?? asn.h
字號:
#ifndef CRYPTOPP_ASN_H
#define CRYPTOPP_ASN_H
#include "cryptlib.h"
#include "queue.h"
NAMESPACE_BEGIN(CryptoPP)
// NOTE: these tags and flags are NOT COMPLETE!
enum ASNTag {INTEGER=0x02, BIT_STRING=0x03, SEQUENCE=0x10};
enum ASNIdFlag {CONSTRUCTED = 0x20};
unsigned int DERLengthEncode(unsigned int length, byte *output);
unsigned int DERLengthEncode(unsigned int length, BufferedTransformation &);
#define BERDecodeError() throw BERDecodeErr()
class BERDecodeErr : public Exception {public: BERDecodeErr() : Exception("BER decode error") {}};
bool BERLengthDecode(BufferedTransformation &, unsigned int &);
class BERSequenceDecoder : public BufferedTransformation
{
public:
BERSequenceDecoder(BufferedTransformation &inQueue);
~BERSequenceDecoder();
void Put(byte) {}
void Put(const byte *, unsigned int) {}
unsigned long MaxRetrieveable()
{return inQueue.MaxRetrieveable();}
unsigned int Get(byte &outByte)
{return inQueue.Get(outByte);}
unsigned int Get(byte *outString, unsigned int getMax)
{return inQueue.Get(outString, getMax);}
unsigned int Peek(byte &outByte) const
{return inQueue.Peek(outByte);}
private:
BufferedTransformation &inQueue;
bool definiteLength;
unsigned int length;
};
class DERSequenceEncoder : public ByteQueue
{
public:
DERSequenceEncoder(BufferedTransformation &outQueue);
~DERSequenceEncoder();
private:
BufferedTransformation &outQueue;
};
NAMESPACE_END
#endif
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