如何在Mirth Connect中运行Bouncy Castle算法并转换对应Java代码为JS

前置准备 #

• 下载对应版本的Bouncy Castle依赖包：bcprov-jdk15on、bcpg-jdk15on
• 将两个jar包放入Mirth安装目录下的custom-lib文件夹
• 重启Mirth服务使依赖生效

加密函数代码 #

// 导入依赖Java类
var ByteArrayOutputStream = java.io.ByteArrayOutputStream;
var ArmoredOutputStream = org.bouncycastle.bcpg.ArmoredOutputStream;
var PGPEncryptedDataGenerator = org.bouncycastle.openpgp.PGPEncryptedDataGenerator;
var JcePGPDataEncryptorBuilder = org.bouncycastle.openpgp.operator.jcajce.JcePGPDataEncryptorBuilder;
var SecureRandom = java.security.SecureRandom;
var JcePBEKeyEncryptionMethodGenerator = org.bouncycastle.openpgp.operator.jcajce.JcePBEKeyEncryptionMethodGenerator;
var Security = java.security.Security;
var BouncyCastleProvider = org.bouncycastle.jce.provider.BouncyCastleProvider;

// 注册BC加密提供者，全局仅需执行一次
Security.addProvider(new BouncyCastleProvider());

function encrypt(dataToEncrypt, passPhrase, algorithm, armor) {
    var bOut = new ByteArrayOutputStream();
    var out = bOut;
    
    if (armor) {
        out = new ArmoredOutputStream(out);
    }
    
    var encGen = new PGPEncryptedDataGenerator(
        new JcePGPDataEncryptorBuilder(algorithm)
            .setSecureRandom(new SecureRandom())
            .setProvider("BC")
    );
    encGen.addMethod(
        new JcePBEKeyEncryptionMethodGenerator(passPhrase)
            .setProvider("BC")
    );
    
    var encOut = encGen.open(out, dataToEncrypt.length);
    encOut.write(dataToEncrypt);
    encOut.close();
    
    if (armor) {
        out.close();
    }
    
    return bOut.toByteArray();
}

调用示例 #

// 待加密内容转UTF-8字节数组
var dataToEncrypt = new java.lang.String("测试加密内容").getBytes("UTF-8");
// 密码转char数组
var passArray = "你的加密密码".toCharArray();
// 调用加密方法，使用CAST5算法，开启ASCII装甲
var encryptedBytes = encrypt(dataToEncrypt, passArray, PGPEncryptedDataGenerator.CAST5, true);

// 如需转可读字符串可执行以下代码
var encryptedStr = new java.lang.String(encryptedBytes, "UTF-8");

注意事项 #

• 加密后返回值为字节数组，若需要存储或传输可按需转为Base64编码或直接使用装甲格式的字符串
• 密码建议避免硬编码在代码中，可存入Mirth的配置映射表中读取使用

内容的提问来源于stack exchange，提问作者sgowd