new files

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@1579 ec53bebd-3082-4978-b11e-865c3cabbd6b

lib/gssapi/decapsulate.c

@@ -0,0 +1,36 @@
+#include "gssapi_locl.h"
+
+RCSID("$Id$");
+
+/*
+ * Remove the GSS-API wrapping from `in_token' giving `out_data.
+ * Does not copy data, so just free `in_token'.
+ */
+
+OM_uint32
+gssapi_krb5_decapsulate(
+			gss_buffer_t input_token_buffer,
+			krb5_data *out_data,
+			u_char *type
+)
+{
+  u_char *p;
+  size_t len;
+
+  p = input_token_buffer->value;
+  len = GSS_KRB5_MECHANISM->length + 6;
+  if (
+      input_token_buffer->length < len
+      || memcmp (p, "\x60\x07\x06\x05", 4) != 0
+      || memcmp (p + 4, GSS_KRB5_MECHANISM->elements,
+		 GSS_KRB5_MECHANISM->length) != 0)
+    return GSS_S_BAD_MECH;
+  if (memcmp (p + 4 + GSS_KRB5_MECHANISM->length,
+	      type, 2) != 0)
+    return GSS_S_DEFECTIVE_TOKEN;
+
+  out_data->length = input_token_buffer->length - len;
+  out_data->data   = (u_char *)input_token_buffer->value  + len;
+
+  return GSS_S_COMPLETE;
+}