com.cms.crypto
Class PublicKeyAdapter

java.lang.Object
  com.cms.crypto.PublicKeyAdapter

All Implemented Interfaces:

java.io.Serializable, java.security.Key, java.security.PublicKey

public class PublicKeyAdapter
extends java.lang.Object
implements java.security.PublicKey

Implements the PublicKey public interface and uses the Adapter design pattern to provide a meachanism to manipulate Java class PublicKey.

Version:

1.00 - 2006/02/26

Author:

support@phillipgriffin.com

See Also:

Serialized Form

Field Summary

Fields inherited from interface java.security.PublicKey

serialVersionUID

Constructor Summary

PublicKeyAdapter(java.security.PublicKey key)
Constructor for PublicKeyAdapter with public key parameter.

Method Summary

boolean	equals(java.lang.Object object) Returns boolean true or false indicating whether or not two public keys are the same.
java.lang.String	getAlgorithm() Returns a public key algorithm.
byte[]	getEncoded() Returns an encoded public key.
java.lang.String	getFormat() Returns a public key format.
byte[]	getMessageDigest() Gets a SHA-1 message digest of a value of ASN.1 type SubjectPublicKeyInfo for an ECDSA public key.
byte[]	getMessageDigest(DigestAlgorithmIdentifier algorithmId) Gets the message digest of a value of ASN.1 type SubjectPublicKeyInfo for an ECDSA public key using the hash algorithm specified by the provided digest algorithm identifier.
byte[]	getSubjectPublicKeyInfo() Gets the public key bits from a value of ASN.1 type SubjectPublicKeyInfo.
int	hashCode() Returns the message digest (hash) of a public key (SubjectPublicKeyInfo).
java.lang.String	toString() Returns a braces delimted string.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

PublicKeyAdapter

public PublicKeyAdapter(java.security.PublicKey key)

Constructor for PublicKeyAdapter with public key parameter.

Parameters:

key - the public key component of a public-private key pair

Method Detail

getAlgorithm

public java.lang.String getAlgorithm()

Returns a public key algorithm.

Specified by:

getAlgorithm in interface java.security.Key

getFormat

public java.lang.String getFormat()

Returns a public key format.

Specified by:

getFormat in interface java.security.Key

getEncoded

public byte[] getEncoded()

Returns an encoded public key.

Specified by:

getEncoded in interface java.security.Key

equals

public boolean equals(java.lang.Object object)

Returns boolean true or false indicating whether or not two public keys are the same.

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Returns the message digest (hash) of a public key (SubjectPublicKeyInfo).

Overrides:

hashCode in class java.lang.Object

toString

public java.lang.String toString()

Returns a braces delimted string.

Overrides:

toString in class java.lang.Object

getSubjectPublicKeyInfo

public byte[] getSubjectPublicKeyInfo()
                               throws DecodingException,
                                      java.io.IOException

Gets the public key bits from a value of ASN.1 type SubjectPublicKeyInfo.

Shades of Brian Korver (aka Luke Bytewalker)! We're byte walking the following ASN.1 value to get the encoded ECPublicKey bits.

For ECMQV, the OriginatorPublicKey.algorithm.parameters field always contains an OpenType that contains an OBJECT IDENTIFIER that indicates a named elliptic curve.

We are assuming here that all tags are one byte in length.

 SubjectPublicKeyInfo ::= SEQUENCE {
    algorithm  PublicKeyAlgorithmIdentifier,
    publicKey  BIT STRING
 }
 

Returns:

the public key bits

Throws:

DecodingException

java.io.IOException

getMessageDigest

public byte[] getMessageDigest()
                        throws DecodingException,
                               java.io.IOException,
                               java.security.NoSuchAlgorithmException

Gets a SHA-1 message digest of a value of ASN.1 type SubjectPublicKeyInfo for an ECDSA public key.

Returns:

a message digest (SHA-1 hash)

Throws:

DecodingException

java.io.IOException

java.security.NoSuchAlgorithmException

getMessageDigest

public byte[] getMessageDigest(DigestAlgorithmIdentifier algorithmId)
                        throws DecodingException,
                               java.io.IOException,
                               java.security.NoSuchAlgorithmException

Gets the message digest of a value of ASN.1 type SubjectPublicKeyInfo for an ECDSA public key using the hash algorithm specified by the provided digest algorithm identifier.

Parameters:

algorithmId - a message digest algorithm identifier

Returns:

a message digest (hash)

Throws:

DecodingException

java.io.IOException

java.security.NoSuchAlgorithmException