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 #include "config.h" 32 #include "public/platform/WebCryptoKeyAlgorithm.h" 33 34 #include "wtf/OwnPtr.h" 35 #include "wtf/ThreadSafeRefCounted.h" 36 37 namespace blink { 38 39 // FIXME: Remove the need for this. 40 WebCryptoAlgorithm createHash(WebCryptoAlgorithmId hash) 41 { 42 return WebCryptoAlgorithm::adoptParamsAndCreate(hash, 0); 43 } 44 45 class WebCryptoKeyAlgorithmPrivate : public ThreadSafeRefCounted<WebCryptoKeyAlgorithmPrivate> { 46 public: 47 WebCryptoKeyAlgorithmPrivate(WebCryptoAlgorithmId id, PassOwnPtr<WebCryptoKeyAlgorithmParams> params) 48 : id(id) 49 , params(params) 50 { 51 } 52 53 WebCryptoAlgorithmId id; 54 OwnPtr<WebCryptoKeyAlgorithmParams> params; 55 }; 56 57 WebCryptoKeyAlgorithm::WebCryptoKeyAlgorithm(WebCryptoAlgorithmId id, PassOwnPtr<WebCryptoKeyAlgorithmParams> params) 58 : m_private(adoptRef(new WebCryptoKeyAlgorithmPrivate(id, params))) 59 { 60 } 61 62 WebCryptoKeyAlgorithm WebCryptoKeyAlgorithm::adoptParamsAndCreate(WebCryptoAlgorithmId id, WebCryptoKeyAlgorithmParams* params) 63 { 64 return WebCryptoKeyAlgorithm(id, adoptPtr(params)); 65 } 66 67 WebCryptoKeyAlgorithm WebCryptoKeyAlgorithm::createAes(WebCryptoAlgorithmId id, unsigned short keyLengthBits) 68 { 69 // FIXME: Verify that id is an AES algorithm. 70 // FIXME: Move this somewhere more general. 71 if (keyLengthBits != 128 && keyLengthBits != 192 && keyLengthBits != 256) 72 return WebCryptoKeyAlgorithm(); 73 return WebCryptoKeyAlgorithm(id, adoptPtr(new WebCryptoAesKeyAlgorithmParams(keyLengthBits))); 74 } 75 76 WebCryptoKeyAlgorithm WebCryptoKeyAlgorithm::createHmac(WebCryptoAlgorithmId hash, unsigned keyLengthBits) 77 { 78 if (!WebCryptoAlgorithm::isHash(hash)) 79 return WebCryptoKeyAlgorithm(); 80 return WebCryptoKeyAlgorithm(WebCryptoAlgorithmIdHmac, adoptPtr(new WebCryptoHmacKeyAlgorithmParams(createHash(hash), keyLengthBits))); 81 } 82 83 WebCryptoKeyAlgorithm WebCryptoKeyAlgorithm::createRsaHashed(WebCryptoAlgorithmId id, unsigned modulusLengthBits, const unsigned char* publicExponent, unsigned publicExponentSize, WebCryptoAlgorithmId hash) 84 { 85 // FIXME: Verify that id is an RSA algorithm which expects a hash 86 if (!WebCryptoAlgorithm::isHash(hash)) 87 return WebCryptoKeyAlgorithm(); 88 return WebCryptoKeyAlgorithm(id, adoptPtr(new WebCryptoRsaHashedKeyAlgorithmParams(modulusLengthBits, publicExponent, publicExponentSize, createHash(hash)))); 89 } 90 91 bool WebCryptoKeyAlgorithm::isNull() const 92 { 93 return m_private.isNull(); 94 } 95 96 WebCryptoAlgorithmId WebCryptoKeyAlgorithm::id() const 97 { 98 ASSERT(!isNull()); 99 return m_private->id; 100 } 101 102 WebCryptoKeyAlgorithmParamsType WebCryptoKeyAlgorithm::paramsType() const 103 { 104 ASSERT(!isNull()); 105 if (!m_private->params.get()) 106 return WebCryptoKeyAlgorithmParamsTypeNone; 107 return m_private->params->type(); 108 } 109 110 WebCryptoAesKeyAlgorithmParams* WebCryptoKeyAlgorithm::aesParams() const 111 { 112 ASSERT(!isNull()); 113 if (paramsType() == WebCryptoKeyAlgorithmParamsTypeAes) 114 return static_cast<WebCryptoAesKeyAlgorithmParams*>(m_private->params.get()); 115 return 0; 116 } 117 118 WebCryptoHmacKeyAlgorithmParams* WebCryptoKeyAlgorithm::hmacParams() const 119 { 120 ASSERT(!isNull()); 121 if (paramsType() == WebCryptoKeyAlgorithmParamsTypeHmac) 122 return static_cast<WebCryptoHmacKeyAlgorithmParams*>(m_private->params.get()); 123 return 0; 124 } 125 126 WebCryptoRsaHashedKeyAlgorithmParams* WebCryptoKeyAlgorithm::rsaHashedParams() const 127 { 128 ASSERT(!isNull()); 129 if (paramsType() == WebCryptoKeyAlgorithmParamsTypeRsaHashed) 130 return static_cast<WebCryptoRsaHashedKeyAlgorithmParams*>(m_private->params.get()); 131 return 0; 132 } 133 134 void WebCryptoKeyAlgorithm::writeToDictionary(WebCryptoKeyAlgorithmDictionary* dict) const 135 { 136 ASSERT(!isNull()); 137 dict->setString("name", WebCryptoAlgorithm::lookupAlgorithmInfo(id())->name); 138 m_private->params.get()->writeToDictionary(dict); 139 } 140 141 void WebCryptoKeyAlgorithm::assign(const WebCryptoKeyAlgorithm& other) 142 { 143 m_private = other.m_private; 144 } 145 146 void WebCryptoKeyAlgorithm::reset() 147 { 148 m_private.reset(); 149 } 150 151 } // namespace blink 152
