java 读取.pfx证书文件公钥私钥字符串

冷不防 2023-06-16 01:54 7阅读 0赞

import cn.hutool.core.codec.Base64Encoder;
    
    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 ReadP12Cert
    {
        public static void main(String[] args)
        {
            //证书路径
            final String KEYSTORE_FILE     = "D:\\123.pfx";
            //证书密码
            final String KEYSTORE_PASSWORD = "111111";
    
    
            try
            {
                //获取PKCS12密钥库
                KeyStore ks = KeyStore.getInstance("PKCS12");
                FileInputStream fis = new FileInputStream(KEYSTORE_FILE);
    
                // If the keystore password is empty(""), then we have to set
                // to null, otherwise it won't work!!!
                char[] nPassword = null;
                if ((KEYSTORE_PASSWORD == null) || KEYSTORE_PASSWORD.trim().equals(""))
                {
                    nPassword = null;
                }
                else
                {   //把密码字符串转为字符数组
                    nPassword = KEYSTORE_PASSWORD.toCharArray();
                }
                //将.pfx证书信息加载密钥库
                ks.load(fis, nPassword);
                fis.close();
                //证书类型
                System.out.println("keystore type=" + ks.getType());
    
    
                Enumeration enum1 = ks.aliases();
                String keyAlias = null;
                if (enum1.hasMoreElements())
                {   //获取证书别名
                    keyAlias = (String)enum1.nextElement();
                    System.out.println("alias=[" + keyAlias + "]");
                }
    
    
                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 = " + Base64Encoder.encode(pubkey.getEncoded()));
                System.out.println("private key = " + Base64Encoder.encode(prikey.getEncoded()));
            }
            catch (Exception e)
            {
                e.printStackTrace();
            }
        }
    }