Java Code Examples for java.util.Base64#getEncoder()

@Test public void decodedLengthCalculates() {
  Base64.Encoder encoder = Base64.getEncoder();
  String base64 = encoder.encodeToString("31337".getBytes(UTF_8));
  assertThat(decodedLength(base64)).isEqualTo(5);

  base64 = encoder.withoutPadding().encodeToString("31337".getBytes(UTF_8));
  assertThat(decodedLength(base64)).isEqualTo(5);

  String longerBase64 = encoder.encodeToString("313373133731337".getBytes(UTF_8));
  assertThat(decodedLength(longerBase64)).isEqualTo(15);

  longerBase64 = encoder.withoutPadding().encodeToString("313373133731337".getBytes(UTF_8));
  assertThat(decodedLength(longerBase64)).isEqualTo(15);

  assertThat(decodedLength("")).isZero();
}
 

@Override
@Timed(name = "dw.remoteDatawaveUserService.reload", absolute = true)
public Collection<DatawaveUser> reload(Collection<SubjectIssuerDNPair> dns) throws AuthorizationException {
    Base64.Encoder encoder = Base64.getEncoder();
    // @formatter:off
    return executeGetMethodWithAuthorizationException("admin/reloadUsers",
            // We need to base64 encode each parameter as a work-around since DNs contain
            // commas, which are used as a separator for a multi-valued parameter.
            uriBuilder -> dns.stream()
                            .map(SubjectIssuerDNPair::toString)
                            .map(s -> encoder.encodeToString(s.getBytes()))
                            .forEach(s -> uriBuilder.addParameter("dns", s)),
            httpGet -> {},
            entity -> datawaveUserListReader.readValue(entity.getContent()),
            () -> "reload " + dns);
    // @formatter:on
}
 

public static StringEntity toJson(Map<String, String> entries) {
	Encoder encoder = Base64.getEncoder();
	try {
		return new StringEntity("[" + entries.entrySet().stream()
				.map(entry -> {
					String value = Optional.ofNullable(entry.getValue())
							.map(entryValue -> "\"" + encoder.encodeToString(entryValue.getBytes()) + "\"")
							.orElse("null");

					return "{\"Key\":\"" + entry.getKey() + "\",\"Value\":" + value + "}";
				})
				.collect(Collectors.joining(",")) + "]");
	}
	catch (IOException e) {
		throw new RuntimeException(e);
	}
}
 

public static String generate(String data, int height, int width) throws Exception {
    BitMatrix matrix = new MultiFormatWriter().encode(data, BarcodeFormat.QR_CODE, width, height);
    try (ByteArrayOutputStream out = new ByteArrayOutputStream()) {
        MatrixToImageWriter.writeToStream(matrix, "png", out);
        Base64.Encoder encoder = Base64.getEncoder();
        String base64Image = encoder.encodeToString(out.toByteArray());
        return "data:image/png;base64," + base64Image;
    }
}
 

/**
 * BASE64加密
 *
 * @param key
 * @return
 * @throws Exception
 */
public static String encryptBASE64(String key) {
    byte[] textByte = new byte[0];
    try {
        textByte = key.getBytes("UTF-8");
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    }
    Base64.Encoder encoder = Base64.getEncoder();
    String encodedText = encoder.encodeToString(textByte);
    return new String(encodedText);

}
 

/**
 * Update password hash using supplied password <code>String</code>.
 * <p/>
 * @param password New password to be set.
 */
public boolean setPassword(final String password) {
    boolean success = true;
    byte[] passwordBytes = null;
    MessageDigest md = null;
    try {
        passwordBytes = password.getBytes(PASSWORD_ENCODING);
        md = MessageDigest.getInstance(HASH_ALGORITHM);
    } catch (UnsupportedEncodingException uee) {
        success = false;
        LOGGER.log(Level.INFO,
                "Cannot convert password to bytes array: {0}",
                uee.getMessage());
    } catch (NoSuchAlgorithmException nae) {
        success = false;
        LOGGER.log(Level.INFO,
                "Cannot initialize message digest to produce {0}: {1}",
                new Object[] {HASH_ALGORITHM, nae.getMessage()});
    }
    if (success && passwordBytes != null && md != null) {
        Base64.Encoder b64Enc = Base64.getEncoder();
        md.reset();
        md.update(passwordBytes);
        String b64Hash = b64Enc.encodeToString(md.digest());
        if (b64Hash != null) {
            StringBuilder sb = new StringBuilder(
                    1 + HASH_ALGORITHM_GALSSFISH.length()
                    + 1 + b64Hash.length());
            sb.append(HASH_ALGORITHM_PREFIX);
            sb.append(HASH_ALGORITHM_GALSSFISH);
            sb.append(HASH_ALGORITHM_SUFFIX);
            sb.append(b64Hash);
            passwordHash = sb.toString();
        } else {
            success = false;
        }
    }
    return success;
}
 

public static String aesEncryptString(String content, String key) throws InvalidKeyException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException, UnsupportedEncodingException {
    byte[] contentBytes = content.getBytes(CHARSET);
    byte[] keyBytes = key.getBytes(CHARSET);
    byte[] encryptedBytes = aesEncryptBytes(contentBytes, keyBytes);
    Base64.Encoder encoder = Base64.getEncoder();
    return encoder.encodeToString(encryptedBytes);
}
 

public BasicAuthorizationProvider(final String username, final String password) {
    checkArgument(!username.contains(":"), "Username must not contain a colon");
    final CharsetEncoder encoder = ISO_8859_1.newEncoder();
    checkArgument(encoder.canEncode(username), "Username must be encoded in ISO-8859-1");
    checkArgument(encoder.canEncode(password), "Password must be encoded in ISO-8859-1");
    final String credentials = username + ":" + password;
    final Base64.Encoder base64 = Base64.getEncoder();
    final byte[] bytes = credentials.getBytes(ISO_8859_1);
    this.authorization = "Basic " + base64.encodeToString(bytes);
}
 

private static void testDecodeIgnoredAfterPadding() throws Throwable {
    for (byte nonBase64 : new byte[] {'#', '(', '!', '\\', '-', '_', '\n', '\r'}) {
        byte[][] src = new byte[][] {
            "A".getBytes("ascii"),
            "AB".getBytes("ascii"),
            "ABC".getBytes("ascii"),
            "ABCD".getBytes("ascii"),
            "ABCDE".getBytes("ascii")
        };
        Base64.Encoder encM = Base64.getMimeEncoder();
        Base64.Decoder decM = Base64.getMimeDecoder();
        Base64.Encoder enc = Base64.getEncoder();
        Base64.Decoder dec = Base64.getDecoder();
        for (int i = 0; i < src.length; i++) {
            // decode(byte[])
            byte[] encoded = encM.encode(src[i]);
            encoded = Arrays.copyOf(encoded, encoded.length + 1);
            encoded[encoded.length - 1] = nonBase64;
            checkEqual(decM.decode(encoded), src[i], "Non-base64 char is not ignored");
            byte[] decoded = new byte[src[i].length];
            decM.decode(encoded, decoded);
            checkEqual(decoded, src[i], "Non-base64 char is not ignored");

            try {
                dec.decode(encoded);
                throw new RuntimeException("No IAE for non-base64 char");
            } catch (IllegalArgumentException iae) {}
        }
    }
}
 

String getHTTPAuthCertificate(Enrollment enrollment, String method, String url, String body) throws Exception {
    Base64.Encoder b64 = Base64.getEncoder();
    String cert = b64.encodeToString(enrollment.getCert().getBytes(UTF_8));
    body = b64.encodeToString(body.getBytes(UTF_8));
    String signString;
    // Cache the version, so don't need to make info call everytime the same client is used
    if (newPayloadType == null) {
        newPayloadType = true;

        // If CA version is less than 1.4.0, use old payload
        String caVersion = info().getVersion();
        logger.info(format("CA Version: %s", caVersion));

        if (Utils.isNullOrEmpty(caVersion)) {
            newPayloadType = false;
        }

        String version = caVersion + ".";
        if (version.startsWith("1.1.") || version.startsWith("1.2.") || version.startsWith("1.3.")) {
            newPayloadType = false;
        }
    }

    if (newPayloadType) {
        url = addCAToURL(url);
        String file = b64.encodeToString(new URL(url).getFile().getBytes(UTF_8));
        signString = method + "." + file + "." + body + "." + cert;
    } else {
        signString = body + "." + cert;
    }

    byte[] signature = cryptoSuite.sign(enrollment.getKey(), signString.getBytes(UTF_8));
    return cert + "." + b64.encodeToString(signature);
}
 

/**
 * Encodes string.
 * @param txt string to encode
 * @return encoded string or <code>null</code> if error encoding string
 */
public static String encode(String txt) {
  txt = StringUtils.defaultIfEmpty(txt, "");
  try {
    CRC32 crC32 = new CRC32();
    crC32.update(txt.getBytes("UTF-8"));
    long crc = crC32.getValue();
    String crctxt = String.format("%10d%s", crc, txt);
    Base64.Encoder encoder = Base64.getEncoder();
    return encoder.encodeToString(crctxt.getBytes("UTF-8"));
  } catch (UnsupportedEncodingException ex) {
    return null;
  }
}
 

private static void testDecodeIgnoredAfterPadding() throws Throwable {
    for (byte nonBase64 : new byte[] {'#', '(', '!', '\\', '-', '_', '\n', '\r'}) {
        byte[][] src = new byte[][] {
            "A".getBytes("ascii"),
            "AB".getBytes("ascii"),
            "ABC".getBytes("ascii"),
            "ABCD".getBytes("ascii"),
            "ABCDE".getBytes("ascii")
        };
        Base64.Encoder encM = Base64.getMimeEncoder();
        Base64.Decoder decM = Base64.getMimeDecoder();
        Base64.Encoder enc = Base64.getEncoder();
        Base64.Decoder dec = Base64.getDecoder();
        for (int i = 0; i < src.length; i++) {
            // decode(byte[])
            byte[] encoded = encM.encode(src[i]);
            encoded = Arrays.copyOf(encoded, encoded.length + 1);
            encoded[encoded.length - 1] = nonBase64;
            checkEqual(decM.decode(encoded), src[i], "Non-base64 char is not ignored");
            byte[] decoded = new byte[src[i].length];
            decM.decode(encoded, decoded);
            checkEqual(decoded, src[i], "Non-base64 char is not ignored");

            try {
                dec.decode(encoded);
                throw new RuntimeException("No IAE for non-base64 char");
            } catch (IllegalArgumentException iae) {}
        }
    }
}
 

public static String md5(String content) {
    try {
        Base64.Encoder encoder = Base64.getEncoder();
        return encoder.encodeToString(md5(content.getBytes()));
    } catch (Exception e) {
        return null;
    }
}
 

private static String encodeCertificate(Certificate certificate) {
    try {
        Base64.Encoder encoder = Base64.getEncoder();
        byte[] rawCrtText = certificate.getEncoded();
        return new String(encoder.encode(rawCrtText));
    } catch(CertificateEncodingException e) {
        return null;
    }
}
 

public String getCredentialsBase64() {
    Base64.Encoder encoder = Base64.getEncoder();
    return encoder.encodeToString((this.username + ":" + this.password).getBytes());
}
 

private String encode(byte[] data) {
    Encoder encoder = Base64.getEncoder();
    return encoder.encodeToString(data);
}
 

public void testRoundtrip_wrap_basic() throws Exception {
    Encoder encoder = Base64.getEncoder();
    Decoder decoder = Base64.getDecoder();
    checkRoundTrip_wrapInputStream(encoder, decoder);
}
 

@Override
public byte[] modifyBytes(byte[] input) {
    Base64.Encoder encoder = Base64.getEncoder();
    return encoder.encode(input);
}
 

@Bean
public Base64.Encoder base64Encoder() {
    return Base64.getEncoder();
}
 

private static String buildCredentials(String user, String password) {
    Base64.Encoder x = Base64.getEncoder();
    String credentials = String.join(":", user, password);
    return new String(x.encode(credentials.getBytes()));
}