Java的RSA签名

rsasign.java主方法

package com.vvvtimes.util;import java.security.KeyFactory;import java.security.PrivateKey;import java.security.spec.PKCS8EncodedKeySpec;import java.security.spec.RSAPrivateKeySpec;import org.bouncycastle.asn1.ASN1InputStream;import org.bouncycastle.asn1.ASN1Primitive;import org.bouncycastle.asn1.pkcs.RSAPrivateKeyStructure;public class rsasign {    static String header = "<!-- 537606aed546c5ba42c0820ad7fd0d74ee7caf90c232a484d0464b3332c42a9189555aebdba3570fe6566842ba7b7bb88da360f202ae9536a2a12fcdf39600c7 --><ObtainTicketResponse><message></message><prolongationPeriod>607875500</prolongationPeriod><responseCode>OK</responseCode><salt>1508484258274</salt><ticketId>1</ticketId><ticketProperties>licensee=Administrator    licenseType=0   </ticketProperties></ObtainTicketResponse>";    static String content = "<ObtainTicketResponse><message></message><prolongationPeriod>607875500</prolongationPeriod><responseCode>OK</responseCode><salt>1508484258274</salt><ticketId>1</ticketId><ticketProperties>licensee=Administrator\tlicenseType=0\t</ticketProperties></ObtainTicketResponse>";    String ASNKEY = "-----BEGIN RSA PRIVATE KEY-----\r\n"            + "MIIBOgIBAAJBALecq3BwAI4YJZwhJ+snnDFj3lF3DMqNPorV6y5ZKXCiCMqj8OeOmxk4YZW9aaV9\r\n"            + "ckl/zlAOI0mpB3pDT+Xlj2sCAwEAAQJAW6/aVD05qbsZHMvZuS2Aa5FpNNj0BDlf38hOtkhDzz/h\r\n"            + "kYb+EBYLLvldhgsD0OvRNy8yhz7EjaUqLCB0juIN4QIhAOeCQp+NXxfBmfdG/S+XbRUAdv8iHBl+\r\n"            + "F6O2wr5fA2jzAiEAywlDfGIl6acnakPrmJE0IL8qvuO3FtsHBrpkUuOnXakCIQCqdr+XvADI/UTh\r\n"            + "TuQepuErFayJMBSAsNe3NFsw0cUxAQIgGA5n7ZPfdBi3BdM4VeJWb87WrLlkVxPqeDSbcGrCyMkC\r\n"            + "IFSs5JyXvFTreWt7IQjDssrKDRIPmALdNjvfETwlNJyY\r\n"            + "-----END RSA PRIVATE KEY-----";    String PCKS8KEY = "-----BEGIN PRIVATE KEY-----\r\n"            + "MIIBVAIBADANBgkqhkiG9w0BAQEFAASCAT4wggE6AgEAAkEAt5yrcHAAjhglnCEn\r\n"            + "6yecMWPeUXcMyo0+itXrLlkpcKIIyqPw546bGThhlb1ppX1ySX/OUA4jSakHekNP\r\n"            + "5eWPawIDAQABAkBbr9pUPTmpuxkcy9m5LYBrkWk02PQEOV/fyE62SEPPP+GRhv4Q\r\n"            + "Fgsu+V2GCwPQ69E3LzKHPsSNpSosIHSO4g3hAiEA54JCn41fF8GZ90b9L5dtFQB2\r\n"            + "/yIcGX4Xo7bCvl8DaPMCIQDLCUN8YiXppydqQ+uYkTQgvyq+47cW2wcGumRS46dd\r\n"            + "qQIhAKp2v5e8AMj9ROFO5B6m4SsVrIkwFICw17c0WzDRxTEBAiAYDmftk990GLcF\r\n"            + "0zhV4lZvztasuWRXE+p4NJtwasLIyQIgVKzknJe8VOt5a3shCMOyysoNEg+YAt02\r\n"            + "O98RPCU0nJg=\r\n" + "-----END PRIVATE KEY-----";    static String key22 = "MIIBOgIBAAJBALecq3BwAI4YJZwhJ+snnDFj3lF3DMqNPorV6y5ZKXCiCMqj8OeOmxk4YZW9aaV9"            + "ckl/zlAOI0mpB3pDT+Xlj2sCAwEAAQJAW6/aVD05qbsZHMvZuS2Aa5FpNNj0BDlf38hOtkhDzz/h"            + "kYb+EBYLLvldhgsD0OvRNy8yhz7EjaUqLCB0juIN4QIhAOeCQp+NXxfBmfdG/S+XbRUAdv8iHBl+"            + "F6O2wr5fA2jzAiEAywlDfGIl6acnakPrmJE0IL8qvuO3FtsHBrpkUuOnXakCIQCqdr+XvADI/UTh"            + "TuQepuErFayJMBSAsNe3NFsw0cUxAQIgGA5n7ZPfdBi3BdM4VeJWb87WrLlkVxPqeDSbcGrCyMkC"            + "IFSs5JyXvFTreWt7IQjDssrKDRIPmALdNjvfETwlNJyY";    static String key33 = "MIIBVAIBADANBgkqhkiG9w0BAQEFAASCAT4wggE6AgEAAkEAt5yrcHAAjhglnCEn"            + "6yecMWPeUXcMyo0+itXrLlkpcKIIyqPw546bGThhlb1ppX1ySX/OUA4jSakHekNP"            + "5eWPawIDAQABAkBbr9pUPTmpuxkcy9m5LYBrkWk02PQEOV/fyE62SEPPP+GRhv4Q"            + "Fgsu+V2GCwPQ69E3LzKHPsSNpSosIHSO4g3hAiEA54JCn41fF8GZ90b9L5dtFQB2"            + "/yIcGX4Xo7bCvl8DaPMCIQDLCUN8YiXppydqQ+uYkTQgvyq+47cW2wcGumRS46dd"            + "qQIhAKp2v5e8AMj9ROFO5B6m4SsVrIkwFICw17c0WzDRxTEBAiAYDmftk990GLcF"            + "0zhV4lZvztasuWRXE+p4NJtwasLIyQIgVKzknJe8VOt5a3shCMOyysoNEg+YAt02"            + "O98RPCU0nJg=";public static String Sign(String content){    return rsasign.Sign(content.getBytes(), key22);}public static String Sign2(String content){        return rsasign.Sign2(content.getBytes(), key33);    }//传入秘钥为ASN格式    //私钥签名程序，privateKey是私钥base64编码字符串，即私钥文件数据中，中间的主体部分    public static String Sign(byte[] content, String privateKey) {try {byte[] keybyte = Base64.decode(privateKey.toString());ASN1InputStream in = new ASN1InputStream(keybyte);ASN1Primitive obj = in.readObject();RSAPrivateKeyStructure pStruct = RSAPrivateKeyStructure.getInstance(obj);RSAPrivateKeySpec spec = new RSAPrivateKeySpec(pStruct.getModulus(), pStruct.getPrivateExponent());KeyFactory keyFactory = KeyFactory.getInstance("RSA");PrivateKey priKey = keyFactory.generatePrivate(spec);java.security.Signature signature = java.security.Signature.getInstance("MD5WithRSA");signature.initSign(priKey);signature.update(content);byte[] signed = signature.sign();return Hex.bytesToHexString(signed);        }        catch (Exception e) {            e.printStackTrace();        }        return null;    }        //传入秘钥为PKCS#8私钥非加密格式//私钥签名程序，privateKey是私钥base64编码字符串，即私钥文件数据中，中间的主体部分public static String Sign2(byte[] content, String privateKey) {try {PKCS8EncodedKeySpec priPKCS8 = new PKCS8EncodedKeySpec(Base64.decode(privateKey));KeyFactory keyf = KeyFactory.getInstance("RSA");PrivateKey priKey = keyf.generatePrivate(priPKCS8);java.security.Signature signature = java.security.Signature.getInstance("MD5WithRSA");signature.initSign(priKey);signature.update(content);byte[] signed = signature.sign();return Hex.bytesToHexString(signed);} catch (Exception e) {e.printStackTrace();}return null;}}

Base64.java base64编码解码相关方法

package com.vvvtimes.util;import java.io.IOException;public class Base64 {/** * 编码 *  * @param bstr * @return String */public static String encode(byte[] bstr) {return new sun.misc.BASE64Encoder().encode(bstr);}/** * 解码 *  * @param str * @return string */public static byte[] decode(String str) {byte[] bt = null;try {sun.misc.BASE64Decoder decoder = new sun.misc.BASE64Decoder();bt = decoder.decodeBuffer(str);} catch (IOException e) {e.printStackTrace();}return bt;}}

Hex.java String转hex方法

package com.vvvtimes.util;public class Hex {public static String bytesToHexString(byte[] src){       StringBuilder stringBuilder = new StringBuilder("");       if (src == null || src.length <= 0) {           return null;       }       for (int i = 0; i < src.length; i++) {           int v = src[i] & 0xFF;           String hv = Integer.toHexString(v);           if (hv.length() < 2) {               stringBuilder.append(0);           }           stringBuilder.append(hv);       }       return stringBuilder.toString();   }   /**   * Convert hex string to byte[]   * @param hexString the hex string   * @return byte[]   */  public static byte[] hexStringToBytes(String hexString) {       if (hexString == null || hexString.equals("")) {           return null;       }       hexString = hexString.toUpperCase();       int length = hexString.length() / 2;       char[] hexChars = hexString.toCharArray();       byte[] d = new byte[length];       for (int i = 0; i < length; i++) {           int pos = i * 2;           d[i] = (byte) (charToByte(hexChars[pos]) << 4 | charToByte(hexChars[pos + 1]));       }       return d;   }  private static byte charToByte(char c) {       return (byte) "0123456789ABCDEF".indexOf(c);   }  }