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pjs/lib/libmsg/ap_decod.c

1777 строки
40 KiB
C
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
/*
*
* apple_double_decode.c
*
* ---------------------
*
* Codes for decoding Apple Single/Double object parts.
*
* 05aug95 mym Created.
* 25sep95 mym Add support to write to binhex encoding on non-mac system.
*/
#include "msg.h"
#include "appledbl.h"
#include "ad_codes.h"
#include "m_binhex.h"
#ifdef XP_MAC
#include <StandardFile.h>
#endif
extern int MK_UNABLE_TO_OPEN_TMP_FILE;
extern int MK_MIME_ERROR_WRITING_FILE;
/*
** Static functions.
*/
PRIVATE int from_decoder(appledouble_decode_object* p_ap_decode_obj,
char *buff,
int buff_size,
uint32 *in_count);
PRIVATE int from_64(appledouble_decode_object* p_ap_decode_obj,
char *buff,
int size,
uint32 *real_size);
PRIVATE int from_qp(appledouble_decode_object* p_ap_decode_obj,
char *buff,
int size,
uint32 *real_size);
PRIVATE int from_uu(appledouble_decode_object* p_ap_decode_obj,
char *buff,
int size,
uint32 *real_size);
PRIVATE int from_none(appledouble_decode_object* p_ap_decode_obj,
char *buff,
int size,
uint32 *real_size);
PRIVATE int decoder_seek(appledouble_decode_object* p_ap_decode_obj,
int seek_pos,
int start_pos);
/*
** fetch_a_line
** -------------
**
** get a line from the in stream..
*/
int fetch_a_line(
appledouble_decode_object* p_ap_decode_obj,
char *buff)
{
int i, left;
char *p, c = 0;
if (p_ap_decode_obj->s_leftover == 0 &&
p_ap_decode_obj->s_inbuff <= p_ap_decode_obj->pos_inbuff)
{
*buff = '\0';
return errEOB;
}
if (p_ap_decode_obj->s_leftover)
{
for (p = p_ap_decode_obj->b_leftover, i = p_ap_decode_obj->s_leftover; i>0; i--)
*buff++ = *p++;
p_ap_decode_obj->s_leftover = 0;
}
p = p_ap_decode_obj->inbuff + p_ap_decode_obj->pos_inbuff;
left = p_ap_decode_obj->s_inbuff - p_ap_decode_obj->pos_inbuff;
for (i = 0; i < left; )
{
c = *p++; i++;
if (c == CR && *p == LF)
{
p++; i++; /* make sure skip both LF & CR */
}
if (c == LF || c == CR)
break;
*buff++ = c;
}
p_ap_decode_obj->pos_inbuff += i;
if (i == left && c != LF && c != CR)
{
/*
** we meet the buff end before we can terminate the string,
** save the string to the left_over buff.
*/
p_ap_decode_obj->s_leftover = i;
for (p = p_ap_decode_obj->b_leftover; i>0; i--)
*p++ = *(buff-i);
return errEOB;
}
*buff = '\0';
return NOERR;
}
void parse_param(
char *p,
char **param, /* the param */
char **define, /* the defination. */
char **np) /* next position. */
{
while (*p == ' ' || *p == '\"' || *p == ';') p++;
*param = p;
while (*p != ' ' && *p != '=' ) p++;
if (*p == ' ')
*define = p+1;
else
*define = p+2;
while (*p && *p != ';') p++;
if (*p == ';')
*np = p + 1;
else
*np = p;
}
int ap_seek_part_start(
appledouble_decode_object* p_ap_decode_obj)
{
int status;
char newline[256];
while (1)
{
status = fetch_a_line(p_ap_decode_obj, newline);
if(status != NOERR)
break;
if (newline[0] == '\0' && p_ap_decode_obj->boundary0 != NULL)
return errDone;
if (!XP_STRNCASECMP(newline, "--", 2))
{
/* we meet the start seperator, copy it and it will be our boundary */
p_ap_decode_obj->boundary0 = XP_STRDUP(newline+2);
return errDone;
}
}
return status;
}
int ParseFileHeader(
appledouble_decode_object *p_ap_decode_obj)
{
int status;
int i;
char newline[256], *p;
char *param, *define;
while (1)
{
status = fetch_a_line(p_ap_decode_obj, newline);
if (newline[0] == '\0')
break; /* we get the end of a defination section. */
p = newline;
while (1)
{
parse_param(p, &param, &define, &p);
/*
** we only care about these params.
*/
if (!XP_STRNCASECMP(param, "Content-Type:", 13))
{
if (!XP_STRNCASECMP(define, MULTIPART_APPLEDOUBLE,
XP_STRLEN(MULTIPART_APPLEDOUBLE)) ||
!XP_STRNCASECMP(define, MULTIPART_HEADER_SET,
XP_STRLEN(MULTIPART_HEADER_SET)))
p_ap_decode_obj->messagetype = kAppleDouble;
else
p_ap_decode_obj->messagetype = kGeneralMine;
}
else if (!XP_STRNCASECMP(param, "boundary=", 9))
{
for (i = 0; *define && *define != '\"'; )
p_ap_decode_obj->boundary0[i++] = *define++;
p_ap_decode_obj->boundary0[i] = '\0';
}
else if (!XP_STRNCASECMP(param, "Content-Disposition:", 20))
{
if (!XP_STRNCASECMP(define, "inline", 5))
p_ap_decode_obj->deposition = kInline;
else
p_ap_decode_obj->deposition = kDontCare;
}
else if (!XP_STRNCASECMP(param, "filename=", 9))
{
for (i = 0, p=define; *p && *p != '\"'; )
p_ap_decode_obj->fname[i++] = *p++;
p_ap_decode_obj->fname[i] = '\0';
}
if (*p == '\0')
break;
}
}
return NOERR;
}
int ap_seek_to_boundary(
appledouble_decode_object *p_ap_decode_obj,
XP_Bool firstime)
{
int status = NOERR;
char buff[256];
while (status == NOERR)
{
status = fetch_a_line(p_ap_decode_obj, buff);
if (status != NOERR)
break;
if ((!XP_STRNCASECMP(buff, "--", 2) &&
!XP_STRNCASECMP( buff+2,
p_ap_decode_obj->boundary0,
XP_STRLEN(p_ap_decode_obj->boundary0)))
||!XP_STRNCASECMP( buff,
p_ap_decode_obj->boundary0,
XP_STRLEN(p_ap_decode_obj->boundary0)))
{
TRACEMSG(("Found boundary: %s", p_ap_decode_obj->boundary0));
status = errDone;
break;
}
}
if (firstime && status == errEOB)
status = NOERR; /* so we can do it again. */
return status;
}
int ap_parse_header(
appledouble_decode_object *p_ap_decode_obj,
XP_Bool firstime)
{
int status, i;
char newline[256], *p;
char *param, *define;
if (firstime)
{
/* do the clean ups. */
p_ap_decode_obj->encoding = kEncodeNone;
p_ap_decode_obj->which_part = kFinishing;
}
while (1)
{
status = fetch_a_line(p_ap_decode_obj, newline);
if (status != NOERR)
return status; /* a possible end of buff happened. */
if (newline[0] == '\0')
break; /* we get the end of a defination section. */
p = newline;
while (1)
{
parse_param(p, &param, &define, &p);
/*
** we only care about these params.
*/
if (!XP_STRNCASECMP(param, "Content-Type:", 13))
{
if (!XP_STRNCASECMP(define, "application/applefile", 21))
p_ap_decode_obj->which_part = kHeaderPortion;
else
{
p_ap_decode_obj->which_part = kDataPortion;
if (!XP_STRNCASECMP(define, "text/plain", 10))
p_ap_decode_obj->is_binary = FALSE;
else
p_ap_decode_obj->is_binary = TRUE;
}
/* Broken QuickMail messages */
if (!XP_STRNCASECMP(define, "x-uuencode-apple-single", 23))
p_ap_decode_obj->encoding = kEncodeUU;
}
else if (!XP_STRNCASECMP(param, "Content-Transfer-Encoding:",26))
{
if (!XP_STRNCASECMP(define, "base64", 6))
p_ap_decode_obj->encoding = kEncodeBase64;
else if (!XP_STRNCASECMP(define, "quoted-printable", 16))
p_ap_decode_obj->encoding = kEncodeQP;
else
p_ap_decode_obj->encoding = kEncodeNone;
}
else if (!XP_STRNCASECMP(param, "Content-Disposition:", 20))
{
if (!XP_STRNCASECMP(define, "inline", 5))
p_ap_decode_obj->deposition = kInline;
else
p_ap_decode_obj->deposition = kDontCare;
}
else if (!XP_STRNCASECMP(param, "filename=", 9))
{
if (p_ap_decode_obj->fname[0] == '\0')
{
for (i = 0; *define && *define != '\"'; )
p_ap_decode_obj->fname[i++] = *define++;
p_ap_decode_obj->fname[i] = '\0';
}
}
if (*p == '\0')
break;
}
}
return errDone;
}
/*
** decode the head portion.
*/
int ap_decode_file_infor(appledouble_decode_object *p_ap_decode_obj)
{
ap_header head;
ap_entry entries[NUM_ENTRIES + 1];
int i, j;
int st_pt;
uint32 in_count;
int status;
char name[256];
XP_Bool positionedAtRFork = FALSE;
st_pt = p_ap_decode_obj->pos_inbuff;
/*
** Read & verify header
*/
status = from_decoder(
p_ap_decode_obj,
(char *) &head,
26, /* sizeof (head), */
&in_count);
if (status != NOERR)
return status;
if (p_ap_decode_obj->is_apple_single)
{
if (ntohl(head.magic) != APPLESINGLE_MAGIC)
return errVersion;
}
else
{
if(ntohl(head.magic) != APPLEDOUBLE_MAGIC)
return errVersion;
}
if (ntohl(head.version) != VERSION)
{
return errVersion;
}
/* read entries */
head.entries = ntohs(head.entries);
for (i = j = 0; i < head.entries; ++i)
{
status = from_decoder(
p_ap_decode_obj,
(char *) (entries + j),
sizeof (ap_entry),
&in_count);
if (status != NOERR)
return errDecoding;
/*
** correct the byte order now.
*/
entries[j].id = ntohl(entries[j].id);
entries[j].offset = ntohl(entries[j].offset);
entries[j].length = ntohl(entries[j].length);
/*
** only care about these entries...
*/
if (j < NUM_ENTRIES)
switch (entries[j].id)
{
case ENT_NAME:
case ENT_FINFO:
case ENT_DATES:
case ENT_COMMENT:
case ENT_RFORK:
case ENT_DFORK:
++j;
break;
}
}
in_count = XP_STRLEN(p_ap_decode_obj->fname);
/* if the user has not provided the output file name, read it
* from the ENT_NAME entry
*/
if (in_count == 0)
{
/* read name */
for (i = 0; i < j && entries[i].id != ENT_NAME; ++i)
;
if (i == j)
return errDecoding;
status = decoder_seek(
p_ap_decode_obj,
entries[i].offset,
st_pt);
if (status != NOERR)
return status;
if (entries[i].length > 63)
entries[i].length = 63;
status = from_decoder(
p_ap_decode_obj,
p_ap_decode_obj->fname,
entries[i].length,
&in_count);
if (status != NOERR)
return status;
p_ap_decode_obj->fname[in_count] = '\0';
}
/* P_String version of the file name. */
XP_STRCPY((char *)name+1, p_ap_decode_obj->fname);
name[0] = (char) in_count;
if (p_ap_decode_obj->write_as_binhex)
{
/*
** fill out the simple the binhex head.
*/
binhex_header head;
myFInfo myFInfo;
status = (*p_ap_decode_obj->binhex_stream->put_block)
(p_ap_decode_obj->binhex_stream->data_object,
name,
name[0] + 2);
if (status != NOERR)
return status;
/* get finder info */
for (i = 0; i < j && entries[i].id != ENT_FINFO; ++i)
;
if (i < j)
{
status = decoder_seek(p_ap_decode_obj,
entries[i].offset,
st_pt);
if (status != NOERR)
return status;
status = from_decoder(p_ap_decode_obj,
(char *) &myFInfo,
sizeof (myFInfo),
&in_count);
if (status != NOERR)
return status;
}
head.type = myFInfo.fdType;
head.creator = myFInfo.fdCreator;
head.flags = myFInfo.fdFlags;
for (i = 0; i < j && entries[i].id != ENT_DFORK; ++i)
;
if (i < j && entries[i].length != 0)
{
head.dlen = entries[i].length; /* set the data fork length */
}
else
{
head.dlen = 0;
}
for (i = 0; i < j && entries[i].id != ENT_RFORK; ++i)
;
if (i < j && entries[i].length != 0)
{
head.rlen = entries[i].length; /* set the resource fork length */
}
else
{
head.rlen = 0;
}
/*
** and the dlen, rlen is in the host byte order, correct it if needed ...
*/
head.dlen = htonl(head.dlen);
head.rlen = htonl(head.rlen);
/*
** then encode them in binhex.
*/
status = (*p_ap_decode_obj->binhex_stream->put_block)
(p_ap_decode_obj->binhex_stream->data_object,
(char*)&head,
sizeof(binhex_header));
if (status != NOERR)
return status;
/*
** after we have done with the header, end the binhex header part.
*/
status = (*p_ap_decode_obj->binhex_stream->put_block)
(p_ap_decode_obj->binhex_stream->data_object,
NULL,
0);
}
else
{
#ifdef XP_MAC
ap_dates dates;
HFileInfo *fpb;
CInfoPBRec cipbr;
IOParam vinfo;
GetVolParmsInfoBuffer vp;
DTPBRec dtp;
char comment[256];
unsigned char filename[256]; /* this is a pascal string - should be unsigned char. */
StandardFileReply reply;
/* convert char* p_ap_decode_obj->fname to a pascal string */
XP_STRCPY((char*)filename + 1, p_ap_decode_obj->fname);
filename[0] = XP_STRLEN(p_ap_decode_obj->fname);
if( !p_ap_decode_obj->mSpec )
{
StandardPutFile("\pSave decoded file as:",
(const unsigned char*)filename,
&reply);
if (!reply.sfGood)
{
return errUsrCancel;
}
}
else
{
reply.sfFile.vRefNum = p_ap_decode_obj->mSpec->vRefNum;
reply.sfFile.parID = p_ap_decode_obj->mSpec->parID;
XP_MEMCPY(&reply.sfFile.name, p_ap_decode_obj->mSpec->name , 63 );
}
XP_MEMCPY(p_ap_decode_obj->fname,
reply.sfFile.name+1,
*(reply.sfFile.name)+1);
p_ap_decode_obj->fname[*(reply.sfFile.name)] = '\0';
p_ap_decode_obj->vRefNum = reply.sfFile.vRefNum;
p_ap_decode_obj->dirId = reply.sfFile.parID;
/* create & get info for file */
HDelete(reply.sfFile.vRefNum,
reply.sfFile.parID,
reply.sfFile.name);
#define DONT_CARE_TYPE 0x3f3f3f3f
if (HCreate(reply.sfFile.vRefNum,
reply.sfFile.parID,
reply.sfFile.name,
DONT_CARE_TYPE,
DONT_CARE_TYPE) != NOERR)
{
return errFileOpen;
}
fpb = (HFileInfo *) &cipbr;
fpb->ioVRefNum = reply.sfFile.vRefNum;
fpb->ioDirID = reply.sfFile.parID;
fpb->ioNamePtr = reply.sfFile.name;
fpb->ioFDirIndex = 0;
PBGetCatInfoSync(&cipbr);
/* get finder info */
for (i = 0; i < j && entries[i].id != ENT_FINFO; ++i)
;
if (i < j)
{
status = decoder_seek(p_ap_decode_obj,
entries[i].offset,
st_pt);
if (status != NOERR)
return status;
status = from_decoder(p_ap_decode_obj,
(char *) &fpb->ioFlFndrInfo,
sizeof (FInfo),
&in_count);
if (status != NOERR)
return status;
status = from_decoder(p_ap_decode_obj,
(char *) &fpb->ioFlXFndrInfo,
sizeof (FXInfo),
&in_count);
if (status != NOERR && status != errEOP )
return status;
fpb->ioFlFndrInfo.fdFlags &= 0xfc00; /* clear flags maintained by finder */
}
/*
** get file date info
*/
for (i = 0; i < j && entries[i].id != ENT_DATES; ++i)
;
if (i < j)
{
status = decoder_seek(p_ap_decode_obj,
entries[i].offset,
st_pt);
if (status != NOERR && status != errEOP )
return status;
status = from_decoder(p_ap_decode_obj,
(char *) &dates,
sizeof (dates),
&in_count);
if (status != NOERR)
return status;
fpb->ioFlCrDat = dates.create - CONVERT_TIME;
fpb->ioFlMdDat = dates.modify - CONVERT_TIME;
fpb->ioFlBkDat = dates.backup - CONVERT_TIME;
}
/*
** update info
*/
fpb->ioDirID = fpb->ioFlParID;
PBSetCatInfoSync(&cipbr);
/*
** get comment & save it
*/
for (i = 0; i < j && entries[i].id != ENT_COMMENT; ++i)
;
if (i < j && entries[i].length != 0)
{
memset((void *) &vinfo, '\0', sizeof (vinfo));
vinfo.ioVRefNum = fpb->ioVRefNum;
vinfo.ioBuffer = (Ptr) &vp;
vinfo.ioReqCount = sizeof (vp);
if (PBHGetVolParmsSync((HParmBlkPtr) &vinfo) == NOERR &&
((vp.vMAttrib >> bHasDesktopMgr) & 1))
{
memset((void *) &dtp, '\0', sizeof (dtp));
dtp.ioVRefNum = fpb->ioVRefNum;
if (PBDTGetPath(&dtp) == NOERR)
{
if (entries[i].length > 255)
entries[i].length = 255;
status = decoder_seek(p_ap_decode_obj,
entries[i].offset,
st_pt);
if (status != NOERR)
return status;
status = from_decoder(p_ap_decode_obj,
comment,
entries[i].length,
&in_count);
if (status != NOERR)
return status;
dtp.ioDTBuffer = (Ptr) comment;
dtp.ioNamePtr = fpb->ioNamePtr;
dtp.ioDirID = fpb->ioDirID;
dtp.ioDTReqCount = entries[i].length;
if (PBDTSetCommentSync(&dtp) == NOERR)
{
PBDTFlushSync(&dtp);
}
}
}
}
#else
/*
** in non-mac system, creating a data fork file will be it.
*/
#endif
}
/*
** Get the size of the resource fork, and (maybe) position to the beginning of it.
*/
for (i = 0; i < j && entries[i].id != ENT_RFORK; ++i)
;
if (i < j && entries[i].length != 0)
{
#ifdef XP_MAC
/* Seek to the start of the resource fork only if we're on a Mac */
status = decoder_seek(p_ap_decode_obj,
entries[i].offset,
st_pt);
positionedAtRFork = TRUE;
#endif
p_ap_decode_obj->rksize = entries[i].length;
}
else
p_ap_decode_obj->rksize = 0;
/*
** Get the size of the data fork, and (maybe) position to the beginning of it.
*/
for (i = 0; i < j && entries[i].id != ENT_DFORK; ++i)
;
if (i < j && entries[i].length != 0)
{
if (p_ap_decode_obj->is_apple_single && !positionedAtRFork)
status = decoder_seek(p_ap_decode_obj,
entries[i].offset,
st_pt);
p_ap_decode_obj->dksize = entries[i].length;
}
else
p_ap_decode_obj->dksize = 0;
/*
** Prepare a tempfile to hold the resource fork decoded by the decoder,
** because in binhex, resource fork appears after the data fork!!!
*/
if (p_ap_decode_obj->write_as_binhex)
{
if (p_ap_decode_obj->rksize != 0)
{
/* we need a temp file to hold all the resource data, because the */
p_ap_decode_obj->tmpfname
= WH_TempName(xpTemporary, "apmail");
p_ap_decode_obj->tmpfd
= XP_FileOpen(p_ap_decode_obj->tmpfname,
xpTemporary,
XP_FILE_TRUNCATE_BIN);
if (p_ap_decode_obj->tmpfd == NULL)
return errFileOpen;
}
}
return NOERR;
}
/*
** ap_decode_process_header
**
**
*/
int ap_decode_process_header(
appledouble_decode_object* p_ap_decode_obj,
XP_Bool firstime)
{
uint32 in_count;
int status = NOERR;
char wr_buff[1024];
if (firstime)
{
status = ap_decode_file_infor(p_ap_decode_obj);
if (status != NOERR)
return status;
if (p_ap_decode_obj->rksize > 0)
{
#ifdef XP_MAC
if(!p_ap_decode_obj->write_as_binhex)
{
Str63 fname;
short refNum;
fname[0] = XP_STRLEN(p_ap_decode_obj->fname);
XP_STRCPY((char*)fname+1, p_ap_decode_obj->fname);
if (HOpenRF(p_ap_decode_obj->vRefNum,
p_ap_decode_obj->dirId,
fname,
fsWrPerm,
&refNum) != NOERR)
{
return (errFileOpen);
}
p_ap_decode_obj->fileId = refNum;
}
#endif
}
else
{
status = errDone;
}
}
/*
** Time to continue decoding all the resource data.
*/
while (status == NOERR && p_ap_decode_obj->rksize > 0)
{
in_count = MIN(1024, p_ap_decode_obj->rksize);
status = from_decoder(p_ap_decode_obj,
wr_buff,
in_count,
&in_count);
if (p_ap_decode_obj->write_as_binhex)
{
/*
** Write to the temp file first, because the resource fork appears after
** the data fork in the binhex encoding.
*/
if (XP_FileWrite(wr_buff,
in_count,
p_ap_decode_obj->tmpfd) != in_count)
{
status = errFileWrite;
break;
}
p_ap_decode_obj->data_size += in_count;
}
else
{
#ifdef XP_MAC
long howMuch = in_count;
if (FSWrite(p_ap_decode_obj->fileId,
&howMuch,
wr_buff) != NOERR)
{
status = errFileWrite;
break;
}
#else
/* ====== Write nothing in a non mac file system ============ */
#endif
}
p_ap_decode_obj->rksize -= in_count;
}
if (p_ap_decode_obj->rksize <= 0 || status == errEOP)
{
if (p_ap_decode_obj->write_as_binhex)
{
/*
** No more resource data, but we are not done
** with tempfile yet, just seek back to the start point,
** -- ready for a readback later
*/
if (p_ap_decode_obj->tmpfd)
XP_FileSeek(p_ap_decode_obj->tmpfd, 0L, 1);
}
#ifdef XP_MAC
else if (p_ap_decode_obj->fileId) /* close the resource fork of the macfile */
{
FSClose(p_ap_decode_obj->fileId);
p_ap_decode_obj->fileId = 0;
}
#endif
if (!p_ap_decode_obj->is_apple_single)
{
p_ap_decode_obj->left = 0;
p_ap_decode_obj->state64 = 0;
}
status = errDone;
}
return status;
}
int ap_decode_process_data(
appledouble_decode_object* p_ap_decode_obj,
XP_Bool firstime)
{
char wr_buff[1024];
uint32 in_count;
int status = NOERR;
int retval = NOERR;
if (firstime)
{
if (!p_ap_decode_obj->write_as_binhex)
{
#ifdef XP_MAC
char *filename;
FSSpec fspec;
fspec.vRefNum = p_ap_decode_obj->vRefNum;
fspec.parID = p_ap_decode_obj->dirId;
fspec.name[0] = XP_STRLEN(p_ap_decode_obj->fname);
XP_STRCPY((char*)fspec.name+1, p_ap_decode_obj->fname);
filename = my_PathnameFromFSSpec(&fspec);
if (p_ap_decode_obj->is_binary)
p_ap_decode_obj->fd =
XP_FileOpen(filename+7, xpURL, XP_FILE_TRUNCATE_BIN);
else
p_ap_decode_obj->fd =
XP_FileOpen(filename+7, xpURL, XP_FILE_TRUNCATE);
XP_FREE(filename);
#else
if (p_ap_decode_obj->is_binary)
p_ap_decode_obj->fd =
XP_FileOpen(p_ap_decode_obj->fname, xpURL, XP_FILE_TRUNCATE_BIN);
else
p_ap_decode_obj->fd =
XP_FileOpen(p_ap_decode_obj->fname, xpURL, XP_FILE_TRUNCATE);
#endif
}
else
{
; /* == don't need do anything to binhex stream, it is ready already == */
}
}
if (p_ap_decode_obj->is_apple_single &&
p_ap_decode_obj->dksize == 0)
{
/* if no data in apple single, we already done then. */
status = errDone;
}
while (status == NOERR && retval == NOERR)
{
retval = from_decoder(p_ap_decode_obj,
wr_buff,
1024,
&in_count);
if (p_ap_decode_obj->is_apple_single) /* we know the data fork size in */
p_ap_decode_obj->dksize -= in_count; /* apple single, use it to decide the end */
if (p_ap_decode_obj->write_as_binhex)
status = (*p_ap_decode_obj->binhex_stream->put_block)
(p_ap_decode_obj->binhex_stream->data_object,
wr_buff,
in_count);
else
status = XP_FileWrite(wr_buff,
in_count,
p_ap_decode_obj->fd) == in_count ? NOERR : errFileWrite;
if (retval == errEOP || /* for apple double, we meet the boundary */
( p_ap_decode_obj->is_apple_single &&
p_ap_decode_obj->dksize <= 0)) /* for apple single, we know it is ending */
{
status = errDone;
break;
}
}
if (status == errDone)
{
if (p_ap_decode_obj->write_as_binhex)
{
/* CALL with data == NULL && size == 0 to end a part object in binhex encoding */
status = (*p_ap_decode_obj->binhex_stream->put_block)
(p_ap_decode_obj->binhex_stream->data_object,
NULL,
0);
if (status != NOERR)
return status;
}
else if (p_ap_decode_obj->fd)
{
XP_FileClose(p_ap_decode_obj->fd);
p_ap_decode_obj->fd = 0;
}
status = errDone;
}
return status;
}
/*
** Fill the data from the decoder stream.
*/
PRIVATE int from_decoder(
appledouble_decode_object* p_ap_decode_obj,
char *buff,
int buff_size,
uint32 *in_count)
{
int status;
switch (p_ap_decode_obj->encoding)
{
case kEncodeQP:
status = from_qp(p_ap_decode_obj,
buff,
buff_size,
in_count);
break;
case kEncodeBase64:
status = from_64(p_ap_decode_obj,
buff,
buff_size,
in_count);
break;
case kEncodeUU:
status = from_uu(p_ap_decode_obj,
buff,
buff_size,
in_count);
break;
case kEncodeNone:
default:
status = from_none(p_ap_decode_obj,
buff,
buff_size,
in_count);
break;
}
return status;
}
/*
** decoder_seek
**
** simulate a stream seeking on the encoded stream.
*/
PRIVATE int decoder_seek(
appledouble_decode_object* p_ap_decode_obj,
int seek_pos,
int start_pos)
{
char tmp[1024];
int status = NOERR;
uint32 in_count;
/*
** force a reset on the in buffer.
*/
p_ap_decode_obj->state64 = 0;
p_ap_decode_obj->left = 0;
p_ap_decode_obj->pos_inbuff = start_pos;
p_ap_decode_obj->uu_starts_line = TRUE;
p_ap_decode_obj->uu_bytes_written = p_ap_decode_obj->uu_line_bytes = 0;
p_ap_decode_obj->uu_state = kWaitingForBegin;
while (seek_pos > 0)
{
status = from_decoder(p_ap_decode_obj,
tmp,
MIN(1024, seek_pos),
&in_count);
if (status != NOERR)
break;
seek_pos -= in_count;
}
return status;
}
#define XX 127
/*
* Table for decoding base64
*/
static char index_64[256] = {
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,62, XX,XX,XX,63,
52,53,54,55, 56,57,58,59, 60,61,XX,XX, XX,XX,XX,XX,
XX, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10, 11,12,13,14,
15,16,17,18, 19,20,21,22, 23,24,25,XX, XX,XX,XX,XX,
XX,26,27,28, 29,30,31,32, 33,34,35,36, 37,38,39,40,
41,42,43,44, 45,46,47,48, 49,50,51,XX, XX,XX,XX,XX,
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
};
#ifdef XP_OS2_HACK
/*DSR102196 - the OS/2 Visual Age compiler croaks when it tries*/
/*to optomize this macro (/O+ on CSD4) */
char CHAR64(int c)
{
unsigned char index;
char rc;
index = (unsigned char) c;
rc = index_64[index];
return rc;
}
#else /*normal code...*/
#define CHAR64(c) (index_64[(unsigned char)(c)])
#endif
#define EndOfBuff(p) ((p)->pos_inbuff >= (p)->s_inbuff)
PRIVATE int fetch_next_char_64(
appledouble_decode_object* p_ap_decode_obj)
{
char c;
c = p_ap_decode_obj->inbuff[p_ap_decode_obj->pos_inbuff++];
if (c == '-')
--p_ap_decode_obj->pos_inbuff; /* put back */
while (c == LF || c == CR) /* skip the CR character. */
{
if (EndOfBuff(p_ap_decode_obj))
{
c = 0;
break;
}
c = p_ap_decode_obj->inbuff[p_ap_decode_obj->pos_inbuff++];
if (c == '-')
{
--p_ap_decode_obj->pos_inbuff; /* put back */
}
}
return (int)c;
}
PRIVATE int from_64(
appledouble_decode_object* p_ap_decode_obj,
char *buff,
int size,
uint32 *real_size)
{
int i, j, buf[4];
int c1, c2, c3, c4;
(*real_size) = 0;
/*
** decode 4 by 4s characters
*/
for (i = p_ap_decode_obj->state64; i<4; i++)
{
if (EndOfBuff(p_ap_decode_obj))
{
p_ap_decode_obj->state64 = i;
break;
}
if ((p_ap_decode_obj->c[i] = fetch_next_char_64(p_ap_decode_obj)) == 0)
break;
}
if (i != 4)
{
/*
** not enough data to fill the decode buff.
*/
return errEOB; /* end of buff */
}
while (size > 0)
{
c1 = p_ap_decode_obj->c[0];
c2 = p_ap_decode_obj->c[1];
c3 = p_ap_decode_obj->c[2];
c4 = p_ap_decode_obj->c[3];
if (c1 == '-' || c2 == '-' || c3 == '-' || c4 == '-')
{
return errEOP; /* we meet the part boundary. */
}
if (c1 == '=' || c2 == '=')
{
return errDecoding;
}
c1 = CHAR64(c1);
c2 = CHAR64(c2);
buf[0] = ((c1<<2) | ((c2&0x30)>>4));
if (c3 != '=')
{
c3 = CHAR64(c3);
buf[1] = (((c2&0x0F) << 4) | ((c3&0x3C) >> 2));
if (c4 != '=')
{
c4 = CHAR64(c4);
buf[2] = (((c3&0x03) << 6) | c4);
}
else
{
if (p_ap_decode_obj->left == 0)
{
*buff++ = buf[0]; (*real_size)++;
}
*buff++ = buf[1]; (*real_size)++;
/* return errEOP; */ /* bug 87784 */
return EndOfBuff(p_ap_decode_obj) ? errEOP : NOERR;
}
}
else
{
*buff++ = *buf;
(*real_size)++;
/* return errEOP; *bug 87784*/ /* we meet the the end */
return EndOfBuff(p_ap_decode_obj) ? errEOP : NOERR;
}
/*
** copy the content
*/
for (j = p_ap_decode_obj->left; j<3; )
{
*buff++ = buf[j++];
(*real_size)++;
if (--size <= 0)
break;
}
p_ap_decode_obj->left = j % 3;
if (size <=0)
{
if (j == 3)
p_ap_decode_obj->state64 = 0; /* See if we used up all data, */
/* ifnot, keep the data, */
/* we need it for next time. */
else
p_ap_decode_obj->state64 = 4;
break;
}
/*
** fetch the next 4 character group.
*/
for (i = 0; i < 4; i++)
{
if (EndOfBuff(p_ap_decode_obj))
break;
if ((p_ap_decode_obj->c[i] = fetch_next_char_64(p_ap_decode_obj)) == 0)
break;
}
p_ap_decode_obj->state64 = i % 4;
if (i != 4)
break; /* some kind of end of buff met.*/
}
/*
** decide the size and status.
*/
return EndOfBuff(p_ap_decode_obj) ? errEOB : NOERR;
}
/*
* Table for decoding hexadecimal in quoted-printable
*/
static char index_hex[256] = {
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
0, 1, 2, 3, 4, 5, 6, 7, 8, 9,XX,XX, XX,XX,XX,XX,
XX,10,11,12, 13,14,15,XX, XX,XX,XX,XX, XX,XX,XX,XX,
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
XX,10,11,12, 13,14,15,XX, XX,XX,XX,XX, XX,XX,XX,XX,
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
};
#define HEXCHAR(c) (index_hex[(unsigned char)(c)])
#define NEXT_CHAR(p) ((int)((p)->inbuff[(p)->pos_inbuff++]))
#define CURRENT_CHAR(p) ((int)((p)->inbuff[(p)->pos_inbuff]))
/*
** quoted printable decode, as defined in RFC 1521, page18 - 20
*/
PRIVATE int from_qp(
appledouble_decode_object* p_ap_decode_obj,
char *buff,
int size,
uint32 *real_size)
{
char c;
int c1, c2;
*real_size = 0;
if (p_ap_decode_obj->c[0] == '=')
{
/*
** continue with the last time's left over.
*/
p_ap_decode_obj->c[0] = 0;
c1 = p_ap_decode_obj->c[1]; p_ap_decode_obj->c[1] = 0;
if ( c1 == 0)
{
c1 = NEXT_CHAR(p_ap_decode_obj);
c2 = NEXT_CHAR(p_ap_decode_obj);
}
else
{
c2 = NEXT_CHAR(p_ap_decode_obj);
}
c = HEXCHAR(c1) << 4 | HEXCHAR(c2);
size --;
*buff ++ = c;
(*real_size) ++;
}
/*
** Then start to work on the new data
*/
while (size > 0)
{
if (EndOfBuff(p_ap_decode_obj))
break;
c1 = NEXT_CHAR(p_ap_decode_obj);
if (c1 == '=')
{
if (EndOfBuff(p_ap_decode_obj))
{
p_ap_decode_obj->c[0] = c1;
break;
}
c1 = NEXT_CHAR(p_ap_decode_obj);
if (c1 != '\n')
{
/*
** Rule #2
*/
c1 = HEXCHAR(c1);
if (EndOfBuff(p_ap_decode_obj))
{
p_ap_decode_obj->c[0] = '=';
p_ap_decode_obj->c[1] = c1;
break;
}
c2 = NEXT_CHAR(p_ap_decode_obj);
c2 = HEXCHAR(c2);
c = c1 << 4 | c2;
if (c != '\r')
{
size --;
*buff++ = c;
(*real_size)++;
}
}
else
{
/* ignore the line break -- soft line break, rule #5 */
}
}
else
{
if (c1 == CR || c1 == LF)
{
if (p_ap_decode_obj->pos_inbuff < p_ap_decode_obj->s_inbuff)
{
if (p_ap_decode_obj->boundary0 &&
(!XP_STRNCASECMP(p_ap_decode_obj->pos_inbuff+p_ap_decode_obj->inbuff,
"--",
2)
&&
!XP_STRNCASECMP(p_ap_decode_obj->pos_inbuff+p_ap_decode_obj->inbuff+2,
p_ap_decode_obj->boundary0,
XP_STRLEN(p_ap_decode_obj->boundary0))))
{
return errEOP;
}
}
}
/*
** general 8bits case, Rule #1
*/
size -- ;
*buff++ = c1;
(*real_size) ++;
}
}
return EndOfBuff(p_ap_decode_obj) ? errEOB : NOERR;
}
#define UUEOL(c) (((c) == CR) || ((c) == LF))
# undef UUDEC
# define UUDEC(c) (((c) - ' ') & 077)
/* Check for and skip past the "begin" line of a uuencode body. */
PRIVATE void ensure_uu_body_state(appledouble_decode_object* p)
{
char *end = &(p->inbuff[p->s_inbuff]);
char *current = &(p->inbuff[p->pos_inbuff]);
if (p->uu_state == kMainBody && p->uu_starts_line
&& !XP_STRNCASECMP(current, "end", MIN(3, end - current)))
p->uu_state = kEnd;
while (p->uu_state != kMainBody && (current < end))
{
switch(p->uu_state)
{
case kWaitingForBegin:
case kBegin:
/* If we're not at the beginning of a line, move to the next line. */
if (! p->uu_starts_line)
{
while(current < end && !UUEOL(*current))
current++;
while(current < end && UUEOL(*current))
current++;
p->uu_starts_line = TRUE; /* we reached the start of a line */
if (p->uu_state == kBegin)
p->uu_state = kMainBody;
continue;
}
else
{
/*
At the start of a line. Test for "begin".
### mwelch:
There is a potential danger here. If a buffer ends with a line
starting with some substring of "begin", this code will be fooled
into thinking that the uuencode body starts with the following line.
If the message itself contains lines that begin with a substring of
"begin", such as "be", "because", or "bezoar", and if those lines happen
to end a 1024-byte chunk, this becomes Really Bad. However, there is
no good, safe way to overcome this problem. So, for now, I hope and
pray that the 1024 character limit will always incorporate the entire
first line of a uuencode body.
It should be noted that broken messages that have the body text in
the same MIME part as the uuencode attachment also risk this same
pitfall if any line in the message starts with "begin".
*/
if ((p->uu_state == kWaitingForBegin)
&& !XP_STRNCASECMP(current, "begin", MIN(5, end - current)))
p->uu_state = kBegin;
p->uu_starts_line = FALSE; /* make us advance to next line */
}
break;
case kEnd:
/* Run out the buffer. */
current = end;
}
}
/* Record where we stopped scanning. */
p->pos_inbuff = p->s_inbuff - (end - current);
}
#define UU_VOID_CHAR 0
PRIVATE int fetch_next_char_uu(appledouble_decode_object* p, XP_Bool newBunch)
{
char c=0;
XP_Bool gotChar = FALSE;
if (EndOfBuff(p))
return 0;
while(!gotChar)
{
if (EndOfBuff(p))
{
c = 0;
gotChar = TRUE;
}
else if (p->uu_starts_line)
{
char *end = &(p->inbuff[p->s_inbuff]);
char *current = &(p->inbuff[p->pos_inbuff]);
/* Look here for 'end' line signifying end of uuencode body. */
if (!XP_STRNCASECMP(current, "end", MIN(3, end - current)))
{
p->uu_state = kEnd; /* set the uuencode state to end */
p->pos_inbuff = p->s_inbuff; /* run out the current buffer */
c = 0; /* return a 0 to uudecoder */
gotChar = TRUE;
}
}
if (gotChar)
continue;
c = NEXT_CHAR(p);
if ((c == CR) || (c == LF))
{
if (newBunch)
{
/* A new line could immediately follow either a CR or an LF.
If we reach the end of a buffer, simply assume the next buffer
will start a line (as it should in the current libmime implementation).
If it starts with CR or LF, that line will be skipped as well. */
if (EndOfBuff(p) || ((CURRENT_CHAR(p) != CR) && (CURRENT_CHAR(p) != LF)))
p->uu_starts_line = TRUE;
continue;
}
/* End of line, but we have to finish a 4-tuple. Stop here. */
-- p->pos_inbuff; /* give back the end-of-line character */
c = UU_VOID_CHAR; /* flag as truncated */
gotChar = TRUE;
}
/* At this point, we have a valid char. */
else if (p->uu_starts_line)
{
/* read length char at start of each line */
p->uu_line_bytes = UUDEC(c);
p->uu_starts_line = FALSE;
continue;
}
else if (p->uu_line_bytes <= 0)
/* We ran out of bytes to decode on this line. Skip spare chars until
we reach the end of (line or buffer). */
continue;
else
gotChar = TRUE; /* valid returnable char */
}
return (int) c;
}
/*
** uudecode
*/
PRIVATE int from_uu(
appledouble_decode_object* p_ap_decode_obj,
char *buff,
int size,
uint32 *real_size)
{
char c;
int i;
int returnVal = NOERR;
int c1, c2, c3, c4;
*real_size = 0;
/* Make sure that we're in the uuencode body, or run out the buffer if
we don't have any body text in this buffer. */
ensure_uu_body_state(p_ap_decode_obj);
if (p_ap_decode_obj->uu_state == kEnd)
return errEOP;
/* Continue with what was left over last time. */
for (i = p_ap_decode_obj->state64; i<4; i++)
{
if (EndOfBuff(p_ap_decode_obj))
{
p_ap_decode_obj->state64 = i;
break;
}
if ((p_ap_decode_obj->c[i] = fetch_next_char_uu(p_ap_decode_obj, (i==0))) == 0)
break;
}
if ( (i < p_ap_decode_obj->uu_line_bytes+1)
&& (EndOfBuff(p_ap_decode_obj)))
/* not enough data to decode, return here. */
return errEOB;
while((size > 0) && (!EndOfBuff(p_ap_decode_obj)))
{
c1 = p_ap_decode_obj->c[0];
c2 = p_ap_decode_obj->c[1];
c3 = p_ap_decode_obj->c[2];
c4 = p_ap_decode_obj->c[3];
/*
At this point we have characters ready to decode.
Convert them to binary bytes.
*/
if ((i > 1)
&& (p_ap_decode_obj->uu_bytes_written < 1)
&& (p_ap_decode_obj->uu_line_bytes > 0))
{
c = UUDEC(c1) << 2 | UUDEC(c2) >> 4;
size --;
*buff ++ = c;
(*real_size) ++;
p_ap_decode_obj->uu_line_bytes--;
p_ap_decode_obj->uu_bytes_written++;
}
if ((i > 2) && (size > 0)
&& (p_ap_decode_obj->uu_bytes_written < 2)
&& (p_ap_decode_obj->uu_line_bytes > 0))
{
c = UUDEC(c2) << 4 | UUDEC(c3) >> 2;
size --;
*buff ++ = c;
(*real_size) ++;
p_ap_decode_obj->uu_line_bytes--;
p_ap_decode_obj->uu_bytes_written++;
}
if ((i > 3) && (size > 0)
&& (p_ap_decode_obj->uu_line_bytes > 0))
{
c = UUDEC(c3) << 6 | UUDEC(c4);
size --;
*buff ++ = c;
(*real_size) ++;
p_ap_decode_obj->uu_line_bytes--;
p_ap_decode_obj->uu_bytes_written = 0;
}
if (p_ap_decode_obj->uu_state == kEnd)
continue;
/* If this line is finished, this tuple is also finished. */
if (p_ap_decode_obj->uu_line_bytes <= 0)
p_ap_decode_obj->uu_bytes_written = 0;
if (p_ap_decode_obj->uu_bytes_written > 0)
{
/* size == 0, but we have bytes left in current tuple */
p_ap_decode_obj->state64 = i;
continue;
}
/*
** fetch the next 4 character group.
*/
for (i = 0; i < 4; i++)
{
if (EndOfBuff(p_ap_decode_obj))
break;
if ((p_ap_decode_obj->c[i] = fetch_next_char_uu(p_ap_decode_obj, (i == 0))) == 0)
break;
}
p_ap_decode_obj->state64 = i;
if ( (i < p_ap_decode_obj->uu_line_bytes+1)
&& (EndOfBuff(p_ap_decode_obj)))
/* not enough data to decode, return here. */
continue;
}
if (p_ap_decode_obj->uu_state == kEnd)
returnVal = errEOP;
else if (EndOfBuff(p_ap_decode_obj))
returnVal = errEOB;
return returnVal;
}
/*
** from_none
**
** plain text transfer.
*/
PRIVATE int from_none(
appledouble_decode_object* p_ap_decode_obj,
char *buff,
int size,
uint32 *real_size)
{
char c;
int i, status = NOERR;
int left = p_ap_decode_obj->s_inbuff - p_ap_decode_obj->pos_inbuff;
int total = MIN(size, left);
for (i = 0; i < total; i++)
{
*buff ++ = c = NEXT_CHAR(p_ap_decode_obj);
if (c == CR || c == LF)
{
/* make sure the next thing is not a boundary string */
if (p_ap_decode_obj->pos_inbuff < p_ap_decode_obj->s_inbuff)
{
if (p_ap_decode_obj->boundary0 &&
(!XP_STRNCASECMP(p_ap_decode_obj->pos_inbuff+p_ap_decode_obj->inbuff,
"--",
2)
&&
!XP_STRNCASECMP(p_ap_decode_obj->pos_inbuff+p_ap_decode_obj->inbuff+2,
p_ap_decode_obj->boundary0,
XP_STRLEN(p_ap_decode_obj->boundary0))))
{
status = errEOP;
break;
}
}
}
}
*real_size = i;
if (status == NOERR)
status = (left == i) ? errEOB : status;
return status;
}
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