signature.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.imagemagick.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   MagickCore digital signature methods.
00017 */
00018 #ifndef _MAGICKCORE_SIGNATURE_H
00019 #define _MAGICKCORE_SIGNATURE_H
00020 
00021 #if defined(__cplusplus) || defined(c_plusplus)
00022 extern "C" {
00023 #endif
00024 
00025 #define MagickSignatureSize  64
00026 
00027 typedef struct _SignatureInfo
00028 {
00029   unsigned long
00030     digest[8],
00031     low_order,
00032     high_order;
00033 
00034   long
00035     offset;
00036 
00037   unsigned char
00038     message[MagickSignatureSize];
00039 
00040   MagickBooleanType
00041     lsb_first;
00042 
00043   unsigned long
00044     signature;
00045 } SignatureInfo;
00046 
00047 extern MagickExport MagickBooleanType
00048   SignatureImage(Image *);
00049 
00050 extern MagickExport void
00051   FinalizeSignature(SignatureInfo *),
00052   GetSignatureInfo(SignatureInfo *),
00053   UpdateSignature(SignatureInfo *,const unsigned char *,const size_t);
00054 
00055 #if defined(__cplusplus) || defined(c_plusplus)
00056 }
00057 #endif
00058 
00059 #endif

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