public interface ECPublicKey extends PublicKey, ECKey
ECPublicKey
interface is used to verify signatures on
signed data using the ECDSA algorithm and to generate shared secrets using
the ECDH algorithm. An implementation of ECPublicKey
interface
must also implement the ECKey
interface methods.
When all components of the key (W, A, B, G, R, Field) are set, the key is initialized and ready for use.
The notation used to describe parameters specific to the EC algorithm is based on the naming conventions established in [IEEE P1363].
Modifier and Type | Method and Description |
---|---|
short |
getW(byte[] buffer,
short offset)
Returns the point of the curve comprising the public key in plain text
form.
|
void |
setW(byte[] buffer,
short offset,
short length)
Sets the point of the curve comprising the public key.
|
clearKey, getSize, getType, isInitialized
copyDomainParametersFrom, getA, getB, getField, getG, getK, getR, setA, setB, setFieldF2M, setFieldF2M, setFieldFP, setG, setK, setR
void setW(byte[] buffer, short offset, short length) throws CryptoException
Note:
javacardx.crypto.KeyEncryption
interface and the Cipher
object specified via setKeyCipher()
is not null
, the key value is decrypted using the Cipher
object.
buffer
- the input bufferoffset
- the offset into the input buffer at which the point
specification beginslength
- the byte length of the point specificationCryptoException
- with the following reason code:
CryptoException.ILLEGAL_VALUE
if the
length parameter is 0 or invalid or the
input parameter data format is incorrect, or if the input
parameter data is inconsistent with the key length, or if
input data decryption is required and fails.
short getW(byte[] buffer, short offset) throws CryptoException
buffer
- the output bufferoffset
- the offset into the output buffer at which the point
specification data is to beginCryptoException
- with the following reason code:
CryptoException.UNINITIALIZED_KEY
if
the point of the curve comprising the public key has not
been successfully initialized since the time the
initialized state of the key was set to false.
Key
Copyright © 1998, 2015, Oracle and/or its affiliates. All rights reserved. Use is subject to license terms