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https://github.com/VCMP-SqMod/SqMod.git
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4a6bfc086c
Switched to POCO library for unified platform/library interface. Deprecated the external module API. It was creating more problems than solving. Removed most built-in libraries in favor of system libraries for easier maintenance. Cleaned and secured code with help from static analyzers.
160 lines
4.2 KiB
C
160 lines
4.2 KiB
C
/*
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* << Haru Free PDF Library >> -- hpdf_encrypt.h
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*
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* URL: http://libharu.org
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*
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* Copyright (c) 1999-2006 Takeshi Kanno <takeshi_kanno@est.hi-ho.ne.jp>
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* Copyright (c) 2007-2009 Antony Dovgal <tony@daylessday.org>
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*
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* Permission to use, copy, modify, distribute and sell this software
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* and its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and
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* that both that copyright notice and this permission notice appear
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* in supporting documentation.
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* It is provided "as is" without express or implied warranty.
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*
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*------------------------------------------------------------------------------
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*
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* The code implements MD5 message-digest algorithm is based on the code
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* written by Colin Plumb.
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* The copyright of it is as follows.
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*
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* This code implements the MD5 message-digest algorithm.
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* The algorithm is due to Ron Rivest. This code was
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* written by Colin Plumb in 1993, no copyright is claimed.
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* This code is in the public domain; do with it what you wish.
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*
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* Equivalent code is available from RSA Data Security, Inc.
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* This code has been tested against that, and is equivalent,
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* except that you don't need to include two pages of legalese
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* with every copy.
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*
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* To compute the message digest of a chunk of bytes, declare an
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* MD5Context structure, pass it to MD5Init, call MD5Update as
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* needed on buffers full of bytes, and then call MD5Final, which
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* will fill a supplied 16-byte array with the digest.
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*
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*---------------------------------------------------------------------------*/
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#ifndef HPDF_ENCRYPT_H
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#define HPDF_ENCRYPT_H
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#include "hpdf_mmgr.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*----------------------------------------------------------------------------*/
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/*----- encrypt-dict ---------------------------------------------------------*/
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#define HPDF_ID_LEN 16
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#define HPDF_PASSWD_LEN 32
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#define HPDF_ENCRYPT_KEY_MAX 16
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#define HPDF_MD5_KEY_LEN 16
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#define HPDF_PERMISSION_PAD 0xFFFFFFC0
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#define HPDF_ARC4_BUF_SIZE 256
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typedef struct HPDF_MD5Context
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{
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HPDF_UINT32 buf[4];
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HPDF_UINT32 bits[2];
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HPDF_BYTE in[64];
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} HPDF_MD5_CTX;
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typedef struct _HPDF_ARC4_Ctx_Rec {
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HPDF_BYTE idx1;
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HPDF_BYTE idx2;
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HPDF_BYTE state[HPDF_ARC4_BUF_SIZE];
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} HPDF_ARC4_Ctx_Rec;
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typedef struct _HPDF_Encrypt_Rec *HPDF_Encrypt;
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typedef struct _HPDF_Encrypt_Rec {
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HPDF_EncryptMode mode;
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/* key_len must be a multiple of 8, and between 40 to 128 */
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HPDF_UINT key_len;
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/* owner-password (not encrypted) */
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HPDF_BYTE owner_passwd[HPDF_PASSWD_LEN];
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/* user-password (not encrypted) */
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HPDF_BYTE user_passwd[HPDF_PASSWD_LEN];
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/* owner-password (encrypted) */
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HPDF_BYTE owner_key[HPDF_PASSWD_LEN];
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/* user-password (encrypted) */
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HPDF_BYTE user_key[HPDF_PASSWD_LEN];
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HPDF_INT permission;
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HPDF_BYTE encrypt_id[HPDF_ID_LEN];
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HPDF_BYTE encryption_key[HPDF_MD5_KEY_LEN + 5];
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HPDF_BYTE md5_encryption_key[HPDF_MD5_KEY_LEN];
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HPDF_ARC4_Ctx_Rec arc4ctx;
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} HPDF_Encrypt_Rec;
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void
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HPDF_MD5Init (struct HPDF_MD5Context *ctx);
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void
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HPDF_MD5Update (struct HPDF_MD5Context *ctx,
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const HPDF_BYTE *buf,
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HPDF_UINT32 len);
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void
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HPDF_MD5Final (HPDF_BYTE digest[16],
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struct HPDF_MD5Context *ctx);
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void
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HPDF_PadOrTrancatePasswd (const char *pwd,
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HPDF_BYTE *new_pwd);
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void
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HPDF_Encrypt_Init (HPDF_Encrypt attr);
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void
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HPDF_Encrypt_CreateUserKey (HPDF_Encrypt attr);
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void
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HPDF_Encrypt_CreateOwnerKey (HPDF_Encrypt attr);
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void
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HPDF_Encrypt_CreateEncryptionKey (HPDF_Encrypt attr);
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void
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HPDF_Encrypt_InitKey (HPDF_Encrypt attr,
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HPDF_UINT32 object_id,
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HPDF_UINT16 gen_no);
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void
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HPDF_Encrypt_Reset (HPDF_Encrypt attr);
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void
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HPDF_Encrypt_CryptBuf (HPDF_Encrypt attr,
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const HPDF_BYTE *src,
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HPDF_BYTE *dst,
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HPDF_UINT len);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* _HPDF_ENCRYPT_H */
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