New pixie protocol allowing application to request passphrases and send

[u/mdw/catacomb] / pixie-client.c

diff --git a/pixie-client.c b/pixie-client.c
index 5b7c0dc..f1b8678 100644 (file)
--- a/pixie-client.c
+++ b/pixie-client.c
@@ -1,6 +1,6 @@
 /* -*-c-*-
  *
- * $Id: pixie-client.c,v 1.1 1999/12/22 15:58:41 mdw Exp $
+ * $Id: pixie-client.c,v 1.2 2000/06/17 11:49:37 mdw Exp $
  *
  * Simple passphrase pixie client (Unix-specific)
  *
@@ -30,6 +30,10 @@
 /*----- Revision history --------------------------------------------------* 
  *
  * $Log: pixie-client.c,v $
+ * Revision 1.2  2000/06/17 11:49:37  mdw
+ * New pixie protocol allowing application to request passphrases and send
+ * them to the pixie.
+ *
  * Revision 1.1  1999/12/22 15:58:41  mdw
  * Passphrase pixie support.
  *
@@ -101,7 +105,8 @@ fail_0:
  *             @char *buf@ = pointer to destination buffer
  *             @size_t sz@ = size of the buffer
  *
- * Returns:    Zero if all went well, nonzero if the read fails.
+ * 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.
  */
@@ -126,6 +131,8 @@ again:
     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);
 
@@ -138,6 +145,46 @@ again:
   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