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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 WebCryptoKey_h |
| 32 #define WebCryptoKey_h |
| 33 |
| 34 #include "WebCommon.h" |
| 35 #include "WebPrivatePtr.h" |
| 36 |
| 37 namespace WebKit { |
| 38 |
| 39 enum WebCryptoKeyType { |
| 40 WebCryptoKeyTypeSecret, |
| 41 WebCryptoKeyTypePublic, |
| 42 WebCryptoKeyTypePrivate, |
| 43 }; |
| 44 |
| 45 enum WebCryptoKeyUsage { |
| 46 WebCryptoKeyUsageEncrypt = 1 << 0, |
| 47 WebCryptoKeyUsageDecrypt = 1 << 1, |
| 48 WebCryptoKeyUsageSign = 1 << 2, |
| 49 WebCryptoKeyUsageVerify = 1 << 3, |
| 50 WebCryptoKeyUsageDerive = 1 << 4, |
| 51 WebCryptoKeyUsageWrap = 1 << 5, |
| 52 WebCryptoKeyUsageUnwrap = 1 << 6, |
| 53 #if WEBKIT_IMPLEMENTATION |
| 54 EndOfWebCryptoKeyUsage, |
| 55 #endif |
| 56 }; |
| 57 |
| 58 // A bitfield of WebCryptoKeyUsage |
| 59 typedef int WebCryptoKeyUsageMask; |
| 60 |
| 61 class WebCryptoAlgorithm; |
| 62 class WebCryptoKeyPrivate; |
| 63 class WebCryptoKeyHandle; |
| 64 |
| 65 // The WebCryptoKey represents a key from the Web Crypto API: |
| 66 // |
| 67 // https://dvcs.w3.org/hg/webcrypto-api/raw-file/tip/spec/Overview.html#key-inte
rface |
| 68 // |
| 69 // WebCryptoKey is just a reference-counted wrapper that manages the lifetime of |
| 70 // a "WebCryptoKeyHandle*". |
| 71 // |
| 72 // WebCryptoKey is: |
| 73 // * Copiable (cheaply) |
| 74 // * Threadsafe if the embedder's WebCryptoKeyHandle is also threadsafe. |
| 75 // |
| 76 // The embedder is responsible for creating all WebCryptoKeys, and therefore can |
| 77 // safely assume any details regarding the type of the wrapped |
| 78 // WebCryptoKeyHandle*. |
| 79 // |
| 80 // FIXME: Define the interface to use for structured clone. |
| 81 // Cloning across a process boundary will need serialization, |
| 82 // however cloning for in-process workers could just share the same |
| 83 // (threadsafe) handle. |
| 84 class WebCryptoKey { |
| 85 public: |
| 86 ~WebCryptoKey() { reset(); } |
| 87 |
| 88 WebCryptoKey(const WebCryptoKey& other) { assign(other); } |
| 89 WebCryptoKey& operator=(const WebCryptoKey& other) |
| 90 { |
| 91 assign(other); |
| 92 return *this; |
| 93 } |
| 94 |
| 95 // For an explanation of these parameters see: |
| 96 // https://dvcs.w3.org/hg/webcrypto-api/raw-file/tip/spec/Overview.html#key-
interface-members |
| 97 // |
| 98 // Note that the caller is passing ownership of the WebCryptoKeyHandle*. |
| 99 WEBKIT_EXPORT static WebCryptoKey create(WebCryptoKeyHandle*, WebCryptoKeyTy
pe, bool extractable, const WebCryptoAlgorithm&, WebCryptoKeyUsageMask); |
| 100 |
| 101 // Returns the opaque key handle that was set by the embedder. |
| 102 // * Safe to downcast to known type (since embedder creates all the keys) |
| 103 // * Returned pointer's lifetime is bound to |this| |
| 104 WEBKIT_EXPORT WebCryptoKeyHandle* handle() const; |
| 105 |
| 106 WEBKIT_EXPORT WebCryptoKeyType type() const; |
| 107 WEBKIT_EXPORT bool extractable() const; |
| 108 WEBKIT_EXPORT const WebCryptoAlgorithm& algorithm() const; |
| 109 WEBKIT_EXPORT WebCryptoKeyUsageMask keyUsage() const; |
| 110 |
| 111 private: |
| 112 WebCryptoKey() { } |
| 113 WEBKIT_EXPORT void assign(const WebCryptoKey& other); |
| 114 WEBKIT_EXPORT void reset(); |
| 115 |
| 116 WebPrivatePtr<WebCryptoKeyPrivate> m_private; |
| 117 }; |
| 118 |
| 119 // Base class for the embedder to define its own opaque key handle. The lifetime |
| 120 // of this object is controlled by WebCryptoKey using reference counting. |
| 121 class WebCryptoKeyHandle { |
| 122 public: |
| 123 virtual ~WebCryptoKeyHandle() { } |
| 124 }; |
| 125 |
| 126 } // namespace WebKit |
| 127 |
| 128 #endif |
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