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net.rim.device.api.crypto
Class ECNRSignatureVerifier

java.lang.Object
  |
  +--net.rim.device.api.crypto.ECNRSignatureVerifier
All Implemented Interfaces:
SignatureVerifier

public final class ECNRSignatureVerifier
extends Object
implements SignatureVerifier

Verifies an Elliptic Curve Nyberg-Rueppel (ECNR) signature on a message.

Elliptic Curve cryptography is defined in various standards including P1363 and ANSI X9.42. ECNR is defined in P1363 ( we implemented the version from the draft 13 document ).

Category:
Certicom: This element is part of the Certicom Cryptography APIs. The Certicom Cryptography APIs provide the tools you need, including ECC based algorithms, to integrate high performance data security into your applications, such as public key data encryption and decryption, digital signatures, and data authentication. Since the Certicom Cryptography API is already in the JDE, its use will remove the need for you to engage in time and resource intensive security integration so that you have lower development costs and a faster time to market. Use of the Certicom Cryptography API requires a license from Certicom. Please contact Certicom directly for more information on licensing fees and conditions.

Certicom Contact Information

Phone:613-254-9258

Email: sales@certicom.com

Website: http://www.certicom.com/rim
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:
JDE 3.6.0
See Also:
ECNRSignatureSigner

Constructor Summary
 Category: Certicom Category: Signed ECNRSignatureVerifier(ECPublicKey key, byte[] r, int rOffset, byte[] s, int sOffset)
          Constructs an ECNRSignatureVerifier object using SHA-1 for the digest.
 Category: Certicom Category: Signed ECNRSignatureVerifier(ECPublicKey key, Digest digest, byte[] r, int rOffset, byte[] s, int sOffset)
          Constructs an ECNRSignatureVerifier object using a specified digest.
 
Method Summary
 Category: Certicom Category: Signed  String getAlgorithm()
          Returns the name of the signing algorithm used, ie "ECNR/" + Digest.getAlgorithm().
 Category: Certicom Category: Signed  void update(byte[] data)
          Adds additional message data to the signature.
 Category: Certicom Category: Signed  void update(byte[] data, int offset, int length)
          Adds additional message data to the signature.
 Category: Certicom Category: Signed  void update(int data)
          Adds additional message data to the signature.
 Category: Certicom Category: Signed  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

ECNRSignatureVerifier

public ECNRSignatureVerifier(ECPublicKey key,
                             byte[] r,
                             int rOffset,
                             byte[] s,
                             int sOffset)
                      throws CryptoTokenException,
                             CryptoUnsupportedOperationException,
                             InvalidSignatureEncodingException
Constructs an ECNRSignatureVerifier object using SHA-1 for the digest.

NOTE: Also, if r and s point to the same buffer, then it is assumed that the length of r and the length of s are both exactly the length of the private key.

Parameters:
key - The public key to use to verify the signature.
r - The array containing the r part of the signature to verify. Note that r is an element of the finite field that the elliptic curve is defined over.
rOffset - The offset, or start position, of the signature data within the r array.
s - The array containing the s part of the signature to verify. Note that s is an element of the finite field that the elliptic curve is defined over.
sOffset - The offset, or start position, of the signature data within the s array.
Throws:
CryptoTokenException - Thrown if an error occurs with the crypto token or the crypto token is invalid.
CryptoUnsupportedOperationException - Thrown if a call is made to an unsupported operation.
Since:
JDE 3.6.0
Category:
Certicom: This element is part of the Certicom Cryptography APIs. The Certicom Cryptography APIs provide the tools you need, including ECC based algorithms, to integrate high performance data security into your applications, such as public key data encryption and decryption, digital signatures, and data authentication. Since the Certicom Cryptography API is already in the JDE, its use will remove the need for you to engage in time and resource intensive security integration so that you have lower development costs and a faster time to market. Use of the Certicom Cryptography API requires a license from Certicom. Please contact Certicom directly for more information on licensing fees and conditions.

Certicom Contact Information

Phone:613-254-9258

Email: sales@certicom.com

Website: http://www.certicom.com/rim
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.


ECNRSignatureVerifier

public ECNRSignatureVerifier(ECPublicKey key,
                             Digest digest,
                             byte[] r,
                             int rOffset,
                             byte[] s,
                             int sOffset)
                      throws CryptoTokenException,
                             CryptoUnsupportedOperationException,
                             InvalidSignatureEncodingException
Constructs an ECNRSignatureVerifier object using a specified digest.

NOTE: If the digest has any state information in it when it is given to the signature verifier, this information will be incorporated into the signature.

A newly created digest, which no update call has been made to, contains no state information in it by default.

NOTE: Also, if r and s point to the same buffer, then it is assumed that the length of r and the length of s are both exactly the length of the private key.

Parameters:
key - The public key used to verify the signature.
digest - The digest used for verification.
r - The array containing the r part of the signature to verify. Note that r is an element of the finite field that the elliptic curve is defined over.
rOffset - The offset, or start position, of the signature data within the r array.
s - The array containing the s part of the signature to verify. Note that s is an element of the finite field that the elliptic curve is defined over.
sOffset - The offset, or start position, of the signature data within the s array.
Throws:
CryptoTokenException - Thrown if an error occurs with the crypto token or the crypto token is invalid.
CryptoUnsupportedOperationException - Thrown if a call is made to an unsupported operation.
Since:
JDE 3.6.0
Category:
Certicom: This element is part of the Certicom Cryptography APIs. The Certicom Cryptography APIs provide the tools you need, including ECC based algorithms, to integrate high performance data security into your applications, such as public key data encryption and decryption, digital signatures, and data authentication. Since the Certicom Cryptography API is already in the JDE, its use will remove the need for you to engage in time and resource intensive security integration so that you have lower development costs and a faster time to market. Use of the Certicom Cryptography API requires a license from Certicom. Please contact Certicom directly for more information on licensing fees and conditions.

Certicom Contact Information

Phone:613-254-9258

Email: sales@certicom.com

Website: http://www.certicom.com/rim
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.

Method Detail

getAlgorithm

public String getAlgorithm()
Returns the name of the signing algorithm used, ie "ECNR/" + Digest.getAlgorithm().
Since:
JDE 3.6.0

Following copied from interface: SignatureVerifier
Returns:
A String representing the name of the algorithm.
Category:
Certicom: This element is part of the Certicom Cryptography APIs. The Certicom Cryptography APIs provide the tools you need, including ECC based algorithms, to integrate high performance data security into your applications, such as public key data encryption and decryption, digital signatures, and data authentication. Since the Certicom Cryptography API is already in the JDE, its use will remove the need for you to engage in time and resource intensive security integration so that you have lower development costs and a faster time to market. Use of the Certicom Cryptography API requires a license from Certicom. Please contact Certicom directly for more information on licensing fees and conditions.

Certicom Contact Information

Phone:613-254-9258

Email: sales@certicom.com

Website: http://www.certicom.com/rim
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.


update

public void update(byte[] data)
Description copied from interface: SignatureVerifier
Adds additional message data to the signature.

Since:
JDE 3.6.0

Following copied from interface: SignatureVerifier
Parameters:
data - A byte array containing the message data to hash.
Category:
Certicom: This element is part of the Certicom Cryptography APIs. The Certicom Cryptography APIs provide the tools you need, including ECC based algorithms, to integrate high performance data security into your applications, such as public key data encryption and decryption, digital signatures, and data authentication. Since the Certicom Cryptography API is already in the JDE, its use will remove the need for you to engage in time and resource intensive security integration so that you have lower development costs and a faster time to market. Use of the Certicom Cryptography API requires a license from Certicom. Please contact Certicom directly for more information on licensing fees and conditions.

Certicom Contact Information

Phone:613-254-9258

Email: sales@certicom.com

Website: http://www.certicom.com/rim
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.


update

public void update(byte[] data,
                   int offset,
                   int length)
Description copied from interface: SignatureVerifier
Adds additional message data to the signature.

Since:
JDE 3.6.0

Following copied from 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:
Certicom: This element is part of the Certicom Cryptography APIs. The Certicom Cryptography APIs provide the tools you need, including ECC based algorithms, to integrate high performance data security into your applications, such as public key data encryption and decryption, digital signatures, and data authentication. Since the Certicom Cryptography API is already in the JDE, its use will remove the need for you to engage in time and resource intensive security integration so that you have lower development costs and a faster time to market. Use of the Certicom Cryptography API requires a license from Certicom. Please contact Certicom directly for more information on licensing fees and conditions.

Certicom Contact Information

Phone:613-254-9258

Email: sales@certicom.com

Website: http://www.certicom.com/rim
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.


update

public void update(int data)
Description copied from interface: SignatureVerifier
Adds additional message data to the signature.

Since:
JDE 3.6.0

Following copied from interface: SignatureVerifier
Parameters:
data - The byte to be hashed.
Category:
Certicom: This element is part of the Certicom Cryptography APIs. The Certicom Cryptography APIs provide the tools you need, including ECC based algorithms, to integrate high performance data security into your applications, such as public key data encryption and decryption, digital signatures, and data authentication. Since the Certicom Cryptography API is already in the JDE, its use will remove the need for you to engage in time and resource intensive security integration so that you have lower development costs and a faster time to market. Use of the Certicom Cryptography API requires a license from Certicom. Please contact Certicom directly for more information on licensing fees and conditions.

Certicom Contact Information

Phone:613-254-9258

Email: sales@certicom.com

Website: http://www.certicom.com/rim
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.


verify

public boolean verify()
               throws CryptoTokenException,
                      CryptoUnsupportedOperationException
Description copied from interface: SignatureVerifier
Returns true if the signature is valid, false otherwise.

Since:
JDE 3.6.0

Following copied from 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:
Certicom: This element is part of the Certicom Cryptography APIs. The Certicom Cryptography APIs provide the tools you need, including ECC based algorithms, to integrate high performance data security into your applications, such as public key data encryption and decryption, digital signatures, and data authentication. Since the Certicom Cryptography API is already in the JDE, its use will remove the need for you to engage in time and resource intensive security integration so that you have lower development costs and a faster time to market. Use of the Certicom Cryptography API requires a license from Certicom. Please contact Certicom directly for more information on licensing fees and conditions.

Certicom Contact Information

Phone:613-254-9258

Email: sales@certicom.com

Website: http://www.certicom.com/rim
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.




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