"Speak" the saslauthd version 1 protocol if "saslauthd_version" is "1".  I
don't think we'll be using this, but here for the sake of completeness.

--- cyrus-sasl-2.1.17/lib/checkpw.c	2003-09-09 11:38:13.000000000 -0400
+++ cyrus-sasl-2.1.17/lib/checkpw.c	2004-01-20 16:57:52.000000000 -0500
@@ -454,7 +454,7 @@
     sasl_getopt_t *getopt;
     void *context;
     char pwpath[sizeof(srvaddr.sun_path)];
-    const char *p = NULL;
+    const char *p = NULL, *q = NULL;
     char *freeme = NULL;
 #ifdef USE_DOORS
     door_arg_t arg;
@@ -463,6 +463,7 @@
     /* check to see if the user configured a rundir */
     if (_sasl_getcallback(conn, SASL_CB_GETOPT, &getopt, &context) == SASL_OK) {
 	getopt(context, NULL, "saslauthd_path", &p, NULL);
+	getopt(context, NULL, "saslauthd_version", &q, NULL);
     }
     if (p) {
 	strncpy(pwpath, p, sizeof(pwpath));
@@ -514,18 +515,22 @@
 	memcpy(query_end, &u_len, sizeof(unsigned short));
 	query_end += sizeof(unsigned short);
 	while (*userid) *query_end++ = *userid++;
+	userid -= ntohs(u_len);
 
 	memcpy(query_end, &p_len, sizeof(unsigned short));
 	query_end += sizeof(unsigned short);
 	while (*passwd) *query_end++ = *passwd++;
+	passwd -= ntohs(p_len);
 
 	memcpy(query_end, &s_len, sizeof(unsigned short));
 	query_end += sizeof(unsigned short);
 	while (*service) *query_end++ = *service++;
+	service -= ntohs(s_len);
 
 	memcpy(query_end, &r_len, sizeof(unsigned short));
 	query_end += sizeof(unsigned short);
 	if (user_realm) while (*user_realm) *query_end++ = *user_realm++;
+	user_realm -= ntohs(r_len);
     }
 
 #ifdef USE_DOORS
@@ -578,6 +583,50 @@
 	}
     }
 
+    if (q && (*q == '1')) {
+ 	struct iovec iov[8];
+	unsigned int u_length, p_length;
+	char buffer[1024];
+
+	u_length = strlen(userid ? userid : "") + 1;
+	p_length = strlen(passwd ? passwd : "") + 1;
+	if (u_length + p_length >= sizeof(query)) {
+	    close(s);
+	    sasl_seterror(conn, 0, "out of memory");
+	    goto fail;
+	}
+
+	memset(buffer, '\0', sizeof(buffer));
+	if (userid != NULL)
+	    memcpy(buffer, userid, u_length);
+	if (passwd != NULL)
+	    memcpy(buffer + u_length, passwd, p_length);        
+
+	iov[0].iov_len = u_length + p_length;
+	iov[0].iov_base = buffer;
+
+	if (retry_writev(s, iov, 1) == -1) {
+	    close(s);
+	    sasl_seterror(conn, 0, "write failed");
+	    goto fail;
+  	}
+
+	if (retry_read(s, buffer, 2) != 2) {
+	    close(s);
+	    sasl_seterror(conn, 0, "read failed");
+	    goto fail;
+	}
+
+	close(s);
+
+	if (strncmp(buffer, "OK", 2) == 0) {
+	    return SASL_OK;
+	}
+  
+	sasl_seterror(conn, SASL_NOLOG, "authentication failed");
+	return SASL_BADAUTH;
+    }
+
     {
  	struct iovec iov[8];