cipher.h

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00001 /*
00002   Copyright 1999-2010 ImageMagick Studio LLC, a non-profit organization
00003   dedicated to making software imaging solutions freely available.
00004 
00005   You may not use this file except in compliance with the License.
00006   obtain a copy of the License at
00007 
00008     http://www.wizards-toolkit.org/script/license.php
00009 
00010   Unless required by applicable law or agreed to in writing, software
00011   distributed under the License is distributed on an "AS IS" BASIS,
00012   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013   See the License for the specific language governing permissions and
00014   limitations under the License.
00015 
00016   Wizard's Toolkit secure cipher algorithm methods.
00017 */
00018 #ifndef _WIZARDSTOOLKIT_CIPHER_H
00019 #define _WIZARDSTOOLKIT_CIPHER_H
00020 
00021 #if defined(__cplusplus) || defined(c_plusplus)
00022 extern "C" {
00023 #endif
00024 
00025 #include "wizard/random_.h"
00026 
00027 #define MaxCipherBlocksize  128
00028 
00029 typedef enum
00030 {
00031   UndefinedMode,
00032   CBCMode,
00033   CFBMode,
00034   CTRMode,
00035   ECBMode,
00036   OFBMode
00037 } CipherMode;
00038 
00039 typedef enum
00040 {
00041   UndefinedCipher,
00042   NoCipher,
00043   AESCipher,
00044   SerpentCipher,
00045   TwofishCipher
00046 } CipherType;
00047 
00048 typedef struct _CipherInfo
00049   CipherInfo;
00050 
00051 extern WizardExport CipherInfo
00052   *AcquireCipherInfo(const CipherType,const CipherMode),
00053   *DestroyCipherInfo(CipherInfo *);
00054 
00055 extern WizardExport const StringInfo
00056   *GetCipherNonce(CipherInfo *);
00057 
00058 extern WizardExport StringInfo
00059   *DecipherCipher(CipherInfo *,StringInfo *),
00060   *EncipherCipher(CipherInfo *,StringInfo *),
00061   *GenerateCipherNonce(CipherInfo *);
00062 
00063 extern WizardExport size_t
00064   GetCipherBlocksize(const CipherInfo *);
00065 
00066 extern WizardExport void
00067   ResetCipherNonce(CipherInfo *),
00068   SetCipherNonce(CipherInfo *,const StringInfo *),
00069   SetCipherKey(CipherInfo *,const StringInfo *);
00070 
00071 /*
00072   Deprecated methods.
00073 */
00074 extern WizardExport StringInfo
00075   *DecryptCipher(CipherInfo *,StringInfo *),
00076   *EncryptCipher(CipherInfo *,StringInfo *);
00077 
00078 #if defined(__cplusplus) || defined(c_plusplus)
00079 }
00080 #endif
00081 
00082 #endif