我的密码加密功能怎么了？

Question

存储在我的数据库中的密码是这样加密的：

byte[] salt = NewSalt();
string encryptedPassword = EncryptPassword("passwordInTheClear", salt);
// Add/update the admin-user with password and salt.

加密功能：

public static string EncryptPassword(string password, byte[] salt)
{
    // derive a 256-bit subkey (use HMACSHA1 with 10,000 iterations)
    return Convert.ToBase64String(KeyDerivation.Pbkdf2(
        password: password,
        salt: salt,
        prf: KeyDerivationPrf.HMACSHA1,
        iterationCount: 10000,
        numBytesRequested: 256 / 8));
}

制盐机：

public static byte[] NewSalt()
{
    // generate a 128-bit salt using a secure PRNG
    byte[] salt = new byte[128 / 8];
    using (var rng = RandomNumberGenerator.Create())
    {
        rng.GetBytes(salt);
    }
    return salt;
}

[当用户尝试登录系统时，我使用相同的加密功能和相同的盐，从登录表单中加密输入的密码，并将其与数据库中存储的加密密码进行比较：

// (I have separated out the password check from the linq query just for debugging purposes)
AdminUser au = await db.AdminUsers
    .Where(u =>
        u.Email1 == loginForm.UserName)
    .FirstOrDefaultAsync().ConfigureAwait(false);
byte[] salt = Encoding.ASCII.GetBytes(au.PasswordSalt);
string encryptedEnteredPassword = EncryptPassword(loginForm.Password, salt);
if (au.Password == encryptedEnteredPassword)
{
    // Success!
}

但是存储的和输入的密码不匹配。

示例：

In the database:
Unencrypted password: 1234
Salt: Cda6ZgNVluChtzseyq9uMQ==
Encrypted password: PKzE3rr9CGGmVW3UJS1N7mqrXmzni3hsqyCtP8lrehE=

In the login form:
Entered, unencrypted password: 1234
Salt: Cda6ZgNVluChtzseyq9uMQ==
Encrypted password: WwYUZqV1GfuRKEitpRdKDjTMEGWy+1nYzpkWI+eZPB0=

Answer 1

您正在以ASCII形式从数据库中获取盐，而示例中的盐显然是Base64。您只需将Encoding.ASCII.GetBytes(au.PasswordSalt)替换为Convert.FromBase64String(au.PasswordSalt)并命名为一天。