本文實例講述了Java數字簽名算法DSA。分享給大家供大家參考,具體如下:
一、介紹
DSS:Digital Signature Standard 數字簽名標準
DSA:Digital Signature Algorithm 數字簽名算法
DSA僅包含數字簽名
二、參數說明
三、代碼實現
package com.imooc.security.dsa;import java.security.KeyFactory;import java.security.KeyPair;import java.security.KeyPairGenerator;import java.security.PrivateKey;import java.security.PublicKey;import java.security.Signature;import java.security.interfaces.DSAPrivateKey;import java.security.interfaces.DSAPublicKey;import java.security.spec.PKCS8EncodedKeySpec;import java.security.spec.X509EncodedKeySpec;import org.apache.commons.codec.binary.Hex;public class ImoocDSA { private static String src = "cakin24 security dsa"; public static void main(String[] args) { jdkDSA(); } public static void jdkDSA() { try { //1.初始化密鑰KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("DSA"); keyPairGenerator.initialize(512); KeyPair keyPair = keyPairGenerator.generateKeyPair(); DSAPublicKey dsaPublicKey = (DSAPublicKey) keyPair.getPublic(); DSAPrivateKey dsaPrivateKey = (DSAPrivateKey)keyPair.getPrivate(); //2.執行簽名PKCS8EncodedKeySpec pkcs8EncodedKeySpec = new PKCS8EncodedKeySpec(dsaPrivateKey.getEncoded()); KeyFactory keyFactory = KeyFactory.getInstance("DSA"); PrivateKey privateKey = keyFactory.generatePrivate(pkcs8EncodedKeySpec); Signature signature = Signature.getInstance("SHA1withDSA"); signature.initSign(privateKey); signature.update(src.getBytes()); byte[] result = signature.sign(); System.out.println("jdk dsa sign : " + Hex.encodeHexString(result)); //3.驗證簽名X509EncodedKeySpec x509EncodedKeySpec = new X509EncodedKeySpec(dsaPublicKey.getEncoded()); keyFactory = KeyFactory.getInstance("DSA"); PublicKey publicKey = keyFactory.generatePublic(x509EncodedKeySpec); signature = Signature.getInstance("SHA1withDSA"); signature.initVerify(publicKey); signature.update(src.getBytes()); boolean bool = signature.verify(result); System.out.println("jdk dsa verify : " + bool); } catch (Exception e) { e.printStackTrace(); } }}四、實現效果
jdk dsa sign : 302c0214310539f9e19ec98167a687eb4e8f91e7f47326bf021428080b7f0ad2ccffc71466998d8d364ba516e840
jdk dsa verify : true
五、應用場景
PS:關於加密解密感興趣的朋友還可以參考本站在線工具:
在線RSA加密/解密工具:
http://tools.VeVB.COm/password/rsa_encode
文字在線加密解密工具(包含AES、DES、RC4等):
http://tools.VeVB.COm/password/txt_encode
MD5在線加密工具:
http://tools.VeVB.COm/password/CreateMD5Password
在線散列/哈希算法加密工具:
http://tools.VeVB.COm/password/hash_encrypt
在線MD5/hash/SHA-1/SHA-2/SHA-256/SHA-512/SHA-3/RIPEMD-160加密工具:
http://tools.VeVB.COm/password/hash_md5_sha
在線sha1/sha224/sha256/sha384/sha512加密工具:
http://tools.VeVB.COm/password/sha_encode
更多關於java相關內容感興趣的讀者可查看本站專題:《Java數學運算技巧總結》、《Java數據結構與算法教程》、《Java字符與字符串操作技巧總結》、《Java操作DOM節點技巧總結》和《Java緩存操作技巧匯總》
希望本文所述對大家java程序設計有所幫助。