我正在解密一个大文件( 450mb )。
我正在使用 fs.createReadStream 读取文件,并使用 crypto-js 解密。
该文件已使用UTF8加密。
文件的内容为JSON。
我的功能:
function decryptFile(srcDir, fileName, destDir) {
let encryptedPath = path.join(srcDir, fileName);
let decryptedPath = path.join(destDir, fileName).replace('.xam', '.json');
console.log('DECRYPTING XAM FILE ' + encryptedPath + ' TO ' + decryptedPath);
const input = fs.createReadStream(encryptedPath);
input.once('readable', () => {
const decipher = crypto.createDecipher('xxx-xxx-xxx', 'XxxX');
const output = fs.createWriteStream(decryptedPath);
input.pipe(decipher).pipe(output).on('finish', () => {
console.log('FILE DECRYPTED');
}).on('error', error => {
console.log(error);
});
});
}
更新 错误:
Error: error:0606506D:digital envelope routines:EVP_DecryptFinal_ex:wrong final block length
at Decipher._flush (crypto.js:158:28)
at Decipher.prefinish (_stream_transform.js:137:10)
at emitNone (events.js:106:13)
at Decipher.emit (events.js:208:7)
at prefinish (_stream_writable.js:602:14)
at finishMaybe (_stream_writable.js:610:5)
at afterWrite (_stream_writable.js:464:3)
at onwrite (_stream_writable.js:454:7)
at Decipher.afterTransform (_stream_transform.js:90:3)
at Decipher._transform (crypto.js:153:3)
更新 标题
答案 0 :(得分:0)
我已经实施了同样的方法来模拟您的问题。我有同样的错误。您遇到了一个已知问题。请遵循本指南。 http://vancelucas.com/blog/stronger-encryption-and-decryption-in-node-js/有效。测试了。
const crypto2 = require('crypto');
var fs = require('fs');
function decryptFile(fileName) {
const input = fs.createReadStream(fileName+'.encrypted');
const output = fs.createWriteStream(fileName+'.unencrypted');
const initVect = crypto2.randomBytes(16);
const CIPHER_KEY = new Buffer('12345678901234567890123456789012');
const decipher = crypto2.createDecipheriv('aes-256-cbc', CIPHER_KEY, initVect);
input.pipe(decipher).pipe(output).on('finish', () => {
console.log('FILE DECRYPTED');
}).on('error', error => {
console.log(error);
});
}
function encryptFile(fileName) {
const initVect = crypto2.randomBytes(16);
const CIPHER_KEY = new Buffer('12345678901234567890123456789012');
var aes = crypto2.createCipheriv('aes-256-cbc', CIPHER_KEY, initVect);
const input = fs.createReadStream(fileName);
const output = fs.createWriteStream(fileName+'.encrypted');
input
.pipe(aes)
.pipe(output)
.on('finish', function () {
console.log('done encrypting');
});
}
encryptFile('cas_01.cas');
//decryptFile('cas_01.cas');