ios/BitwardenWatchApp/Services/CryptoFunctionService.swift

import CryptoKit
import Foundation

class CryptoFunctionService {
    static let shared: CryptoFunctionService = .init()

    enum CryptoHashAlgorithm {
        case Sha1
        case Sha256
        case Sha512
    }

    enum CryptoError: Error {
        case AlgorithmNotImplemented
    }

    func hmac(_ data: Data, _ key: SymmetricKey, algorithm alg: CryptoHashAlgorithm) -> Data {
        switch alg {
        case .Sha1:
            Data(HMAC<Insecure.SHA1>.authenticationCode(for: data, using: key))
        case .Sha256:
            Data(HMAC<SHA256>.authenticationCode(for: data, using: key))
        case .Sha512:
            Data(HMAC<SHA512>.authenticationCode(for: data, using: key))
        }
    }
}