+++ /dev/null
-/* -*-c-*-
- *
- * $Id$
- *
- * Common code for Pixie client and server (Unix-specific)
- *
- * (c) 1999 Straylight/Edgeware
- */
-
-/*----- Licensing notice --------------------------------------------------*
- *
- * This file is part of Catacomb.
- *
- * Catacomb is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Library General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * Catacomb 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 Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with Catacomb; if not, write to the Free
- * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- * MA 02111-1307, USA.
- */
-
-/*----- Header files ------------------------------------------------------*/
-
-#include <errno.h>
-#include <stddef.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include <sys/types.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <termios.h>
-#include <pwd.h>
-
-#include <sys/socket.h>
-#include <sys/un.h>
-
-#include <mLib/alloc.h>
-#include <mLib/dstr.h>
-#include <mLib/str.h>
-
-#include "pixie.h"
-
-/*----- Main code ---------------------------------------------------------*/
-
-/* --- @pixie_address@ --- *
- *
- * Arguments: @const char *sock@ = pointer to socket name
- * @size_t *psz@ = where to write the address size
- *
- * Returns: Pointer to filled-in Unix-domain socket address.
- *
- * Use: Returns a Unix-domain socket address to use to find the
- * passphrase pixie.
- */
-
-struct sockaddr_un *pixie_address(const char *sock, size_t *psz)
-{
- dstr d = DSTR_INIT;
-
- /* --- Get the default socket path if none specified --- */
-
- if (!sock)
- sock = getenv("CATACOMB_PIXIE_SOCKET");
- if (!sock)
- sock = "%h/.catacomb/pixie";
-
- /* --- Substitute interesting sequences in the path --- */
-
- {
- const char *q, *qq;
-
- q = sock;
- for (;;) {
- qq = strchr(q, '%');
- if (!qq || !qq[1]) {
- DPUTS(&d, q);
- break;
- }
- DPUTM(&d, q, qq - q);
- q = qq + 1;
- switch (*q) {
- case 'u':
- qq = getenv("USER");
- if (!qq)
- qq = getenv("LOGNAME");
- if (!qq) {
- struct passwd *pw = getpwuid(getuid());
- if (pw)
- qq = pw->pw_name;
- else
- qq = "<unknown>";
- }
- DPUTS(&d, qq);
- break;
- case 'h':
- qq = getenv("HOME");
- if (!qq) {
- struct passwd *pw = getpwuid(getuid());
- if (pw)
- qq = pw->pw_dir;
- else
- qq = "<unknown>";
- }
- DPUTS(&d, qq);
- break;
- default:
- DPUTC(&d, '%');
- DPUTC(&d, *q);
- break;
- }
- q++;
- }
- DPUTZ(&d);
- }
-
- /* --- Allocate and initialize the socket address --- */
-
- {
- struct sockaddr_un *sun;
- size_t bsz = offsetof(struct sockaddr_un, sun_path);
- *psz = bsz + d.len + 1;
- sun = xmalloc(bsz + d.len + 1);
- memset(sun, 0, bsz);
- sun->sun_family = AF_UNIX;
- memcpy(sun->sun_path, d.buf, d.len + 1);
- dstr_destroy(&d);
- return (sun);
- }
-}
-
-/* --- @pixie_fdline@ --- *
- *
- * Arguments: @int fd@ = file descriptor to read from
- * @char *buf@ = pointer to buffer
- * @size_t sz@ = size of buffer
- *
- * Returns: ---
- *
- * Use: Reads a line from a file descriptor. The read is done one
- * character at a time. If the entire line won't fit, the end
- * is truncated. The line is null terminated.
- */
-
-void pixie_fdline(int fd, char *buf, size_t sz)
-{
- char *p = buf;
- char *q = p + sz - 1;
-
- for (;;) {
- char c;
- if (read(fd, &c, 1) < 1)
- break;
- if (c == '\n')
- break;
- if (p < q)
- *p++ = c;
- }
- *p = 0;
-}
-
-/* --- @pixie_getpass@ --- *
- *
- * Arguments: @const char *prompt@ = pointer to prompt string
- * @char *buf@ = pointer to buffer
- * @size_t sz@ = size of buffer
- *
- * Returns: Zero if it worked OK, nonzero otherwise.
- *
- * Use: Reads a passphrase from the terminal or some other requested
- * source.
- */
-
-int pixie_getpass(const char *prompt, char *buf, size_t sz)
-{
- const char *pfd = getenv("CATACOMB_PASSPHRASE_FD");
- int fd = 0;
-
- /* --- See whether a terminal is what's wanted --- */
-
- if (pfd) {
- fd = atoi(pfd);
- pixie_fdline(fd, buf, sz);
- } else {
- struct termios ta;
- struct termios ota;
- char nl = '\n';
-
- if ((fd = open("/dev/tty", O_RDWR)) < 0)
- goto fail_0;
- if (tcgetattr(fd, &ta) < 0)
- goto fail_1;
- ota = ta;
- ta.c_lflag &= ~(ECHO | ISIG);
- if (tcsetattr(fd, TCSAFLUSH, &ta))
- goto fail_1;
- write(fd, prompt, strlen(prompt));
- pixie_fdline(fd, buf, sz);
- tcsetattr(fd, TCSAFLUSH, &ota);
- write(fd, &nl, 1);
- close(fd);
- }
- return (0);
-
- /* --- Tidy up if things went wrong --- */
-
-fail_1:
- close(fd);
-fail_0:
- return (-1);
-}
-
-/* --- @pixie_open@ --- *
- *
- * Arguments: @const char *sock@ = path to pixie socket
- *
- * Returns: Less than zero if it failed, or file descriptor.
- *
- * Use: Opens a connection to a passphrase pixie.
- */
-
-int pixie_open(const char *sock)
-{
- struct sockaddr_un *sun;
- size_t sz;
- int fd;
-
- /* --- Open the connection --- */
-
- if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
- goto fail_0;
- sun = pixie_address(sock, &sz);
- if (connect(fd, (struct sockaddr *)sun, sz))
- goto fail_1;
- xfree(sun);
- return (fd);
-
- /* --- Tidy up if things went wrong --- */
-
-fail_1:
- xfree(sun);
- close(fd);
-fail_0:
- return (-1);
-}
-
-/* --- @pixie_read@ --- *
- *
- * Arguments: @int fd@ = connection to passphrase pixie
- * @const char *tag@ = pointer to tag string
- * @unsigned mode@ = reading mode
- * @char *buf@ = pointer to destination buffer
- * @size_t sz@ = size of the buffer
- *
- * Returns: Zero if all went well, @-1@ if the read fails, @+1@ to
- * request the passphrase from the user.
- *
- * Use: Reads a passphrase from the pixie.
- */
-
-int pixie_read(int fd, const char *tag, unsigned mode, char *buf, size_t sz)
-{
- dstr d = DSTR_INIT;
- char *p, *q;
-
- /* --- Send the request --- */
-
- dstr_putf(&d, "%s %s\n", mode == PMODE_READ ? "PASS" : "VERIFY", tag);
- write(fd, d.buf, d.len);
- dstr_destroy(&d);
-
- /* --- Sort out the result --- */
-
-again:
- pixie_fdline(fd, buf, sz);
- p = buf;
- if ((q = str_getword(&p)) == 0)
- return (-1);
- if (strcmp(q, "INFO") == 0)
- goto again;
- else if (strcmp(q, "MISSING") == 0)
- return (+1);
- else if (strcmp(q, "OK") != 0)
- return (-1);
-
- /* --- Return the final answer --- */
-
- if (p)
- memmove(buf, p, strlen(p) + 1);
- else
- *buf = 0;
- return (0);
-}
-
-/* --- @pixie_set@ --- *
- *
- * Arguments: @int fd@ = pixie file descriptor
- * @const char *tag@ = pointer to tag string
- * @const char *phrase@ = pointer to passphrase string
- *
- * Returns: ---
- *
- * Use: Sends a passphrase to the passphrase pixie.
- */
-
-void pixie_set(int fd, const char *tag, const char *phrase)
-{
- dstr d = DSTR_INIT;
- char buf[16];
- size_t sz = strlen(phrase);
- char nl = '\n';
- char *p, *q;
-
- /* --- Send the request --- *
- *
- * I didn't want to copy it out of the caller's buffer. @writev@ may
- * produce a copy, too, so I didn't do that either.
- */
-
- dstr_putf(&d, "SET %s -- ", tag);
- write(fd, d.buf, d.len);
- write(fd, phrase, sz);
- write(fd, &nl, 1);
- dstr_destroy(&d);
-
- /* --- Pick up the pieces --- */
-
-again:
- pixie_fdline(fd, buf, sizeof(buf));
- p = buf;
- if ((q = str_getword(&p)) != 0 && strcmp(q, "INFO") == 0)
- goto again;
-}
-
-/* --- @pixie_cancel@ --- *
- *
- * Arguments: @int fd@ = pixie file descriptor
- * @const char *tag@ = pointer to tag string
- *
- * Returns: ---
- *
- * Use: Cancels a passphrase if it turns out to be bogus.
- */
-
-void pixie_cancel(int fd, const char *tag)
-{
- dstr d = DSTR_INIT;
- char buf[16];
- char *p, *q;
-
- /* --- Send the request --- */
-
- dstr_putf(&d, "FLUSH %s\n", tag);
- write(fd, d.buf, d.len);
- dstr_destroy(&d);
-
- /* --- Sort out the result --- */
-
-again:
- pixie_fdline(fd, buf, sizeof(buf));
- p = buf;
- if ((q = str_getword(&p)) != 0 && strcmp(q, "INFO") == 0)
- goto again;
-}
-
-/*----- That's all, folks -------------------------------------------------*/
-
projects / u / mdw / catacomb / blobdiff