使用Node.js crypto模块AES-256-CFB解密无法还原原文本

我使用AES-256-CFB加密方法对文本加密，但用相同参数解密时，无法还原出加密前的原文本。已确认密钥（ss）和初始向量（iv）在加密和解密时完全一致。

加密代码 #

const ss = Buffer.from(decipher.update(sender.ss, "hex", "hex"), "hex");
const iv = crypto.randomBytes(16);
const cipher = crypto.createCipheriv(process.env.encryptionMethod, ss, iv);
const encryptedMsg = cipher.update(req.body.msg, "utf8", "utf8") + cipher.final("utf8");

解密代码 #

const decipherMsg = crypto.createDecipheriv(process.env.encryptionMethod, ss, Buffer.from(msg.iv, "hex"));
const msgText = decipherMsg.update(msg.msg.toString("utf8"), "utf8", "utf8") + decipherMsg.final("utf8");

测试示例 #

加密侧 #

• req.body.msg: hi
• encryptedMsg: �D
• encryptedMsg对应的Buffer: <Buffer ef bf bd 44>

解密侧 #

• msg.msg对应的Buffer: <Buffer ef bf bd 44>
• msg.msg.toString("utf8"): �D
• 解密后的msgText: >�b�

内容的提问来源于stack exchange，提问作者Anshuman Garg