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1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef BASE_CRYPTO_SYMMETRIC_KEY_H_ | 5 #ifndef BASE_CRYPTO_SYMMETRIC_KEY_H_ |
6 #define BASE_CRYPTO_SYMMETRIC_KEY_H_ | 6 #define BASE_CRYPTO_SYMMETRIC_KEY_H_ |
7 | 7 |
8 #include <string> | 8 #include <string> |
9 | 9 |
10 #include "base/basictypes.h" | 10 #include "base/basictypes.h" |
11 | 11 |
12 #if defined(USE_NSS) | 12 #if defined(USE_NSS) |
13 #include "base/crypto/scoped_nss_types.h" | 13 #include "base/crypto/scoped_nss_types.h" |
14 #elif defined(OS_MACOSX) | 14 #elif defined(OS_MACOSX) |
15 #include <Security/cssmtype.h> | 15 #include <Security/cssmtype.h> |
| 16 #elif defined(OS_WIN) |
| 17 #include "base/crypto/scoped_capi_types.h" |
16 #endif | 18 #endif |
17 | 19 |
18 namespace base { | 20 namespace base { |
19 | 21 |
20 // Wraps a platform-specific symmetric key and allows it to be held in a | 22 // Wraps a platform-specific symmetric key and allows it to be held in a |
21 // scoped_ptr. | 23 // scoped_ptr. |
22 class SymmetricKey { | 24 class SymmetricKey { |
23 public: | 25 public: |
24 enum Algorithm { | 26 enum Algorithm { |
25 AES, | 27 AES, |
(...skipping 13 matching lines...) Expand all Loading... |
39 static SymmetricKey* DeriveKeyFromPassword(Algorithm algorithm, | 41 static SymmetricKey* DeriveKeyFromPassword(Algorithm algorithm, |
40 const std::string& password, | 42 const std::string& password, |
41 const std::string& salt, | 43 const std::string& salt, |
42 size_t iterations, | 44 size_t iterations, |
43 size_t key_size_in_bits); | 45 size_t key_size_in_bits); |
44 | 46 |
45 #if defined(USE_NSS) | 47 #if defined(USE_NSS) |
46 PK11SymKey* key() const { return key_.get(); } | 48 PK11SymKey* key() const { return key_.get(); } |
47 #elif defined(OS_MACOSX) | 49 #elif defined(OS_MACOSX) |
48 CSSM_DATA cssm_data() const; | 50 CSSM_DATA cssm_data() const; |
| 51 #elif defined(OS_WIN) |
| 52 HCRYPTPROV prov() const { return provider_.get(); } |
| 53 HCRYPTKEY key() const { return key_.get(); } |
49 #endif | 54 #endif |
50 | 55 |
51 // Extracts the raw key from the platform specific data. This should only be | 56 // Extracts the raw key from the platform specific data. This should only be |
52 // done in unit tests to verify that keys are generated correctly. | 57 // done in unit tests to verify that keys are generated correctly. |
53 bool GetRawKey(std::string* raw_key); | 58 bool GetRawKey(std::string* raw_key); |
54 | 59 |
55 private: | 60 private: |
56 #if defined(USE_NSS) | 61 #if defined(USE_NSS) |
57 explicit SymmetricKey(PK11SymKey* key) : key_(key) {} | 62 explicit SymmetricKey(PK11SymKey* key) : key_(key) {} |
58 ScopedPK11SymKey key_; | 63 ScopedPK11SymKey key_; |
59 #elif defined(OS_MACOSX) | 64 #elif defined(OS_MACOSX) |
60 SymmetricKey(const void* key_data, size_t key_size_in_bits); | 65 SymmetricKey(const void* key_data, size_t key_size_in_bits); |
61 std::string key_; | 66 std::string key_; |
| 67 #elif defined(OS_WIN) |
| 68 SymmetricKey(HCRYPTPROV provider, HCRYPTKEY key, const void* key_data, |
| 69 size_t key_size_in_bytes) : provider_(provider), key_(key) { |
| 70 if (key_data) { |
| 71 raw_key_.assign(reinterpret_cast<const char*>(key_data), |
| 72 key_size_in_bytes); |
| 73 } |
| 74 } |
| 75 |
| 76 ScopedHCRYPTPROV provider_; |
| 77 ScopedHCRYPTKEY key_; |
| 78 |
| 79 // Contains the raw key, if it is known during initialization and when it |
| 80 // is likely that the associated |provider_| will be unable to export the |
| 81 // |key_|. This is the case of HMAC keys when the key size exceeds 16 bytes |
| 82 // when using the default RSA provider. |
| 83 // TODO(rsleevi): See if KP_EFFECTIVE_KEYLEN is the reason why CryptExportKey |
| 84 // fails with NTE_BAD_KEY/NTE_BAD_LEN |
| 85 std::string raw_key_; |
62 #endif | 86 #endif |
63 | 87 |
64 DISALLOW_COPY_AND_ASSIGN(SymmetricKey); | 88 DISALLOW_COPY_AND_ASSIGN(SymmetricKey); |
65 }; | 89 }; |
66 | 90 |
67 } // namespace base | 91 } // namespace base |
68 | 92 |
69 #endif // BASE_CRYPTO_SYMMETRIC_KEY_H_ | 93 #endif // BASE_CRYPTO_SYMMETRIC_KEY_H_ |
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