com.arxanfintech.common.crypto.Key Maven / Gradle / Ivy
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Copyright ArxanFintech Technology Ltd. 2018 All Rights Reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
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See the License for the specific language governing permissions and
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*******************************************************************************/
package com.arxanfintech.common.crypto;
import java.math.BigInteger;
/**
* An ECC public or private key
*/
public interface Key {
/**
* Safe access to the key's internal representation
*
* @return a copy of the key's internal representation
*/
byte[] toByteArray();
/**
* Return a key computable for this key with an offset.
* Due to a homomorphic property of EC one may compute the offset key of
* both private and public keys independently such that they build a valid new pair.
*
* @param offset offset
* @return a key derived of this with an offset.
*/
Key offsetKey(BigInteger offset);
}