2002-10-04 17:31:41 +00:00
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#ifndef CRYPTOPP_ASN_H
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#define CRYPTOPP_ASN_H
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#include "filters.h"
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#include "queue.h"
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2015-07-26 19:51:16 +00:00
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#include "trap.h"
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2002-10-04 17:31:41 +00:00
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#include <vector>
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NAMESPACE_BEGIN(CryptoPP)
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// these tags and flags are not complete
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enum ASNTag
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{
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BOOLEAN = 0x01,
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INTEGER = 0x02,
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BIT_STRING = 0x03,
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OCTET_STRING = 0x04,
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TAG_NULL = 0x05,
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OBJECT_IDENTIFIER = 0x06,
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OBJECT_DESCRIPTOR = 0x07,
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EXTERNAL = 0x08,
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REAL = 0x09,
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ENUMERATED = 0x0a,
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UTF8_STRING = 0x0c,
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SEQUENCE = 0x10,
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SET = 0x11,
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NUMERIC_STRING = 0x12,
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PRINTABLE_STRING = 0x13,
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T61_STRING = 0x14,
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VIDEOTEXT_STRING = 0x15,
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IA5_STRING = 0x16,
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UTC_TIME = 0x17,
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GENERALIZED_TIME = 0x18,
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GRAPHIC_STRING = 0x19,
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VISIBLE_STRING = 0x1a,
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GENERAL_STRING = 0x1b
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};
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enum ASNIdFlag
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{
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UNIVERSAL = 0x00,
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// DATA = 0x01,
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// HEADER = 0x02,
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CONSTRUCTED = 0x20,
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APPLICATION = 0x40,
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CONTEXT_SPECIFIC = 0x80,
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PRIVATE = 0xc0
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};
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inline void BERDecodeError() {throw BERDecodeErr();}
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2003-07-04 00:17:37 +00:00
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class CRYPTOPP_DLL UnknownOID : public BERDecodeErr
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{
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public:
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UnknownOID() : BERDecodeErr("BER decode error: unknown object identifier") {}
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UnknownOID(const char *err) : BERDecodeErr(err) {}
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};
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// unsigned int DERLengthEncode(unsigned int length, byte *output=0);
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2005-07-12 04:23:32 +00:00
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CRYPTOPP_DLL size_t CRYPTOPP_API DERLengthEncode(BufferedTransformation &out, lword length);
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// returns false if indefinite length
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CRYPTOPP_DLL bool CRYPTOPP_API BERLengthDecode(BufferedTransformation &in, size_t &length);
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2005-01-20 04:19:35 +00:00
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CRYPTOPP_DLL void CRYPTOPP_API DEREncodeNull(BufferedTransformation &out);
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CRYPTOPP_DLL void CRYPTOPP_API BERDecodeNull(BufferedTransformation &in);
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2005-07-12 04:23:32 +00:00
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CRYPTOPP_DLL size_t CRYPTOPP_API DEREncodeOctetString(BufferedTransformation &out, const byte *str, size_t strLen);
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CRYPTOPP_DLL size_t CRYPTOPP_API DEREncodeOctetString(BufferedTransformation &out, const SecByteBlock &str);
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CRYPTOPP_DLL size_t CRYPTOPP_API BERDecodeOctetString(BufferedTransformation &in, SecByteBlock &str);
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CRYPTOPP_DLL size_t CRYPTOPP_API BERDecodeOctetString(BufferedTransformation &in, BufferedTransformation &str);
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// for UTF8_STRING, PRINTABLE_STRING, and IA5_STRING
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CRYPTOPP_DLL size_t CRYPTOPP_API DEREncodeTextString(BufferedTransformation &out, const std::string &str, byte asnTag);
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CRYPTOPP_DLL size_t CRYPTOPP_API BERDecodeTextString(BufferedTransformation &in, std::string &str, byte asnTag);
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2005-07-12 04:23:32 +00:00
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CRYPTOPP_DLL size_t CRYPTOPP_API DEREncodeBitString(BufferedTransformation &out, const byte *str, size_t strLen, unsigned int unusedBits=0);
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CRYPTOPP_DLL size_t CRYPTOPP_API BERDecodeBitString(BufferedTransformation &in, SecByteBlock &str, unsigned int &unusedBits);
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2004-06-19 08:26:29 +00:00
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// BER decode from source and DER reencode into dest
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CRYPTOPP_DLL void CRYPTOPP_API DERReencode(BufferedTransformation &source, BufferedTransformation &dest);
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2004-06-19 08:26:29 +00:00
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//! Object Identifier
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class CRYPTOPP_DLL OID
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{
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public:
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OID() {}
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OID(word32 v) : m_values(1, v) {}
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OID(BufferedTransformation &bt) {BERDecode(bt);}
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inline OID & operator+=(word32 rhs) {m_values.push_back(rhs); return *this;}
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void DEREncode(BufferedTransformation &bt) const;
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void BERDecode(BufferedTransformation &bt);
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// throw BERDecodeErr() if decoded value doesn't equal this OID
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void BERDecodeAndCheck(BufferedTransformation &bt) const;
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std::vector<word32> m_values;
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private:
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static void EncodeValue(BufferedTransformation &bt, word32 v);
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static size_t DecodeValue(BufferedTransformation &bt, word32 &v);
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};
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class EncodedObjectFilter : public Filter
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{
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public:
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enum Flag {PUT_OBJECTS=1, PUT_MESSANGE_END_AFTER_EACH_OBJECT=2, PUT_MESSANGE_END_AFTER_ALL_OBJECTS=4, PUT_MESSANGE_SERIES_END_AFTER_ALL_OBJECTS=8};
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EncodedObjectFilter(BufferedTransformation *attachment = NULL, unsigned int nObjects = 1, word32 flags = 0);
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void Put(const byte *inString, size_t length);
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unsigned int GetNumberOfCompletedObjects() const {return m_nCurrentObject;}
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unsigned long GetPositionOfObject(unsigned int i) const {return m_positions[i];}
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private:
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BufferedTransformation & CurrentTarget();
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word32 m_flags;
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unsigned int m_nObjects, m_nCurrentObject, m_level;
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std::vector<unsigned int> m_positions;
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ByteQueue m_queue;
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enum State {IDENTIFIER, LENGTH, BODY, TAIL, ALL_DONE} m_state;
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byte m_id;
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lword m_lengthRemaining;
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};
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//! BER General Decoder
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class CRYPTOPP_DLL BERGeneralDecoder : public Store
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{
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public:
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explicit BERGeneralDecoder(BufferedTransformation &inQueue, byte asnTag);
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explicit BERGeneralDecoder(BERGeneralDecoder &inQueue, byte asnTag);
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~BERGeneralDecoder();
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bool IsDefiniteLength() const {return m_definiteLength;}
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lword RemainingLength() const {assert(m_definiteLength); return m_length;}
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bool EndReached() const;
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byte PeekByte() const;
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void CheckByte(byte b);
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2009-03-10 02:56:19 +00:00
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size_t TransferTo2(BufferedTransformation &target, lword &transferBytes, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true);
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size_t CopyRangeTo2(BufferedTransformation &target, lword &begin, lword end=LWORD_MAX, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true) const;
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// call this to denote end of sequence
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void MessageEnd();
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protected:
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BufferedTransformation &m_inQueue;
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bool m_finished, m_definiteLength;
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lword m_length;
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private:
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void Init(byte asnTag);
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void StoreInitialize(const NameValuePairs ¶meters) {assert(false);}
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lword ReduceLength(lword delta);
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};
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//! DER General Encoder
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class CRYPTOPP_DLL DERGeneralEncoder : public ByteQueue
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{
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public:
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explicit DERGeneralEncoder(BufferedTransformation &outQueue, byte asnTag = SEQUENCE | CONSTRUCTED);
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explicit DERGeneralEncoder(DERGeneralEncoder &outQueue, byte asnTag = SEQUENCE | CONSTRUCTED);
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~DERGeneralEncoder();
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// call this to denote end of sequence
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void MessageEnd();
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private:
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BufferedTransformation &m_outQueue;
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bool m_finished;
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byte m_asnTag;
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};
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//! BER Sequence Decoder
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class CRYPTOPP_DLL BERSequenceDecoder : public BERGeneralDecoder
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{
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public:
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explicit BERSequenceDecoder(BufferedTransformation &inQueue, byte asnTag = SEQUENCE | CONSTRUCTED)
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: BERGeneralDecoder(inQueue, asnTag) {}
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explicit BERSequenceDecoder(BERSequenceDecoder &inQueue, byte asnTag = SEQUENCE | CONSTRUCTED)
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: BERGeneralDecoder(inQueue, asnTag) {}
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};
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//! DER Sequence Encoder
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class CRYPTOPP_DLL DERSequenceEncoder : public DERGeneralEncoder
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{
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public:
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explicit DERSequenceEncoder(BufferedTransformation &outQueue, byte asnTag = SEQUENCE | CONSTRUCTED)
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: DERGeneralEncoder(outQueue, asnTag) {}
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explicit DERSequenceEncoder(DERSequenceEncoder &outQueue, byte asnTag = SEQUENCE | CONSTRUCTED)
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: DERGeneralEncoder(outQueue, asnTag) {}
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};
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//! BER Set Decoder
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class CRYPTOPP_DLL BERSetDecoder : public BERGeneralDecoder
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{
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public:
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explicit BERSetDecoder(BufferedTransformation &inQueue, byte asnTag = SET | CONSTRUCTED)
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: BERGeneralDecoder(inQueue, asnTag) {}
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explicit BERSetDecoder(BERSetDecoder &inQueue, byte asnTag = SET | CONSTRUCTED)
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: BERGeneralDecoder(inQueue, asnTag) {}
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};
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//! DER Set Encoder
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class CRYPTOPP_DLL DERSetEncoder : public DERGeneralEncoder
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{
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public:
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explicit DERSetEncoder(BufferedTransformation &outQueue, byte asnTag = SET | CONSTRUCTED)
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: DERGeneralEncoder(outQueue, asnTag) {}
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explicit DERSetEncoder(DERSetEncoder &outQueue, byte asnTag = SET | CONSTRUCTED)
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: DERGeneralEncoder(outQueue, asnTag) {}
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};
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template <class T>
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class ASNOptional : public member_ptr<T>
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{
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public:
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void BERDecode(BERSequenceDecoder &seqDecoder, byte tag, byte mask = ~CONSTRUCTED)
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{
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byte b;
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if (seqDecoder.Peek(b) && (b & mask) == tag)
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reset(new T(seqDecoder));
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}
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void DEREncode(BufferedTransformation &out)
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{
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if (this->get() != NULL)
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this->get()->DEREncode(out);
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}
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};
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2006-12-18 02:34:33 +00:00
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//! _
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template <class BASE>
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class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE ASN1CryptoMaterial : public ASN1Object, public BASE
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{
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public:
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void Save(BufferedTransformation &bt) const
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{BEREncode(bt);}
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void Load(BufferedTransformation &bt)
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{BERDecode(bt);}
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};
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2003-03-20 01:24:12 +00:00
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//! encodes/decodes subjectPublicKeyInfo
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class CRYPTOPP_DLL X509PublicKey : public ASN1CryptoMaterial<PublicKey>
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{
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public:
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void BERDecode(BufferedTransformation &bt);
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void DEREncode(BufferedTransformation &bt) const;
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virtual OID GetAlgorithmID() const =0;
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virtual bool BERDecodeAlgorithmParameters(BufferedTransformation &bt)
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{BERDecodeNull(bt); return false;}
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virtual bool DEREncodeAlgorithmParameters(BufferedTransformation &bt) const
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{DEREncodeNull(bt); return false;} // see RFC 2459, section 7.3.1
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//! decode subjectPublicKey part of subjectPublicKeyInfo, without the BIT STRING header
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virtual void BERDecodePublicKey(BufferedTransformation &bt, bool parametersPresent, size_t size) =0;
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//! encode subjectPublicKey part of subjectPublicKeyInfo, without the BIT STRING header
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virtual void DEREncodePublicKey(BufferedTransformation &bt) const =0;
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};
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2003-03-20 01:24:12 +00:00
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//! encodes/decodes privateKeyInfo
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2006-12-18 02:34:33 +00:00
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class CRYPTOPP_DLL PKCS8PrivateKey : public ASN1CryptoMaterial<PrivateKey>
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{
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public:
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void BERDecode(BufferedTransformation &bt);
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void DEREncode(BufferedTransformation &bt) const;
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2006-12-18 02:34:33 +00:00
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virtual OID GetAlgorithmID() const =0;
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virtual bool BERDecodeAlgorithmParameters(BufferedTransformation &bt)
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{BERDecodeNull(bt); return false;}
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virtual bool DEREncodeAlgorithmParameters(BufferedTransformation &bt) const
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{DEREncodeNull(bt); return false;} // see RFC 2459, section 7.3.1
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//! decode privateKey part of privateKeyInfo, without the OCTET STRING header
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virtual void BERDecodePrivateKey(BufferedTransformation &bt, bool parametersPresent, size_t size) =0;
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//! encode privateKey part of privateKeyInfo, without the OCTET STRING header
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virtual void DEREncodePrivateKey(BufferedTransformation &bt) const =0;
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2004-06-19 08:26:29 +00:00
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//! decode optional attributes including context-specific tag
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/*! /note default implementation stores attributes to be output in DEREncodeOptionalAttributes */
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virtual void BERDecodeOptionalAttributes(BufferedTransformation &bt);
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//! encode optional attributes including context-specific tag
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virtual void DEREncodeOptionalAttributes(BufferedTransformation &bt) const;
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2006-12-18 02:34:33 +00:00
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protected:
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ByteQueue m_optionalAttributes;
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};
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// ********************************************************
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//! DER Encode Unsigned
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/*! for INTEGER, BOOLEAN, and ENUM */
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template <class T>
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2005-07-12 04:23:32 +00:00
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size_t DEREncodeUnsigned(BufferedTransformation &out, T w, byte asnTag = INTEGER)
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2002-10-04 17:31:41 +00:00
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{
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byte buf[sizeof(w)+1];
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unsigned int bc;
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if (asnTag == BOOLEAN)
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{
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buf[sizeof(w)] = w ? 0xff : 0;
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bc = 1;
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}
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else
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{
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buf[0] = 0;
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for (unsigned int i=0; i<sizeof(w); i++)
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buf[i+1] = byte(w >> (sizeof(w)-1-i)*8);
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bc = sizeof(w);
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while (bc > 1 && buf[sizeof(w)+1-bc] == 0)
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--bc;
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if (buf[sizeof(w)+1-bc] & 0x80)
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++bc;
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}
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out.Put(asnTag);
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2005-07-12 04:23:32 +00:00
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size_t lengthBytes = DERLengthEncode(out, bc);
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2002-10-04 17:31:41 +00:00
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out.Put(buf+sizeof(w)+1-bc, bc);
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return 1+lengthBytes+bc;
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}
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//! BER Decode Unsigned
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// VC60 workaround: std::numeric_limits<T>::max conflicts with MFC max macro
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// CW41 workaround: std::numeric_limits<T>::max causes a template error
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template <class T>
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void BERDecodeUnsigned(BufferedTransformation &in, T &w, byte asnTag = INTEGER,
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T minValue = 0, T maxValue = 0xffffffff)
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{
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byte b;
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if (!in.Get(b) || b != asnTag)
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BERDecodeError();
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2005-07-12 04:23:32 +00:00
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size_t bc;
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2002-10-04 17:31:41 +00:00
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BERLengthDecode(in, bc);
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SecByteBlock buf(bc);
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if (bc != in.Get(buf, bc))
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BERDecodeError();
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const byte *ptr = buf;
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while (bc > sizeof(w) && *ptr == 0)
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{
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bc--;
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ptr++;
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}
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if (bc > sizeof(w))
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BERDecodeError();
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w = 0;
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for (unsigned int i=0; i<bc; i++)
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w = (w << 8) | ptr[i];
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if (w < minValue || w > maxValue)
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BERDecodeError();
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}
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inline bool operator==(const ::CryptoPP::OID &lhs, const ::CryptoPP::OID &rhs)
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{return lhs.m_values == rhs.m_values;}
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inline bool operator!=(const ::CryptoPP::OID &lhs, const ::CryptoPP::OID &rhs)
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{return lhs.m_values != rhs.m_values;}
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inline bool operator<(const ::CryptoPP::OID &lhs, const ::CryptoPP::OID &rhs)
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{return std::lexicographical_compare(lhs.m_values.begin(), lhs.m_values.end(), rhs.m_values.begin(), rhs.m_values.end());}
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inline ::CryptoPP::OID operator+(const ::CryptoPP::OID &lhs, unsigned long rhs)
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{return ::CryptoPP::OID(lhs)+=rhs;}
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NAMESPACE_END
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#endif
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