Java的RSA签名

落日映苍穹つ 2022-06-07 12:53 183阅读 0赞

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 = "<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);   
    	}  
    
    }