WOL Apgar Routine

Published in

Sean’s Blog

Aug 26, 2010

APGAR is an encrypted token sent to the server to identify a user’s password. This is a one-way encryption routine and cannot be decrypted. All legacy Command and Conquer game client passwords using this algorithm must be exactly 8 characters long.

Psuedo-code implementation

function apgar(input)  
  lookup = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
  out = ""
  i = 1

  while (i <= 8)
    left = ascii value of input[ i ]
    right = ascii value of input[ length[input] - i ]

    if left is odd 
        x = ((left * 2) XOR (left AND 1)) AND right
    else
        x = left XOR right

    out += lookup[x AND 63]
    i++

  return out

PHP Implementation (Sean Wragg)

Javascript Implementation (Sean Wragg)

C++ Implementation (RenegadeProjects.com)

mIRC Script Implementation (Frank Razenberg)

Originally published at seanwragg.com on August 26, 2010.