PBKDF2与SHA256在Android [英] PBKDF2 with SHA256 on android

问题描述

我要生成使用PBKDF2与SHA256密码的派生哈希值。与此 SecretKeyFactory.getInstance（PBKDF2WithHmacSHA1）这部作品，但它使用SHA1。 随着 SecretKeyFactory.getInstance（PBKDF2WithHmacSHA256）（或 SecretKeyFactory.getInstance（PBKDF2WithHmacSHA256，SC）时，与spongycastle）我有一个错误。

I want to generate a derived hash of a password using PBKDF2 with SHA256. with this SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1") this work but it use SHA1. With SecretKeyFactory.getInstance("PBKDF2WithHmacSHA256") (or SecretKeyFactory.getInstance("PBKDF2WithHmacSHA256","SC") when with spongycastle) i have an error.

我怎样才能成功使用PBKDF2WithHmacSHA256生成一个散列？

How can i succeed to generate a hash using PBKDF2WithHmacSHA256?

推荐答案

如果您使用1.47版或SpongyCastle高，你可以调用PBKDF2WithHmacSHA256直接：

If you use version 1.47 or higher of SpongyCastle, you can invoke PBKDF2WithHmacSHA256 directly:

PKCS5S2ParametersGenerator generator = new PKCS5S2ParametersGenerator(new SHA256Digest());
generator.init(PBEParametersGenerator.PKCS5PasswordToUTF8Bytes(password), salt, iterations);
KeyParameter key = (KeyParameter)generator.generateDerivedMacParameters(keySizeInBits);

在BC＆LT版本; 1.47，你不能指定SHA256摘要并默认为SHA1。

In versions of BC < 1.47, you could not specify SHA256 digest and it defaulted to SHA1.

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