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Diffstat (limited to 'auth2-none.c')
-rw-r--r--auth2-none.c72
1 files changed, 3 insertions, 69 deletions
diff --git a/auth2-none.c b/auth2-none.c
index 28e593e6c..10accfe55 100644
--- a/auth2-none.c
+++ b/auth2-none.c
@@ -1,4 +1,4 @@
1/* $OpenBSD: auth2-none.c,v 1.14 2007/08/23 03:22:16 djm 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 *
@@ -31,9 +31,10 @@
31 31
32#include <fcntl.h> 32#include <fcntl.h>
33#include <stdarg.h> 33#include <stdarg.h>
34#include <unistd.h>
35#include <string.h> 34#include <string.h>
35#include <unistd.h>
36 36
37#include "atomicio.h"
37#include "xmalloc.h" 38#include "xmalloc.h"
38#include "key.h" 39#include "key.h"
39#include "hostfile.h" 40#include "hostfile.h"
@@ -42,7 +43,6 @@
42#include "log.h" 43#include "log.h"
43#include "buffer.h" 44#include "buffer.h"
44#include "servconf.h" 45#include "servconf.h"
45#include "atomicio.h"
46#include "compat.h" 46#include "compat.h"
47#include "ssh2.h" 47#include "ssh2.h"
48#ifdef GSSAPI 48#ifdef GSSAPI
@@ -56,77 +56,11 @@ extern ServerOptions options;
56/* "none" is allowed only one time */ 56/* "none" is allowed only one time */
57static int none_enabled = 1; 57static int none_enabled = 1;
58 58
59char *
60auth2_read_banner(void)
61{
62 struct stat st;
63 char *banner = NULL;
64 size_t len, n;
65 int fd;
66
67 if ((fd = open(options.banner, O_RDONLY)) == -1)
68 return (NULL);
69 if (fstat(fd, &st) == -1) {
70 close(fd);
71 return (NULL);
72 }
73 if (st.st_size > 1*1024*1024) {
74 close(fd);
75 return (NULL);
76 }
77
78 len = (size_t)st.st_size; /* truncate */
79 banner = xmalloc(len + 1);
80 n = atomicio(read, fd, banner, len);
81 close(fd);
82
83 if (n != len) {
84 xfree(banner);
85 return (NULL);
86 }
87 banner[n] = '\0';
88
89 return (banner);
90}
91
92void
93userauth_send_banner(const char *msg)
94{
95 if (datafellows & SSH_BUG_BANNER)
96 return;
97
98 packet_start(SSH2_MSG_USERAUTH_BANNER);
99 packet_put_cstring(msg);
100 packet_put_cstring(""); /* language, unused */
101 packet_send();
102 debug("%s: sent", __func__);
103}
104
105static void
106userauth_banner(void)
107{
108 char *banner = NULL;
109
110 if (options.banner == NULL ||
111 strcasecmp(options.banner, "none") == 0 ||
112 (datafellows & SSH_BUG_BANNER) != 0)
113 return;
114
115 if ((banner = PRIVSEP(auth2_read_banner())) == NULL)
116 goto done;
117 userauth_send_banner(banner);
118
119done:
120 if (banner)
121 xfree(banner);
122}
123
124static int 59static int
125userauth_none(Authctxt *authctxt) 60userauth_none(Authctxt *authctxt)
126{ 61{
127 none_enabled = 0; 62 none_enabled = 0;
128 packet_check_eom(); 63 packet_check_eom();
129 userauth_banner();
130#ifdef HAVE_CYGWIN 64#ifdef HAVE_CYGWIN
131 if (check_nt_auth(1, authctxt->pw) == 0) 65 if (check_nt_auth(1, authctxt->pw) == 0)
132 return (0); 66 return (0);