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/*
* EAC SIGNED Object
* (C) 1999-2010 Jack Lloyd
* 2007 FlexSecure GmbH
*
* Distributed under the terms of the Botan license
*/
#include <botan/signed_obj.h>
#include <botan/pubkey.h>
#include <botan/oids.h>
#include <memory>
namespace Botan {
/*
* Return a BER encoded X.509 object
*/
std::vector<byte> EAC_Signed_Object::BER_encode() const
{
Pipe ber;
ber.start_msg();
encode(ber, RAW_BER);
ber.end_msg();
return unlock(ber.read_all());
}
/*
* Return a PEM encoded X.509 object
*/
std::string EAC_Signed_Object::PEM_encode() const
{
Pipe pem;
pem.start_msg();
encode(pem, PEM);
pem.end_msg();
return pem.read_all_as_string();
}
/*
* Return the algorithm used to sign this object
*/
AlgorithmIdentifier EAC_Signed_Object::signature_algorithm() const
{
return sig_algo;
}
bool EAC_Signed_Object::check_signature(Public_Key& pub_key,
const std::vector<byte>& sig) const
{
try
{
std::vector<std::string> sig_info =
split_on(OIDS::lookup(sig_algo.oid), '/');
if(sig_info.size() != 2 || sig_info[0] != pub_key.algo_name())
{
return false;
}
std::string padding = sig_info[1];
Signature_Format format =
(pub_key.message_parts() >= 2) ? DER_SEQUENCE : IEEE_1363;
std::vector<byte> to_sign = tbs_data();
PK_Verifier verifier(pub_key, padding, format);
return verifier.verify_message(to_sign, sig);
}
catch(...)
{
return false;
}
}
/*
* Try to decode the actual information
*/
void EAC_Signed_Object::do_decode()
{
try {
force_decode();
}
catch(Decoding_Error& e)
{
const std::string what = e.what();
throw Decoding_Error(PEM_label_pref + " decoding failed (" + what + ")");
}
catch(Invalid_Argument& e)
{
const std::string what = e.what();
throw Decoding_Error(PEM_label_pref + " decoding failed (" + what + ")");
}
}
}
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