| // Copyright 2017 Google Inc. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| // |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| package com.google.crypto.tink.streamingaead; |
| |
| import com.google.crypto.tink.proto.HashType; |
| import java.security.NoSuchAlgorithmException; |
| |
| class StreamingAeadUtil { |
| /** |
| * Returns the HMAC algorithm name corresponding to a hash type. |
| * |
| * @param hash the hash type |
| * @return the JCE's HMAC algorithm name for the hash. |
| */ |
| public static String toHmacAlgo(HashType hash) throws NoSuchAlgorithmException { |
| switch (hash) { |
| case SHA1: |
| return "HmacSha1"; |
| case SHA256: |
| return "HmacSha256"; |
| case SHA512: |
| return "HmacSha512"; |
| default: |
| throw new NoSuchAlgorithmException("hash unsupported for HMAC: " + hash); |
| } |
| } |
| } |