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#include <fitz.h>
#include <mupdf.h>
void usage()
{
fprintf(stderr,
"usage: pdfclean [options] infile.pdf outfile.pdf\n"
" -r\treconstruct broken xref table\n"
" -g\tgarbage collect unused objects\n"
" -x\texpand compressed streams\n"
" -d -\tset user password for decryption\n"
" -e\tencrypt outfile\n"
" -u -\tset user password for encryption\n"
" -o -\tset owner password\n"
" -p -\tset permissions\n"
" -n -\tkey length in bits: 40 <= n <= 128\n"
);
exit(1);
}
void preloadobjstms(pdf_xref *xref)
{
fz_error *error;
fz_obj *obj;
int i;
for (i = 0; i < xref->len; i++)
{
if (xref->table[i].type == 'o')
{
error = pdf_loadobject(&obj, xref, i, 0);
if (error) fz_abort(error);
fz_dropobj(obj);
}
}
}
void expandstreams(pdf_xref *xref)
{
fz_error *error;
fz_obj *stmobj;
fz_buffer *buf;
fz_obj *stmlen;
int i, gen;
for (i = 0; i < xref->len; i++)
{
if (xref->table[i].type == 'n')
{
gen = xref->table[i].gen;
if (pdf_isstream(xref, i, gen))
{
error = pdf_loadobject(&stmobj, xref, i, gen);
if (error) fz_abort(error);
error = pdf_loadstream(&buf, xref, i, gen);
if (error) fz_abort(error);
fz_dictdels(stmobj, "Filter");
fz_dictdels(stmobj, "DecodeParms");
error = fz_newint(&stmlen, buf->wp - buf->rp);
if (error) fz_abort(error);
error = fz_dictputs(stmobj, "Length", stmlen);
if (error) fz_abort(error);
fz_dropobj(stmlen);
pdf_updateobject(xref, i, gen, stmobj);
pdf_updatestream(xref, i, gen, buf);
fz_dropobj(stmobj);
}
}
}
}
int main(int argc, char **argv)
{
fz_error *error;
char *infile;
char *outfile;
pdf_xref *xref;
int c;
pdf_crypt *encrypt = 0;
int doencrypt = 0;
int dorepair = 0;
int doexpand = 0;
int dogc = 0;
char *userpw = "";
char *ownerpw = "";
int perms = -4; /* 0xfffffffc */
int keylen = 40;
char *password = "";
while ((c = getopt(argc, argv, "rgxd:eu:o:p:n:")) != -1)
{
switch (c)
{
case 'r': ++ dorepair; break;
case 'x': ++ doexpand; break;
case 'g': ++ dogc; break;
case 'e': ++ doencrypt; break;
case 'u': userpw = optarg; break;
case 'o': ownerpw = optarg; break;
case 'p': perms = atoi(optarg); break;
case 'n': keylen = atoi(optarg); break;
case 'd': password = optarg; break;
default: usage();
}
}
if (argc - optind < 2)
usage();
infile = argv[optind++];
outfile = argv[optind++];
if (dorepair)
error = pdf_repairpdf(&xref, infile);
else
error = pdf_openpdf(&xref, infile);
if (error)
fz_abort(error);
error = pdf_decryptpdf(xref);
if (error)
fz_abort(error);
if (xref->crypt)
{
error = pdf_setpassword(xref->crypt, password);
if (error) fz_abort(error);
}
if (doencrypt)
{
fz_obj *id = fz_dictgets(xref->trailer, "ID");
if (!id)
fz_packobj(&id, "[(ABCDEFGHIJKLMNOP)(ABCDEFGHIJKLMNOP)]");
else
fz_keepobj(id);
error = pdf_newencrypt(&encrypt, userpw, ownerpw, perms, keylen, id);
if (error)
fz_abort(error);
fz_dropobj(id);
}
if (doexpand)
expandstreams(xref);
if (dogc)
{
preloadobjstms(xref);
pdf_garbagecollect(xref);
}
error = pdf_savepdf(xref, outfile, encrypt);
// error = pdf_saveincrementalpdf(xref, infile);
if (error)
fz_abort(error);
if (encrypt)
pdf_dropcrypt(encrypt);
pdf_closepdf(xref);
return 0;
}
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