def load_der_x509_certificate(self, data):
mem_bio = self._bytes_to_bio(data)
x509 = self._lib.d2i_X509_bio(mem_bio.bio, self._ffi.NULL)
if x509 == self._ffi.NULL:
self._consume_errors()
raise ValueError("Unable to load certificate")
x509 = self._ffi.gc(x509, self._lib.X509_free)
return _Certificate(self, x509)
def get_subj_alt_name(peer_cert):
"""
Given an PyOpenSSL certificate, provides all the subject alternative names.
"""
# Pass the cert to cryptography, which has much better APIs for this.
if hasattr(peer_cert, "to_cryptography"):
cert = peer_cert.to_cryptography()
else:
# This is technically using private APIs, but should work across all
# relevant versions before PyOpenSSL got a proper API for this.
cert = _Certificate(openssl_backend, peer_cert._x509)
# We want to find the SAN extension. Ask Cryptography to locate it (it's
# faster than looping in Python)
try:
ext = cert.extensions.get_extension_for_class(
x509.SubjectAlternativeName
).value
except x509.ExtensionNotFound:
# No such extension, return the empty list.
return []
except (x509.DuplicateExtension, UnsupportedExtension,
x509.UnsupportedGeneralNameType, UnicodeError) as e:
# A problem has been found with the quality of the certificate. Assume
# no SAN field is present.
log.warning(
"A problem was encountered with the certificate that prevented "
"urllib3 from finding the SubjectAlternativeName field. This can "
"affect certificate validation. The error was %s",
e,
)
return []
# We want to return dNSName and iPAddress fields. We need to cast the IPs
# back to strings because the match_hostname function wants them as
# strings.
# Sadly the DNS names need to be idna encoded and then, on Python 3, UTF-8
# decoded. This is pretty frustrating, but that's what the standard library
# does with certificates, and so we need to attempt to do the same.
# We also want to skip over names which cannot be idna encoded.
names = [
('DNS', name) for name in map(_dnsname_to_stdlib, ext.get_values_for_type(x509.DNSName))
if name is not None
]
names.extend(
('IP Address', str(name))
for name in ext.get_values_for_type(x509.IPAddress)
)
return names
def get_subj_alt_name(peer_cert):
"""
Given an PyOpenSSL certificate, provides all the subject alternative names.
"""
# Pass the cert to cryptography, which has much better APIs for this.
if hasattr(peer_cert, "to_cryptography"):
cert = peer_cert.to_cryptography()
else:
# This is technically using private APIs, but should work across all
# relevant versions before PyOpenSSL got a proper API for this.
cert = _Certificate(openssl_backend, peer_cert._x509)
# We want to find the SAN extension. Ask Cryptography to locate it (it's
# faster than looping in Python)
try:
ext = cert.extensions.get_extension_for_class(
x509.SubjectAlternativeName).value
except x509.ExtensionNotFound:
# No such extension, return the empty list.
return []
except (
x509.DuplicateExtension,
UnsupportedExtension,
x509.UnsupportedGeneralNameType,
UnicodeError,
) as e:
# A problem has been found with the quality of the certificate. Assume
# no SAN field is present.
log.warning(
"A problem was encountered with the certificate that prevented "
"urllib3 from finding the SubjectAlternativeName field. This can "
"affect certificate validation. The error was %s",
e,
)
return []
# We want to return dNSName and iPAddress fields. We need to cast the IPs
# back to strings because the match_hostname function wants them as
# strings.
# Sadly the DNS names need to be idna encoded and then, on Python 3, UTF-8
# decoded. This is pretty frustrating, but that's what the standard library
# does with certificates, and so we need to attempt to do the same.
# We also want to skip over names which cannot be idna encoded.
names = [("DNS", name) for name in map(
_dnsname_to_stdlib, ext.get_values_for_type(x509.DNSName))
if name is not None]
names.extend(("IP Address", str(name))
for name in ext.get_values_for_type(x509.IPAddress))
return names
def certificates(self):
sk_x509 = self._backend._lib.OCSP_resp_get0_certs(self._basic)
num = self._backend._lib.sk_X509_num(sk_x509)
certs = []
for i in range(num):
x509 = self._backend._lib.sk_X509_value(sk_x509, i)
self._backend.openssl_assert(x509 != self._backend._ffi.NULL)
cert = _Certificate(self._backend, x509)
# We need to keep the OCSP response that the certificate came from
# alive until the Certificate object itself goes out of scope, so
# we give it a private reference.
cert._ocsp_resp = self
certs.append(cert)
return certs
def certificates(self):
sk_x509 = self._backend._lib.OCSP_resp_get0_certs(self._basic)
num = self._backend._lib.sk_X509_num(sk_x509)
certs = []
for i in range(num):
x509 = self._backend._lib.sk_X509_value(sk_x509, i)
self._backend.openssl_assert(x509 != self._backend._ffi.NULL)
cert = _Certificate(self._backend, x509)
# We need to keep the OCSP response that the certificate came from
# alive until the Certificate object itself goes out of scope, so
# we give it a private reference.
cert._ocsp_resp = self
certs.append(cert)
return certs
def get_subj_alt_name(peer_cert):
"""
Given an PyOpenSSL certificate, provides all the subject alternative names.
"""
# Pass the cert to cryptography, which has much better APIs for this.
if hasattr(peer_cert, "to_cryptography"):
cert = peer_cert.to_cryptography()
else:
# This is technically using private APIs, but should work across all
# relevant versions before PyOpenSSL got a proper API for this.
cert = _Certificate(openssl_backend, peer_cert._x509)
# We want to find the SAN extension. Ask Cryptography to locate it (it's
# faster than looping in Python)
try:
def certificates(self) -> typing.List[x509.Certificate]:
self._requires_successful_response()
sk_x509 = self._backend._lib.OCSP_resp_get0_certs(self._basic)
num = self._backend._lib.sk_X509_num(sk_x509)
certs: typing.List[x509.Certificate] = []
for i in range(num):
x509_ptr = self._backend._lib.sk_X509_value(sk_x509, i)
self._backend.openssl_assert(x509_ptr != self._backend._ffi.NULL)
cert = _Certificate(self._backend, x509_ptr)
# We need to keep the OCSP response that the certificate came from
# alive until the Certificate object itself goes out of scope, so
# we give it a private reference.
cert._ocsp_resp_ref = self
certs.append(cert)
return certs
def create_x509_certificate(self, builder, private_key, algorithm):
if not isinstance(builder, x509.CertificateBuilder):
raise TypeError('Builder type mismatch.')
if not isinstance(algorithm, hashes.HashAlgorithm):
raise TypeError('Algorithm must be a registered hash algorithm.')
if (
isinstance(algorithm, hashes.MD5) and not
isinstance(private_key, rsa.RSAPrivateKey)
):
raise ValueError(
"MD5 is not a supported hash algorithm for EC/DSA certificates"
)
# Resolve the signature algorithm.
evp_md = self._lib.EVP_get_digestbyname(
algorithm.name.encode('ascii')
)
self.openssl_assert(evp_md != self._ffi.NULL)
# Create an empty certificate.
x509_cert = self._lib.X509_new()
x509_cert = self._ffi.gc(x509_cert, backend._lib.X509_free)
# Set the x509 version.
res = self._lib.X509_set_version(x509_cert, builder._version.value)
self.openssl_assert(res == 1)
# Set the subject's name.
res = self._lib.X509_set_subject_name(
x509_cert, _encode_name_gc(self, builder._subject_name)
)
self.openssl_assert(res == 1)
# Set the subject's public key.
res = self._lib.X509_set_pubkey(
x509_cert, builder._public_key._evp_pkey
)
self.openssl_assert(res == 1)
# Set the certificate serial number.
serial_number = _encode_asn1_int_gc(self, builder._serial_number)
res = self._lib.X509_set_serialNumber(x509_cert, serial_number)
self.openssl_assert(res == 1)
# Set the "not before" time.
if isinstance(builder, ExtBuilder):
time_str = _format_asn1_time_str(builder._not_valid_before, builder._not_valid_before_format)
else:
time_str = _format_asn1_time_str(builder._not_valid_before)
res = self._lib.ASN1_TIME_set_string(
self._lib.X509_get_notBefore(x509_cert),
time_str
)
if res == self._ffi.NULL:
self._raise_time_set_error()
# Set the "not after" time.
if isinstance(builder, ExtBuilder):
time_str = _format_asn1_time_str(builder._not_valid_after, builder._not_valid_after_format)
else:
time_str = _format_asn1_time_str(builder._not_valid_after)
res = self._lib.ASN1_TIME_set_string(
self._lib.X509_get_notAfter(x509_cert),
time_str
)
if res == self._ffi.NULL:
self._raise_time_set_error()
# Add extensions.
self._create_x509_extensions(
extensions=builder._extensions,
handlers=_EXTENSION_ENCODE_HANDLERS,
x509_obj=x509_cert,
add_func=self._lib.X509_add_ext,
gc=True
)
# Set the issuer name.
res = self._lib.X509_set_issuer_name(
x509_cert, _encode_name_gc(self, builder._issuer_name)
)
self.openssl_assert(res == 1)
# Sign the certificate with the issuer's private key.
res = self._lib.X509_sign(
x509_cert, private_key._evp_pkey, evp_md
)
if res == 0:
errors = self._consume_errors()
self.openssl_assert(
errors[0]._lib_reason_match(
self._lib.ERR_LIB_RSA,
self._lib.RSA_R_DIGEST_TOO_BIG_FOR_RSA_KEY
)
)
raise ValueError("Digest too big for RSA key")
return _Certificate(self, x509_cert)
