helpers.py 文件源码

def check_rsa_key(sample):
   """
   Returns a 3-tuple (is_rsa_key, has_private_component, n_bit_length)

   is_rsa_key - a bool indicating that the sample is, in fact, an RSA key
      in a format readable by Crypto.PublicKey.RSA.importKey
   has_private_component - a bool indicating whether or not d was in the
      analyzed key, or false if the sample is not an RSA key
   n_bit_length - an int representing the bit length of the modulus found
      in the analyzed key, or False if the sample is not an RSA key
   """
   is_rsa_key = has_private_component = n_bit_length = False

   try:
      rsakey = RSA.importKey(sample.strip())
      is_rsa_key = True
      if rsakey.has_private():
         has_private_component = True
      n_bit_length = gmpy.mpz(rsakey.n).bit_length()
   # Don't really care why it fails, just want to see if it did
   except:
      is_rsa_key = False
   return (is_rsa_key, has_private_component, n_bit_length)