From 9884505885e342de141d1f4a3cc0be8dcd0c54b3 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Sybren=20A=2E=20St=C3=BCvel?= Date: Thu, 11 Oct 2012 17:09:13 +0200 Subject: Added support for loading public keys from OpenSSL --- rsa/asn1.py | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 rsa/asn1.py (limited to 'rsa/asn1.py') diff --git a/rsa/asn1.py b/rsa/asn1.py new file mode 100644 index 0000000..706e6cf --- /dev/null +++ b/rsa/asn1.py @@ -0,0 +1,35 @@ +'''ASN.1 definitions. + +Not all ASN.1-handling code use these definitions, but when it does, they should be here. +''' + +from pyasn1.type import univ, namedtype, tag + +class PubKeyHeader(univ.Sequence): + componentType = namedtype.NamedTypes( + namedtype.NamedType('oid', univ.ObjectIdentifier()), + namedtype.NamedType('parameters', univ.Null()), + ) + +class OpenSSLPubKey(univ.Sequence): + componentType = namedtype.NamedTypes( + namedtype.NamedType('header', PubKeyHeader()), + + # This little hack (the implicit tag) allows us to get a Bit String as Octet String + namedtype.NamedType('key', univ.OctetString().subtype( + implicitTag=tag.Tag(tagClass=0, tagFormat=0, tagId=3))), + ) + + +class AsnPubKey(univ.Sequence): + '''ASN.1 contents of DER encoded public key: + + RSAPublicKey ::= SEQUENCE { + modulus INTEGER, -- n + publicExponent INTEGER, -- e + ''' + + componentType = namedtype.NamedTypes( + namedtype.NamedType('modulus', univ.Integer()), + namedtype.NamedType('publicExponent', univ.Integer()), + ) -- cgit v1.2.1