def get_modulus_exponent_from_cert_and_pkey_pemfile(cert_path='/tmp/xmppwebid_cert.pem',
key_path='/tmp/xmppwebid_key.key'):
"""Get the modulus and exponent of RSA key from a PEM Certificate and
key files
m2.rsa_get_e(rsa.rsa) return something like '\x00\x00\x00\x03\x01\x00\x01'
so to get the decimal value (65537), two crufty methods
:param cert_path: certificate path
:type cert_path: string
:param key_path: key path
:type key_path: string
:return: tuple(modulus, exponent)
:rtype: tuple (hex, int)
.. TODO::
replace the exponent method with something cleaner
"""
cert=X509.load_cert(cert_path)
pubkey = cert.get_pubkey()
modulus = pubkey.get_modulus()
pkey_rsa = RSA.load_key(key_path)
e = m2.rsa_get_e(pkey_rsa.rsa)
# exponent = int(eval(repr(e[-3:]).replace('\\x', '')),16)
exponent = int(''.join(["%2.2d" % ord(x) for x in e[-3:]]),16)
return modulus, exponent
def __getattr__(self, name):
if name == 'e':
return m2.rsa_get_e(self.rsa)
elif name == 'n':
return m2.rsa_get_n(self.rsa)
else:
raise AttributeError
def __getattr__(self, name):
if name == 'e':
return m2.rsa_get_e(self.rsa)
elif name == 'n':
return m2.rsa_get_n(self.rsa)
else:
raise AttributeError
def get_modulus_exponent_from_cert_and_pkey_pemfile(
cert_path='/tmp/xmppwebid_cert.pem',
key_path='/tmp/xmppwebid_key.key'):
"""Get the modulus and exponent of RSA key from a PEM Certificate and
key files
m2.rsa_get_e(rsa.rsa) return something like '\x00\x00\x00\x03\x01\x00\x01'
so to get the decimal value (65537), two crufty methods
:param cert_path: certificate path
:type cert_path: string
:param key_path: key path
:type key_path: string
:return: tuple(modulus, exponent)
:rtype: tuple (hex, int)
.. TODO::
replace the exponent method with something cleaner
"""
cert = X509.load_cert(cert_path)
pubkey = cert.get_pubkey()
modulus = pubkey.get_modulus()
pkey_rsa = RSA.load_key(key_path)
e = m2.rsa_get_e(pkey_rsa.rsa)
# exponent = int(eval(repr(e[-3:]).replace('\\x', '')),16)
exponent = int(''.join(["%2.2d" % ord(x) for x in e[-3:]]), 16)
return modulus, exponent
def __getattr__(self, name):
# type: (str) -> bytes
if name == 'e':
return m2.rsa_get_e(self.rsa)
elif name == 'n':
return m2.rsa_get_n(self.rsa)
else:
raise AttributeError
def __getattr__(self, name):
# type: (str) -> bytes
if name == 'e':
return m2.rsa_get_e(self.rsa)
elif name == 'n':
return m2.rsa_get_n(self.rsa)
else:
raise AttributeError
def test_set_e(self):
rsa = m2.rsa_new()
m2.rsa_set_e(rsa, b'\000\000\000\003\001\000\001')
n = m2.rsa_get_n(rsa)
e = m2.rsa_get_e(rsa)
self.assertEqual(e, b'\000\000\000\003\001\000\001')
self.assertEqual(n, b'\x00\x00\x00\x00')
def parse_der(der):
cert = X509.load_cert_der_string(der)
#log.debug('PARSING CERTIFICATE %s', cert.get_subject().as_text())
rsa = cert.get_pubkey().get_rsa()
e = mpi_to_num(m2.rsa_get_e(rsa.rsa))
n = mpi_to_num(m2.rsa_get_n(rsa.rsa))
return (n, e)
def test_set_n_then_set_e(self):
rsa = m2.rsa_new()
m2.rsa_set_n(rsa, b'\000\000\000\004\020\011\006\006')
m2.rsa_set_e(rsa, b'\000\000\000\003\001\000\001')
n = m2.rsa_get_n(rsa)
e = m2.rsa_get_e(rsa)
self.assertEqual(e, b'\000\000\000\003\001\000\001')
self.assertEqual(n, b'\000\000\000\004\020\011\006\006')
def get_modulus_exponent_from_cert_file(cert_path='/tmp/xmpp_foaf_cert.pem'):
"""
Get the modulus and exponent of RSA Public Key from a PEM Certificate file
m2.rsa_get_e(rsa.rsa) return something like '\x00\x00\x00\x03\x01\x00\x01'
so to get the decimal value (65537), two crufty methods
@param cert_path: certificate path
@type cert_path: string
@return: tuple(modulus, exponent)
@rtype: tuple (hex, int)
@TODO: replace the exponent method with something cleaner
"""
cert=X509.load_cert(cert_path)
pubkey = cert.get_pubkey()
modulus = pubkey.get_modulus()
pk_rsa = pubkey.get_rsa()
e = m2.rsa_get_e(rsa.rsa)
# exponent = int(eval(repr(e[-3:]).replace('\\x', '')),16)
exponent = int(''.join(["%2.2d" % ord(x) for x in e[-3:]]),16)
return modulus, exponent
def pub(self):
# type: () -> Tuple[bytes, bytes]
assert self.check_key(), 'key is not initialised'
return m2.rsa_get_e(self.rsa), m2.rsa_get_n(self.rsa)
def pub(self):
assert self.check_key(), 'key is not initialised'
return m2.rsa_get_e(self.rsa), m2.rsa_get_n(self.rsa)
def pub(self):
assert self.check_key(), 'key is not initialised'
return m2.rsa_get_e(self.rsa), m2.rsa_get_n(self.rsa)
def pub(self):
# type: () -> Tuple[bytes, bytes]
assert self.check_key(), 'key is not initialised'
return m2.rsa_get_e(self.rsa), m2.rsa_get_n(self.rsa)
