如何在Java中生成SALT值？

Question

什麼是以Java字符串形式生成SALT值的最佳方式，字符串長度至少爲32字節？

Answer 1

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

Answer 2

在SpringSecurity可以使用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