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15.05

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This commit is contained in:
Igor Pavlov
2015-06-15 00:00:00 +00:00
committed by Kornel Lesiński
parent 0713a3ab80
commit 54490d51d5
591 changed files with 34932 additions and 16390 deletions
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61
CPP/7zip/Crypto/WzAes.h
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@@ -1,7 +1,7 @@
// Crypto/WzAes.h
/*
This code implements Brian Gladman's scheme
specified in password Based File Encryption Utility:
specified in "A Password Based File Encryption Utility":
- AES encryption (128,192,256-bit) in Counter (CTR) mode.
- HMAC-SHA1 authentication for encrypted data (10 bytes)
- Keys are derived by PPKDF2(RFC2898)-HMAC-SHA1 from ASCII password and
@@ -25,13 +25,24 @@ specified in password Based File Encryption Utility:
namespace NCrypto {
namespace NWzAes {
const unsigned kSaltSizeMax = 16;
const unsigned kMacSize = 10;
/* ICompressFilter::Init() does nothing for this filter.
Call to init:
Encoder:
CryptoSetPassword();
WriteHeader();
Decoder:
[CryptoSetPassword();]
ReadHeader();
[CryptoSetPassword();] Init_and_CheckPassword();
[CryptoSetPassword();] Init_and_CheckPassword();
*/
const UInt32 kPasswordSizeMax = 99; // 128;
// Password Verification Code Size
const unsigned kPwdVerifCodeSize = 2;
const unsigned kSaltSizeMax = 16;
const unsigned kPwdVerifSize = 2;
const unsigned kMacSize = 10;
enum EKeySizeMode
{
@@ -40,20 +51,19 @@ enum EKeySizeMode
kKeySizeMode_AES256 = 3
};
class CKeyInfo
struct CKeyInfo
{
public:
EKeySizeMode KeySizeMode;
Byte Salt[kSaltSizeMax];
Byte PwdVerifComputed[kPwdVerifCodeSize];
Byte PwdVerifComputed[kPwdVerifSize];
CByteBuffer Password;
UInt32 GetKeySize() const { return (8 * (KeySizeMode & 3) + 8); }
UInt32 GetSaltSize() const { return (4 * (KeySizeMode & 3) + 4); }
unsigned GetKeySize() const { return (8 * KeySizeMode + 8); }
unsigned GetSaltSize() const { return (4 * KeySizeMode + 4); }
unsigned GetNumSaltWords() const { return (KeySizeMode + 1); }
CKeyInfo() { Init(); }
void Init() { KeySizeMode = kKeySizeMode_AES256; }
CKeyInfo(): KeySizeMode(kKeySizeMode_AES256) {}
};
struct CAesCtr2
@@ -75,16 +85,19 @@ class CBaseCoder:
protected:
CKeyInfo _key;
NSha1::CHmac _hmac;
Byte _pwdVerifFromArchive[kPwdVerifCodeSize];
CAesCtr2 _aes;
void Init2();
public:
STDMETHOD(Init)();
STDMETHOD_(UInt32, Filter)(Byte *data, UInt32 size) = 0;
MY_UNKNOWN_IMP1(ICryptoSetPassword)
STDMETHOD(CryptoSetPassword)(const Byte *data, UInt32 size);
UInt32 GetHeaderSize() const { return _key.GetSaltSize() + kPwdVerifCodeSize; }
STDMETHOD(Init)();
unsigned GetHeaderSize() const { return _key.GetSaltSize() + kPwdVerifSize; }
unsigned GetAddPackSize() const { return GetHeaderSize() + kMacSize; }
bool SetKeyMode(unsigned mode)
{
if (mode < kKeySizeMode_AES128 || mode > kKeySizeMode_AES256)
@@ -98,24 +111,22 @@ class CEncoder:
public CBaseCoder
{
public:
MY_UNKNOWN_IMP1(ICryptoSetPassword)
STDMETHOD_(UInt32, Filter)(Byte *data, UInt32 size);
HRESULT WriteHeader(ISequentialOutStream *outStream);
HRESULT WriteFooter(ISequentialOutStream *outStream);
};
class CDecoder:
public CBaseCoder,
public ICompressSetDecoderProperties2
public CBaseCoder
// public ICompressSetDecoderProperties2
{
Byte _pwdVerifFromArchive[kPwdVerifSize];
public:
MY_UNKNOWN_IMP2(
ICryptoSetPassword,
ICompressSetDecoderProperties2)
// ICompressSetDecoderProperties2
// STDMETHOD(SetDecoderProperties2)(const Byte *data, UInt32 size);
STDMETHOD_(UInt32, Filter)(Byte *data, UInt32 size);
STDMETHOD(SetDecoderProperties2)(const Byte *data, UInt32 size);
HRESULT ReadHeader(ISequentialInStream *inStream);
bool CheckPasswordVerifyCode();
bool Init_and_CheckPassword();
HRESULT CheckMac(ISequentialInStream *inStream, bool &isOK);
};