From d3a9ae35fb63cb2d8372a352da26e53a9009edfb Mon Sep 17 00:00:00 2001
From: Russ Housley <housley@vigilsec.com>
Date: Mon, 7 Oct 2019 16:44:32 -0400
Subject: Add support for RFC 8017 (#76)

---
 pyasn1_modules/rfc8017.py | 153 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 153 insertions(+)
 create mode 100644 pyasn1_modules/rfc8017.py

(limited to 'pyasn1_modules')

diff --git a/pyasn1_modules/rfc8017.py b/pyasn1_modules/rfc8017.py
new file mode 100644
index 0000000..fefed1d
--- /dev/null
+++ b/pyasn1_modules/rfc8017.py
@@ -0,0 +1,153 @@
+#
+# 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
+#
+# PKCS #1: RSA Cryptography Specifications Version 2.2
+#
+# ASN.1 source from:
+# https://www.rfc-editor.org/rfc/rfc8017.txt
+#
+
+from pyasn1.type import constraint
+from pyasn1.type import namedtype
+from pyasn1.type import namedval
+from pyasn1.type import univ
+
+from pyasn1_modules import rfc2437
+from pyasn1_modules import rfc3447
+from pyasn1_modules import rfc4055
+from pyasn1_modules import rfc5280
+
+MAX = float('inf')
+
+
+# Import Algorithm Identifier from RFC 5280
+
+AlgorithmIdentifier = rfc5280.AlgorithmIdentifier
+
+class DigestAlgorithm(AlgorithmIdentifier):
+    pass
+
+class HashAlgorithm(AlgorithmIdentifier):
+    pass
+
+class MaskGenAlgorithm(AlgorithmIdentifier):
+    pass
+
+class PSourceAlgorithm(AlgorithmIdentifier):
+    pass
+
+
+# Object identifiers from NIST SHA2
+
+hashAlgs = univ.ObjectIdentifier('2.16.840.1.101.3.4.2')
+id_sha256 = rfc4055.id_sha256
+id_sha384 = rfc4055.id_sha384
+id_sha512 = rfc4055.id_sha512
+id_sha224 = rfc4055.id_sha224
+id_sha512_224 = hashAlgs + (5, )
+id_sha512_256 = hashAlgs + (6, )
+
+
+# Basic object identifiers
+
+pkcs_1 = univ.ObjectIdentifier('1.2.840.113549.1.1')
+rsaEncryption = rfc2437.rsaEncryption
+id_RSAES_OAEP = rfc2437.id_RSAES_OAEP
+id_pSpecified = rfc2437.id_pSpecified
+id_RSASSA_PSS = rfc4055.id_RSASSA_PSS
+md2WithRSAEncryption = rfc2437.md2WithRSAEncryption
+md5WithRSAEncryption = rfc2437.md5WithRSAEncryption
+sha1WithRSAEncryption = rfc2437.sha1WithRSAEncryption
+sha224WithRSAEncryption = rfc4055.sha224WithRSAEncryption
+sha256WithRSAEncryption = rfc4055.sha256WithRSAEncryption
+sha384WithRSAEncryption = rfc4055.sha384WithRSAEncryption
+sha512WithRSAEncryption = rfc4055.sha512WithRSAEncryption
+sha512_224WithRSAEncryption = pkcs_1 + (15, )
+sha512_256WithRSAEncryption = pkcs_1 + (16, )
+id_sha1 = rfc2437.id_sha1
+id_md2 = univ.ObjectIdentifier('1.2.840.113549.2.2')
+id_md5 = univ.ObjectIdentifier('1.2.840.113549.2.5')
+id_mgf1 = rfc2437.id_mgf1
+
+
+# Default parameter values
+
+sha1 = rfc4055.sha1Identifier
+SHA1Parameters = univ.Null("")
+
+mgf1SHA1 = rfc4055.mgf1SHA1Identifier
+
+class EncodingParameters(univ.OctetString):
+    subtypeSpec = constraint.ValueSizeConstraint(0, MAX)
+
+pSpecifiedEmpty = rfc4055.pSpecifiedEmptyIdentifier
+
+emptyString = EncodingParameters(value='')
+
+
+# Main structures
+
+class Version(univ.Integer):
+    namedValues = namedval.NamedValues(
+        ('two-prime', 0),
+        ('multi', 1)
+    )
+
+class TrailerField(univ.Integer):
+    namedValues = namedval.NamedValues(
+       ('trailerFieldBC', 1)
+    )
+
+RSAPublicKey = rfc2437.RSAPublicKey
+
+OtherPrimeInfo = rfc3447.OtherPrimeInfo
+OtherPrimeInfos = rfc3447.OtherPrimeInfos
+RSAPrivateKey = rfc3447.RSAPrivateKey
+
+RSAES_OAEP_params = rfc4055.RSAES_OAEP_params
+rSAES_OAEP_Default_Identifier = rfc4055.rSAES_OAEP_Default_Identifier
+
+RSASSA_PSS_params = rfc4055.RSASSA_PSS_params
+rSASSA_PSS_Default_Identifier = rfc4055.rSASSA_PSS_Default_Identifier
+
+
+# Syntax for the EMSA-PKCS1-v1_5 hash identifier
+
+class DigestInfo(univ.Sequence):
+    componentType = namedtype.NamedTypes(
+        namedtype.NamedType('digestAlgorithm', DigestAlgorithm()),
+        namedtype.NamedType('digest', univ.OctetString())
+    )
+
+
+# Update the Algorithm Identifier map
+
+_algorithmIdentifierMapUpdate = {
+    id_sha1: univ.Null(),
+    id_sha224: univ.Null(),
+    id_sha256: univ.Null(),
+    id_sha384: univ.Null(),
+    id_sha512: univ.Null(),
+    id_sha512_224: univ.Null(),
+    id_sha512_256: univ.Null(),
+    id_mgf1: AlgorithmIdentifier(),
+    id_pSpecified: univ.OctetString(),
+    id_RSAES_OAEP: RSAES_OAEP_params(),
+    id_RSASSA_PSS: RSASSA_PSS_params(),
+    md2WithRSAEncryption: univ.Null(),
+    md5WithRSAEncryption: univ.Null(),
+    sha1WithRSAEncryption: univ.Null(),
+    sha224WithRSAEncryption: univ.Null(),
+    sha256WithRSAEncryption: univ.Null(),
+    sha384WithRSAEncryption: univ.Null(),
+    sha512WithRSAEncryption: univ.Null(),
+    sha512_224WithRSAEncryption: univ.Null(),
+    sha512_256WithRSAEncryption: univ.Null(),
+}
+
+rfc5280.algorithmIdentifierMap.update(_algorithmIdentifierMapUpdate)
-- 
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