def test_https_cert_invalid(self):
"""Verify vikidia SSL certificate is invalid."""
try:
from pyasn1_modules import pem, rfc2459
from pyasn1.codec.der import decoder
except ImportError:
raise unittest.SkipTest('pyasn1 and pyasn1_modules not available.')
import ssl
import io
cert = ssl.get_server_certificate(addr=('en.vikidia.org', 443))
s = io.StringIO(unicode(cert))
substrate = pem.readPemFromFile(s)
cert = decoder.decode(substrate, asn1Spec=rfc2459.Certificate())[0]
tbs_cert = cert.getComponentByName('tbsCertificate')
issuer = tbs_cert.getComponentByName('issuer')
organisation = None
for rdn in issuer.getComponent():
for attr in rdn:
attr_type = attr.getComponentByName('type')
if attr_type == rfc2459.id_at_organizationName:
value, _ = decoder.decode(attr.getComponentByName('value'),
asn1Spec=rfc2459.X520name())
organisation = str(value.getComponent())
break
self.assertEqual(organisation, 'TuxFamily.org non-profit organization')
def get_subject(f):
""" return a list of subjects frmo a tbsCertificate
"""
tbs = f.read()
res = []
# based on the original ct tools
cert, rest = decoder.decode(tbs, asn1Spec=TBSCertificate())
# First, try the CN field in the subject
subject = cert['subject']
l = subject.getComponent()
for i in l:
for attr in i:
if attr['type'] == rfc2459.id_at_commonName:
val, rest = decoder.decode(attr.getComponentByName('value'),
asn1Spec=rfc2459.X520name())
valt = val.getName()
val = val.getComponent()
s = decode_string(valt, val)
if (" " not in s):
res.append(s)
# Now, try the SubjectAlternativeName in the extensions
try:
# based on https://github.com/google/certificate-transparency/blob/master/cpp/client/fix-chain.py
ext = cert['extensions']
for i in ext:
oid = i['extnID']
if oid != rfc2459.id_ce_subjectAltName:
continue
subject_alt_names_raw = decoder.decode(
i.getComponentByName('extnValue'),
asn1Spec=pyasn1.type.univ.OctetString())[0]
subject_alt_names = decoder.decode(
subject_alt_names_raw, asn1Spec=rfc2459.SubjectAltName())[0]
for general_name in subject_alt_names:
subject_alt_name_type = general_name.getName()
subject_alt_name_value = general_name.getComponent()
if (subject_alt_name_type == "dNSName"):
res.append(str(subject_alt_name_value))
except:
pass
return res
def DNToString(dn):
rdns = dn.getComponent()
ret = ''
for rdn in rdns:
ret += '['
for attr in rdn:
attrType = attr.getComponentByName('type')
if attrType == rfc2459.emailAddress:
val, rest = decoder.decode(attr.getComponentByName('value'),
asn1Spec=rfc2459.Pkcs9email())
assert rest == ""
# Strictly speaking, this is IA5, not ASCII.
val = str(val).decode('ascii')
else:
val, rest = decoder.decode(attr.getComponentByName('value'),
asn1Spec=rfc2459.X520name())
assert rest == ""
valt = val.getName()
val = val.getComponent()
if valt == 'printableString':
val = str(val)
elif valt == 'teletexString':
# Strictly this is a T.61 string. T.61 no longer exists as a
# standard and some certs mark ISO 8859-1 as
# teletexString. And we should never see this, but we do.
val = str(val).decode('iso8859-1')
elif valt == 'utf8String':
val = str(val)
else:
print valt
assert False
assert val is not None
ret += '/' + str(attrType) + '=' + val
ret += ']'
return ret
