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
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
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
/*
* 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 = NULL;
pdf_document *doc = NULL;
char *password = "";
int i, n, c;
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_try(ctx)
{
doc = pdf_open_document(ctx, filename);
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)
{
pdf_page *page = pdf_load_page(ctx, doc, i);
verify_page(ctx, doc, i, page);
fz_drop_page(ctx, (fz_page*)page);
}
}
fz_catch(ctx)
{
}
pdf_drop_document(ctx, doc);
fz_flush_warnings(ctx);
fz_drop_context(ctx);
return 0;
}
|
