1 files changed, 109 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/asn1/alg_id.cpp b/comm/third_party/botan/src/lib/asn1/alg_id.cpp
new file mode 100644
index 0000000000..1e82f29955
--- /dev/null
+++ b/comm/third_party/botan/src/lib/asn1/alg_id.cpp
@@ -0,0 +1,109 @@
+/*
+* Algorithm Identifier
+* (C) 1999-2007 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#include <botan/asn1_obj.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<uint8_t>& param) :
+   oid(alg_id),
+   parameters(param)
+   {}
+
+/*
+* Create an AlgorithmIdentifier
+*/
+AlgorithmIdentifier::AlgorithmIdentifier(const std::string& alg_id,
+                                         const std::vector<uint8_t>& param) :
+   AlgorithmIdentifier(OID::from_string(alg_id), param)
+   {}
+
+/*
+* Create an AlgorithmIdentifier
+*/
+AlgorithmIdentifier::AlgorithmIdentifier(const OID& alg_id,
+                                         Encoding_Option option) :
+   oid(alg_id),
+   parameters()
+   {
+   const uint8_t DER_NULL[] = { 0x05, 0x00 };
+
+   if(option == USE_NULL_PARAM)
+      parameters.assign(DER_NULL, DER_NULL + 2);
+   }
+
+/*
+* Create an AlgorithmIdentifier
+*/
+AlgorithmIdentifier::AlgorithmIdentifier(const std::string& alg_id,
+                                         Encoding_Option option) :
+   oid(OID::from_string(alg_id)),
+   parameters()
+   {
+   const uint8_t DER_NULL[] = { 0x05, 0x00 };
+
+   if(option == USE_NULL_PARAM)
+      parameters.assign(DER_NULL, DER_NULL + 2);
+   }
+
+bool AlgorithmIdentifier::parameters_are_null() const
+   {
+   return (parameters.size() == 2 && (parameters[0] == 0x05) && (parameters[1] == 0x00));
+   }
+
+bool operator==(const AlgorithmIdentifier& a1, const AlgorithmIdentifier& a2)
+   {
+   if(a1.get_oid() != a2.get_oid())
+      return false;
+
+   /*
+   * Treat NULL and empty as equivalent
+   */
+   if(a1.parameters_are_null_or_empty() &&
+      a2.parameters_are_null_or_empty())
+      {
+      return true;
+      }
+
+   return (a1.get_parameters() == a2.get_parameters());
+   }
+
+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(get_oid())
+      .raw_bytes(get_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();
+   }
+
+}