Add helper API for finding auth file path

* src/util/virauth.c, src/util/virauth.h: Add virAuthGetConfigFilePath
* include/libvirt/virterror.h, src/util/virterror.c: Add
  VIR_FROM_AUTH error domain

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>

tests/Makefile.am

@@ -96,7 +96,8 @@ check_PROGRAMS = virshtest conftest sockettest \
 	commandtest commandhelper seclabeltest \
 	virhashtest virnetmessagetest virnetsockettest ssh \
 	utiltest virnettlscontexttest shunloadtest \
-	virtimetest viruritest virkeyfiletest
+	virtimetest viruritest virkeyfiletest \
+	virauthconfigtest
 
 check_LTLIBRARIES = libshunload.la
 
@@ -221,6 +222,7 @@ TESTS = virshtest \
 	virtimetest \
 	viruritest \
 	virkeyfiletest \
+	virauthconfigtest \
 	shunloadtest \
 	utiltest \
 	$(test_scripts)
@@ -518,6 +520,11 @@ virkeyfiletest_SOURCES = \
 virkeyfiletest_CFLAGS = -Dabs_builddir="\"$(abs_builddir)\"" $(AM_CFLAGS)
 virkeyfiletest_LDADD = ../src/libvirt-net-rpc.la $(LDADDS)
 
+virauthconfigtest_SOURCES = \
+	virauthconfigtest.c testutils.h testutils.c
+virauthconfigtest_CFLAGS = -Dabs_builddir="\"$(abs_builddir)\"" $(AM_CFLAGS)
+virauthconfigtest_LDADD = ../src/libvirt-net-rpc.la $(LDADDS)
+
 seclabeltest_SOURCES = \
 	seclabeltest.c
 seclabeltest_LDADD = ../src/libvirt_driver_security.la $(LDADDS)

tests/virauthconfigtest.c

@@ -0,0 +1,140 @@
+/*
+ * Copyright (C) 2012 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
+ *
+ * Author: Daniel P. Berrange <berrange@redhat.com>
+ */
+
+#include <config.h>
+
+#include <stdlib.h>
+#include <signal.h>
+
+#include "testutils.h"
+#include "util.h"
+#include "virterror_internal.h"
+#include "memory.h"
+#include "logging.h"
+
+#include "virauthconfig.h"
+
+#define VIR_FROM_THIS VIR_FROM_RPC
+
+struct ConfigLookupData {
+    virAuthConfigPtr config;
+    const char *hostname;
+    const char *service;
+    const char *credname;
+    const char *expect;
+};
+
+static int testAuthLookup(const void *args)
+{
+    int ret = -1;
+    const struct ConfigLookupData *data = args;
+    const char *actual = NULL;
+    int rv;
+
+    rv = virAuthConfigLookup(data->config,
+                             data->service,
+                             data->hostname,
+                             data->credname,
+                             &actual);
+
+    if (rv < 0)
+        goto cleanup;
+
+    if (data->expect) {
+        if (!actual ||
+            !STREQ(actual, data->expect)) {
+            VIR_WARN("Expected value '%s' for '%s' '%s' '%s', but got '%s'",
+                     data->expect, data->hostname,
+                     data->service, data->credname,
+                     NULLSTR(actual));
+            goto cleanup;
+        }
+    } else {
+        if (actual) {
+            VIR_WARN("Did not expect a value for '%s' '%s' '%s', but got '%s'",
+                     data->hostname,
+                     data->service, data->credname,
+                     actual);
+            goto cleanup;
+        }
+    }
+
+    ret = 0;
+cleanup:
+    return ret;
+}
+
+
+static int
+mymain(void)
+{
+    int ret = 0;
+
+    virAuthConfigPtr config;
+
+    signal(SIGPIPE, SIG_IGN);
+
+#define TEST_LOOKUP(config, hostname, service, credname, expect)        \
+    do  {                                                               \
+        const struct ConfigLookupData data = {                          \
+            config, hostname, service, credname, expect                 \
+        };                                                              \
+        if (virtTestRun("Test Lookup " hostname "-" service "-" credname, \
+                        1, testAuthLookup, &data) < 0)                   \
+            ret = -1;                                                   \
+    } while (0)
+
+    const char *confdata =
+        "[credentials-test]\n"
+        "username=fred\n"
+        "password=123456\n"
+        "\n"
+        "[credentials-prod]\n"
+        "username=bar\n"
+        "password=letmein\n"
+        "\n"
+        "[auth-libvirt-test1.example.com]\n"
+        "credentials=test\n"
+        "\n"
+        "[auth-libvirt-test2.example.com]\n"
+        "credentials=test\n"
+        "\n"
+        "[auth-libvirt-demo3.example.com]\n"
+        "credentials=test\n"
+        "\n"
+        "[auth-libvirt-prod1.example.com]\n"
+        "credentials=prod\n";
+
+    if (!(config = virAuthConfigNewData("auth.conf", confdata, strlen(confdata))))
+        return EXIT_FAILURE;
+
+    TEST_LOOKUP(config, "test1.example.com", "libvirt", "username", "fred");
+    TEST_LOOKUP(config, "test1.example.com", "vnc", "username", NULL);
+    TEST_LOOKUP(config, "test1.example.com", "libvirt", "realm", NULL);
+    TEST_LOOKUP(config, "test66.example.com", "libvirt", "username", NULL);
+    TEST_LOOKUP(config, "prod1.example.com", "libvirt", "username", "bar");
+    TEST_LOOKUP(config, "prod1.example.com", "libvirt", "password", "letmein");
+
+    virAuthConfigFree(config);
+
+    return (ret==0 ? EXIT_SUCCESS : EXIT_FAILURE);
+}
+
+VIRT_TEST_MAIN(mymain)