java读取pfx格式的证书-并获取公钥私钥

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package com.hgh.javase.security;

import java.io.FileInputStream;
import java.security.KeyStore;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.cert.Certificate;
import java.util.Enumeration;

public class ReadPFX {  
    public ReadPFX (){  
    }  
    //转换成十六进制字符串 
    public static String Byte2String(byte[] b) {  
        String hs="";  
        String stmp="";  

        for (int n=0;n<b.length;n++) {  
            stmp=(java.lang.Integer.toHexString(b[n] & 0XFF));  
            if (stmp.length()==1) hs=hs+"0"+stmp;  
            else hs=hs+stmp;  
            //if (n<b.length-1) hs=hs+":"; 
        }  
        return hs.toUpperCase();  
    }  

    public static byte[] StringToByte(int number) {   
        int temp = number;   
        byte[] b=new byte[4];   
        for (int i=b.length-1;i>-1;i--){   
            b[i] = new Integer(temp&0xff).byteValue();//将最高位保存在最低位 
            temp = temp >> 8; //向右移8位 
        }   
        return b;   
    }   
     public  PrivateKey GetPvkformPfx(String strPfx, String strPassword){  
        try {  
            KeyStore ks = KeyStore.getInstance("PKCS12");  
            FileInputStream fis = new FileInputStream(strPfx);  
            // If the keystore password is empty(""), then we have to set 
            // to null, otherwise it won't work!!! 
            char[] nPassword = null;  
            if ((strPassword == null) || strPassword.trim().equals("")){  
                nPassword = null;  
            }  
            else  
            {  
                nPassword = strPassword.toCharArray();  
            }  
            ks.load(fis, nPassword);  
            fis.close();  
            System.out.println("keystore type=" + ks.getType());  
            // Now we loop all the aliases, we need the alias to get keys. 
            // It seems that this value is the "Friendly name" field in the 
            // detals tab <-- Certificate window <-- view <-- Certificate 
            // Button <-- Content tab <-- Internet Options <-- Tools menu 
            // In MS IE 6. 
            Enumeration enumas = ks.aliases();  
            String keyAlias = null;  
            if (enumas.hasMoreElements())// we are readin just one certificate. 
            {  
                keyAlias = (String)enumas.nextElement();   
                System.out.println("alias=[" + keyAlias + "]");  
            }  
            // Now once we know the alias, we could get the keys. 
            System.out.println("is key entry=" + ks.isKeyEntry(keyAlias));  
            PrivateKey prikey = (PrivateKey) ks.getKey(keyAlias, nPassword);  
            Certificate cert = ks.getCertificate(keyAlias);  
            PublicKey pubkey = cert.getPublicKey();  
            System.out.println("cert class = " + cert.getClass().getName());  
            System.out.println("cert = " + cert);  
            System.out.println("public key = " + pubkey);  
            System.out.println("private key = " + prikey);  
            return prikey;  
        }  
        catch (Exception e)  
        {  
            e.printStackTrace();  
        }  
        return null;  
    }

     public static void main(String[] args) throws Exception {
         String strPfx = "G:\\workspaceOfJava\\javaSe_test\\testfile\\联想测试pfx证书-密码123.pfx";
         String strPassword ="123";
          KeyStore ks = KeyStore.getInstance("PKCS12");  
          FileInputStream fis = new FileInputStream(strPfx);  
          // If the keystore password is empty(""), then we have to set 
          // to null, otherwise it won't work!!! 
          char[] nPassword = null;  
          if ((strPassword == null) || strPassword.trim().equals("")){  
              nPassword = null;  
          }  
          else  
          {  
              nPassword = strPassword.toCharArray();  
          }  
          ks.load(fis, nPassword);  
          fis.close();  
          System.out.println("keystore type=" + ks.getType());  
          // Now we loop all the aliases, we need the alias to get keys. 
          // It seems that this value is the "Friendly name" field in the 
          // detals tab <-- Certificate window <-- view <-- Certificate 
          // Button <-- Content tab <-- Internet Options <-- Tools menu 
          // In MS IE 6. 
          Enumeration enumas = ks.aliases();  
          String keyAlias = null;  
          if (enumas.hasMoreElements())// we are readin just one certificate. 
          {  
              keyAlias = (String)enumas.nextElement();   
              System.out.println("alias=[" + keyAlias + "]");  
          }  
          // Now once we know the alias, we could get the keys. 
          System.out.println("is key entry=" + ks.isKeyEntry(keyAlias));  
          PrivateKey prikey = (PrivateKey) ks.getKey(keyAlias, nPassword);  
          Certificate cert = ks.getCertificate(keyAlias);  
          PublicKey pubkey = cert.getPublicKey();  
          System.out.println("cert class = " + cert.getClass().getName());  
          System.out.println("cert = " + cert);  
          System.out.println("public key = " + pubkey);  
          System.out.println("private key = " + prikey);  
    }
}  

keystore type=PKCS12
alias=[51d5a154-415e-4b1b-a055-bb37858ca95a]
is key entry=true
cert class = sun.security.x509.X509CertImpl
cert = [
[
  Version: V3
  Subject: O="iTrusChina Co.,Ltd.", OU=Lenovo Project, CN=测试证书20180223, OU=QXCD - 33333, OU=TaxCD - 22222, OU=AgencyID - 11111, EMAILADDRESS=13076684@q123123.com
  Signature Algorithm: SHA1withRSA, OID = 1.2.840.113549.1.1.5

  Key:  Sun RSA public key, 2048 bits
  modulus: 22657557413401284100317094122201793054162429174129431065947590647854190906608370581286403391341087763841097975687068701429936152897071539889422949403226598003536587449975692615847706829935556655811895258170702116834985572238495571627042731572846922335830615637175517376649775332008195580962533786663755913965907159282213259680423901869255714119163043711206221551766213650295141599478801968859399127722270154565860981431180272488351937142179175776325777949972384300433866258071941139117596804563616993083186036901020114838205796878318295684796020281687231710152726135818054983898634643653967742508133763124702016417333
  public exponent: 65537
  Validity: [From: Fri Feb 23 16:02:18 CST 2018,
 To: Sat Feb 23 16:02:18 CST 2019]
  Issuer: CN=iTrusChina Class 2 Enterprise Subscriber CA - G3, OU=China Trust Network, O=iTrusChina, C=CN
  SerialNumber: [    3d94cfc7 94b6bec0 90f6a2ac 8c3f270b ee9bddc7]

Certificate Extensions: 3
[1]: ObjectId: 2.5.29.19 Criticality=false BasicConstraints:[ CA:false PathLen: undefined ]  [2]: ObjectId: 2.5.29.31 Criticality=false CRLDistributionPoints [ [DistributionPoint: [URIName: http://topca.itrus.com.cn/public/itruscrl?CA=2C1D97288DE14F85C6640698FB24739AF47DFD1A] ]]  [3]: ObjectId: 2.5.29.15 Criticality=false KeyUsage [ DigitalSignature Key_Encipherment ]  ] Algorithm: [SHA1withRSA] Signature: 0000: 5B EE E7 0C 11 FF 50 0E 04 8F B8 09 7F F7 BF 0E [.....P......... 0010: A5 5C B6 BB F7 78 DE EC AF 32 9A C1 02 9A 7B 5E .\...x...2.....^ 0020: 23 19 9D 8D 8C 47 16 0B AA F0 92 EF 29 51 5B 3E #....G......)Q[> 0030: 03 E5 4F 18 86 DC ED 4C 63 29 3B E6 06 7A 1C 92 ..O....Lc);..z.. 0040: 20 1D 60 2B 42 C5 C3 B6 98 61 A0 8E 20 FF 0F 33 .`+B....a.. ..3 0050: CA F0 32 C8 8B 2C 64 D7 99 4F FC 4F 98 22 4E D3 ..2..,d..O.O."N. 0060: 6A E3 0E F8 A7 2D 04 AD 37 39 23 4C 21 09 C4 8F j....-..79#L!... 0070: 9D 7E 4D 5B 5C C9 25 4F BB EC 6F 80 C8 B8 F0 CE ..M[\.%O..o..... 0080: BD D8 E6 E5 88 88 DB 7B BA 64 E2 57 E3 0F ED 55 .........d.W...U 0090: 74 A6 77 AD 9F CC 78 07 BD 69 7E 6C D3 B5 7E BE t.w...x..i.l.... 00A0: 0D DF 47 40 D0 BE 00 08 F5 3B AE C6 70 0B BB DD ..G@.....;..p... 00B0: 51 50 20 3F CF AD 96 BC 69 0B B3 F3 02 16 D3 DE QP ?....i....... 00C0: 31 7B 78 A2 92 C3 00 E1 24 22 39 41 F6 BD 31 7C 1.x.....$"9A..1. 00D0: 8A 1B 73 0E 59 23 2A 2E 6C 9A 34 8B CB 2F E8 24 ..s.Y#*.l.4../.$ 00E0: 33 07 19 8B 55 D6 5E C9 A5 92 F2 CB 38 1E 37 3F 3...U.^.....8.7? 00F0: B0 20 0C 64 60 03 17 4C C9 CE 7E 67 C5 98 BF F3 . .d`..L...g....  ] public key = Sun RSA public key, 2048 bits modulus: 22657557413401284100317094122201793054162429174129431065947590647854190906608370581286403391341087763841097975687068701429936152897071539889422949403226598003536587449975692615847706829935556655811895258170702116834985572238495571627042731572846922335830615637175517376649775332008195580962533786663755913965907159282213259680423901869255714119163043711206221551766213650295141599478801968859399127722270154565860981431180272488351937142179175776325777949972384300433866258071941139117596804563616993083186036901020114838205796878318295684796020281687231710152726135818054983898634643653967742508133763124702016417333 public exponent: 65537 private key = sun.security.rsa.RSAPrivateCrtKeyImpl@9f22d