调用:
cmd5_vc:md5(pbuf,nlength);cmd5_vc:md5(ffile);cmd5_vc:md5(strfilepath);原代码:
md5checksum.h:interface for the md5checksum class.
if!defined(afx_md5checksum_h_2bc7928e_4c15_11d3_b2ee_a4a60e20d2c3_included_)
define afx_md5checksum_h_2bc7928e_4c15_11d3_b2ee_a4a60e20d2c3_included_
if_msc_ver>1000
pragma once
endif/_msc_ver>1000
class cmd5_vc
{
public:
interface functions for the rsa md5 calculation
static cstring md5(byte*pbuf,uint nlength);static cstring md5(cfile&file);static cstring md5(const cstring&strfilepath);protected:
constructor/destructor
cmd5_vc();virtual~cmd5_vc(){};rsa md5 implementation
void transform(byte block[64]);void update(byte*input,ulong ninputlen);cstring final();inline dword rotateleft(dword x,int n);inline void ff(dword&a,dword b,dword c,dword d,dword x,dword s,dword t);inline void gg(dword&a,dword b,dword c,dword d,dword x,dword s,dword t);inline void hh(dword&a,dword b,dword c,dword d,dword x,dword s,dword t);inline void ii(dword&a,dword b,dword c,dword d,dword x,dword s,dword t);utility functions
void dwordtobyte(byte*output,dword*input,uint nlength);void bytetodword(dword*output,byte*input,uint nlength);private:
byte m_lpszbuffer[64];input buffer
ulong m_ncount[2];number of bits,modulo 2^64(l** first)
ulong m_lmd5[4];md5 checksum
};endif/!defined(afx_md5checksum_h_2bc7928e_4c15_11d3_b2ee_a4a60e20d2c3_included_)
magic initialization constants
define md5_init_state_0 0x**
define md5_init_state_1 0xefcdab89
define md5_init_state_2 0x98badcfe
define md5_init_state_3 0x**
constants for transform routine.
define md5_s11 7
define md5_s12 12
define md5_s13 17
define md5_s14 22
define md5_s21 5
define md5_s22 9
define md5_s23 14
define md5_s24 20
define md5_s31 4
define md5_s32 11
define md5_s33 16
define md5_s34 23
define md5_s41 6
define md5_s42 10
define md5_s43 15
define md5_s44 21
transformation constants-round 1
define md5_t01 0xd76aa478/transformation constant 1
define md5_t02 0xe8c7b756/2
define md5_t03 0x242070db/3
define md5_t04 0xc1bdceee/4
define md5_t05 0xf57c0faf/5
define md5_t06 0x4787c62a/6
define md5_t07 0xa**/7
define md5_t08 0xfd4**501/8
define md5_t09 0x**8098d8/9
define md5_t10 0x8b44f7af/10
define md5_t11 0xffff5bb1/11
define md5_t12 0x895cd7be/12
define md5_t13 0x6b901122/13
define md5_t14 0xfd987193/14
define md5_t15 0xa679438e/15
define md5_t16 0x49b40821/16
s-round 2
define md5_t17 0xf61e2562/17
define md5_t18 0xc040b340/18
define md5_t19 0x265e5a51/19
define md5_t20 0xe9b6c7aa/20
define md5_t21 0xd62f105d/21
define md5_t22 0x**/22
define md5_t23 0xd8a1e681/23
define md5_t24 0xe7d3fbc8/24
define md5_t25 0x21e1cde6/25
define md5_t26 0xc33707d6/26
define md5_t27 0xf4d50d87/27
define md5_t28 0x455a14ed/28
define md5_t29 0xa9e3e905/29
define md5_t30 0xfcefa3f8/30
define md5_t31 0x676f02d9/31
define md5_t32 0x8d2a4c8a/32
s-round 3
define md5_t33 0xfffa3942/33
define md5_t34 0x8771f681/34
define md5_t35 0x6d9d6122/35
define md5_t36 0xfde5380c/36
define md5_t37 0xa4beea44/37
define md5_t38 0x4bdecfa9/38
define md5_t39 0xf6bb4b60/39
define md5_t40 0xbebfbc70/40
define md5_t41 0x289b7ec6/41
define md5_t42 0xeaa127fa/42
define md5_t43 0xd4ef3085/43
define md5_t44 0x04881d05/44
define md5_t45 0xd9d4d039/45
define md5_t46 0xe6db99e5/46
define md5_t47 0x1fa27cf8/47
define md5_t48 0xc4ac5665/48
s-round 4
define md5_t49 0xf**/49
define md5_t50 0x432aff97/50
define md5_t51 0xab9423a7/51
define md5_t52 0xfc93a039/52
define md5_t53 0x655b59c3/53
define md5_t54 0x8f0ccc92/54
define md5_t55 0xffeff47d/55
define md5_t56 0x85845dd1/56
define md5_t57 0x6fa87e4f/57
define md5_t58 0xfe2ce6e0/58
define md5_t59 0xa**/59
define md5_t60 0x4e0811a1/60
define md5_t61 0xf7537e82/61
define md5_t62 0xbd3af235/62
define md5_t63 0x2ad7d2bb/63
define md5_t64 0xeb86d391/64
** data(except for first byte)used to final**e the checksum calculation
static unsigned char padding[64]={
0x80,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
};md5checksum.cpp:implementation of the md5checksum class.
include"stdafx.h
include"md5_vc.h
ifdef_debug
undef th**_file
static char th**_file[]=_file_;define new debug_new
endif
cstring cmd5_vc:md5(const cstring&strfilepath)
{
open the file as a binary file in readonly mode,denying write access
cfile file(strfilepath,cfile:moderead|cfile:sharedenywrite|cfile:typebinary);the file has been successfully opened,so now get and return its checksum
return md5(file);}
cstring cmd5_vc:md5(cfile&file)
{
try
{
cmd5_vc md5_vc;md5_vc object
int nlength=0;number of bytes read from the file
const int nbuffersize=1024;checksum the file in blocks of 1024 bytes
byte buffer[nbuffersize];buffer for data read from the file
checksum the file in blocks of 1024 bytes
while((nlength=file.read(buffer,nbuffersize))>0)
{
md5_vc.update(buffer,nlength);}
final**e the checksum and return it
return md5_vc.final();}
report any file exceptions in debug mode only
catch(cfileexception*e)
{
trace0("cmd5_vc:md5:cfileexception caught");throw e;}
}
cstring cmd5_vc:md5(byte*pbuf,uint nlength)
{
entry invariants
afx**validaddress(pbuf,nlength,false);calculate and return the checksum
cmd5_vc md5_vc;md5_vc.update(pbuf,nlength);return md5_vc.final();}
dword cmd5_vc:rotateleft(dword x,int n)
{
check that dword ** 4 bytes long-true in v**ual c++ 6 and 32 bit windows
assert(sizeof(x)=4);rotate and return x
return(x)|(x>>(32-n));}
void cmd5_vc:ff(dword&a,dword b,dword c,dword d,dword x,dword s,dword t)
{
dword f=(b&c)|(~b&d);a+f+x+t;a=rotateleft(a,s);a+b;}
void cmd5_vc:gg(dword&a,dword b,dword c,dword d,dword x,dword s,dword t)
{
dword g=(b&d)|(c&~d);a+g+x+t;a=rotateleft(a,s);a+b;}
void cmd5_vc:hh(dword&a,dword b,dword c,dword d,dword x,dword s,dword t)
{
dword h=(b^c^d);a+h+x+t;a=rotateleft(a,s);a+b;}
void cmd5_vc:ii(dword&a,dword b,dword c,dword d,dword x,dword s,dword t)
{
dword i=(c^(b|~d));a+i+x+t;a=rotateleft(a,s);a+b;}
void cmd5_vc:transform(byte block[64])
{
initial**e local data with current checksum
ulong a=m_lmd5[0];ulong b=m_lmd5[1];ulong c=m_lmd5[2];ulong d=m_lmd5[3];...