经过一些研究和一些工作,我终于能够对密码进行哈希密码现在有一个问题,我想我已经使用了SHA1方法,我想尝试使用SHA512,因为我是告诉它更好(更安全)所以以下是我的代码它有点到处都是,但我认为它是可理解的:
public class Safety
{
//calling some parameters for possible later changes
public static final String algorithm = "PBKDF2WithHmacSHA1";
public static final int saltbytesize = 24;
public static final int hashbytesize = 24;
public static final int iterations = 1000;
public static final int iIndex = 0;
public static final int sIndex = 1;
public static final int pbkIndex = 2;
public static Users passwordHash(Users user) throws NoSuchAlgorithmException,
InvalidKeySpecException
{
SecureRandom sR = new SecureRandom();
byte[] pws = new byte[saltbytesize];
sR.nextBytes(pws);
byte[] pwh = pbkdf2(user.getPassword().toCharArray(), pws, iterations, hashbytesize);
user.setPassword(toHex(pwh));
byte[] sas = new byte[saltbytesize];
sR.nextBytes(sas);
byte[] sah = pbkdf2(user.getsA().toCharArray(), sas, iterations, hashbytesize);
user.setsA(toHex(sah));
user.setUserhash(pws);
user.setSahash(sas);
return user;
}
public static boolean hashpassword(String username, String password, Users user)
throws NoSuchAlgorithmException,
InvalidKeySpecException
{
byte[] pws = user.getUserhash();
byte[] pwh = pbkdf2(password.toCharArray(), pws, iterations, hashbytesize);
String searcher = toHex(pwh) + username;
String searched = user.getPassword() + user.getUsername();
if (searcher.equals(searched))
{
return true;
}
return false;
}
private static byte[] pbkdf2(char[] password, byte[] salt,
int iterations, int bytes)
throws NoSuchAlgorithmException, InvalidKeySpecException
{
PBEKeySpec spec = new PBEKeySpec(password, salt, iterations, bytes * 8);
SecretKeyFactory skf = SecretKeyFactory.getInstance(algorithm);
return skf.generateSecret(spec).getEncoded();
}
private static String toHex(byte[] array)
{
BigInteger bi = new BigInteger(1, array);
String hex = bi.toString(16);
int paddingLength = (array.length * 2) - hex.length();
if (paddingLength > 0)
return String.format("%0" + paddingLength + "d", 0) + hex;
else
return hex;
}
}
所以这是我的代码,但是,我还没有能够制作SHA512并且我已经尝试public static final String algorithm = "PBKDF2WithHmacSHA512"
但是这似乎不是算法的正确字符串,因为它抛出了没有这样的算法异常。
我也欢迎任何可以使代码更好的更改。
如上所述! 相关的几行代码
public static final String algorithm =“PBKDF2WithHmacSHA512”<<<<<<<
答案 0 :(得分:2)
无法开箱即用
OpenJDK实现仅提供PBKDF2HmacSHA1Factory.java,其中包含“HmacSHA1”摘要。就我测试而言,Oracle JDK在这个意义上并没有什么不同。
你需要做的是派生PBKDF2HmacSHA1Factory
(来吧,它是打开!)并在其构造函数中添加一个参数。您可以避免创建自己的Provider
,并按照以下步骤初始化和使用工厂:
PBKDF_SecretKeyFactory kf = new PBKDF_SecretKeyFactory("HmacSHA512");
KeySpec ks = new PBEKeySpec(password,salt,iterations,bitlen);
byte key[] = kf.engineGenerateSecret(ks).getEncoded();