diff options
Diffstat (limited to 'CommonLibrary/common-util/src/main/java/org/openo/baseservice/encrypt/cbb/sha/Sha256.java')
-rw-r--r-- | CommonLibrary/common-util/src/main/java/org/openo/baseservice/encrypt/cbb/sha/Sha256.java | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/CommonLibrary/common-util/src/main/java/org/openo/baseservice/encrypt/cbb/sha/Sha256.java b/CommonLibrary/common-util/src/main/java/org/openo/baseservice/encrypt/cbb/sha/Sha256.java new file mode 100644 index 0000000..74cc2bb --- /dev/null +++ b/CommonLibrary/common-util/src/main/java/org/openo/baseservice/encrypt/cbb/sha/Sha256.java @@ -0,0 +1,110 @@ +/* + * Copyright (c) 2016, Huawei Technologies Co., Ltd. + * + * Licensed 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.openo.baseservice.encrypt.cbb.sha; + +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.nio.charset.StandardCharsets; +import java.security.InvalidKeyException; +import java.security.Key; +import java.security.MessageDigest; +import java.security.NoSuchAlgorithmException; + +import javax.crypto.Mac; +import javax.crypto.spec.SecretKeySpec; +import javax.xml.bind.DatatypeConverter; + +/** + * Utility to generate SHA256 digest and HMAC.<br/> + * <p> + * </p> + * + * @author + * @version SDNO 0.5 03-Jun-2016 + */ +public final class Sha256 { + + private static final Logger LOGGER = LoggerFactory.getLogger(Sha256.class); + + private Sha256() { + + } + + /** + * Generates SHA256 digest.<br/> + * + * @param data: The data to be digested. + * @return Hex encoded digested data. + * @since SDNO 0.5 + */ + public static String digest(final String data) { + final byte[] dataBytes = data.getBytes(StandardCharsets.UTF_8); + MessageDigest md = null; + try { + md = MessageDigest.getInstance("SHA-256"); + } catch(final NoSuchAlgorithmException e) { + LOGGER.error("No SHA-256 support ", e); + return ""; + } + final byte[] digest = md.digest(dataBytes); + return DatatypeConverter.printHexBinary(digest); + } + + /** + * Generates hmac signature using data and key.<br/> + * + * @param data: The data to be signed. + * @param key: The signing key. + * @return Hex encoded HMAC signature. + * @throws InvalidKeyException if the key is invalid. + * @since SDNO 0.5 + */ + public static String mac(final String data, final Key key) throws InvalidKeyException { + final byte[] dataBytes = data.getBytes(StandardCharsets.UTF_8); + Mac mac = null; + try { + mac = Mac.getInstance("HmacSHA256"); + mac.init(key); + } catch(final NoSuchAlgorithmException e) { + LOGGER.error("SHA mac not supported", e); + return ""; + } + final byte[] digest = mac.doFinal(dataBytes); + return DatatypeConverter.printHexBinary(digest); + + } + + /** + * Generates hmac with data and secret. + * <br/> + * + * @param data: The data to be signed. + * @param secret: The signing key. + * @return Hex encoded HMAC signature. + * @since SDNO 0.5 + */ + public static String mac(final String data, final byte[] secret) { + final Key key = new SecretKeySpec(secret, "HmacSHA256"); + try { + return mac(data, key); + } catch(final InvalidKeyException e) { + LOGGER.error("Invalid key: ", e); + return ""; + } + } + +} |