X-Git-Url: http://andersk.mit.edu/gitweb/openssh.git/blobdiff_plain/c12337d922ffbf376f2cbeef86e48a3b4560be9d..d60970230cf34217f9cb75f58790dd1a73703ba1:/auth-krb5.c diff --git a/auth-krb5.c b/auth-krb5.c index aaf146e7..308a6d5f 100644 --- a/auth-krb5.c +++ b/auth-krb5.c @@ -1,11 +1,35 @@ /* * 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 $ - * $OpenBSD: auth-krb5.c,v 1.5 2002/02/15 23:54:10 markus 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 "includes.h" +RCSID("$OpenBSD: auth-krb5.c,v 1.8 2002/03/19 10:49:35 markus Exp $"); + #include "ssh.h" #include "ssh1.h" #include "packet.h" @@ -17,6 +41,9 @@ #ifdef KRB5 #include +#ifndef HEIMDAL +#define krb5_get_err_text(context,code) error_message(code) +#endif /* !HEIMDAL */ extern ServerOptions options; @@ -69,8 +96,15 @@ auth_krb5(Authctxt *authctxt, krb5_data *auth, char **client) goto err; fd = packet_get_connection_in(); +#ifdef HEIMDAL problem = krb5_auth_con_setaddrs_from_fd(authctxt->krb5_ctx, authctxt->krb5_auth_ctx, &fd); +#else + problem = krb5_auth_con_genaddrs(authctxt->krb5_ctx, + authctxt->krb5_auth_ctx,fd, + KRB5_AUTH_CONTEXT_GENERATE_REMOTE_FULL_ADDR | + KRB5_AUTH_CONTEXT_GENERATE_LOCAL_FULL_ADDR); +#endif if (problem) goto err; @@ -84,8 +118,14 @@ auth_krb5(Authctxt *authctxt, krb5_data *auth, char **client) if (problem) goto err; +#ifdef HEIMDAL problem = krb5_copy_principal(authctxt->krb5_ctx, ticket->client, &authctxt->krb5_user); +#else + problem = krb5_copy_principal(authctxt->krb5_ctx, + ticket->enc_part2->client, + &authctxt->krb5_user); +#endif if (problem) goto err; @@ -136,13 +176,37 @@ auth_krb5_tgt(Authctxt *authctxt, krb5_data *tgt) krb5_error_code problem; krb5_ccache ccache = NULL; char *pname; + krb5_creds **creds; if (authctxt->pw == NULL || authctxt->krb5_user == NULL) return (0); temporarily_use_uid(authctxt->pw); +#ifdef HEIMDAL problem = krb5_cc_gen_new(authctxt->krb5_ctx, &krb5_fcc_ops, &ccache); +#else +{ + char ccname[40]; + int tmpfd; + + snprintf(ccname,sizeof(ccname),"FILE:/tmp/krb5cc_%d_XXXXXX",geteuid()); + + if ((tmpfd = mkstemp(ccname+strlen("FILE:")))==-1) { + log("mkstemp(): %.100s", strerror(errno)); + problem = errno; + goto fail; + } + if (fchmod(tmpfd,S_IRUSR | S_IWUSR) == -1) { + log("fchmod(): %.100s", strerror(errno)); + close(tmpfd); + problem = errno; + goto fail; + } + close(tmpfd); + problem = krb5_cc_resolve(authctxt->krb5_ctx, ccname, &ccache); +} +#endif if (problem) goto fail; @@ -151,10 +215,20 @@ auth_krb5_tgt(Authctxt *authctxt, krb5_data *tgt) if (problem) goto fail; +#ifdef HEIMDAL problem = krb5_rd_cred2(authctxt->krb5_ctx, authctxt->krb5_auth_ctx, ccache, tgt); if (problem) goto fail; +#else + problem = krb5_rd_cred(authctxt->krb5_ctx, authctxt->krb5_auth_ctx, + tgt, &creds, NULL); + if (problem) + goto fail; + problem = krb5_cc_store_cred(authctxt->krb5_ctx, ccache, *creds); + if (problem) + goto fail; +#endif authctxt->krb5_fwd_ccache = ccache; ccache = NULL; @@ -187,6 +261,12 @@ auth_krb5_tgt(Authctxt *authctxt, krb5_data *tgt) int auth_krb5_password(Authctxt *authctxt, const char *password) { +#ifndef HEIMDAL + krb5_creds creds; + krb5_principal server; + char ccname[40]; + int tmpfd; +#endif krb5_error_code problem; if (authctxt->pw == NULL) @@ -203,6 +283,7 @@ auth_krb5_password(Authctxt *authctxt, const char *password) if (problem) goto out; +#ifdef HEIMDAL problem = krb5_cc_gen_new(authctxt->krb5_ctx, &krb5_mcc_ops, &authctxt->krb5_fwd_ccache); if (problem) @@ -221,13 +302,69 @@ auth_krb5_password(Authctxt *authctxt, const char *password) if (problem) goto out; +#else + problem = krb5_get_init_creds_password(authctxt->krb5_ctx, &creds, + authctxt->krb5_user, (char *)password, NULL, NULL, 0, NULL, NULL); + if (problem) + goto out; + + problem = krb5_sname_to_principal(authctxt->krb5_ctx, NULL, NULL, + KRB5_NT_SRV_HST, &server); + if (problem) + goto out; + + restore_uid(); + problem = krb5_verify_init_creds(authctxt->krb5_ctx, &creds, server, + NULL, NULL, NULL); + krb5_free_principal(authctxt->krb5_ctx, server); + temporarily_use_uid(authctxt->pw); + if (problem) + goto out; + + if (!krb5_kuserok(authctxt->krb5_ctx, authctxt->krb5_user, + authctxt->pw->pw_name)) { + problem = -1; + goto out; + } + + snprintf(ccname,sizeof(ccname),"FILE:/tmp/krb5cc_%d_XXXXXX",geteuid()); + + if ((tmpfd = mkstemp(ccname+strlen("FILE:")))==-1) { + log("mkstemp(): %.100s", strerror(errno)); + problem = errno; + goto out; + } + + if (fchmod(tmpfd,S_IRUSR | S_IWUSR) == -1) { + log("fchmod(): %.100s", strerror(errno)); + close(tmpfd); + problem = errno; + goto out; + } + close(tmpfd); + + problem = krb5_cc_resolve(authctxt->krb5_ctx, ccname, &authctxt->krb5_fwd_ccache); + if (problem) + goto out; + + problem = krb5_cc_initialize(authctxt->krb5_ctx, authctxt->krb5_fwd_ccache, + authctxt->krb5_user); + if (problem) + goto out; + + problem= krb5_cc_store_cred(authctxt->krb5_ctx, authctxt->krb5_fwd_ccache, + &creds); + if (problem) + goto out; +#endif + authctxt->krb5_ticket_file = (char *)krb5_cc_get_name(authctxt->krb5_ctx, authctxt->krb5_fwd_ccache); out: restore_uid(); if (problem) { - if (authctxt->krb5_ctx != NULL) + if (authctxt->krb5_ctx != NULL && problem!=-1) debug("Kerberos password authentication failed: %s", krb5_get_err_text(authctxt->krb5_ctx, problem)); else