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 WebCryptoKeyAlgorithm_h 32 #define WebCryptoKeyAlgorithm_h 33 34 #include "WebCommon.h" 35 #include "WebCryptoAlgorithm.h" 36 #include "WebCryptoKeyAlgorithmParams.h" 37 #include "WebPrivatePtr.h" 38 39 #if INSIDE_BLINK 40 #include "wtf/PassOwnPtr.h" 41 #endif 42 43 namespace blink { 44 45 class WebCryptoKeyAlgorithmPrivate; 46 47 // WebCryptoKeyAlgorithm represents the algorithm used to generate a key. 48 // * Immutable 49 // * Threadsafe 50 // * Copiable (cheaply) 51 class WebCryptoKeyAlgorithm { 52 public: WebCryptoKeyAlgorithm()53 WebCryptoKeyAlgorithm() { } 54 55 #if INSIDE_BLINK 56 BLINK_PLATFORM_EXPORT WebCryptoKeyAlgorithm(WebCryptoAlgorithmId, PassOwnPtr<WebCryptoKeyAlgorithmParams>); 57 #endif 58 59 // FIXME: Delete this in favor of the create*() functions. 60 BLINK_PLATFORM_EXPORT static WebCryptoKeyAlgorithm adoptParamsAndCreate(WebCryptoAlgorithmId, WebCryptoKeyAlgorithmParams*); 61 62 BLINK_PLATFORM_EXPORT static WebCryptoKeyAlgorithm createAes(WebCryptoAlgorithmId, unsigned short keyLengthBits); 63 BLINK_PLATFORM_EXPORT static WebCryptoKeyAlgorithm createHmac(WebCryptoAlgorithmId hash, unsigned keyLengthBits); 64 BLINK_PLATFORM_EXPORT static WebCryptoKeyAlgorithm createRsaHashed(WebCryptoAlgorithmId, unsigned modulusLengthBits, const unsigned char* publicExponent, unsigned publicExponentSize, WebCryptoAlgorithmId hash); 65 ~WebCryptoKeyAlgorithm()66 ~WebCryptoKeyAlgorithm() { reset(); } 67 WebCryptoKeyAlgorithm(const WebCryptoKeyAlgorithm & other)68 WebCryptoKeyAlgorithm(const WebCryptoKeyAlgorithm& other) { assign(other); } 69 WebCryptoKeyAlgorithm& operator=(const WebCryptoKeyAlgorithm& other) 70 { 71 assign(other); 72 return *this; 73 } 74 75 BLINK_PLATFORM_EXPORT bool isNull() const; 76 77 BLINK_PLATFORM_EXPORT WebCryptoAlgorithmId id() const; 78 79 BLINK_PLATFORM_EXPORT WebCryptoKeyAlgorithmParamsType paramsType() const; 80 81 // Returns the type-specific parameters for this key. If the requested 82 // parameters are not applicable (for instance an HMAC key does not have 83 // any AES parameters) then returns 0. 84 BLINK_PLATFORM_EXPORT WebCryptoAesKeyAlgorithmParams* aesParams() const; 85 BLINK_PLATFORM_EXPORT WebCryptoHmacKeyAlgorithmParams* hmacParams() const; 86 BLINK_PLATFORM_EXPORT WebCryptoRsaHashedKeyAlgorithmParams* rsaHashedParams() const; 87 88 // Write the algorithm parameters to a dictionary. 89 BLINK_PLATFORM_EXPORT void writeToDictionary(WebCryptoKeyAlgorithmDictionary*) const; 90 91 private: 92 BLINK_PLATFORM_EXPORT void assign(const WebCryptoKeyAlgorithm& other); 93 BLINK_PLATFORM_EXPORT void reset(); 94 95 WebPrivatePtr<WebCryptoKeyAlgorithmPrivate> m_private; 96 }; 97 98 } // namespace blink 99 100 #endif 101