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esp32_bluetooth_classic_sni.../libs/scapy/layers/x509.py

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initial commit todo: add documentation & wireshark dissector
2021-08-31 11:51:03 +00:00
# This file is part of Scapy
# See http://www.secdev.org/projects/scapy for more information
# Copyright (C) Philippe Biondi <phil@secdev.org>
# Enhanced by Maxence Tury <maxence.tury@ssi.gouv.fr>
# This program is published under a GPLv2 license
"""
X.509 certificates.
"""
from scapy.asn1.mib import conf # loads conf.mib
from scapy.asn1.asn1 import ASN1_Codecs, ASN1_OID, \
ASN1_IA5_STRING, ASN1_NULL, ASN1_PRINTABLE_STRING, \
ASN1_UTC_TIME, ASN1_UTF8_STRING
from scapy.asn1.ber import BER_tagging_dec, BER_Decoding_Error
from scapy.asn1packet import ASN1_Packet
from scapy.asn1fields import ASN1F_BIT_STRING, ASN1F_BIT_STRING_ENCAPS, \
ASN1F_BMP_STRING, ASN1F_BOOLEAN, ASN1F_CHOICE, ASN1F_ENUMERATED, \
ASN1F_FLAGS, ASN1F_GENERALIZED_TIME, ASN1F_IA5_STRING, ASN1F_INTEGER, \
ASN1F_ISO646_STRING, ASN1F_NULL, ASN1F_OID, ASN1F_PACKET, \
ASN1F_PRINTABLE_STRING, ASN1F_SEQUENCE, ASN1F_SEQUENCE_OF, ASN1F_SET_OF, \
ASN1F_STRING, ASN1F_T61_STRING, ASN1F_UNIVERSAL_STRING, ASN1F_UTC_TIME, \
ASN1F_UTF8_STRING, ASN1F_badsequence, ASN1F_enum_INTEGER, ASN1F_field, \
ASN1F_optional
from scapy.packet import Packet
from scapy.fields import PacketField
from scapy.volatile import ZuluTime, GeneralizedTime
from scapy.compat import plain_str
class ASN1P_OID(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_OID("oid", "0")
class ASN1P_INTEGER(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_INTEGER("number", 0)
class ASN1P_PRIVSEQ(ASN1_Packet):
# This class gets used in x509.uts
# It showcases the private high-tag decoding capacities of scapy.
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_IA5_STRING("str", ""),
ASN1F_STRING("int", 0),
explicit_tag=0,
flexible_tag=True)
#######################
# RSA packets #
#######################
# based on RFC 3447
# It could be interesting to use os.urandom and try to generate
# a new modulus each time RSAPublicKey is called with default values.
# (We might have to dig into scapy field initialization mechanisms...)
# NEVER rely on the key below, which is provided only for debugging purposes.
class RSAPublicKey(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_INTEGER("modulus", 10),
ASN1F_INTEGER("publicExponent", 3))
class RSAOtherPrimeInfo(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_INTEGER("prime", 0),
ASN1F_INTEGER("exponent", 0),
ASN1F_INTEGER("coefficient", 0))
class RSAPrivateKey(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_enum_INTEGER("version", 0, ["two-prime", "multi"]),
ASN1F_INTEGER("modulus", 10),
ASN1F_INTEGER("publicExponent", 3),
ASN1F_INTEGER("privateExponent", 3),
ASN1F_INTEGER("prime1", 2),
ASN1F_INTEGER("prime2", 5),
ASN1F_INTEGER("exponent1", 0),
ASN1F_INTEGER("exponent2", 3),
ASN1F_INTEGER("coefficient", 1),
ASN1F_optional(
ASN1F_SEQUENCE_OF("otherPrimeInfos", None,
RSAOtherPrimeInfo)))
####################################
# ECDSA packets #
####################################
# based on RFC 3279 & 5480 & 5915
class ECFieldID(ASN1_Packet):
# No characteristic-two-field support for now.
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_OID("fieldType", "prime-field"),
ASN1F_INTEGER("prime", 0))
class ECCurve(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_STRING("a", ""),
ASN1F_STRING("b", ""),
ASN1F_optional(
ASN1F_BIT_STRING("seed", None)))
class ECSpecifiedDomain(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_enum_INTEGER("version", 1, {1: "ecpVer1"}),
ASN1F_PACKET("fieldID", ECFieldID(), ECFieldID),
ASN1F_PACKET("curve", ECCurve(), ECCurve),
ASN1F_STRING("base", ""),
ASN1F_INTEGER("order", 0),
ASN1F_optional(
ASN1F_INTEGER("cofactor", None)))
class ECParameters(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_CHOICE("curve", ASN1_OID("ansip384r1"),
ASN1F_OID, # for named curves
ASN1F_NULL, # for implicit curves
ECSpecifiedDomain)
class ECDSAPublicKey(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_BIT_STRING("ecPoint", "")
class ECDSAPrivateKey(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_enum_INTEGER("version", 1, {1: "ecPrivkeyVer1"}),
ASN1F_STRING("privateKey", ""),
ASN1F_optional(
ASN1F_PACKET("parameters", None, ECParameters,
explicit_tag=0xa0)),
ASN1F_optional(
ASN1F_PACKET("publicKey", None,
ECDSAPublicKey,
explicit_tag=0xa1)))
class ECDSASignature(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_INTEGER("r", 0),
ASN1F_INTEGER("s", 0))
######################
# X509 packets #
######################
# based on RFC 5280
# Names #
class ASN1F_X509_DirectoryString(ASN1F_CHOICE):
# we include ASN1 bit strings for rare instances of x500 addresses
def __init__(self, name, default, **kwargs):
ASN1F_CHOICE.__init__(self, name, default,
ASN1F_PRINTABLE_STRING, ASN1F_UTF8_STRING,
ASN1F_IA5_STRING, ASN1F_T61_STRING,
ASN1F_UNIVERSAL_STRING, ASN1F_BIT_STRING,
**kwargs)
class X509_AttributeValue(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_CHOICE("value", ASN1_PRINTABLE_STRING("FR"),
ASN1F_PRINTABLE_STRING, ASN1F_UTF8_STRING,
ASN1F_IA5_STRING, ASN1F_T61_STRING,
ASN1F_UNIVERSAL_STRING)
class X509_Attribute(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_OID("type", "2.5.4.6"),
ASN1F_SET_OF("values",
[X509_AttributeValue()],
X509_AttributeValue))
class X509_AttributeTypeAndValue(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_OID("type", "2.5.4.6"),
ASN1F_X509_DirectoryString("value",
ASN1_PRINTABLE_STRING("FR")))
class X509_RDN(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SET_OF("rdn", [X509_AttributeTypeAndValue()],
X509_AttributeTypeAndValue)
class X509_OtherName(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_OID("type_id", "0"),
ASN1F_CHOICE("value", None,
ASN1F_IA5_STRING, ASN1F_ISO646_STRING,
ASN1F_BMP_STRING, ASN1F_UTF8_STRING,
explicit_tag=0xa0))
class X509_RFC822Name(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_IA5_STRING("rfc822Name", "")
class X509_DNSName(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_IA5_STRING("dNSName", "")
# XXX write me
class X509_X400Address(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_field("x400Address", "")
_default_directoryName = [
X509_RDN(),
X509_RDN(
rdn=[X509_AttributeTypeAndValue(
type="2.5.4.10",
value=ASN1_PRINTABLE_STRING("Scapy, Inc."))]),
X509_RDN(
rdn=[X509_AttributeTypeAndValue(
type="2.5.4.3",
value=ASN1_PRINTABLE_STRING("Scapy Default Name"))])
]
class X509_DirectoryName(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE_OF("directoryName", _default_directoryName,
X509_RDN)
class X509_EDIPartyName(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_optional(
ASN1F_X509_DirectoryString("nameAssigner", None,
explicit_tag=0xa0)),
ASN1F_X509_DirectoryString("partyName", None,
explicit_tag=0xa1))
class X509_URI(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_IA5_STRING("uniformResourceIdentifier", "")
class X509_IPAddress(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_STRING("iPAddress", "")
class X509_RegisteredID(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_OID("registeredID", "")
class X509_GeneralName(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_CHOICE("generalName", X509_DirectoryName(),
ASN1F_PACKET("otherName", None, X509_OtherName,
implicit_tag=0xa0),
ASN1F_PACKET("rfc822Name", None, X509_RFC822Name,
implicit_tag=0x81),
ASN1F_PACKET("dNSName", None, X509_DNSName,
implicit_tag=0x82),
ASN1F_PACKET("x400Address", None, X509_X400Address, # noqa: E501
explicit_tag=0xa3),
ASN1F_PACKET("directoryName", None, X509_DirectoryName, # noqa: E501
explicit_tag=0xa4),
ASN1F_PACKET("ediPartyName", None, X509_EDIPartyName, # noqa: E501
explicit_tag=0xa5),
ASN1F_PACKET("uniformResourceIdentifier", None, X509_URI, # noqa: E501
implicit_tag=0x86),
ASN1F_PACKET("ipAddress", None, X509_IPAddress,
implicit_tag=0x87),
ASN1F_PACKET("registeredID", None, X509_RegisteredID, # noqa: E501
implicit_tag=0x88))
# Extensions #
class X509_ExtAuthorityKeyIdentifier(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_optional(
ASN1F_STRING("keyIdentifier", b"\xff" * 20,
implicit_tag=0x80)),
ASN1F_optional(
ASN1F_SEQUENCE_OF("authorityCertIssuer", None,
X509_GeneralName,
implicit_tag=0xa1)),
ASN1F_optional(
ASN1F_INTEGER("authorityCertSerialNumber", None,
implicit_tag=0x82)))
class X509_ExtSubjectDirectoryAttributes(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE_OF("subjectDirectoryAttributes",
[X509_Attribute()],
X509_Attribute)
class X509_ExtSubjectKeyIdentifier(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_STRING("keyIdentifier", "xff" * 20)
class X509_ExtFullName(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE_OF("fullName", [X509_GeneralName()],
X509_GeneralName, implicit_tag=0xa0)
class X509_ExtNameRelativeToCRLIssuer(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_PACKET("nameRelativeToCRLIssuer", X509_RDN(), X509_RDN,
implicit_tag=0xa1)
class X509_ExtDistributionPointName(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_CHOICE("distributionPointName", None,
X509_ExtFullName, X509_ExtNameRelativeToCRLIssuer)
_reasons_mapping = ["unused",
"keyCompromise",
"cACompromise",
"affiliationChanged",
"superseded",
"cessationOfOperation",
"certificateHold",
"privilegeWithdrawn",
"aACompromise"]
class X509_ExtDistributionPoint(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_optional(
ASN1F_PACKET("distributionPoint",
X509_ExtDistributionPointName(),
X509_ExtDistributionPointName,
explicit_tag=0xa0)),
ASN1F_optional(
ASN1F_FLAGS("reasons", None, _reasons_mapping,
implicit_tag=0x81)),
ASN1F_optional(
ASN1F_SEQUENCE_OF("cRLIssuer", None,
X509_GeneralName,
implicit_tag=0xa2)))
_ku_mapping = ["digitalSignature",
"nonRepudiation",
"keyEncipherment",
"dataEncipherment",
"keyAgreement",
"keyCertSign",
"cRLSign",
"encipherOnly",
"decipherOnly"]
class X509_ExtKeyUsage(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_FLAGS("keyUsage", "101", _ku_mapping)
def get_keyUsage(self):
return self.ASN1_root.get_flags(self)
class X509_ExtPrivateKeyUsagePeriod(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_optional(
ASN1F_GENERALIZED_TIME("notBefore",
str(GeneralizedTime(-600)),
implicit_tag=0x80)),
ASN1F_optional(
ASN1F_GENERALIZED_TIME("notAfter",
str(GeneralizedTime(+86400)),
implicit_tag=0x81)))
class X509_PolicyMapping(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_OID("issuerDomainPolicy", None),
ASN1F_OID("subjectDomainPolicy", None))
class X509_ExtPolicyMappings(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE_OF("policyMappings", [], X509_PolicyMapping)
class X509_ExtBasicConstraints(ASN1_Packet):
# The cA field should not be optional, but some certs omit it for False.
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_optional(
ASN1F_BOOLEAN("cA", False)),
ASN1F_optional(
ASN1F_INTEGER("pathLenConstraint", None)))
class X509_ExtCRLNumber(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_INTEGER("cRLNumber", 0)
_cRL_reasons = ["unspecified",
"keyCompromise",
"cACompromise",
"affiliationChanged",
"superseded",
"cessationOfOperation",
"certificateHold",
"unused_reasonCode",
"removeFromCRL",
"privilegeWithdrawn",
"aACompromise"]
class X509_ExtReasonCode(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_ENUMERATED("cRLReason", 0, _cRL_reasons)
class X509_ExtDeltaCRLIndicator(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_INTEGER("deltaCRLIndicator", 0)
class X509_ExtIssuingDistributionPoint(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_optional(
ASN1F_PACKET("distributionPoint",
X509_ExtDistributionPointName(),
X509_ExtDistributionPointName,
explicit_tag=0xa0)),
ASN1F_BOOLEAN("onlyContainsUserCerts", False,
implicit_tag=0x81),
ASN1F_BOOLEAN("onlyContainsCACerts", False,
implicit_tag=0x82),
ASN1F_optional(
ASN1F_FLAGS("onlySomeReasons", None,
_reasons_mapping,
implicit_tag=0x83)),
ASN1F_BOOLEAN("indirectCRL", False,
implicit_tag=0x84),
ASN1F_BOOLEAN("onlyContainsAttributeCerts", False,
implicit_tag=0x85))
class X509_ExtCertificateIssuer(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE_OF("certificateIssuer", [], X509_GeneralName)
class X509_ExtInvalidityDate(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_GENERALIZED_TIME("invalidityDate", str(ZuluTime(+86400)))
class X509_ExtSubjectAltName(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE_OF("subjectAltName", [], X509_GeneralName)
class X509_ExtIssuerAltName(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE_OF("issuerAltName", [], X509_GeneralName)
class X509_ExtGeneralSubtree(ASN1_Packet):
# 'minimum' is not optional in RFC 5280, yet it is in some implementations.
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_PACKET("base", X509_GeneralName(), X509_GeneralName),
ASN1F_optional(
ASN1F_INTEGER("minimum", None, implicit_tag=0x80)),
ASN1F_optional(
ASN1F_INTEGER("maximum", None, implicit_tag=0x81)))
class X509_ExtNameConstraints(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_optional(
ASN1F_SEQUENCE_OF("permittedSubtrees", None,
X509_ExtGeneralSubtree,
implicit_tag=0xa0)),
ASN1F_optional(
ASN1F_SEQUENCE_OF("excludedSubtrees", None,
X509_ExtGeneralSubtree,
implicit_tag=0xa1)))
class X509_ExtPolicyConstraints(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_optional(
ASN1F_INTEGER("requireExplicitPolicy", None,
implicit_tag=0x80)),
ASN1F_optional(
ASN1F_INTEGER("inhibitPolicyMapping", None,
implicit_tag=0x81)))
class X509_ExtExtendedKeyUsage(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE_OF("extendedKeyUsage", [], ASN1P_OID)
def get_extendedKeyUsage(self):
eku_array = self.extendedKeyUsage
return [eku.oid.oidname for eku in eku_array]
class X509_ExtNoticeReference(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_CHOICE("organization",
ASN1_UTF8_STRING("Dummy Organization"),
ASN1F_IA5_STRING, ASN1F_ISO646_STRING,
ASN1F_BMP_STRING, ASN1F_UTF8_STRING),
ASN1F_SEQUENCE_OF("noticeNumbers", [], ASN1P_INTEGER))
class X509_ExtUserNotice(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_optional(
ASN1F_PACKET("noticeRef", None,
X509_ExtNoticeReference)),
ASN1F_optional(
ASN1F_CHOICE("explicitText",
ASN1_UTF8_STRING("Dummy ExplicitText"),
ASN1F_IA5_STRING, ASN1F_ISO646_STRING,
ASN1F_BMP_STRING, ASN1F_UTF8_STRING)))
class X509_ExtPolicyQualifierInfo(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_OID("policyQualifierId", "1.3.6.1.5.5.7.2.1"),
ASN1F_CHOICE("qualifier", ASN1_IA5_STRING("cps_str"),
ASN1F_IA5_STRING, X509_ExtUserNotice))
class X509_ExtPolicyInformation(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_OID("policyIdentifier", "2.5.29.32.0"),
ASN1F_optional(
ASN1F_SEQUENCE_OF("policyQualifiers", None,
X509_ExtPolicyQualifierInfo)))
class X509_ExtCertificatePolicies(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE_OF("certificatePolicies",
[X509_ExtPolicyInformation()],
X509_ExtPolicyInformation)
class X509_ExtCRLDistributionPoints(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE_OF("cRLDistributionPoints",
[X509_ExtDistributionPoint()],
X509_ExtDistributionPoint)
class X509_ExtInhibitAnyPolicy(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_INTEGER("skipCerts", 0)
class X509_ExtFreshestCRL(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE_OF("cRLDistributionPoints",
[X509_ExtDistributionPoint()],
X509_ExtDistributionPoint)
class X509_AccessDescription(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_OID("accessMethod", "0"),
ASN1F_PACKET("accessLocation", X509_GeneralName(),
X509_GeneralName))
class X509_ExtAuthInfoAccess(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE_OF("authorityInfoAccess",
[X509_AccessDescription()],
X509_AccessDescription)
class X509_ExtQcStatement(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_OID("statementId", "0.4.0.1862.1.1"),
ASN1F_optional(
ASN1F_field("statementInfo", None)))
class X509_ExtQcStatements(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE_OF("qcStatements",
[X509_ExtQcStatement()],
X509_ExtQcStatement)
class X509_ExtSubjInfoAccess(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE_OF("subjectInfoAccess",
[X509_AccessDescription()],
X509_AccessDescription)
class X509_ExtNetscapeCertType(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_BIT_STRING("netscapeCertType", "")
class X509_ExtComment(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_CHOICE("comment",
ASN1_UTF8_STRING("Dummy comment."),
ASN1F_IA5_STRING, ASN1F_ISO646_STRING,
ASN1F_BMP_STRING, ASN1F_UTF8_STRING)
class X509_ExtDefault(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_field("value", None)
# oid-info.com shows that some extensions share multiple OIDs.
# Here we only reproduce those written in RFC5280.
_ext_mapping = {
"2.5.29.9": X509_ExtSubjectDirectoryAttributes,
"2.5.29.14": X509_ExtSubjectKeyIdentifier,
"2.5.29.15": X509_ExtKeyUsage,
"2.5.29.16": X509_ExtPrivateKeyUsagePeriod,
"2.5.29.17": X509_ExtSubjectAltName,
"2.5.29.18": X509_ExtIssuerAltName,
"2.5.29.19": X509_ExtBasicConstraints,
"2.5.29.20": X509_ExtCRLNumber,
"2.5.29.21": X509_ExtReasonCode,
"2.5.29.24": X509_ExtInvalidityDate,
"2.5.29.27": X509_ExtDeltaCRLIndicator,
"2.5.29.28": X509_ExtIssuingDistributionPoint,
"2.5.29.29": X509_ExtCertificateIssuer,
"2.5.29.30": X509_ExtNameConstraints,
"2.5.29.31": X509_ExtCRLDistributionPoints,
"2.5.29.32": X509_ExtCertificatePolicies,
"2.5.29.33": X509_ExtPolicyMappings,
"2.5.29.35": X509_ExtAuthorityKeyIdentifier,
"2.5.29.36": X509_ExtPolicyConstraints,
"2.5.29.37": X509_ExtExtendedKeyUsage,
"2.5.29.46": X509_ExtFreshestCRL,
"2.5.29.54": X509_ExtInhibitAnyPolicy,
"2.16.840.1.113730.1.1": X509_ExtNetscapeCertType,
"2.16.840.1.113730.1.13": X509_ExtComment,
"1.3.6.1.5.5.7.1.1": X509_ExtAuthInfoAccess,
"1.3.6.1.5.5.7.1.3": X509_ExtQcStatements,
"1.3.6.1.5.5.7.1.11": X509_ExtSubjInfoAccess
}
class ASN1F_EXT_SEQUENCE(ASN1F_SEQUENCE):
# We use explicit_tag=0x04 with extnValue as STRING encapsulation.
def __init__(self, **kargs):
seq = [ASN1F_OID("extnID", "2.5.29.19"),
ASN1F_optional(
ASN1F_BOOLEAN("critical", False)),
ASN1F_PACKET("extnValue",
X509_ExtBasicConstraints(),
X509_ExtBasicConstraints,
explicit_tag=0x04)]
ASN1F_SEQUENCE.__init__(self, *seq, **kargs)
def dissect(self, pkt, s):
_, s = BER_tagging_dec(s, implicit_tag=self.implicit_tag,
explicit_tag=self.explicit_tag,
safe=self.flexible_tag)
codec = self.ASN1_tag.get_codec(pkt.ASN1_codec)
i, s, remain = codec.check_type_check_len(s)
extnID = self.seq[0]
critical = self.seq[1]
try:
oid, s = extnID.m2i(pkt, s)
extnID.set_val(pkt, oid)
s = critical.dissect(pkt, s)
encapsed = X509_ExtDefault
if oid.val in _ext_mapping:
encapsed = _ext_mapping[oid.val]
self.seq[2].cls = encapsed
self.seq[2].cls.ASN1_root.flexible_tag = True
# there are too many private extensions not to be flexible here
self.seq[2].default = encapsed()
s = self.seq[2].dissect(pkt, s)
if not self.flexible_tag and len(s) > 0:
err_msg = "extension sequence length issue"
raise BER_Decoding_Error(err_msg, remaining=s)
except ASN1F_badsequence:
raise Exception("could not parse extensions")
return remain
class X509_Extension(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_EXT_SEQUENCE()
class X509_Extensions(ASN1_Packet):
# we use this in OCSP status requests, in tls/handshake.py
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_optional(
ASN1F_SEQUENCE_OF("extensions",
None, X509_Extension))
# Public key wrapper #
class X509_AlgorithmIdentifier(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_OID("algorithm", "1.2.840.113549.1.1.11"),
ASN1F_optional(
ASN1F_CHOICE("parameters", ASN1_NULL(0),
ASN1F_NULL, ECParameters)))
class ASN1F_X509_SubjectPublicKeyInfoRSA(ASN1F_SEQUENCE):
def __init__(self, **kargs):
seq = [ASN1F_PACKET("signatureAlgorithm",
X509_AlgorithmIdentifier(),
X509_AlgorithmIdentifier),
ASN1F_BIT_STRING_ENCAPS("subjectPublicKey",
RSAPublicKey(),
RSAPublicKey)]
ASN1F_SEQUENCE.__init__(self, *seq, **kargs)
class ASN1F_X509_SubjectPublicKeyInfoECDSA(ASN1F_SEQUENCE):
def __init__(self, **kargs):
seq = [ASN1F_PACKET("signatureAlgorithm",
X509_AlgorithmIdentifier(),
X509_AlgorithmIdentifier),
ASN1F_PACKET("subjectPublicKey", ECDSAPublicKey(),
ECDSAPublicKey)]
ASN1F_SEQUENCE.__init__(self, *seq, **kargs)
class ASN1F_X509_SubjectPublicKeyInfo(ASN1F_SEQUENCE):
def __init__(self, **kargs):
seq = [ASN1F_PACKET("signatureAlgorithm",
X509_AlgorithmIdentifier(),
X509_AlgorithmIdentifier),
ASN1F_BIT_STRING("subjectPublicKey", None)]
ASN1F_SEQUENCE.__init__(self, *seq, **kargs)
def m2i(self, pkt, x):
c, s = ASN1F_SEQUENCE.m2i(self, pkt, x)
keytype = pkt.fields["signatureAlgorithm"].algorithm.oidname
if "rsa" in keytype.lower():
return ASN1F_X509_SubjectPublicKeyInfoRSA().m2i(pkt, x)
elif keytype == "ecPublicKey":
return ASN1F_X509_SubjectPublicKeyInfoECDSA().m2i(pkt, x)
else:
raise Exception("could not parse subjectPublicKeyInfo")
def dissect(self, pkt, s):
c, x = self.m2i(pkt, s)
return x
def build(self, pkt):
if "signatureAlgorithm" in pkt.fields:
ktype = pkt.fields['signatureAlgorithm'].algorithm.oidname
else:
ktype = pkt.default_fields["signatureAlgorithm"].algorithm.oidname
if "rsa" in ktype.lower():
pkt.default_fields["subjectPublicKey"] = RSAPublicKey()
return ASN1F_X509_SubjectPublicKeyInfoRSA().build(pkt)
elif ktype == "ecPublicKey":
pkt.default_fields["subjectPublicKey"] = ECDSAPublicKey()
return ASN1F_X509_SubjectPublicKeyInfoECDSA().build(pkt)
else:
raise Exception("could not build subjectPublicKeyInfo")
class X509_SubjectPublicKeyInfo(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_X509_SubjectPublicKeyInfo()
# OpenSSL compatibility wrappers #
# XXX As ECDSAPrivateKey already uses the structure from RFC 5958,
# and as we would prefer encapsulated RSA private keys to be parsed,
# this lazy implementation actually supports RSA encoding only.
# We'd rather call it RSAPrivateKey_OpenSSL than X509_PrivateKeyInfo.
class RSAPrivateKey_OpenSSL(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_enum_INTEGER("version", 0, ["v1", "v2"]),
ASN1F_PACKET("privateKeyAlgorithm",
X509_AlgorithmIdentifier(),
X509_AlgorithmIdentifier),
ASN1F_PACKET("privateKey",
RSAPrivateKey(),
RSAPrivateKey,
explicit_tag=0x04),
ASN1F_optional(
ASN1F_PACKET("parameters", None, ECParameters,
explicit_tag=0xa0)),
ASN1F_optional(
ASN1F_PACKET("publicKey", None,
ECDSAPublicKey,
explicit_tag=0xa1)))
# We need this hack because ECParameters parsing below must return
# a Padding payload, and making the ASN1_Packet class have Padding
# instead of Raw payload would break things...
class _PacketFieldRaw(PacketField):
def getfield(self, pkt, s):
i = self.m2i(pkt, s)
remain = ""
if conf.raw_layer in i:
r = i[conf.raw_layer]
del(r.underlayer.payload)
remain = r.load
return remain, i
class ECDSAPrivateKey_OpenSSL(Packet):
name = "ECDSA Params + Private Key"
fields_desc = [_PacketFieldRaw("ecparam",
ECParameters(),
ECParameters),
PacketField("privateKey",
ECDSAPrivateKey(),
ECDSAPrivateKey)]
# TBSCertificate & Certificate #
_default_issuer = [
X509_RDN(),
X509_RDN(
rdn=[X509_AttributeTypeAndValue(
type="2.5.4.10",
value=ASN1_PRINTABLE_STRING("Scapy, Inc."))]),
X509_RDN(
rdn=[X509_AttributeTypeAndValue(
type="2.5.4.3",
value=ASN1_PRINTABLE_STRING("Scapy Default Issuer"))])
]
_default_subject = [
X509_RDN(),
X509_RDN(
rdn=[X509_AttributeTypeAndValue(
type="2.5.4.10",
value=ASN1_PRINTABLE_STRING("Scapy, Inc."))]),
X509_RDN(
rdn=[X509_AttributeTypeAndValue(
type="2.5.4.3",
value=ASN1_PRINTABLE_STRING("Scapy Default Subject"))])
]
class X509_Validity(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_CHOICE("not_before",
ASN1_UTC_TIME(str(ZuluTime(-600))),
ASN1F_UTC_TIME, ASN1F_GENERALIZED_TIME),
ASN1F_CHOICE("not_after",
ASN1_UTC_TIME(str(ZuluTime(+86400))),
ASN1F_UTC_TIME, ASN1F_GENERALIZED_TIME))
_attrName_mapping = [
("countryName", "C"),
("stateOrProvinceName", "ST"),
("localityName", "L"),
("organizationName", "O"),
("organizationUnitName", "OU"),
("commonName", "CN")
]
_attrName_specials = [name for name, symbol in _attrName_mapping]
class X509_TBSCertificate(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_optional(
ASN1F_enum_INTEGER("version", 0x2, ["v1", "v2", "v3"],
explicit_tag=0xa0)),
ASN1F_INTEGER("serialNumber", 1),
ASN1F_PACKET("signature",
X509_AlgorithmIdentifier(),
X509_AlgorithmIdentifier),
ASN1F_SEQUENCE_OF("issuer", _default_issuer, X509_RDN),
ASN1F_PACKET("validity",
X509_Validity(),
X509_Validity),
ASN1F_SEQUENCE_OF("subject", _default_subject, X509_RDN),
ASN1F_PACKET("subjectPublicKeyInfo",
X509_SubjectPublicKeyInfo(),
X509_SubjectPublicKeyInfo),
ASN1F_optional(
ASN1F_BIT_STRING("issuerUniqueID", None,
implicit_tag=0x81)),
ASN1F_optional(
ASN1F_BIT_STRING("subjectUniqueID", None,
implicit_tag=0x82)),
ASN1F_optional(
ASN1F_SEQUENCE_OF("extensions",
[X509_Extension()],
X509_Extension,
explicit_tag=0xa3)))
def get_issuer(self):
attrs = self.issuer
attrsDict = {}
for attr in attrs:
# we assume there is only one name in each rdn ASN1_SET
attrsDict[attr.rdn[0].type.oidname] = plain_str(attr.rdn[0].value.val) # noqa: E501
return attrsDict
def get_issuer_str(self):
"""
Returns a one-line string containing every type/value
in a rather specific order. sorted() built-in ensures unicity.
"""
name_str = ""
attrsDict = self.get_issuer()
for attrType, attrSymbol in _attrName_mapping:
if attrType in attrsDict:
name_str += "/" + attrSymbol + "="
name_str += attrsDict[attrType]
for attrType in sorted(attrsDict):
if attrType not in _attrName_specials:
name_str += "/" + attrType + "="
name_str += attrsDict[attrType]
return name_str
def get_subject(self):
attrs = self.subject
attrsDict = {}
for attr in attrs:
# we assume there is only one name in each rdn ASN1_SET
attrsDict[attr.rdn[0].type.oidname] = plain_str(attr.rdn[0].value.val) # noqa: E501
return attrsDict
def get_subject_str(self):
name_str = ""
attrsDict = self.get_subject()
for attrType, attrSymbol in _attrName_mapping:
if attrType in attrsDict:
name_str += "/" + attrSymbol + "="
name_str += attrsDict[attrType]
for attrType in sorted(attrsDict):
if attrType not in _attrName_specials:
name_str += "/" + attrType + "="
name_str += attrsDict[attrType]
return name_str
class ASN1F_X509_CertECDSA(ASN1F_SEQUENCE):
def __init__(self, **kargs):
seq = [ASN1F_PACKET("tbsCertificate",
X509_TBSCertificate(),
X509_TBSCertificate),
ASN1F_PACKET("signatureAlgorithm",
X509_AlgorithmIdentifier(),
X509_AlgorithmIdentifier),
ASN1F_BIT_STRING_ENCAPS("signatureValue",
ECDSASignature(),
ECDSASignature)]
ASN1F_SEQUENCE.__init__(self, *seq, **kargs)
class ASN1F_X509_Cert(ASN1F_SEQUENCE):
def __init__(self, **kargs):
seq = [ASN1F_PACKET("tbsCertificate",
X509_TBSCertificate(),
X509_TBSCertificate),
ASN1F_PACKET("signatureAlgorithm",
X509_AlgorithmIdentifier(),
X509_AlgorithmIdentifier),
ASN1F_BIT_STRING("signatureValue",
"defaultsignature" * 2)]
ASN1F_SEQUENCE.__init__(self, *seq, **kargs)
def m2i(self, pkt, x):
c, s = ASN1F_SEQUENCE.m2i(self, pkt, x)
sigtype = pkt.fields["signatureAlgorithm"].algorithm.oidname
if "rsa" in sigtype.lower():
return c, s
elif "ecdsa" in sigtype.lower():
return ASN1F_X509_CertECDSA().m2i(pkt, x)
else:
raise Exception("could not parse certificate")
def dissect(self, pkt, s):
c, x = self.m2i(pkt, s)
return x
def build(self, pkt):
if "signatureAlgorithm" in pkt.fields:
sigtype = pkt.fields['signatureAlgorithm'].algorithm.oidname
else:
sigtype = pkt.default_fields["signatureAlgorithm"].algorithm.oidname # noqa: E501
if "rsa" in sigtype.lower():
return ASN1F_SEQUENCE.build(self, pkt)
elif "ecdsa" in sigtype.lower():
pkt.default_fields["signatureValue"] = ECDSASignature()
return ASN1F_X509_CertECDSA().build(pkt)
else:
raise Exception("could not build certificate")
class X509_Cert(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_X509_Cert()
# TBSCertList & CRL #
class X509_RevokedCertificate(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(ASN1F_INTEGER("serialNumber", 1),
ASN1F_UTC_TIME("revocationDate",
str(ZuluTime(+86400))),
ASN1F_optional(
ASN1F_SEQUENCE_OF("crlEntryExtensions",
None, X509_Extension)))
class X509_TBSCertList(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_optional(
ASN1F_enum_INTEGER("version", 1, ["v1", "v2"])),
ASN1F_PACKET("signature",
X509_AlgorithmIdentifier(),
X509_AlgorithmIdentifier),
ASN1F_SEQUENCE_OF("issuer", _default_issuer, X509_RDN),
ASN1F_UTC_TIME("this_update", str(ZuluTime(-1))),
ASN1F_optional(
ASN1F_UTC_TIME("next_update", None)),
ASN1F_optional(
ASN1F_SEQUENCE_OF("revokedCertificates", None,
X509_RevokedCertificate)),
ASN1F_optional(
ASN1F_SEQUENCE_OF("crlExtensions", None,
X509_Extension,
explicit_tag=0xa0)))
def get_issuer(self):
attrs = self.issuer
attrsDict = {}
for attr in attrs:
# we assume there is only one name in each rdn ASN1_SET
attrsDict[attr.rdn[0].type.oidname] = plain_str(attr.rdn[0].value.val) # noqa: E501
return attrsDict
def get_issuer_str(self):
"""
Returns a one-line string containing every type/value
in a rather specific order. sorted() built-in ensures unicity.
"""
name_str = ""
attrsDict = self.get_issuer()
for attrType, attrSymbol in _attrName_mapping:
if attrType in attrsDict:
name_str += "/" + attrSymbol + "="
name_str += attrsDict[attrType]
for attrType in sorted(attrsDict):
if attrType not in _attrName_specials:
name_str += "/" + attrType + "="
name_str += attrsDict[attrType]
return name_str
class ASN1F_X509_CRLECDSA(ASN1F_SEQUENCE):
def __init__(self, **kargs):
seq = [ASN1F_PACKET("tbsCertList",
X509_TBSCertList(),
X509_TBSCertList),
ASN1F_PACKET("signatureAlgorithm",
X509_AlgorithmIdentifier(),
X509_AlgorithmIdentifier),
ASN1F_BIT_STRING_ENCAPS("signatureValue",
ECDSASignature(),
ECDSASignature)]
ASN1F_SEQUENCE.__init__(self, *seq, **kargs)
class ASN1F_X509_CRL(ASN1F_SEQUENCE):
def __init__(self, **kargs):
seq = [ASN1F_PACKET("tbsCertList",
X509_TBSCertList(),
X509_TBSCertList),
ASN1F_PACKET("signatureAlgorithm",
X509_AlgorithmIdentifier(),
X509_AlgorithmIdentifier),
ASN1F_BIT_STRING("signatureValue",
"defaultsignature" * 2)]
ASN1F_SEQUENCE.__init__(self, *seq, **kargs)
def m2i(self, pkt, x):
c, s = ASN1F_SEQUENCE.m2i(self, pkt, x)
sigtype = pkt.fields["signatureAlgorithm"].algorithm.oidname
if "rsa" in sigtype.lower():
return c, s
elif "ecdsa" in sigtype.lower():
return ASN1F_X509_CRLECDSA().m2i(pkt, x)
else:
raise Exception("could not parse certificate")
def dissect(self, pkt, s):
c, x = self.m2i(pkt, s)
return x
def build(self, pkt):
if "signatureAlgorithm" in pkt.fields:
sigtype = pkt.fields['signatureAlgorithm'].algorithm.oidname
else:
sigtype = pkt.default_fields["signatureAlgorithm"].algorithm.oidname # noqa: E501
if "rsa" in sigtype.lower():
return ASN1F_SEQUENCE.build(self, pkt)
elif "ecdsa" in sigtype.lower():
pkt.default_fields["signatureValue"] = ECDSASignature()
return ASN1F_X509_CRLECDSA().build(pkt)
else:
raise Exception("could not build certificate")
class X509_CRL(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_X509_CRL()
#############################
# OCSP Status packets #
#############################
# based on RFC 6960
class OCSP_CertID(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_PACKET("hashAlgorithm",
X509_AlgorithmIdentifier(),
X509_AlgorithmIdentifier),
ASN1F_STRING("issuerNameHash", ""),
ASN1F_STRING("issuerKeyHash", ""),
ASN1F_INTEGER("serialNumber", 0))
class OCSP_GoodInfo(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_NULL("info", 0)
class OCSP_RevokedInfo(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_GENERALIZED_TIME("revocationTime", ""),
ASN1F_optional(
ASN1F_PACKET("revocationReason", None,
X509_ExtReasonCode,
explicit_tag=0x80)))
class OCSP_UnknownInfo(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_NULL("info", 0)
class OCSP_CertStatus(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_CHOICE("certStatus", None,
ASN1F_PACKET("good", OCSP_GoodInfo(),
OCSP_GoodInfo, implicit_tag=0x80),
ASN1F_PACKET("revoked", OCSP_RevokedInfo(),
OCSP_RevokedInfo, implicit_tag=0xa1),
ASN1F_PACKET("unknown", OCSP_UnknownInfo(),
OCSP_UnknownInfo, implicit_tag=0x82))
class OCSP_SingleResponse(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_PACKET("certID", OCSP_CertID(), OCSP_CertID),
ASN1F_PACKET("certStatus", OCSP_CertStatus(),
OCSP_CertStatus),
ASN1F_GENERALIZED_TIME("thisUpdate", ""),
ASN1F_optional(
ASN1F_GENERALIZED_TIME("nextUpdate", "",
explicit_tag=0xa0)),
ASN1F_optional(
ASN1F_SEQUENCE_OF("singleExtensions", None,
X509_Extension,
explicit_tag=0xa1)))
class OCSP_ByName(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE_OF("byName", [], X509_RDN)
class OCSP_ByKey(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_STRING("byKey", "")
class OCSP_ResponderID(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_CHOICE("responderID", None,
ASN1F_PACKET("byName", OCSP_ByName(), OCSP_ByName,
explicit_tag=0xa1),
ASN1F_PACKET("byKey", OCSP_ByKey(), OCSP_ByKey,
explicit_tag=0xa2))
class OCSP_ResponseData(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_optional(
ASN1F_enum_INTEGER("version", 0, {0: "v1"},
explicit_tag=0x80)),
ASN1F_PACKET("responderID", OCSP_ResponderID(),
OCSP_ResponderID),
ASN1F_GENERALIZED_TIME("producedAt",
str(GeneralizedTime())),
ASN1F_SEQUENCE_OF("responses", [], OCSP_SingleResponse),
ASN1F_optional(
ASN1F_SEQUENCE_OF("responseExtensions", None,
X509_Extension,
explicit_tag=0xa1)))
class ASN1F_OCSP_BasicResponseECDSA(ASN1F_SEQUENCE):
def __init__(self, **kargs):
seq = [ASN1F_PACKET("tbsResponseData",
OCSP_ResponseData(),
OCSP_ResponseData),
ASN1F_PACKET("signatureAlgorithm",
X509_AlgorithmIdentifier(),
X509_AlgorithmIdentifier),
ASN1F_BIT_STRING_ENCAPS("signature",
ECDSASignature(),
ECDSASignature),
ASN1F_optional(
ASN1F_SEQUENCE_OF("certs", None, X509_Cert,
explicit_tag=0xa0))]
ASN1F_SEQUENCE.__init__(self, *seq, **kargs)
class ASN1F_OCSP_BasicResponse(ASN1F_SEQUENCE):
def __init__(self, **kargs):
seq = [ASN1F_PACKET("tbsResponseData",
OCSP_ResponseData(),
OCSP_ResponseData),
ASN1F_PACKET("signatureAlgorithm",
X509_AlgorithmIdentifier(),
X509_AlgorithmIdentifier),
ASN1F_BIT_STRING("signature",
"defaultsignature" * 2),
ASN1F_optional(
ASN1F_SEQUENCE_OF("certs", None, X509_Cert,
explicit_tag=0xa0))]
ASN1F_SEQUENCE.__init__(self, *seq, **kargs)
def m2i(self, pkt, x):
c, s = ASN1F_SEQUENCE.m2i(self, pkt, x)
sigtype = pkt.fields["signatureAlgorithm"].algorithm.oidname
if "rsa" in sigtype.lower():
return c, s
elif "ecdsa" in sigtype.lower():
return ASN1F_OCSP_BasicResponseECDSA().m2i(pkt, x)
else:
raise Exception("could not parse OCSP basic response")
def dissect(self, pkt, s):
c, x = self.m2i(pkt, s)
return x
def build(self, pkt):
if "signatureAlgorithm" in pkt.fields:
sigtype = pkt.fields['signatureAlgorithm'].algorithm.oidname
else:
sigtype = pkt.default_fields["signatureAlgorithm"].algorithm.oidname # noqa: E501
if "rsa" in sigtype.lower():
return ASN1F_SEQUENCE.build(self, pkt)
elif "ecdsa" in sigtype.lower():
pkt.default_fields["signatureValue"] = ECDSASignature()
return ASN1F_OCSP_BasicResponseECDSA().build(pkt)
else:
raise Exception("could not build OCSP basic response")
class OCSP_ResponseBytes(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_OID("responseType", "1.3.6.1.5.5.7.48.1.1"),
ASN1F_OCSP_BasicResponse(explicit_tag=0x04))
_responseStatus_mapping = ["successful",
"malformedRequest",
"internalError",
"tryLater",
"notUsed",
"sigRequired",
"unauthorized"]
class OCSP_Response(ASN1_Packet):
ASN1_codec = ASN1_Codecs.BER
ASN1_root = ASN1F_SEQUENCE(
ASN1F_ENUMERATED("responseStatus", 0,
_responseStatus_mapping),
ASN1F_optional(
ASN1F_PACKET("responseBytes", None,
OCSP_ResponseBytes,
explicit_tag=0xa0)))
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