| /* |
| * 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) |
| // |
| // Interface for a signature function. |
| |
| #ifndef PAGESPEED_KERNEL_BASE_SIGNATURE_H_ |
| #define PAGESPEED_KERNEL_BASE_SIGNATURE_H_ |
| |
| #include "pagespeed/kernel/base/basictypes.h" |
| #include "pagespeed/kernel/base/string.h" |
| #include "pagespeed/kernel/base/string_util.h" |
| |
| // To enable URL signing with HMAC-SHA1, we must link against OpenSSL, |
| // which is a a large library with licensing restrictions not known to |
| // be wholly inline with the Apache license. To disable URL signing: |
| // 1. Set SIGN_URL to 0 here |
| // 2. Comment out the references to openssl.gyp in kernel.gyp. |
| // 3. Comment out all references to openssl in src/DEPS. |
| // |
| |
| #ifndef ENABLE_URL_SIGNATURES |
| #define ENABLE_URL_SIGNATURES 1 |
| #endif |
| |
| namespace net_instaweb { |
| |
| class Signature { |
| public: |
| // The passed in max_chars will be used to limit the length of Sign() and |
| // SignatureSizeInChars(). |
| explicit Signature(); |
| virtual ~Signature(); |
| |
| // Computes a web64-encoded signature of data under a given key. Takes a |
| // StringPiece for signing key, which is used for a pointer to the key and the |
| // length of the signing key, and a StringPiece for the data, which is used |
| // for a pointer to the data to sign, and the length of the data. |
| GoogleString Sign(StringPiece key, StringPiece data) const; |
| |
| // Returns the string length of the signatures produced by the Sign() method. |
| virtual int SignatureSizeInChars() const = 0; |
| |
| protected: |
| // Computes a binary signature of a given data under key. |
| virtual GoogleString RawSign(StringPiece key, StringPiece data) const = 0; |
| // The number of bytes RawSign will produce. |
| virtual int RawSignatureSizeInBytes() const = 0; |
| |
| private: |
| DISALLOW_COPY_AND_ASSIGN(Signature); |
| }; |
| |
| } // namespace net_instaweb |
| |
| |
| #endif // PAGESPEED_KERNEL_BASE_SIGNATURE_H_ |