gnu.java.security.key.rsa
Class RSAKeyPairX509Codec
- IKeyPairCodec
An implementation of an
IKeyPairCodec that knows how to encode /
decode X.509 ASN.1 external representation of RSA public keys.
clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait |
encodePublicKey
public byte[] encodePublicKey(PublicKey key)
Returns the X.509 ASN.1
SubjectPublicKeyInfo representation of an
RSA public key. The ASN.1 specification, as defined in RFC-3280, and
RFC-2459, is as follows:
SubjectPublicKeyInfo ::= SEQUENCE {
algorithm AlgorithmIdentifier,
subjectPublicKey BIT STRING
}
AlgorithmIdentifier ::= SEQUENCE {
algorithm OBJECT IDENTIFIER,
parameters ANY DEFINED BY algorithm OPTIONAL
}
As indicated in RFC-2459: "The parameters field shall have ASN.1 type NULL
for this algorithm identifier.".
The
subjectPublicKey field, which is a BIT STRING, contains the
DER-encoded form of the RSA public key defined as:
RSAPublicKey ::= SEQUENCE {
modulus INTEGER, -- n
publicExponent INTEGER -- e
}
- encodePublicKey in interface IKeyPairCodec
- the ASN.1 representation of the SubjectPublicKeyInfo in an
X.509 certificate.
getFormatID
public int getFormatID()
Returns the unique identifier (within this library) of the format used to
externalise public and private keys.
- getFormatID in interface IKeyPairCodec
- the identifier of the format, the object supports.
RSAKeyPairX509Codec.java -- X.509 Encoding/Decoding handler
Copyright (C) 2006, 2010 Free Software Foundation, Inc.
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