--- /dev/null
+/* -*-c-*-
+ *
+ * $Id: pixie-common.c,v 1.1 1999/12/22 15:58:41 mdw Exp $
+ *
+ * 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.
+ */
+
+/*----- Revision history --------------------------------------------------*
+ *
+ * $Log: pixie-common.c,v $
+ * Revision 1.1 1999/12/22 15:58:41 mdw
+ * Passphrase pixie support.
+ *
+ */
+
+/*----- 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 "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);
+}
+
+
+/*----- That's all, folks -------------------------------------------------*/
+