net.lingala.zip4j.crypto.PBKDF2.PBKDF2HexFormatter Maven / Gradle / Ivy

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Zip4j - A Java library for zip files and streams

There is a newer version: 2.11.5

/*
 * Copyright 2010 Srikanth Reddy Lingala
 *
 * 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
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package net.lingala.zip4j.crypto.PBKDF2;

/*
 * Source referred from Matthias Gartner's PKCS#5 implementation -
 * see http://rtner.de/software/PBKDF2.html
 */

class PBKDF2HexFormatter {

  public boolean fromString(PBKDF2Parameters p, String s) {
    if (p == null || s == null) {
      return true;
    }

    String[] pSplit = s.split(":");
    if (pSplit.length != 3) {
      return true;
    }

    byte salt[] = BinTools.hex2bin(pSplit[0]);
    int iterationCount = Integer.parseInt(pSplit[1]);
    byte bDK[] = BinTools.hex2bin(pSplit[2]);

    p.setSalt(salt);
    p.setIterationCount(iterationCount);
    p.setDerivedKey(bDK);
    return false;
  }

  public String toString(PBKDF2Parameters p) {
    String s = BinTools.bin2hex(p.getSalt()) + ":" + String.valueOf(p.getIterationCount()) + ":"
        + BinTools.bin2hex(p.getDerivedKey());
    return s;
  }
}