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Diffstat (limited to 'auth2-none.c')
-rw-r--r--auth2-none.c69
1 files changed, 3 insertions, 66 deletions
diff --git a/auth2-none.c b/auth2-none.c
index 952b44824..10accfe55 100644
--- a/auth2-none.c
+++ b/auth2-none.c
@@ -1,4 +1,4 @@
1/* $OpenBSD: auth2-none.c,v 1.13 2006/08/05 07:52:52 dtucker Exp $ */ 1/* $OpenBSD: auth2-none.c,v 1.15 2008/07/02 12:36:39 djm Exp $ */
2/* 2/*
3 * Copyright (c) 2000 Markus Friedl. All rights reserved. 3 * Copyright (c) 2000 Markus Friedl. All rights reserved.
4 * 4 *
@@ -31,8 +31,10 @@
31 31
32#include <fcntl.h> 32#include <fcntl.h>
33#include <stdarg.h> 33#include <stdarg.h>
34#include <string.h>
34#include <unistd.h> 35#include <unistd.h>
35 36
37#include "atomicio.h"
36#include "xmalloc.h" 38#include "xmalloc.h"
37#include "key.h" 39#include "key.h"
38#include "hostfile.h" 40#include "hostfile.h"
@@ -41,7 +43,6 @@
41#include "log.h" 43#include "log.h"
42#include "buffer.h" 44#include "buffer.h"
43#include "servconf.h" 45#include "servconf.h"
44#include "atomicio.h"
45#include "compat.h" 46#include "compat.h"
46#include "ssh2.h" 47#include "ssh2.h"
47#ifdef GSSAPI 48#ifdef GSSAPI
@@ -55,75 +56,11 @@ extern ServerOptions options;
55/* "none" is allowed only one time */ 56/* "none" is allowed only one time */
56static int none_enabled = 1; 57static int none_enabled = 1;
57 58
58char *
59auth2_read_banner(void)
60{
61 struct stat st;
62 char *banner = NULL;
63 size_t len, n;
64 int fd;
65
66 if ((fd = open(options.banner, O_RDONLY)) == -1)
67 return (NULL);
68 if (fstat(fd, &st) == -1) {
69 close(fd);
70 return (NULL);
71 }
72 if (st.st_size > 1*1024*1024) {
73 close(fd);
74 return (NULL);
75 }
76
77 len = (size_t)st.st_size; /* truncate */
78 banner = xmalloc(len + 1);
79 n = atomicio(read, fd, banner, len);
80 close(fd);
81
82 if (n != len) {
83 xfree(banner);
84 return (NULL);
85 }
86 banner[n] = '\0';
87
88 return (banner);
89}
90
91void
92userauth_send_banner(const char *msg)
93{
94 if (datafellows & SSH_BUG_BANNER)
95 return;
96
97 packet_start(SSH2_MSG_USERAUTH_BANNER);
98 packet_put_cstring(msg);
99 packet_put_cstring(""); /* language, unused */
100 packet_send();
101 debug("%s: sent", __func__);
102}
103
104static void
105userauth_banner(void)
106{
107 char *banner = NULL;
108
109 if (options.banner == NULL || (datafellows & SSH_BUG_BANNER))
110 return;
111
112 if ((banner = PRIVSEP(auth2_read_banner())) == NULL)
113 goto done;
114 userauth_send_banner(banner);
115
116done:
117 if (banner)
118 xfree(banner);
119}
120
121static int 59static int
122userauth_none(Authctxt *authctxt) 60userauth_none(Authctxt *authctxt)
123{ 61{
124 none_enabled = 0; 62 none_enabled = 0;
125 packet_check_eom(); 63 packet_check_eom();
126 userauth_banner();
127#ifdef HAVE_CYGWIN 64#ifdef HAVE_CYGWIN
128 if (check_nt_auth(1, authctxt->pw) == 0) 65 if (check_nt_auth(1, authctxt->pw) == 0)
129 return (0); 66 return (0);