Fabric java sdk 1.4简明教程

HFClientUserLocalUser

容易理解，一个用户的身份是由它的证书来标识的，同时交易还需要证书对应的私钥，因此LocalUser的核心逻辑就是利用指定的证书和私钥PEM文件满足User接口的要求。

LocalUser

import org.hyperledger.fabric.sdk.User;
import org.hyperledger.fabric.sdk.security.CryptoPrimitives;

public class LocalUser implements User{             //实现User接口
  private String name;
  private String mspId;
  private Enrollment enrollment;

  LocalUser(String name,String mspId){
    this.name = name;
    this.mspId = mspId;
  }

  private Enrollment loadFromPemFile(String keyFile,String certFile){ /*见下文说明*/ }

  @Override public String getName(){ return name; }
  @Override public String getMspId() { return mspId}
  @Override public Enrollment getEnrollment() { return enrollment; }
  @Override public String getAccount() { return null; }
  @Override public String getAffiliation() { return null; }
}

EnrollmentX509Enrollment

private Enrollment loadFromPemFile(String keyFile,String certFile) throws Exception{
  byte[] keyPem = Files.readAllBytes(Paths.get(keyFile));     //载入私钥PEM文本
  byte[] certPem = Files.readAllBytes(Paths.get(certFile));   //载入证书PEM文本
  CryptoPrimitives suite = new CryptoPrimitives();            //载入密码学套件
  PrivateKey privateKey = suite.bytesToPrivateKey(keyPem);    //将PEM文本转换为私钥对象
  return new X509Enrollment(privateKey,new String(certPem));  //创建并返回X509Enrollment对象
}