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/*
* DER Encoder
* (C) 1999-2007 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_DER_ENCODER_H__
#define BOTAN_DER_ENCODER_H__
#include <botan/asn1_obj.h>
#include <vector>
namespace Botan {
class BigInt;
class ASN1_Object;
/**
* General DER Encoding Object
*/
class BOTAN_DLL DER_Encoder
{
public:
secure_vector<byte> get_contents();
std::vector<byte> get_contents_unlocked()
{ return unlock(get_contents()); }
DER_Encoder& start_cons(ASN1_Tag type_tag,
ASN1_Tag class_tag = UNIVERSAL);
DER_Encoder& end_cons();
DER_Encoder& start_explicit(u16bit type_tag);
DER_Encoder& end_explicit();
DER_Encoder& raw_bytes(const byte val[], size_t len);
DER_Encoder& raw_bytes(const secure_vector<byte>& val);
DER_Encoder& raw_bytes(const std::vector<byte>& val);
DER_Encoder& encode_null();
DER_Encoder& encode(bool b);
DER_Encoder& encode(size_t s);
DER_Encoder& encode(const BigInt& n);
DER_Encoder& encode(const secure_vector<byte>& v, ASN1_Tag real_type);
DER_Encoder& encode(const std::vector<byte>& v, ASN1_Tag real_type);
DER_Encoder& encode(const byte val[], size_t len, ASN1_Tag real_type);
DER_Encoder& encode(bool b,
ASN1_Tag type_tag,
ASN1_Tag class_tag = CONTEXT_SPECIFIC);
DER_Encoder& encode(size_t s,
ASN1_Tag type_tag,
ASN1_Tag class_tag = CONTEXT_SPECIFIC);
DER_Encoder& encode(const BigInt& n,
ASN1_Tag type_tag,
ASN1_Tag class_tag = CONTEXT_SPECIFIC);
DER_Encoder& encode(const std::vector<byte>& v,
ASN1_Tag real_type,
ASN1_Tag type_tag,
ASN1_Tag class_tag = CONTEXT_SPECIFIC);
DER_Encoder& encode(const secure_vector<byte>& v,
ASN1_Tag real_type,
ASN1_Tag type_tag,
ASN1_Tag class_tag = CONTEXT_SPECIFIC);
DER_Encoder& encode(const byte v[], size_t len,
ASN1_Tag real_type,
ASN1_Tag type_tag,
ASN1_Tag class_tag = CONTEXT_SPECIFIC);
template<typename T>
DER_Encoder& encode_optional(const T& value, const T& default_value)
{
if(value != default_value)
encode(value);
return (*this);
}
template<typename T>
DER_Encoder& encode_list(const std::vector<T>& values)
{
for(size_t i = 0; i != values.size(); ++i)
encode(values[i]);
return (*this);
}
DER_Encoder& encode(const ASN1_Object& obj);
DER_Encoder& encode_if(bool pred, DER_Encoder& enc);
DER_Encoder& encode_if(bool pred, const ASN1_Object& obj);
DER_Encoder& add_object(ASN1_Tag type_tag, ASN1_Tag class_tag,
const byte rep[], size_t length);
DER_Encoder& add_object(ASN1_Tag type_tag, ASN1_Tag class_tag,
const std::vector<byte>& rep)
{
return add_object(type_tag, class_tag, &rep[0], rep.size());
}
DER_Encoder& add_object(ASN1_Tag type_tag, ASN1_Tag class_tag,
const secure_vector<byte>& rep)
{
return add_object(type_tag, class_tag, &rep[0], rep.size());
}
DER_Encoder& add_object(ASN1_Tag type_tag, ASN1_Tag class_tag,
const std::string& str);
DER_Encoder& add_object(ASN1_Tag type_tag, ASN1_Tag class_tag,
byte val);
private:
class DER_Sequence
{
public:
ASN1_Tag tag_of() const;
secure_vector<byte> get_contents();
void add_bytes(const byte[], size_t);
DER_Sequence(ASN1_Tag, ASN1_Tag);
private:
ASN1_Tag type_tag, class_tag;
secure_vector<byte> contents;
std::vector< secure_vector<byte> > set_contents;
};
secure_vector<byte> contents;
std::vector<DER_Sequence> subsequences;
};
}
#endif
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