Example usage for org.bouncycastle.crypto.macs CMac CMac

Introduction

In this page you can find the example usage for org.bouncycastle.crypto.macs CMac CMac.

Prototype

public CMac(BlockCipher cipher, int macSizeInBits) 

Source Link

Document

create a standard MAC based on a block cipher with the size of the MAC been given in bits.

Usage

From source file:com.pearson.pdn.demos.chainoflearning.EventingUtility.java

License:Apache License

/**
 * Creates an auth token signed with principal's credentials
 * /*from   ww  w.ja v a2s  . c o  m*/
 * @param dateTime   utc time in yyyy-MM-dd'T'HH:mm:ssZ format 
 * @param delimiter   Delimiter to between token parts
 * @param principalId   Id portion of credentials
 * @param key   Secret portion of credentials
 * @param payload   Data being signed
 * @return   Token value
 * @throws UnsupportedEncodingException
 */
private static String generateAuthToken(String dateTime, String delimiter, String principalId, String key,
        String payload) throws UnsupportedEncodingException {
    // prepare the data
    byte[] macInput = (dateTime + payload).getBytes("UTF-8");
    byte[] macOutput = new byte[16];
    // sign the data
    CMac macProvider = new CMac(new AESFastEngine(), 128);
    macProvider.init(new KeyParameter(key.getBytes()));
    macProvider.update(macInput, 0, macInput.length);
    macProvider.doFinal(macOutput, 0);
    // hex the signed data
    String macOutputHex = new String(Hex.encode(macOutput));
    // concatenate the token parts
    return principalId + delimiter + dateTime + delimiter + macOutputHex;
}

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From source file:com.pearson.pdn.learningstudio.eventing.EventingClient.java

License:Apache License

/**
 * Creates an auth token signed with principal's credentials
 * /*from   w  w  w  . j  a v  a  2  s . c o  m*/
 * @param dateTime   utc time in yyyy-MM-dd'T'HH:mm:ssZ format 
 * @param delimiter   Delimiter to between token parts
 * @param principalId   Id portion of credentials
 * @param key   Secret portion of credentials
 * @param payload   Data being signed
 * @return   Token value
 * @throws UnsupportedEncodingException
 */
String generateAuthToken(String dateTime, String payload) throws UnsupportedEncodingException {
    // prepare the data
    byte[] macInput = (dateTime + payload).getBytes("UTF-8");
    byte[] macOutput = new byte[16];
    // sign the data
    CMac macProvider = new CMac(new AESFastEngine(), 128);
    macProvider.init(new KeyParameter(config.getPrincipalSecret().getBytes()));
    macProvider.update(macInput, 0, macInput.length);
    macProvider.doFinal(macOutput, 0);
    // hex the signed data
    String macOutputHex = new String(Hex.encode(macOutput));
    // concatenate the token parts
    return config.getPrincipalId() + DEFAULT_DELIMITER + dateTime + DEFAULT_DELIMITER + macOutputHex;
}

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From source file:common.crypto.bouncycastle.CCryptoCMacBC.java

License:Open Source License

@Override
public void initialize(CryptoTypes.EKeyLength eLen) {
    m_nKeyLen = CryptoTypes.getKeyLen(eLen);
    BlockCipher bc = new AESLightEngine();
    m_cmac = new CMac(bc, m_nKeyLen);

}

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From source file:de.tsenger.animamea.crypto.AmAESCrypto.java

License:Open Source License

@Override
public byte[] getMAC(byte[] data) {

    byte[] n = new byte[sscBytes.length + data.length];
    System.arraycopy(sscBytes, 0, n, 0, sscBytes.length);
    System.arraycopy(data, 0, n, sscBytes.length, data.length);
    n = addPadding(n);/*from ww w  .j av a  2 s .  co  m*/

    BlockCipher cipher = new AESFastEngine();
    Mac mac = new CMac(cipher, 64);

    mac.init(keyP);
    mac.update(n, 0, n.length);
    byte[] out = new byte[mac.getMacSize()];

    mac.doFinal(out, 0);

    return out;
}

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From source file:de.tsenger.animamea.crypto.AmAESCrypto.java

License:Open Source License

@Override
public byte[] getMAC(byte[] key, byte[] data) {
    BlockCipher cipher = new AESFastEngine();
    Mac mac = new CMac(cipher, 64); // TODO Padding der Daten

    KeyParameter keyP = new KeyParameter(key);
    mac.init(keyP);/*from  w  w  w  .  j a  v  a  2  s . co m*/

    mac.update(data, 0, data.length);

    byte[] out = new byte[8];

    mac.doFinal(out, 0);

    return out;
}

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