Simone
d074cc7c07
Plugin: ns7zip v2.0.0 Architectures: x86-ansi, x86-unicode, amd64-unicode License: LGPL-2.1-or-later
98 lines
1.8 KiB
C++
98 lines
1.8 KiB
C++
// Crypto/Rar5Aes.h
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#ifndef ZIP7_INC_CRYPTO_RAR5_AES_H
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#define ZIP7_INC_CRYPTO_RAR5_AES_H
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#include "../../../C/Sha256.h"
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#include "../../Common/MyBuffer.h"
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#include "MyAes.h"
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namespace NCrypto {
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namespace NRar5 {
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const unsigned kSaltSize = 16;
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const unsigned kPswCheckSize32 = 2;
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const unsigned kAesKeySize = 32;
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namespace NCryptoFlags
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{
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const unsigned kPswCheck = 1 << 0;
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const unsigned kUseMAC = 1 << 1;
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}
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struct CKeyBase
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{
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protected:
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UInt32 _key32[kAesKeySize / 4];
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UInt32 _hashKey32[SHA256_NUM_DIGEST_WORDS];
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UInt32 _check_Calced32[kPswCheckSize32];
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void Wipe()
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{
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memset(this, 0, sizeof(*this));
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}
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void CopyCalcedKeysFrom(const CKeyBase &k)
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{
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*this = k;
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}
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};
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struct CKey: public CKeyBase
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{
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CByteBuffer _password;
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bool _needCalc;
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unsigned _numIterationsLog;
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Byte _salt[kSaltSize];
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bool IsKeyEqualTo(const CKey &key)
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{
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return _numIterationsLog == key._numIterationsLog
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&& memcmp(_salt, key._salt, sizeof(_salt)) == 0
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&& _password == key._password;
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}
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CKey();
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~CKey();
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void Wipe();
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#ifdef Z7_CPP_IS_SUPPORTED_default
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// CKey(const CKey &) = default;
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CKey& operator =(const CKey &) = default;
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#endif
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};
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class CDecoder Z7_final:
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public CAesCbcDecoder,
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public CKey
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{
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UInt32 _check32[kPswCheckSize32];
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bool _canCheck;
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UInt64 Flags;
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bool IsThereCheck() const { return (Flags & NCryptoFlags::kPswCheck) != 0; }
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public:
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Byte _iv[AES_BLOCK_SIZE];
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CDecoder();
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Z7_COM7F_IMP(Init())
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void SetPassword(const Byte *data, size_t size);
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HRESULT SetDecoderProps(const Byte *data, unsigned size, bool includeIV, bool isService);
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bool CalcKey_and_CheckPassword();
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bool UseMAC() const { return (Flags & NCryptoFlags::kUseMAC) != 0; }
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UInt32 Hmac_Convert_Crc32(UInt32 crc) const;
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void Hmac_Convert_32Bytes(Byte *data) const;
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};
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}}
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#endif
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