3 * Common code for Pixie client and server (Unix-specific)
5 * (c) 1999 Straylight/Edgeware
8 /*----- Licensing notice --------------------------------------------------*
10 * This file is part of Catacomb.
12 * Catacomb is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU Library General Public License as
14 * published by the Free Software Foundation; either version 2 of the
15 * License, or (at your option) any later version.
17 * Catacomb is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU Library General Public License for more details.
22 * You should have received a copy of the GNU Library General Public
23 * License along with Catacomb; if not, write to the Free
24 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
28 /*----- Header files ------------------------------------------------------*/
36 #include <sys/types.h>
42 #include <sys/socket.h>
45 #include <mLib/alloc.h>
46 #include <mLib/dstr.h>
47 #include <mLib/macros.h>
52 /*----- Main code ---------------------------------------------------------*/
54 /* --- @pixie_address@ --- *
56 * Arguments: @const char *sock@ = pointer to socket name
57 * @size_t *psz@ = where to write the address size
59 * Returns: Pointer to filled-in Unix-domain socket address.
61 * Use: Returns a Unix-domain socket address to use to find the
65 struct sockaddr_un
*pixie_address(const char *sock
, size_t *psz
)
69 /* --- Get the default socket path if none specified --- */
72 sock
= getenv("CATACOMB_PIXIE_SOCKET");
74 sock
= "%h/.catacomb/pixie";
76 /* --- Substitute interesting sequences in the path --- */
94 qq
= getenv("LOGNAME");
96 struct passwd
*pw
= getpwuid(getuid());
107 struct passwd
*pw
= getpwuid(getuid());
125 /* --- Allocate and initialize the socket address --- */
128 struct sockaddr_un
*sun
;
129 size_t bsz
= offsetof(struct sockaddr_un
, sun_path
);
130 *psz
= bsz
+ d
.len
+ 1;
131 sun
= xmalloc(bsz
+ d
.len
+ 1);
133 sun
->sun_family
= AF_UNIX
;
134 memcpy(sun
->sun_path
, d
.buf
, d
.len
+ 1);
140 /* --- @pixie_fdline@ --- *
142 * Arguments: @int fd@ = file descriptor to read from
143 * @char *buf@ = pointer to buffer
144 * @size_t sz@ = size of buffer
148 * Use: Reads a line from a file descriptor. The read is done one
149 * character at a time. If the entire line won't fit, the end
150 * is truncated. The line is null terminated.
153 void pixie_fdline(int fd
, char *buf
, size_t sz
)
156 char *q
= p
+ sz
- 1;
160 if (read(fd
, &c
, 1) < 1)
170 /* --- @pixie_getpass@ --- *
172 * Arguments: @const char *prompt@ = pointer to prompt string
173 * @char *buf@ = pointer to buffer
174 * @size_t sz@ = size of buffer
176 * Returns: Zero if it worked OK, nonzero otherwise.
178 * Use: Reads a passphrase from the terminal or some other requested
182 int pixie_getpass(const char *prompt
, char *buf
, size_t sz
)
184 const char *pfd
= getenv("CATACOMB_PASSPHRASE_FD");
190 /* --- See whether a terminal is what's wanted --- */
194 pixie_fdline(fd
, buf
, sz
);
196 if ((fd
= open("/dev/tty", O_RDWR
)) < 0)
198 if (tcgetattr(fd
, &ta
) < 0)
201 ta
.c_lflag
&= ~(ECHO
| ISIG
);
202 if (tcsetattr(fd
, TCSAFLUSH
, &ta
)) goto fail_1
;
203 if (write(fd
, prompt
, strlen(prompt
)) < 0) goto fail_2
;
204 pixie_fdline(fd
, buf
, sz
);
205 tcsetattr(fd
, TCSAFLUSH
, &ota
);
206 if (write(fd
, &nl
, 1) < 0) goto fail_1
;
211 /* --- Tidy up if things went wrong --- */
214 tcsetattr(fd
, TCSAFLUSH
, &ota
);
221 /* --- @pixie_open@ --- *
223 * Arguments: @const char *sock@ = path to pixie socket
225 * Returns: Less than zero if it failed, or file descriptor.
227 * Use: Opens a connection to a passphrase pixie.
230 int pixie_open(const char *sock
)
232 struct sockaddr_un
*sun
;
236 /* --- Open the connection --- */
238 if ((fd
= socket(PF_UNIX
, SOCK_STREAM
, 0)) < 0)
240 sun
= pixie_address(sock
, &sz
);
241 if (connect(fd
, (struct sockaddr
*)sun
, sz
))
246 /* --- Tidy up if things went wrong --- */
255 /* --- @pixie_read@ --- *
257 * Arguments: @int fd@ = connection to passphrase pixie
258 * @const char *tag@ = pointer to tag string
259 * @unsigned mode@ = reading mode
260 * @char *buf@ = pointer to destination buffer
261 * @size_t sz@ = size of the buffer
263 * Returns: Zero if all went well, @-1@ if the read fails, @+1@ to
264 * request the passphrase from the user.
266 * Use: Reads a passphrase from the pixie.
269 int pixie_read(int fd
, const char *tag
, unsigned mode
, char *buf
, size_t sz
)
274 /* --- Send the request --- */
276 dstr_putf(&d
, "%s %s\n", mode
== PMODE_READ ?
"PASS" : "VERIFY", tag
);
277 if (write(fd
, d
.buf
, d
.len
) < 0) return (-1);
280 /* --- Sort out the result --- */
283 pixie_fdline(fd
, buf
, sz
);
285 if ((q
= str_getword(&p
)) == 0)
287 if (STRCMP(q
, ==, "INFO"))
289 else if (STRCMP(q
, ==, "MISSING"))
291 else if (STRCMP(q
, !=, "OK"))
294 /* --- Return the final answer --- */
297 memmove(buf
, p
, strlen(p
) + 1);
303 /* --- @pixie_set@ --- *
305 * Arguments: @int fd@ = pixie file descriptor
306 * @const char *tag@ = pointer to tag string
307 * @const char *phrase@ = pointer to passphrase string
311 * Use: Sends a passphrase to the passphrase pixie.
314 void pixie_set(int fd
, const char *tag
, const char *phrase
)
318 size_t sz
= strlen(phrase
);
322 /* --- Send the request --- *
324 * I didn't want to copy it out of the caller's buffer. @writev@ may
325 * produce a copy, too, so I didn't do that either.
328 dstr_putf(&d
, "SET %s -- ", tag
);
329 if (write(fd
, d
.buf
, d
.len
) < 0 ||
330 write(fd
, phrase
, sz
) < 0 ||
331 write(fd
, &nl
, 1) < 0)
335 /* --- Pick up the pieces --- */
338 pixie_fdline(fd
, buf
, sizeof(buf
));
340 if ((q
= str_getword(&p
)) != 0 && STRCMP(q
, ==, "INFO"))
344 /* --- @pixie_cancel@ --- *
346 * Arguments: @int fd@ = pixie file descriptor
347 * @const char *tag@ = pointer to tag string
351 * Use: Cancels a passphrase if it turns out to be bogus.
354 void pixie_cancel(int fd
, const char *tag
)
360 /* --- Send the request --- */
362 dstr_putf(&d
, "FLUSH %s\n", tag
);
363 if (write(fd
, d
.buf
, d
.len
) < 0) return;
366 /* --- Sort out the result --- */
369 pixie_fdline(fd
, buf
, sizeof(buf
));
371 if ((q
= str_getword(&p
)) != 0 && STRCMP(q
, ==, "INFO"))
375 /*----- That's all, folks -------------------------------------------------*/