code: def inttoDER(a):
      '''
      Format an int/long to DER hex format
      '''
  
      o = dechex(a,1)
      if int(o[:2],16) > 127:
          o = '00' + o
      olen = dechex(len(o)//2,1)
      return '02' + olen + f inttoDER(a):
      '''
      Format an int/long to DER hex format
      '''
  
      o = dechex(a,1)
      if int(o[:2],16) > 127:
          o = '00' + o
      olen = dechex(len(o)//2,1)
      return '02' + olen + o
docs: Format an int/long to DER hex format