Annotation of src/usr.bin/ssh/auth2-none.c, Revision 1.1
1.1 ! markus 1: /*
! 2: * Copyright (c) 2000 Markus Friedl. All rights reserved.
! 3: *
! 4: * Redistribution and use in source and binary forms, with or without
! 5: * modification, are permitted provided that the following conditions
! 6: * are met:
! 7: * 1. Redistributions of source code must retain the above copyright
! 8: * notice, this list of conditions and the following disclaimer.
! 9: * 2. Redistributions in binary form must reproduce the above copyright
! 10: * notice, this list of conditions and the following disclaimer in the
! 11: * documentation and/or other materials provided with the distribution.
! 12: *
! 13: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 14: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 15: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 16: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
! 17: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 18: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 19: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 20: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 21: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
! 22: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 23: */
! 24:
! 25: #include "includes.h"
! 26: RCSID("$OpenBSD: auth2.c,v 1.91 2002/05/13 02:37:39 itojun Exp $");
! 27:
! 28: #include "auth.h"
! 29: #include "xmalloc.h"
! 30: #include "packet.h"
! 31: #include "log.h"
! 32: #include "servconf.h"
! 33: #include "atomicio.h"
! 34: #include "compat.h"
! 35: #include "ssh2.h"
! 36: #include "monitor_wrap.h"
! 37:
! 38: /* import */
! 39: extern ServerOptions options;
! 40:
! 41: char *
! 42: auth2_read_banner(void)
! 43: {
! 44: struct stat st;
! 45: char *banner = NULL;
! 46: off_t len, n;
! 47: int fd;
! 48:
! 49: if ((fd = open(options.banner, O_RDONLY)) == -1)
! 50: return (NULL);
! 51: if (fstat(fd, &st) == -1) {
! 52: close(fd);
! 53: return (NULL);
! 54: }
! 55: len = st.st_size;
! 56: banner = xmalloc(len + 1);
! 57: n = atomicio(read, fd, banner, len);
! 58: close(fd);
! 59:
! 60: if (n != len) {
! 61: free(banner);
! 62: return (NULL);
! 63: }
! 64: banner[n] = '\0';
! 65:
! 66: return (banner);
! 67: }
! 68:
! 69: static void
! 70: userauth_banner(void)
! 71: {
! 72: char *banner = NULL;
! 73:
! 74: if (options.banner == NULL || (datafellows & SSH_BUG_BANNER))
! 75: return;
! 76:
! 77: if ((banner = PRIVSEP(auth2_read_banner())) == NULL)
! 78: goto done;
! 79:
! 80: packet_start(SSH2_MSG_USERAUTH_BANNER);
! 81: packet_put_cstring(banner);
! 82: packet_put_cstring(""); /* language, unused */
! 83: packet_send();
! 84: debug("userauth_banner: sent");
! 85: done:
! 86: if (banner)
! 87: xfree(banner);
! 88: return;
! 89: }
! 90:
! 91: int
! 92: userauth_none(Authctxt *authctxt)
! 93: {
! 94: static int called = 0;
! 95:
! 96: if (called)
! 97: return (0);
! 98: called = 1;
! 99: packet_check_eom();
! 100: userauth_banner();
! 101: return (authctxt->valid ? PRIVSEP(auth_password(authctxt, "")) : 0);
! 102: }