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      1 /*
      2  * Copyright (C) 2014 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 WebCryptoKeyAlgorithmParams_h
     32 #define WebCryptoKeyAlgorithmParams_h
     33 
     34 #include "WebCommon.h"
     35 #include "WebCryptoAlgorithm.h"
     36 #include "WebVector.h"
     37 
     38 namespace blink {
     39 
     40 enum WebCryptoKeyAlgorithmParamsType {
     41     WebCryptoKeyAlgorithmParamsTypeNone,
     42     WebCryptoKeyAlgorithmParamsTypeHmac,
     43     WebCryptoKeyAlgorithmParamsTypeAes,
     44     WebCryptoKeyAlgorithmParamsTypeRsaHashed
     45 };
     46 
     47 class WebCryptoKeyAlgorithmParams {
     48 public:
     49     virtual ~WebCryptoKeyAlgorithmParams() { }
     50     virtual WebCryptoKeyAlgorithmParamsType type() const
     51     {
     52         return WebCryptoKeyAlgorithmParamsTypeNone;
     53     }
     54 };
     55 
     56 class WebCryptoAesKeyAlgorithmParams : public WebCryptoKeyAlgorithmParams {
     57 public:
     58     explicit WebCryptoAesKeyAlgorithmParams(unsigned short lengthBits)
     59         : m_lengthBits(lengthBits)
     60     {
     61     }
     62 
     63     unsigned short lengthBits() const
     64     {
     65         return m_lengthBits;
     66     }
     67 
     68     virtual WebCryptoKeyAlgorithmParamsType type() const
     69     {
     70         return WebCryptoKeyAlgorithmParamsTypeAes;
     71     }
     72 
     73 private:
     74     unsigned short m_lengthBits;
     75 };
     76 
     77 class WebCryptoHmacKeyAlgorithmParams : public WebCryptoKeyAlgorithmParams {
     78 public:
     79     WebCryptoHmacKeyAlgorithmParams(const WebCryptoAlgorithm& hash, unsigned lengthBits)
     80         : m_hash(hash)
     81         , m_lengthBits(lengthBits)
     82     {
     83     }
     84 
     85     const WebCryptoAlgorithm& hash() const
     86     {
     87         return m_hash;
     88     }
     89 
     90     unsigned lengthBits() const
     91     {
     92         return m_lengthBits;
     93     }
     94 
     95     virtual WebCryptoKeyAlgorithmParamsType type() const
     96     {
     97         return WebCryptoKeyAlgorithmParamsTypeHmac;
     98     }
     99 
    100 private:
    101     WebCryptoAlgorithm m_hash;
    102     unsigned m_lengthBits;
    103 };
    104 
    105 class WebCryptoRsaHashedKeyAlgorithmParams : public WebCryptoKeyAlgorithmParams {
    106 public:
    107     WebCryptoRsaHashedKeyAlgorithmParams(unsigned modulusLengthBits, const unsigned char* publicExponent, unsigned publicExponentSize, const WebCryptoAlgorithm& hash)
    108         : m_modulusLengthBits(modulusLengthBits)
    109         , m_publicExponent(publicExponent, publicExponentSize)
    110         , m_hash(hash)
    111     {
    112     }
    113 
    114     unsigned modulusLengthBits() const
    115     {
    116         return m_modulusLengthBits;
    117     }
    118 
    119     const WebVector<unsigned char>& publicExponent() const
    120     {
    121         return m_publicExponent;
    122     }
    123 
    124     const WebCryptoAlgorithm& hash() const
    125     {
    126         return m_hash;
    127     }
    128 
    129     virtual WebCryptoKeyAlgorithmParamsType type() const
    130     {
    131         return WebCryptoKeyAlgorithmParamsTypeRsaHashed;
    132     }
    133 
    134 private:
    135     unsigned m_modulusLengthBits;
    136     WebVector<unsigned char> m_publicExponent;
    137     WebCryptoAlgorithm m_hash;
    138 };
    139 
    140 } // namespace blink
    141 
    142 #endif
    143