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74 lines
1.7 KiB
Objective-C
74 lines
1.7 KiB
Objective-C
/*
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* PDFEncryptionUtils.h
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*
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* Copyright (c) 2017-present, MacPaw Inc. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*/
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#import <Foundation/Foundation.h>
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#import "../CSHandle.h"
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#import "../CSBlockStreamHandle.h"
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#import "../Crypto/md5.h"
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#import "../Crypto/aes.h"
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extern NSString *PDFMD5FinishedException;
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@interface PDFMD5Engine:NSObject
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{
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MD5_CTX md5;
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unsigned char digest_bytes[16];
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BOOL done;
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}
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+(PDFMD5Engine *)engine;
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+(NSData *)digestForData:(NSData *)data;
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+(NSData *)digestForBytes:(const void *)bytes length:(int)length;
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-(id)init;
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-(void)updateWithData:(NSData *)data;
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-(void)updateWithBytes:(const void *)bytes length:(unsigned long)length;
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-(NSData *)digest;
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-(NSString *)hexDigest;
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-(NSString *)description;
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@end
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@interface PDFAESHandle:CSBlockStreamHandle
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{
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off_t startoffs;
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NSData *key,*iv;
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aes_decrypt_ctx aes;
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uint8_t ivbuffer[16],streambuffer[16];
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}
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-(id)initWithHandle:(CSHandle *)handle key:(NSData *)keydata;
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-(void)dealloc;
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-(void)resetBlockStream;
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-(int)produceBlockAtOffset:(off_t)pos;
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@end
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