anon.crypto
Class MyECDSASignature

java.lang.Object
  anon.crypto.MyECDSASignature

All Implemented Interfaces:

IMySignature, ISignatureCreationAlgorithm, ISignatureVerificationAlgorithm

public final class MyECDSASignature
extends java.lang.Object
implements IMySignature

Field Summary

(package private) org.bouncycastle.crypto.digests.SHA1Digest	m_digest
private java.security.Key	m_initKey
(package private) org.bouncycastle.crypto.signers.ECDSASigner	m_signatureAlgorithm
private static org.bouncycastle.asn1.x509.AlgorithmIdentifier	ms_identifier

Constructor Summary

MyECDSASignature()

Method Summary

byte[]	decodeForXMLSignature(byte[] a_encodedSignature) Tries to decode a signature in a way as it would meet the W3C standard for XML signature values.
byte[]	encodeForXMLSignature(byte[] a_signature) Encodes a signature in a way it meets the W3C standard for XML signature values.
org.bouncycastle.asn1.x509.AlgorithmIdentifier	getIdentifier() Returns the algorithm identifier.
java.lang.String	getXMLSignatureAlgorithmReference() Returns a description of the the signature algorithm for XML signatures as defined in http://www.w3.org/TR/xmldsig-core/#sec-AlgID.
void	initSign(IMyPrivateKey k) Initialises the algorithm for signing.
void	initVerify(IMyPublicKey k) Initialises the algorithm for verifying.
byte[]	sign(byte[] bytesToSign) Signs a message and returns the signature.
boolean	verify(byte[] a_message, byte[] a_signature) Tests if the signature of a specified message is valid.
boolean	verify(byte[] a_message, int message_offset, int message_len, byte[] a_signature, int signature_offset, int signature_len) Tests if the signature of a specified message is valid.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

ms_identifier

private static final org.bouncycastle.asn1.x509.AlgorithmIdentifier ms_identifier

m_digest

org.bouncycastle.crypto.digests.SHA1Digest m_digest

m_signatureAlgorithm

org.bouncycastle.crypto.signers.ECDSASigner m_signatureAlgorithm

m_initKey

private java.security.Key m_initKey

Constructor Detail

MyECDSASignature

public MyECDSASignature()

Method Detail

encodeForXMLSignature

public byte[] encodeForXMLSignature(byte[] a_signature)

Description copied from interface: IMySignature

Encodes a signature in a way it meets the W3C standard for XML signature values. Without this encoding, XML signatures cannot be created by this algorithm.

Specified by:

encodeForXMLSignature in interface IMySignature

Specified by:

encodeForXMLSignature in interface ISignatureCreationAlgorithm

Parameters:

a_signature - an non-encoded signature

Returns:

the encoded signature or null if an error occured

See Also:

http://www.w3.org/TR/xmldsig-core/#sec-SignatureAlg

decodeForXMLSignature

public byte[] decodeForXMLSignature(byte[] a_encodedSignature)

Description copied from interface: IMySignature

Tries to decode a signature in a way as it would meet the W3C standard for XML signature values. Without this decoding, XML signatures cannot be verified by this algorithm.

Specified by:

decodeForXMLSignature in interface IMySignature

Specified by:

decodeForXMLSignature in interface ISignatureVerificationAlgorithm

Parameters:

a_encodedSignature - an encoded signature

Returns:

the decoded signature or null if an error occured

See Also:

http://www.w3.org/TR/xmldsig-core/#sec-SignatureAlg

getXMLSignatureAlgorithmReference

public java.lang.String getXMLSignatureAlgorithmReference()

Description copied from interface: IMySignature

Returns a description of the the signature algorithm for XML signatures as defined in http://www.w3.org/TR/xmldsig-core/#sec-AlgID. This description is optional, documents may be signed without it.

Specified by:

getXMLSignatureAlgorithmReference in interface IMySignature

Specified by:

getXMLSignatureAlgorithmReference in interface ISignatureCreationAlgorithm

Specified by:

getXMLSignatureAlgorithmReference in interface ISignatureVerificationAlgorithm

Returns:

http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha1

See Also:

http://www.w3.org/TR/xmldsig-core/#sec-AlgID

initSign

public void initSign(IMyPrivateKey k)
              throws java.security.InvalidKeyException

Description copied from interface: IMySignature

Initialises the algorithm for signing. This must be done before doing the sign operation. The general contract of this method is that it must check if the algorithm has previously been initialised with the given key. If yes the method does nothing to save resources.

Specified by:

initSign in interface IMySignature

Parameters:

k - a private key

Throws:

java.security.InvalidKeyException - if the key is invalid

initVerify

public void initVerify(IMyPublicKey k)
                throws java.security.InvalidKeyException

Description copied from interface: IMySignature

Initialises the algorithm for verifying. This must be done before doing the verify operation. The general contract of this method is that it must check if the algorithm has previously been initialised with the given key. If yes the method does nothing to save resources.

Specified by:

initVerify in interface IMySignature

Parameters:

k - a public key

Throws:

java.security.InvalidKeyException - if the key is invalid

sign

public byte[] sign(byte[] bytesToSign)

Description copied from interface: IMySignature

Signs a message and returns the signature.

Specified by:

sign in interface IMySignature

Specified by:

sign in interface ISignatureCreationAlgorithm

Parameters:

bytesToSign - a message

Returns:

the signature that was created

verify

public boolean verify(byte[] a_message,
                      int message_offset,
                      int message_len,
                      byte[] a_signature,
                      int signature_offset,
                      int signature_len)

Description copied from interface: ISignatureVerificationAlgorithm

Tests if the signature of a specified message is valid.

Specified by:

verify in interface ISignatureVerificationAlgorithm

Parameters:

a_message - a message

message_offset - start of message

message_len - length of message

a_signature - a signature

signature_offset - start of signature

signature_len - length of signature

Returns:

true if the signature of a specified message is valid; false otherwiese

verify

public boolean verify(byte[] a_message,
                      byte[] a_signature)

Description copied from interface: IMySignature

Tests if the signature of a specified message is valid.

Specified by:

verify in interface IMySignature

Specified by:

verify in interface ISignatureVerificationAlgorithm

Parameters:

a_message - a message

a_signature - a signature

Returns:

true if the signature of a specified message is valid; false otherwiese

getIdentifier

public org.bouncycastle.asn1.x509.AlgorithmIdentifier getIdentifier()

Description copied from interface: ISignatureCreationAlgorithm

Returns the algorithm identifier.

Specified by:

getIdentifier in interface ISignatureCreationAlgorithm

Specified by:

getIdentifier in interface ISignatureVerificationAlgorithm

Returns:

the algorithm identifier