net.rim.device.api.crypto
Class X931SignatureVerifier

java.lang.Object
  net.rim.device.api.crypto.X931SignatureVerifier

All Implemented Interfaces:

SignatureVerifier

public final class X931SignatureVerifier
extends Object
implements SignatureVerifier

Represents the X931 signature verifier. This Signature verifier is defined in the ANSI X9.31 standard.

Note : Currently the only digests defined for use with this signature signer are SHA-1, SHA-256, SHA-384, SHA-512 and RIPEMD160. These are the only digests you can use with this class.

See Also:

X931SignatureSigner

Category:

Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.

Since:

BlackBerry API 3.6.0

Constructor Summary
	X931SignatureVerifier(RSAPublicKey key, byte[] signature, int signatureOffset) Creates a new X931SignatureVerifier object using SHA-1 as the digest.
	X931SignatureVerifier(RSAPublicKey key, Digest digest, byte[] signature, int signatureOffset) Creates a new X931SignatureVerifier object given a digest as an additional parameter.

Method Summary
	String	getAlgorithm() Returns the name of the signing algorithm used, eg "DSA", "ECDSA", etc.
	void	update(byte[] data) Adds additional message data to the signature.
	void	update(byte[] data, int offset, int length) Adds additional message data to the signature.
	void	update(int data) Adds additional message data to the signature.
	boolean	verify() Returns true if the signature is valid, false otherwise.

Methods inherited from class java.lang.Object

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

Constructor Detail

X931SignatureVerifier

public X931SignatureVerifier(RSAPublicKey key,
                             byte[] signature,
                             int signatureOffset)
                      throws InvalidSignatureEncodingException

Creates a new X931SignatureVerifier object using SHA-1 as the digest.

Parameters:

key - The Public key used to verifiy the signature.

signature - A byte array containing the signature data.

signatureOffset - The offset of the signature data within the array.

Throws:

InvalidSignatureEncodingException

Category:

Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.

Since:

BlackBerry API 3.6.0

X931SignatureVerifier

public X931SignatureVerifier(RSAPublicKey key,
                             Digest digest,
                             byte[] signature,
                             int signatureOffset)
                      throws InvalidSignatureEncodingException

Creates a new X931SignatureVerifier object given a digest as an additional parameter.

Parameters:

key - The Public key used to verifiy the signature.

digest - The digest used to verify the signature.

signature - A byte array containing the signature data.

signatureOffset - The offset of the signature data within the array.

Throws:

InvalidSignatureEncodingException

Category:

Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.

Since:

BlackBerry API 3.6.0

Method Detail

getAlgorithm

public String getAlgorithm()

Description copied from interface: SignatureVerifier

Returns the name of the signing algorithm used, eg "DSA", "ECDSA", etc.

Specified by:

getAlgorithm in interface SignatureVerifier

Returns:

A String representing the name of the algorithm.

Category:

Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.

Since:

BlackBerry API 3.6.0

update

public void update(int data)

Description copied from interface: SignatureVerifier

Adds additional message data to the signature.

Specified by:

update in interface SignatureVerifier

Parameters:

data - The byte to be hashed.

Category:

Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.

Since:

BlackBerry API 3.6.0

update

public void update(byte[] data)

Description copied from interface: SignatureVerifier

Adds additional message data to the signature.

Specified by:

update in interface SignatureVerifier

Parameters:

data - A byte array containing the message data to hash.

Category:

Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.

Since:

BlackBerry API 3.6.0

update

public void update(byte[] data,
                   int offset,
                   int length)

Description copied from interface: SignatureVerifier

Adds additional message data to the signature.

Specified by:

update in interface SignatureVerifier

Parameters:

data - The message data to hash.

offset - The offset, or initial position to start reading in the data.

length - The amount of data to read.

Category:

Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.

Since:

BlackBerry API 3.6.0

verify

public boolean verify()
               throws CryptoTokenException,
                      CryptoUnsupportedOperationException

Description copied from interface: SignatureVerifier

Returns true if the signature is valid, false otherwise.

Specified by:

verify in interface SignatureVerifier

Returns:

A boolean that returns true if the signature is valid, false otherwise.

Throws:

CryptoTokenException - Thrown when a problem occurs with a crypto token or the crypto token is invalid.

CryptoUnsupportedOperationException - Thrown when a call is made to an unsupported operation.

Category:

Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.

Since:

BlackBerry API 3.6.0