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1 // 7zAes.h
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2
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3 #ifndef __CRYPTO_7Z_AES_H
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4 #define __CRYPTO_7Z_AES_H
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5
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6 #include "Common/Buffer.h"
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7 #include "Common/MyCom.h"
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8 #include "Common/MyVector.h"
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9
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10 #include "../ICoder.h"
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11 #include "../IPassword.h"
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12
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13 namespace NCrypto {
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14 namespace NSevenZ {
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15
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16 const int kKeySize = 32;
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17
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18 class CKeyInfo
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19 {
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20 public:
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21 int NumCyclesPower;
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22 UInt32 SaltSize;
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23 Byte Salt[16];
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24 CByteBuffer Password;
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25 Byte Key[kKeySize];
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26
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27 bool IsEqualTo(const CKeyInfo &a) const;
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28 void CalculateDigest();
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29
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30 CKeyInfo() { Init(); }
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31 void Init()
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32 {
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33 NumCyclesPower = 0;
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34 SaltSize = 0;
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35 for (int i = 0; i < sizeof(Salt); i++)
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36 Salt[i] = 0;
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37 }
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38 };
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39
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40 class CKeyInfoCache
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41 {
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42 int Size;
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43 CObjectVector<CKeyInfo> Keys;
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44 public:
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45 CKeyInfoCache(int size): Size(size) {}
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46 bool Find(CKeyInfo &key);
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47 // HRESULT Calculate(CKeyInfo &key);
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48 void Add(CKeyInfo &key);
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49 };
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50
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51 class CBase
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52 {
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53 CKeyInfoCache _cachedKeys;
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54 protected:
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55 CKeyInfo _key;
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56 Byte _iv[16];
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57 UInt32 _ivSize;
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58 void CalculateDigest();
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59 CBase();
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60 };
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61
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62 class CBaseCoder:
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63 public ICompressFilter,
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64 public ICryptoSetPassword,
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65 public CMyUnknownImp,
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66 public CBase
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67 {
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68 protected:
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69 CMyComPtr<ICompressFilter> _aesFilter;
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70
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71 virtual HRESULT CreateFilter() = 0;
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72 #ifndef CRYPTO_AES
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73 HRESULT CreateFilterFromDLL(REFCLSID clsID);
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74 #endif
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75 public:
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76 STDMETHOD(Init)();
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77 STDMETHOD_(UInt32, Filter)(Byte *data, UInt32 size);
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78
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79 STDMETHOD(CryptoSetPassword)(const Byte *data, UInt32 size);
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80 };
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81
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82 #ifndef EXTRACT_ONLY
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83
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84 class CEncoder:
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85 public CBaseCoder,
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86 public ICompressWriteCoderProperties,
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87 // public ICryptoResetSalt,
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88 public ICryptoResetInitVector
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89 {
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90 virtual HRESULT CreateFilter();
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91 public:
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92 MY_UNKNOWN_IMP3(
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93 ICryptoSetPassword,
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94 ICompressWriteCoderProperties,
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95 // ICryptoResetSalt,
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96 ICryptoResetInitVector)
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97 STDMETHOD(WriteCoderProperties)(ISequentialOutStream *outStream);
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98 // STDMETHOD(ResetSalt)();
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99 STDMETHOD(ResetInitVector)();
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100 };
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101 #endif
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102
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103 class CDecoder:
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104 public CBaseCoder,
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105 public ICompressSetDecoderProperties2
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106 {
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107 virtual HRESULT CreateFilter();
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108 public:
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109 MY_UNKNOWN_IMP2(
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110 ICryptoSetPassword,
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111 ICompressSetDecoderProperties2)
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112 STDMETHOD(SetDecoderProperties2)(const Byte *data, UInt32 size);
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113 };
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114
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115 }}
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116
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117 #endif
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