EVP_DecryptFinal_ex:在使用Node.js时进行坏解密。

Using the following node js:

使用以下节点js:

var crypto = require('crypto');
var encrypt = function (input, password, callback) {
    var m = crypto.createHash('md5');
    m.update(password);
    var key = m.digest('hex');

    m = crypto.createHash('md5');
    m.update(password + key);
    var iv = m.digest('hex');
    console.log(iv);

    var data = new Buffer(input, 'utf8').toString('binary');

    var cipher = crypto.createCipheriv('aes-256-cbc', key, iv.slice(0,16));
    var encrypted = cipher.update(data, 'binary') + cipher.final('binary');
    var encoded = new Buffer(encrypted, 'binary').toString('base64');
    callback(encoded);
};

var decrypt = function (input, password, callback) {
    // Convert urlsafe base64 to normal base64
    input = input.replace(/\-/g, '+').replace(/_/g, '/');
    // Convert from base64 to binary string
    var edata = new Buffer(input, 'base64').toString('binary');

    // Create key from password
    var m = crypto.createHash('md5');
    m.update(password);
    var key = m.digest('hex');

    // Create iv from password and key
    m = crypto.createHash('md5');
    m.update(password + key);
    var iv = m.digest('hex');

    // Decipher encrypted data
    var decipher = crypto.createDecipheriv('aes-256-cbc', key, iv.slice(0,16));
    var decrypted = decipher.update(edata, 'binary') + decipher.final('binary');
    var plaintext = new Buffer(decrypted, 'binary').toString('utf8');

    callback(plaintext);
};
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