插入.exe文件源码

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标 题: VC/VC++ 插入.exe文件源码..

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1. // Base64.cpp: 实现CBase64类.
   
2. //
   
3. #include "stdafx.h"
   
4. #include "Base64.h"
   
5. 
   
6. // 静态成员初始化,7-bit 字母表.
   
7. CString CBase64::m_sBase64Alphabet =
   
8. _T( "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/" );
   
9. 
   
10. //---------------------------------------------------------------------------
    
11. CBase64::CBase64()
    
12. {
    
13. }
    
14. 
    
15. //---------------------------------------------------------------------------
    
16. CBase64::~CBase64()
    
17. {
    
18. }
    
19. 
    
20. //---------------------------------------------------------------------------
    
21. CString CBase64::Encode(LPCTSTR szEncoding,int nSize)
    
22. {
    
23. CString sOutput = _T( "" );
    
24. int nNumBits;
    
25. UINT nDigit;
    
26. int lp = 0;
    
27. 
    
28. if( szEncoding == NULL )
    
29. return sOutput;
    
30. 
    
31. m_szInput = szEncoding;
    
32. m_nInputSize = nSize;
    
33. 
    
34. m_nBitsRemaining = 0;
    
35. nDigit = ReadBits(&nNumBits, lp );
    
36. while( nNumBits > 0 )
    
37. {
    
38. sOutput += m_sBase64Alphabet[ (int)nDigit ];
    
39. nDigit = ReadBits(&nNumBits, lp );
    
40. }
    
41. 
    
42. while( sOutput.GetLength() % 4 != 0 )
    
43. {
    
44. sOutput += '=';
    
45. }
    
46. return sOutput;
    
47. }
    
48. 
    
49. //---------------------------------------------------------------------------
    
50. // 输出缓冲区大小不小于 3/4 输入缓冲区大小. 为了简便,它们的大小取为一致.
    
51. int CBase64::Decode(LPCTSTR szDecoding, LPTSTR szOutput)
    
52. {
    
53. int c, lp =0;
    
54. int nDigit;
    
55. int nDecode[ 256 ];
    
56. 
    
57. ASSERT( szDecoding != NULL );
    
58. ASSERT( szOutput != NULL );
    
59. if( szOutput == NULL )
    
60. return 0;
    
61. 
    
62. if( szDecoding == NULL )
    
63. return 0;
    
64. 
    
65. CString sInput = szDecoding;
    
66. if( sInput.GetLength() == 0 )
    
67. return 0;
    
68. 
    
69. // 建立解码表.
    
70. for( int i = 0; i < 256; i++ )
    
71. nDecode[i] = -2; // 非法数字.
    
72. for( i=0; i < 64; i++ )
    
73. {
    
74. nDecode[ m_sBase64Alphabet[ i ] ] = i;
    
75. nDecode[ m_sBase64Alphabet[ i ] | 0x80 ] = i; // 忽略8th bit.
    
76. nDecode[ '=' ] = -1;
    
77. nDecode[ '=' | 0x80 ] = -1;
    
78. }
    
79. 
    
80. // 清除输出缓冲区.
    
81. memset( szOutput, 0, sInput.GetLength() + 1 );
    
82. 
    
83. // 对输入数据进行解码.
    
84. for( lp = 0, i = 0; lp < sInput.GetLength(); lp++ )
    
85. {
    
86. c = sInput[ lp ];
    
87. nDigit = nDecode[ c & 0x7F ];
    
88. if( nDigit < -1 )
    
89. {
    
90. return 0;
    
91. }
    
92. else if( nDigit >= 0 )
    
93. WriteBits( nDigit & 0x3F, szOutput, i );
    
94. }
    
95. return i;
    
96. }
    
97. 
    
98. //---------------------------------------------------------------------------
    
99. UINT CBase64::ReadBits(int * pBitsRead, int& lp)
    
100. {
     
101. ULONG lScratch;
     
102. while( ( m_nBitsRemaining < 6 ) &&
     
103. ( lp < m_nInputSize ) )
     
104. {
     
105. int c = m_szInput[ lp++ ];
     
106. m_lBitStorage <<= 8;
     
107. m_lBitStorage |= (c & 0xff);
     
108. m_nBitsRemaining += 8;
     
109. }
     
110. 
     
111. if( m_nBitsRemaining < 6 )
     
112. {
     
113. lScratch = m_lBitStorage << ( 6 - m_nBitsRemaining );
     
114. *pBitsRead = m_nBitsRemaining;
     
115. m_nBitsRemaining = 0;
     
116. }
     
117. else
     
118. {
     
119. lScratch = m_lBitStorage >> ( m_nBitsRemaining - 6 );
     
120. *pBitsRead = 6;
     
121. m_nBitsRemaining -= 6;
     
122. }
     
123. 
     
124. return (UINT)lScratch & 0x3F;
     
125. }
     
126. 
     
127. //---------------------------------------------------------------------------
     
128. void CBase64::WriteBits(UINT nBits, LPTSTR szOutput, int& i)
     
129. {
     
130. UINT nScratch;
     
131. 
     
132. m_lBitStorage = (m_lBitStorage << 6) | nBits;
     
133. m_nBitsRemaining += 6;
     
134. while( m_nBitsRemaining > 7 )
     
135. {
     
136. nScratch = m_lBitStorage >> (m_nBitsRemaining - 8);
     
137. szOutput[ i++ ] = nScratch & 0xFF;
     
138. m_nBitsRemaining -= 8;
     
139. }
     
140. }
     

复制代码

sdnyzjzx

感谢分享，收藏备用。

zaas

文不对题啊。。。这代码是Base64的代码

long735

看看！好好分析一下！

cjteam

总感觉不对，呵呵，转帖是否没注意哟

vvking6

恩，看看。