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47 lines
1.9 KiB
Java
47 lines
1.9 KiB
Java
/*
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* Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package sun.security.provider;
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/**
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* An interface of a source of entropy input.
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*
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* @since 9
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*/
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public interface EntropySource {
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/**
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* Returns a byte array containing entropy.
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* <p>
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* This maps to the {@code Get_entropy_input} function defined in
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* Section 9 of NIST SP 800-90Ar1.
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*
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* @param minEntropy minimum entropy required, in bytes
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* @param minLength minimum length of output, in bytes
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* @param maxLength maximum length of output, in bytes
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* @param pr whether prediction resistance is required
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* @return the byte array containing entropy
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*/
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byte[] getEntropy(int minEntropy, int minLength, int maxLength, boolean pr);
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}
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