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java.lang.Object | +--net.rim.device.api.crypto.ECNRSignatureVerifier
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 ).
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 clients. If you intend to use this element, please contact RIM to establish the necessary agreements that will allow you to have your COD files signed. Signing is only required for use on the device, development under the JDE can occur without signing the CODs.
ECNRSignatureSigner| Constructor Summary | ||
|
ECNRSignatureVerifier(ECPublicKey key,
byte[] r,
int rOffset,
byte[] s,
int sOffset)
Constructs an ECNRSignatureVerifier object using SHA-1 for the digest. |
|
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ECNRSignatureVerifier(ECPublicKey key,
Digest digest,
byte[] r,
int rOffset,
byte[] s,
int sOffset)
Constructs an ECNRSignatureVerifier object using a specified
digest. |
|
| Method Summary | ||
|
String |
getAlgorithm()
Returns the name of the signing algorithm used, ie "ECNR/" + Digest.getAlgorithm(). |
|
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 |
public ECNRSignatureVerifier(ECPublicKey key, byte[] r, int rOffset, byte[] s, int sOffset) throws CryptoTokenException, CryptoUnsupportedOperationException, InvalidSignatureEncodingException
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.
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.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.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 clients. If you intend to use this element, please contact RIM to establish the necessary agreements that will allow you to have your COD files signed. Signing is only required for use on the device, development under the JDE can occur without signing the CODs.
public ECNRSignatureVerifier(ECPublicKey key, Digest digest, byte[] r, int rOffset, byte[] s, int sOffset) throws CryptoTokenException, CryptoUnsupportedOperationException, InvalidSignatureEncodingException
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.
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.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.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 clients. If you intend to use this element, please contact RIM to establish the necessary agreements that will allow you to have your COD files signed. Signing is only required for use on the device, development under the JDE can occur without signing the CODs.
| Method Detail |
public String getAlgorithm()
"ECNR/" + Digest.getAlgorithm().
SignatureVerifierCerticom Contact Information
Phone:613-254-9258
Email: sales@certicom.com
Website: http://www.certicom.com/rim
Signed: This element is only accessible by signed clients. If you intend to use this element, please contact RIM to establish the necessary agreements that will allow you to have your COD files signed. Signing is only required for use on the device, development under the JDE can occur without signing the CODs.
public void update(byte[] data)
SignatureVerifier
SignatureVerifierdata - A byte array containing the message data to hash.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 clients. If you intend to use this element, please contact RIM to establish the necessary agreements that will allow you to have your COD files signed. Signing is only required for use on the device, development under the JDE can occur without signing the CODs.
public void update(byte[] data,
int offset,
int length)
SignatureVerifier
SignatureVerifierdata - The message data to hash.offset - The offset, or initial position to start reading in the data.length - The amount of data to read.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 clients. If you intend to use this element, please contact RIM to establish the necessary agreements that will allow you to have your COD files signed. Signing is only required for use on the device, development under the JDE can occur without signing the CODs.
public void update(int data)
SignatureVerifier
SignatureVerifierdata - The byte to be hashed.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 clients. If you intend to use this element, please contact RIM to establish the necessary agreements that will allow you to have your COD files signed. Signing is only required for use on the device, development under the JDE can occur without signing the CODs.
public boolean verify()
throws CryptoTokenException,
CryptoUnsupportedOperationException
SignatureVerifier
SignatureVerifierCryptoTokenException - 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.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 clients. If you intend to use this element, please contact RIM to establish the necessary agreements that will allow you to have your COD files signed. Signing is only required for use on the device, development under the JDE can occur without signing the CODs.
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