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/*
* 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 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;
}
/*
* 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::make_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::make_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();
}
}
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