void msa_decryption(char file1[],char file3[])
{
char file4[50]={'T','E','M','P','1','.','D','A','T','\0'};
long int i,nrec,nloop,flag,n1;
int a;
unsigned char ch;
clrscr();
nrec=0;
/*keygen();
randomization();*/
fp1=fopen(file1,"rb");
fp2=fopen(file4,"wb");
n1=0;
while(fscanf(fp1,"%c",&ch)>0)
{
fprintf(fp2,"%c",ch);
n1++;
}
fcloseall();
for(a=0;a<secure;a++)
{
fp1=fopen(file4,"rb");
fp2=fopen(file3,"wb");
while(fscanf(fp1,"%c",&ch)>0)
nrec++;
rewind(fp1);
nloop=nrec/2;
if((nrec%2)!=0)
flag=1;
else
flag=0;
for(i=1;i<=nloop;i++)
{
fread(&mydata1,sizeof(mydata1),1,fp1);
if(mydata1.str[0] == mydata1.str[1])
{
decrypt1(mydata1.str[0],mat);
decrypt1(mydata1.str[1],mat);
}
else
decrypt(mydata1.str[0],mydata1.str[1],mat);
}
if(flag==1)
{
fscanf(fp1,"%c",&ch);
fprintf(fp2,"%c",ch);
}
fcloseall();
nrec=0;
fp1=fopen(file3,"rb");
fp2=fopen(file4,"wb");
while(fscanf(fp1,"%c",&ch)>0)
fprintf(fp2,"%c",ch);
fcloseall();
} /*End of Decryption Process*/
/* system("del TEMP.DAT"); */ /* Removing temporary file */
}
int main()
{
printf("A858 Tools 0.0.1 by gregalerna, 2015. Mode 0 to decrypt given key.\nMode 1 to find out IV given method and key. Select mode (0/1)\n");//intro
scanf("%s", &character);//select mode
if (character == '1') { printf("Try to brute force IV? (y/n)\n");scanf("%s", &character);if (character != 'y') { return 0; } printf("Key: ");scanf("%s", &pass); printf("Method: "); scanf("%s", &variety);decrypt1(); }
else {//mode 0
printf("Try to decypt data.bin? (y/n)\n");
scanf("%s", &character);
if (character != 'y') { return 0; }
printf("Key: ");
scanf("%s", &pass);
decrypt0();
}
fclose(data);//close data.bin
fclose(output);//close output.bin
if (success == true && mode1==false) { printf("Decryption successful with %s\n",middleCommand); }
if (mode1==true){ printf("Possible IV was %s\n", stringiv); }
if(mode1==false &&success==false) { printf("Decryption failed with OpenSSL\n"); }
return 0;
}
