase pixie.
153 extern void pixie_set(int /*fd*/, const char */*tag*/,
154 const char */*phrase*/);
156 /* --- @pixie_cancel@ --- *
158 * Arguments: @int fd@ = pixie file descriptor
159 * @const char *tag@ = pointer to tag string
163 * Use: Cancels a passphrase if it turns out to be bogus.
166 extern void pixie_cancel(int /*fd*/, const char */*tag*/);
168 /* --- @pixie_address@ --- *
170 * Arguments: @const char *sock@ = pointer to socket name
171 * @size_t *psz@ = where to write the address size
173 * Returns: Pointer to filled-in Unix-domain socket address.
175 * Use: Returns a Unix-domain socket address to use to find the
179 extern struct sockaddr_un *pixie_address(const char */*sock*/,
182 /* --- @pixie_fdline@ --- *
184 * Arguments: @int fd@ = file descriptor to read from
185 * @char *buf@ = pointer to buffer
186 * @size_t sz@ = size of buffer
190 * Use: Reads a line from a file descriptor. The read is done one
191 * character at a time. If the entire line won't fit, the end
192 * is truncated. The line is null terminated.
195 extern void pixie_fdline(int /*fd*/, char */*buf*/, size_t /*sz*/);
197 /* --- @pixie_getpass@ --- *
199 * Arguments: @const char *prompt@ = pointer to prompt string
200 * @char *buf@ = pointer to buffer
201 * @size_t sz@ = size of buffer
203 * Returns: Zero if it worked OK, nonzero otherwise.
205 * Use: Reads a passphrase from the terminal or some other requested
209 extern int pixie_getpass(const char */*prompt*/,
210 char */*buf*/, size_t /*sz*/);
212 /*----- That's all, folks -------------------------------------------------*/