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77 lines
2.7 KiB
C++
77 lines
2.7 KiB
C++
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#include "RC4Crypt.h"
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#include <boost/scoped_array.hpp>
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namespace CRYPT
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{
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RC4Crypt::RC4Crypt(CRYPTO::RC4EncryptionHeaderPtr & header, std::wstring password)
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{
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m_VerifyPassword = false;
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if (!header) return;
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CopyDWORDs2Bytes(header->Salt.b1, header->Salt.b2, header->Salt.b3, header->Salt.b4, pnSalt);
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CopyDWORDs2Bytes(header->EncryptedVerifier.b1 , header->EncryptedVerifier.b2, header->EncryptedVerifier.b3, header->EncryptedVerifier.b4, pnVerifier);
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CopyDWORDs2Bytes(header->EncryptedVerifierHash.b1, header->EncryptedVerifierHash.b2, header->EncryptedVerifierHash.b3, header->EncryptedVerifierHash.b4, pnVerifierHash);
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mxDecoder.reset(new BiffDecoder_RCF(pnSalt, pnVerifier, pnVerifierHash));
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m_VerifyPassword = mxDecoder->verifyPassword(password);
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}
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void RC4Crypt::Encrypt(char* data, const size_t size)
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{
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}
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bool RC4Crypt::IsVerify()
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{
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return m_VerifyPassword;
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}
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void RC4Crypt::CopyDWORDs2Bytes(const unsigned int b1, const unsigned int b2, const unsigned int b3, const unsigned int b4, unsigned char* byte_array)
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{
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byte_array[0] = static_cast<unsigned char>((b1 & 0x000000ff) >> 0);
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byte_array[1] = static_cast<unsigned char>((b1 & 0x0000ff00) >> 8);
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byte_array[2] = static_cast<unsigned char>((b1 & 0x00ff0000) >> 16);
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byte_array[3] = static_cast<unsigned char>((b1 & 0xff000000) >> 24);
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byte_array[4] = static_cast<unsigned char>((b2 & 0x000000ff) >> 0);
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byte_array[5] = static_cast<unsigned char>((b2 & 0x0000ff00) >> 8);
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byte_array[6] = static_cast<unsigned char>((b2 & 0x00ff0000) >> 16);
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byte_array[7] = static_cast<unsigned char>((b2 & 0xff000000) >> 24);
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byte_array[8] = static_cast<unsigned char>((b3 & 0x000000ff) >> 0);
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byte_array[9] = static_cast<unsigned char>((b3 & 0x0000ff00) >> 8);
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byte_array[10] = static_cast<unsigned char>((b3 & 0x00ff0000) >> 16);
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byte_array[11] = static_cast<unsigned char>((b3 & 0xff000000) >> 24);
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byte_array[12] = static_cast<unsigned char>((b4 & 0x000000ff) >> 0);
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byte_array[13] = static_cast<unsigned char>((b4 & 0x0000ff00) >> 8);
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byte_array[14] = static_cast<unsigned char>((b4 & 0x00ff0000) >> 16);
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byte_array[15] = static_cast<unsigned char>((b4 & 0xff000000) >> 24);
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}
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void RC4Crypt::Decrypt(char* data, const size_t size, const unsigned long stream_pos)
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{
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static unsigned char quick_buf[256];
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if(size <= 256)
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{
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mxDecoder->decode( quick_buf, reinterpret_cast<unsigned char*>(data), stream_pos, size );
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memcpy(data, quick_buf, size);
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}
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else
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{
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boost::scoped_array<unsigned char> out_data(new unsigned char[size]);
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mxDecoder->decode( out_data.get(), reinterpret_cast<unsigned char*>(data), stream_pos, size );
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memcpy(data, out_data.get(), size);
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}
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}
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};
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