RSA.C
上传用户:bjghjy
上传日期:2007-01-07
资源大小:379k
文件大小:8k
- #include <windows.h>
- #include <dos.h>
- #include <conio.h>
- #include <stdlib.h>
- #include <stdio.h>
- #include <string.h>
- #include <math.h>
- #include <time.h>
- #define DATALENGTH 350
- #define MLENGTH 10
- #define TESTNUM 20
- #define SKLENGTH 5
- #define TEXTLENGTH 20
- typedef signed char byteint[DATALENGTH]; //-128 ->127
- typedef signed char mtype[MLENGTH];
- mtype Model[TESTNUM];
- byteint ONEVALUE,ZEROVALUE,TWOVALUE,EIGHTVALUE;
- void InitInt(void);
- void SetZero(byteint A);
- void IntCpy(byteint A,byteint B);
- int IntValid(byteint validtemp);
- int IntCmp(byteint A,byteint B);
- void Plus(byteint A,byteint B,byteint C);
- void Substract(byteint SA,byteint SB,byteint SC);
- void Multiply(byteint A,byteint B,byteint C);
- void SetMode(byteint A,byteint B,byteint C,byteint D);
- void IntRandom(byteint RandomA,int num);
- void LoadInt(byteint A,mtype B);
- void Mdata(void);
- void TransBi(byteint B,signed char flag[400]);
- int PowerMode(byteint A,byteint C,byteint D,signed char flag[400]);
- int Prime(byteint Prm);
- int ComputingPK(byteint Rvalue,byteint SK,byteint PK);
- int StrToByt(char *str,byteint byt);
- void BytToStr(byteint byt,char *str);
- void PackInt(byteint A,int B);
- byteint R,SK,PK,RsaKey;
- extern int ShoutBlockingHook (void);
- extern char szDataPath[128];
- int RsaPrepare(byteint sk,byteint pk,byteint r)
- {
- byteint p,q,Rvalue,buf1,buf2;
-
- Mdata();
- InitInt();
- Prime(p);
- Prime(q);
- Multiply(p,q,r);
- Substract(p,ONEVALUE,buf1);
- Substract(q,ONEVALUE,buf2);
- Multiply(buf1,buf2,Rvalue);
- ComputingPK(Rvalue,sk,pk);
- return TRUE;
- }
- int ReadRsaFile(byteint r,byteint pk,byteint sk)
- {
- char file[80],temp[100+1];
- sprintf(file,"%s\sys\rsa.dat",szDataPath);
-
- if(GetPrivateProfileString("RSA", "R", "", temp,100, file)!=0)
- StrToByt(temp,r);
- else
- return FALSE;
- if(GetPrivateProfileString("RSA", "PK", "", temp, 100, file)!=0)
- StrToByt(temp,pk);
- else
- return FALSE;
- if(GetPrivateProfileString("RSA", "SK", "", temp, 100, file)!=0)
- StrToByt(temp,sk);
- else
- return FALSE;
- return TRUE;
-
- }
- int WriteRsaFile(byteint r,byteint pk,byteint sk)
- {
- char file[80],temp[100+1];
- sprintf(file,"%s\sys\rsa.dat",szDataPath);
-
- memset(temp,0,100+1);
- BytToStr(r,temp);
- if(WritePrivateProfileString("RSA", "R", temp, file)==0)
- return FALSE;
- memset(temp,0,100+1);
- BytToStr(pk,temp);
- if(WritePrivateProfileString("RSA", "PK", temp, file)==0)
- return FALSE;
- memset(temp,0,100+1);
- BytToStr(sk,temp);
- if(WritePrivateProfileString("RSA", "SK", temp, file)==0)
- return FALSE;
- return TRUE;
- }
- int DecipherDesKey(byteint rsakey,byteint r,byteint sk,char *deskey)
- {
- byteint buf1;
- signed char flag[400];
- Mdata();
- InitInt();
- TransBi(sk,flag);
- PowerMode(rsakey,r,buf1,flag);
- BytToStr(buf1,deskey);
-
- return 0;
- }
- void InitInt(void)
- {
- SetZero(ONEVALUE);
- ONEVALUE[DATALENGTH-1]=1;
- SetZero(ZEROVALUE);
- SetZero(TWOVALUE);
- TWOVALUE[DATALENGTH-1]=2;
- SetZero(EIGHTVALUE);
- EIGHTVALUE[DATALENGTH-1]=8;
- //randomize();
- srand((unsigned)time(NULL));
- }
- void Multiply(byteint A,byteint B,byteint C)
- {
- register i,j,w;
- int X,Y,Z;
- int Avalid=0;
- int Bvalid=0;
- while(A[Avalid]==0 &&Avalid <DATALENGTH)
- Avalid++;
- while(B[Bvalid]==0 &&Bvalid <DATALENGTH)
- Bvalid++;
- SetZero(C);
- for(i=DATALENGTH -1;i>=Avalid;i--)
- {
- for(j=DATALENGTH-1;j>=Bvalid;j--)
- {
- X=A[i]*B[j];
- Y=X/10;
- Z=X-10*Y;
- w=i+j-(DATALENGTH-1);
- C[w]=C[w]+Z;
- C[w-1]=C[w-1]+(C[w]/10)+Y;
- C[w]=C[w]-(C[w]/10)*10;
- }
- }
- }
- void SetZero(byteint A)
- {
- memset(A,0,DATALENGTH);
- }
- void IntCpy(byteint A,byteint B)
- {
- memcpy(A,B,DATALENGTH);
- }
- void Plus(byteint A,byteint B,byteint C)
- {
- register i;
- int X,Y,Z,m,n,valid;
- m=IntValid(A);
- n=IntValid(B);
- valid=(m>n) ? m+1:n+1;
- SetZero(C);
- for(i=DATALENGTH -1;i>=DATALENGTH -valid;i--)
- {
- X=A[i] +B[i];
- Y=X/10;
- Z=X-10*Y;
- C[i]=C[i]+Z;
- C[i-1]=C[i-1]+Y;
- }
- }
- void Substract(byteint SA,byteint SB,byteint SC)
- {
- byteint buf;
- register i,j;
- int X;
- IntCpy(buf,SA);
- SetZero(SC);
- for(i=DATALENGTH-1;i>=0;i--)
- {
- if(buf[i]<SB[i]){
- buf[i]+=10;
- if(buf[i-1]>0)
- (buf[i-1])--;
- else {
- j=i-1;
- while (buf[j]==0)
- buf[j--]=9;
- buf[j]--;
- }
- }
- X=buf[i]-SB[i];
- SC[i]=X;
- }
- }
- int IntCmp(byteint A,byteint B)
- {
- int stat;
- stat =memcmp(A,B,DATALENGTH);
- if(stat ==0)
- return 0;
- if(stat>0)
- return 1;
- return -1;
- }
- int IntValid(byteint validtemp)
- {
- register i=0;
- while (validtemp[i]==0 && i<DATALENGTH)
- i++;
- return DATALENGTH-i;
- }
- void SetMode(byteint A,byteint B,byteint C,byteint D)
- {
- register i,j,k;
- int valid_1,valid_2,valid,sbits,cmpval;
- byteint buf1,buf2;
- SetZero(D);
- IntCpy(C,A);
- valid_2=IntValid(B);
- while((cmpval =IntCmp(C,B))>0){
- valid_1 =IntValid(C);
- valid =valid_1-valid_2;
- if(valid>0){
- i=DATALENGTH -valid_1;
- j=DATALENGTH -valid_2;
- sbits=0;
- for(k=j;k<DATALENGTH;k++){
- if(C[i]>B[j])
- break;
- if(C[i]<B[j]){
- sbits=1;
- break;
- }
- i++;j++;
- }
- valid=valid -sbits;
- SetZero(buf1);
- for(i=valid;i<DATALENGTH;i++){
- j=i-valid;
- buf1[j]=B[i];
- }
- }
- else
- IntCpy(buf1,B);
- D[DATALENGTH-1-valid]++;
- Substract(C,buf1,buf2);
- IntCpy(C,buf2);
- }
- if(cmpval==0){
- SetZero(C);
- D[DATALENGTH-1]++;
- }
- }
- void IntRandom(byteint RandomA,int num)
- {
- int i;
- SetZero(RandomA);
- while(!(RandomA[DATALENGTH-1] % 2))
- RandomA[DATALENGTH-1]=rand() % 10;
- while(!RandomA[DATALENGTH-num])
- RandomA[DATALENGTH-num] =rand() % 10;
- i=DATALENGTH -2;
- while(i>=DATALENGTH -num +1)
- RandomA[i--]=rand() % 10;
- }
- void LoadInt(byteint A,mtype B)
- {
- register i,j;
- SetZero(A);
- i=DATALENGTH -1;
- j=MLENGTH -1;
- while(j>=0)
- A[i--]=B[j--];
- }
- void Mdata(void)
- {
- register i,j;
- int k=MLENGTH -2;
- memset(Model,0,TESTNUM*MLENGTH);
- for(i=0;i<TESTNUM;i++){
- for(j=MLENGTH-1;j>=k;j--)
- Model[i][j]=rand()%10;
- k-=1;
- }
- }
- void TransBi(byteint B,signed char flag[400])
- {
- byteint buf;
- byteint result;
- byteint temp;
- register i;
- memset(flag,0,400);
- i=399;
- IntCpy(buf,B);
- while(IntCmp(buf,ZEROVALUE)==1){
- ShoutBlockingHook();
- SetMode(buf,TWOVALUE,temp,result);
- flag[i]=temp[DATALENGTH -1];
- IntCpy(buf,result);
- i--;
- }
- flag[i] =-1;
- }
- int PowerMode(byteint A,byteint C,byteint D,signed char flag[400])
- {
- byteint buf;
- byteint result;
- byteint temp,P;
- register i;
- IntCpy(temp,A);
- if(flag[399]==1)
- IntCpy(result,A);
- else
- IntCpy(result,ONEVALUE);
- i=398;
- while(flag[i]!=-1){
- ShoutBlockingHook();
- Multiply(temp,temp,buf);
- SetMode(buf,C,temp,P);
- if(flag[i]!=0){
- Multiply(temp,result,buf);
- SetMode(buf,C,result,P);
- }
- i--;
- }
- IntCpy(buf,C);
- IntCpy(D,result);
- Substract(buf,ONEVALUE,temp);
- if(IntCmp(result,ONEVALUE)==0)
- return 1;
- if(IntCmp(result,temp)==0)
- return 2;
- return 0;
- }
- int Prime(byteint Prm)
- {
- int i,k,ok,cnt=0;
- signed char flag[400];
- byteint A,B,D,buf1,buf2;
- int pass=0,pass_2=0;
- while(1){
- ShoutBlockingHook();
- cnt++;
- IntRandom(B,MLENGTH);
- IntCpy(Prm,B);
- Substract(B,ONEVALUE,buf1);
- SetMode(buf1,TWOVALUE,buf2,B);
- TransBi(B,flag);
- ok=1;
- for(i=0;i<TESTNUM;i++){
- LoadInt(A,Model[i]);
- k=PowerMode(A,Prm,D,flag);
- if(k!=1&&k!=2)
- break;
- if(k==2){
- pass_2=1;
- }
- }
- if(ok && pass_2 ){
- return 0;
- }
- }
- }
- int ComputingPK(byteint Rvalue,byteint SK,byteint PK)
- {
- register i;
- byteint PA,PB,PC,buf,temp,buf2;
- SetZero(PK);
- while(1)
- {
- IntRandom(SK,SKLENGTH);
- IntCpy(PB,SK);
- IntCpy(PA,Rvalue);
- while(1) {
- ShoutBlockingHook();
- SetMode(PA,PB,PC,PK);
- i=IntCmp(PC,ONEVALUE);
- if(i==0)
- break;
- i=IntCmp(PC,ZEROVALUE);
- if(i==0){
- i=-1;
- break;
- }
- IntCpy(PA,PB);
- IntCpy(PB,PC);
- }
- if(i==0)
- break;
- }
- IntCpy(temp,ONEVALUE);
- IntCpy(PA,Rvalue);
- IntCpy(PB,SK);
- while (1){
- Multiply(PA,temp,buf);
- Plus(buf,ONEVALUE,buf2);
- SetMode(buf2,PB,buf,PK);
- if(IntCmp(buf,ZEROVALUE)==0)
- break;
- Plus(temp,ONEVALUE,buf);
- IntCpy(temp,buf);
- }
- return 1;
- }
- void PackInt(byteint A,int B)
- {
- register i=DATALENGTH-1;
- SetZero(A);
- while(B>0){
- A[i--]=B % 10;
- B=B/10;
- }
- }
- int StrToByt(char *str,byteint byt)
- {
- unsigned int m;
-
- SetZero(byt);
- for(m=0;m<strlen(str);m++)
- byt[DATALENGTH-1-m]=str[strlen(str)-m-1]-'0';
- return 1;
- }
- void BytToStr(byteint byt,char *str)
- {
- unsigned int i=0,j=0;
- while(i<DATALENGTH&&byt[i]==0) i++;
- for(;i<DATALENGTH;i++,j++)
- {
- str[j] =byt[i]+'0';
- }
- }