http://git-wip-us.apache.org/repos/asf/nifi/blob/7d242076/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/util/crypto/PBKDF2CipherProvider.java ---------------------------------------------------------------------- diff --git a/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/util/crypto/PBKDF2CipherProvider.java b/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/util/crypto/PBKDF2CipherProvider.java deleted file mode 100644 index ee8d5d3..0000000 --- a/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/util/crypto/PBKDF2CipherProvider.java +++ /dev/null @@ -1,201 +0,0 @@ -/* - * Licensed to the Apache Software Foundation (ASF) under one or more - * contributor license agreements. See the NOTICE file distributed with - * this work for additional information regarding copyright ownership. - * The ASF licenses this file to You under the Apache License, Version 2.0 - * (the "License"); you may not use this file except in compliance with - * the License. You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ -package org.apache.nifi.processors.standard.util.crypto; - -import org.apache.commons.lang3.StringUtils; -import org.apache.nifi.processor.exception.ProcessException; -import org.apache.nifi.security.util.EncryptionMethod; -import org.bouncycastle.crypto.Digest; -import org.bouncycastle.crypto.digests.MD5Digest; -import org.bouncycastle.crypto.digests.SHA1Digest; -import org.bouncycastle.crypto.digests.SHA256Digest; -import org.bouncycastle.crypto.digests.SHA384Digest; -import org.bouncycastle.crypto.digests.SHA512Digest; -import org.bouncycastle.crypto.generators.PKCS5S2ParametersGenerator; -import org.bouncycastle.crypto.params.KeyParameter; -import org.slf4j.Logger; -import org.slf4j.LoggerFactory; - -import javax.crypto.Cipher; -import javax.crypto.SecretKey; -import javax.crypto.spec.SecretKeySpec; -import java.nio.charset.StandardCharsets; -import java.security.SecureRandom; - -public class PBKDF2CipherProvider extends RandomIVPBECipherProvider { - private static final Logger logger = LoggerFactory.getLogger(PBKDF2CipherProvider.class); - private static final int DEFAULT_SALT_LENGTH = 16; - - private final int iterationCount; - private final Digest prf; - - private static final String DEFAULT_PRF = "SHA-512"; - /** - * This can be calculated automatically using the code {@see PBKDF2CipherProviderGroovyTest#calculateMinimumIterationCount} or manually updated by a maintainer - */ - private static final int DEFAULT_ITERATION_COUNT = 160_000; - - /** - * Instantiates a PBKDF2 cipher provider with the default number of iterations and the default PRF. Currently 128,000 iterations and SHA-512. - */ - public PBKDF2CipherProvider() { - this(DEFAULT_PRF, DEFAULT_ITERATION_COUNT); - } - - /** - * Instantiates a PBKDF2 cipher provider with the specified number of iterations and the specified PRF. Currently supports MD5, SHA1, SHA256, SHA384, and SHA512. Unknown PRFs will default to - * SHA512. - * - * @param prf a String representation of the PRF name, e.g. "SHA256", "SHA-384" "sha_512" - * @param iterationCount the number of iterations - */ - public PBKDF2CipherProvider(String prf, int iterationCount) { - this.iterationCount = iterationCount; - if (iterationCount < DEFAULT_ITERATION_COUNT) { - logger.warn("The provided iteration count {} is below the recommended minimum {}", iterationCount, DEFAULT_ITERATION_COUNT); - } - this.prf = resolvePRF(prf); - } - - /** - * Returns an initialized cipher for the specified algorithm. The key is derived by the KDF of the implementation. The IV is provided externally to allow for non-deterministic IVs, as IVs - * deterministically derived from the password are a potential vulnerability and compromise semantic security. See - * <a href="http://crypto.stackexchange.com/a/3970/12569";>Ilmari Karonen's answer on Crypto Stack Exchange</a> - * - * @param encryptionMethod the {@link EncryptionMethod} - * @param password the secret input - * @param salt the salt - * @param iv the IV - * @param keyLength the desired key length in bits - * @param encryptMode true for encrypt, false for decrypt - * @return the initialized cipher - * @throws Exception if there is a problem initializing the cipher - */ - @Override - public Cipher getCipher(EncryptionMethod encryptionMethod, String password, byte[] salt, byte[] iv, int keyLength, boolean encryptMode) throws Exception { - try { - return getInitializedCipher(encryptionMethod, password, salt, iv, keyLength, encryptMode); - } catch (IllegalArgumentException e) { - throw e; - } catch (Exception e) { - throw new ProcessException("Error initializing the cipher", e); - } - } - - @Override - Logger getLogger() { - return logger; - } - - /** - * Returns an initialized cipher for the specified algorithm. The key (and IV if necessary) are derived by the KDF of the implementation. - * - * The IV can be retrieved by the calling method using {@link Cipher#getIV()}. - * - * @param encryptionMethod the {@link EncryptionMethod} - * @param password the secret input - * @param salt the salt - * @param keyLength the desired key length in bits - * @param encryptMode true for encrypt, false for decrypt - * @return the initialized cipher - * @throws Exception if there is a problem initializing the cipher - */ - @Override - public Cipher getCipher(EncryptionMethod encryptionMethod, String password, byte[] salt, int keyLength, boolean encryptMode) throws Exception { - return getCipher(encryptionMethod, password, salt, new byte[0], keyLength, encryptMode); - } - - protected Cipher getInitializedCipher(EncryptionMethod encryptionMethod, String password, byte[] salt, byte[] iv, int keyLength, boolean encryptMode) throws Exception { - if (encryptionMethod == null) { - throw new IllegalArgumentException("The encryption method must be specified"); - } - - if (!encryptionMethod.isCompatibleWithStrongKDFs()) { - throw new IllegalArgumentException(encryptionMethod.name() + " is not compatible with PBKDF2"); - } - - String algorithm = encryptionMethod.getAlgorithm(); - - final String cipherName = CipherUtility.parseCipherFromAlgorithm(algorithm); - if (!CipherUtility.isValidKeyLength(keyLength, cipherName)) { - throw new IllegalArgumentException(String.valueOf(keyLength) + " is not a valid key length for " + cipherName); - } - - if (StringUtils.isEmpty(password)) { - throw new IllegalArgumentException("Encryption with an empty password is not supported"); - } - - if (salt == null || salt.length < DEFAULT_SALT_LENGTH) { - throw new IllegalArgumentException("The salt must be at least " + DEFAULT_SALT_LENGTH + " bytes. To generate a salt, use PBKDF2CipherProvider#generateSalt()"); - } - - PKCS5S2ParametersGenerator gen = new PKCS5S2ParametersGenerator(this.prf); - gen.init(password.getBytes(StandardCharsets.UTF_8), salt, getIterationCount()); - byte[] dk = ((KeyParameter) gen.generateDerivedParameters(keyLength)).getKey(); - SecretKey tempKey = new SecretKeySpec(dk, algorithm); - - KeyedCipherProvider keyedCipherProvider = new AESKeyedCipherProvider(); - return keyedCipherProvider.getCipher(encryptionMethod, tempKey, iv, encryptMode); - } - - @Override - public byte[] generateSalt() { - byte[] salt = new byte[DEFAULT_SALT_LENGTH]; - new SecureRandom().nextBytes(salt); - return salt; - } - - @Override - public int getDefaultSaltLength() { - return DEFAULT_SALT_LENGTH; - } - - protected int getIterationCount() { - return iterationCount; - } - - protected String getPRFName() { - if (prf != null) { - return prf.getAlgorithmName(); - } else { - return "No PRF enabled"; - } - } - - private Digest resolvePRF(final String prf) { - if (StringUtils.isEmpty(prf)) { - throw new IllegalArgumentException("Cannot resolve empty PRF"); - } - String formattedPRF = prf.toLowerCase().replaceAll("[\\W]+", ""); - logger.debug("Resolved PRF {} to {}", prf, formattedPRF); - switch (formattedPRF) { - case "md5": - return new MD5Digest(); - case "sha1": - return new SHA1Digest(); - case "sha384": - return new SHA384Digest(); - case "sha256": - return new SHA256Digest(); - case "sha512": - return new SHA512Digest(); - default: - logger.warn("Could not resolve PRF {}. Using default PRF {} instead", prf, DEFAULT_PRF); - return new SHA512Digest(); - } - } -}
http://git-wip-us.apache.org/repos/asf/nifi/blob/7d242076/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/util/crypto/PasswordBasedEncryptor.java ---------------------------------------------------------------------- diff --git a/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/util/crypto/PasswordBasedEncryptor.java b/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/util/crypto/PasswordBasedEncryptor.java deleted file mode 100644 index eed5925..0000000 --- a/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/util/crypto/PasswordBasedEncryptor.java +++ /dev/null @@ -1,193 +0,0 @@ -/* - * Licensed to the Apache Software Foundation (ASF) under one or more - * contributor license agreements. See the NOTICE file distributed with - * this work for additional information regarding copyright ownership. - * The ASF licenses this file to You under the Apache License, Version 2.0 - * (the "License"); you may not use this file except in compliance with - * the License. You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ -package org.apache.nifi.processors.standard.util.crypto; - -import org.apache.commons.lang3.StringUtils; -import org.apache.nifi.processor.exception.ProcessException; -import org.apache.nifi.processor.io.StreamCallback; -import org.apache.nifi.processors.standard.EncryptContent.Encryptor; -import org.apache.nifi.security.util.EncryptionMethod; -import org.apache.nifi.security.util.KeyDerivationFunction; - -import javax.crypto.Cipher; -import javax.crypto.spec.PBEKeySpec; -import java.io.EOFException; -import java.io.IOException; -import java.io.InputStream; -import java.io.OutputStream; -import java.security.NoSuchAlgorithmException; - -public class PasswordBasedEncryptor implements Encryptor { - - private EncryptionMethod encryptionMethod; - private PBEKeySpec password; - private KeyDerivationFunction kdf; - - private static final int DEFAULT_MAX_ALLOWED_KEY_LENGTH = 128; - private static final int MINIMUM_SAFE_PASSWORD_LENGTH = 10; - - private static boolean isUnlimitedStrengthCryptographyEnabled; - - // Evaluate an unlimited strength algorithm to determine if we support the capability we have on the system - static { - try { - isUnlimitedStrengthCryptographyEnabled = (Cipher.getMaxAllowedKeyLength("AES") > DEFAULT_MAX_ALLOWED_KEY_LENGTH); - } catch (NoSuchAlgorithmException e) { - // if there are issues with this, we default back to the value established - isUnlimitedStrengthCryptographyEnabled = false; - } - } - - public PasswordBasedEncryptor(final EncryptionMethod encryptionMethod, final char[] password, KeyDerivationFunction kdf) { - super(); - try { - if (encryptionMethod == null) { - throw new IllegalArgumentException("Cannot initialize password-based encryptor with null encryption method"); - } - this.encryptionMethod = encryptionMethod; - if (kdf == null || kdf.equals(KeyDerivationFunction.NONE)) { - throw new IllegalArgumentException("Cannot initialize password-based encryptor with null KDF"); - } - this.kdf = kdf; - if (password == null || password.length == 0) { - throw new IllegalArgumentException("Cannot initialize password-based encryptor with empty password"); - } - this.password = new PBEKeySpec(password); - } catch (Exception e) { - throw new ProcessException(e); - } - } - - public static int getMaxAllowedKeyLength(final String algorithm) { - if (StringUtils.isEmpty(algorithm)) { - return DEFAULT_MAX_ALLOWED_KEY_LENGTH; - } - String parsedCipher = CipherUtility.parseCipherFromAlgorithm(algorithm); - try { - return Cipher.getMaxAllowedKeyLength(parsedCipher); - } catch (NoSuchAlgorithmException e) { - // Default algorithm max key length on unmodified JRE - return DEFAULT_MAX_ALLOWED_KEY_LENGTH; - } - } - - /** - * Returns a recommended minimum length for passwords. This can be modified over time and does not take full entropy calculations (patterns, character space, etc.) into account. - * - * @return the minimum safe password length - */ - public static int getMinimumSafePasswordLength() { - return MINIMUM_SAFE_PASSWORD_LENGTH; - } - - public static boolean supportsUnlimitedStrength() { - return isUnlimitedStrengthCryptographyEnabled; - } - - @Override - public StreamCallback getEncryptionCallback() throws ProcessException { - return new EncryptCallback(); - } - - @Override - public StreamCallback getDecryptionCallback() throws ProcessException { - return new DecryptCallback(); - } - - private class DecryptCallback implements StreamCallback { - - public DecryptCallback() { - } - - @Override - public void process(final InputStream in, final OutputStream out) throws IOException { - // Initialize cipher provider - PBECipherProvider cipherProvider = (PBECipherProvider) CipherProviderFactory.getCipherProvider(kdf); - - // Read salt - byte[] salt; - try { - // NiFi legacy code determined the salt length based on the cipher block size - if (cipherProvider instanceof NiFiLegacyCipherProvider) { - salt = ((NiFiLegacyCipherProvider) cipherProvider).readSalt(encryptionMethod, in); - } else { - salt = cipherProvider.readSalt(in); - } - } catch (final EOFException e) { - throw new ProcessException("Cannot decrypt because file size is smaller than salt size", e); - } - - // Determine necessary key length - int keyLength = CipherUtility.parseKeyLengthFromAlgorithm(encryptionMethod.getAlgorithm()); - - // Generate cipher - try { - Cipher cipher; - // Read IV if necessary - if (cipherProvider instanceof RandomIVPBECipherProvider) { - RandomIVPBECipherProvider rivpcp = (RandomIVPBECipherProvider) cipherProvider; - byte[] iv = rivpcp.readIV(in); - cipher = rivpcp.getCipher(encryptionMethod, new String(password.getPassword()), salt, iv, keyLength, false); - } else { - cipher = cipherProvider.getCipher(encryptionMethod, new String(password.getPassword()), salt, keyLength, false); - } - CipherUtility.processStreams(cipher, in, out); - } catch (Exception e) { - throw new ProcessException(e); - } - } - } - - private class EncryptCallback implements StreamCallback { - - public EncryptCallback() { - } - - @Override - public void process(final InputStream in, final OutputStream out) throws IOException { - // Initialize cipher provider - PBECipherProvider cipherProvider = (PBECipherProvider) CipherProviderFactory.getCipherProvider(kdf); - - // Generate salt - byte[] salt; - // NiFi legacy code determined the salt length based on the cipher block size - if (cipherProvider instanceof NiFiLegacyCipherProvider) { - salt = ((NiFiLegacyCipherProvider) cipherProvider).generateSalt(encryptionMethod); - } else { - salt = cipherProvider.generateSalt(); - } - - // Write to output stream - cipherProvider.writeSalt(salt, out); - - // Determine necessary key length - int keyLength = CipherUtility.parseKeyLengthFromAlgorithm(encryptionMethod.getAlgorithm()); - - // Generate cipher - try { - Cipher cipher = cipherProvider.getCipher(encryptionMethod, new String(password.getPassword()), salt, keyLength, true); - // Write IV if necessary - if (cipherProvider instanceof RandomIVPBECipherProvider) { - ((RandomIVPBECipherProvider) cipherProvider).writeIV(cipher.getIV(), out); - } - CipherUtility.processStreams(cipher, in, out); - } catch (Exception e) { - throw new ProcessException(e); - } - } - } -} \ No newline at end of file http://git-wip-us.apache.org/repos/asf/nifi/blob/7d242076/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/util/crypto/RandomIVPBECipherProvider.java ---------------------------------------------------------------------- diff --git a/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/util/crypto/RandomIVPBECipherProvider.java b/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/util/crypto/RandomIVPBECipherProvider.java deleted file mode 100644 index 903dfac..0000000 --- a/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/util/crypto/RandomIVPBECipherProvider.java +++ /dev/null @@ -1,71 +0,0 @@ -/* - * Licensed to the Apache Software Foundation (ASF) under one or more - * contributor license agreements. See the NOTICE file distributed with - * this work for additional information regarding copyright ownership. - * The ASF licenses this file to You under the Apache License, Version 2.0 - * (the "License"); you may not use this file except in compliance with - * the License. You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ -package org.apache.nifi.processors.standard.util.crypto; - -import org.apache.nifi.processor.exception.ProcessException; -import org.apache.nifi.security.util.EncryptionMethod; -import org.slf4j.Logger; - -import javax.crypto.Cipher; -import java.io.IOException; -import java.io.InputStream; -import java.io.OutputStream; -import java.nio.charset.StandardCharsets; - -public abstract class RandomIVPBECipherProvider implements PBECipherProvider { - static final byte[] SALT_DELIMITER = "NiFiSALT".getBytes(StandardCharsets.UTF_8); - static final int MAX_SALT_LIMIT = 128; - static final byte[] IV_DELIMITER = "NiFiIV".getBytes(StandardCharsets.UTF_8); - // This is 16 bytes for AES but can vary for other ciphers - static final int MAX_IV_LIMIT = 16; - - /** - * Returns an initialized cipher for the specified algorithm. The key is derived by the KDF of the implementation. The IV is provided externally to allow for non-deterministic IVs, as IVs - * deterministically derived from the password are a potential vulnerability and compromise semantic security. See - * <a href="http://crypto.stackexchange.com/a/3970/12569";>Ilmari Karonen's answer on Crypto Stack Exchange</a> - * - * @param encryptionMethod the {@link EncryptionMethod} - * @param password the secret input - * @param salt the salt - * @param iv the IV - * @param keyLength the desired key length in bits - * @param encryptMode true for encrypt, false for decrypt - * @return the initialized cipher - * @throws Exception if there is a problem initializing the cipher - */ - abstract Cipher getCipher(EncryptionMethod encryptionMethod, String password, byte[] salt, byte[] iv, int keyLength, boolean encryptMode) throws Exception; - - abstract Logger getLogger(); - - @Override - public byte[] readSalt(InputStream in) throws IOException, ProcessException { - return CipherUtility.readBytesFromInputStream(in, "salt", MAX_SALT_LIMIT, SALT_DELIMITER); - } - - @Override - public void writeSalt(byte[] salt, OutputStream out) throws IOException { - CipherUtility.writeBytesToOutputStream(out, salt, "salt", SALT_DELIMITER); - } - - public byte[] readIV(InputStream in) throws IOException, ProcessException { - return CipherUtility.readBytesFromInputStream(in, "IV", MAX_IV_LIMIT, IV_DELIMITER); - } - - public void writeIV(byte[] iv, OutputStream out) throws IOException { - CipherUtility.writeBytesToOutputStream(out, iv, "IV", IV_DELIMITER); - } -} http://git-wip-us.apache.org/repos/asf/nifi/blob/7d242076/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/util/crypto/ScryptCipherProvider.java ---------------------------------------------------------------------- diff --git a/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/util/crypto/ScryptCipherProvider.java b/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/util/crypto/ScryptCipherProvider.java deleted file mode 100644 index 15a29e2..0000000 --- a/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/util/crypto/ScryptCipherProvider.java +++ /dev/null @@ -1,286 +0,0 @@ -/* - * Licensed to the Apache Software Foundation (ASF) under one or more - * contributor license agreements. See the NOTICE file distributed with - * this work for additional information regarding copyright ownership. - * The ASF licenses this file to You under the Apache License, Version 2.0 - * (the "License"); you may not use this file except in compliance with - * the License. You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ -package org.apache.nifi.processors.standard.util.crypto; - -import org.apache.commons.codec.DecoderException; -import org.apache.commons.codec.binary.Base64; -import org.apache.commons.codec.binary.Hex; -import org.apache.commons.lang3.StringUtils; -import org.apache.nifi.processor.exception.ProcessException; -import org.apache.nifi.processors.standard.util.crypto.scrypt.Scrypt; -import org.apache.nifi.security.util.EncryptionMethod; -import org.slf4j.Logger; -import org.slf4j.LoggerFactory; - -import javax.crypto.Cipher; -import javax.crypto.SecretKey; -import javax.crypto.spec.SecretKeySpec; -import java.nio.charset.StandardCharsets; -import java.security.SecureRandom; -import java.util.ArrayList; -import java.util.List; -import java.util.regex.Matcher; -import java.util.regex.Pattern; - -public class ScryptCipherProvider extends RandomIVPBECipherProvider { - private static final Logger logger = LoggerFactory.getLogger(ScryptCipherProvider.class); - - private final int n; - private final int r; - private final int p; - /** - * These values can be calculated automatically using the code {@see ScryptCipherProviderGroovyTest#calculateMinimumParameters} or manually updated by a maintainer - */ - private static final int DEFAULT_N = Double.valueOf(Math.pow(2, 14)).intValue(); - private static final int DEFAULT_R = 8; - private static final int DEFAULT_P = 1; - - private static final Pattern SCRYPT_SALT_FORMAT = Pattern.compile("^\\$s0\\$[a-f0-9]{5,16}\\$[\\w\\/\\.]{12,44}"); - private static final Pattern MCRYPT_SALT_FORMAT = Pattern.compile("^\\$\\d+\\$\\d+\\$\\d+\\$[a-f0-9]{16,64}"); - - /** - * Instantiates a Scrypt cipher provider with the default parameters N=2^14, r=8, p=1. - */ - public ScryptCipherProvider() { - this(DEFAULT_N, DEFAULT_R, DEFAULT_P); - } - - /** - * Instantiates a Scrypt cipher provider with the specified N, r, p values. - * - * @param n the number of iterations - * @param r the block size in bytes - * @param p the parallelization factor - */ - public ScryptCipherProvider(int n, int r, int p) { - this.n = n; - this.r = r; - this.p = p; - if (n < DEFAULT_N) { - logger.warn("The provided iteration count {} is below the recommended minimum {}", n, DEFAULT_N); - } - if (r < DEFAULT_R) { - logger.warn("The provided block size {} is below the recommended minimum {}", r, DEFAULT_R); - } - if (p < DEFAULT_P) { - logger.warn("The provided parallelization factor {} is below the recommended minimum {}", p, DEFAULT_P); - } - } - - /** - * Returns an initialized cipher for the specified algorithm. The key is derived by the KDF of the implementation. The IV is provided externally to allow for non-deterministic IVs, as IVs - * deterministically derived from the password are a potential vulnerability and compromise semantic security. See - * <a href="http://crypto.stackexchange.com/a/3970/12569";>Ilmari Karonen's answer on Crypto Stack Exchange</a> - * - * @param encryptionMethod the {@link EncryptionMethod} - * @param password the secret input - * @param salt the complete salt (e.g. {@code "$2a$10$gUVbkVzp79H8YaCOsCVZNu".getBytes(StandardCharsets.UTF_8)}) - * @param iv the IV - * @param keyLength the desired key length in bits - * @param encryptMode true for encrypt, false for decrypt - * @return the initialized cipher - * @throws Exception if there is a problem initializing the cipher - */ - @Override - public Cipher getCipher(EncryptionMethod encryptionMethod, String password, byte[] salt, byte[] iv, int keyLength, boolean encryptMode) throws Exception { - try { - return getInitializedCipher(encryptionMethod, password, salt, iv, keyLength, encryptMode); - } catch (IllegalArgumentException e) { - throw e; - } catch (Exception e) { - throw new ProcessException("Error initializing the cipher", e); - } - } - - @Override - Logger getLogger() { - return logger; - } - - /** - * Returns an initialized cipher for the specified algorithm. The key (and IV if necessary) are derived by the KDF of the implementation. - * - * The IV can be retrieved by the calling method using {@link Cipher#getIV()}. - * - * @param encryptionMethod the {@link EncryptionMethod} - * @param password the secret input - * @param salt the complete salt (e.g. {@code "$s0$20101$gUVbkVzp79H8YaCOsCVZNu".getBytes(StandardCharsets.UTF_8)}) - * @param keyLength the desired key length in bits - * @param encryptMode true for encrypt, false for decrypt - * @return the initialized cipher - * @throws Exception if there is a problem initializing the cipher - */ - @Override - public Cipher getCipher(EncryptionMethod encryptionMethod, String password, byte[] salt, int keyLength, boolean encryptMode) throws Exception { - return getCipher(encryptionMethod, password, salt, new byte[0], keyLength, encryptMode); - } - - protected Cipher getInitializedCipher(EncryptionMethod encryptionMethod, String password, byte[] salt, byte[] iv, int keyLength, boolean encryptMode) throws Exception { - if (encryptionMethod == null) { - throw new IllegalArgumentException("The encryption method must be specified"); - } - if (!encryptionMethod.isCompatibleWithStrongKDFs()) { - throw new IllegalArgumentException(encryptionMethod.name() + " is not compatible with Scrypt"); - } - - if (StringUtils.isEmpty(password)) { - throw new IllegalArgumentException("Encryption with an empty password is not supported"); - } - - String algorithm = encryptionMethod.getAlgorithm(); - - final String cipherName = CipherUtility.parseCipherFromAlgorithm(algorithm); - if (!CipherUtility.isValidKeyLength(keyLength, cipherName)) { - throw new IllegalArgumentException(String.valueOf(keyLength) + " is not a valid key length for " + cipherName); - } - - String scryptSalt = formatSaltForScrypt(salt); - List<Integer> params = new ArrayList<>(3); - byte[] rawSalt = new byte[Scrypt.getDefaultSaltLength()]; - - parseSalt(scryptSalt, rawSalt, params); - - String hash = Scrypt.scrypt(password, rawSalt, params.get(0), params.get(1), params.get(2), keyLength); - - // Split out the derived key from the hash and form a key object - final String[] hashComponents = hash.split("\\$"); - final int HASH_INDEX = 4; - if (hashComponents.length < HASH_INDEX) { - throw new ProcessException("There was an error generating a scrypt hash -- the resulting hash was not properly formatted"); - } - byte[] keyBytes = Base64.decodeBase64(hashComponents[HASH_INDEX]); - SecretKey tempKey = new SecretKeySpec(keyBytes, algorithm); - - KeyedCipherProvider keyedCipherProvider = new AESKeyedCipherProvider(); - return keyedCipherProvider.getCipher(encryptionMethod, tempKey, iv, encryptMode); - } - - private void parseSalt(String scryptSalt, byte[] rawSalt, List<Integer> params) { - if (StringUtils.isEmpty(scryptSalt)) { - throw new IllegalArgumentException("Cannot parse empty salt"); - } - - /** Salt format is $s0$params$saltB64 where params is encoded according to - * {@link Scrypt#parseParameters(String)}*/ - final String[] saltComponents = scryptSalt.split("\\$"); - if (saltComponents.length < 4) { - throw new IllegalArgumentException("Could not parse salt"); - } - byte[] salt = Base64.decodeBase64(saltComponents[3]); - if (rawSalt.length < salt.length) { - byte[] tempBytes = new byte[salt.length]; - System.arraycopy(rawSalt, 0, tempBytes, 0, rawSalt.length); - rawSalt = tempBytes; - } - System.arraycopy(salt, 0, rawSalt, 0, salt.length); - - if (params == null) { - params = new ArrayList<>(3); - } - params.addAll(Scrypt.parseParameters(saltComponents[2])); - } - - /** - * Formats the salt into a string which Scrypt can understand containing the N, r, p values along with the salt value. If the provided salt contains all values, the response will be unchanged. - * If it only contains the raw salt value, the resulting return value will also include the current instance version, N, r, and p. - * - * @param salt the provided salt - * @return the properly-formatted and complete salt - */ - private String formatSaltForScrypt(byte[] salt) { - if (salt == null || salt.length == 0) { - throw new IllegalArgumentException("The salt cannot be empty. To generate a salt, use ScryptCipherProvider#generateSalt()"); - } - - String saltString = new String(salt, StandardCharsets.UTF_8); - Matcher matcher = SCRYPT_SALT_FORMAT.matcher(saltString); - - if (matcher.find()) { - return saltString; - } else { - if (saltString.startsWith("$")) { - logger.warn("Salt starts with $ but is not valid scrypt salt"); - matcher = MCRYPT_SALT_FORMAT.matcher(saltString); - if (matcher.find()) { - logger.warn("The salt appears to be of the modified mcrypt format. Use ScryptCipherProvider#translateSalt(mcryptSalt) to form a valid salt"); - return translateSalt(saltString); - } - - logger.info("Salt is not modified mcrypt format"); - } - logger.info("Treating as raw salt bytes"); - - // Ensure the length of the salt - int saltLength = salt.length; - if (saltLength < 8 || saltLength > 32) { - throw new IllegalArgumentException("The raw salt must be between 8 and 32 bytes"); - } - return Scrypt.formatSalt(salt, n, r, p); - } - } - - /** - * Translates a salt from the mcrypt format {@code $n$r$p$salt_hex} to the Java scrypt format {@code $s0$params$saltBase64}. - * - * @param mcryptSalt the mcrypt-formatted salt string - * @return the formatted salt to use with Java Scrypt - */ - public String translateSalt(String mcryptSalt) { - if (StringUtils.isEmpty(mcryptSalt)) { - throw new IllegalArgumentException("Cannot translate empty salt"); - } - - // Format should be $n$r$p$saltHex - Matcher matcher = MCRYPT_SALT_FORMAT.matcher(mcryptSalt); - if (!matcher.matches()) { - throw new IllegalArgumentException("Salt is not valid mcrypt format of $n$r$p$saltHex"); - } - - String[] components = mcryptSalt.split("\\$"); - try { - return Scrypt.formatSalt(Hex.decodeHex(components[4].toCharArray()), Integer.valueOf(components[1]), Integer.valueOf(components[2]), Integer.valueOf(components[3])); - } catch (DecoderException e) { - final String msg = "Mcrypt salt was not properly hex-encoded"; - logger.warn(msg); - throw new IllegalArgumentException(msg); - } - } - - @Override - public byte[] generateSalt() { - byte[] salt = new byte[Scrypt.getDefaultSaltLength()]; - new SecureRandom().nextBytes(salt); - return Scrypt.formatSalt(salt, n, r, p).getBytes(StandardCharsets.UTF_8); - } - - @Override - public int getDefaultSaltLength() { - return Scrypt.getDefaultSaltLength(); - } - - protected int getN() { - return n; - } - - protected int getR() { - return r; - } - - protected int getP() { - return p; - } -} http://git-wip-us.apache.org/repos/asf/nifi/blob/7d242076/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/util/crypto/bcrypt/BCrypt.java ---------------------------------------------------------------------- diff --git a/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/util/crypto/bcrypt/BCrypt.java b/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/util/crypto/bcrypt/BCrypt.java deleted file mode 100644 index a578917..0000000 --- a/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/util/crypto/bcrypt/BCrypt.java +++ /dev/null @@ -1,789 +0,0 @@ -// Copyright (c) 2006 Damien Miller <[email protected]> -// -// Permission to use, copy, modify, and distribute this software for any -// purpose with or without fee is hereby granted, provided that the above -// copyright notice and this permission notice appear in all copies. -// -// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES -// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF -// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR -// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES -// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN -// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF -// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - -package org.apache.nifi.processors.standard.util.crypto.bcrypt; - -import java.io.UnsupportedEncodingException; -import java.security.SecureRandom; - -/** - * BCrypt implements OpenBSD-style Blowfish password hashing using - * the scheme described in "A Future-Adaptable Password Scheme" by - * Niels Provos and David Mazieres. - * <p/> - * This password hashing system tries to thwart off-line password - * cracking using a computationally-intensive hashing algorithm, - * based on Bruce Schneier's Blowfish cipher. The work factor of - * the algorithm is parametrized, so it can be increased as - * computers get faster. - * <p/> - * Usage is really simple. To hash a password for the first time, - * call the hashpw method with a random salt, like this: - * <p/> - * <code> - * String pw_hash = BCrypt.hashpw(plain_password, BCrypt.gensalt()); - * </code> - * <p/> - * To check whether a plaintext password matches one that has been - * hashed previously, use the checkpw method: - * <p/> - * <code> - * if (BCrypt.checkpw(candidate_password, stored_hash)) - * System.out.println("It matches"); - * else - * System.out.println("It does not match"); - * </code> - * <p/> - * The gensalt() method takes an optional parameter (log_rounds) - * that determines the computational complexity of the hashing: - * <p/> - * <code> - * String strong_salt = BCrypt.gensalt(10) - * String stronger_salt = BCrypt.gensalt(12) - * </code> - * <p/> - * The amount of work increases exponentially (2**log_rounds), so - * each increment is twice as much work. The default log_rounds is - * 10, and the valid range is 4 to 30. - * - * @author Damien Miller - * @version 0.4 - */ -public class BCrypt { - // BCrypt parameters - private static final int GENSALT_DEFAULT_LOG2_ROUNDS = 10; - private static final int BCRYPT_SALT_LEN = 16; - - // Blowfish parameters - private static final int BLOWFISH_NUM_ROUNDS = 16; - - // Initial contents of key schedule - private static final int P_orig[] = { - 0x243f6a88, 0x85a308d3, 0x13198a2e, 0x03707344, - 0xa4093822, 0x299f31d0, 0x082efa98, 0xec4e6c89, - 0x452821e6, 0x38d01377, 0xbe5466cf, 0x34e90c6c, - 0xc0ac29b7, 0xc97c50dd, 0x3f84d5b5, 0xb5470917, - 0x9216d5d9, 0x8979fb1b - }; - private static final int S_orig[] = { - 0xd1310ba6, 0x98dfb5ac, 0x2ffd72db, 0xd01adfb7, - 0xb8e1afed, 0x6a267e96, 0xba7c9045, 0xf12c7f99, - 0x24a19947, 0xb3916cf7, 0x0801f2e2, 0x858efc16, - 0x636920d8, 0x71574e69, 0xa458fea3, 0xf4933d7e, - 0x0d95748f, 0x728eb658, 0x718bcd58, 0x82154aee, - 0x7b54a41d, 0xc25a59b5, 0x9c30d539, 0x2af26013, - 0xc5d1b023, 0x286085f0, 0xca417918, 0xb8db38ef, - 0x8e79dcb0, 0x603a180e, 0x6c9e0e8b, 0xb01e8a3e, - 0xd71577c1, 0xbd314b27, 0x78af2fda, 0x55605c60, - 0xe65525f3, 0xaa55ab94, 0x57489862, 0x63e81440, - 0x55ca396a, 0x2aab10b6, 0xb4cc5c34, 0x1141e8ce, - 0xa15486af, 0x7c72e993, 0xb3ee1411, 0x636fbc2a, - 0x2ba9c55d, 0x741831f6, 0xce5c3e16, 0x9b87931e, - 0xafd6ba33, 0x6c24cf5c, 0x7a325381, 0x28958677, - 0x3b8f4898, 0x6b4bb9af, 0xc4bfe81b, 0x66282193, - 0x61d809cc, 0xfb21a991, 0x487cac60, 0x5dec8032, - 0xef845d5d, 0xe98575b1, 0xdc262302, 0xeb651b88, - 0x23893e81, 0xd396acc5, 0x0f6d6ff3, 0x83f44239, - 0x2e0b4482, 0xa4842004, 0x69c8f04a, 0x9e1f9b5e, - 0x21c66842, 0xf6e96c9a, 0x670c9c61, 0xabd388f0, - 0x6a51a0d2, 0xd8542f68, 0x960fa728, 0xab5133a3, - 0x6eef0b6c, 0x137a3be4, 0xba3bf050, 0x7efb2a98, - 0xa1f1651d, 0x39af0176, 0x66ca593e, 0x82430e88, - 0x8cee8619, 0x456f9fb4, 0x7d84a5c3, 0x3b8b5ebe, - 0xe06f75d8, 0x85c12073, 0x401a449f, 0x56c16aa6, - 0x4ed3aa62, 0x363f7706, 0x1bfedf72, 0x429b023d, - 0x37d0d724, 0xd00a1248, 0xdb0fead3, 0x49f1c09b, - 0x075372c9, 0x80991b7b, 0x25d479d8, 0xf6e8def7, - 0xe3fe501a, 0xb6794c3b, 0x976ce0bd, 0x04c006ba, - 0xc1a94fb6, 0x409f60c4, 0x5e5c9ec2, 0x196a2463, - 0x68fb6faf, 0x3e6c53b5, 0x1339b2eb, 0x3b52ec6f, - 0x6dfc511f, 0x9b30952c, 0xcc814544, 0xaf5ebd09, - 0xbee3d004, 0xde334afd, 0x660f2807, 0x192e4bb3, - 0xc0cba857, 0x45c8740f, 0xd20b5f39, 0xb9d3fbdb, - 0x5579c0bd, 0x1a60320a, 0xd6a100c6, 0x402c7279, - 0x679f25fe, 0xfb1fa3cc, 0x8ea5e9f8, 0xdb3222f8, - 0x3c7516df, 0xfd616b15, 0x2f501ec8, 0xad0552ab, - 0x323db5fa, 0xfd238760, 0x53317b48, 0x3e00df82, - 0x9e5c57bb, 0xca6f8ca0, 0x1a87562e, 0xdf1769db, - 0xd542a8f6, 0x287effc3, 0xac6732c6, 0x8c4f5573, - 0x695b27b0, 0xbbca58c8, 0xe1ffa35d, 0xb8f011a0, - 0x10fa3d98, 0xfd2183b8, 0x4afcb56c, 0x2dd1d35b, - 0x9a53e479, 0xb6f84565, 0xd28e49bc, 0x4bfb9790, - 0xe1ddf2da, 0xa4cb7e33, 0x62fb1341, 0xcee4c6e8, - 0xef20cada, 0x36774c01, 0xd07e9efe, 0x2bf11fb4, - 0x95dbda4d, 0xae909198, 0xeaad8e71, 0x6b93d5a0, - 0xd08ed1d0, 0xafc725e0, 0x8e3c5b2f, 0x8e7594b7, - 0x8ff6e2fb, 0xf2122b64, 0x8888b812, 0x900df01c, - 0x4fad5ea0, 0x688fc31c, 0xd1cff191, 0xb3a8c1ad, - 0x2f2f2218, 0xbe0e1777, 0xea752dfe, 0x8b021fa1, - 0xe5a0cc0f, 0xb56f74e8, 0x18acf3d6, 0xce89e299, - 0xb4a84fe0, 0xfd13e0b7, 0x7cc43b81, 0xd2ada8d9, - 0x165fa266, 0x80957705, 0x93cc7314, 0x211a1477, - 0xe6ad2065, 0x77b5fa86, 0xc75442f5, 0xfb9d35cf, - 0xebcdaf0c, 0x7b3e89a0, 0xd6411bd3, 0xae1e7e49, - 0x00250e2d, 0x2071b35e, 0x226800bb, 0x57b8e0af, - 0x2464369b, 0xf009b91e, 0x5563911d, 0x59dfa6aa, - 0x78c14389, 0xd95a537f, 0x207d5ba2, 0x02e5b9c5, - 0x83260376, 0x6295cfa9, 0x11c81968, 0x4e734a41, - 0xb3472dca, 0x7b14a94a, 0x1b510052, 0x9a532915, - 0xd60f573f, 0xbc9bc6e4, 0x2b60a476, 0x81e67400, - 0x08ba6fb5, 0x571be91f, 0xf296ec6b, 0x2a0dd915, - 0xb6636521, 0xe7b9f9b6, 0xff34052e, 0xc5855664, - 0x53b02d5d, 0xa99f8fa1, 0x08ba4799, 0x6e85076a, - 0x4b7a70e9, 0xb5b32944, 0xdb75092e, 0xc4192623, - 0xad6ea6b0, 0x49a7df7d, 0x9cee60b8, 0x8fedb266, - 0xecaa8c71, 0x699a17ff, 0x5664526c, 0xc2b19ee1, - 0x193602a5, 0x75094c29, 0xa0591340, 0xe4183a3e, - 0x3f54989a, 0x5b429d65, 0x6b8fe4d6, 0x99f73fd6, - 0xa1d29c07, 0xefe830f5, 0x4d2d38e6, 0xf0255dc1, - 0x4cdd2086, 0x8470eb26, 0x6382e9c6, 0x021ecc5e, - 0x09686b3f, 0x3ebaefc9, 0x3c971814, 0x6b6a70a1, - 0x687f3584, 0x52a0e286, 0xb79c5305, 0xaa500737, - 0x3e07841c, 0x7fdeae5c, 0x8e7d44ec, 0x5716f2b8, - 0xb03ada37, 0xf0500c0d, 0xf01c1f04, 0x0200b3ff, - 0xae0cf51a, 0x3cb574b2, 0x25837a58, 0xdc0921bd, - 0xd19113f9, 0x7ca92ff6, 0x94324773, 0x22f54701, - 0x3ae5e581, 0x37c2dadc, 0xc8b57634, 0x9af3dda7, - 0xa9446146, 0x0fd0030e, 0xecc8c73e, 0xa4751e41, - 0xe238cd99, 0x3bea0e2f, 0x3280bba1, 0x183eb331, - 0x4e548b38, 0x4f6db908, 0x6f420d03, 0xf60a04bf, - 0x2cb81290, 0x24977c79, 0x5679b072, 0xbcaf89af, - 0xde9a771f, 0xd9930810, 0xb38bae12, 0xdccf3f2e, - 0x5512721f, 0x2e6b7124, 0x501adde6, 0x9f84cd87, - 0x7a584718, 0x7408da17, 0xbc9f9abc, 0xe94b7d8c, - 0xec7aec3a, 0xdb851dfa, 0x63094366, 0xc464c3d2, - 0xef1c1847, 0x3215d908, 0xdd433b37, 0x24c2ba16, - 0x12a14d43, 0x2a65c451, 0x50940002, 0x133ae4dd, - 0x71dff89e, 0x10314e55, 0x81ac77d6, 0x5f11199b, - 0x043556f1, 0xd7a3c76b, 0x3c11183b, 0x5924a509, - 0xf28fe6ed, 0x97f1fbfa, 0x9ebabf2c, 0x1e153c6e, - 0x86e34570, 0xeae96fb1, 0x860e5e0a, 0x5a3e2ab3, - 0x771fe71c, 0x4e3d06fa, 0x2965dcb9, 0x99e71d0f, - 0x803e89d6, 0x5266c825, 0x2e4cc978, 0x9c10b36a, - 0xc6150eba, 0x94e2ea78, 0xa5fc3c53, 0x1e0a2df4, - 0xf2f74ea7, 0x361d2b3d, 0x1939260f, 0x19c27960, - 0x5223a708, 0xf71312b6, 0xebadfe6e, 0xeac31f66, - 0xe3bc4595, 0xa67bc883, 0xb17f37d1, 0x018cff28, - 0xc332ddef, 0xbe6c5aa5, 0x65582185, 0x68ab9802, - 0xeecea50f, 0xdb2f953b, 0x2aef7dad, 0x5b6e2f84, - 0x1521b628, 0x29076170, 0xecdd4775, 0x619f1510, - 0x13cca830, 0xeb61bd96, 0x0334fe1e, 0xaa0363cf, - 0xb5735c90, 0x4c70a239, 0xd59e9e0b, 0xcbaade14, - 0xeecc86bc, 0x60622ca7, 0x9cab5cab, 0xb2f3846e, - 0x648b1eaf, 0x19bdf0ca, 0xa02369b9, 0x655abb50, - 0x40685a32, 0x3c2ab4b3, 0x319ee9d5, 0xc021b8f7, - 0x9b540b19, 0x875fa099, 0x95f7997e, 0x623d7da8, - 0xf837889a, 0x97e32d77, 0x11ed935f, 0x16681281, - 0x0e358829, 0xc7e61fd6, 0x96dedfa1, 0x7858ba99, - 0x57f584a5, 0x1b227263, 0x9b83c3ff, 0x1ac24696, - 0xcdb30aeb, 0x532e3054, 0x8fd948e4, 0x6dbc3128, - 0x58ebf2ef, 0x34c6ffea, 0xfe28ed61, 0xee7c3c73, - 0x5d4a14d9, 0xe864b7e3, 0x42105d14, 0x203e13e0, - 0x45eee2b6, 0xa3aaabea, 0xdb6c4f15, 0xfacb4fd0, - 0xc742f442, 0xef6abbb5, 0x654f3b1d, 0x41cd2105, - 0xd81e799e, 0x86854dc7, 0xe44b476a, 0x3d816250, - 0xcf62a1f2, 0x5b8d2646, 0xfc8883a0, 0xc1c7b6a3, - 0x7f1524c3, 0x69cb7492, 0x47848a0b, 0x5692b285, - 0x095bbf00, 0xad19489d, 0x1462b174, 0x23820e00, - 0x58428d2a, 0x0c55f5ea, 0x1dadf43e, 0x233f7061, - 0x3372f092, 0x8d937e41, 0xd65fecf1, 0x6c223bdb, - 0x7cde3759, 0xcbee7460, 0x4085f2a7, 0xce77326e, - 0xa6078084, 0x19f8509e, 0xe8efd855, 0x61d99735, - 0xa969a7aa, 0xc50c06c2, 0x5a04abfc, 0x800bcadc, - 0x9e447a2e, 0xc3453484, 0xfdd56705, 0x0e1e9ec9, - 0xdb73dbd3, 0x105588cd, 0x675fda79, 0xe3674340, - 0xc5c43465, 0x713e38d8, 0x3d28f89e, 0xf16dff20, - 0x153e21e7, 0x8fb03d4a, 0xe6e39f2b, 0xdb83adf7, - 0xe93d5a68, 0x948140f7, 0xf64c261c, 0x94692934, - 0x411520f7, 0x7602d4f7, 0xbcf46b2e, 0xd4a20068, - 0xd4082471, 0x3320f46a, 0x43b7d4b7, 0x500061af, - 0x1e39f62e, 0x97244546, 0x14214f74, 0xbf8b8840, - 0x4d95fc1d, 0x96b591af, 0x70f4ddd3, 0x66a02f45, - 0xbfbc09ec, 0x03bd9785, 0x7fac6dd0, 0x31cb8504, - 0x96eb27b3, 0x55fd3941, 0xda2547e6, 0xabca0a9a, - 0x28507825, 0x530429f4, 0x0a2c86da, 0xe9b66dfb, - 0x68dc1462, 0xd7486900, 0x680ec0a4, 0x27a18dee, - 0x4f3ffea2, 0xe887ad8c, 0xb58ce006, 0x7af4d6b6, - 0xaace1e7c, 0xd3375fec, 0xce78a399, 0x406b2a42, - 0x20fe9e35, 0xd9f385b9, 0xee39d7ab, 0x3b124e8b, - 0x1dc9faf7, 0x4b6d1856, 0x26a36631, 0xeae397b2, - 0x3a6efa74, 0xdd5b4332, 0x6841e7f7, 0xca7820fb, - 0xfb0af54e, 0xd8feb397, 0x454056ac, 0xba489527, - 0x55533a3a, 0x20838d87, 0xfe6ba9b7, 0xd096954b, - 0x55a867bc, 0xa1159a58, 0xcca92963, 0x99e1db33, - 0xa62a4a56, 0x3f3125f9, 0x5ef47e1c, 0x9029317c, - 0xfdf8e802, 0x04272f70, 0x80bb155c, 0x05282ce3, - 0x95c11548, 0xe4c66d22, 0x48c1133f, 0xc70f86dc, - 0x07f9c9ee, 0x41041f0f, 0x404779a4, 0x5d886e17, - 0x325f51eb, 0xd59bc0d1, 0xf2bcc18f, 0x41113564, - 0x257b7834, 0x602a9c60, 0xdff8e8a3, 0x1f636c1b, - 0x0e12b4c2, 0x02e1329e, 0xaf664fd1, 0xcad18115, - 0x6b2395e0, 0x333e92e1, 0x3b240b62, 0xeebeb922, - 0x85b2a20e, 0xe6ba0d99, 0xde720c8c, 0x2da2f728, - 0xd0127845, 0x95b794fd, 0x647d0862, 0xe7ccf5f0, - 0x5449a36f, 0x877d48fa, 0xc39dfd27, 0xf33e8d1e, - 0x0a476341, 0x992eff74, 0x3a6f6eab, 0xf4f8fd37, - 0xa812dc60, 0xa1ebddf8, 0x991be14c, 0xdb6e6b0d, - 0xc67b5510, 0x6d672c37, 0x2765d43b, 0xdcd0e804, - 0xf1290dc7, 0xcc00ffa3, 0xb5390f92, 0x690fed0b, - 0x667b9ffb, 0xcedb7d9c, 0xa091cf0b, 0xd9155ea3, - 0xbb132f88, 0x515bad24, 0x7b9479bf, 0x763bd6eb, - 0x37392eb3, 0xcc115979, 0x8026e297, 0xf42e312d, - 0x6842ada7, 0xc66a2b3b, 0x12754ccc, 0x782ef11c, - 0x6a124237, 0xb79251e7, 0x06a1bbe6, 0x4bfb6350, - 0x1a6b1018, 0x11caedfa, 0x3d25bdd8, 0xe2e1c3c9, - 0x44421659, 0x0a121386, 0xd90cec6e, 0xd5abea2a, - 0x64af674e, 0xda86a85f, 0xbebfe988, 0x64e4c3fe, - 0x9dbc8057, 0xf0f7c086, 0x60787bf8, 0x6003604d, - 0xd1fd8346, 0xf6381fb0, 0x7745ae04, 0xd736fccc, - 0x83426b33, 0xf01eab71, 0xb0804187, 0x3c005e5f, - 0x77a057be, 0xbde8ae24, 0x55464299, 0xbf582e61, - 0x4e58f48f, 0xf2ddfda2, 0xf474ef38, 0x8789bdc2, - 0x5366f9c3, 0xc8b38e74, 0xb475f255, 0x46fcd9b9, - 0x7aeb2661, 0x8b1ddf84, 0x846a0e79, 0x915f95e2, - 0x466e598e, 0x20b45770, 0x8cd55591, 0xc902de4c, - 0xb90bace1, 0xbb8205d0, 0x11a86248, 0x7574a99e, - 0xb77f19b6, 0xe0a9dc09, 0x662d09a1, 0xc4324633, - 0xe85a1f02, 0x09f0be8c, 0x4a99a025, 0x1d6efe10, - 0x1ab93d1d, 0x0ba5a4df, 0xa186f20f, 0x2868f169, - 0xdcb7da83, 0x573906fe, 0xa1e2ce9b, 0x4fcd7f52, - 0x50115e01, 0xa70683fa, 0xa002b5c4, 0x0de6d027, - 0x9af88c27, 0x773f8641, 0xc3604c06, 0x61a806b5, - 0xf0177a28, 0xc0f586e0, 0x006058aa, 0x30dc7d62, - 0x11e69ed7, 0x2338ea63, 0x53c2dd94, 0xc2c21634, - 0xbbcbee56, 0x90bcb6de, 0xebfc7da1, 0xce591d76, - 0x6f05e409, 0x4b7c0188, 0x39720a3d, 0x7c927c24, - 0x86e3725f, 0x724d9db9, 0x1ac15bb4, 0xd39eb8fc, - 0xed545578, 0x08fca5b5, 0xd83d7cd3, 0x4dad0fc4, - 0x1e50ef5e, 0xb161e6f8, 0xa28514d9, 0x6c51133c, - 0x6fd5c7e7, 0x56e14ec4, 0x362abfce, 0xddc6c837, - 0xd79a3234, 0x92638212, 0x670efa8e, 0x406000e0, - 0x3a39ce37, 0xd3faf5cf, 0xabc27737, 0x5ac52d1b, - 0x5cb0679e, 0x4fa33742, 0xd3822740, 0x99bc9bbe, - 0xd5118e9d, 0xbf0f7315, 0xd62d1c7e, 0xc700c47b, - 0xb78c1b6b, 0x21a19045, 0xb26eb1be, 0x6a366eb4, - 0x5748ab2f, 0xbc946e79, 0xc6a376d2, 0x6549c2c8, - 0x530ff8ee, 0x468dde7d, 0xd5730a1d, 0x4cd04dc6, - 0x2939bbdb, 0xa9ba4650, 0xac9526e8, 0xbe5ee304, - 0xa1fad5f0, 0x6a2d519a, 0x63ef8ce2, 0x9a86ee22, - 0xc089c2b8, 0x43242ef6, 0xa51e03aa, 0x9cf2d0a4, - 0x83c061ba, 0x9be96a4d, 0x8fe51550, 0xba645bd6, - 0x2826a2f9, 0xa73a3ae1, 0x4ba99586, 0xef5562e9, - 0xc72fefd3, 0xf752f7da, 0x3f046f69, 0x77fa0a59, - 0x80e4a915, 0x87b08601, 0x9b09e6ad, 0x3b3ee593, - 0xe990fd5a, 0x9e34d797, 0x2cf0b7d9, 0x022b8b51, - 0x96d5ac3a, 0x017da67d, 0xd1cf3ed6, 0x7c7d2d28, - 0x1f9f25cf, 0xadf2b89b, 0x5ad6b472, 0x5a88f54c, - 0xe029ac71, 0xe019a5e6, 0x47b0acfd, 0xed93fa9b, - 0xe8d3c48d, 0x283b57cc, 0xf8d56629, 0x79132e28, - 0x785f0191, 0xed756055, 0xf7960e44, 0xe3d35e8c, - 0x15056dd4, 0x88f46dba, 0x03a16125, 0x0564f0bd, - 0xc3eb9e15, 0x3c9057a2, 0x97271aec, 0xa93a072a, - 0x1b3f6d9b, 0x1e6321f5, 0xf59c66fb, 0x26dcf319, - 0x7533d928, 0xb155fdf5, 0x03563482, 0x8aba3cbb, - 0x28517711, 0xc20ad9f8, 0xabcc5167, 0xccad925f, - 0x4de81751, 0x3830dc8e, 0x379d5862, 0x9320f991, - 0xea7a90c2, 0xfb3e7bce, 0x5121ce64, 0x774fbe32, - 0xa8b6e37e, 0xc3293d46, 0x48de5369, 0x6413e680, - 0xa2ae0810, 0xdd6db224, 0x69852dfd, 0x09072166, - 0xb39a460a, 0x6445c0dd, 0x586cdecf, 0x1c20c8ae, - 0x5bbef7dd, 0x1b588d40, 0xccd2017f, 0x6bb4e3bb, - 0xdda26a7e, 0x3a59ff45, 0x3e350a44, 0xbcb4cdd5, - 0x72eacea8, 0xfa6484bb, 0x8d6612ae, 0xbf3c6f47, - 0xd29be463, 0x542f5d9e, 0xaec2771b, 0xf64e6370, - 0x740e0d8d, 0xe75b1357, 0xf8721671, 0xaf537d5d, - 0x4040cb08, 0x4eb4e2cc, 0x34d2466a, 0x0115af84, - 0xe1b00428, 0x95983a1d, 0x06b89fb4, 0xce6ea048, - 0x6f3f3b82, 0x3520ab82, 0x011a1d4b, 0x277227f8, - 0x611560b1, 0xe7933fdc, 0xbb3a792b, 0x344525bd, - 0xa08839e1, 0x51ce794b, 0x2f32c9b7, 0xa01fbac9, - 0xe01cc87e, 0xbcc7d1f6, 0xcf0111c3, 0xa1e8aac7, - 0x1a908749, 0xd44fbd9a, 0xd0dadecb, 0xd50ada38, - 0x0339c32a, 0xc6913667, 0x8df9317c, 0xe0b12b4f, - 0xf79e59b7, 0x43f5bb3a, 0xf2d519ff, 0x27d9459c, - 0xbf97222c, 0x15e6fc2a, 0x0f91fc71, 0x9b941525, - 0xfae59361, 0xceb69ceb, 0xc2a86459, 0x12baa8d1, - 0xb6c1075e, 0xe3056a0c, 0x10d25065, 0xcb03a442, - 0xe0ec6e0e, 0x1698db3b, 0x4c98a0be, 0x3278e964, - 0x9f1f9532, 0xe0d392df, 0xd3a0342b, 0x8971f21e, - 0x1b0a7441, 0x4ba3348c, 0xc5be7120, 0xc37632d8, - 0xdf359f8d, 0x9b992f2e, 0xe60b6f47, 0x0fe3f11d, - 0xe54cda54, 0x1edad891, 0xce6279cf, 0xcd3e7e6f, - 0x1618b166, 0xfd2c1d05, 0x848fd2c5, 0xf6fb2299, - 0xf523f357, 0xa6327623, 0x93a83531, 0x56cccd02, - 0xacf08162, 0x5a75ebb5, 0x6e163697, 0x88d273cc, - 0xde966292, 0x81b949d0, 0x4c50901b, 0x71c65614, - 0xe6c6c7bd, 0x327a140a, 0x45e1d006, 0xc3f27b9a, - 0xc9aa53fd, 0x62a80f00, 0xbb25bfe2, 0x35bdd2f6, - 0x71126905, 0xb2040222, 0xb6cbcf7c, 0xcd769c2b, - 0x53113ec0, 0x1640e3d3, 0x38abbd60, 0x2547adf0, - 0xba38209c, 0xf746ce76, 0x77afa1c5, 0x20756060, - 0x85cbfe4e, 0x8ae88dd8, 0x7aaaf9b0, 0x4cf9aa7e, - 0x1948c25c, 0x02fb8a8c, 0x01c36ae4, 0xd6ebe1f9, - 0x90d4f869, 0xa65cdea0, 0x3f09252d, 0xc208e69f, - 0xb74e6132, 0xce77e25b, 0x578fdfe3, 0x3ac372e6 - }; - - // bcrypt IV: "OrpheanBeholderScryDoubt". The C implementation calls - // this "ciphertext", but it is really plaintext or an IV. We keep - // the name to make code comparison easier. - static private final int bf_crypt_ciphertext[] = { - 0x4f727068, 0x65616e42, 0x65686f6c, - 0x64657253, 0x63727944, 0x6f756274 - }; - - // Table for Base64 encoding - static private final char base64_code[] = { - '.', '/', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', - 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', - 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', - 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', - 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', - '6', '7', '8', '9' - }; - - // Table for Base64 decoding - static private final byte index_64[] = { - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, - -1, -1, -1, -1, -1, -1, 0, 1, 54, 55, - 56, 57, 58, 59, 60, 61, 62, 63, -1, -1, - -1, -1, -1, -1, -1, 2, 3, 4, 5, 6, - 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, - 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, - -1, -1, -1, -1, -1, -1, 28, 29, 30, - 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, - 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, - 51, 52, 53, -1, -1, -1, -1, -1 - }; - - // Expanded Blowfish key - private int P[]; - private int S[]; - - /** - * Encode a byte array using bcrypt's slightly-modified base64 - * encoding scheme. Note that this is *not* compatible with - * the standard MIME-base64 encoding. - * - * @param d the byte array to encode - * @param len the number of bytes to encode - * @throws IllegalArgumentException if the length is invalid - * @return base64-encoded string - */ - private static String encode_base64(byte d[], int len) - throws IllegalArgumentException { - int off = 0; - StringBuffer rs = new StringBuffer(); - int c1, c2; - - if (len <= 0 || len > d.length) - throw new IllegalArgumentException("Invalid len"); - - while (off < len) { - c1 = d[off++] & 0xff; - rs.append(base64_code[(c1 >> 2) & 0x3f]); - c1 = (c1 & 0x03) << 4; - if (off >= len) { - rs.append(base64_code[c1 & 0x3f]); - break; - } - c2 = d[off++] & 0xff; - c1 |= (c2 >> 4) & 0x0f; - rs.append(base64_code[c1 & 0x3f]); - c1 = (c2 & 0x0f) << 2; - if (off >= len) { - rs.append(base64_code[c1 & 0x3f]); - break; - } - c2 = d[off++] & 0xff; - c1 |= (c2 >> 6) & 0x03; - rs.append(base64_code[c1 & 0x3f]); - rs.append(base64_code[c2 & 0x3f]); - } - return rs.toString(); - } - - /** - * Look up the 3 bits base64-encoded by the specified character, - * range-checking againt conversion table - * - * @param x the base64-encoded value - * @return the decoded value of x - */ - private static byte char64(char x) { - if ((int) x < 0 || (int) x > index_64.length) - return -1; - return index_64[(int) x]; - } - - /** - * Decode a string encoded using bcrypt's base64 scheme to a - * byte array. Note that this is *not* compatible with - * the standard MIME-base64 encoding. - * - * @param s the string to decode - * @param maxolen the maximum number of bytes to decode - * @throws IllegalArgumentException if maxolen is invalid - * @return an array containing the decoded bytes - */ - private static byte[] decode_base64(String s, int maxolen) - throws IllegalArgumentException { - StringBuffer rs = new StringBuffer(); - int off = 0, slen = s.length(), olen = 0; - byte ret[]; - byte c1, c2, c3, c4, o; - - if (maxolen <= 0) - throw new IllegalArgumentException("Invalid maxolen"); - - while (off < slen - 1 && olen < maxolen) { - c1 = char64(s.charAt(off++)); - c2 = char64(s.charAt(off++)); - if (c1 == -1 || c2 == -1) - break; - o = (byte) (c1 << 2); - o |= (c2 & 0x30) >> 4; - rs.append((char) o); - if (++olen >= maxolen || off >= slen) - break; - c3 = char64(s.charAt(off++)); - if (c3 == -1) - break; - o = (byte) ((c2 & 0x0f) << 4); - o |= (c3 & 0x3c) >> 2; - rs.append((char) o); - if (++olen >= maxolen || off >= slen) - break; - c4 = char64(s.charAt(off++)); - o = (byte) ((c3 & 0x03) << 6); - o |= c4; - rs.append((char) o); - ++olen; - } - - ret = new byte[olen]; - for (off = 0; off < olen; off++) - ret[off] = (byte) rs.charAt(off); - return ret; - } - - /** - * Blowfish encipher a single 64-bit block encoded as - * two 32-bit halves - * - * @param lr an array containing the two 32-bit half blocks - * @param off the position in the array of the blocks - */ - private final void encipher(int lr[], int off) { - int i, n, l = lr[off], r = lr[off + 1]; - - l ^= P[0]; - for (i = 0; i <= BLOWFISH_NUM_ROUNDS - 2; ) { - // Feistel substitution on left word - n = S[(l >> 24) & 0xff]; - n += S[0x100 | ((l >> 16) & 0xff)]; - n ^= S[0x200 | ((l >> 8) & 0xff)]; - n += S[0x300 | (l & 0xff)]; - r ^= n ^ P[++i]; - - // Feistel substitution on right word - n = S[(r >> 24) & 0xff]; - n += S[0x100 | ((r >> 16) & 0xff)]; - n ^= S[0x200 | ((r >> 8) & 0xff)]; - n += S[0x300 | (r & 0xff)]; - l ^= n ^ P[++i]; - } - lr[off] = r ^ P[BLOWFISH_NUM_ROUNDS + 1]; - lr[off + 1] = l; - } - - /** - * Cycically extract a word of key material - * - * @param data the string to extract the data from - * @param offp a "pointer" (as a one-entry array) to the - * current offset into data - * @return the next word of material from data - */ - private static int streamtoword(byte data[], int offp[]) { - int i; - int word = 0; - int off = offp[0]; - - for (i = 0; i < 4; i++) { - word = (word << 8) | (data[off] & 0xff); - off = (off + 1) % data.length; - } - - offp[0] = off; - return word; - } - - /** - * Initialise the Blowfish key schedule - */ - private void init_key() { - P = (int[]) P_orig.clone(); - S = (int[]) S_orig.clone(); - } - - /** - * Key the Blowfish cipher - * - * @param key an array containing the key - */ - private void key(byte key[]) { - int i; - int koffp[] = {0}; - int lr[] = {0, 0}; - int plen = P.length, slen = S.length; - - for (i = 0; i < plen; i++) - P[i] = P[i] ^ streamtoword(key, koffp); - - for (i = 0; i < plen; i += 2) { - encipher(lr, 0); - P[i] = lr[0]; - P[i + 1] = lr[1]; - } - - for (i = 0; i < slen; i += 2) { - encipher(lr, 0); - S[i] = lr[0]; - S[i + 1] = lr[1]; - } - } - - /** - * Perform the "enhanced key schedule" step described by - * Provos and Mazieres in "A Future-Adaptable Password Scheme" - * http://www.openbsd.org/papers/bcrypt-paper.ps - * - * @param data salt information - * @param key password information - */ - private void ekskey(byte data[], byte key[]) { - int i; - int koffp[] = {0}, doffp[] = {0}; - int lr[] = {0, 0}; - int plen = P.length, slen = S.length; - - for (i = 0; i < plen; i++) - P[i] = P[i] ^ streamtoword(key, koffp); - - for (i = 0; i < plen; i += 2) { - lr[0] ^= streamtoword(data, doffp); - lr[1] ^= streamtoword(data, doffp); - encipher(lr, 0); - P[i] = lr[0]; - P[i + 1] = lr[1]; - } - - for (i = 0; i < slen; i += 2) { - lr[0] ^= streamtoword(data, doffp); - lr[1] ^= streamtoword(data, doffp); - encipher(lr, 0); - S[i] = lr[0]; - S[i + 1] = lr[1]; - } - } - - /** - * Perform the central password hashing step in the - * bcrypt scheme - * - * @param password the password to hash - * @param salt the binary salt to hash with the password - * @param log_rounds the binary logarithm of the number - * of rounds of hashing to apply - * @param cdata the plaintext to encrypt - * @return an array containing the binary hashed password - */ - public byte[] crypt_raw(byte password[], byte salt[], int log_rounds, - int cdata[]) { - int rounds, i, j; - int clen = cdata.length; - byte ret[]; - - if (log_rounds < 4 || log_rounds > 30) - throw new IllegalArgumentException("Bad number of rounds"); - rounds = 1 << log_rounds; - if (salt.length != BCRYPT_SALT_LEN) - throw new IllegalArgumentException("Bad salt length"); - - init_key(); - ekskey(salt, password); - for (i = 0; i != rounds; i++) { - key(password); - key(salt); - } - - for (i = 0; i < 64; i++) { - for (j = 0; j < (clen >> 1); j++) - encipher(cdata, j << 1); - } - - ret = new byte[clen * 4]; - for (i = 0, j = 0; i < clen; i++) { - ret[j++] = (byte) ((cdata[i] >> 24) & 0xff); - ret[j++] = (byte) ((cdata[i] >> 16) & 0xff); - ret[j++] = (byte) ((cdata[i] >> 8) & 0xff); - ret[j++] = (byte) (cdata[i] & 0xff); - } - return ret; - } - - /** - * Hash a password using the OpenBSD bcrypt scheme - * - * @param password the password to hash - * @param salt the salt to hash with (perhaps generated - * using BCrypt.gensalt) - * @return the hashed password - */ - public static String hashpw(String password, String salt) { - BCrypt B; - String real_salt; - byte passwordb[], saltb[], hashed[]; - char minor = (char) 0; - int rounds, off = 0; - StringBuffer rs = new StringBuffer(); - - if (salt.charAt(0) != '$' || salt.charAt(1) != '2') - throw new IllegalArgumentException("Invalid salt version"); - if (salt.charAt(2) == '$') - off = 3; - else { - minor = salt.charAt(2); - if (minor != 'a' || salt.charAt(3) != '$') - throw new IllegalArgumentException("Invalid salt revision"); - off = 4; - } - - // Extract number of rounds - if (salt.charAt(off + 2) > '$') - throw new IllegalArgumentException("Missing salt rounds"); - rounds = Integer.parseInt(salt.substring(off, off + 2)); - - real_salt = salt.substring(off + 3, off + 25); - try { - passwordb = (password + (minor >= 'a' ? "\000" : "")).getBytes("UTF-8"); - } catch (UnsupportedEncodingException uee) { - throw new AssertionError("UTF-8 is not supported"); - } - - saltb = decode_base64(real_salt, BCRYPT_SALT_LEN); - - B = new BCrypt(); - hashed = B.crypt_raw(passwordb, saltb, rounds, - (int[]) bf_crypt_ciphertext.clone()); - - rs.append("$2"); - if (minor >= 'a') - rs.append(minor); - rs.append("$"); - if (rounds < 10) - rs.append("0"); - if (rounds > 30) { - throw new IllegalArgumentException( - "rounds exceeds maximum (30)"); - } - rs.append(Integer.toString(rounds)); - rs.append("$"); - rs.append(encode_base64(saltb, saltb.length)); - rs.append(encode_base64(hashed, - bf_crypt_ciphertext.length * 4 - 1)); - return rs.toString(); - } - - /** - * Generate a salt for use with the BCrypt.hashpw() method - * - * @param log_rounds the log2 of the number of rounds of - * hashing to apply - the work factor therefore increases as - * 2**log_rounds. - * @param random an instance of SecureRandom to use - * @return an encoded salt value - */ - public static String gensalt(int log_rounds, SecureRandom random) { - StringBuffer rs = new StringBuffer(); - byte rnd[] = new byte[BCRYPT_SALT_LEN]; - - random.nextBytes(rnd); - - rs.append("$2a$"); - if (log_rounds < 10) - rs.append("0"); - if (log_rounds > 30) { - throw new IllegalArgumentException( - "log_rounds exceeds maximum (30)"); - } - rs.append(Integer.toString(log_rounds)); - rs.append("$"); - rs.append(encode_base64(rnd, rnd.length)); - return rs.toString(); - } - - /** - * Generate a salt for use with the BCrypt.hashpw() method - * - * @param log_rounds the log2 of the number of rounds of - * hashing to apply - the work factor therefore increases as - * 2**log_rounds. - * @return an encoded salt value - */ - public static String gensalt(int log_rounds) { - return gensalt(log_rounds, new SecureRandom()); - } - - /** - * Generate a salt for use with the BCrypt.hashpw() method, - * selecting a reasonable default for the number of hashing - * rounds to apply - * - * @return an encoded salt value - */ - public static String gensalt() { - return gensalt(GENSALT_DEFAULT_LOG2_ROUNDS); - } - - /** - * Check that a plaintext password matches a previously hashed - * one - * - * @param plaintext the plaintext password to verify - * @param hashed the previously-hashed password - * @return true if the passwords match, false otherwise - */ - public static boolean checkpw(String plaintext, String hashed) { - byte hashed_bytes[]; - byte try_bytes[]; - try { - String try_pw = hashpw(plaintext, hashed); - hashed_bytes = hashed.getBytes("UTF-8"); - try_bytes = try_pw.getBytes("UTF-8"); - } catch (UnsupportedEncodingException uee) { - return false; - } - if (hashed_bytes.length != try_bytes.length) - return false; - byte ret = 0; - for (int i = 0; i < try_bytes.length; i++) - ret |= hashed_bytes[i] ^ try_bytes[i]; - return ret == 0; - } -}
