Add gss support from citi @ umich

[nfs-utils.git] / support / gssapi / g_exp_sec_context.c

diff --git a/support/gssapi/g_exp_sec_context.c b/support/gssapi/g_exp_sec_context.c
new file mode 100644 (file)
index 0000000..59d9e80
--- /dev/null
+++ b/support/gssapi/g_exp_sec_context.c
@@ -0,0 +1,108 @@
+/* #ident  "@(#)g_exp_sec_context.c 1.2     96/01/18 SMI" */
+
+/*
+ * Copyright 1996 by Sun Microsystems, Inc.
+ *
+ * Permission to use, copy, modify, distribute, and sell this software
+ * and its documentation for any purpose is hereby granted without fee,
+ * provided that the above copyright notice appears in all copies and
+ * that both that copyright notice and this permission notice appear in
+ * supporting documentation, and that the name of Sun Microsystems not be used
+ * in advertising or publicity pertaining to distribution of the software
+ * without specific, written prior permission. Sun Microsystems makes no
+ * representations about the suitability of this software for any
+ * purpose.  It is provided "as is" without express or implied warranty.
+ *
+ * SUN MICROSYSTEMS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL SUN MICROSYSTEMS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
+ * USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+ *  glue routine for gss_export_sec_context
+ */
+
+#include "mglueP.h"
+#include <stdio.h>
+#include <errno.h>
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#include <string.h>
+
+OM_uint32 KRB5_CALLCONV
+gss_export_sec_context(minor_status,
+                       context_handle,
+                       interprocess_token)
+
+OM_uint32 *            minor_status;
+gss_ctx_id_t *         context_handle;
+gss_buffer_t           interprocess_token;
+
+{
+    OM_uint32          status;
+    size_t             length;
+    gss_union_ctx_id_t ctx;
+    gss_mechanism      mech;
+    gss_buffer_desc    token;
+    char               *buf;
+
+    gss_initialize();
+
+    if (context_handle == NULL || *context_handle == GSS_C_NO_CONTEXT)
+       return GSS_S_NO_CONTEXT;
+
+    /*
+     * select the approprate underlying mechanism routine and
+     * call it.
+     */
+
+    ctx = (gss_union_ctx_id_t) *context_handle;
+    mech = __gss_get_mechanism (ctx->mech_type);
+    if (!mech)
+       return GSS_S_BAD_MECH;
+    if (!mech->gss_export_sec_context)
+       return GSS_S_BAD_BINDINGS;
+
+#ifdef USE_MECH_CONTEXT
+    status = mech->gss_export_sec_context(mech->context, minor_status,
+#else
+    status = mech->gss_export_sec_context(minor_status,
+#endif
+                                         &ctx->internal_ctx_id, &token);
+    if (status != GSS_S_COMPLETE)
+       return (status);
+
+    length = token.length + 4 + ctx->mech_type->length;
+    interprocess_token->length = length;
+    interprocess_token->value = malloc(length);
+    if (interprocess_token->value == 0) {
+       (void) gss_release_buffer(minor_status, &token);
+       *minor_status = ENOMEM;
+       return (GSS_S_FAILURE);
+    }
+    buf = interprocess_token->value;
+    length = ctx->mech_type->length;
+    buf[3] = (unsigned char) (length & 0xFF);
+    length >>= 8;
+    buf[2] = (unsigned char) (length & 0xFF);
+    length >>= 8;
+    buf[1] = (unsigned char) (length & 0xFF);
+    length >>= 8;
+    buf[0] = (unsigned char) (length & 0xFF);
+    memcpy(buf+4, ctx->mech_type->elements, (size_t) ctx->mech_type->length);
+    memcpy(buf+4+ctx->mech_type->length, token.value, token.length);
+
+    (void) gss_release_buffer(minor_status, &token);
+
+    free(ctx->mech_type->elements);
+    free(ctx->mech_type);
+    free(ctx);
+    *context_handle = 0;
+
+    return(GSS_S_COMPLETE);
+}