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      1 /*
      2  * Copyright (C) 2013 Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #ifndef WebCryptoAlgorithm_h
     32 #define WebCryptoAlgorithm_h
     33 
     34 #include "WebCommon.h"
     35 #include "WebPrivatePtr.h"
     36 
     37 #if WEBKIT_IMPLEMENTATION
     38 #include "wtf/PassOwnPtr.h"
     39 #endif
     40 
     41 namespace WebKit {
     42 
     43 enum WebCryptoAlgorithmId {
     44     WebCryptoAlgorithmIdAesCbc,
     45     WebCryptoAlgorithmIdHmac,
     46     WebCryptoAlgorithmIdRsaSsaPkcs1v1_5,
     47     WebCryptoAlgorithmIdSha1,
     48     WebCryptoAlgorithmIdSha224,
     49     WebCryptoAlgorithmIdSha256,
     50     WebCryptoAlgorithmIdSha384,
     51     WebCryptoAlgorithmIdSha512,
     52 #if WEBKIT_IMPLEMENTATION
     53     NumberOfWebCryptoAlgorithmId,
     54 #endif
     55 };
     56 
     57 enum WebCryptoAlgorithmParamsType {
     58     WebCryptoAlgorithmParamsTypeNone,
     59     WebCryptoAlgorithmParamsTypeAesCbcParams,
     60     WebCryptoAlgorithmParamsTypeAesKeyGenParams,
     61     WebCryptoAlgorithmParamsTypeHmacParams,
     62     WebCryptoAlgorithmParamsTypeRsaSsaParams,
     63     WebCryptoAlgorithmParamsTypeRsaKeyGenParams,
     64 };
     65 
     66 class WebCryptoAesCbcParams;
     67 class WebCryptoAesKeyGenParams;
     68 class WebCryptoHmacParams;
     69 class WebCryptoRsaSsaParams;
     70 class WebCryptoRsaKeyGenParams;
     71 
     72 class WebCryptoAlgorithmParams;
     73 class WebCryptoAlgorithmPrivate;
     74 
     75 // The WebCryptoAlgorithm represents a normalized algorithm and its parameters.
     76 //   * Immutable
     77 //   * Threadsafe
     78 //   * Copiable (cheaply)
     79 class WebCryptoAlgorithm {
     80 public:
     81 #if WEBKIT_IMPLEMENTATION
     82     WebCryptoAlgorithm() { }
     83     WebCryptoAlgorithm(WebCryptoAlgorithmId, const char* name, PassOwnPtr<WebCryptoAlgorithmParams>);
     84 #endif
     85 
     86     WEBKIT_EXPORT static WebCryptoAlgorithm adoptParamsAndCreate(WebCryptoAlgorithmId, const char* name, WebCryptoAlgorithmParams*);
     87 
     88     ~WebCryptoAlgorithm() { reset(); }
     89 
     90     WebCryptoAlgorithm(const WebCryptoAlgorithm& other) { assign(other); }
     91     WebCryptoAlgorithm& operator=(const WebCryptoAlgorithm& other)
     92     {
     93         assign(other);
     94         return *this;
     95     }
     96 
     97     WEBKIT_EXPORT WebCryptoAlgorithmId id() const;
     98     WEBKIT_EXPORT const char* name() const;
     99 
    100     WEBKIT_EXPORT WebCryptoAlgorithmParamsType paramsType() const;
    101 
    102     // Retrieves the type-specific parameters. The algorithm contains at most 1
    103     // type of parameters. Retrieving an invalid parameter will return 0.
    104     WEBKIT_EXPORT WebCryptoAesCbcParams* aesCbcParams() const;
    105     WEBKIT_EXPORT WebCryptoAesKeyGenParams* aesKeyGenParams() const;
    106     WEBKIT_EXPORT WebCryptoHmacParams* hmacParams() const;
    107     WEBKIT_EXPORT WebCryptoRsaSsaParams* rsaSsaParams() const;
    108     WEBKIT_EXPORT WebCryptoRsaKeyGenParams* rsaKeyGenParams() const;
    109 
    110 private:
    111     WEBKIT_EXPORT void assign(const WebCryptoAlgorithm& other);
    112     WEBKIT_EXPORT void reset();
    113 
    114     WebPrivatePtr<WebCryptoAlgorithmPrivate> m_private;
    115 };
    116 
    117 } // namespace WebKit
    118 
    119 #endif
    120