Example usage for javax.crypto KeyGenerator getInstance

List of usage examples for javax.crypto KeyGenerator getInstance

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Introduction

In this page you can find the example usage for javax.crypto KeyGenerator getInstance.

Prototype

public static final KeyGenerator getInstance(String algorithm) throws NoSuchAlgorithmException

Source Link

Document

Returns a KeyGenerator object that generates secret keys for the specified algorithm.

Usage

From source file:com.owncloud.android.utils.EncryptionUtils.java

public static byte[] generateKey() {
    KeyGenerator keyGenerator;//from  w w w  .ja va2 s . c om
    try {
        keyGenerator = KeyGenerator.getInstance(AES);
        keyGenerator.init(128);

        return keyGenerator.generateKey().getEncoded();
    } catch (NoSuchAlgorithmException e) {
        Log_OC.e(TAG, e.getMessage());
    }

    return null;
}

From source file:cn.ctyun.amazonaws.services.s3.internal.crypto.EncryptionUtils.java

/**
 * Generates a one-time use Symmetric Key on-the-fly for use in envelope encryption.
 *///from w  w w  . j a v  a  2  s .  c o  m
public static SecretKey generateOneTimeUseSymmetricKey() {
    KeyGenerator generator;
    try {
        generator = KeyGenerator.getInstance(JceEncryptionConstants.SYMMETRIC_KEY_ALGORITHM);
        generator.init(JceEncryptionConstants.SYMMETRIC_KEY_LENGTH, new SecureRandom());
        return generator.generateKey();
    } catch (NoSuchAlgorithmException e) {
        throw new AmazonClientException("Unable to generate envelope symmetric key:" + e.getMessage(), e);
    }
}

From source file:pt.lunacloud.services.storage.internal.crypto.EncryptionUtils.java

/**
 * Generates a one-time use Symmetric Key on-the-fly for use in envelope encryption.
 *//*  w  w  w .jav  a2s.com*/
public static SecretKey generateOneTimeUseSymmetricKey() {
    KeyGenerator generator;
    try {
        generator = KeyGenerator.getInstance(JceEncryptionConstants.SYMMETRIC_KEY_ALGORITHM);
        generator.init(JceEncryptionConstants.SYMMETRIC_KEY_LENGTH, new SecureRandom());
        return generator.generateKey();
    } catch (NoSuchAlgorithmException e) {
        throw new LunacloudClientException("Unable to generate envelope symmetric key:" + e.getMessage(), e);
    }
}

From source file:org.apache.ws.security.message.WSSecEncrypt.java

private KeyGenerator getKeyGenerator() throws WSSecurityException {
    try {/*from   w  w w .j  a  v a  2s.  c  o m*/
        //
        // Assume AES as default, so initialize it
        //
        String keyAlgorithm = JCEMapper.getJCEKeyAlgorithmFromURI(symEncAlgo);
        KeyGenerator keyGen = KeyGenerator.getInstance(keyAlgorithm);
        if (symEncAlgo.equalsIgnoreCase(WSConstants.AES_128)) {
            keyGen.init(128);
        } else if (symEncAlgo.equalsIgnoreCase(WSConstants.AES_192)) {
            keyGen.init(192);
        } else if (symEncAlgo.equalsIgnoreCase(WSConstants.AES_256)) {
            keyGen.init(256);
        }
        return keyGen;
    } catch (NoSuchAlgorithmException e) {
        throw new WSSecurityException(WSSecurityException.UNSUPPORTED_ALGORITHM, null, null, e);
    }
}

From source file:org.apache.myfaces.shared_ext202patch.util.StateUtils.java

private static byte[] findSecret(String secret, String algorithm) {
    byte[] bytes = null;

    if (secret == null) {
        try {/*from   ww  w .ja v  a 2  s . com*/
            KeyGenerator kg = KeyGenerator.getInstance(algorithm);
            bytes = kg.generateKey().getEncoded();

            if (log.isLoggable(Level.FINE))
                log.fine("generated random password of length " + bytes.length);
        } catch (NoSuchAlgorithmException e) {
            // Generate random password length 8, 
            int length = 8;
            bytes = new byte[length];
            new Random().nextBytes(bytes);

            if (log.isLoggable(Level.FINE))
                log.fine("generated random password of length " + length);
        }
    } else {
        bytes = new Base64().decode(secret.getBytes());
    }

    return bytes;
}

From source file:org.apache.myfaces.shared.util.StateUtils.java

private static byte[] findSecret(String secret, String algorithm) {
    byte[] bytes = null;

    if (secret == null) {
        try {//from  www  .  j a  v  a 2s  . co m
            KeyGenerator kg = KeyGenerator.getInstance(algorithm);
            bytes = kg.generateKey().getEncoded();

            if (log.isLoggable(Level.FINE)) {
                log.fine("generated random password of length " + bytes.length);
            }
        } catch (NoSuchAlgorithmException e) {
            // Generate random password length 8, 
            int length = 8;
            bytes = new byte[length];
            new Random().nextBytes(bytes);

            if (log.isLoggable(Level.FINE)) {
                log.fine("generated random password of length " + length);
            }
        }
    } else {
        bytes = new Base64().decode(secret.getBytes());
    }

    return bytes;
}

From source file:org.apache.myfaces.shared_ext202patch.util.StateUtils.java

private static byte[] findMacSecret(String secret, String algorithm) {
    byte[] bytes = null;

    if (secret == null) {
        try {// ww  w . ja  v  a 2s  .com
            KeyGenerator kg = KeyGenerator.getInstance(algorithm);
            bytes = kg.generateKey().getEncoded();

            if (log.isLoggable(Level.FINE))
                log.fine("generated random mac password of length " + bytes.length);
        } catch (NoSuchAlgorithmException e) {
            // Generate random password length 8, 
            int length = 8;
            bytes = new byte[length];
            new Random().nextBytes(bytes);

            if (log.isLoggable(Level.FINE))
                log.fine("generated random mac password of length " + length);
        }
    } else {
        bytes = new Base64().decode(secret.getBytes());
    }

    return bytes;
}

From source file:org.apache.myfaces.shared.util.StateUtils.java

private static byte[] findMacSecret(String secret, String algorithm) {
    byte[] bytes = null;

    if (secret == null) {
        try {//from   w  ww.j  a v a 2 s.com
            KeyGenerator kg = KeyGenerator.getInstance(algorithm);
            bytes = kg.generateKey().getEncoded();

            if (log.isLoggable(Level.FINE)) {
                log.fine("generated random mac password of length " + bytes.length);
            }
        } catch (NoSuchAlgorithmException e) {
            // Generate random password length 8, 
            int length = 8;
            bytes = new byte[length];
            new Random().nextBytes(bytes);

            if (log.isLoggable(Level.FINE)) {
                log.fine("generated random mac password of length " + length);
            }
        }
    } else {
        bytes = new Base64().decode(secret.getBytes());
    }

    return bytes;
}

From source file:it.scoppelletti.programmerpower.security.CryptoUtils.java

/**
 * Restituisce un generatore di chiavi simmetriche.
 * /*from w  w  w  . ja  va  2s . com*/
 * <H4>1. Propriet&agrave;</H4>
 * 
 * <P><TABLE WIDTH="100%" BORDER="1" CELLPADDING="5">
 * <THEAD>
 * <TR>
 *     <TH>Propriet&agrave;</TH>
 *     <TH>Descrizione</TH>     
 * </TR>
 * </THEAD>
 * <TBODY>
 * <TR>
 *      <TD>{@code alg}</TD>
 *      <TD>Codice dell&rsquo;algoritmo di crittografia.</TD>
 * </TR>
 * <TR>
 *      <TD>{@code param.factory}</TD>
 *      <TD>Nome della classe di factory dei parametri specifici
 *      dell&rsquo;algoritmo; la classe deve implementare
 *      l&rsquo;interfaccia {@code AlgorithmParameterSpecFactory} e
 *      pu&ograve; prevedere altre propriet&agrave;.</TD>          
 * </TR>
 * <TR>
 *      <TD>{@code param.factory.prefix}</TD>
 *      <TD>Eventuale prefisso da applicare al nome delle propriet&agrave;
 *      interrogate dal provider {@code param.factory}.</TD>          
 * </TR> 
 * <TR>
 *      <TD>{@code key.size}</TD>
 *      <TD>Dimensione della chiave (numero di bit).</TD>          
 * </TR> 
 * <TR>
 *     <TD COLSPAN="2">Le propriet&agrave; {@code param.factory} e
 *     {@code key.size} non possono essere entrambe impostate; se nessuna
 *     delle due propriet&agrave; &egrave; impostata, il generatore
 *     sar&agrave; inizializzato con i parametri di default definiti dallo
 *     specifico provider JCA.</TD>
 * </TR>
 * </TBODY>
 * </TABLE></P>
 *    
 * @param  props  Propriet&agrave;.
 * @param  prefix Prefisso da applicare al nome delle propriet&agrave; da
 *                interrogare. Pu&ograve; essere {@code null}.
 * @return        Oggetto.
 * @see    it.scoppelletti.programmerpower.security.spi.AlgorithmParameterSpecFactory
 * @see    <A HREF="{@docRoot}/it/scoppelletti/programmerpower/security/CryptoUtils.html#idAlg">Algoritmi
 *         di crittografia</A> 
 */
public static KeyGenerator getKeyGenerator(Properties props, String prefix) {
    int keySize;
    String alg, name;
    KeyGenerator gen;
    AlgorithmParameterSpec params;
    SecurityResources res = new SecurityResources();

    if (props == null) {
        throw new ArgumentNullException("props");
    }

    name = Strings.concat(prefix, CryptoUtils.PROP_KEYALGORITHM);
    alg = props.getProperty(name);
    if (Strings.isNullOrEmpty(alg)) {
        throw new ArgumentNullException(name);
    }

    params = CryptoUtils.getAlgorithmParameterSpec(props, prefix);
    keySize = CryptoUtils.getKeySize(props, prefix);
    if (params != null && keySize >= 0) {
        throw new IllegalArgumentException(
                res.getArgumentIncompatibilityException(Strings.concat(prefix, CryptoUtils.PROP_PARAMFACTORY),
                        Strings.concat(prefix, CryptoUtils.PROP_KEYSIZE)));
    }

    try {
        gen = KeyGenerator.getInstance(alg);
        if (params != null) {
            gen.init(params);
        }
        if (keySize >= 0) {
            gen.init(keySize);
        }
    } catch (GeneralSecurityException ex) {
        throw SecurityUtils.toSecurityException(ex);
    }

    return gen;
}

From source file:org.apache.hadoop.mapreduce.v2.app.MRAppMaster.java

/**
 * Obtain the tokens needed by the job and put them in the UGI
 * @param conf/*from  w w  w  . j  a  va2s. c  o m*/
 */
protected void initJobCredentialsAndUGI(Configuration conf) {

    try {
        this.currentUser = UserGroupInformation.getCurrentUser();
        this.jobCredentials = ((JobConf) conf).getCredentials();
        if (CryptoUtils.isEncryptedSpillEnabled(conf)) {
            int keyLen = conf.getInt(MRJobConfig.MR_ENCRYPTED_INTERMEDIATE_DATA_KEY_SIZE_BITS,
                    MRJobConfig.DEFAULT_MR_ENCRYPTED_INTERMEDIATE_DATA_KEY_SIZE_BITS);
            KeyGenerator keyGen = KeyGenerator.getInstance(INTERMEDIATE_DATA_ENCRYPTION_ALGO);
            keyGen.init(keyLen);
            encryptedSpillKey = keyGen.generateKey().getEncoded();
        } else {
            encryptedSpillKey = new byte[] { 0 };
        }
    } catch (IOException e) {
        throw new YarnRuntimeException(e);
    } catch (NoSuchAlgorithmException e) {
        throw new YarnRuntimeException(e);
    }
}