Add an implementation of the RPCSEC_GSS authentication protocol for RPC. This

is based on an old implementation from the University of Michigan with lots of
changes and fixes by me and the addition of a Solaris-compatible API.

Sponsored by:	Isilon Systems
Reviewed by:	alfred

kerberos5/lib/libgssapi_krb5/Makefile

@@ -46,6 +46,7 @@ SRCS=	8003.c \
 	inquire_mechs_for_name.c \
 	inquire_names_for_mech.c \
 	inquire_sec_context_by_oid.c \
+	pname_to_uid.c \
 	prefix.c \
 	prf.c \
 	process_context_token.c \

kerberos5/lib/libgssapi_krb5/pname_to_uid.c

@@ -0,0 +1,59 @@
+/*-
+ * Copyright (c) 2008 Isilon Inc http://www.isilon.com/
+ * Authors: Doug Rabson <dfr@rabson.org>
+ * Developed with Red Inc: Alfred Perlstein <alfred@freebsd.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+/* $FreeBSD$ */
+
+#include <pwd.h>
+
+#include "krb5/gsskrb5_locl.h"
+
+OM_uint32
+_gsskrb5_pname_to_uid(OM_uint32 *minor_status, const gss_name_t pname,
+    const gss_OID mech, uid_t *uidp)
+{
+	krb5_context context;
+	krb5_const_principal name = (krb5_const_principal) pname;
+	krb5_error_code kret;
+	char lname[MAXLOGNAME + 1], buf[128];
+	struct passwd pwd, *pw;
+
+	GSSAPI_KRB5_INIT (&context);
+
+	kret = krb5_aname_to_localname(context, name, sizeof(lname), lname);
+	if (kret) {
+		*minor_status = kret;
+		return (GSS_S_FAILURE);
+	}
+
+	*minor_status = 0;
+	getpwnam_r(lname, &pwd, buf, sizeof(buf), &pw);
+	if (pw) {
+		*uidp = pw->pw_uid;
+		return (GSS_S_COMPLETE);
+	} else {
+		return (GSS_S_FAILURE);
+	}
+}