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我对密码学的所有术语还是很陌生，所以请原谅我对这个主题的无知。使用 node.js 的加密模块时发生了一些奇怪的事情。它将仅加密 16 个字符。更多，它会失败并显示以下错误消息：

TypeError: error:06065064:digital envelope routines:EVP_DecryptFinal_ex:bad decrypt
at Decipher.Cipher.final (crypto.js:292:27)
at decrypt (C:\node_apps\crypto_test\app.js:39:21)
at C:\node_apps\crypto_test\app.js:16:21
at Interface._onLine (readline.js:200:5)
at Interface._line (readline.js:531:8)
at Interface._ttyWrite (readline.js:760:14)
at ReadStream.onkeypress (readline.js:99:10)
at ReadStream.emit (events.js:98:17)
at emitKey (readline.js:1095:12)
at ReadStream.onData (readline.js:840:14)

我正在使用的代码如下所示：

var rl = require('readline');
var crypto =require('crypto');

var interface = rl.createInterface({
input: process.stdin,
output:process.stdout
});

interface.question('Enter text to encrypt: ',function(texto){
var encrypted = encrypt(texto);
console.log('Encrypted text:',encrypted);

console.log('Decrypting text...');
var decrypted = decrypt(encrypted);
console.log('Decrypted text:',decrypted);
process.exit();
});

function encrypt(text)
{
var cipher =crypto.createCipher('aes192','password');
text = text.toString('utf8');
cipher.update(text);
return cipher.final('binary');

}

function decrypt(text)
{
var decipher = crypto.createDecipher('aes192','password');
decipher.update(text,'binary','utf8');
return decipher.final('utf8');
}

为什么这不加密超过 16 个字符？是因为我使用的算法吗？我如何加密某些东西而不关心它有多长？

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1 回答 1

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问题是您正在丢弃部分加密和解密数据。update()可以像final()can 一样返回数据。所以改变你的encrypt()喜欢decrypt()：

function encrypt(text)
{
var cipher =crypto.createCipher('aes192', 'password');
text = text.toString('utf8');
return cipher.update(text, 'utf8', 'binary') + cipher.final('binary');
}

function decrypt(text)
{
var decipher = crypto.createDecipher('aes192', 'password');
return decipher.update(text, 'binary', 'utf8') + decipher.final('utf8');
}
于 2014-10-26T13:56:46.390 回答