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56 lines
1.9 KiB
C++
56 lines
1.9 KiB
C++
// Md5.h: interface for the CMd5 class.
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//
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//////////////////////////////////////////////////////////////////////
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#if !defined(AFX_MD5_H__02391EF3_6296_4823_BC8C_D8B3DFE719B2__INCLUDED_)
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#define AFX_MD5_H__02391EF3_6296_4823_BC8C_D8B3DFE719B2__INCLUDED_
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#if _MSC_VER > 1000
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#pragma once
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#endif // _MSC_VER > 1000
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#define UINT4 unsigned long
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#define MD5_BLOCK_SIZE 64 // Operate on the input in 64 byte chunks.
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#define MD5_COUNT_SIZE 2 // The bit cnt of the input is this big.
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#define MD5_XFORM_SIZE 16 // The xform buffer is this long.
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enum MD5_PadMode{normal, to_end, finish};
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class CMD5
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{
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private:
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// Operate on the input file one block at a time.
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unsigned char manip_block[MD5_BLOCK_SIZE];
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// Index to next empty manip_block position.
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// If block_idx == MD5_BLOCK_SIZE, manip_block is full.
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int block_idx;
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// The bit count of the input file, mod 2^64, lsb first.
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UINT4 count[MD5_COUNT_SIZE];
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// The A,B,C,D, components of the digest in the making.
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UINT4 a,b,c,d;
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// The manip_block is converted into this array of unsigned integers
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// to me used by the transformation routine.
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UINT4 xform_buf[MD5_XFORM_SIZE];
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public:
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CMD5();
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CMD5(CFile& InputFile);
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void SetContent(CString csContent);
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void GetDigest(unsigned char*); // Pointer to an array 16 bytes long. Large enough to hold 128 bits of digest, ls byte first.
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CString ConvertToAscii(unsigned char* lpszBuff);
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// Helper functions
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private:
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void MD5_Decode(); // Convert a manip_block of data from the input to the xform_buf to be transformed.
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void MD5_IncCount(int); // Keep track of the bit length of the input, as successive blocks are read.
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void MD5_Pad(MD5_PadMode); // Perform padding functions.
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void MD5_StoreCnt(); // Store the bit length of the input into the current manip_block.
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void MD5_Xform(); // Do the transformation.
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};
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#endif // !defined(AFX_MD5_H__02391EF3_6296_4823_BC8C_D8B3DFE719B2__INCLUDED_)
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