4e88a94675
Batch #5102 by Yommy: 0 byte-identical, 1 confirmed by peer review. - fn_18390 CAES::CAES: logic confirmed by peer review Peer-reviewed-by: youko, Bruwuno Accepted without human review: peers confirmed the logic ("same" ahead by at least 3, with 70% of the votes). Adds to the build: Source/Utility/Cipher/AES.cpp
80 lines
2.2 KiB
C++
80 lines
2.2 KiB
C++
#ifndef RAGNAROK_SOURCE_UTILITY_CIPHER_AES_H
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#define RAGNAROK_SOURCE_UTILITY_CIPHER_AES_H
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#include <cstddef>
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#include <exception>
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class CAES {
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public:
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enum { DEFAULT_BLOCK_SIZE = 16 };
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enum { MAX_BLOCK_SIZE = 32, MAX_ROUNDS = 14, MAX_KC = 8, MAX_BC = 8 };
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CAES(int keyLength, int blockSize);
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virtual ~CAES();
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void EncryptBlock(const char* in, char* result);
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void DecryptBlock(const char* in, char* result);
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void DefEncryptBlock(const char* in, char* result);
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void DefDecryptBlock(const char* in, char* result);
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void Xor(unsigned char* destination, const unsigned char* source);
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// INLINED
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void Decrypt(const char* in, char* result, std::size_t n) {
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if (!this->m_bKeyInit) {
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throw std::exception(sm_szErrorMsg1);
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}
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if (n == 0 || n % this->m_blockSize != 0) {
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throw std::exception(sm_szErrorMsg2);
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}
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for (std::size_t i = 0; i < n / this->m_blockSize; ++i) {
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this->DecryptBlock(in, result);
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in += this->m_blockSize;
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result += this->m_blockSize;
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}
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}
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private:
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static const char* sm_szErrorMsg1;
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static const char* sm_szErrorMsg2;
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static const unsigned char sm_key[16];
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static const unsigned char sm_chain0[16];
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static const signed char sm_S[256];
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static const signed char sm_Si[256];
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static const int sm_T1[256];
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static const int sm_T2[256];
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static const int sm_T3[256];
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static const int sm_T4[256];
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static const int sm_T5[256];
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static const int sm_T6[256];
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static const int sm_T7[256];
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static const int sm_T8[256];
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static const int sm_U1[256];
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static const int sm_U2[256];
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static const int sm_U3[256];
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static const int sm_U4[256];
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static const signed char sm_rcon[30];
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static const int sm_shifts[3][4][2];
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/* 0004 */ bool m_bKeyInit;
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/* 0008 */ int m_Ke[MAX_ROUNDS + 1][MAX_BC];
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/* 01E8 */ int m_Kd[MAX_ROUNDS + 1][MAX_BC];
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/* 03C8 */ int m_keylength;
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/* 03CC */ int m_blockSize;
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/* 03D0 */ int m_iROUNDS;
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/* 03D4 */ char m_chain0[MAX_BLOCK_SIZE];
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/* 03F4 */ char m_chain[MAX_BLOCK_SIZE];
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/* 0414 */ int tk[MAX_KC];
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/* 0434 */ int a[MAX_BC];
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/* 0454 */ int t[MAX_BC];
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};
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void DecryptAES(const char* input, char* output, unsigned int length);
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#if defined(_WIN32) && !defined(_WIN64)
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static_assert(sizeof(CAES) == 0x474);
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#endif
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#endif
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