从 ColdFusion 加密的 NodeJS 中解密 AES/CBC/PKCS5Padding

Question

我正在将 nodeJS 应用程序与 ColdFusion 应用程序合并。我使用下面的方法在 ColdFusion 中进行了加密，其中密钥是加密密钥字符串

key = 'nQw7y6QejwGFh/SNrul20Q=='
encrypt(value, key, "AES/CBC/PKCS5Padding", "HEX");

然后，在 NodeJS 中，我尝试使用 crypto

对其进行解密

const crypto = require('crypto');

const key = "nQw7y6QejwGFh/SNrul20Q=="; 
const binaryEncryptionKey = new Buffer( key, "base64" );

decrypt = (value) => {
        try {
            var decipher = crypto.createDecipheriv( "AES-128-CBC", binaryEncryptionKey );
            var value = (
                decipher.update( value, "base64", "utf8" ) +
                decipher.final( "utf8" )
            );
            return value;
        } catch (err) {
            console.log(err);
        }
}

首先return缓冲区警告：

DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead.

然后，我得到了错误：

TypeError [ERR_INVALID_ARG_TYPE]: The "iv" argument must be of type string or an instance of Buffer, TypedArray, or DataView. Received undefined

我没有“iv”，因为 ColdFusion 端没有用它来加密。是否可以在 NodeJS 中解密？

当我更改为 Buffer.alloc 时，出现错误：

TypeError [ERR_INVALID_ARG_TYPE]: The "size" argument must be of type number. Received type string ('nQw7y6QejwGFh/SNrul20Q==..)

比如我有如下加密字符串：FB391CAAE5CD8FF47C55211ED8636D213C95F233B615D4E56CB7CD6B051D01DF356E1C45ED7AABAB5F9BCBB9EED6355B

谢谢

Answer 1

描述了 ColdFusion encrypt 功能 here。可以明确指定 AES/CBC 所需的 16 字节 IV。如果没有给出 IV，它会自动生成并放在密文前面（参见 Michael Fehr 的评论）。在NodeJS中解密可以这样进行：

const crypto = require('crypto');

const key = Buffer.from('nQw7y6QejwGFh/SNrul20Q==', 'base64');  
const ivCiphertext = Buffer.from('FB391CAAE5CD8FF47C55211ED8636D213C95F233B615D4E56CB7CD6B051D01DF356E1C45ED7AABAB5F9BCBB9EED6355B', 'hex');
const iv = ivCiphertext.slice(0, 16);
const ciphertext = ivCiphertext.slice(16);

var decrypt = (value) => {
    try {
        var decipher = crypto.createDecipheriv('AES-128-CBC', key, iv);
        var value = 
            decipher.update(value, '', 'utf8') +
            decipher.final('utf8');
        return value;
    } catch (err) {
        console.log(err);
    }
}

console.log(decrypt(ciphertext)); // 4388576099656673

与结果4388576099656673，与对应的ColdFusion脚本一致，可以执行e.g. here, 秒。示例：

<cfscript>
key = 'nQw7y6QejwGFh/SNrul20Q==';
iv = BinaryDecode('FB391CAAE5CD8FF47C55211ED8636D21', 'HEX');
ciphertext = '3C95F233B615D4E56CB7CD6B051D01DF356E1C45ED7AABAB5F9BCBB9EED6355B';
plaintext = decrypt(ciphertext, key, 'AES/CBC/PKCS5Padding', 'HEX', iv);
writeOutput(plaintext);
</cfscript>

注意 new Buffer() is deprecated. A description of Buffer.alloc() can be found here.

从 ColdFusion 加密的 NodeJS 中解密 AES/CBC/PKCS5Padding

Decrypt AES/CBC/PKCS5Padding in NodeJS from ColdFusion encrypt

encryption

coldfusion

node.js