1 files changed, 70 insertions, 0 deletions
diff --git a/src/asn1_ext.cpp b/src/asn1_ext.cpp
new file mode 100644
index 000000000..44deeaf8a
--- /dev/null
+++ b/src/asn1_ext.cpp
@@ -0,0 +1,70 @@
+/*************************************************
+* Extension Source File                          *
+* (C) 1999-2006 The Botan Project                *
+*************************************************/
+
+#include <botan/asn1_obj.h>
+#include <botan/oids.h>
+
+namespace Botan {
+
+/*************************************************
+* Create an Extension                            *
+*************************************************/
+Extension::Extension(const OID& extn_oid, const MemoryRegion<byte>& extn_value)
+   {
+   oid = extn_oid;
+   value = extn_value;
+   critical = false;
+   }
+
+/*************************************************
+* Create an Extension                            *
+*************************************************/
+Extension::Extension(const std::string& extn_oid,
+                     const MemoryRegion<byte>& extn_value)
+   {
+   oid = OIDS::lookup(extn_oid);
+   value = extn_value;
+   critical = false;
+   }
+
+/*************************************************
+* DER encode a Extension                         *
+*************************************************/
+void Extension::encode_into(DER_Encoder& der) const
+   {
+   der.start_sequence();
+   der.encode(oid);
+   if(critical)
+      der.encode(true);
+   // der.encode_with_default(critical, false);
+   der.encode(value, OCTET_STRING);
+   der.end_sequence();
+   }
+
+namespace BER {
+
+/*************************************************
+* Decode a BER encoded Extension                 *
+*************************************************/
+void decode(BER_Decoder& ber, Extension& extn)
+   {
+#if 1
+   BER_Decoder extension = BER::get_subsequence(ber);
+   BER::decode(extension, extn.oid);
+   BER::decode_optional(extension, extn.critical, BOOLEAN, UNIVERSAL, false);
+   extension.decode(extn.value, OCTET_STRING);
+   extension.verify_end();
+#else
+   ber.start_subsequence()
+         .decode(extn.oid)
+         .decode_optional(extn.critical, BOOLEAN, UNIVERSAL, false)
+         .decode(extn.value, OCTET_STRING)
+      .end_subsequence();
+#endif
+   }
+
+}
+
+}