spb/os-vault Public

1import CommonCrypto2import Foundation34func pbkdf2(hash: CCPBKDFAlgorithm, password: String, salt: Data, keyByteCount: Int, rounds: Int) -> Data? {5    let passwordData = password.data(using: String.Encoding.utf8)!6    var derivedKeyData = Data(repeating: 0, count: keyByteCount)7    let derivedKeyDataCount = derivedKeyData.count8    let derivationStatus = derivedKeyData.withUnsafeMutableBytes { derivedKeyBytes in9        salt.withUnsafeBytes { saltBytes in10            CCKeyDerivationPBKDF(11                CCPBKDFAlgorithm(kCCPBKDF2),12                password, passwordData.count,13                saltBytes, salt.count,14                hash,15                UInt32(rounds),16                derivedKeyBytes, derivedKeyDataCount17            )18        }19    }2021    if derivationStatus != 0 {22        print("Error: \(derivationStatus)")23        return nil24    }2526    return derivedKeyData27}28