Java Digest.doFinal方法代碼示例

import org.bouncycastle.crypto.Digest; //導入方法依賴的package包/類
static byte[] calculateKeyId(SubjectPublicKeyInfo info)
{
    Digest dig = new SHA1Digest();    // TODO: include definition of SHA-1 here
    byte[] hash = new byte[dig.getDigestSize()];
    byte[] spkiEnc = new byte[0];
    try
    {
        spkiEnc = info.getEncoded(ASN1Encoding.DER);
    }
    catch (IOException e)
    {
        return new byte[0];
    }

    // try the outlook 2010 calculation
    dig.update(spkiEnc, 0, spkiEnc.length);

    dig.doFinal(hash, 0);

    return hash;
}
 

import org.bouncycastle.crypto.Digest; //導入方法依賴的package包/類
private static BigInteger calculateHashForZeroKnowledgeProof(
    BigInteger g,
    BigInteger gr,
    BigInteger gx,
    String participantId,
    Digest digest)
{
    digest.reset();

    updateDigestIncludingSize(digest, g);

    updateDigestIncludingSize(digest, gr);

    updateDigestIncludingSize(digest, gx);

    updateDigestIncludingSize(digest, participantId);

    byte[] output = new byte[digest.getDigestSize()];
    digest.doFinal(output, 0);

    return new BigInteger(output);
}
 

import org.bouncycastle.crypto.Digest; //導入方法依賴的package包/類
/**
 * Calculates the MacKey (i.e. the key to use when calculating the MagTag for key confirmation).
 * <p/>
 * <p/>
 * <pre>
 * MacKey = H(K || "JPAKE_KC")
 * </pre>
 */
private static byte[] calculateMacKey(BigInteger keyingMaterial, Digest digest)
{
    digest.reset();

    updateDigest(digest, keyingMaterial);
    /*
     * This constant is used to ensure that the macKey is NOT the same as the derived key.
     */
    updateDigest(digest, "JPAKE_KC");

    byte[] output = new byte[digest.getDigestSize()];
    digest.doFinal(output, 0);

    return output;
}
 

import org.bouncycastle.crypto.Digest; //導入方法依賴的package包/類
/**
 * create an AuthorityKeyIdentifier with the GeneralNames tag and
 * the serial number provided as well.
 */
public AuthorityKeyIdentifier(
    SubjectPublicKeyInfo    spki,
    GeneralNames            name,
    BigInteger              serialNumber)
{
    Digest  digest = new SHA1Digest();
    byte[]  resBuf = new byte[digest.getDigestSize()];

    byte[] bytes = spki.getPublicKeyData().getBytes();
    digest.update(bytes, 0, bytes.length);
    digest.doFinal(resBuf, 0);

    this.keyidentifier = new DEROctetString(resBuf);
    this.certissuer = GeneralNames.getInstance(name.toASN1Primitive());
    this.certserno = new ASN1Integer(serialNumber);
}
 

import org.bouncycastle.crypto.Digest; //導入方法依賴的package包/類
private byte[] calcHash(Digest hashAlg)
{
    byte[] tmp = new byte[hashAlg.getDigestSize()];

    hashAlg.doFinal(tmp, 0);

    return tmp;
}
 

import org.bouncycastle.crypto.Digest; //導入方法依賴的package包/類
public byte[] generateServerKeyExchange()
    throws IOException
{

    if (this.dhParameters == null)
    {
        throw new TlsFatalAlert(AlertDescription.internal_error);
    }

    ByteArrayOutputStream buf = new ByteArrayOutputStream();

    DHKeyPairGenerator kpg = new DHKeyPairGenerator();
    kpg.init(new DHKeyGenerationParameters(context.getSecureRandom(), this.dhParameters));
    AsymmetricCipherKeyPair kp = kpg.generateKeyPair();

    BigInteger Ys = ((DHPublicKeyParameters)kp.getPublic()).getY();

    TlsDHUtils.writeDHParameter(dhParameters.getP(), buf);
    TlsDHUtils.writeDHParameter(dhParameters.getG(), buf);
    TlsDHUtils.writeDHParameter(Ys, buf);

    byte[] digestInput = buf.toByteArray();

    Digest d = new CombinedHash();
    SecurityParameters securityParameters = context.getSecurityParameters();
    d.update(securityParameters.clientRandom, 0, securityParameters.clientRandom.length);
    d.update(securityParameters.serverRandom, 0, securityParameters.serverRandom.length);
    d.update(digestInput, 0, digestInput.length);

    byte[] hash = new byte[d.getDigestSize()];
    d.doFinal(hash, 0);

    byte[] sigBytes = serverCredentials.generateCertificateSignature(hash);
    /*
     * TODO RFC 5246 4.7. digitally-signed element needs SignatureAndHashAlgorithm prepended from TLS 1.2
     */
    TlsUtils.writeOpaque16(sigBytes, buf);

    return buf.toByteArray();
}
 

import org.bouncycastle.crypto.Digest; //導入方法依賴的package包/類
static byte[] calculateKeyBlock_SSL(byte[] master_secret, byte[] random, int size)
{
    Digest md5 = new MD5Digest();
    Digest sha1 = new SHA1Digest();
    int md5Size = md5.getDigestSize();
    byte[] shatmp = new byte[sha1.getDigestSize()];
    byte[] tmp = new byte[size + md5Size];

    int i = 0, pos = 0;
    while (pos < size)
    {
        byte[] ssl3Const = SSL3_CONST[i];

        sha1.update(ssl3Const, 0, ssl3Const.length);
        sha1.update(master_secret, 0, master_secret.length);
        sha1.update(random, 0, random.length);
        sha1.doFinal(shatmp, 0);

        md5.update(master_secret, 0, master_secret.length);
        md5.update(shatmp, 0, shatmp.length);
        md5.doFinal(tmp, pos);

        pos += md5Size;
        ++i;
    }

    byte rval[] = new byte[size];
    System.arraycopy(tmp, 0, rval, 0, size);
    return rval;
}
 

import org.bouncycastle.crypto.Digest; //導入方法依賴的package包/類
static byte[] calculateMasterSecret_SSL(byte[] pre_master_secret, byte[] random)
{
    Digest md5 = new MD5Digest();
    Digest sha1 = new SHA1Digest();
    int md5Size = md5.getDigestSize();
    byte[] shatmp = new byte[sha1.getDigestSize()];

    byte[] rval = new byte[md5Size * 3];
    int pos = 0;

    for (int i = 0; i < 3; ++i)
    {
        byte[] ssl3Const = SSL3_CONST[i];

        sha1.update(ssl3Const, 0, ssl3Const.length);
        sha1.update(pre_master_secret, 0, pre_master_secret.length);
        sha1.update(random, 0, random.length);
        sha1.doFinal(shatmp, 0);

        md5.update(pre_master_secret, 0, pre_master_secret.length);
        md5.update(shatmp, 0, shatmp.length);
        md5.doFinal(rval, pos);

        pos += md5Size;
    }

    return rval;
}
 

import org.bouncycastle.crypto.Digest; //導入方法依賴的package包/類
protected void ssl3Complete(Digest d, byte[] ipad, byte[] opad, int padLength)
{
    byte[] secret = context.getSecurityParameters().masterSecret;

    d.update(secret, 0, secret.length);
    d.update(ipad, 0, padLength);

    byte[] tmp = new byte[d.getDigestSize()];
    d.doFinal(tmp, 0);

    d.update(secret, 0, secret.length);
    d.update(opad, 0, padLength);
    d.update(tmp, 0, tmp.length);
}
 

import org.bouncycastle.crypto.Digest; //導入方法依賴的package包/類
public static BigInteger calculateX(Digest digest, BigInteger N, byte[] salt, byte[] identity, byte[] password)
{
    byte[] output = new byte[digest.getDigestSize()];

    digest.update(identity, 0, identity.length);
    digest.update((byte)':');
    digest.update(password, 0, password.length);
    digest.doFinal(output, 0);

    digest.update(salt, 0, salt.length);
    digest.update(output, 0, output.length);
    digest.doFinal(output, 0);

    return new BigInteger(1, output);
}
 

import org.bouncycastle.crypto.Digest; //導入方法依賴的package包/類
/**
 * Hash the data and returns the first 8 bytes of the hash value.
 * @param data data over which the hash value is calculated.
 * @return long represented of the first 8 bytes
 */
public static long hash(byte[] data) {
    ParamUtil.requireNonNull("data", data);

    ConcurrentBagEntry<Digest> md0 = null;
    for (int i = 0; i < 3; i++) {
        try {
            md0 = MDS.borrow(10, TimeUnit.SECONDS);
            break;
        } catch (InterruptedException ex) { // CHECKSTYLE:SKIP
        }
    }

    if (md0 == null) {
        throw new RuntimeOperatorException("could not get idle MessageDigest");
    }

    try {
        Digest md = md0.value();
        md.reset();
        md.update(data, 0, data.length);
        byte[] bytes = new byte[md.getDigestSize()];
        md.doFinal(bytes, 0);

        return bytesToLong(bytes);
    } finally {
        MDS.requite(md0);
    }
}
 

import org.bouncycastle.crypto.Digest; //導入方法依賴的package包/類
public byte[] getDigest()
{
    byte[] bytes = bOut.toByteArray();

    bOut.reset();

    Digest sha1 = new SHA1Digest();

    sha1.update(bytes, 0, bytes.length);

    byte[] digest = new byte[sha1.getDigestSize()];

    sha1.doFinal(digest, 0);

    return digest;
}
 

import org.bouncycastle.crypto.Digest; //導入方法依賴的package包/類
private static byte[] doFinal(Digest d)
{
    byte[] bs = new byte[d.getDigestSize()];
    d.doFinal(bs, 0);
    return bs;
}
 

import org.bouncycastle.crypto.Digest; //導入方法依賴的package包/類
public byte[] modifyBytes(byte[] input) throws ModificationException{
    // Get the selected ByteModifier and use the modifyBytes method from their to update input.
    Digest digest;
    byte[] output;

    if (algoComboBox.getSelectedItem().equals("MD2")) {
        digest = new MD2Digest();
        output = new byte[digest.getDigestSize()];
    } else if (algoComboBox.getSelectedItem().equals("MD4")) {
        digest = new MD4Digest();
        output = new byte[digest.getDigestSize()];
    } else if (algoComboBox.getSelectedItem().equals("MD5")) {
        digest = new MD5Digest();
        output = new byte[digest.getDigestSize()];
    } else if (algoComboBox.getSelectedItem().equals("Keccak")) {
        digest = new KeccakDigest(Integer.parseInt((String)keccakComboBox.getSelectedItem()));
        output = new byte[digest.getDigestSize()];
    } else if (algoComboBox.getSelectedItem().equals("RIPEMD128")) {
        digest = new RIPEMD128Digest();
        output = new byte[digest.getDigestSize()];
    } else if (algoComboBox.getSelectedItem().equals("RIPEMD160")) {
        digest = new RIPEMD160Digest();
        output = new byte[digest.getDigestSize()];
    } else if (algoComboBox.getSelectedItem().equals("RIPEMD256")) {
        digest = new RIPEMD256Digest();
        output = new byte[digest.getDigestSize()];
    }  else if (algoComboBox.getSelectedItem().equals("RIPEMD320")) {
        digest = new RIPEMD320Digest();
        output = new byte[digest.getDigestSize()];
    } else if (algoComboBox.getSelectedItem().equals("SHA1")) {
        digest = new SHA1Digest();
        output = new byte[digest.getDigestSize()];
    } else if (algoComboBox.getSelectedItem().equals("SHA224")) {
        digest = new SHA224Digest();
        output = new byte[digest.getDigestSize()];
    } else if (algoComboBox.getSelectedItem().equals("SHA256")) {
        digest = new SHA256Digest();
        output = new byte[digest.getDigestSize()];
    } else if (algoComboBox.getSelectedItem().equals("SHA384")) {
        digest = new SHA384Digest();
        output = new byte[digest.getDigestSize()];
    } else if (algoComboBox.getSelectedItem().equals("SHA3")) {
        digest = new SHA3Digest(Integer.parseInt((String)sha3ComboBox.getSelectedItem()));
        output = new byte[digest.getDigestSize()];
    } else if (algoComboBox.getSelectedItem().equals("SHAKE")) {
        digest = new SHAKEDigest(Integer.parseInt((String)shakeComboBox.getSelectedItem()));
        output = new byte[digest.getDigestSize()];
    } else if (algoComboBox.getSelectedItem().equals("SM3")) {
        digest = new SM3Digest();
        output = new byte[digest.getDigestSize()];
    } else if (algoComboBox.getSelectedItem().equals("Tiger")) {
        digest = new TigerDigest();
        output = new byte[digest.getDigestSize()];
    } else if (algoComboBox.getSelectedItem().equals("GOST3411")) {
        digest = new GOST3411Digest();
        output = new byte[digest.getDigestSize()];
    } else {
        digest = new WhirlpoolDigest();
        output = new byte[digest.getDigestSize()];
    }

    // KeccakDigest	224, 256, 288, 384, 512
    // SHA3Digest	224, 256, 384, 512
    // SHAKEDigest	128, 256

    digest.reset();
    digest.update(input, 0, input.length);
    digest.doFinal(output, 0);
    return output;
}
 

import org.bouncycastle.crypto.Digest; //導入方法依賴的package包/類
/**
 * Used by both Dual EC and Hash.
 */
static byte[] hash_df(Digest digest, byte[] seedMaterial, int seedLength)
{
     // 1. temp = the Null string.
    // 2. .
    // 3. counter = an 8-bit binary value representing the integer "1".
    // 4. For i = 1 to len do
    // Comment : In step 4.1, no_of_bits_to_return
    // is used as a 32-bit string.
    // 4.1 temp = temp || Hash (counter || no_of_bits_to_return ||
    // input_string).
    // 4.2 counter = counter + 1.
    // 5. requested_bits = Leftmost (no_of_bits_to_return) of temp.
    // 6. Return SUCCESS and requested_bits.
    byte[] temp = new byte[(seedLength + 7) / 8];

    int len = temp.length / digest.getDigestSize();
    int counter = 1;

    byte[] dig = new byte[digest.getDigestSize()];

    for (int i = 0; i <= len; i++)
    {
        digest.update((byte)counter);

        digest.update((byte)(seedLength >> 24));
        digest.update((byte)(seedLength >> 16));
        digest.update((byte)(seedLength >> 8));
        digest.update((byte)seedLength);

        digest.update(seedMaterial, 0, seedMaterial.length);

        digest.doFinal(dig, 0);

        int bytesToCopy = ((temp.length - i * dig.length) > dig.length)
                ? dig.length
                : (temp.length - i * dig.length);
        System.arraycopy(dig, 0, temp, i * dig.length, bytesToCopy);

        counter++;
    }

    // do a left shift to get rid of excess bits.
    if (seedLength % 8 != 0)
    {
        int shift = 8 - (seedLength % 8);
        int carry = 0;

        for (int i = 0; i != temp.length; i++)
        {
            int b = temp[i] & 0xff;
            temp[i] = (byte)((b >>> shift) | (carry << (8 - shift)));
            carry = b;
        }
    }

    return temp;
}