Add support for RFC 7191 (#44)

4 files changed, 438 insertions, 0 deletions

diff --git a/CHANGES.txt b/CHANGES.txt
index 3a7b723..03c1ba4 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -20,6 +20,8 @@ Revision 0.2.6, released XX-05-2019
 - Added RFC5940 providing CMS Revocation Information Choices
 - Added RFC7296 providing IKEv2 Certificate Bundle
 - Added RFC8619 providing HKDF Algorithm Identifiers
+- Added RFC7191 providing CMS Key Package Receipt and Error Content
+  Types
 
 Revision 0.2.5, released 24-04-2019
 -----------------------------------
diff --git a/pyasn1_modules/rfc7191.py b/pyasn1_modules/rfc7191.py
new file mode 100644
index 0000000..d3e2f85
--- /dev/null
+++ b/pyasn1_modules/rfc7191.py
@@ -0,0 +1,234 @@
+# This file is being contributed to of pyasn1-modules software.
+#
+# Created by Russ Housley without assistance from the asn1ate tool.
+# Copyright (c) 2018, Vigil Security, LLC
+# License: http://snmplabs.com/pyasn1/license.html
+#
+# CMS Key Package Receipt and Error Content Types
+#
+# ASN.1 source from:
+# https://www.rfc-editor.org/rfc/rfc7191.txt
+
+from pyasn1.type import constraint
+from pyasn1.type import namedtype
+from pyasn1.type import namedval
+from pyasn1.type import tag
+from pyasn1.type import univ
+
+from pyasn1_modules import rfc5280
+
+MAX = float('inf')
+
+DistinguishedName = rfc5280.DistinguishedName
+
+
+# SingleAttribute is the same as Attribute in RFC 5652, except that the
+# attrValues SET must have one and only one member
+
+class AttributeValue(univ.Any):
+    pass
+
+
+class AttributeValues(univ.SetOf):
+    pass
+
+AttributeValues.componentType = AttributeValue()
+AttributeValues.sizeSpec = univ.Set.sizeSpec + constraint.ValueSizeConstraint(1, 1)
+
+
+class SingleAttribute(univ.Sequence):
+    pass
+
+SingleAttribute.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('attrType', univ.ObjectIdentifier()),
+    namedtype.NamedType('attrValues', AttributeValues())
+)
+
+
+# SIR Entity Name
+
+class SIREntityNameType(univ.ObjectIdentifier):
+    pass
+
+
+class SIREntityNameValue(univ.Any):
+    pass
+
+
+class SIREntityName(univ.Sequence):
+    pass
+
+SIREntityName.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('sirenType', SIREntityNameType()),
+    namedtype.NamedType('sirenValue', univ.OctetString())
+    # CONTAINING the DER-encoded SIREntityNameValue
+)
+
+
+class SIREntityNames(univ.SequenceOf):
+    pass
+
+SIREntityNames.componentType = SIREntityName()
+SIREntityNames.subtypeSpec=constraint.ValueSizeConstraint(1, MAX)
+
+
+id_dn = univ.ObjectIdentifier('2.16.840.1.101.2.1.16.0')
+
+
+class siren_dn(SIREntityName):
+    def __init__(self):
+        SIREntityName.__init__(self)
+        self['sirenType'] = id_dn
+
+
+# Key Package Error CMS Content Type
+
+class EnumeratedErrorCode(univ.Enumerated):
+    pass
+
+# Error codes with values <= 33 are aligned with RFC 5934
+EnumeratedErrorCode.namedValues = namedval.NamedValues(
+    ('decodeFailure', 1),
+    ('badContentInfo', 2),
+    ('badSignedData', 3),
+    ('badEncapContent', 4),
+    ('badCertificate', 5),
+    ('badSignerInfo', 6),
+    ('badSignedAttrs', 7),
+    ('badUnsignedAttrs', 8),
+    ('missingContent', 9),
+    ('noTrustAnchor', 10),
+    ('notAuthorized', 11),
+    ('badDigestAlgorithm', 12),
+    ('badSignatureAlgorithm', 13),
+    ('unsupportedKeySize', 14),
+    ('unsupportedParameters', 15),
+    ('signatureFailure', 16),
+    ('insufficientMemory', 17),
+    ('incorrectTarget', 23),
+    ('missingSignature', 29),
+    ('resourcesBusy', 30),
+    ('versionNumberMismatch', 31),
+    ('revokedCertificate', 33),
+    ('ambiguousDecrypt', 60),
+    ('noDecryptKey', 61),
+    ('badEncryptedData', 62),
+    ('badEnvelopedData', 63),
+    ('badAuthenticatedData', 64),
+    ('badAuthEnvelopedData', 65),
+    ('badKeyAgreeRecipientInfo', 66),
+    ('badKEKRecipientInfo', 67),
+    ('badEncryptContent', 68),
+    ('badEncryptAlgorithm', 69),
+    ('missingCiphertext', 70),
+    ('decryptFailure', 71),
+    ('badMACAlgorithm', 72),
+    ('badAuthAttrs', 73),
+    ('badUnauthAttrs', 74),
+    ('invalidMAC', 75),
+    ('mismatchedDigestAlg', 76),
+    ('missingCertificate', 77),
+    ('tooManySigners', 78),
+    ('missingSignedAttributes', 79),
+    ('derEncodingNotUsed', 80),
+    ('missingContentHints', 81),
+    ('invalidAttributeLocation', 82),
+    ('badMessageDigest', 83),
+    ('badKeyPackage', 84),
+    ('badAttributes', 85),
+    ('attributeComparisonFailure', 86),
+    ('unsupportedSymmetricKeyPackage', 87),
+    ('unsupportedAsymmetricKeyPackage', 88),
+    ('constraintViolation', 89),
+    ('ambiguousDefaultValue', 90),
+    ('noMatchingRecipientInfo', 91),
+    ('unsupportedKeyWrapAlgorithm', 92),
+    ('badKeyTransRecipientInfo', 93),
+    ('other', 127)
+)
+
+
+class ErrorCodeChoice(univ.Choice):
+    pass
+
+ErrorCodeChoice.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('enum', EnumeratedErrorCode()),
+    namedtype.NamedType('oid', univ.ObjectIdentifier())
+)
+
+
+class KeyPkgID(univ.OctetString):
+    pass
+
+
+class KeyPkgIdentifier(univ.Choice):
+    pass
+
+KeyPkgIdentifier.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('pkgID', KeyPkgID()),
+    namedtype.NamedType('attribute', SingleAttribute())
+)
+
+
+class KeyPkgVersion(univ.Integer):
+    pass
+
+
+KeyPkgVersion.namedValues = namedval.NamedValues(
+    ('v1', 1),
+    ('v2', 2)
+)
+
+KeyPkgVersion.subtypeSpec = constraint.ValueRangeConstraint(1, 65535)
+
+
+id_ct_KP_keyPackageError = univ.ObjectIdentifier('2.16.840.1.101.2.1.2.78.6')
+
+class KeyPackageError(univ.Sequence):
+    pass
+
+KeyPackageError.componentType = namedtype.NamedTypes(
+    namedtype.DefaultedNamedType('version', KeyPkgVersion().subtype(value='v2')),
+    namedtype.OptionalNamedType('errorOf', KeyPkgIdentifier().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 0))),
+    namedtype.NamedType('errorBy', SIREntityName()),
+    namedtype.NamedType('errorCode', ErrorCodeChoice())
+)
+
+
+# Key Package Receipt CMS Content Type
+
+id_ct_KP_keyPackageReceipt = univ.ObjectIdentifier('2.16.840.1.101.2.1.2.78.3')
+
+class KeyPackageReceipt(univ.Sequence):
+    pass
+
+KeyPackageReceipt.componentType = namedtype.NamedTypes(
+    namedtype.DefaultedNamedType('version', KeyPkgVersion().subtype(value='v2')),
+    namedtype.NamedType('receiptOf', KeyPkgIdentifier()),
+    namedtype.NamedType('receivedBy', SIREntityName())
+)
+
+
+# Key Package Receipt Request Attribute
+
+class KeyPkgReceiptReq(univ.Sequence):
+    pass
+
+KeyPkgReceiptReq.componentType = namedtype.NamedTypes(
+    namedtype.DefaultedNamedType('encryptReceipt', univ.Boolean().subtype(value=0)),
+    namedtype.OptionalNamedType('receiptsFrom', SIREntityNames().subtype(
+        implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0))),
+    namedtype.NamedType('receiptsTo', SIREntityNames())
+)
+
+
+id_aa_KP_keyPkgIdAndReceiptReq = univ.ObjectIdentifier('2.16.840.1.101.2.1.5.65')
+
+class KeyPkgIdentifierAndReceiptReq(univ.Sequence):
+    pass
+
+KeyPkgIdentifierAndReceiptReq.componentType = namedtype.NamedTypes(
+    namedtype.NamedType('pkgID', KeyPkgID()),
+    namedtype.OptionalNamedType('receiptReq', KeyPkgReceiptReq())
+)
diff --git a/tests/__main__.py b/tests/__main__.py
index 101a2b2..879981e 100644
--- a/tests/__main__.py
+++ b/tests/__main__.py
@@ -40,6 +40,7 @@ suite = unittest.TestLoader().loadTestsFromNames(
      'tests.test_rfc5940.suite',
      'tests.test_rfc5958.suite',
      'tests.test_rfc6019.suite',
+     'tests.test_rfc7191.suite',
      'tests.test_rfc7296.suite',
      'tests.test_rfc8103.suite',
      'tests.test_rfc8226.suite',
diff --git a/tests/test_rfc7191.py b/tests/test_rfc7191.py
new file mode 100755
index 0000000..664ead7
--- /dev/null
+++ b/tests/test_rfc7191.py
@@ -0,0 +1,201 @@
+#
+# This file is part of pyasn1-modules software.
+#
+# Created by Russ Housley
+# Copyright (c) 2019, Vigil Security, LLC
+# License: http://snmplabs.com/pyasn1/license.html
+#
+
+import sys
+
+from pyasn1.codec.der.decoder import decode as der_decode
+from pyasn1.codec.der.encoder import encode as der_encode
+
+from pyasn1_modules import pem
+from pyasn1_modules import rfc5652
+from pyasn1_modules import rfc7191
+
+try:
+    import unittest2 as unittest
+except ImportError:
+    import unittest
+
+
+class ReceiptRequestTestCase(unittest.TestCase):
+    message1_pem_text = """\
+MIIGfAYJKoZIhvcNAQcCoIIGbTCCBmkCAQMxDTALBglghkgBZQMEAgIwgb4GCyqGSIb3DQEJ
+EAEZoIGuBIGrMIGooEQwIwYLKoZIhvcNAQkQDAExFAwSVmlnaWwgU2VjdXJpdHkgTExDMB0G
+CyqGSIb3DQEJEAwDMQ4MDFByZXRlbmQgMDQ4QTBgMF4wVjAbBgsqhkiG9w0BCRAMGzEMDApl
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+PQQDAzA/MQswCQYDVQQGEwJVUzELMAkGA1UECAwCVkExEDAOBgNVBAcMB0hlcm5kb24xETAP
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+gY4wgYsGCWCGSAFlAgEQAAR+MHwxCzAJBgNVBAYTAlVTMQswCQYDVQQIEwJWQTEQMA4GA1UE
+BxMHSGVybmRvbjEbMBkGA1UEChMSVmlnaWwgU2VjdXJpdHkgTExDMRcwFQYDVQQLEw5LZXkg
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+Z7DXliUb8FDKs+BadyCY+IJobPnQ6UoLldMj3pKEowONPifqrbWBJJ5cQQNgW6YuAjBbjSlY
+goRV+bq4fdgOOj25JFqa80xnXGtQqjm/7NSII5SbdJk+DT7KCkSbkElkbgQ=
+"""
+
+    def setUp(self):
+        self.asn1Spec = rfc5652.ContentInfo()
+
+    def testDerCodec(self):
+        substrate = pem.readBase64fromText(self.message1_pem_text)
+        asn1Object, rest = der_decode (substrate, asn1Spec=self.asn1Spec)
+        assert not rest
+        assert asn1Object.prettyPrint()
+        assert der_encode(asn1Object) == substrate
+
+        assert asn1Object['contentType'] == rfc5652.id_signedData
+        sd, rest = der_decode (asn1Object['content'], 
+            asn1Spec=rfc5652.SignedData())
+
+        for sa in sd['signerInfos'][0]['signedAttrs']:
+            sat = sa['attrType']
+            sav0 = sa['attrValues'][0]
+
+            if sat == rfc7191.id_aa_KP_keyPkgIdAndReceiptReq:
+                sav, rest = der_decode(sav0, 
+                    asn1Spec=rfc7191.KeyPkgIdentifierAndReceiptReq())
+                assert not rest
+                assert sav.prettyPrint()
+                assert der_encode(sav) == sav0
+
+
+class ReceiptTestCase(unittest.TestCase):
+    message2_pem_text = """\
+MIIEdAYJKoZIhvcNAQcCoIIEZTCCBGECAQMxDTALBglghkgBZQMEAgIwgawGCmCGSAFlAgEC
+TgOggZ0EgZowgZcEFCe4nFY7FiJRnReHHHm/rIht3/g9MH8GCWCGSAFlAgEQAARyMHAxCzAJ
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+CQQxMgQwQSWYpq4jwhMkmS0as0JL3gjYxKLgDfzP2ndTNsAY0m9p8Igp8ZcK4+5n9fXJ43vU
+MAoGCCqGSM49BAMDBGgwZgIxAMfq2EJ5pSl9tGOEVJEgZitc266ljrOg5GDjkd2d089qw1A3
+bUcOYuCdivgxVuhlAgIxAPR9JavxziwCbVyBUWOAiKKYfglTgG3AwNmrKDj0NtXUQ9qDmGAc
+6L+EAY2P5OVB8Q==
+"""
+
+    def setUp(self):
+        self.asn1Spec = rfc5652.ContentInfo()
+
+    def testDerCodec(self):
+        substrate = pem.readBase64fromText(self.message2_pem_text)
+        asn1Object, rest = der_decode (substrate, asn1Spec=self.asn1Spec)
+        assert not rest
+        assert asn1Object.prettyPrint()
+        assert der_encode(asn1Object) == substrate
+
+        assert asn1Object['contentType'] == rfc5652.id_signedData
+        sd, rest = der_decode (asn1Object['content'],
+            asn1Spec=rfc5652.SignedData())
+        assert not rest
+        assert sd.prettyPrint()
+        assert der_encode(sd) == asn1Object['content']
+
+        oid = sd['encapContentInfo']['eContentType']
+        assert oid == rfc7191.id_ct_KP_keyPackageReceipt
+        receipt, rest = der_decode(sd['encapContentInfo']['eContent'],
+            asn1Spec=rfc7191.KeyPackageReceipt())
+        assert not rest
+        assert receipt.prettyPrint()
+        assert der_encode(receipt) == sd['encapContentInfo']['eContent']
+
+        package_id_pem_text = "J7icVjsWIlGdF4cceb+siG3f+D0="
+        package_id = pem.readBase64fromText(package_id_pem_text)
+        assert receipt['receiptOf']['pkgID'] == package_id
+
+
+class ErrorTestCase(unittest.TestCase):
+    message3_pem_text = """\
+MIIEbwYJKoZIhvcNAQcCoIIEYDCCBFwCAQMxDTALBglghkgBZQMEAgIwga0GCmCGSAFlAgEC
+TgaggZ4EgZswgZigFgQUJ7icVjsWIlGdF4cceb+siG3f+D0wewYJYIZIAWUCARAABG4wbDEL
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+0V6+BtY=
+"""
+
+    def setUp(self):
+        self.asn1Spec = rfc5652.ContentInfo()
+
+    def testDerCodec(self):
+        substrate = pem.readBase64fromText(self.message3_pem_text)
+        asn1Object, rest = der_decode (substrate, asn1Spec=self.asn1Spec)
+        assert not rest
+        assert asn1Object.prettyPrint()
+        assert der_encode(asn1Object) == substrate
+
+        assert asn1Object['contentType'] == rfc5652.id_signedData
+        sd, rest = der_decode (asn1Object['content'],
+            asn1Spec=rfc5652.SignedData())
+        assert not rest
+        assert sd.prettyPrint()
+        assert der_encode(sd) == asn1Object['content']
+
+        oid = sd['encapContentInfo']['eContentType']
+        assert oid == rfc7191.id_ct_KP_keyPackageError
+        kpe, rest = der_decode(sd['encapContentInfo']['eContent'],
+            asn1Spec=rfc7191.KeyPackageError())
+        assert not rest
+        assert kpe.prettyPrint()
+        assert der_encode(kpe) == sd['encapContentInfo']['eContent']
+
+        package_id_pem_text = "J7icVjsWIlGdF4cceb+siG3f+D0="
+        package_id = pem.readBase64fromText(package_id_pem_text)
+        assert kpe['errorOf']['pkgID'] == package_id
+        assert kpe['errorCode'] == rfc7191.EnumeratedErrorCode(value=10)
+
+
+suite = unittest.TestLoader().loadTestsFromModule(sys.modules[__name__])
+
+if __name__ == '__main__':
+    unittest.TextTestRunner(verbosity=2).run(suite)