| /* |
| * Copyright 2014 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. |
| */ |
| |
| // Author: jcrowell@google.com (Jeffrey Crowell) |
| // |
| // Implementation for a signature function. |
| |
| #ifndef PAGESPEED_KERNEL_BASE_SHA1_SIGNATURE_H_ |
| #define PAGESPEED_KERNEL_BASE_SHA1_SIGNATURE_H_ |
| |
| #include "pagespeed/kernel/base/basictypes.h" |
| #include "pagespeed/kernel/base/signature.h" |
| #include "pagespeed/kernel/base/string.h" |
| #include "pagespeed/kernel/base/string_util.h" |
| |
| namespace net_instaweb { |
| |
| // Implementation class of Signature, using HMAC-SHA1 for signing. |
| class SHA1Signature : public Signature { |
| public: |
| static const int kDefaultSignatureSize = 10; |
| static const int kSHA1NumBytes = 20; |
| |
| SHA1Signature(); |
| explicit SHA1Signature(int signature_size); |
| virtual ~SHA1Signature(); |
| int SignatureSizeInChars() const; |
| static int ComputeSizeFromNumberOfBytes(int num_bytes); |
| |
| protected: |
| virtual GoogleString RawSign(StringPiece key, StringPiece data) const; |
| virtual int RawSignatureSizeInBytes() const; |
| |
| private: |
| int max_chars_; |
| |
| DISALLOW_COPY_AND_ASSIGN(SHA1Signature); |
| }; |
| |
| } // namespace net_instaweb |
| |
| #endif // PAGESPEED_KERNEL_BASE_SHA1_SIGNATURE_H_ |