View difference between Paste ID: iwLuetvU and cqmFSFnL

 #include <stdio.h>
 #include <stdlib.h>
 #include <time.h>
 #include <string.h>
 
 
 int generate_mask(int len_c,unsigned char *mask)
 {
     srand (time(NULL));
     int i;
     for(i=0;i<len_c;++i)
         mask[i]=rand()% 255 + 1;   // randomn key between 1 and 255, extented ascii
 
 mask[len_c]='\0';
 
     return 0;
 }
 
 
 int generate_encryption(unsigned char *cipher,unsigned char *mask,unsigned char *crypted,int len_c)
 {
 
     int i;
     for(i=0;i<len_c;++i)
        {
            if( (mask[i]+cipher[i]) > 255 ) // is the result superior to the table ?
                 crypted[i]=(mask[i]+cipher[i]) % 255; // if yes, we make a modulo
            else
                 crypted[i]=mask[i]+cipher[i];
        }
 
     crypted[len_c]='\0';
 
     return 0;
 }
 
 int main(int argc, char *argv[])
 {
 if(argc == 2)
    {
     int len_c=strlen(argv[1]);
     unsigned char *mask=(unsigned char *)malloc(sizeof(char)*len_c+1);
     unsigned char *crypted=(unsigned char *)malloc(sizeof(char)*len_c+1);
 
 
     generate_mask(len_c,mask);
 
     generate_encryption((unsigned char *)argv[1],mask,crypted,len_c);
 
     printf("Message: %s\n Mask: %s\n Crypted: %s\n",argv[1],mask,crypted);
     free(mask);
     free(crypted);
    }
 
 else
     fprintf(stderr,"Usage: ./<executable> <text to encrypt>");