Example usage for org.bouncycastle.crypto PBEParametersGenerator generateDerivedParameters

Introduction

In this page you can find the example usage for org.bouncycastle.crypto PBEParametersGenerator generateDerivedParameters.

Prototype

public abstract CipherParameters generateDerivedParameters(int keySize);

Source Link

Document

generate derived parameters for a key of length keySize.

Usage

From source file:com.wlami.mibox.core.encryption.PBKDF2.java

License:Open Source License

protected static byte[] doPbkdf2(String password, String salt, int rounds) {
    PBEParametersGenerator pbeParametersGenerator = new PKCS5S2ParametersGenerator();
    pbeParametersGenerator.init(PBEParametersGenerator.PKCS5PasswordToBytes(password.toCharArray()),
            PBEParametersGenerator.PKCS5PasswordToBytes(salt.toCharArray()), rounds);
    KeyParameter keyParameter = (KeyParameter) pbeParametersGenerator
            .generateDerivedParameters(DEFAULT_KEY_LENGTH_BIT);
    return keyParameter.getKey();
}

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From source file:edu.vt.middleware.crypt.pbe.AbstractPKCSKeyGenerator.java

License:Open Source License

/** {@inheritDoc} */
public byte[] generate(final char[] password, final int size) {
    if (size < 1) {
        throw new IllegalArgumentException("Size must be positive integer.");
    }/*  w w  w .java  2  s  . c  om*/

    final PBEParametersGenerator generator = newParamGenerator();
    generator.init(toBytes(password), salt, iterationCount);

    final KeyParameter p = (KeyParameter) generator.generateDerivedParameters(size);
    return p.getKey();
}

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From source file:edu.vt.middleware.crypt.PbeKeyGenerator.java

License:Open Source License

/**
 * Generate an encryption key from a password using the given parameter
 * generator./*from www  .ja v  a  2  s .  c  o m*/
 *
 * @param  generator  Key generator for specific PBE method.
 * @param  password  Password as byte array (depends on PBE method).
 * @param  keyBitLength  Size of generated key in bits.
 * @param  salt  Key initialization data.
 *
 * @return  Secret key derived from password using PBE key generation method.
 */
private SecretKey generate(final PBEParametersGenerator generator, final byte[] password,
        final int keyBitLength, final byte[] salt) {
    generator.init(password, salt, iterations);

    final KeyParameter keyParam = (KeyParameter) generator.generateDerivedParameters(keyBitLength);
    final SecretKeySpec spec = new SecretKeySpec(keyParam.getKey(), symmetricAlg.getAlgorithm());
    return spec;
}

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From source file:org.jruby.ext.openssl.PKCS5.java

License:Open Source License

private static RubyString generatePBEKey(final Ruby runtime, final char[] pass, final byte[] salt,
        final int iter, final int keySize) {
    PBEParametersGenerator generator = new PKCS5S2ParametersGenerator();
    generator.init(PBEParametersGenerator.PKCS5PasswordToBytes(pass), salt, iter);
    CipherParameters params = generator.generateDerivedParameters(keySize * 8);
    return StringHelper.newString(runtime, ((KeyParameter) params).getKey());
}

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From source file:org.jruby.ext.openssl.x509store.PEMInputOutput.java

License:LGPL

private static CipherParameters extractPBES2CipherParams(char[] password, PBES2Parameters pbeParams) {
    PBKDF2Params pbkdfParams = PBKDF2Params.getInstance(pbeParams.getKeyDerivationFunc().getParameters());
    int keySize = 192;
    if (pbkdfParams.getKeyLength() != null) {
        keySize = pbkdfParams.getKeyLength().intValue() * 8;
    }//from   w  w  w.j a va  2  s  .c  o  m
    int iterationCount = pbkdfParams.getIterationCount().intValue();
    byte[] salt = pbkdfParams.getSalt();
    PBEParametersGenerator generator = new PKCS5S2ParametersGenerator();
    generator.init(PBEParametersGenerator.PKCS5PasswordToBytes(password), salt, iterationCount);
    return generator.generateDerivedParameters(keySize);
}

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From source file:org.springframework.security.crypto.encrypt.BouncyCastleAesBytesEncryptor.java

License:Apache License

BouncyCastleAesBytesEncryptor(String password, CharSequence salt, BytesKeyGenerator ivGenerator) {
    if (ivGenerator.getKeyLength() != 16) {
        throw new IllegalArgumentException("ivGenerator key length != block size 16");
    }//w ww .j av a  2  s  . c om
    this.ivGenerator = ivGenerator;
    PBEParametersGenerator keyGenerator = new PKCS5S2ParametersGenerator();
    byte[] pkcs12PasswordBytes = PBEParametersGenerator.PKCS5PasswordToUTF8Bytes(password.toCharArray());
    keyGenerator.init(pkcs12PasswordBytes, Hex.decode(salt), 1024);
    this.secretKey = (KeyParameter) keyGenerator.generateDerivedParameters(256);
}

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