PBKDF2 with SHA256 on android

android, encryption, pbkdf2, sha256

Solution

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);

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

Problem

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. How can i succeed to generate a hash using PBKDF2WithHmacSHA256?

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