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# Copyright (C) Jean-Paul Calderone
# See LICENSE for details.
import sys
from OpenSSL.crypto import (
FILETYPE_PEM,
TYPE_DSA,
Error,
PKey,
X509,
load_privatekey,
CRL,
Revoked,
get_elliptic_curves,
_X509_REVOKED_dup,
)
from OpenSSL._util import lib as _lib
class BaseChecker(object):
def __init__(self, iterations):
self.iterations = iterations
class Checker_X509_get_pubkey(BaseChecker):
"""
Leak checks for L{X509.get_pubkey}.
"""
def check_exception(self):
"""
Call the method repeatedly such that it will raise an exception.
"""
for i in xrange(self.iterations):
cert = X509()
try:
cert.get_pubkey()
except Error:
pass
def check_success(self):
"""
Call the method repeatedly such that it will return a PKey object.
"""
small = xrange(3)
for i in xrange(self.iterations):
key = PKey()
key.generate_key(TYPE_DSA, 256)
for i in small:
cert = X509()
cert.set_pubkey(key)
for i in small:
cert.get_pubkey()
class Checker_load_privatekey(BaseChecker):
"""
Leak checks for :py:obj:`load_privatekey`.
"""
ENCRYPTED_PEM = """\
-----BEGIN RSA PRIVATE KEY-----
Proc-Type: 4,ENCRYPTED
DEK-Info: BF-CBC,3763C340F9B5A1D0
a/DO10mLjHLCAOG8/Hc5Lbuh3pfjvcTZiCexShP+tupkp0VxW2YbZjML8uoXrpA6
fSPUo7cEC+r96GjV03ZIVhjmsxxesdWMpfkzXRpG8rUbWEW2KcCJWdSX8bEkuNW3
uvAXdXZwiOrm56ANDo/48gj27GcLwnlA8ld39+ylAzkUJ1tcMVzzTjfcyd6BMFpR
Yjg23ikseug6iWEsZQormdl0ITdYzmFpM+YYsG7kmmmi4UjCEYfb9zFaqJn+WZT2
qXxmo2ZPFzmEVkuB46mf5GCqMwLRN2QTbIZX2+Dljj1Hfo5erf5jROewE/yzcTwO
FCB5K3c2kkTv2KjcCAimjxkE+SBKfHg35W0wB0AWkXpVFO5W/TbHg4tqtkpt/KMn
/MPnSxvYr/vEqYMfW4Y83c45iqK0Cyr2pwY60lcn8Kk=
-----END RSA PRIVATE KEY-----
"""
def check_load_privatekey_callback(self):
"""
Call the function with an encrypted PEM and a passphrase callback.
"""
for i in xrange(self.iterations * 10):
load_privatekey(
FILETYPE_PEM, self.ENCRYPTED_PEM, lambda *args: "hello, secret"
)
def check_load_privatekey_callback_incorrect(self):
"""
Call the function with an encrypted PEM and a passphrase callback which
returns the wrong passphrase.
"""
for i in xrange(self.iterations * 10):
try:
load_privatekey(
FILETYPE_PEM,
self.ENCRYPTED_PEM,
lambda *args: "hello, public",
)
except Error:
pass
def check_load_privatekey_callback_wrong_type(self):
"""
Call the function with an encrypted PEM and a passphrase callback which
returns a non-string.
"""
for i in xrange(self.iterations * 10):
try:
load_privatekey(
FILETYPE_PEM, self.ENCRYPTED_PEM, lambda *args: {}
)
except ValueError:
pass
class Checker_CRL(BaseChecker):
"""
Leak checks for L{CRL.add_revoked} and L{CRL.get_revoked}.
"""
def check_add_revoked(self):
"""
Call the add_revoked method repeatedly on an empty CRL.
"""
for i in xrange(self.iterations * 200):
CRL().add_revoked(Revoked())
def check_get_revoked(self):
"""
Create a CRL object with 100 Revoked objects, then call the
get_revoked method repeatedly.
"""
crl = CRL()
for i in xrange(100):
crl.add_revoked(Revoked())
for i in xrange(self.iterations):
crl.get_revoked()
class Checker_X509_REVOKED_dup(BaseChecker):
"""
Leak checks for :py:obj:`_X509_REVOKED_dup`.
"""
def check_X509_REVOKED_dup(self):
"""
Copy an empty Revoked object repeatedly. The copy is not garbage
collected, therefore it needs to be manually freed.
"""
for i in xrange(self.iterations * 100):
revoked_copy = _X509_REVOKED_dup(Revoked()._revoked)
_lib.X509_REVOKED_free(revoked_copy)
class Checker_EllipticCurve(BaseChecker):
"""
Leak checks for :py:obj:`_EllipticCurve`.
"""
def check_to_EC_KEY(self):
"""
Repeatedly create an EC_KEY* from an :py:obj:`_EllipticCurve`. The
structure should be automatically garbage collected.
"""
curves = get_elliptic_curves()
if curves:
curve = next(iter(curves))
for i in xrange(self.iterations * 1000):
curve._to_EC_KEY()
def vmsize():
return [x for x in file("/proc/self/status").readlines() if "VmSize" in x]
def main(iterations="1000"):
iterations = int(iterations)
for klass in globals():
if klass.startswith("Checker_"):
klass = globals()[klass]
print klass
checker = klass(iterations)
for meth in dir(checker):
if meth.startswith("check_"):
print "\t", meth, vmsize(), "...",
getattr(checker, meth)()
print vmsize()
if __name__ == "__main__":
main(*sys.argv[1:])
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