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  1. #include <iostream>
  2.  
  3. typedef unsigned char byte;
  4.  
  5. byte calc_iv(byte buffer[], size_t len)
  6. {
  7.     int iv = 0;
  8.     for(int i = 0; i < len; i++) {
  9.         byte I = buffer[i];
  10.         iv += I;
  11.         iv *= I + 1;
  12.     }
  13.     return iv / (len);
  14. }
  15.  
  16. int main(){
  17.     byte buf[] = {41, 32, 16};
  18.     byte iv = calc_iv(buf, sizeof(buf)/sizeof(buf[0]));
  19.     std::cout<<(int)iv<<std::endl;
  20.  
  21.     return 0;
  22. }
  23.  
Success #stdin #stdout 0s 4540KB
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https://ideone.com/qweEaJ
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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