projects / apple / security.git / blame
| Commit | Line | Data |
|---|---|---|
| b1ab9ed8 | 1 | /* |
| d8f41ccd | 2 | * Copyright (c) 2000-2001,2011,2013-2014 Apple Inc. All Rights Reserved. |
| b1ab9ed8 A |
3 | * |
| 4 | * The contents of this file constitute Original Code as defined in and are | |
| 5 | * subject to the Apple Public Source License Version 1.2 (the 'License'). | |
| 6 | * You may not use this file except in compliance with the License. Please obtain | |
| 7 | * a copy of the License at http://www.apple.com/publicsource and read it before | |
| 8 | * using this file. | |
| 9 | * | |
| 10 | * This Original Code and all software distributed under the License are | |
| 11 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS | |
| 12 | * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT | |
| 13 | * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR | |
| 14 | * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the | |
| 15 | * specific language governing rights and limitations under the License. | |
| 16 | */ | |
| 17 | ||
| 18 | ||
| 19 | // | |
| 20 | // gladmanContext.h - Gladman AES context class | |
| 21 | // | |
| 22 | #ifndef _H_GLADMAN_CONTEXT | |
| 23 | #define _H_GLADMAN_CONTEXT | |
| 24 | ||
| 25 | #include <security_cdsa_plugin/CSPsession.h> | |
| 26 | #include "AppleCSP.h" | |
| 27 | #include "AppleCSPContext.h" | |
| 28 | #include "AppleCSPSession.h" | |
| 29 | #include "BlockCryptor.h" | |
| 30 | #include <CommonCrypto/CommonCryptor.h> | |
| 427c49bc | 31 | #include <CommonCrypto/CommonCryptorSPI.h> |
| b1ab9ed8 A |
32 | #include "aesCommon.h" |
| 33 | ||
| 34 | #define GLADMAN_BLOCK_SIZE_BYTES DEFAULT_AES_BLOCK_BYTES | |
| 35 | ||
| 36 | /* Symmetric encryption context */ | |
| 37 | class GAESContext : public BlockCryptor { | |
| 38 | public: | |
| 39 | GAESContext(AppleCSPSession &session); | |
| 40 | virtual ~GAESContext(); | |
| 41 | ||
| 42 | // called by CSPFullPluginSession | |
| 43 | void init(const Context &context, bool encoding = true); | |
| 44 | ||
| 45 | // As an optimization, we allow reuse of a modified context. The main thing | |
| 46 | // we avoid is a redundant key scheduling. We save the current raw keys bits | |
| 47 | // in mRawKey and compare on re-init. | |
| 48 | bool changed(const Context &context) { return true; } | |
| 49 | ||
| 50 | // called by BlockCryptor | |
| 51 | void encryptBlock( | |
| 52 | const void *plainText, // length implied (one block) | |
| 53 | size_t plainTextLen, | |
| 54 | void *cipherText, | |
| 55 | size_t &cipherTextLen, // in/out, throws on overflow | |
| 56 | bool final); | |
| 57 | void decryptBlock( | |
| 58 | const void *cipherText, // length implied (one cipher block) | |
| 59 | size_t cipherTextLen, | |
| 60 | void *plainText, | |
| 61 | size_t &plainTextLen, // in/out, throws on overflow | |
| 62 | bool final); | |
| 63 | ||
| 64 | private: | |
| 65 | void deleteKey(); | |
| 66 | ||
| 67 | /* scheduled key */ | |
| 68 | CCCryptorRef mAesKey; | |
| 69 | bool mInitFlag; // for easy reuse | |
| 70 | ||
| 71 | /* | |
| 72 | * Raw key bits saved here and checked on re-init to avoid extra key | |
| 73 | * schedule on re-init. We also have to do a new key schedule if | |
| 74 | * changing between encrypting and decrypting since the key schedules | |
| 75 | * differ for the two. | |
| 76 | */ | |
| 77 | uint8 mRawKey[MAX_AES_KEY_BITS / 8]; | |
| 78 | uint32 mRawKeySize; | |
| 79 | bool mWasEncrypting; | |
| 80 | }; /* AESContext */ | |
| 81 | ||
| 82 | #endif //_H_GLADMAN_CONTEXT |