Add gss support from citi @ umich

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

diff --git a/support/gssapi/g_imp_sec_context.c b/support/gssapi/g_imp_sec_context.c
new file mode 100644 (file)
index 0000000..faa58ed
--- /dev/null
+++ b/support/gssapi/g_imp_sec_context.c
@@ -0,0 +1,128 @@
+/* #ident  "@(#)g_imp_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 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_import_sec_context(minor_status,
+                       interprocess_token,
+                       context_handle)
+
+OM_uint32 *            minor_status;
+gss_buffer_t           interprocess_token;
+gss_ctx_id_t *         context_handle;
+
+{
+    size_t             length;
+    OM_uint32          status;
+    char               *p;
+    gss_union_ctx_id_t ctx;
+    gss_buffer_desc    token;
+    gss_mechanism      mech;
+
+    gss_initialize();
+
+    *minor_status = 0;
+
+    if (interprocess_token->length == 0 || interprocess_token->value == 0)
+       return (GSS_S_DEFECTIVE_TOKEN);
+
+    status = GSS_S_FAILURE;
+
+    ctx = (gss_union_ctx_id_t) malloc(sizeof(gss_union_ctx_id_desc));
+    if (!ctx) {
+       *minor_status = ENOMEM;
+       goto error_out;
+    }
+    ctx->mech_type = (gss_OID) malloc(sizeof(gss_OID_desc));
+    if (!ctx->mech_type) {
+       *minor_status = ENOMEM;
+       goto error_out;
+    }
+    p = interprocess_token->value;
+    length = *p++;
+    length = (length << 8) + *p++;
+    length = (length << 8) + *p++;
+    length = (length << 8) + *p++;
+
+    ctx->mech_type->length = length;
+    ctx->mech_type->elements = malloc(length);
+    if (!ctx->mech_type->elements) {
+       *minor_status = ENOMEM;
+       goto error_out;
+    }
+    memcpy(ctx->mech_type->elements, p, length);
+    p += length;
+
+    token.length = interprocess_token->length - 4 - length;
+    token.value = p;
+
+    /*
+     * select the approprate underlying mechanism routine and
+     * call it.
+     */
+
+    mech = __gss_get_mechanism (ctx->mech_type);
+    if (!mech) {
+       status = GSS_S_BAD_MECH;
+       goto error_out;
+    }
+    if (!mech->gss_import_sec_context) {
+       status = GSS_S_BAD_BINDINGS;
+       goto error_out;
+    }
+
+#ifdef USE_MECH_CONTEXT
+    status = mech->gss_import_sec_context(mech->context, minor_status,
+#else
+    status = mech->gss_import_sec_context(minor_status,
+#endif
+                                         &token, &ctx->internal_ctx_id);
+
+    if (status == GSS_S_COMPLETE) {
+       *context_handle = ctx;
+       return (GSS_S_COMPLETE);
+    }
+
+error_out:
+    if (ctx) {
+       if (ctx->mech_type) {
+           if (ctx->mech_type->elements)
+               free(ctx->mech_type->elements);
+           free(ctx->mech_type);
+       }
+       free(ctx);
+    }
+    return status;
+}