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1 /* | 1 /* |
2 * Copyright (C) 2013 Google Inc. All rights reserved. | 2 * Copyright (C) 2013 Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
6 * met: | 6 * met: |
7 * | 7 * |
8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
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33 | 33 |
34 #include "bindings/v8/ExceptionState.h" | 34 #include "bindings/v8/ExceptionState.h" |
35 #include "core/dom/ExceptionCode.h" | 35 #include "core/dom/ExceptionCode.h" |
36 #include "core/platform/NotImplemented.h" | 36 #include "core/platform/NotImplemented.h" |
37 #include "modules/crypto/CryptoOperation.h" | 37 #include "modules/crypto/CryptoOperation.h" |
38 #include "modules/crypto/Key.h" | 38 #include "modules/crypto/Key.h" |
39 #include "modules/crypto/KeyOperation.h" | 39 #include "modules/crypto/KeyOperation.h" |
40 #include "modules/crypto/NormalizeAlgorithm.h" | 40 #include "modules/crypto/NormalizeAlgorithm.h" |
41 #include "public/platform/Platform.h" | 41 #include "public/platform/Platform.h" |
42 #include "public/platform/WebCrypto.h" | 42 #include "public/platform/WebCrypto.h" |
43 #include "public/platform/WebCryptoAlgorithmParams.h" | |
43 #include "wtf/ArrayBufferView.h" | 44 #include "wtf/ArrayBufferView.h" |
44 | 45 |
45 namespace WebCore { | 46 namespace WebCore { |
46 | 47 |
47 // FIXME: Outstanding KeyOperations and CryptoOperations should be aborted when | 48 // FIXME: Outstanding KeyOperations and CryptoOperations should be aborted when |
48 // tearing down SubtleCrypto (to avoid problems completing a | 49 // tearing down SubtleCrypto (to avoid problems completing a |
49 // ScriptPromiseResolver which is no longer valid). | 50 // ScriptPromiseResolver which is no longer valid). |
50 | 51 |
51 namespace { | 52 namespace { |
52 | 53 |
53 bool keyCanBeUsedForAlgorithm(const WebKit::WebCryptoKey& key, const WebKit::Web CryptoAlgorithm& algorithm, ExceptionState& es) | 54 WebKit::WebCryptoKeyUsageMask toKeyUsage(AlgorithmOperation operation) |
54 { | 55 { |
55 // FIXME: Need to enforce that the key's algorithm matches the operation, | 56 switch (operation) { |
56 // and that the key's usages allow it to be used with this operation. | 57 case Encrypt: |
57 notImplemented(); | 58 return WebKit::WebCryptoKeyUsageEncrypt; |
58 return true; | 59 case Decrypt: |
60 return WebKit::WebCryptoKeyUsageDecrypt; | |
61 case Sign: | |
62 return WebKit::WebCryptoKeyUsageSign; | |
63 case Verify: | |
64 return WebKit::WebCryptoKeyUsageVerify; | |
65 case DeriveKey: | |
66 return WebKit::WebCryptoKeyUsageDeriveKey; | |
67 case WrapKey: | |
68 return WebKit::WebCryptoKeyUsageWrapKey; | |
69 case UnwrapKey: | |
70 return WebKit::WebCryptoKeyUsageUnwrapKey; | |
71 case Digest: | |
72 case GenerateKey: | |
73 case ImportKey: | |
74 case NumberOfAlgorithmOperations: | |
75 break; | |
76 } | |
77 | |
78 ASSERT_NOT_REACHED(); | |
79 return 0; | |
80 } | |
81 | |
82 bool keyCanBeUsedForAlgorithm(const WebKit::WebCryptoKey& key, const WebKit::Web CryptoAlgorithm& algorithm, AlgorithmOperation op) | |
83 { | |
84 if ((key.usages() & toKeyUsage(op)) == 0) | |
abarth-chromium
2013/08/01 02:01:22
(key.usages() & toKeyUsage(op)) == 0 -> !(k
eroman
2013/08/01 02:57:43
Done.
| |
85 return false; | |
86 | |
87 if (key.algorithm().id() != algorithm.id()) | |
88 return false; | |
89 | |
90 if (key.algorithm().paramsType() == WebKit::WebCryptoAlgorithmParamsTypeNone ) | |
91 return true; | |
92 | |
93 // Verify that the algorithm-specific parameters for the key conform to the | |
94 // algorithm. | |
95 | |
96 if (key.algorithm().paramsType() == WebKit::WebCryptoAlgorithmParamsTypeHmac Params) { | |
97 return key.algorithm().hmacParams()->hash().id() == algorithm.hmacParams ()->hash().id(); | |
98 } | |
99 | |
100 ASSERT_NOT_REACHED(); | |
101 return false; | |
59 } | 102 } |
60 | 103 |
61 PassRefPtr<CryptoOperation> createCryptoOperation(const Dictionary& rawAlgorithm , Key* key, AlgorithmOperation operationType, ExceptionState& es) | 104 PassRefPtr<CryptoOperation> createCryptoOperation(const Dictionary& rawAlgorithm , Key* key, AlgorithmOperation operationType, ExceptionState& es) |
62 { | 105 { |
63 WebKit::WebCrypto* platformCrypto = WebKit::Platform::current()->crypto(); | 106 WebKit::WebCrypto* platformCrypto = WebKit::Platform::current()->crypto(); |
64 if (!platformCrypto) { | 107 if (!platformCrypto) { |
65 es.throwDOMException(NotSupportedError); | 108 es.throwDOMException(NotSupportedError); |
66 return 0; | 109 return 0; |
67 } | 110 } |
68 | 111 |
69 WebKit::WebCryptoAlgorithm algorithm; | 112 WebKit::WebCryptoAlgorithm algorithm; |
70 if (!normalizeAlgorithm(rawAlgorithm, operationType, algorithm, es)) | 113 if (!normalizeAlgorithm(rawAlgorithm, operationType, algorithm, es)) |
71 return 0; | 114 return 0; |
72 | 115 |
73 // All operations other than Digest require a valid Key. | 116 // All operations other than Digest require a valid Key. |
74 if (operationType != Digest) { | 117 if (operationType != Digest) { |
75 if (!key) { | 118 if (!key) { |
76 es.throwDOMException(TypeError); | 119 es.throwDOMException(TypeError); |
77 return 0; | 120 return 0; |
78 } | 121 } |
79 | 122 |
80 if (!keyCanBeUsedForAlgorithm(key->key(), algorithm, es)) { | 123 if (!keyCanBeUsedForAlgorithm(key->key(), algorithm, operationType)) { |
124 es.throwDOMException(NotSupportedError); | |
81 return 0; | 125 return 0; |
82 } | 126 } |
83 } | 127 } |
84 | 128 |
85 RefPtr<CryptoOperationImpl> opImpl = CryptoOperationImpl::create(); | 129 RefPtr<CryptoOperationImpl> opImpl = CryptoOperationImpl::create(); |
86 WebKit::WebCryptoOperationResult result(opImpl.get()); | 130 WebKit::WebCryptoOperationResult result(opImpl.get()); |
87 | 131 |
88 switch (operationType) { | 132 switch (operationType) { |
89 case Encrypt: | 133 case Encrypt: |
90 platformCrypto->encrypt(algorithm, key->key(), result); | 134 platformCrypto->encrypt(algorithm, key->key(), result); |
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172 | 216 |
173 const unsigned char* keyDataBytes = static_cast<unsigned char*>(keyData->bas eAddress()); | 217 const unsigned char* keyDataBytes = static_cast<unsigned char*>(keyData->bas eAddress()); |
174 | 218 |
175 RefPtr<KeyOperation> keyOp = KeyOperation::create(); | 219 RefPtr<KeyOperation> keyOp = KeyOperation::create(); |
176 WebKit::WebCryptoKeyOperationResult result(keyOp.get()); | 220 WebKit::WebCryptoKeyOperationResult result(keyOp.get()); |
177 platformCrypto->importKey(format, keyDataBytes, keyData->byteLength(), algor ithm, extractable, keyUsages, result); | 221 platformCrypto->importKey(format, keyDataBytes, keyData->byteLength(), algor ithm, extractable, keyUsages, result); |
178 return keyOp->returnValue(es); | 222 return keyOp->returnValue(es); |
179 } | 223 } |
180 | 224 |
181 } // namespace WebCore | 225 } // namespace WebCore |
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