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/*
* EAC1_1 objects
* (C) 2008 Falko Strenzke
* strenzke@flexsecure.de
*
* Distributed under the terms of the Botan license
*/
#ifndef BOTAN_EAC_OBJ_H__
#define BOTAN_EAC_OBJ_H__
#include <botan/pubkey.h>
#include <botan/x509_key.h>
#include <botan/signed_obj.h>
#include <botan/pubkey_enums.h>
#include <botan/pubkey.h>
#include <botan/parsing.h>
#include <botan/pem.h>
#include <botan/oids.h>
#include <botan/look_pk.h>
#include <botan/ecdsa_sig.h>
#include <string>
namespace Botan {
const std::string eac_cvc_emsa("EMSA1_BSI");
/*
* TR03110 v1.1 EAC CV Certificate
*/
template<typename Derived> // CRTP is used enable the call sequence:
class BOTAN_DLL EAC1_1_obj : public EAC_Signed_Object
{
// data members first:
protected:
ECDSA_Signature m_sig;
// member functions here:
public:
/**
* Return the signature as a concatenation of the encoded parts.
* @result the concatenated signature
*/
SecureVector<byte> get_concat_sig() const;
/**
* Verify the signature of this objects.
* @param pub_key the public key to verify the signature with
* @result true if the verification succeeded
*/
virtual bool check_signature(Public_Key& pub_key) const;
protected:
void init(SharedPtrConverter<DataSource> in);
static SecureVector<byte> make_signature(PK_Signer& signer,
const MemoryRegion<byte>& tbs_bits,
RandomNumberGenerator& rng);
virtual ~EAC1_1_obj<Derived>(){}
};
template<typename Derived> SecureVector<byte> EAC1_1_obj<Derived>::get_concat_sig() const
{
return m_sig.get_concatenation();
}
template<typename Derived> SecureVector<byte>
EAC1_1_obj<Derived>::make_signature(PK_Signer& signer,
const MemoryRegion<byte>& tbs_bits,
RandomNumberGenerator& rng)
{
// this is the signature as a der sequence
SecureVector<byte> seq_sig = signer.sign_message(tbs_bits, rng);
ECDSA_Signature sig(decode_seq(seq_sig));
SecureVector<byte> concat_sig(sig.get_concatenation());
return concat_sig;
}
template<typename Derived> void EAC1_1_obj<Derived>::init(SharedPtrConverter<DataSource> in)
{
try
{
Derived::decode_info(in.get_shared(), tbs_bits, m_sig);
}
catch(Decoding_Error)
{
throw Decoding_Error(PEM_label_pref + " decoding failed");
}
}
template<typename Derived>
bool EAC1_1_obj<Derived>::check_signature(Public_Key& pub_key) 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;
if(!dynamic_cast<PK_Verifying_wo_MR_Key*>(&pub_key))
return false;
std::unique_ptr<ECDSA_Signature_Encoder> enc(new ECDSA_Signature_Encoder(&m_sig));
SecureVector<byte> seq_sig = enc->signature_bits();
SecureVector<byte> to_sign = tbs_data();
PK_Verifying_wo_MR_Key& sig_key = dynamic_cast<PK_Verifying_wo_MR_Key&>(pub_key);
std::unique_ptr<PK_Verifier> verifier(get_pk_verifier(sig_key, padding, format));
return verifier->verify_message(to_sign, seq_sig);
}
catch(...)
{
return false;
}
}
}
#endif
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