node.js aes-256-cbc 加密解密

矫情吗；* 2023-01-20 15:53 4阅读 0赞

## 需求 ##

使用 node.js 进行AES 加密解密，代码如下

## 代码 ##

// Nodejs encryption with CTR
    const crypto = require('crypto');
    const algorithm = 'aes-256-cbc';
    const keyStr = '2ba27190770c3203a3094b1d212f5e2f'
    const ivStr = keyStr.substr(0, 16)
    const keyByte = Buffer.from(keyStr)
    const ivByte = Buffer.from(ivStr)
    
    function encrypt(text) { 
        let cipher = crypto.createCipheriv(algorithm, Buffer.from(keyStr), ivByte);
        let encrypted = cipher.update(text);
        encrypted = Buffer.concat([encrypted, cipher.final()]);
        return { 
            keyStr: keyStr,
            ivStr: ivByte.toString('hex'),
            encryptedData: encrypted.toString('hex'),
            rawBuffer: encrypted,
            base64Str: encrypted.toString("base64")
        };
    }
    
    function decrypt(text) { 
        let encryptedData = text.encryptedData
        let iv = Buffer.from(text.ivStr, 'hex');
        let encryptedText = Buffer.from(encryptedData, 'hex');
        let decipher = crypto.createDecipheriv(algorithm, Buffer.from(keyStr), iv);
        let decrypted = decipher.update(encryptedText);
        decrypted = Buffer.concat([decrypted, decipher.final()]);
        return decrypted.toString();
    }
    
    
    function decryptBase64(base64Str, ivStr) { 
        let buff = Buffer.from(base64Str, 'base64')
        let encryptedData = buff.toString('hex')
    
        let iv = Buffer.from(ivStr, 'hex');
        let encryptedText = Buffer.from(encryptedData, 'hex');
        let decipher = crypto.createDecipheriv(algorithm, Buffer.from(keyStr), iv);
        let decrypted = decipher.update(encryptedText);
        decrypted = Buffer.concat([decrypted, decipher.final()]);
        return decrypted.toString();
    }
    
    
    var hw = encrypt("001002003004005006007+（）")
    console.log('encrypted = ', hw)
    console.log('decode = ', decrypt(hw))
    console.log('decode2 = ', decryptBase64(hw.base64Str, hw.ivStr))

## 输出内容 ##

encrypted =  { 
      keyStr: '2ba27190770c3203a3094b1d212f5e2f',
      ivStr: '32626132373139303737306333323033',
      encryptedData: '47fca608a73f01a9d8215e44898d60b853076f67c60d29defcdb0e0f59294390',
      rawBuffer: <Buffer 47 fc a6 08 a7 3f 01 a9 d8 21 5e 44 89 8d 60 b8 53 07 6f 67 c6 0d 29 de fc db 0e 0f 59 29 43 90>,
      base64Str: 'R/ymCKc/AanYIV5EiY1guFMHb2fGDSne/NsOD1kpQ5A='
    }
    decode =  001002003004005006007+（）
    decode2 =  001002003004005006007+（）