Annotation of /linden_release/linden/indra/llmessage/llcipher.h
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| 1 : | mjm | 57 | /** |
| 2 : | * @file llcipher.h | ||
| 3 : | * @brief Abstract base class for encryption ciphers. | ||
| 4 : | * | ||
| 5 : | * $LicenseInfo:firstyear=2003&license=viewergpl$ | ||
| 6 : | * | ||
| 7 : | * Copyright (c) 2003-2008, Linden Research, Inc. | ||
| 8 : | * | ||
| 9 : | * Second Life Viewer Source Code | ||
| 10 : | * The source code in this file ("Source Code") is provided by Linden Lab | ||
| 11 : | * to you under the terms of the GNU General Public License, version 2.0 | ||
| 12 : | * ("GPL"), unless you have obtained a separate licensing agreement | ||
| 13 : | * ("Other License"), formally executed by you and Linden Lab. Terms of | ||
| 14 : | * the GPL can be found in doc/GPL-license.txt in this distribution, or | ||
| 15 : | * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2 | ||
| 16 : | * | ||
| 17 : | * There are special exceptions to the terms and conditions of the GPL as | ||
| 18 : | * it is applied to this Source Code. View the full text of the exception | ||
| 19 : | * in the file doc/FLOSS-exception.txt in this software distribution, or | ||
| 20 : | * online at http://secondlifegrid.net/programs/open_source/licensing/flossexception | ||
| 21 : | * | ||
| 22 : | * By copying, modifying or distributing this software, you acknowledge | ||
| 23 : | * that you have read and understood your obligations described above, | ||
| 24 : | * and agree to abide by those obligations. | ||
| 25 : | * | ||
| 26 : | * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO | ||
| 27 : | * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY, | ||
| 28 : | * COMPLETENESS OR PERFORMANCE. | ||
| 29 : | * $/LicenseInfo$ | ||
| 30 : | */ | ||
| 31 : | |||
| 32 : | #ifndef LLCIPHER_H | ||
| 33 : | #define LLCIPHER_H | ||
| 34 : | |||
| 35 : | //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | ||
| 36 : | // Class LLCipher | ||
| 37 : | // | ||
| 38 : | // Abstract base class for a cipher object. | ||
| 39 : | //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | ||
| 40 : | |||
| 41 : | class LLCipher | ||
| 42 : | { | ||
| 43 : | public: | ||
| 44 : | virtual ~LLCipher() {} | ||
| 45 : | |||
| 46 : | // encrypt src and place result into dst. returns TRUE if | ||
| 47 : | // Returns number of bytes written into dst, or 0 on error. | ||
| 48 : | virtual U32 encrypt(const U8* src, U32 src_len, U8* dst, U32 dst_len) = 0; | ||
| 49 : | |||
| 50 : | // decrypt src and place result into dst. | ||
| 51 : | // Returns number of bytes written into dst, or 0 on error. | ||
| 52 : | virtual U32 decrypt(const U8* src, U32 src_len, U8* dst, U32 dst_len) = 0; | ||
| 53 : | |||
| 54 : | // returns the minimum amount of space required to encrypt for a | ||
| 55 : | // unencrypted source buffer of length len. | ||
| 56 : | // *NOTE: This is estimated space and you should check the return value | ||
| 57 : | // of the encrypt function. | ||
| 58 : | virtual U32 requiredEncryptionSpace(U32 src_len) const = 0 ; | ||
| 59 : | }; | ||
| 60 : | |||
| 61 : | #endif |
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