From ca48b27fe78b91a38e6f8204845f183a19f53920 Mon Sep 17 00:00:00 2001
From: Luke Howard <lukeh@padl.com>
Date: Sun, 20 Mar 2011 23:31:32 +1100
Subject: [PATCH] add _gsskrb5_pname_to_uid implementation

---
 lib/gssapi/Makefile.am         |  1 +
 lib/gssapi/krb5/external.c     |  2 +-
 lib/gssapi/krb5/pname_to_uid.c | 80 ++++++++++++++++++++++++++++++++++
 3 files changed, 82 insertions(+), 1 deletion(-)
 create mode 100644 lib/gssapi/krb5/pname_to_uid.c

diff --git a/lib/gssapi/Makefile.am b/lib/gssapi/Makefile.am
index a321efd01..10d9a9bd9 100644
--- a/lib/gssapi/Makefile.am
+++ b/lib/gssapi/Makefile.am
@@ -59,6 +59,7 @@ krb5src = \
 	krb5/inquire_mechs_for_name.c \
 	krb5/inquire_names_for_mech.c \
 	krb5/inquire_sec_context_by_oid.c \
+	krb5/pname_to_uid.c \
 	krb5/process_context_token.c \
 	krb5/prf.c \
 	krb5/release_buffer.c \
diff --git a/lib/gssapi/krb5/external.c b/lib/gssapi/krb5/external.c
index 43d17dbe5..59d5bba7b 100644
--- a/lib/gssapi/krb5/external.c
+++ b/lib/gssapi/krb5/external.c
@@ -326,7 +326,7 @@ static gssapi_mech_interface_desc krb5_mech = {
     sizeof(krb5_mo) / sizeof(krb5_mo[0]),
     NULL,
     _gsskrb5_userok,
-    NULL
+    _gsskrb5_pname_to_uid
 };
 
 gssapi_mech_interface
diff --git a/lib/gssapi/krb5/pname_to_uid.c b/lib/gssapi/krb5/pname_to_uid.c
new file mode 100644
index 000000000..135e703e3
--- /dev/null
+++ b/lib/gssapi/krb5/pname_to_uid.c
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2011, PADL Software Pty Ltd.
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * 3. Neither the name of PADL Software nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY PADL SOFTWARE 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 PADL SOFTWARE 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.
+ */
+
+#include "gsskrb5_locl.h"
+
+OM_uint32
+_gsskrb5_pname_to_uid(OM_uint32 *minor_status,
+                      const gss_name_t pname,
+                      const gss_OID mech_type,
+                      uid_t *uidp) 
+{
+    krb5_error_code ret;
+    krb5_context context;
+    krb5_const_principal princ = (krb5_const_principal)pname;
+    char localname[256];
+#ifdef POSIX_GETPWNAM_R
+    char pwbuf[2048];
+    struct passwd pw, *pwd;
+#else
+    struct passwd *pwd;
+#endif
+
+    GSSAPI_KRB5_INIT(&context);
+
+    *minor_status = 0;
+
+    ret = krb5_aname_to_localname(context, princ,
+                                  sizeof(localname), localname);
+    if (ret != 0) {
+        *minor_status = ret;
+        return GSS_S_FAILURE;
+    }
+
+#ifdef POSIX_GETPWNAM_R
+    if (getpwnam_r(localname, &pw, pwbuf, sizeof(pwbuf), &pwd) != 0) {
+        *minor_status = KRB5_NO_LOCALNAME;
+        return GSS_S_FAILURE;
+    }
+#else
+    pwd = getpwnam(localname);
+#endif
+
+    if (pwd == NULL) {
+        *minor_status = KRB5_NO_LOCALNAME;
+        return GSS_S_FAILURE;
+    }
+
+    *uidp = pwd->pw_uid;
+
+    return GSS_S_COMPLETE;
+}