Add IAKERB mechanism and gss_acquire_cred_with_password

Merge branches/iakerb to trunk.  Includes the following:

* New IAKERB mechanism.
* New gss_acquire_cred_with_password mechglue function.
* ASN.1 encoders and decoders for IAKERB structures (with tests).
* New shortcuts in gss-sample client and server.
* Tests to exercise SPNEGO and IAKERB using gss-sample application.

ticket: 6712

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@23960 dc483132-0cff-0310-8789-dd5450dbe970

3 files changed, 136 insertions, 13 deletions

diff --git a/src/appl/gss-sample/gss-client.c b/src/appl/gss-sample/gss-client.c
index ad314c270..d922cc3bd 100644
--- a/src/appl/gss-sample/gss-client.c
+++ b/src/appl/gss-sample/gss-client.c
@@ -64,6 +64,8 @@
 #endif
 
 #include <gssapi/gssapi_generic.h>
+#include <gssapi/gssapi_krb5.h>
+#include <gssapi/gssapi_ext.h>
 #include "gss-misc.h"
 
 static int verbose = 1;
@@ -72,7 +74,7 @@ static void
 usage()
 {
     fprintf(stderr, "Usage: gss-client [-port port] [-mech mechanism] [-d]\n");
-    fprintf(stderr, "       [-seq] [-noreplay] [-nomutual]");
+    fprintf(stderr, "       [-seq] [-noreplay] [-nomutual] [-user user] [-pass pw]");
 #ifdef _WIN32
     fprintf(stderr, " [-threads num]");
 #endif
@@ -162,6 +164,7 @@ connect_to_server(char *host, u_short port)
 static int
 client_establish_context(int s, char *service_name, OM_uint32 gss_flags,
                          int auth_flag, int v1_format, gss_OID oid,
+                         char *username, char *password,
                          gss_ctx_id_t *gss_context, OM_uint32 *ret_flags)
 {
     if (auth_flag) {
@@ -169,6 +172,53 @@ client_establish_context(int s, char *service_name, OM_uint32 gss_flags,
         gss_name_t target_name;
         OM_uint32 maj_stat, min_stat, init_sec_min_stat;
         int token_flags;
+        gss_cred_id_t cred = GSS_C_NO_CREDENTIAL;
+        gss_name_t gss_username = GSS_C_NO_NAME;
+        gss_OID_set_desc mechs, *mechsp = GSS_C_NO_OID_SET;
+
+        if (oid != GSS_C_NO_OID) {
+            mechs.elements = oid;
+            mechs.count = 1;
+            mechsp = &mechs;
+        }
+
+        if (username != NULL) {
+            send_tok.value = username;
+            send_tok.length = strlen(username);
+
+            maj_stat = gss_import_name(&min_stat, &send_tok,
+                                       (gss_OID) gss_nt_user_name,
+                                       &gss_username);
+            if (maj_stat != GSS_S_COMPLETE) {
+                display_status("parsing client name", maj_stat, min_stat);
+                return -1;
+            }
+        }
+
+        if (password != NULL) {
+            gss_buffer_desc pwbuf;
+
+            pwbuf.value = password;
+            pwbuf.length = strlen(password);
+
+            maj_stat = gss_acquire_cred_with_password(&min_stat,
+                                                      gss_username,
+                                                      &pwbuf, 0,
+                                                      mechsp, GSS_C_INITIATE,
+                                                      &cred, NULL, NULL);
+        } else if (gss_username != GSS_C_NO_NAME) {
+            maj_stat = gss_acquire_cred(&min_stat,
+                                        gss_username, 0,
+                                        mechsp, GSS_C_INITIATE,
+                                        &cred, NULL, NULL);
+        } else
+            maj_stat = GSS_S_COMPLETE;
+        if (maj_stat != GSS_S_COMPLETE) {
+            display_status("acquiring creds", maj_stat, min_stat);
+            gss_release_name(&min_stat, &gss_username);
+            return -1;
+        }
+        gss_release_name(&min_stat, &gss_username);
 
         /*
          * Import the name into target_name.  Use send_tok to save
@@ -213,7 +263,7 @@ client_establish_context(int s, char *service_name, OM_uint32 gss_flags,
 
         do {
             maj_stat = gss_init_sec_context(&init_sec_min_stat,
-                                            GSS_C_NO_CREDENTIAL, gss_context,
+                                            cred, gss_context,
                                             target_name, oid, gss_flags, 0,
                                             NULL, /* channel bindings */
                                             token_ptr, NULL, /* mech type */
@@ -260,6 +310,7 @@ client_establish_context(int s, char *service_name, OM_uint32 gss_flags,
                 printf("\n");
         } while (maj_stat == GSS_S_CONTINUE_NEEDED);
 
+        (void) gss_release_cred(&min_stat, &cred);
         (void) gss_release_name(&min_stat, &target_name);
     } else {
         if (send_token(s, TOKEN_NOOP, empty_token) < 0)
@@ -344,7 +395,7 @@ read_file(file_name, in_buf)
 static int
 call_server(host, port, oid, service_name, gss_flags, auth_flag,
             wrap_flag, encrypt_flag, mic_flag, v1_format, msg, use_file,
-            mcount)
+            mcount, username, password)
     char   *host;
     u_short port;
     gss_OID oid;
@@ -355,6 +406,8 @@ call_server(host, port, oid, service_name, gss_flags, auth_flag,
     char   *msg;
     int     use_file;
     int     mcount;
+    char    *username;
+    char    *password;
 {
     gss_ctx_id_t context;
     gss_buffer_desc in_buf, out_buf;
@@ -380,7 +433,8 @@ call_server(host, port, oid, service_name, gss_flags, auth_flag,
 
     /* Establish context */
     if (client_establish_context(s, service_name, gss_flags, auth_flag,
-                                 v1_format, oid, &context, &ret_flags) < 0) {
+                                 v1_format, oid, username, password,
+                                 &context, &ret_flags) < 0) {
         (void) close(s);
         return -1;
     }
@@ -663,13 +717,15 @@ static OM_uint32 min_stat;
 static gss_OID oid = GSS_C_NULL_OID;
 static int mcount = 1, ccount = 1;
 static int auth_flag, wrap_flag, encrypt_flag, mic_flag, v1_format;
+static char *username = NULL;
+static char *password = NULL;
 
 static void
 worker_bee(void *unused)
 {
     if (call_server(server_host, port, oid, service_name,
                     gss_flags, auth_flag, wrap_flag, encrypt_flag, mic_flag,
-                    v1_format, msg, use_file, mcount) < 0)
+                    v1_format, msg, use_file, mcount, username, password) < 0)
         exit(1);
 
 #ifdef _WIN32
@@ -705,17 +761,33 @@ main(argc, argv)
             if (!argc)
                 usage();
             mechanism = *argv;
-        }
+        } else if (strcmp(*argv, "-user") == 0) {
+            argc--;
+            argv++;
+            if (!argc)
+                usage();
+            username = *argv;
+        } else if (strcmp(*argv, "-pass") == 0) {
+            argc--;
+            argv++;
+            if (!argc)
+                usage();
+            password = *argv;
+        } else if (strcmp(*argv, "-iakerb") == 0) {
+            mechanism = "{ 1 3 6 1 5 2 5 }";
+        } else if (strcmp(*argv, "-spnego") == 0) {
+            mechanism = "{ 1 3 6 1 5 5 2 }";
+        } else if (strcmp(*argv, "-krb5") == 0) {
+            mechanism = "{ 1 3 5 1 5 2 }";
 #ifdef _WIN32
-        else if (strcmp(*argv, "-threads") == 0) {
+        } else if (strcmp(*argv, "-threads") == 0) {
             argc--;
             argv++;
             if (!argc)
                 usage();
             max_threads = atoi(*argv);
-        }
 #endif
-        else if (strcmp(*argv, "-d") == 0) {
+        } else if (strcmp(*argv, "-d") == 0) {
             gss_flags |= GSS_C_DELEG_FLAG;
         } else if (strcmp(*argv, "-seq") == 0) {
             gss_flags |= GSS_C_SEQUENCE_FLAG;
diff --git a/src/appl/gss-sample/gss-server.c b/src/appl/gss-sample/gss-server.c
index 8b59eb276..0ddfaeee8 100644
--- a/src/appl/gss-sample/gss-server.c
+++ b/src/appl/gss-sample/gss-server.c
@@ -58,6 +58,7 @@
 #include <ctype.h>
 
 #include <gssapi/gssapi_generic.h>
+#include <gssapi/gssapi_krb5.h>
 #include "gss-misc.h"
 
 #ifdef HAVE_STRING_H
@@ -75,7 +76,8 @@ usage()
 #endif
     fprintf(stderr, "\n");
     fprintf(stderr,
-            "       [-inetd] [-export] [-logfile file] service_name\n");
+            "       [-inetd] [-export] [-logfile file] [-keytab keytab]\n"
+            "       service_name\n");
     exit(1);
 }
 
@@ -690,6 +692,15 @@ main(int argc, char **argv)
                     exit(1);
                 }
             }
+        } else if (strcmp(*argv, "-keytab") == 0) {
+            argc--;
+            argv++;
+            if (!argc)
+                usage();
+            if (krb5_gss_register_acceptor_identity(*argv)) {
+                fprintf(stderr, "failed to register keytab\n");
+                exit(1);
+            }
         } else
             break;
         argc--;
diff --git a/src/appl/gss-sample/t_gss_sample.py b/src/appl/gss-sample/t_gss_sample.py
index 8a09b2123..09d0803ce 100644
--- a/src/appl/gss-sample/t_gss_sample.py
+++ b/src/appl/gss-sample/t_gss_sample.py
@@ -27,14 +27,54 @@ appdir = os.path.join(buildtop, 'appl', 'gss-sample')
 gss_client = os.path.join(appdir, 'gss-client')
 gss_server = os.path.join(appdir, 'gss-server')
 
-for realm in multipass_realms():
+# Run a gss-server process and a gss-client process, with additional
+# gss-client flags given by options.  Verify that gss-client displayed
+# the expected output for a successful negotiation, and that we
+# obtained credentials for the host service.
+def server_client_test(realm, options):
     portstr = str(realm.server_port())
     server = realm.start_server([gss_server, '-port', portstr, 'host'],
                                 'starting...')
-    output = realm.run_as_client([gss_client, '-port', portstr,
-                                  hostname, 'host', 'testmsg'])
+    output = realm.run_as_client([gss_client, '-port', portstr] + options +
+                                 [hostname, 'host', 'testmsg'])
     if 'Signature verified.' not in output:
         fail('Expected message not seen in gss-client output')
     stop_daemon(server)
+    realm.klist(realm.user_princ, realm.host_princ)
+
+# Make up a filename to hold user's initial credentials.
+def ccache_savefile(realm):
+    return os.path.join(realm.testdir, 'ccache.copy')
+
+# Move user's initial credentials into the save file.
+def ccache_save(realm):
+    os.rename(realm.ccache, ccache_savefile(realm))
+
+# Copy user's initial credentials from the save file into the ccache.
+def ccache_restore(realm):
+    shutil.copyfile(ccache_savefile(realm), realm.ccache)
+
+# Perform a regular (TGS path) test of the server and client.
+def tgs_test(realm, options):
+    ccache_restore(realm)
+    server_client_test(realm, options)
+
+# Perform a test of the server and client with initial credentials
+# obtained through gss_acquire_cred_with_password().
+def as_test(realm, options):
+    os.remove(realm.ccache)
+    server_client_test(realm, options + ['-user', realm.user_princ,
+                                         '-pass', password('user')])
+
+for realm in multipass_realms():
+    ccache_save(realm)
+
+    tgs_test(realm, ['-krb5'])
+    tgs_test(realm, ['-spnego'])
+    tgs_test(realm, ['-iakerb'])
+
+    as_test(realm, ['-krb5'])
+    as_test(realm, ['-spnego'])
+    as_test(realm, ['-iakerb'])
 
 success('GSS sample application')