Example usage for org.bouncycastle.crypto.engines AESEngine init

Introduction

In this page you can find the example usage for org.bouncycastle.crypto.engines AESEngine init.

Prototype

public void init(boolean forEncryption, CipherParameters params) 

Source Link

Document

initialise an AES cipher.

Usage

From source file:com.nimbusds.jose.crypto.impl.LegacyAESGCM.java

License:Apache License

/**
 * Creates a new AES cipher./*from   ww  w. j  av a  2 s  . c  om*/
 *
 * @param secretKey     The AES key. Must not be {@code null}.
 * @param forEncryption If {@code true} creates an AES encryption
 *                      cipher, else creates an AES decryption
 *                      cipher.
 *
 * @return The AES cipher.
 */
public static AESEngine createAESCipher(final SecretKey secretKey, final boolean forEncryption) {

    AESEngine cipher = new AESEngine();

    CipherParameters cipherParams = new KeyParameter(secretKey.getEncoded());

    cipher.init(forEncryption, cipherParams);

    return cipher;
}

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From source file:io.warp10.script.lora.LORAENC.java

License:Apache License

@Override
public Object apply(WarpScriptStack stack) throws WarpScriptException {

    Object top = stack.pop();//w  w  w. ja  v a2s.  c  o  m

    if (!(top instanceof String)) {
        throw new WarpScriptException(getName() + " expects a 128 bits hex encoded key on top of the stack.");
    }

    String keystr = top.toString();

    if (keystr.length() != 32) {
        throw new WarpScriptException(getName() + " expects a 128 bits hex encoded key on top of the stack.");
    }

    top = stack.pop();

    if (!(top instanceof Long)) {
        throw new WarpScriptException(getName() + " expects a sequence counter below the key.");
    }

    int sequenceCounter = ((Number) top).intValue();

    top = stack.pop();

    if (!(top instanceof Long)) {
        throw new WarpScriptException(
                getName() + " expects a direction (0 uplink or 1 downlink) below the sequence counter.");
    }

    int dir = ((Number) top).intValue();

    if (0 != dir && 1 != dir) {
        throw new WarpScriptException(
                getName() + " expects a direction (0 uplink or 1 downlink) below the sequence counter.");
    }

    top = stack.pop();

    if (!(top instanceof Long)) {
        throw new WarpScriptException(getName() + " expects a device address below the direction.");
    }

    int addr = ((Number) top).intValue();

    String datastr = stack.pop().toString();

    if (0 != datastr.length() % 2) {
        throw new WarpScriptException(
                getName() + " expects a hex encoded data frame with an even length of hex digits.");
    }

    byte[] data = Hex.decode(datastr);

    //
    // Compute MIC block B0
    //

    byte[] ABlock = new byte[16];

    ABlock[0] = 0x01;
    ABlock[5] = (byte) (dir & 0x1);
    ABlock[6] = (byte) (addr & 0xFF);
    ABlock[7] = (byte) ((addr >> 8) & 0xFF);
    ABlock[8] = (byte) ((addr >> 16) & 0xFF);
    ABlock[9] = (byte) ((addr >> 24) & 0xFF);

    ABlock[10] = (byte) ((sequenceCounter) & 0xFF);
    ABlock[11] = (byte) ((sequenceCounter >> 8) & 0xFF);
    ABlock[12] = (byte) ((sequenceCounter >> 16) & 0xFF);
    ABlock[13] = (byte) ((sequenceCounter >> 24) & 0xFF);

    int nblocks = data.length / 16 + (0 == data.length % 16 ? 0 : 1);

    AESEngine aes = new AESEngine();
    KeyParameter key = new KeyParameter(Hex.decode(keystr));
    aes.init(true, key);

    byte[] SBlock = new byte[16];

    int offset = 0;

    for (int i = 0; i < nblocks; i++) {
        ABlock[15] = (byte) (i & 0xFF);
        aes.reset();
        aes.processBlock(ABlock, 0, SBlock, 0);

        for (int k = 0; i < 16; i++) {
            if (offset + k < data.length) {
                data[offset + k] = (byte) (data[offset + k] ^ SBlock[k]);
            }
        }
        offset += 16;
    }

    stack.push(new String(Hex.encode(data), Charsets.US_ASCII));

    return stack;
}

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From source file:org.ethereum.net.rlpx.FrameCodec.java

License:Open Source License

private AESEngine makeMacCipher() {
    // Stateless AES encryption
    AESEngine macc = new AESEngine();
    macc.init(true, new KeyParameter(mac));
    return macc;/*from  ww w.  ja  v a  2  s .  com*/
}

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From source file:org.picketlink.json.jose.crypto.AES.java

License:Open Source License

/**
 * Creates a new AES cipher.//  ww w .  j a  va 2 s  .c o  m
 *
 * @param secretKey The AES key. Must not be {@code null}.
 * @param forEncryption If {@code true} creates an AES encryption cipher, else creates an AES decryption cipher.
 *
 * @return The AES cipher.
 */
public static AESEngine createCipher(final SecretKey secretKey, final boolean forEncryption) {

    AESEngine cipher = new AESEngine();
    CipherParameters cipherParams = new KeyParameter(secretKey.getEncoded());
    cipher.init(forEncryption, cipherParams);
    return cipher;
}

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