/* -*-c-*-
*
- * $Id: pixie-common.c,v 1.2 2004/04/08 01:36:15 mdw Exp $
+ * $Id$
*
* Common code for Pixie client and server (Unix-specific)
*
#include <mLib/alloc.h>
#include <mLib/dstr.h>
+#include <mLib/str.h>
#include "pixie.h"
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 -------------------------------------------------*/