Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 1 | /* |
| 2 | * Kerberos v5 authentication and ticket-passing routines. |
Ben Lindstrom | 6328ab3 | 2002-03-22 02:54:23 +0000 | [diff] [blame] | 3 | * |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 4 | * $FreeBSD: src/crypto/openssh/auth-krb5.c,v 1.6 2001/02/13 16:58:04 assar Exp $ |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 5 | */ |
Ben Lindstrom | eacc71b | 2002-03-22 01:22:27 +0000 | [diff] [blame] | 6 | /* |
| 7 | * Copyright (c) 2002 Daniel Kouril. All rights reserved. |
| 8 | * |
| 9 | * Redistribution and use in source and binary forms, with or without |
| 10 | * modification, are permitted provided that the following conditions |
| 11 | * are met: |
| 12 | * 1. Redistributions of source code must retain the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer. |
| 14 | * 2. Redistributions in binary form must reproduce the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer in the |
| 16 | * documentation and/or other materials provided with the distribution. |
| 17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 28 | */ |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 29 | |
| 30 | #include "includes.h" |
Darren Tucker | ec0943a | 2003-08-11 22:55:36 +1000 | [diff] [blame^] | 31 | RCSID("$OpenBSD: auth-krb5.c,v 1.11 2003/07/16 15:02:06 markus Exp $"); |
Ben Lindstrom | 05764b9 | 2002-03-05 01:53:02 +0000 | [diff] [blame] | 32 | |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 33 | #include "ssh.h" |
| 34 | #include "ssh1.h" |
| 35 | #include "packet.h" |
| 36 | #include "xmalloc.h" |
| 37 | #include "log.h" |
| 38 | #include "servconf.h" |
| 39 | #include "uidswap.h" |
| 40 | #include "auth.h" |
| 41 | |
| 42 | #ifdef KRB5 |
Damien Miller | 9c61769 | 2003-05-14 14:31:11 +1000 | [diff] [blame] | 43 | |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 44 | #include <krb5.h> |
Damien Miller | fd4c9ee | 2002-04-13 11:04:40 +1000 | [diff] [blame] | 45 | #ifndef HEIMDAL |
| 46 | #define krb5_get_err_text(context,code) error_message(code) |
| 47 | #endif /* !HEIMDAL */ |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 48 | |
| 49 | extern ServerOptions options; |
| 50 | |
| 51 | static int |
| 52 | krb5_init(void *context) |
| 53 | { |
| 54 | Authctxt *authctxt = (Authctxt *)context; |
| 55 | krb5_error_code problem; |
| 56 | static int cleanup_registered = 0; |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 57 | |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 58 | if (authctxt->krb5_ctx == NULL) { |
| 59 | problem = krb5_init_context(&authctxt->krb5_ctx); |
| 60 | if (problem) |
| 61 | return (problem); |
| 62 | krb5_init_ets(authctxt->krb5_ctx); |
| 63 | } |
| 64 | if (!cleanup_registered) { |
| 65 | fatal_add_cleanup(krb5_cleanup_proc, authctxt); |
| 66 | cleanup_registered = 1; |
| 67 | } |
| 68 | return (0); |
| 69 | } |
| 70 | |
| 71 | /* |
| 72 | * Try krb5 authentication. server_user is passed for logging purposes |
| 73 | * only, in auth is received ticket, in client is returned principal |
| 74 | * from the ticket |
| 75 | */ |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 76 | int |
Damien Miller | 25162f2 | 2002-09-12 09:47:29 +1000 | [diff] [blame] | 77 | auth_krb5(Authctxt *authctxt, krb5_data *auth, char **client, krb5_data *reply) |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 78 | { |
| 79 | krb5_error_code problem; |
| 80 | krb5_principal server; |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 81 | krb5_ticket *ticket; |
Damien Miller | 61b05cf | 2001-11-14 00:02:10 +1100 | [diff] [blame] | 82 | int fd, ret; |
| 83 | |
| 84 | ret = 0; |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 85 | server = NULL; |
| 86 | ticket = NULL; |
Damien Miller | 25162f2 | 2002-09-12 09:47:29 +1000 | [diff] [blame] | 87 | reply->length = 0; |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 88 | |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 89 | problem = krb5_init(authctxt); |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 90 | if (problem) |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 91 | goto err; |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 92 | |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 93 | problem = krb5_auth_con_init(authctxt->krb5_ctx, |
| 94 | &authctxt->krb5_auth_ctx); |
| 95 | if (problem) |
| 96 | goto err; |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 97 | |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 98 | fd = packet_get_connection_in(); |
Damien Miller | fd4c9ee | 2002-04-13 11:04:40 +1000 | [diff] [blame] | 99 | #ifdef HEIMDAL |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 100 | problem = krb5_auth_con_setaddrs_from_fd(authctxt->krb5_ctx, |
| 101 | authctxt->krb5_auth_ctx, &fd); |
Damien Miller | fd4c9ee | 2002-04-13 11:04:40 +1000 | [diff] [blame] | 102 | #else |
| 103 | problem = krb5_auth_con_genaddrs(authctxt->krb5_ctx, |
| 104 | authctxt->krb5_auth_ctx,fd, |
| 105 | KRB5_AUTH_CONTEXT_GENERATE_REMOTE_FULL_ADDR | |
| 106 | KRB5_AUTH_CONTEXT_GENERATE_LOCAL_FULL_ADDR); |
| 107 | #endif |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 108 | if (problem) |
| 109 | goto err; |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 110 | |
Ben Lindstrom | 93576d9 | 2002-12-23 02:06:19 +0000 | [diff] [blame] | 111 | problem = krb5_sname_to_principal(authctxt->krb5_ctx, NULL, NULL, |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 112 | KRB5_NT_SRV_HST, &server); |
| 113 | if (problem) |
| 114 | goto err; |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 115 | |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 116 | problem = krb5_rd_req(authctxt->krb5_ctx, &authctxt->krb5_auth_ctx, |
| 117 | auth, server, NULL, NULL, &ticket); |
| 118 | if (problem) |
| 119 | goto err; |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 120 | |
Damien Miller | fd4c9ee | 2002-04-13 11:04:40 +1000 | [diff] [blame] | 121 | #ifdef HEIMDAL |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 122 | problem = krb5_copy_principal(authctxt->krb5_ctx, ticket->client, |
| 123 | &authctxt->krb5_user); |
Damien Miller | fd4c9ee | 2002-04-13 11:04:40 +1000 | [diff] [blame] | 124 | #else |
| 125 | problem = krb5_copy_principal(authctxt->krb5_ctx, |
| 126 | ticket->enc_part2->client, |
| 127 | &authctxt->krb5_user); |
| 128 | #endif |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 129 | if (problem) |
| 130 | goto err; |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 131 | |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 132 | /* if client wants mutual auth */ |
| 133 | problem = krb5_mk_rep(authctxt->krb5_ctx, authctxt->krb5_auth_ctx, |
Damien Miller | 25162f2 | 2002-09-12 09:47:29 +1000 | [diff] [blame] | 134 | reply); |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 135 | if (problem) |
| 136 | goto err; |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 137 | |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 138 | /* Check .k5login authorization now. */ |
| 139 | if (!krb5_kuserok(authctxt->krb5_ctx, authctxt->krb5_user, |
| 140 | authctxt->pw->pw_name)) |
| 141 | goto err; |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 142 | |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 143 | if (client) |
| 144 | krb5_unparse_name(authctxt->krb5_ctx, authctxt->krb5_user, |
| 145 | client); |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 146 | |
Damien Miller | 61b05cf | 2001-11-14 00:02:10 +1100 | [diff] [blame] | 147 | ret = 1; |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 148 | err: |
| 149 | if (server) |
| 150 | krb5_free_principal(authctxt->krb5_ctx, server); |
| 151 | if (ticket) |
| 152 | krb5_free_ticket(authctxt->krb5_ctx, ticket); |
Damien Miller | 25162f2 | 2002-09-12 09:47:29 +1000 | [diff] [blame] | 153 | if (!ret && reply->length) { |
| 154 | xfree(reply->data); |
| 155 | memset(reply, 0, sizeof(*reply)); |
| 156 | } |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 157 | |
Ben Lindstrom | b855028 | 2002-02-26 17:46:11 +0000 | [diff] [blame] | 158 | if (problem) { |
| 159 | if (authctxt->krb5_ctx != NULL) |
| 160 | debug("Kerberos v5 authentication failed: %s", |
| 161 | krb5_get_err_text(authctxt->krb5_ctx, problem)); |
| 162 | else |
| 163 | debug("Kerberos v5 authentication failed: %d", |
| 164 | problem); |
| 165 | } |
Damien Miller | 61b05cf | 2001-11-14 00:02:10 +1100 | [diff] [blame] | 166 | |
| 167 | return (ret); |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 168 | } |
| 169 | |
| 170 | int |
| 171 | auth_krb5_tgt(Authctxt *authctxt, krb5_data *tgt) |
| 172 | { |
| 173 | krb5_error_code problem; |
| 174 | krb5_ccache ccache = NULL; |
| 175 | char *pname; |
Damien Miller | fd4c9ee | 2002-04-13 11:04:40 +1000 | [diff] [blame] | 176 | krb5_creds **creds; |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 177 | |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 178 | if (authctxt->pw == NULL || authctxt->krb5_user == NULL) |
| 179 | return (0); |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 180 | |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 181 | temporarily_use_uid(authctxt->pw); |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 182 | |
Damien Miller | fd4c9ee | 2002-04-13 11:04:40 +1000 | [diff] [blame] | 183 | #ifdef HEIMDAL |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 184 | problem = krb5_cc_gen_new(authctxt->krb5_ctx, &krb5_fcc_ops, &ccache); |
Damien Miller | fd4c9ee | 2002-04-13 11:04:40 +1000 | [diff] [blame] | 185 | #else |
| 186 | { |
| 187 | char ccname[40]; |
| 188 | int tmpfd; |
| 189 | |
| 190 | snprintf(ccname,sizeof(ccname),"FILE:/tmp/krb5cc_%d_XXXXXX",geteuid()); |
| 191 | |
| 192 | if ((tmpfd = mkstemp(ccname+strlen("FILE:")))==-1) { |
Damien Miller | 996acd2 | 2003-04-09 20:59:48 +1000 | [diff] [blame] | 193 | logit("mkstemp(): %.100s", strerror(errno)); |
Damien Miller | fd4c9ee | 2002-04-13 11:04:40 +1000 | [diff] [blame] | 194 | problem = errno; |
| 195 | goto fail; |
| 196 | } |
| 197 | if (fchmod(tmpfd,S_IRUSR | S_IWUSR) == -1) { |
Damien Miller | 996acd2 | 2003-04-09 20:59:48 +1000 | [diff] [blame] | 198 | logit("fchmod(): %.100s", strerror(errno)); |
Damien Miller | fd4c9ee | 2002-04-13 11:04:40 +1000 | [diff] [blame] | 199 | close(tmpfd); |
| 200 | problem = errno; |
| 201 | goto fail; |
| 202 | } |
| 203 | close(tmpfd); |
| 204 | problem = krb5_cc_resolve(authctxt->krb5_ctx, ccname, &ccache); |
| 205 | } |
| 206 | #endif |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 207 | if (problem) |
| 208 | goto fail; |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 209 | |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 210 | problem = krb5_cc_initialize(authctxt->krb5_ctx, ccache, |
| 211 | authctxt->krb5_user); |
| 212 | if (problem) |
| 213 | goto fail; |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 214 | |
Damien Miller | fd4c9ee | 2002-04-13 11:04:40 +1000 | [diff] [blame] | 215 | #ifdef HEIMDAL |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 216 | problem = krb5_rd_cred2(authctxt->krb5_ctx, authctxt->krb5_auth_ctx, |
| 217 | ccache, tgt); |
| 218 | if (problem) |
| 219 | goto fail; |
Damien Miller | fd4c9ee | 2002-04-13 11:04:40 +1000 | [diff] [blame] | 220 | #else |
| 221 | problem = krb5_rd_cred(authctxt->krb5_ctx, authctxt->krb5_auth_ctx, |
| 222 | tgt, &creds, NULL); |
| 223 | if (problem) |
| 224 | goto fail; |
| 225 | problem = krb5_cc_store_cred(authctxt->krb5_ctx, ccache, *creds); |
| 226 | if (problem) |
| 227 | goto fail; |
| 228 | #endif |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 229 | |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 230 | authctxt->krb5_fwd_ccache = ccache; |
| 231 | ccache = NULL; |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 232 | |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 233 | authctxt->krb5_ticket_file = (char *)krb5_cc_get_name(authctxt->krb5_ctx, authctxt->krb5_fwd_ccache); |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 234 | |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 235 | problem = krb5_unparse_name(authctxt->krb5_ctx, authctxt->krb5_user, |
| 236 | &pname); |
| 237 | if (problem) |
| 238 | goto fail; |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 239 | |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 240 | debug("Kerberos v5 TGT accepted (%s)", pname); |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 241 | |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 242 | restore_uid(); |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 243 | |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 244 | return (1); |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 245 | |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 246 | fail: |
| 247 | if (problem) |
| 248 | debug("Kerberos v5 TGT passing failed: %s", |
| 249 | krb5_get_err_text(authctxt->krb5_ctx, problem)); |
| 250 | if (ccache) |
| 251 | krb5_cc_destroy(authctxt->krb5_ctx, ccache); |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 252 | |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 253 | restore_uid(); |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 254 | |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 255 | return (0); |
| 256 | } |
| 257 | |
| 258 | int |
| 259 | auth_krb5_password(Authctxt *authctxt, const char *password) |
| 260 | { |
Damien Miller | fd4c9ee | 2002-04-13 11:04:40 +1000 | [diff] [blame] | 261 | #ifndef HEIMDAL |
| 262 | krb5_creds creds; |
| 263 | krb5_principal server; |
| 264 | char ccname[40]; |
| 265 | int tmpfd; |
| 266 | #endif |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 267 | krb5_error_code problem; |
Darren Tucker | ec0943a | 2003-08-11 22:55:36 +1000 | [diff] [blame^] | 268 | krb5_ccache ccache = NULL; |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 269 | |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 270 | if (authctxt->pw == NULL) |
| 271 | return (0); |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 272 | |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 273 | temporarily_use_uid(authctxt->pw); |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 274 | |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 275 | problem = krb5_init(authctxt); |
| 276 | if (problem) |
| 277 | goto out; |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 278 | |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 279 | problem = krb5_parse_name(authctxt->krb5_ctx, authctxt->pw->pw_name, |
| 280 | &authctxt->krb5_user); |
| 281 | if (problem) |
| 282 | goto out; |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 283 | |
Damien Miller | fd4c9ee | 2002-04-13 11:04:40 +1000 | [diff] [blame] | 284 | #ifdef HEIMDAL |
Darren Tucker | ec0943a | 2003-08-11 22:55:36 +1000 | [diff] [blame^] | 285 | problem = krb5_cc_gen_new(authctxt->krb5_ctx, &krb5_mcc_ops, &ccache); |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 286 | if (problem) |
| 287 | goto out; |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 288 | |
Darren Tucker | ec0943a | 2003-08-11 22:55:36 +1000 | [diff] [blame^] | 289 | problem = krb5_cc_initialize(authctxt->krb5_ctx, ccache, |
| 290 | authctxt->krb5_user); |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 291 | if (problem) |
| 292 | goto out; |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 293 | |
| 294 | restore_uid(); |
Darren Tucker | ec0943a | 2003-08-11 22:55:36 +1000 | [diff] [blame^] | 295 | |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 296 | problem = krb5_verify_user(authctxt->krb5_ctx, authctxt->krb5_user, |
Darren Tucker | ec0943a | 2003-08-11 22:55:36 +1000 | [diff] [blame^] | 297 | ccache, password, 1, NULL); |
| 298 | |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 299 | temporarily_use_uid(authctxt->pw); |
| 300 | |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 301 | if (problem) |
| 302 | goto out; |
Darren Tucker | ec0943a | 2003-08-11 22:55:36 +1000 | [diff] [blame^] | 303 | problem = krb5_cc_gen_new(authctxt->krb5_ctx, &krb5_fcc_ops, |
| 304 | &authctxt->krb5_fwd_ccache); |
| 305 | if (problem) |
| 306 | goto out; |
| 307 | |
| 308 | problem = krb5_cc_copy_cache(authctxt->krb5_ctx, ccache, |
| 309 | authctxt->krb5_fwd_ccache); |
| 310 | krb5_cc_destroy(authctxt->krb5_ctx, ccache); |
| 311 | ccache = NULL; |
| 312 | if (problem) |
| 313 | goto out; |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 314 | |
Damien Miller | fd4c9ee | 2002-04-13 11:04:40 +1000 | [diff] [blame] | 315 | #else |
| 316 | problem = krb5_get_init_creds_password(authctxt->krb5_ctx, &creds, |
| 317 | authctxt->krb5_user, (char *)password, NULL, NULL, 0, NULL, NULL); |
| 318 | if (problem) |
| 319 | goto out; |
| 320 | |
| 321 | problem = krb5_sname_to_principal(authctxt->krb5_ctx, NULL, NULL, |
| 322 | KRB5_NT_SRV_HST, &server); |
| 323 | if (problem) |
| 324 | goto out; |
| 325 | |
| 326 | restore_uid(); |
| 327 | problem = krb5_verify_init_creds(authctxt->krb5_ctx, &creds, server, |
| 328 | NULL, NULL, NULL); |
| 329 | krb5_free_principal(authctxt->krb5_ctx, server); |
| 330 | temporarily_use_uid(authctxt->pw); |
| 331 | if (problem) |
| 332 | goto out; |
| 333 | |
| 334 | if (!krb5_kuserok(authctxt->krb5_ctx, authctxt->krb5_user, |
| 335 | authctxt->pw->pw_name)) { |
Ben Lindstrom | 5a6abda | 2002-06-09 19:41:48 +0000 | [diff] [blame] | 336 | problem = -1; |
Damien Miller | fd4c9ee | 2002-04-13 11:04:40 +1000 | [diff] [blame] | 337 | goto out; |
| 338 | } |
| 339 | |
| 340 | snprintf(ccname,sizeof(ccname),"FILE:/tmp/krb5cc_%d_XXXXXX",geteuid()); |
| 341 | |
| 342 | if ((tmpfd = mkstemp(ccname+strlen("FILE:")))==-1) { |
Damien Miller | 996acd2 | 2003-04-09 20:59:48 +1000 | [diff] [blame] | 343 | logit("mkstemp(): %.100s", strerror(errno)); |
Damien Miller | fd4c9ee | 2002-04-13 11:04:40 +1000 | [diff] [blame] | 344 | problem = errno; |
| 345 | goto out; |
| 346 | } |
| 347 | |
| 348 | if (fchmod(tmpfd,S_IRUSR | S_IWUSR) == -1) { |
Damien Miller | 996acd2 | 2003-04-09 20:59:48 +1000 | [diff] [blame] | 349 | logit("fchmod(): %.100s", strerror(errno)); |
Damien Miller | fd4c9ee | 2002-04-13 11:04:40 +1000 | [diff] [blame] | 350 | close(tmpfd); |
| 351 | problem = errno; |
| 352 | goto out; |
| 353 | } |
| 354 | close(tmpfd); |
| 355 | |
| 356 | problem = krb5_cc_resolve(authctxt->krb5_ctx, ccname, &authctxt->krb5_fwd_ccache); |
| 357 | if (problem) |
| 358 | goto out; |
| 359 | |
| 360 | problem = krb5_cc_initialize(authctxt->krb5_ctx, authctxt->krb5_fwd_ccache, |
| 361 | authctxt->krb5_user); |
| 362 | if (problem) |
| 363 | goto out; |
| 364 | |
| 365 | problem= krb5_cc_store_cred(authctxt->krb5_ctx, authctxt->krb5_fwd_ccache, |
| 366 | &creds); |
| 367 | if (problem) |
| 368 | goto out; |
| 369 | #endif |
| 370 | |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 371 | authctxt->krb5_ticket_file = (char *)krb5_cc_get_name(authctxt->krb5_ctx, authctxt->krb5_fwd_ccache); |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 372 | |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 373 | out: |
| 374 | restore_uid(); |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 375 | |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 376 | if (problem) { |
Darren Tucker | ec0943a | 2003-08-11 22:55:36 +1000 | [diff] [blame^] | 377 | if (ccache) |
| 378 | krb5_cc_destroy(authctxt->krb5_ctx, ccache); |
| 379 | |
Damien Miller | fd4c9ee | 2002-04-13 11:04:40 +1000 | [diff] [blame] | 380 | if (authctxt->krb5_ctx != NULL && problem!=-1) |
Ben Lindstrom | b855028 | 2002-02-26 17:46:11 +0000 | [diff] [blame] | 381 | debug("Kerberos password authentication failed: %s", |
| 382 | krb5_get_err_text(authctxt->krb5_ctx, problem)); |
| 383 | else |
| 384 | debug("Kerberos password authentication failed: %d", |
| 385 | problem); |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 386 | |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 387 | krb5_cleanup_proc(authctxt); |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 388 | |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 389 | if (options.kerberos_or_local_passwd) |
| 390 | return (-1); |
| 391 | else |
| 392 | return (0); |
| 393 | } |
| 394 | return (1); |
| 395 | } |
| 396 | |
| 397 | void |
| 398 | krb5_cleanup_proc(void *context) |
| 399 | { |
| 400 | Authctxt *authctxt = (Authctxt *)context; |
Damien Miller | db95e4e | 2002-02-13 16:56:44 +1100 | [diff] [blame] | 401 | |
Damien Miller | 964fed5 | 2001-09-25 12:58:23 +1000 | [diff] [blame] | 402 | debug("krb5_cleanup_proc called"); |
| 403 | if (authctxt->krb5_fwd_ccache) { |
| 404 | krb5_cc_destroy(authctxt->krb5_ctx, authctxt->krb5_fwd_ccache); |
| 405 | authctxt->krb5_fwd_ccache = NULL; |
| 406 | } |
| 407 | if (authctxt->krb5_user) { |
| 408 | krb5_free_principal(authctxt->krb5_ctx, authctxt->krb5_user); |
| 409 | authctxt->krb5_user = NULL; |
| 410 | } |
| 411 | if (authctxt->krb5_auth_ctx) { |
| 412 | krb5_auth_con_free(authctxt->krb5_ctx, |
| 413 | authctxt->krb5_auth_ctx); |
| 414 | authctxt->krb5_auth_ctx = NULL; |
| 415 | } |
| 416 | if (authctxt->krb5_ctx) { |
| 417 | krb5_free_context(authctxt->krb5_ctx); |
| 418 | authctxt->krb5_ctx = NULL; |
| 419 | } |
| 420 | } |
| 421 | |
| 422 | #endif /* KRB5 */ |