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
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
|
/* $FreeBSD$ */
/* $OpenBSD: check.c,v 1.2 1999/10/04 21:46:27 espie Exp $ */
/*-
* Copyright (c) 1999 Marc Espie.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Marc Espie for the OpenBSD
* Project.
*
* THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBSD
* PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/* Simple code for a stand-alone package checker */
#include <sys/types.h>
#include <sys/wait.h>
#include <stdlib.h>
#include <stdio.h>
#include "stand.h"
#include "pgp.h"
#include "gzip.h"
#include "extern.h"
struct checker {
void *context;
void (*add)(void *, const char *, size_t);
int (*get)(void *);
int status;
};
#define MAX_CHECKERS 20
int
check_signature(file, userid, envp, filename)
/*@dependent@*/FILE *file;
const char *userid;
char *envp[];
/*@observer@*/const char *filename;
{
struct signature *sign;
struct mygzip_header h;
int status;
char buffer[1024];
size_t length;
struct checker checker[MAX_CHECKERS];
struct signature *sweep;
int i, j;
status = read_header_and_diagnose(file, &h, &sign, filename);
if (status != 1)
return PKG_UNSIGNED;
for (sweep = sign, i = 0;
sweep != NULL && i < MAX_CHECKERS;
sweep=sweep->next, i++) {
switch(sweep->type) {
case TAG_OLD:
fprintf(stderr, "File %s uses old signatures, no longer supported\n",
filename);
checker[i].context = NULL;
break;
case TAG_X509:
checker[i].context = new_x509_checker(&h, sweep, userid, envp, filename);
checker[i].add = x509_add;
checker[i].get = x509_sign_ok;
break;
case TAG_SHA1:
checker[i].context = new_sha1_checker(&h, sweep, userid, envp, filename);
checker[i].add = sha1_add;
checker[i].get = sha1_sign_ok;
break;
case TAG_PGP:
checker[i].context = new_pgp_checker(&h, sweep, userid, envp, filename);
checker[i].add = pgp_add;
checker[i].get = pgp_sign_ok;
break;
default:
abort();
}
}
while ((length = fread(buffer, 1, sizeof buffer, file)) > 0) {
for (j = 0; j < i; j++) {
if (checker[j].context) {
(*checker[j].add)(checker[j].context, buffer, length);
}
}
}
// for (j = i-1; j >= 0; j--)
for (j = 0; j < i; j++) {
if (checker[j].context) {
checker[j].status = (*checker[j].get)(checker[j].context);
} else {
checker[j].status = PKG_SIGERROR;
}
}
free_signature(sign);
return checker[0].status;
}
|
