1 files changed, 105 insertions, 0 deletions
diff --git a/src/lib/asn1/alg_id.cpp b/src/lib/asn1/alg_id.cpp
new file mode 100644
index 000000000..bb8dac80a
--- /dev/null
+++ b/src/lib/asn1/alg_id.cpp
@@ -0,0 +1,105 @@
+/*
+* Algorithm Identifier
+* (C) 1999-2007 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#include <botan/alg_id.h>
+#include <botan/der_enc.h>
+#include <botan/ber_dec.h>
+#include <botan/oids.h>
+
+namespace Botan {
+
+/*
+* Create an AlgorithmIdentifier
+*/
+AlgorithmIdentifier::AlgorithmIdentifier(const OID& alg_id,
+                                         const std::vector<byte>& param)
+   {
+   oid = alg_id;
+   parameters = param;
+   }
+
+/*
+* Create an AlgorithmIdentifier
+*/
+AlgorithmIdentifier::AlgorithmIdentifier(const std::string& alg_id,
+                                         const std::vector<byte>& param)
+   {
+   oid = OIDS::lookup(alg_id);
+   parameters = param;
+   }
+
+/*
+* Create an AlgorithmIdentifier
+*/
+AlgorithmIdentifier::AlgorithmIdentifier(const OID& alg_id,
+                                         Encoding_Option option)
+   {
+   const byte DER_NULL[] = { 0x05, 0x00 };
+
+   oid = alg_id;
+
+   if(option == USE_NULL_PARAM)
+      parameters += std::pair<const byte*, size_t>(DER_NULL, sizeof(DER_NULL));
+   }
+
+/*
+* Create an AlgorithmIdentifier
+*/
+AlgorithmIdentifier::AlgorithmIdentifier(const std::string& alg_id,
+                                         Encoding_Option option)
+   {
+   const byte DER_NULL[] = { 0x05, 0x00 };
+
+   oid = OIDS::lookup(alg_id);
+
+   if(option == USE_NULL_PARAM)
+      parameters += std::pair<const byte*, size_t>(DER_NULL, sizeof(DER_NULL));
+   }
+
+/*
+* 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);
+   }
+
+/*
+* DER encode an AlgorithmIdentifier
+*/
+void AlgorithmIdentifier::encode_into(DER_Encoder& codec) const
+   {
+   codec.start_cons(SEQUENCE)
+      .encode(oid)
+      .raw_bytes(parameters)
+   .end_cons();
+   }
+
+/*
+* Decode a BER encoded AlgorithmIdentifier
+*/
+void AlgorithmIdentifier::decode_from(BER_Decoder& codec)
+   {
+   codec.start_cons(SEQUENCE)
+      .decode(oid)
+      .raw_bytes(parameters)
+   .end_cons();
+   }
+
+}