[JAVA] Encrypt strings with B Crypt quickly

I wrote the code to encrypt the string with BCrypt with the command line argument, so make a note of it. It's supposed to be done quickly without using package management tools such as Maven.

Package download

Manually download the library to use from the site.

• spring-security-core-5.0.2.RELEASE.jar
• commons-logging-1.2.jar

• If only spring-security-core is used, java.lang.NoClassDefFoundError is output that there is no commons-logging at runtime, so add it for the time being. *

Implementation

Store these libraries under lib and implement the following 2 classes. CLBCryptPasswordEncoder.java that encrypts the arguments with BCrypt.

import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.apache.commons.logging.LogFactory;

public class CLBCryptPasswordEncoder{
  public static void main(String args[]){

    String textPassword = args[0];

    BCryptPasswordEncoder encoder = new BCryptPasswordEncoder();
    System.out.println(encoder.encode(textPassword));
  }
}

CLBCryptPasswordMatcher.java to check if the plaintext password and the encrypted password match.

import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.apache.commons.logging.LogFactory;

public class CLBCryptPasswordMatcher{
  public static void main(String args[]){
    BCryptPasswordEncoder encoder = new BCryptPasswordEncoder();

    String textPassword = args[0];
    String encryptedPassword = args[1];

    if (encoder.matches(textPassword, encryptedPassword)) {
      System.out.println("matched");
    } else {
      System.out.println("mismatched");
    }
  }
}

Directory structure

The directory structure is as follows.

• CLBCryptPasswordEncoder.java
• CLBCryptPasswordMatcher.java
• lib/
  • commons-logging-1.2.jar
  • spring-security-core-5.0.2.RELEASE.jar

compile

$ javac -cp "lib/*" CLBCryptPasswordEncoder.java
$ javac -cp "lib/*" CLBCryptPasswordMatcher.java

A class is created in the current directory.

Run

Perform encryption and verification. Add current directory to classpath.

$ java -cp "lib/*:." CLBCryptPasswordEncoder sonomirai
$2a$10$ALcXPgrpOQKXoIyrgS90huCbgR906LtWrH1dOsZmHtBZdSB19n9Bi
$ java -cp "lib/*:." CLBCryptPasswordMatcher sonomirai '$2a$10$ALcXPgrpOQKXoIyrgS90huCbgR906LtWrH1dOsZmHtBZdSB19n9Bi'
matched
$ java -cp "lib/*:." CLBCryptPasswordMatcher dummypswd '$2a$10$ALcXPgrpOQKXoIyrgS90huCbgR906LtWrH1dOsZmHtBZdSB19n9Bi'
mismatched

I did what I wanted to do like this.