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File: [local] / src / usr.bin / ssh / auth-krb5.c (download)
Revision 1.19, Thu Aug 3 03:34:41 2006 UTC (17 years, 10 months ago) by deraadt
almost entirely get rid of the culture of ".h files that include .h files" ok djm, sort of ok stevesk makes the pain stop in one easy step |
/* $OpenBSD: auth-krb5.c,v 1.19 2006/08/03 03:34:41 deraadt Exp $ */ /* * Kerberos v5 authentication and ticket-passing routines. * * $FreeBSD: src/crypto/openssh/auth-krb5.c,v 1.6 2001/02/13 16:58:04 assar Exp $ */ /* * Copyright (c) 2002 Daniel Kouril. All rights reserved. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. */ #include <sys/types.h> #include <pwd.h> #include <stdarg.h> #include "xmalloc.h" #include "ssh.h" #include "ssh1.h" #include "packet.h" #include "log.h" #include "buffer.h" #include "servconf.h" #include "uidswap.h" #include "key.h" #include "hostfile.h" #include "auth.h" #ifdef KRB5 #include <krb5.h> extern ServerOptions options; static int krb5_init(void *context) { Authctxt *authctxt = (Authctxt *)context; krb5_error_code problem; if (authctxt->krb5_ctx == NULL) { problem = krb5_init_context(&authctxt->krb5_ctx); if (problem) return (problem); krb5_init_ets(authctxt->krb5_ctx); } return (0); } int auth_krb5_password(Authctxt *authctxt, const char *password) { krb5_error_code problem; krb5_ccache ccache = NULL; temporarily_use_uid(authctxt->pw); problem = krb5_init(authctxt); if (problem) goto out; problem = krb5_parse_name(authctxt->krb5_ctx, authctxt->pw->pw_name, &authctxt->krb5_user); if (problem) goto out; problem = krb5_cc_gen_new(authctxt->krb5_ctx, &krb5_mcc_ops, &ccache); if (problem) goto out; problem = krb5_cc_initialize(authctxt->krb5_ctx, ccache, authctxt->krb5_user); if (problem) goto out; restore_uid(); problem = krb5_verify_user(authctxt->krb5_ctx, authctxt->krb5_user, ccache, password, 1, NULL); temporarily_use_uid(authctxt->pw); if (problem) goto out; problem = krb5_cc_gen_new(authctxt->krb5_ctx, &krb5_fcc_ops, &authctxt->krb5_fwd_ccache); if (problem) goto out; problem = krb5_cc_copy_cache(authctxt->krb5_ctx, ccache, authctxt->krb5_fwd_ccache); krb5_cc_destroy(authctxt->krb5_ctx, ccache); ccache = NULL; if (problem) goto out; authctxt->krb5_ticket_file = (char *)krb5_cc_get_name(authctxt->krb5_ctx, authctxt->krb5_fwd_ccache); out: restore_uid(); if (problem) { if (ccache) krb5_cc_destroy(authctxt->krb5_ctx, ccache); if (authctxt->krb5_ctx != NULL) debug("Kerberos password authentication failed: %s", krb5_get_err_text(authctxt->krb5_ctx, problem)); else debug("Kerberos password authentication failed: %d", problem); krb5_cleanup_proc(authctxt); if (options.kerberos_or_local_passwd) return (-1); else return (0); } return (authctxt->valid ? 1 : 0); } void krb5_cleanup_proc(Authctxt *authctxt) { debug("krb5_cleanup_proc called"); if (authctxt->krb5_fwd_ccache) { krb5_cc_destroy(authctxt->krb5_ctx, authctxt->krb5_fwd_ccache); authctxt->krb5_fwd_ccache = NULL; } if (authctxt->krb5_user) { krb5_free_principal(authctxt->krb5_ctx, authctxt->krb5_user); authctxt->krb5_user = NULL; } if (authctxt->krb5_ctx) { krb5_free_context(authctxt->krb5_ctx); authctxt->krb5_ctx = NULL; } } #endif /* KRB5 */