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/*
* PDF signature tool: verify and sign digital signatures in PDF files.
*/
#include "mupdf/fitz.h"
#include "mupdf/pdf.h"
#include "mupdf/helpers/pkcs7-check.h"
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
static char *filename = NULL;
static void usage(void)
{
fprintf(stderr,
"usage: mutool sign input.pdf\n"
"\t-p -\tpassword\n"
);
exit(1);
}
void verify_signature(fz_context *ctx, pdf_document *doc, int n, pdf_widget *widget)
{
char msg[256];
printf("verifying signature on page %d\n", n+1);
pdf_check_signature(ctx, doc, widget, msg, sizeof msg);
printf(" result: '%s'\n", msg);
}
void verify_page(fz_context *ctx, pdf_document *doc, int n, pdf_page *page)
{
pdf_annot *annot;
for (annot = pdf_first_annot(ctx, page); annot; annot = pdf_next_annot(ctx, annot))
if (pdf_annot_type(ctx, annot) == PDF_ANNOT_WIDGET)
if (pdf_widget_type(ctx, annot) == PDF_WIDGET_TYPE_SIGNATURE)
verify_signature(ctx, doc, n, annot);
}
int pdfsign_main(int argc, char **argv)
{
fz_context *ctx;
pdf_document *doc;
char *password = "";
int i, n, c;
pdf_page *page = NULL;
while ((c = fz_getopt(argc, argv, "p:")) != -1)
{
switch (c)
{
case 'p': password = fz_optarg; break;
default: usage(); break;
}
}
if (argc - fz_optind < 1)
usage();
filename = argv[fz_optind++];
ctx = fz_new_context(NULL, NULL, FZ_STORE_UNLIMITED);
if (!ctx)
{
fprintf(stderr, "cannot initialize context\n");
exit(1);
}
fz_var(page);
doc = pdf_open_document(ctx, filename);
fz_try(ctx)
{
if (pdf_needs_password(ctx, doc))
if (!pdf_authenticate_password(ctx, doc, password))
fz_warn(ctx, "cannot authenticate password: %s", filename);
n = pdf_count_pages(ctx, doc);
for (i = 0; i < n; ++i)
{
page = pdf_load_page(ctx, doc, i);
verify_page(ctx, doc, i, page);
fz_drop_page(ctx, (fz_page*)page);
page = NULL;
}
}
fz_always(ctx)
pdf_drop_document(ctx, doc);
fz_catch(ctx)
{
fz_drop_page(ctx, (fz_page*)page);
fprintf(stderr, "error verify signatures: %s\n", fz_caught_message(ctx));
}
fz_flush_warnings(ctx);
fz_drop_context(ctx);
return 0;
}
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