rspec/rules/S3329/java/rule.adoc

include::../description.adoc[]

== Noncompliant Code Example

[source,java]
----
public void encrypt(String key, String plainText) {
    byte[] bytesIV = "7cVgr5cbdCZVw5WY".getBytes("UTF-8"); // Static initialization vector

    IvParameterSpec iv = new IvParameterSpec(bytesIV);
    SecretKeySpec skeySpec = new SecretKeySpec(strKey.getBytes("UTF-8"), "AES");

    Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
    cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);  // Noncompliant: the IV is hard coded and thus not generated with a secure random generator
}
----

== Compliant Solution

[source,java]
----
public void encrypt(String key, String plainText) {
    SecureRandom random = new SecureRandom();
    byte[] bytesIV = new byte[16];
    random.nextBytes(bytesIV); // Random initialization vector

    IvParameterSpec iv = new IvParameterSpec(bytesIV);
    SecretKeySpec skeySpec = new SecretKeySpec(strKey.getBytes("UTF-8"), "AES");

    Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
    cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
}
----


include::../see.adoc[]
* Derived from FindSecBugs rule https://find-sec-bugs.github.io/bugs.htm#STATIC_IV[STATIC_IV]



ifdef::env-github,rspecator-view[]

'''
== Implementation Specification
(visible only on this page)

include::../message.adoc[]

'''
== Comments And Links
(visible only on this page)

include::../comments-and-links.adoc[]
endif::env-github,rspecator-view[]