Language: JavaScript
Label: safe
CWE: CWE-331 \u2014 Insufficient Entropy
The product uses an algorithm or scheme that produces insufficient entropy, leaving patterns or clusters of values that are more likely to occur than others.

Code:
    NodeCryptography.prototype.decryptBuffer = function (key, ciphertext) {
        var bIv = ciphertext.slice(0, NodeCryptography.IV_LENGTH);
        var bCiphertext = ciphertext.slice(NodeCryptography.IV_LENGTH);
        if (bCiphertext.byteLength <= 0)
            throw new Error('decryption error: empty content');
        var aes = (0, crypto_1.createDecipheriv)(this.algo, key, bIv);
        return Buffer.concat([aes.update(bCiphertext), aes.final()]);
    };