1 files changed, 71 insertions, 0 deletions
diff --git a/src/asn1_alg.cpp b/src/asn1_alg.cpp
new file mode 100644
index 000000000..4dd5af88e
--- /dev/null
+++ b/src/asn1_alg.cpp
@@ -0,0 +1,71 @@
+/*************************************************
+* Algorithm Identifier Source File               *
+* (C) 1999-2006 The Botan Project                *
+*************************************************/
+
+#include <botan/asn1_obj.h>
+#include <botan/oids.h>
+
+namespace Botan {
+
+/*************************************************
+* Create an AlgorithmIdentifier                  *
+*************************************************/
+AlgorithmIdentifier::AlgorithmIdentifier(const OID& alg_id,
+                                         const MemoryRegion<byte>& param) :
+   oid(alg_id), parameters(param) { }
+
+/*************************************************
+* Create an AlgorithmIdentifier                  *
+*************************************************/
+AlgorithmIdentifier::AlgorithmIdentifier(const std::string& alg_id,
+                                         const MemoryRegion<byte>& param) :
+   oid(OIDS::lookup(alg_id)), parameters(param) { }
+
+/*************************************************
+* DER encode an AlgorithmIdentifier              *
+*************************************************/
+void AlgorithmIdentifier::encode_into(DER_Encoder& der) const
+   {
+   der.start_sequence()
+      .encode(oid)
+      .add_raw_octets(parameters)
+   .end_sequence();
+   }
+
+/*************************************************
+* Compare two AlgorithmIdentifiers               *
+*************************************************/
+bool operator==(const AlgorithmIdentifier& a1, const AlgorithmIdentifier& a2)
+   {
+   if(a1.oid != a2.oid)
+      return false;
+   if(a1.parameters != a2.parameters)
+      return false;
+   return true;
+   }
+
+/*************************************************
+* Compare two AlgorithmIdentifiers               *
+*************************************************/
+bool operator!=(const AlgorithmIdentifier& a1, const AlgorithmIdentifier& a2)
+   {
+   return !(a1 == a2);
+   }
+
+namespace BER {
+
+/*************************************************
+* Decode a BER encoded AlgorithmIdentifier       *
+*************************************************/
+void decode(BER_Decoder& source, AlgorithmIdentifier& alg_id)
+   {
+   BER_Decoder sequence = BER::get_subsequence(source);
+   BER::decode(sequence, alg_id.oid);
+   alg_id.parameters = sequence.get_remaining();
+   sequence.verify_end();
+   }
+
+}
+
+}