openssh-4.4p1-gsskex-20061002.patch

[gssapi-openssh.git] / openssh / gss-serv.c

diff --git a/openssh/gss-serv.c b/openssh/gss-serv.c
index e8191a859cb517a6f2b0ee01d36791c1e5b1b215..841d8bb2f7e1d3b698a22cacb44e15ecbd7b3964 100644 (file)
--- a/openssh/gss-serv.c
+++ b/openssh/gss-serv.c
@@ -1,7 +1,7 @@
 /* $OpenBSD: gss-serv.c,v 1.20 2006/08/03 03:34:42 deraadt Exp $ */
 
 /*
- * Copyright (c) 2001-2003 Simon Wilkinson. All rights reserved.
+ * Copyright (c) 2001-2006 Simon Wilkinson. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -43,8 +43,12 @@
 #include "channels.h"
 #include "session.h"
 #include "misc.h"
+#include "servconf.h"
 
 #include "ssh-gss.h"
+#include "monitor_wrap.h"
+
+extern ServerOptions options;
 
 static ssh_gssapi_client gssapi_client =
     { GSS_C_EMPTY_BUFFER, GSS_C_EMPTY_BUFFER,
@@ -64,6 +68,28 @@ ssh_gssapi_mech* supported_mechs[]= {
        &gssapi_null_mech,
 };
 
+/* Unprivileged */
+char *
+ssh_gssapi_server_mechanisms() {
+       gss_OID_set     supported;
+
+       ssh_gssapi_supported_oids(&supported);
+       return (ssh_gssapi_kex_mechs(supported, &ssh_gssapi_server_check_mech,
+           NULL));
+}
+
+/* Unprivileged */
+int
+ssh_gssapi_server_check_mech(Gssctxt **dum, gss_OID oid, const char *data) {
+       Gssctxt *ctx = NULL;
+       int res;
+ 
+       res = !GSS_ERROR(PRIVSEP(ssh_gssapi_server_ctx(&ctx, oid)));
+       ssh_gssapi_delete_ctx(&ctx);
+
+       return (res);
+}
+
 /* Unprivileged */
 void
 ssh_gssapi_supported_oids(gss_OID_set *oidset)
@@ -89,6 +115,56 @@ ssh_gssapi_supported_oids(gss_OID_set *oidset)
        gss_release_oid_set(&min_status, &supported);
 }
 
+OM_uint32
+ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID oid)
+{
+       if (*ctx)
+               ssh_gssapi_delete_ctx(ctx);
+       ssh_gssapi_build_ctx(ctx);
+       ssh_gssapi_set_oid(*ctx, oid);
+       return (ssh_gssapi_acquire_cred(*ctx));
+}
+
+/* Acquire credentials for a server running on the current host.
+ * Requires that the context structure contains a valid OID
+ */
+
+/* Returns a GSSAPI error code */
+OM_uint32
+ssh_gssapi_acquire_cred(Gssctxt *ctx)
+{
+       OM_uint32 status;
+       char lname[MAXHOSTNAMELEN];
+       gss_OID_set oidset;
+
+       if (options.gss_strict_acceptor) {
+               gss_create_empty_oid_set(&status, &oidset);
+               gss_add_oid_set_member(&status, ctx->oid, &oidset);
+
+               if (gethostname(lname, MAXHOSTNAMELEN)) {
+                       gss_release_oid_set(&status, &oidset);
+                       return (-1);
+               }
+
+               if (GSS_ERROR(ssh_gssapi_import_name(ctx, lname))) {
+                       gss_release_oid_set(&status, &oidset);
+                       return (ctx->major);
+               }
+
+               if ((ctx->major = gss_acquire_cred(&ctx->minor,
+                   ctx->name, 0, oidset, GSS_C_ACCEPT, &ctx->creds, 
+                   NULL, NULL)))
+                       ssh_gssapi_error(ctx);
+
+               gss_release_oid_set(&status, &oidset);
+               return (ctx->major);
+       } else {
+               ctx->name = GSS_C_NO_NAME;
+               ctx->creds = GSS_C_NO_CREDENTIAL;
+       }
+       return GSS_S_COMPLETE;
+}
+
 
 /* Wrapper around accept_sec_context
  * Requires that the context contains:
@@ -303,14 +379,4 @@ ssh_gssapi_userok(char *user)
        return (0);
 }
 
-/* Privileged */
-OM_uint32
-ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
-{
-       ctx->major = gss_verify_mic(&ctx->minor, ctx->context,
-           gssbuf, gssmic, NULL);
-
-       return (ctx->major);
-}
-
 #endif