How to generate SALT value in Java?

Question

What\'s the best way to produce a SALT value in Java as a String that\'s at least 32 bytes long?

Answer 1

In SpringSecurity you can use org.springframework.security.crypto.keygen.KeyGenerators

http://static.springsource.org/spring-security/site/docs/3.1.x/apidocs/org/springframework/security/crypto/keygen/KeyGenerators.html

http://docs.spring.io/spring-security/site/docs/3.2.x/reference/htmlsingle/#spring-security-crypto-keygenerators

Answer 2

final Random r = new SecureRandom();
byte[] salt = new byte[32];
r.nextBytes(salt);
/** String encodedSalt = Base64.encodeBase64String(salt); */