org.jasypt.salt.NoOpIVGenerator Maven / Gradle / Ivy

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Java library which enables encryption in java apps with minimum effort.

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package org.jasypt.salt;

/**
 * 
 * SNoOp implementation of {@link IVGenerator}, when you don't want to use an IV
 * for encryption.  This is useful if you need to decrypt an old password that was 
 * encrypted in an older version ofJasypt before there were IV's in JDK8.
 * 
 * 
 * This class is thread-safe.
 * 
 *
 * @since 1.9.3
 *
 * @author Melloware ([email protected])
 *
 */
public class NoOpIVGenerator implements IVGenerator {

    /**
     * Return IV with the specified byte length.
     *
     * @param lengthBytes length in bytes.
     * @return the generated salt.
     */ 
    @Override
    public byte[] generateIV(final int lengthBytes) {
        return null;
    }

    /**
     * As this salt generator provides a fixed IV, its inclusion
     * unencrypted in encryption results
     * is not necessary, and in fact not desirable (so that it remains hidden).
     *
     * @return false
     */
    @Override
    public boolean includePlainIVInEncryptionResults() {
        return false;
    }

}