MD5算法文档格式.docx
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- 上传时间:2023-01-25
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MD5算法文档格式.docx
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(~z)))
#defineH(x,y,z)((x)^(y)^(z))
#defineI(x,y,z)((y)^((x)|(~z)))
ROTATE_LEFTrotatesxleftnbits.
#defineROTATE_LEFT(x,n)(((x)<
<
(n))|((x)>
>
(32-(n))))
FF,GG,HH,andIItransformationsforrounds1,2,3,and4.
Rotationisseparatefromadditiontopreventrecomputation.
#defineFF(a,b,c,d,x,s,ac){(a)+=F((b),(c),(d))+(x)+(UINT4)(ac);
(a)=ROTATE_LEFT((a),(s));
(a)+=(b);
}
#defineGG(a,b,c,d,x,s,ac){(a)+=G((b),(c),(d))+(x)+(UINT4)(ac);
(a)=ROTATE_LEFT((a),(s));
#defineHH(a,b,c,d,x,s,ac){(a)+=H((b),(c),(d))+(x)+(UINT4)(ac);
#defineII(a,b,c,d,x,s,ac){(a)+=I((b),(c),(d))+(x)+(UINT4)(ac);
#defineTEST_BLOCK_LEN1000
#defineTEST_BLOCK_COUNT1000
staticunsignedcharPADDING[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,
};
//CMD5类
classCMD5
{
private:
/*POINTERdefinesagenericpointertype*/
typedefunsignedchar*POINTER;
/*UINT2definesatwobyteword*/
typedefunsignedshortintUINT2;
/*UINT4definesafourbyteword*/
typedefunsignedlongintUINT4;
/*MD5context.*/
typedefstruct_MD5_CTX
{
UINT4state[4];
/*state(ABCD)*/
UINT4count[2];
/*numberofbits,modulo2^64(lsbfirst)*/
unsignedcharbuffer[64];
/*inputbuffer*/
}MD5_CTX;
public:
CMD5(void);
~CMD5(void);
CStringMD5(INconstchar*szText);
CMD5(CMD5&
ObjMd5);
//禁用拷贝构造函数
CMD5&
operator=(CMD5&
//禁用等号
voidMD5TransformPROTO_LIST((UINT4[4],unsignedchar[64]));
voidMD5_memcpyPROTO_LIST((POINTER,POINTER,size_t));
voidMD5_memsetPROTO_LIST((POINTER,int,size_t));
voidMD5InitPROTO_LIST((MD5_CTX*));
voidMD5UpdatePROTO_LIST((MD5_CTX*,unsignedchar*,size_t));
voidMD5FinalPROTO_LIST((unsignedchar[16],MD5_CTX*));
voidStringAddOnePROTO_LIST((char*));
voidEncodePROTO_LIST((unsignedchar*,UINT4*,size_t));
voidDecodePROTO_LIST((UINT4*,unsignedchar*,size_t));
//MD5.cpp//
//MD5.cpp:
定义DLL应用程序的入口点。
//
#include"
stdafx.h"
#include<
stdio.h>
stdlib.h>
string.h>
math.h>
ctype.h>
MD5.h"
//有关类定义的信息,请参阅MD5.h
CMD5:
:
CMD5()
{
}
~CMD5(void)
Digestsastringandprintstheresult.
CStringCMD5:
MD5(INconstchar*szText)
charszMD5StringBuffer[33];
memset(szMD5StringBuffer,0,33);
MD5_CTXcontext;
MD5Init(&
context);
MD5Update(&
context,(unsignedchar*)szText,strlen(szText));
unsignedchardigest[16];
MD5Final(digest,&
context);
for(inti=0;
i<
16;
i++)
sprintf(&
(szMD5StringBuffer[2*i]),"
%02x"
(unsignedchar)digest[i]);
}
returnCString(szMD5StringBuffer);
MD5initialization.BeginsanMD5operation,writinganewcontext.
voidCMD5:
MD5Init(MD5_CTX*context)
context->
count[0]=context->
count[1]=0;
/*
Loadmagicinitializationconstants.
*/
state[0]=0x67452301;
state[1]=0xefcdab89;
state[2]=0x98badcfe;
state[3]=0x10325476;
}
MD5blockupdateoperation.ContinuesanMD5message-digest
operation,processinganothermessageblock,andupdatingthe
context.
MD5Update(
MD5_CTX*context,/*context*/
unsignedchar*input,/*inputblock*/
size_tinputLen/*lengthofinputblock*/
)
size_ti,index,partLen;
/*Computenumberofbytesmod64*/
index=(size_t)((context->
count[0]>
3)&
0x3F);
/*Updatenumberofbits*/
if((context->
count[0]+=((UINT4)inputLen<
3))
<
((UINT4)inputLen<
context->
count[1]++;
count[1]+=((UINT4)inputLen>
29);
partLen=64-index;
/*Transformasmanytimesaspossible.*/
if(inputLen>
=partLen){
MD5_memcpy
((POINTER)&
context->
buffer[index],(POINTER)input,partLen);
MD5Transform(context->
state,context->
buffer);
for(i=partLen;
i+63<
inputLen;
i+=64)
MD5Transform(context->
state,&
input[i]);
index=0;
else
i=0;
/*Bufferremaininginput*/
MD5_memcpy
((POINTER)&
buffer[index],(POINTER)&
input[i],
inputLen-i);
MD5finalization.EndsanMD5message-digestoperation,writingthe
themessagedigestandzeroizingthecontext.
MD5Final(
unsignedchardigest[16],/*messagedigest*/
MD5_CTX*context/*context*/
unsignedcharbits[8];
size_tindex,padLen;
/*Savenumberofbits*/
Encode(bits,context->
count,8);
/*Padoutto56mod64.*/
0x3f);
padLen=(index<
56)?
(56-index):
(120-index);
MD5Update(context,PADDING,padLen);
/*Appendlength(beforepadding)*/
MD5Update(context,bits,8);
/*Storestateindigest*/
Encode(digest,context->
state,16);
/*Zeroizesensitiveinformation.*/
MD5_memset((POINTER)context,0,sizeof(*context));
MD5basictransformation.Transformsstatebasedonblock.
MD5Transform(
UINT4state[4],
unsignedcharblock[64]
)
UINT4a=state[0],b=state[1],c=state[2],d=state[3],x[16];
Decode(x,block,64);
/*Round1*/
FF(a,b,c,d,x[0],S11,0xd76aa478);
/*1*/
FF(d,a,b,c,x[1],S12,0xe8c7b756);
/*2*/
FF(c,d,a,b,x[2],S13,0x242070db);
/*3*/
FF(b,c,d,a,x[3],S14,0xc1bdceee);
/*4*/
FF(a,b,c,d,x[4],S11,0xf57c0faf);
/*5*/
FF(d,a,b,c,x[5],S12,0x4787c62a);
/*6*/
FF(c,d,a,b,x[6],S13,0xa8304613);
/*7*/
FF(b,c,d,a,x[7],S14,0xfd469501);
/*8*/
FF(a,b,c,d,x[8],S11,0x698098d8);
/*9*/
FF(d,a,b,c,x[9],S12,0x8b44f7af);
/*10*/
FF(c,d,a,b,x[10],S13,0xffff5bb1);
/*11*/
FF(b,c,d,a,x[11],S14,0x895cd7be);
/*12*/
FF(a,b,c,d,x[12],S11,0x6b901122);
/*13*/
FF(d,a,b,c,x[13],S12,0xfd987193);
/*14*/
FF(c,d,a,b,x[14],S13,0xa679438e);
/*15*/
FF(b,c,d,a,x[15],S14,0x49b40821);
/*16*/
/*Round2*/
GG(a,b,c,d,x[1],S21,0xf61e2562);
/*17*/
GG(d,a,b,c,x[6],S22,0xc040b340);
/*18*/
GG(c,d,a,b,x[11],S23,0x265e5a51);
/*19*/
GG(b,c,d,a,x[0],S24,0xe9b6c7aa);
/*20*/
GG(a,b,c,d,x[5],S21,0xd62f105d);
/*21*/
GG(d,a,b,c,x[10],S22,0x2441453);
/*22*/
GG(c,d,a,b,x[15],S23,0xd8a1e681);
/*23*/
GG(b,c,d,a,x[4],S24,0xe7d3fbc8);
/*24*/
GG(a,b,c,d,x[9],S21,0x21e1cde6);
/*25*/
GG(d,a,b,c,x[14],S22,0xc33707d6);
/*26*/
GG(c,d,a,b,x[3],S23,0xf4d50d87);
/*27*/
GG(b,c,d,a,x[8],S24,0x455a14ed);
/*28*/
GG(a,b,c,d,x[13],S21,0xa9e3e905);
/*29*/
GG(d,a,b,c,x[2],S22,0xfcefa3f8);
/*30*/
GG(c,d,a,b,x[7],S23,0x676f02d9);
/*31*/
GG(b,c,d,a,x[12],S24,0x8d2a4c8a);
/*32*/
/*Round3*/
HH(a,b,c,d,x[5],S31,0xfffa3942);
/*33*/
HH(d,a,b,c,x[8],S32,0x8771f681);
/*34*/
HH(c,d,a,b,x[11],S33,0x6d9d6122);
/*35*/
HH(b,c,d,a,x[14],S34,0xfde5380c);
/*36*/
HH(a,b,c,d,x[1],S31,0xa4beea44);
/*37*/
HH(d,a,b,c,x[4],S32,0x4bdecfa9);
/*38*/
HH(c,d,a,b,x[7],S33,0xf6bb4b60);
/*39*/
HH(b,c,d,a,x[10],S34,0xbebfbc70);
/*40*/
HH(a,b,c,d,x[13],S31,0x289b7ec6);
/*41*/
HH(d,a,b,c,x[0],S32,0xeaa127fa);
/*42*/
HH(c,d,a,b,x[3],S33,0xd4ef3085);
/*43*/
HH(b,c,d,a,x[6],S34,0x4881d05);
/*44*/
HH(a,b,c,d,x[9],S31,0xd9d4d039);
/*45*/
HH(d,a,b,c,x[12],S32,0xe6db99e5);
/*46*/
HH(c,d,a,b,x[15],S33,0x1fa27cf8);
/*47*/
HH(b,c,d,a,x[2],S34,0xc4ac5665);
/*48*/
/*Round4*/
II(a,b,c,d,x[0],S41,0xf4292244);
/*49*/
II(d,a,b,c,x[7],S42,0x432aff97);
/*50*/
II(c,d,a,b,x[14],S43,0xab9423a7);
/*51*/
II(b,c,d,a,x[5],S44,0xfc93a039);
/*52*/
II(a,b,c,d,x[12],S41,0x655b59c3);
/*53*/
II(d,a,b,c,x[3],S42,0x8f0ccc92);
/*54*/
II(c,d,a,b,x[10],S43,0xffeff47d);
/*55*/
II(b,c,d,a,x[1],S44,0x85845dd1);
/*56*/
II(a,b,c,d,x[8],S41,0x6fa87e4f);
/*57*/
II(d,a,b,c,x[15],S42,0xfe2ce6e0);
/*58*/
II(c,d,a,b,x[6],S43,0xa3014314);
/*59*/
II(b,c,d,a,x[13],S44,0x4e0811a1);
/*60*/
II(a,b,c,d,x[4],S41,0xf7537e82);
/*61*/
II(d,a,b,c,x[11],S42,0xbd3af235);
/*62*/
II(c,d,a,b,x[2],S43,0x2ad7d2bb);
/*63*/
II(b,c,d,a,x[9],S44,0xeb86d391);
/*64*/
state[0]+=a;
state[1]+=b;
state[2]+=c;
state[3]+=d;
MD5_memset((POINTER)x,0,sizeof(x));
Encode
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