mirror of https://github.com/M66B/FairEmail.git
66 lines
2.4 KiB
Java
66 lines
2.4 KiB
Java
/*
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* BIP39 library, a Java implementation of BIP39
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* Copyright (C) 2017-2019 Alan Evans, NovaCrypto
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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* Original source: https://github.com/NovaCrypto/BIP39
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* You can contact the authors via github issues.
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*/
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package io.github.novacrypto.bip39;
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import io.github.novacrypto.toruntime.CheckedExceptionToRuntime;
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import javax.crypto.SecretKey;
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import javax.crypto.SecretKeyFactory;
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import javax.crypto.spec.PBEKeySpec;
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import static io.github.novacrypto.toruntime.CheckedExceptionToRuntime.toRuntime;
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/**
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* Not available in all Java implementations, for example will not find the implementation before Android API 26+.
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* See https://developer.android.com/reference/javax/crypto/SecretKeyFactory.html for more details.
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*/
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public enum JavaxPBKDF2WithHmacSHA512 implements PBKDF2WithHmacSHA512 {
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INSTANCE;
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private SecretKeyFactory skf = getPbkdf2WithHmacSHA512();
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@Override
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public byte[] hash(char[] chars, byte[] salt) {
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final PBEKeySpec spec = new PBEKeySpec(chars, salt, 2048, 512);
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final byte[] encoded = generateSecretKey(spec).getEncoded();
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spec.clearPassword();
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return encoded;
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}
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private SecretKey generateSecretKey(final PBEKeySpec spec) {
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return toRuntime(new CheckedExceptionToRuntime.Func<SecretKey>() {
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@Override
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public SecretKey run() throws Exception {
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return skf.generateSecret(spec);
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}
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});
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}
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private static SecretKeyFactory getPbkdf2WithHmacSHA512() {
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return toRuntime(new CheckedExceptionToRuntime.Func<SecretKeyFactory>() {
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@Override
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public SecretKeyFactory run() throws Exception {
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return SecretKeyFactory.getInstance("PBKDF2WithHmacSHA512");
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}
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});
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}
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} |