本文整理了Java中org.spongycastle.util.encoders.Base64类的一些代码示例，展示了Base64类的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Base64类的具体详情如下：
包路径：org.spongycastle.util.encoders.Base64
类名称：Base64

Base64介绍

[英]Utility class for converting Base64 data to bytes and back again.
[中]用于将Base64数据转换为字节并再次转换回字节的实用程序类。

代码示例

代码示例来源：origin: ethereum/ethereumj

/**
 * Given a piece of text and a message signature encoded in base64, returns an ECKey
 * containing the public key that was used to sign it. This can then be compared to the expected public key to
 * determine if the signature was correct.
 *
 * @param messageHash a piece of human readable text that was signed
 * @param signatureBase64 The Ethereum-format message signature in base64
 *
 * @return -
 * @throws SignatureException If the public key could not be recovered or if there was a signature format error.
 */
public static byte[] signatureToKeyBytes(byte[] messageHash, String signatureBase64) throws SignatureException {
  byte[] signatureEncoded;
  try {
    signatureEncoded = Base64.decode(signatureBase64);
  } catch (RuntimeException e) {
    // This is what you get back from Bouncy Castle if base64 doesn't decode :(
    throw new SignatureException("Could not decode base64", e);
  }
  // Parse the signature bytes into r/s and the selector value.
  if (signatureEncoded.length < 65)
    throw new SignatureException("Signature truncated, expected 65 bytes and got " + signatureEncoded.length);
  return signatureToKeyBytes(
    messageHash,
    ECDSASignature.fromComponents(
      Arrays.copyOfRange(signatureEncoded, 1, 33),
      Arrays.copyOfRange(signatureEncoded, 33, 65),
      (byte) (signatureEncoded[0] & 0xFF)));
}

代码示例来源：origin: ethereum/ethereumj

/**
 *
 * @return -
 */
public String toBase64() {
  byte[] sigData = new byte[65];  // 1 header + 32 bytes for R + 32 bytes for S
  sigData[0] = v;
  System.arraycopy(bigIntegerToBytes(this.r, 32), 0, sigData, 1, 32);
  System.arraycopy(bigIntegerToBytes(this.s, 32), 0, sigData, 33, 32);
  return new String(Base64.encode(sigData), Charset.forName("UTF-8"));
}

代码示例来源：origin: blockchain/unused-My-Wallet-V3-jar

/**
 * Delete metadata entry
 */
public void deleteMetadata(String payload) throws IOException, InvalidCipherTextException,
    MetadataException {
  byte[] encryptedPayloadBytes;
  if (isEncrypted) {
    //base64 to buffer
    encryptedPayloadBytes = Base64.decode(AESUtil.encryptWithKey(encryptionKey, payload));
  } else {
    encryptedPayloadBytes = payload.getBytes("utf-8");
  }
  byte[] message = MetadataUtil.message(encryptedPayloadBytes, magicHash);
  String signature = node.signMessage(new String(Base64.encode(message)));
  Call<Void> response = getApiInstance().deleteMetadata(address, signature);
  Response<Void> exe = response.execute();
  if (!exe.isSuccessful()) {
    throw new MetadataException(exe.code() + " " + exe.message());
  } else {
    magicHash = null;
  }
}

代码示例来源：origin: com.madgag.spongycastle/core

public static String toBase64String(
  byte[] data,
  int off,
  int length)
{
  byte[] encoded = encode(data, off, length);
  return Strings.fromByteArray(encoded);
}

代码示例来源：origin: cternes/openkeepass

@Override
public String write(byte[] value) throws Exception {
  return Base64.toBase64String(value);
}

代码示例来源：origin: blockchain/unused-My-Wallet-V3-jar

encryptedPayloadBytes = Base64.decode(AESUtil.encryptWithKey(encryptionKey, payload));
} else {
  encryptedPayloadBytes = payload.getBytes("utf-8");
String signature = node.signMessage(new String(Base64.encode(message)));
body.setPayload(new String(Base64.encode(encryptedPayloadBytes)));
body.setSignature(signature);
body.setPrevMagicHash(magicHash != null ? Hex.toHexString(magicHash) : null);

代码示例来源：origin: CoinbaseWallet/toshi-headless-client

private void saveIvToFile(final byte[] iv) {
  final String toWrite = Base64.toBase64String(iv);
  //this.preferences.edit().putString(IV, toWrite).apply();
}

代码示例来源：origin: OPCFoundation/UA-Java-Legacy

/**
 * <p>base64Decode.</p>
 *
 * @param string a {@link java.lang.String} object.
 * @return an array of byte.
 */
public static byte[] base64Decode(String string) {
  return Base64.decode(string);
}

代码示例来源：origin: com.madgag.spongycastle/core

/**
 * encode the input data producing a base 64 encoded byte array.
 *
 * @return a byte array containing the base 64 encoded data.
 */
public static byte[] encode(
  byte[] data)
{
  return encode(data, 0, data.length);
}

代码示例来源：origin: nebulasio/neb.java

public static String Base64ToString(byte[] data) {
  return Base64.toBase64String(data);
}

代码示例来源：origin: nebulasio/neb.java

public static byte[] Base64ToBytes(String data) {
  return Base64.decode(data);
}

代码示例来源：origin: OPCFoundation/UA-Java-Legacy

/** {@inheritDoc} */
@Override
public String base64Encode(byte[] bytes) {
  try {
    return new String(Base64.encode(bytes), "UTF-8");
  } catch (UnsupportedEncodingException e) {
    throw new RuntimeException(e);
  }
}

代码示例来源：origin: cternes/openkeepass

@Override
public String write(UUID value) throws Exception {
  if(value == null) {
    return Base64.toBase64String(new byte[0]);
  }
  
  return Base64.toBase64String(ByteUtils.uuidToBytes(value));
}

代码示例来源：origin: cternes/openkeepass

@Override
public byte[] read(String value) throws Exception {
  return Base64.decode(value.getBytes());
}

代码示例来源：origin: OPCFoundation/UA-Java-Legacy

/** {@inheritDoc} */
@Override
public String base64Encode(byte[] bytes) {
  try {
    return new String(Base64.encode(bytes), "UTF-8");
  } catch (UnsupportedEncodingException e) {
    throw new RuntimeException(e);
  }
}

代码示例来源：origin: com.madgag.spongycastle/bcpkix-jdk15on

private String annotateRequest(byte[] data)
{
  int i = 0;
  StringWriter sw = new StringWriter();
  PrintWriter pw = new PrintWriter(sw);
  // pw.print("-----BEGIN CERTIFICATE REQUEST-----\n");
  do
  {
    if (i + 48 < data.length)
    {
      pw.print(Base64.toBase64String(data, i, 48));
      i += 48;
    }
    else
    {
      pw.print(Base64.toBase64String(data, i, data.length - i));
      i = data.length;
    }
    pw.print('\n');
  }
  while (i < data.length);
  //  pw.print("-----END CERTIFICATE REQUEST-----\n");
  pw.flush();
  return sw.toString();
}

代码示例来源：origin: OPCFoundation/UA-Java-Legacy

/** {@inheritDoc} */
@Override
public byte[] base64Decode(String string) {
  return Base64.decode(StringUtils.removeWhitespace(string));
}

代码示例来源：origin: OPCFoundation/UA-Java-Legacy

/**
 * <p>base64Encode.</p>
 *
 * @param bytes an array of byte.
 * @return a {@link java.lang.String} object.
 */
public static String base64Encode(byte[] bytes) {
  try {
    return new String(Base64.encode(bytes), "UTF-8");
  } catch (UnsupportedEncodingException e) {
    throw new RuntimeException(e);
  }
}

代码示例来源：origin: Multibit-Legacy/multibit-hardware

/**
 * <p>Get an SSH key from the compressed EC public key in base64</p>
 *
 * @param publicKey The ecdsa-sha2-nistp256 EC public key
 *
 * @return An ssh key-only base64 format of public key from given EC public key
 */
public static String decompressSSHKeyFromNistp256(ECPublicKey publicKey) {
 ByteBuffer buffer = ByteBuffer.allocate(104);
 buffer.putInt(KEY_PREFIX.getBytes(Charsets.UTF_8).length);
 buffer.put(KEY_PREFIX.getBytes(Charsets.UTF_8));
 buffer.putInt(CURVE_NAME.getBytes(Charsets.UTF_8).length);
 buffer.put(CURVE_NAME.getBytes(Charsets.UTF_8));
 byte[] octet = {(byte) 0x04}; // this is special byte for SSH
 byte[] x = publicKey.getW().getAffineX().toByteArray(); // get X, Y cords of ECPoint
 byte[] y = publicKey.getW().getAffineY().toByteArray();
 byte[] x32 = ByteUtils.subArray(x, x.length - 32, x.length); //get last 32 bytes
 byte[] y32 = ByteUtils.subArray(y, y.length - 32, y.length);
 // Ignore the y32 warning here in Intellij - it's just a naming mismatch in parameters
 byte[] data = ByteUtils.concatenate(octet, ByteUtils.concatenate(x32, y32));
 buffer.putInt(data.length);
 buffer.put(data);
 return Base64.toBase64String(buffer.array());
}

代码示例来源：origin: OPCFoundation/UA-Java-Legacy

/** {@inheritDoc} */
@Override
public byte[] base64Decode(String string) {
  return Base64.decode(StringUtils.removeWhitespace(string));
}