Do not use DES

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Metadata

ID: java-security/no-des-cipher

Language: Java

Severity: Error

Category: Security

Description

DES is considered strong ciphers for modern applications. NIST recommends the usage of AES block ciphers instead of DES.

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Non-Compliant Code Examples

class MyClass {

    public void test1() {
        Cipher c = Cipher.getInstance("DES/ECB/PKCS5Padding");
        c.init(Cipher.ENCRYPT_MODE, k, iv);
        byte[] cipherText = c.doFinal(plainText);
    }

    public void test2() {
        Cipher c = Cipher.getInstance("DESede/ECB/PKCS5Padding");
        c.init(Cipher.ENCRYPT_MODE, k, iv);
        byte[] cipherText = c.doFinal(plainText);
    }

    public void test3() {
        javax.crypto.Cipher c = javax.crypto.Cipher.getInstance("DES/ECB/PKCS5Padding");
        // Prepare the cipher to encrypt
        javax.crypto.SecretKey key = javax.crypto.KeyGenerator.getInstance("DES").generateKey();
        java.security.spec.AlgorithmParameterSpec paramSpec =
                new javax.crypto.spec.IvParameterSpec(iv);
        c.init(javax.crypto.Cipher.ENCRYPT_MODE, key, paramSpec);
    }
}

Compliant Code Examples

class MyClass {

    public void test() {
        Cipher c = Cipher.getInstance("AES/GCM/NoPadding");
        c.init(Cipher.ENCRYPT_MODE, k, iv);
        byte[] cipherText = c.doFinal(plainText);
    }
}