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74 lines
1.4 KiB
C++
Executable File
74 lines
1.4 KiB
C++
Executable File
// Crypto/ZipStrong.h
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#ifndef ZIP7_INC_CRYPTO_ZIP_STRONG_H
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#define ZIP7_INC_CRYPTO_ZIP_STRONG_H
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#include "../../Common/MyBuffer2.h"
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#include "../IPassword.h"
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#include "MyAes.h"
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namespace NCrypto {
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namespace NZipStrong {
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/* ICompressFilter::Init() does nothing for this filter.
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Call to init:
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Decoder:
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[CryptoSetPassword();]
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ReadHeader();
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[CryptoSetPassword();] Init_and_CheckPassword();
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[CryptoSetPassword();] Init_and_CheckPassword();
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*/
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struct CKeyInfo
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{
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Byte MasterKey[32];
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UInt32 KeySize;
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void SetPassword(const Byte *data, UInt32 size);
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void Wipe()
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{
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Z7_memset_0_ARRAY(MasterKey);
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}
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};
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const unsigned kAesPadAllign = AES_BLOCK_SIZE;
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Z7_CLASS_IMP_COM_2(
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CDecoder
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, ICompressFilter
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, ICryptoSetPassword
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)
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CAesCbcDecoder *_cbcDecoder;
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CMyComPtr<ICompressFilter> _aesFilter;
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CKeyInfo _key;
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CAlignedBuffer _bufAligned;
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UInt32 _ivSize;
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Byte _iv[16];
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UInt32 _remSize;
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public:
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HRESULT ReadHeader(ISequentialInStream *inStream, UInt32 crc, UInt64 unpackSize);
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HRESULT Init_and_CheckPassword(bool &passwOK);
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UInt32 GetPadSize(UInt32 packSize32) const
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{
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// Padding is to align to blockSize of cipher.
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// Change it, if is not AES
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return kAesPadAllign - (packSize32 & (kAesPadAllign - 1));
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}
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CDecoder();
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~CDecoder() { Wipe(); }
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void Wipe()
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{
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Z7_memset_0_ARRAY(_iv);
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_key.Wipe();
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}
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};
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}}
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#endif
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