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43fcc1b0 | 1 | /* ssl/kssl.c -*- mode: C; c-file-style: "eay" -*- */ |
0f113f3e MC |
2 | /* |
3 | * Written by Vern Staats <staatsvr@asc.hpc.mil> for the OpenSSL project | |
4 | * 2000. | |
43fcc1b0 RL |
5 | */ |
6 | /* ==================================================================== | |
7 | * Copyright (c) 2000 The OpenSSL Project. 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 | * | |
13 | * 1. Redistributions of source code must retain the above copyright | |
0f113f3e | 14 | * notice, this list of conditions and the following disclaimer. |
43fcc1b0 RL |
15 | * |
16 | * 2. Redistributions in binary form must reproduce the above copyright | |
17 | * notice, this list of conditions and the following disclaimer in | |
18 | * the documentation and/or other materials provided with the | |
19 | * distribution. | |
20 | * | |
21 | * 3. All advertising materials mentioning features or use of this | |
22 | * software must display the following acknowledgment: | |
23 | * "This product includes software developed by the OpenSSL Project | |
24 | * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" | |
25 | * | |
26 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
27 | * endorse or promote products derived from this software without | |
28 | * prior written permission. For written permission, please contact | |
29 | * licensing@OpenSSL.org. | |
30 | * | |
31 | * 5. Products derived from this software may not be called "OpenSSL" | |
32 | * nor may "OpenSSL" appear in their names without prior written | |
33 | * permission of the OpenSSL Project. | |
34 | * | |
35 | * 6. Redistributions of any form whatsoever must retain the following | |
36 | * acknowledgment: | |
37 | * "This product includes software developed by the OpenSSL Project | |
38 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | |
39 | * | |
40 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
41 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
42 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
43 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
44 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
45 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
46 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
47 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
49 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
50 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
51 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
52 | * ==================================================================== | |
53 | * | |
54 | * This product includes cryptographic software written by Eric Young | |
55 | * (eay@cryptsoft.com). This product includes software written by Tim | |
56 | * Hudson (tjh@cryptsoft.com). | |
57 | * | |
58 | */ | |
59 | ||
1d97c843 TH |
60 | /*- |
61 | * ssl/kssl.c -- Routines to support (& debug) Kerberos5 auth for openssl | |
62 | * | |
0f113f3e MC |
63 | * 19990701 VRS Started. |
64 | * 200011?? Jeffrey Altman, Richard Levitte | |
65 | * Generalized for Heimdal, Newer MIT, & Win32. | |
66 | * Integrated into main OpenSSL 0.9.7 snapshots. | |
67 | * 20010413 Simon Wilkinson, VRS | |
68 | * Real RFC2712 KerberosWrapper replaces AP_REQ. | |
1d97c843 | 69 | */ |
43fcc1b0 | 70 | |
7bd51947 | 71 | #include <openssl/opensslconf.h> |
116daf4c | 72 | |
7e998124 | 73 | #include <string.h> |
2a1ef754 | 74 | |
0f113f3e | 75 | #define KRB5_PRIVATE 1 |
0858b71b | 76 | |
43fcc1b0 | 77 | #include <openssl/ssl.h> |
2a1ef754 RL |
78 | #include <openssl/evp.h> |
79 | #include <openssl/objects.h> | |
80 | #include <openssl/krb5_asn.h> | |
ef236ec3 | 81 | #include "kssl_lcl.h" |
43fcc1b0 | 82 | |
116daf4c RL |
83 | #ifndef OPENSSL_NO_KRB5 |
84 | ||
0f113f3e MC |
85 | # ifndef ENOMEM |
86 | # define ENOMEM KRB5KRB_ERR_GENERIC | |
87 | # endif | |
0858b71b | 88 | |
0f113f3e | 89 | /* |
f9b3bff6 RL |
90 | * When OpenSSL is built on Windows, we do not want to require that |
91 | * the Kerberos DLLs be available in order for the OpenSSL DLLs to | |
92 | * work. Therefore, all Kerberos routines are loaded at run time | |
93 | * and we do not link to a .LIB file. | |
94 | */ | |
95 | ||
0f113f3e MC |
96 | # if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32) |
97 | /* | |
f9b3bff6 RL |
98 | * The purpose of the following pre-processor statements is to provide |
99 | * compatibility with different releases of MIT Kerberos for Windows. | |
100 | * All versions up to 1.2 used macros. But macros do not allow for | |
101 | * a binary compatible interface for DLLs. Therefore, all macros are | |
102 | * being replaced by function calls. The following code will allow | |
103 | * an OpenSSL DLL built on Windows to work whether or not the macro | |
104 | * or function form of the routines are utilized. | |
105 | */ | |
0f113f3e MC |
106 | # ifdef krb5_cc_get_principal |
107 | # define NO_DEF_KRB5_CCACHE | |
108 | # undef krb5_cc_get_principal | |
109 | # endif | |
110 | # define krb5_cc_get_principal kssl_krb5_cc_get_principal | |
111 | ||
112 | # define krb5_free_data_contents kssl_krb5_free_data_contents | |
113 | # define krb5_free_context kssl_krb5_free_context | |
114 | # define krb5_auth_con_free kssl_krb5_auth_con_free | |
115 | # define krb5_free_principal kssl_krb5_free_principal | |
116 | # define krb5_mk_req_extended kssl_krb5_mk_req_extended | |
117 | # define krb5_get_credentials kssl_krb5_get_credentials | |
118 | # define krb5_cc_default kssl_krb5_cc_default | |
119 | # define krb5_sname_to_principal kssl_krb5_sname_to_principal | |
120 | # define krb5_init_context kssl_krb5_init_context | |
121 | # define krb5_free_ticket kssl_krb5_free_ticket | |
122 | # define krb5_rd_req kssl_krb5_rd_req | |
123 | # define krb5_kt_default kssl_krb5_kt_default | |
124 | # define krb5_kt_resolve kssl_krb5_kt_resolve | |
47ff5c62 | 125 | /* macros in mit 1.2.2 and earlier; functions in mit 1.2.3 and greater */ |
0f113f3e MC |
126 | # ifndef krb5_kt_close |
127 | # define krb5_kt_close kssl_krb5_kt_close | |
128 | # endif /* krb5_kt_close */ | |
129 | # ifndef krb5_kt_get_entry | |
130 | # define krb5_kt_get_entry kssl_krb5_kt_get_entry | |
131 | # endif /* krb5_kt_get_entry */ | |
132 | # define krb5_auth_con_init kssl_krb5_auth_con_init | |
133 | ||
134 | # define krb5_principal_compare kssl_krb5_principal_compare | |
135 | # define krb5_decrypt_tkt_part kssl_krb5_decrypt_tkt_part | |
136 | # define krb5_timeofday kssl_krb5_timeofday | |
137 | # define krb5_rc_default kssl_krb5_rc_default | |
138 | ||
139 | # ifdef krb5_rc_initialize | |
140 | # undef krb5_rc_initialize | |
141 | # endif | |
142 | # define krb5_rc_initialize kssl_krb5_rc_initialize | |
143 | ||
144 | # ifdef krb5_rc_get_lifespan | |
145 | # undef krb5_rc_get_lifespan | |
146 | # endif | |
147 | # define krb5_rc_get_lifespan kssl_krb5_rc_get_lifespan | |
148 | ||
149 | # ifdef krb5_rc_destroy | |
150 | # undef krb5_rc_destroy | |
151 | # endif | |
152 | # define krb5_rc_destroy kssl_krb5_rc_destroy | |
153 | ||
154 | # define valid_cksumtype kssl_valid_cksumtype | |
155 | # define krb5_checksum_size kssl_krb5_checksum_size | |
156 | # define krb5_kt_free_entry kssl_krb5_kt_free_entry | |
157 | # define krb5_auth_con_setrcache kssl_krb5_auth_con_setrcache | |
158 | # define krb5_auth_con_getrcache kssl_krb5_auth_con_getrcache | |
159 | # define krb5_get_server_rcache kssl_krb5_get_server_rcache | |
2a1ef754 | 160 | |
f9b3bff6 RL |
161 | /* Prototypes for built in stubs */ |
162 | void kssl_krb5_free_data_contents(krb5_context, krb5_data *); | |
0f113f3e | 163 | void kssl_krb5_free_principal(krb5_context, krb5_principal); |
f9b3bff6 | 164 | krb5_error_code kssl_krb5_kt_resolve(krb5_context, |
0f113f3e MC |
165 | krb5_const char *, krb5_keytab *); |
166 | krb5_error_code kssl_krb5_kt_default(krb5_context, krb5_keytab *); | |
f9b3bff6 | 167 | krb5_error_code kssl_krb5_free_ticket(krb5_context, krb5_ticket *); |
0f113f3e | 168 | krb5_error_code kssl_krb5_rd_req(krb5_context, krb5_auth_context *, |
f9b3bff6 | 169 | krb5_const krb5_data *, |
0f113f3e MC |
170 | krb5_const_principal, krb5_keytab, |
171 | krb5_flags *, krb5_ticket **); | |
2a1ef754 RL |
172 | |
173 | krb5_boolean kssl_krb5_principal_compare(krb5_context, krb5_const_principal, | |
174 | krb5_const_principal); | |
f9b3bff6 | 175 | krb5_error_code kssl_krb5_mk_req_extended(krb5_context, |
0f113f3e | 176 | krb5_auth_context *, |
f9b3bff6 | 177 | krb5_const krb5_flags, |
0f113f3e MC |
178 | krb5_data *, |
179 | krb5_creds *, krb5_data *); | |
f9b3bff6 RL |
180 | krb5_error_code kssl_krb5_init_context(krb5_context *); |
181 | void kssl_krb5_free_context(krb5_context); | |
0f113f3e | 182 | krb5_error_code kssl_krb5_cc_default(krb5_context, krb5_ccache *); |
f9b3bff6 | 183 | krb5_error_code kssl_krb5_sname_to_principal(krb5_context, |
0f113f3e MC |
184 | krb5_const char *, |
185 | krb5_const char *, | |
186 | krb5_int32, krb5_principal *); | |
f9b3bff6 RL |
187 | krb5_error_code kssl_krb5_get_credentials(krb5_context, |
188 | krb5_const krb5_flags, | |
189 | krb5_ccache, | |
0f113f3e MC |
190 | krb5_creds *, krb5_creds * *); |
191 | krb5_error_code kssl_krb5_auth_con_init(krb5_context, krb5_auth_context *); | |
192 | krb5_error_code kssl_krb5_cc_get_principal(krb5_context context, | |
f9b3bff6 RL |
193 | krb5_ccache cache, |
194 | krb5_principal *principal); | |
0f113f3e MC |
195 | krb5_error_code kssl_krb5_auth_con_free(krb5_context, krb5_auth_context); |
196 | size_t kssl_krb5_checksum_size(krb5_context context, krb5_cksumtype ctype); | |
8de83bf8 | 197 | krb5_boolean kssl_valid_cksumtype(krb5_cksumtype ctype); |
0f113f3e MC |
198 | krb5_error_code krb5_kt_free_entry(krb5_context, krb5_keytab_entry FAR *); |
199 | krb5_error_code kssl_krb5_auth_con_setrcache(krb5_context, | |
200 | krb5_auth_context, krb5_rcache); | |
201 | krb5_error_code kssl_krb5_get_server_rcache(krb5_context, | |
a5224c34 RL |
202 | krb5_const krb5_data *, |
203 | krb5_rcache *); | |
0f113f3e | 204 | krb5_error_code kssl_krb5_auth_con_getrcache(krb5_context, |
a5224c34 RL |
205 | krb5_auth_context, |
206 | krb5_rcache *); | |
f9b3bff6 RL |
207 | |
208 | /* Function pointers (almost all Kerberos functions are _stdcall) */ | |
0f113f3e MC |
209 | static void (_stdcall *p_krb5_free_data_contents) (krb5_context, krb5_data *) |
210 | = NULL; | |
211 | static void (_stdcall *p_krb5_free_principal) (krb5_context, krb5_principal) | |
212 | = NULL; | |
2a1ef754 | 213 | static krb5_error_code(_stdcall *p_krb5_kt_resolve) |
0f113f3e MC |
214 | (krb5_context, krb5_const char *, krb5_keytab *) = NULL; |
215 | static krb5_error_code(_stdcall *p_krb5_kt_default) (krb5_context, | |
216 | krb5_keytab *) = NULL; | |
217 | static krb5_error_code(_stdcall *p_krb5_free_ticket) (krb5_context, | |
218 | krb5_ticket *) = NULL; | |
219 | static krb5_error_code(_stdcall *p_krb5_rd_req) (krb5_context, | |
220 | krb5_auth_context *, | |
f9b3bff6 | 221 | krb5_const krb5_data *, |
0f113f3e | 222 | krb5_const_principal, |
f9b3bff6 | 223 | krb5_keytab, krb5_flags *, |
0f113f3e MC |
224 | krb5_ticket **) = NULL; |
225 | static krb5_error_code(_stdcall *p_krb5_mk_req_extended) | |
226 | (krb5_context, krb5_auth_context *, | |
227 | krb5_const krb5_flags, krb5_data *, krb5_creds *, krb5_data *) = NULL; | |
228 | static krb5_error_code(_stdcall *p_krb5_init_context) (krb5_context *) = NULL; | |
229 | static void (_stdcall *p_krb5_free_context) (krb5_context) = NULL; | |
230 | static krb5_error_code(_stdcall *p_krb5_cc_default) (krb5_context, | |
231 | krb5_ccache *) = NULL; | |
232 | static krb5_error_code(_stdcall *p_krb5_sname_to_principal) | |
233 | (krb5_context, krb5_const char *, krb5_const char *, | |
234 | krb5_int32, krb5_principal *) = NULL; | |
235 | static krb5_error_code(_stdcall *p_krb5_get_credentials) | |
236 | (krb5_context, krb5_const krb5_flags, krb5_ccache, | |
237 | krb5_creds *, krb5_creds **) = NULL; | |
238 | static krb5_error_code(_stdcall *p_krb5_auth_con_init) | |
239 | (krb5_context, krb5_auth_context *) = NULL; | |
240 | static krb5_error_code(_stdcall *p_krb5_cc_get_principal) | |
241 | (krb5_context context, krb5_ccache cache, krb5_principal *principal) = NULL; | |
242 | static krb5_error_code(_stdcall *p_krb5_auth_con_free) | |
243 | (krb5_context, krb5_auth_context) = NULL; | |
244 | static krb5_error_code(_stdcall *p_krb5_decrypt_tkt_part) | |
245 | (krb5_context, krb5_const krb5_keyblock *, krb5_ticket *) = NULL; | |
246 | static krb5_error_code(_stdcall *p_krb5_timeofday) | |
247 | (krb5_context context, krb5_int32 *timeret) = NULL; | |
248 | static krb5_error_code(_stdcall *p_krb5_rc_default) | |
249 | (krb5_context context, krb5_rcache *rc) = NULL; | |
250 | static krb5_error_code(_stdcall *p_krb5_rc_initialize) | |
251 | (krb5_context context, krb5_rcache rc, krb5_deltat lifespan) = NULL; | |
252 | static krb5_error_code(_stdcall *p_krb5_rc_get_lifespan) | |
253 | (krb5_context context, krb5_rcache rc, krb5_deltat *lifespan) = NULL; | |
254 | static krb5_error_code(_stdcall *p_krb5_rc_destroy) | |
255 | (krb5_context context, krb5_rcache rc) = NULL; | |
256 | static krb5_boolean(_stdcall *p_krb5_principal_compare) | |
257 | (krb5_context, krb5_const_principal, krb5_const_principal) = NULL; | |
258 | static size_t (_stdcall *p_krb5_checksum_size) (krb5_context context, | |
259 | krb5_cksumtype ctype) = NULL; | |
260 | static krb5_boolean(_stdcall *p_valid_cksumtype) (krb5_cksumtype ctype) = | |
261 | NULL; | |
262 | static krb5_error_code(_stdcall *p_krb5_kt_free_entry) | |
263 | (krb5_context, krb5_keytab_entry *) = NULL; | |
264 | static krb5_error_code(_stdcall *p_krb5_auth_con_setrcache) (krb5_context, | |
265 | krb5_auth_context, | |
266 | krb5_rcache) = | |
267 | NULL; | |
268 | static krb5_error_code(_stdcall *p_krb5_get_server_rcache) (krb5_context, | |
269 | krb5_const | |
270 | krb5_data *, | |
271 | krb5_rcache *) = | |
272 | NULL; | |
273 | static krb5_error_code(*p_krb5_auth_con_getrcache) (krb5_context, | |
274 | krb5_auth_context, | |
275 | krb5_rcache *) = NULL; | |
276 | static krb5_error_code(_stdcall *p_krb5_kt_close) (krb5_context context, | |
277 | krb5_keytab keytab) = NULL; | |
278 | static krb5_error_code(_stdcall *p_krb5_kt_get_entry) (krb5_context context, | |
279 | krb5_keytab keytab, | |
280 | krb5_const_principal | |
281 | principal, | |
282 | krb5_kvno vno, | |
283 | krb5_enctype enctype, | |
284 | krb5_keytab_entry | |
285 | *entry) = NULL; | |
f9b3bff6 RL |
286 | static int krb5_loaded = 0; /* only attempt to initialize func ptrs once */ |
287 | ||
288 | /* Function to Load the Kerberos 5 DLL and initialize function pointers */ | |
0f113f3e MC |
289 | void load_krb5_dll(void) |
290 | { | |
291 | HANDLE hKRB5_32; | |
292 | ||
293 | krb5_loaded++; | |
294 | hKRB5_32 = LoadLibrary(TEXT("KRB5_32")); | |
295 | if (!hKRB5_32) | |
296 | return; | |
297 | ||
298 | (FARPROC) p_krb5_free_data_contents = | |
299 | GetProcAddress(hKRB5_32, "krb5_free_data_contents"); | |
300 | (FARPROC) p_krb5_free_context = | |
301 | GetProcAddress(hKRB5_32, "krb5_free_context"); | |
302 | (FARPROC) p_krb5_auth_con_free = | |
303 | GetProcAddress(hKRB5_32, "krb5_auth_con_free"); | |
304 | (FARPROC) p_krb5_free_principal = | |
305 | GetProcAddress(hKRB5_32, "krb5_free_principal"); | |
306 | (FARPROC) p_krb5_mk_req_extended = | |
307 | GetProcAddress(hKRB5_32, "krb5_mk_req_extended"); | |
308 | (FARPROC) p_krb5_get_credentials = | |
309 | GetProcAddress(hKRB5_32, "krb5_get_credentials"); | |
310 | (FARPROC) p_krb5_cc_get_principal = | |
311 | GetProcAddress(hKRB5_32, "krb5_cc_get_principal"); | |
312 | (FARPROC) p_krb5_cc_default = GetProcAddress(hKRB5_32, "krb5_cc_default"); | |
313 | (FARPROC) p_krb5_sname_to_principal = | |
314 | GetProcAddress(hKRB5_32, "krb5_sname_to_principal"); | |
315 | (FARPROC) p_krb5_init_context = | |
316 | GetProcAddress(hKRB5_32, "krb5_init_context"); | |
317 | (FARPROC) p_krb5_free_ticket = | |
318 | GetProcAddress(hKRB5_32, "krb5_free_ticket"); | |
319 | (FARPROC) p_krb5_rd_req = GetProcAddress(hKRB5_32, "krb5_rd_req"); | |
320 | (FARPROC) p_krb5_principal_compare = | |
321 | GetProcAddress(hKRB5_32, "krb5_principal_compare"); | |
322 | (FARPROC) p_krb5_decrypt_tkt_part = | |
323 | GetProcAddress(hKRB5_32, "krb5_decrypt_tkt_part"); | |
324 | (FARPROC) p_krb5_timeofday = GetProcAddress(hKRB5_32, "krb5_timeofday"); | |
325 | (FARPROC) p_krb5_rc_default = GetProcAddress(hKRB5_32, "krb5_rc_default"); | |
326 | (FARPROC) p_krb5_rc_initialize = | |
327 | GetProcAddress(hKRB5_32, "krb5_rc_initialize"); | |
328 | (FARPROC) p_krb5_rc_get_lifespan = | |
329 | GetProcAddress(hKRB5_32, "krb5_rc_get_lifespan"); | |
330 | (FARPROC) p_krb5_rc_destroy = GetProcAddress(hKRB5_32, "krb5_rc_destroy"); | |
331 | (FARPROC) p_krb5_kt_default = GetProcAddress(hKRB5_32, "krb5_kt_default"); | |
332 | (FARPROC) p_krb5_kt_resolve = GetProcAddress(hKRB5_32, "krb5_kt_resolve"); | |
333 | (FARPROC) p_krb5_auth_con_init = | |
334 | GetProcAddress(hKRB5_32, "krb5_auth_con_init"); | |
335 | (FARPROC) p_valid_cksumtype = GetProcAddress(hKRB5_32, "valid_cksumtype"); | |
336 | (FARPROC) p_krb5_checksum_size = | |
337 | GetProcAddress(hKRB5_32, "krb5_checksum_size"); | |
338 | (FARPROC) p_krb5_kt_free_entry = | |
339 | GetProcAddress(hKRB5_32, "krb5_kt_free_entry"); | |
340 | (FARPROC) p_krb5_auth_con_setrcache = | |
341 | GetProcAddress(hKRB5_32, "krb5_auth_con_setrcache"); | |
342 | (FARPROC) p_krb5_get_server_rcache = | |
343 | GetProcAddress(hKRB5_32, "krb5_get_server_rcache"); | |
344 | (FARPROC) p_krb5_auth_con_getrcache = | |
345 | GetProcAddress(hKRB5_32, "krb5_auth_con_getrcache"); | |
346 | (FARPROC) p_krb5_kt_close = GetProcAddress(hKRB5_32, "krb5_kt_close"); | |
347 | (FARPROC) p_krb5_kt_get_entry = | |
348 | GetProcAddress(hKRB5_32, "krb5_kt_get_entry"); | |
349 | } | |
f9b3bff6 RL |
350 | |
351 | /* Stubs for each function to be dynamicly loaded */ | |
0f113f3e MC |
352 | void kssl_krb5_free_data_contents(krb5_context CO, krb5_data *data) |
353 | { | |
354 | if (!krb5_loaded) | |
355 | load_krb5_dll(); | |
f9b3bff6 | 356 | |
0f113f3e MC |
357 | if (p_krb5_free_data_contents) |
358 | p_krb5_free_data_contents(CO, data); | |
359 | } | |
f9b3bff6 RL |
360 | |
361 | krb5_error_code | |
0f113f3e MC |
362 | kssl_krb5_mk_req_extended(krb5_context CO, |
363 | krb5_auth_context *pACO, | |
f9b3bff6 | 364 | krb5_const krb5_flags F, |
0f113f3e MC |
365 | krb5_data *pD1, krb5_creds *pC, krb5_data *pD2) |
366 | { | |
367 | if (!krb5_loaded) | |
368 | load_krb5_dll(); | |
369 | ||
370 | if (p_krb5_mk_req_extended) | |
371 | return (p_krb5_mk_req_extended(CO, pACO, F, pD1, pC, pD2)); | |
372 | else | |
373 | return KRB5KRB_ERR_GENERIC; | |
374 | } | |
375 | ||
f9b3bff6 | 376 | krb5_error_code |
0f113f3e MC |
377 | kssl_krb5_auth_con_init(krb5_context CO, krb5_auth_context *pACO) |
378 | { | |
379 | if (!krb5_loaded) | |
380 | load_krb5_dll(); | |
381 | ||
382 | if (p_krb5_auth_con_init) | |
383 | return (p_krb5_auth_con_init(CO, pACO)); | |
384 | else | |
385 | return KRB5KRB_ERR_GENERIC; | |
386 | } | |
387 | ||
f9b3bff6 | 388 | krb5_error_code |
0f113f3e MC |
389 | kssl_krb5_auth_con_free(krb5_context CO, krb5_auth_context ACO) |
390 | { | |
391 | if (!krb5_loaded) | |
392 | load_krb5_dll(); | |
393 | ||
394 | if (p_krb5_auth_con_free) | |
395 | return (p_krb5_auth_con_free(CO, ACO)); | |
396 | else | |
397 | return KRB5KRB_ERR_GENERIC; | |
398 | } | |
399 | ||
f9b3bff6 RL |
400 | krb5_error_code |
401 | kssl_krb5_get_credentials(krb5_context CO, | |
0f113f3e MC |
402 | krb5_const krb5_flags F, |
403 | krb5_ccache CC, krb5_creds *pCR, krb5_creds **ppCR) | |
404 | { | |
405 | if (!krb5_loaded) | |
406 | load_krb5_dll(); | |
407 | ||
408 | if (p_krb5_get_credentials) | |
409 | return (p_krb5_get_credentials(CO, F, CC, pCR, ppCR)); | |
410 | else | |
411 | return KRB5KRB_ERR_GENERIC; | |
412 | } | |
413 | ||
f9b3bff6 RL |
414 | krb5_error_code |
415 | kssl_krb5_sname_to_principal(krb5_context CO, | |
0f113f3e MC |
416 | krb5_const char *pC1, |
417 | krb5_const char *pC2, | |
418 | krb5_int32 I, krb5_principal *pPR) | |
419 | { | |
420 | if (!krb5_loaded) | |
421 | load_krb5_dll(); | |
f9b3bff6 | 422 | |
0f113f3e MC |
423 | if (p_krb5_sname_to_principal) |
424 | return (p_krb5_sname_to_principal(CO, pC1, pC2, I, pPR)); | |
425 | else | |
426 | return KRB5KRB_ERR_GENERIC; | |
427 | } | |
f9b3bff6 | 428 | |
0f113f3e MC |
429 | krb5_error_code kssl_krb5_cc_default(krb5_context CO, krb5_ccache *pCC) |
430 | { | |
431 | if (!krb5_loaded) | |
432 | load_krb5_dll(); | |
f9b3bff6 | 433 | |
0f113f3e MC |
434 | if (p_krb5_cc_default) |
435 | return (p_krb5_cc_default(CO, pCC)); | |
436 | else | |
437 | return KRB5KRB_ERR_GENERIC; | |
438 | } | |
f9b3bff6 | 439 | |
0f113f3e MC |
440 | krb5_error_code kssl_krb5_init_context(krb5_context *pCO) |
441 | { | |
442 | if (!krb5_loaded) | |
443 | load_krb5_dll(); | |
444 | ||
445 | if (p_krb5_init_context) | |
446 | return (p_krb5_init_context(pCO)); | |
447 | else | |
448 | return KRB5KRB_ERR_GENERIC; | |
449 | } | |
450 | ||
451 | void kssl_krb5_free_context(krb5_context CO) | |
452 | { | |
453 | if (!krb5_loaded) | |
454 | load_krb5_dll(); | |
455 | ||
456 | if (p_krb5_free_context) | |
457 | p_krb5_free_context(CO); | |
458 | } | |
459 | ||
460 | void kssl_krb5_free_principal(krb5_context c, krb5_principal p) | |
461 | { | |
462 | if (!krb5_loaded) | |
463 | load_krb5_dll(); | |
464 | ||
465 | if (p_krb5_free_principal) | |
466 | p_krb5_free_principal(c, p); | |
467 | } | |
f9b3bff6 RL |
468 | |
469 | krb5_error_code | |
0f113f3e MC |
470 | kssl_krb5_kt_resolve(krb5_context con, krb5_const char *sz, krb5_keytab *kt) |
471 | { | |
472 | if (!krb5_loaded) | |
473 | load_krb5_dll(); | |
474 | ||
475 | if (p_krb5_kt_resolve) | |
476 | return (p_krb5_kt_resolve(con, sz, kt)); | |
477 | else | |
478 | return KRB5KRB_ERR_GENERIC; | |
479 | } | |
480 | ||
481 | krb5_error_code kssl_krb5_kt_default(krb5_context con, krb5_keytab *kt) | |
482 | { | |
483 | if (!krb5_loaded) | |
484 | load_krb5_dll(); | |
485 | ||
486 | if (p_krb5_kt_default) | |
487 | return (p_krb5_kt_default(con, kt)); | |
488 | else | |
489 | return KRB5KRB_ERR_GENERIC; | |
490 | } | |
491 | ||
492 | krb5_error_code kssl_krb5_free_ticket(krb5_context con, krb5_ticket *kt) | |
493 | { | |
494 | if (!krb5_loaded) | |
495 | load_krb5_dll(); | |
496 | ||
497 | if (p_krb5_free_ticket) | |
498 | return (p_krb5_free_ticket(con, kt)); | |
499 | else | |
500 | return KRB5KRB_ERR_GENERIC; | |
501 | } | |
f9b3bff6 RL |
502 | |
503 | krb5_error_code | |
0f113f3e MC |
504 | kssl_krb5_rd_req(krb5_context con, krb5_auth_context *pacon, |
505 | krb5_const krb5_data *data, | |
506 | krb5_const_principal princ, krb5_keytab keytab, | |
507 | krb5_flags *flags, krb5_ticket **pptkt) | |
508 | { | |
509 | if (!krb5_loaded) | |
510 | load_krb5_dll(); | |
511 | ||
512 | if (p_krb5_rd_req) | |
513 | return (p_krb5_rd_req(con, pacon, data, princ, keytab, flags, pptkt)); | |
514 | else | |
515 | return KRB5KRB_ERR_GENERIC; | |
516 | } | |
f9b3bff6 | 517 | |
2a1ef754 RL |
518 | krb5_boolean |
519 | krb5_principal_compare(krb5_context con, krb5_const_principal princ1, | |
0f113f3e MC |
520 | krb5_const_principal princ2) |
521 | { | |
522 | if (!krb5_loaded) | |
523 | load_krb5_dll(); | |
2a1ef754 | 524 | |
0f113f3e MC |
525 | if (p_krb5_principal_compare) |
526 | return (p_krb5_principal_compare(con, princ1, princ2)); | |
527 | else | |
528 | return KRB5KRB_ERR_GENERIC; | |
529 | } | |
2a1ef754 RL |
530 | |
531 | krb5_error_code | |
532 | krb5_decrypt_tkt_part(krb5_context con, krb5_const krb5_keyblock *keys, | |
0f113f3e MC |
533 | krb5_ticket *ticket) |
534 | { | |
535 | if (!krb5_loaded) | |
536 | load_krb5_dll(); | |
2a1ef754 | 537 | |
0f113f3e MC |
538 | if (p_krb5_decrypt_tkt_part) |
539 | return (p_krb5_decrypt_tkt_part(con, keys, ticket)); | |
540 | else | |
541 | return KRB5KRB_ERR_GENERIC; | |
542 | } | |
2a1ef754 | 543 | |
0f113f3e MC |
544 | krb5_error_code krb5_timeofday(krb5_context con, krb5_int32 *timeret) |
545 | { | |
546 | if (!krb5_loaded) | |
547 | load_krb5_dll(); | |
2a1ef754 | 548 | |
0f113f3e MC |
549 | if (p_krb5_timeofday) |
550 | return (p_krb5_timeofday(con, timeret)); | |
551 | else | |
552 | return KRB5KRB_ERR_GENERIC; | |
553 | } | |
2a1ef754 | 554 | |
0f113f3e MC |
555 | krb5_error_code krb5_rc_default(krb5_context con, krb5_rcache *rc) |
556 | { | |
557 | if (!krb5_loaded) | |
558 | load_krb5_dll(); | |
2a1ef754 | 559 | |
0f113f3e MC |
560 | if (p_krb5_rc_default) |
561 | return (p_krb5_rc_default(con, rc)); | |
562 | else | |
563 | return KRB5KRB_ERR_GENERIC; | |
564 | } | |
2a1ef754 RL |
565 | |
566 | krb5_error_code | |
567 | krb5_rc_initialize(krb5_context con, krb5_rcache rc, krb5_deltat lifespan) | |
0f113f3e MC |
568 | { |
569 | if (!krb5_loaded) | |
570 | load_krb5_dll(); | |
2a1ef754 | 571 | |
0f113f3e MC |
572 | if (p_krb5_rc_initialize) |
573 | return (p_krb5_rc_initialize(con, rc, lifespan)); | |
574 | else | |
575 | return KRB5KRB_ERR_GENERIC; | |
576 | } | |
2a1ef754 RL |
577 | |
578 | krb5_error_code | |
579 | krb5_rc_get_lifespan(krb5_context con, krb5_rcache rc, krb5_deltat *lifespanp) | |
0f113f3e MC |
580 | { |
581 | if (!krb5_loaded) | |
582 | load_krb5_dll(); | |
2a1ef754 | 583 | |
0f113f3e MC |
584 | if (p_krb5_rc_get_lifespan) |
585 | return (p_krb5_rc_get_lifespan(con, rc, lifespanp)); | |
586 | else | |
587 | return KRB5KRB_ERR_GENERIC; | |
588 | } | |
2a1ef754 | 589 | |
0f113f3e MC |
590 | krb5_error_code krb5_rc_destroy(krb5_context con, krb5_rcache rc) |
591 | { | |
592 | if (!krb5_loaded) | |
593 | load_krb5_dll(); | |
8de83bf8 | 594 | |
0f113f3e MC |
595 | if (p_krb5_rc_destroy) |
596 | return (p_krb5_rc_destroy(con, rc)); | |
597 | else | |
598 | return KRB5KRB_ERR_GENERIC; | |
599 | } | |
8de83bf8 | 600 | |
0f113f3e MC |
601 | size_t krb5_checksum_size(krb5_context context, krb5_cksumtype ctype) |
602 | { | |
603 | if (!krb5_loaded) | |
604 | load_krb5_dll(); | |
8de83bf8 | 605 | |
0f113f3e MC |
606 | if (p_krb5_checksum_size) |
607 | return (p_krb5_checksum_size(context, ctype)); | |
608 | else | |
609 | return KRB5KRB_ERR_GENERIC; | |
610 | } | |
8de83bf8 | 611 | |
0f113f3e MC |
612 | krb5_boolean valid_cksumtype(krb5_cksumtype ctype) |
613 | { | |
614 | if (!krb5_loaded) | |
615 | load_krb5_dll(); | |
616 | ||
617 | if (p_valid_cksumtype) | |
618 | return (p_valid_cksumtype(ctype)); | |
619 | else | |
620 | return KRB5KRB_ERR_GENERIC; | |
621 | } | |
622 | ||
623 | krb5_error_code krb5_kt_free_entry(krb5_context con, krb5_keytab_entry *entry) | |
624 | { | |
625 | if (!krb5_loaded) | |
626 | load_krb5_dll(); | |
627 | ||
628 | if (p_krb5_kt_free_entry) | |
629 | return (p_krb5_kt_free_entry(con, entry)); | |
630 | else | |
631 | return KRB5KRB_ERR_GENERIC; | |
632 | } | |
8de83bf8 | 633 | |
f9b3bff6 | 634 | /* Structure definitions */ |
0f113f3e MC |
635 | # ifndef NO_DEF_KRB5_CCACHE |
636 | # ifndef krb5_x | |
637 | # define krb5_x(ptr,args) ((ptr)?((*(ptr)) args):(abort(),1)) | |
638 | # define krb5_xc(ptr,args) ((ptr)?((*(ptr)) args):(abort(),(char*)0)) | |
639 | # endif | |
640 | ||
641 | typedef krb5_pointer krb5_cc_cursor; /* cursor for sequential lookup */ | |
642 | ||
643 | typedef struct _krb5_ccache { | |
644 | krb5_magic magic; | |
645 | struct _krb5_cc_ops FAR *ops; | |
646 | krb5_pointer data; | |
647 | } *krb5_ccache; | |
648 | ||
649 | typedef struct _krb5_cc_ops { | |
650 | krb5_magic magic; | |
651 | char *prefix; | |
652 | char *(KRB5_CALLCONV *get_name) | |
653 | (krb5_context, krb5_ccache); | |
654 | krb5_error_code(KRB5_CALLCONV *resolve) | |
655 | (krb5_context, krb5_ccache *, const char *); | |
656 | krb5_error_code(KRB5_CALLCONV *gen_new) | |
657 | (krb5_context, krb5_ccache *); | |
658 | krb5_error_code(KRB5_CALLCONV *init) | |
659 | (krb5_context, krb5_ccache, krb5_principal); | |
660 | krb5_error_code(KRB5_CALLCONV *destroy) | |
661 | (krb5_context, krb5_ccache); | |
662 | krb5_error_code(KRB5_CALLCONV *close) | |
663 | (krb5_context, krb5_ccache); | |
664 | krb5_error_code(KRB5_CALLCONV *store) | |
665 | (krb5_context, krb5_ccache, krb5_creds *); | |
666 | krb5_error_code(KRB5_CALLCONV *retrieve) | |
667 | (krb5_context, krb5_ccache, krb5_flags, krb5_creds *, krb5_creds *); | |
668 | krb5_error_code(KRB5_CALLCONV *get_princ) | |
669 | (krb5_context, krb5_ccache, krb5_principal *); | |
670 | krb5_error_code(KRB5_CALLCONV *get_first) | |
671 | (krb5_context, krb5_ccache, krb5_cc_cursor *); | |
672 | krb5_error_code(KRB5_CALLCONV *get_next) | |
673 | (krb5_context, krb5_ccache, krb5_cc_cursor *, krb5_creds *); | |
674 | krb5_error_code(KRB5_CALLCONV *end_get) | |
675 | (krb5_context, krb5_ccache, krb5_cc_cursor *); | |
676 | krb5_error_code(KRB5_CALLCONV *remove_cred) | |
677 | (krb5_context, krb5_ccache, krb5_flags, krb5_creds *); | |
678 | krb5_error_code(KRB5_CALLCONV *set_flags) | |
679 | (krb5_context, krb5_ccache, krb5_flags); | |
680 | } krb5_cc_ops; | |
681 | # endif /* NO_DEF_KRB5_CCACHE */ | |
682 | ||
683 | krb5_error_code | |
684 | kssl_krb5_cc_get_principal | |
685 | (krb5_context context, krb5_ccache cache, krb5_principal *principal) { | |
686 | if (p_krb5_cc_get_principal) | |
687 | return (p_krb5_cc_get_principal(context, cache, principal)); | |
688 | else | |
689 | return (krb5_x((cache)->ops->get_princ, (context, cache, principal))); | |
690 | } | |
a5224c34 RL |
691 | |
692 | krb5_error_code | |
693 | kssl_krb5_auth_con_setrcache(krb5_context con, krb5_auth_context acon, | |
694 | krb5_rcache rcache) | |
0f113f3e MC |
695 | { |
696 | if (p_krb5_auth_con_setrcache) | |
697 | return (p_krb5_auth_con_setrcache(con, acon, rcache)); | |
698 | else | |
699 | return KRB5KRB_ERR_GENERIC; | |
700 | } | |
a5224c34 RL |
701 | |
702 | krb5_error_code | |
0f113f3e MC |
703 | kssl_krb5_get_server_rcache(krb5_context con, krb5_const krb5_data *data, |
704 | krb5_rcache *rcache) | |
705 | { | |
706 | if (p_krb5_get_server_rcache) | |
707 | return (p_krb5_get_server_rcache(con, data, rcache)); | |
708 | else | |
709 | return KRB5KRB_ERR_GENERIC; | |
710 | } | |
a5224c34 RL |
711 | |
712 | krb5_error_code | |
713 | kssl_krb5_auth_con_getrcache(krb5_context con, krb5_auth_context acon, | |
0f113f3e MC |
714 | krb5_rcache *prcache) |
715 | { | |
716 | if (p_krb5_auth_con_getrcache) | |
717 | return (p_krb5_auth_con_getrcache(con, acon, prcache)); | |
718 | else | |
719 | return KRB5KRB_ERR_GENERIC; | |
720 | } | |
721 | ||
722 | krb5_error_code kssl_krb5_kt_close(krb5_context context, krb5_keytab keytab) | |
723 | { | |
724 | if (p_krb5_kt_close) | |
725 | return (p_krb5_kt_close(context, keytab)); | |
726 | else | |
727 | return KRB5KRB_ERR_GENERIC; | |
728 | } | |
47ff5c62 BM |
729 | |
730 | krb5_error_code | |
731 | kssl_krb5_kt_get_entry(krb5_context context, krb5_keytab keytab, | |
732 | krb5_const_principal principal, krb5_kvno vno, | |
733 | krb5_enctype enctype, krb5_keytab_entry *entry) | |
15780a1e | 734 | { |
0f113f3e MC |
735 | if (p_krb5_kt_get_entry) |
736 | return (p_krb5_kt_get_entry | |
737 | (context, keytab, principal, vno, enctype, entry)); | |
738 | else | |
739 | return KRB5KRB_ERR_GENERIC; | |
15780a1e | 740 | } |
0f113f3e MC |
741 | # endif /* OPENSSL_SYS_WINDOWS || OPENSSL_SYS_WIN32 */ |
742 | ||
743 | /* | |
744 | * memory allocation functions for non-temporary storage (e.g. stuff that | |
745 | * gets saved into the kssl context) | |
746 | */ | |
747 | static void *kssl_calloc(size_t nmemb, size_t size) | |
748 | { | |
749 | void *p; | |
15780a1e | 750 | |
0f113f3e MC |
751 | p = OPENSSL_malloc(nmemb * size); |
752 | if (p) { | |
753 | memset(p, 0, nmemb * size); | |
754 | } | |
755 | return p; | |
756 | } | |
15780a1e | 757 | |
0f113f3e MC |
758 | # define kssl_malloc(size) OPENSSL_malloc((size)) |
759 | # define kssl_realloc(ptr, size) OPENSSL_realloc(ptr, size) | |
760 | # define kssl_free(ptr) OPENSSL_free((ptr)) | |
15780a1e | 761 | |
43fcc1b0 RL |
762 | char |
763 | *kstring(char *string) | |
0f113f3e MC |
764 | { |
765 | static char *null = "[NULL]"; | |
43fcc1b0 | 766 | |
0f113f3e MC |
767 | return ((string == NULL) ? null : string); |
768 | } | |
43fcc1b0 | 769 | |
0f113f3e MC |
770 | /* |
771 | * Given KRB5 enctype (basically DES or 3DES), return closest match openssl | |
772 | * EVP_ encryption algorithm. Return NULL for unknown or problematic | |
773 | * (krb5_dk_encrypt) enctypes. Assume ENCTYPE_*_RAW (krb5_raw_encrypt) are | |
774 | * OK. | |
1d97c843 | 775 | */ |
0f113f3e MC |
776 | const EVP_CIPHER *kssl_map_enc(krb5_enctype enctype) |
777 | { | |
778 | switch (enctype) { | |
779 | case ENCTYPE_DES_HMAC_SHA1: /* EVP_des_cbc(); */ | |
780 | case ENCTYPE_DES_CBC_CRC: | |
781 | case ENCTYPE_DES_CBC_MD4: | |
782 | case ENCTYPE_DES_CBC_MD5: | |
783 | case ENCTYPE_DES_CBC_RAW: | |
784 | return EVP_des_cbc(); | |
785 | break; | |
786 | case ENCTYPE_DES3_CBC_SHA1: /* EVP_des_ede3_cbc(); */ | |
787 | case ENCTYPE_DES3_CBC_SHA: | |
788 | case ENCTYPE_DES3_CBC_RAW: | |
789 | return EVP_des_ede3_cbc(); | |
790 | break; | |
791 | default: | |
792 | return NULL; | |
793 | break; | |
794 | } | |
795 | } | |
796 | ||
797 | /* | |
798 | * Return true:1 if p "looks like" the start of the real authenticator | |
799 | * described in kssl_skip_confound() below. The ASN.1 pattern is "62 xx 30 | |
800 | * yy" (APPLICATION-2, SEQUENCE), where xx-yy =~ 2, and xx and yy are | |
801 | * possibly multi-byte length fields. | |
1d97c843 | 802 | */ |
0f113f3e MC |
803 | static int kssl_test_confound(unsigned char *p) |
804 | { | |
805 | int len = 2; | |
806 | int xx = 0, yy = 0; | |
807 | ||
808 | if (*p++ != 0x62) | |
809 | return 0; | |
810 | if (*p > 0x82) | |
811 | return 0; | |
812 | switch (*p) { | |
813 | case 0x82: | |
814 | p++; | |
815 | xx = (*p++ << 8); | |
816 | xx += *p++; | |
817 | break; | |
818 | case 0x81: | |
819 | p++; | |
820 | xx = *p++; | |
821 | break; | |
822 | case 0x80: | |
823 | return 0; | |
824 | default: | |
825 | xx = *p++; | |
826 | break; | |
827 | } | |
828 | if (*p++ != 0x30) | |
829 | return 0; | |
830 | if (*p > 0x82) | |
831 | return 0; | |
832 | switch (*p) { | |
833 | case 0x82: | |
834 | p++; | |
835 | len += 2; | |
836 | yy = (*p++ << 8); | |
837 | yy += *p++; | |
838 | break; | |
839 | case 0x81: | |
840 | p++; | |
841 | len++; | |
842 | yy = *p++; | |
843 | break; | |
844 | case 0x80: | |
845 | return 0; | |
846 | default: | |
847 | yy = *p++; | |
848 | break; | |
849 | } | |
850 | ||
851 | return (xx - len == yy) ? 1 : 0; | |
852 | } | |
853 | ||
854 | /* | |
855 | * Allocate, fill, and return cksumlens array of checksum lengths. This | |
856 | * array holds just the unique elements from the krb5_cksumarray[]. array[n] | |
857 | * == 0 signals end of data. The krb5_cksumarray[] was an internal variable | |
858 | * that has since been replaced by a more general method for storing the | |
859 | * data. It should not be used. Instead we use real API calls and make a | |
860 | * guess for what the highest assigned CKSUMTYPE_ constant is. As of 1.2.2 | |
861 | * it is 0x000c (CKSUMTYPE_HMAC_SHA1_DES3). So we will use 0x0010. | |
1d97c843 | 862 | */ |
0f113f3e MC |
863 | static size_t *populate_cksumlens(void) |
864 | { | |
865 | int i, j, n; | |
866 | static size_t *cklens = NULL; | |
867 | ||
868 | # ifdef KRB5_MIT_OLD11 | |
869 | n = krb5_max_cksum; | |
870 | # else | |
871 | n = 0x0010; | |
872 | # endif /* KRB5_MIT_OLD11 */ | |
873 | ||
874 | # ifdef KRB5CHECKAUTH | |
875 | if (!cklens && !(cklens = (size_t *)calloc(sizeof(int), n + 1))) | |
876 | return NULL; | |
877 | ||
878 | for (i = 0; i < n; i++) { | |
879 | if (!valid_cksumtype(i)) | |
880 | continue; /* array has holes */ | |
881 | for (j = 0; j < n; j++) { | |
882 | if (cklens[j] == 0) { | |
883 | cklens[j] = krb5_checksum_size(NULL, i); | |
884 | break; /* krb5 elem was new: add */ | |
885 | } | |
886 | if (cklens[j] == krb5_checksum_size(NULL, i)) { | |
887 | break; /* ignore duplicate elements */ | |
888 | } | |
889 | } | |
890 | } | |
891 | # endif /* KRB5CHECKAUTH */ | |
892 | ||
893 | return cklens; | |
894 | } | |
2a1ef754 | 895 | |
3a83462d | 896 | /*- |
0f113f3e MC |
897 | * Return pointer to start of real authenticator within authenticator, or |
898 | * return NULL on error. | |
899 | * Decrypted authenticator looks like this: | |
900 | * [0 or 8 byte confounder] [4-24 byte checksum] [real authent'r] | |
901 | * This hackery wouldn't be necessary if MIT KRB5 1.0.6 had the | |
902 | * krb5_auth_con_getcksumtype() function advertised in its krb5.h. | |
1d97c843 | 903 | */ |
0f113f3e MC |
904 | unsigned char *kssl_skip_confound(krb5_enctype etype, unsigned char *a) |
905 | { | |
906 | int i, conlen; | |
907 | size_t cklen; | |
908 | static size_t *cksumlens = NULL; | |
909 | unsigned char *test_auth; | |
910 | ||
911 | conlen = (etype) ? 8 : 0; | |
912 | ||
913 | if (!cksumlens && !(cksumlens = populate_cksumlens())) | |
914 | return NULL; | |
915 | for (i = 0; (cklen = cksumlens[i]) != 0; i++) { | |
916 | test_auth = a + conlen + cklen; | |
917 | if (kssl_test_confound(test_auth)) | |
918 | return test_auth; | |
919 | } | |
2a1ef754 | 920 | |
0f113f3e MC |
921 | return NULL; |
922 | } | |
2a1ef754 | 923 | |
0f113f3e MC |
924 | /* |
925 | * Set kssl_err error info when reason text is a simple string kssl_err = | |
926 | * struct { int reason; char text[KSSL_ERR_MAX+1]; } | |
927 | */ | |
928 | void kssl_err_set(KSSL_ERR *kssl_err, int reason, char *text) | |
929 | { | |
930 | if (kssl_err == NULL) | |
931 | return; | |
2a1ef754 | 932 | |
0f113f3e MC |
933 | kssl_err->reason = reason; |
934 | BIO_snprintf(kssl_err->text, KSSL_ERR_MAX, "%s", text); | |
935 | return; | |
936 | } | |
2a1ef754 | 937 | |
0f113f3e MC |
938 | /* |
939 | * Display contents of krb5_data struct, for debugging | |
1d97c843 | 940 | */ |
0f113f3e MC |
941 | void print_krb5_data(char *label, krb5_data *kdata) |
942 | { | |
943 | int i; | |
43fcc1b0 | 944 | |
0f113f3e MC |
945 | fprintf(stderr, "%s[%d] ", label, kdata->length); |
946 | for (i = 0; i < (int)kdata->length; i++) { | |
947 | if (0 && isprint((int)kdata->data[i])) | |
948 | fprintf(stderr, "%c ", kdata->data[i]); | |
949 | else | |
950 | fprintf(stderr, "%02x ", (unsigned char)kdata->data[i]); | |
951 | } | |
952 | fprintf(stderr, "\n"); | |
953 | } | |
43fcc1b0 | 954 | |
0f113f3e MC |
955 | /* |
956 | * Display contents of krb5_authdata struct, for debugging | |
957 | */ | |
958 | void print_krb5_authdata(char *label, krb5_authdata **adata) | |
959 | { | |
960 | if (adata == NULL) { | |
961 | fprintf(stderr, "%s, authdata==0\n", label); | |
962 | return; | |
963 | } | |
964 | fprintf(stderr, "%s [%p]\n", label, (void *)adata); | |
965 | # if 0 | |
966 | { | |
967 | int i; | |
968 | fprintf(stderr, "%s[at%d:%d] ", label, adata->ad_type, adata->length); | |
969 | for (i = 0; i < adata->length; i++) { | |
970 | fprintf(stderr, (isprint(adata->contents[i])) ? "%c " : "%02x", | |
971 | adata->contents[i]); | |
43fcc1b0 | 972 | } |
0f113f3e MC |
973 | fprintf(stderr, "\n"); |
974 | } | |
975 | # endif | |
976 | } | |
43fcc1b0 | 977 | |
0f113f3e MC |
978 | /* |
979 | * Display contents of krb5_keyblock struct, for debugging | |
980 | */ | |
981 | void print_krb5_keyblock(char *label, krb5_keyblock *keyblk) | |
982 | { | |
983 | int i; | |
43fcc1b0 | 984 | |
0f113f3e MC |
985 | if (keyblk == NULL) { |
986 | fprintf(stderr, "%s, keyblk==0\n", label); | |
987 | return; | |
988 | } | |
989 | # ifdef KRB5_HEIMDAL | |
990 | fprintf(stderr, "%s\n\t[et%d:%d]: ", label, keyblk->keytype, | |
991 | keyblk->keyvalue->length); | |
992 | for (i = 0; i < (int)keyblk->keyvalue->length; i++) { | |
993 | fprintf(stderr, "%02x", | |
994 | (unsigned char *)(keyblk->keyvalue->contents)[i]); | |
995 | } | |
996 | fprintf(stderr, "\n"); | |
997 | # else | |
998 | fprintf(stderr, "%s\n\t[et%d:%d]: ", label, keyblk->enctype, | |
999 | keyblk->length); | |
1000 | for (i = 0; i < (int)keyblk->length; i++) { | |
1001 | fprintf(stderr, "%02x", keyblk->contents[i]); | |
1002 | } | |
1003 | fprintf(stderr, "\n"); | |
1004 | # endif | |
1005 | } | |
43fcc1b0 | 1006 | |
0f113f3e MC |
1007 | /* |
1008 | * Display contents of krb5_principal_data struct, for debugging | |
1009 | * (krb5_principal is typedef'd == krb5_principal_data *) | |
1d97c843 | 1010 | */ |
0f113f3e MC |
1011 | static void print_krb5_princ(char *label, krb5_principal_data *princ) |
1012 | { | |
1013 | int i, ui, uj; | |
1014 | ||
1015 | fprintf(stderr, "%s principal Realm: ", label); | |
1016 | if (princ == NULL) | |
1017 | return; | |
1018 | for (ui = 0; ui < (int)princ->realm.length; ui++) | |
1019 | putchar(princ->realm.data[ui]); | |
1020 | fprintf(stderr, " (nametype %d) has %d strings:\n", princ->type, | |
1021 | princ->length); | |
1022 | for (i = 0; i < (int)princ->length; i++) { | |
1023 | fprintf(stderr, "\t%d [%d]: ", i, princ->data[i].length); | |
1024 | for (uj = 0; uj < (int)princ->data[i].length; uj++) { | |
1025 | putchar(princ->data[i].data[uj]); | |
2a1ef754 | 1026 | } |
0f113f3e MC |
1027 | fprintf(stderr, "\n"); |
1028 | } | |
1029 | return; | |
1030 | } | |
2a1ef754 | 1031 | |
0f113f3e MC |
1032 | /*- Given krb5 service (typically "kssl") and hostname in kssl_ctx, |
1033 | * Return encrypted Kerberos ticket for service @ hostname. | |
1034 | * If authenp is non-NULL, also return encrypted authenticator, | |
1035 | * whose data should be freed by caller. | |
1036 | * (Originally was: Create Kerberos AP_REQ message for SSL Client.) | |
1d97c843 | 1037 | * |
0f113f3e MC |
1038 | * 19990628 VRS Started; Returns Kerberos AP_REQ message. |
1039 | * 20010409 VRS Modified for RFC2712; Returns enc tkt. | |
1040 | * 20010606 VRS May also return optional authenticator. | |
1d97c843 | 1041 | */ |
0f113f3e MC |
1042 | krb5_error_code kssl_cget_tkt( /* UPDATE */ KSSL_CTX *kssl_ctx, |
1043 | /* | |
1044 | * OUT | |
1045 | */ krb5_data **enc_ticketp, | |
1046 | /* | |
1047 | * UPDATE | |
1048 | */ krb5_data *authenp, | |
1049 | /* | |
1050 | * OUT | |
1051 | */ KSSL_ERR *kssl_err) | |
1052 | { | |
1053 | krb5_error_code krb5rc = KRB5KRB_ERR_GENERIC; | |
1054 | krb5_context krb5context = NULL; | |
1055 | krb5_auth_context krb5auth_context = NULL; | |
1056 | krb5_ccache krb5ccdef = NULL; | |
1057 | krb5_creds krb5creds, *krb5credsp = NULL; | |
1058 | krb5_data krb5_app_req; | |
1059 | ||
1060 | kssl_err_set(kssl_err, 0, ""); | |
1061 | memset((char *)&krb5creds, 0, sizeof(krb5creds)); | |
1062 | ||
1063 | if (!kssl_ctx) { | |
1064 | kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, "No kssl_ctx defined.\n"); | |
1065 | goto err; | |
1066 | } else if (!kssl_ctx->service_host) { | |
1067 | kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, | |
1068 | "kssl_ctx service_host undefined.\n"); | |
1069 | goto err; | |
1070 | } | |
43fcc1b0 | 1071 | |
0f113f3e MC |
1072 | if ((krb5rc = krb5_init_context(&krb5context)) != 0) { |
1073 | BIO_snprintf(kssl_err->text, KSSL_ERR_MAX, | |
1074 | "krb5_init_context() fails: %d\n", krb5rc); | |
1075 | kssl_err->reason = SSL_R_KRB5_C_INIT; | |
1076 | goto err; | |
1077 | } | |
43fcc1b0 | 1078 | |
0f113f3e MC |
1079 | if ((krb5rc = krb5_sname_to_principal(krb5context, |
1080 | kssl_ctx->service_host, | |
1081 | (kssl_ctx->service_name) ? | |
1082 | kssl_ctx->service_name : KRB5SVC, | |
1083 | KRB5_NT_SRV_HST, | |
1084 | &krb5creds.server)) != 0) { | |
1085 | BIO_snprintf(kssl_err->text, KSSL_ERR_MAX, | |
1086 | "krb5_sname_to_principal() fails for %s/%s\n", | |
1087 | kssl_ctx->service_host, | |
1088 | (kssl_ctx-> | |
1089 | service_name) ? kssl_ctx->service_name : KRB5SVC); | |
1090 | kssl_err->reason = SSL_R_KRB5_C_INIT; | |
1091 | goto err; | |
1092 | } | |
1093 | ||
1094 | if ((krb5rc = krb5_cc_default(krb5context, &krb5ccdef)) != 0) { | |
1095 | kssl_err_set(kssl_err, SSL_R_KRB5_C_CC_PRINC, | |
1096 | "krb5_cc_default fails.\n"); | |
1097 | goto err; | |
1098 | } | |
1099 | ||
1100 | if ((krb5rc = krb5_cc_get_principal(krb5context, krb5ccdef, | |
1101 | &krb5creds.client)) != 0) { | |
1102 | kssl_err_set(kssl_err, SSL_R_KRB5_C_CC_PRINC, | |
1103 | "krb5_cc_get_principal() fails.\n"); | |
1104 | goto err; | |
1105 | } | |
1106 | ||
1107 | if ((krb5rc = krb5_get_credentials(krb5context, 0, krb5ccdef, | |
1108 | &krb5creds, &krb5credsp)) != 0) { | |
1109 | kssl_err_set(kssl_err, SSL_R_KRB5_C_GET_CRED, | |
1110 | "krb5_get_credentials() fails.\n"); | |
1111 | goto err; | |
1112 | } | |
1113 | ||
1114 | *enc_ticketp = &krb5credsp->ticket; | |
1115 | # ifdef KRB5_HEIMDAL | |
1116 | kssl_ctx->enctype = krb5credsp->session.keytype; | |
1117 | # else | |
1118 | kssl_ctx->enctype = krb5credsp->keyblock.enctype; | |
1119 | # endif | |
1120 | ||
1121 | krb5rc = KRB5KRB_ERR_GENERIC; | |
1122 | /* caller should free data of krb5_app_req */ | |
1123 | /* | |
1124 | * 20010406 VRS deleted for real KerberosWrapper 20010605 VRS reinstated | |
1125 | * to offer Authenticator to KerberosWrapper | |
1126 | */ | |
1127 | krb5_app_req.length = 0; | |
1128 | if (authenp) { | |
1129 | krb5_data krb5in_data; | |
1130 | const unsigned char *p; | |
1131 | long arlen; | |
1132 | KRB5_APREQBODY *ap_req; | |
1133 | ||
1134 | authenp->length = 0; | |
1135 | krb5in_data.data = NULL; | |
1136 | krb5in_data.length = 0; | |
1137 | if ((krb5rc = krb5_mk_req_extended(krb5context, | |
1138 | &krb5auth_context, 0, &krb5in_data, | |
1139 | krb5credsp, &krb5_app_req)) != 0) { | |
1140 | kssl_err_set(kssl_err, SSL_R_KRB5_C_MK_REQ, | |
1141 | "krb5_mk_req_extended() fails.\n"); | |
1142 | goto err; | |
1143 | } | |
43fcc1b0 | 1144 | |
0f113f3e MC |
1145 | arlen = krb5_app_req.length; |
1146 | p = (unsigned char *)krb5_app_req.data; | |
1147 | ap_req = (KRB5_APREQBODY *)d2i_KRB5_APREQ(NULL, &p, arlen); | |
1148 | if (ap_req) { | |
1149 | authenp->length = i2d_KRB5_ENCDATA(ap_req->authenticator, NULL); | |
1150 | if (authenp->length && (authenp->data = malloc(authenp->length))) { | |
1151 | unsigned char *adp = (unsigned char *)authenp->data; | |
1152 | authenp->length = | |
1153 | i2d_KRB5_ENCDATA(ap_req->authenticator, &adp); | |
1154 | } | |
1155 | } | |
1156 | ||
1157 | if (ap_req) | |
1158 | KRB5_APREQ_free((KRB5_APREQ *) ap_req); | |
1159 | if (krb5_app_req.length) | |
1160 | kssl_krb5_free_data_contents(krb5context, &krb5_app_req); | |
1161 | } | |
1162 | # ifdef KRB5_HEIMDAL | |
1163 | if (kssl_ctx_setkey(kssl_ctx, &krb5credsp->session)) { | |
1164 | kssl_err_set(kssl_err, SSL_R_KRB5_C_INIT, | |
1165 | "kssl_ctx_setkey() fails.\n"); | |
1166 | } | |
1167 | # else | |
1168 | if (kssl_ctx_setkey(kssl_ctx, &krb5credsp->keyblock)) { | |
1169 | kssl_err_set(kssl_err, SSL_R_KRB5_C_INIT, | |
1170 | "kssl_ctx_setkey() fails.\n"); | |
1171 | } | |
1172 | # endif | |
1173 | else | |
1174 | krb5rc = 0; | |
1175 | ||
1176 | err: | |
1177 | # ifdef KSSL_DEBUG | |
1178 | kssl_ctx_show(kssl_ctx); | |
1179 | # endif /* KSSL_DEBUG */ | |
1180 | ||
1181 | if (krb5creds.client) | |
1182 | krb5_free_principal(krb5context, krb5creds.client); | |
1183 | if (krb5creds.server) | |
1184 | krb5_free_principal(krb5context, krb5creds.server); | |
1185 | if (krb5auth_context) | |
1186 | krb5_auth_con_free(krb5context, krb5auth_context); | |
1187 | if (krb5context) | |
1188 | krb5_free_context(krb5context); | |
1189 | return (krb5rc); | |
1190 | } | |
43fcc1b0 | 1191 | |
1d97c843 TH |
1192 | /*- |
1193 | * Given d2i_-decoded asn1ticket, allocate and return a new krb5_ticket. | |
1194 | * Return Kerberos error code and kssl_err struct on error. | |
1195 | * Allocates krb5_ticket and krb5_principal; caller should free these. | |
1196 | * | |
0f113f3e MC |
1197 | * 20010410 VRS Implemented krb5_decode_ticket() as |
1198 | * old_krb5_decode_ticket(). Missing from MIT1.0.6. | |
1199 | * 20010615 VRS Re-cast as openssl/asn1 d2i_*() functions. | |
1200 | * Re-used some of the old krb5_decode_ticket() | |
1201 | * code here. This tkt should alloc/free just | |
1202 | * like the real thing. | |
1d97c843 | 1203 | */ |
0f113f3e MC |
1204 | static krb5_error_code kssl_TKT2tkt( /* IN */ krb5_context krb5context, |
1205 | /* | |
1206 | * IN | |
1207 | */ KRB5_TKTBODY *asn1ticket, | |
1208 | /* | |
1209 | * OUT | |
1210 | */ krb5_ticket **krb5ticket, | |
1211 | /* | |
1212 | * OUT | |
1213 | */ KSSL_ERR *kssl_err) | |
1214 | { | |
1215 | krb5_error_code krb5rc = KRB5KRB_ERR_GENERIC; | |
1216 | krb5_ticket *new5ticket = NULL; | |
1217 | ASN1_GENERALSTRING *gstr_svc, *gstr_host; | |
1218 | ||
1219 | *krb5ticket = NULL; | |
1220 | ||
1221 | if (asn1ticket == NULL || asn1ticket->realm == NULL || | |
1222 | asn1ticket->sname == NULL || | |
1223 | sk_ASN1_GENERALSTRING_num(asn1ticket->sname->namestring) < 2) { | |
1224 | BIO_snprintf(kssl_err->text, KSSL_ERR_MAX, | |
1225 | "Null field in asn1ticket.\n"); | |
1226 | kssl_err->reason = SSL_R_KRB5_S_RD_REQ; | |
1227 | return KRB5KRB_ERR_GENERIC; | |
1228 | } | |
1229 | ||
1230 | if ((new5ticket = (krb5_ticket *)calloc(1, sizeof(krb5_ticket))) == NULL) { | |
1231 | BIO_snprintf(kssl_err->text, KSSL_ERR_MAX, | |
1232 | "Unable to allocate new krb5_ticket.\n"); | |
1233 | kssl_err->reason = SSL_R_KRB5_S_RD_REQ; | |
1234 | return ENOMEM; /* or KRB5KRB_ERR_GENERIC; */ | |
1235 | } | |
1236 | ||
1237 | gstr_svc = sk_ASN1_GENERALSTRING_value(asn1ticket->sname->namestring, 0); | |
1238 | gstr_host = sk_ASN1_GENERALSTRING_value(asn1ticket->sname->namestring, 1); | |
1239 | ||
1240 | if ((krb5rc = kssl_build_principal_2(krb5context, | |
1241 | &new5ticket->server, | |
1242 | asn1ticket->realm->length, | |
1243 | (char *)asn1ticket->realm->data, | |
1244 | gstr_svc->length, | |
1245 | (char *)gstr_svc->data, | |
1246 | gstr_host->length, | |
1247 | (char *)gstr_host->data)) != 0) { | |
1248 | free(new5ticket); | |
1249 | BIO_snprintf(kssl_err->text, KSSL_ERR_MAX, | |
1250 | "Error building ticket server principal.\n"); | |
1251 | kssl_err->reason = SSL_R_KRB5_S_RD_REQ; | |
1252 | return krb5rc; /* or KRB5KRB_ERR_GENERIC; */ | |
1253 | } | |
2a1ef754 | 1254 | |
0f113f3e MC |
1255 | krb5_princ_type(krb5context, new5ticket->server) = |
1256 | asn1ticket->sname->nametype->data[0]; | |
1257 | new5ticket->enc_part.enctype = asn1ticket->encdata->etype->data[0]; | |
1258 | new5ticket->enc_part.kvno = asn1ticket->encdata->kvno->data[0]; | |
1259 | new5ticket->enc_part.ciphertext.length = | |
1260 | asn1ticket->encdata->cipher->length; | |
1261 | if ((new5ticket->enc_part.ciphertext.data = | |
1262 | calloc(1, asn1ticket->encdata->cipher->length)) == NULL) { | |
1263 | free(new5ticket); | |
1264 | BIO_snprintf(kssl_err->text, KSSL_ERR_MAX, | |
1265 | "Error allocating cipher in krb5ticket.\n"); | |
1266 | kssl_err->reason = SSL_R_KRB5_S_RD_REQ; | |
1267 | return KRB5KRB_ERR_GENERIC; | |
1268 | } else { | |
1269 | memcpy(new5ticket->enc_part.ciphertext.data, | |
1270 | asn1ticket->encdata->cipher->data, | |
1271 | asn1ticket->encdata->cipher->length); | |
1272 | } | |
1273 | ||
1274 | *krb5ticket = new5ticket; | |
1275 | return 0; | |
1276 | } | |
2a1ef754 | 1277 | |
23a22b4c | 1278 | /*- |
0f113f3e MC |
1279 | * Given krb5 service name in KSSL_CTX *kssl_ctx (typically "kssl"), |
1280 | * and krb5 AP_REQ message & message length, | |
1281 | * Return Kerberos session key and client principle | |
1282 | * to SSL Server in KSSL_CTX *kssl_ctx. | |
1d97c843 | 1283 | * |
0f113f3e | 1284 | * 19990702 VRS Started. |
1d97c843 | 1285 | */ |
0f113f3e MC |
1286 | krb5_error_code kssl_sget_tkt( /* UPDATE */ KSSL_CTX *kssl_ctx, |
1287 | /* | |
1288 | * IN | |
1289 | */ krb5_data *indata, | |
1290 | /* | |
1291 | * OUT | |
1292 | */ krb5_ticket_times *ttimes, | |
1293 | /* | |
1294 | * OUT | |
1295 | */ KSSL_ERR *kssl_err) | |
1296 | { | |
1297 | krb5_error_code krb5rc = KRB5KRB_ERR_GENERIC; | |
1298 | static krb5_context krb5context = NULL; | |
1299 | static krb5_auth_context krb5auth_context = NULL; | |
1300 | krb5_ticket *krb5ticket = NULL; | |
1301 | KRB5_TKTBODY *asn1ticket = NULL; | |
1302 | const unsigned char *p; | |
1303 | krb5_keytab krb5keytab = NULL; | |
1304 | krb5_keytab_entry kt_entry; | |
1305 | krb5_principal krb5server; | |
1306 | krb5_rcache rcache = NULL; | |
1307 | ||
1308 | kssl_err_set(kssl_err, 0, ""); | |
1309 | ||
1310 | if (!kssl_ctx) { | |
1311 | kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, "No kssl_ctx defined.\n"); | |
1312 | goto err; | |
1313 | } | |
1314 | # ifdef KSSL_DEBUG | |
1315 | fprintf(stderr, "in kssl_sget_tkt(%s)\n", | |
1316 | kstring(kssl_ctx->service_name)); | |
1317 | # endif /* KSSL_DEBUG */ | |
1318 | ||
1319 | if (!krb5context && (krb5rc = krb5_init_context(&krb5context))) { | |
1320 | kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, | |
1321 | "krb5_init_context() fails.\n"); | |
1322 | goto err; | |
1323 | } | |
1324 | if (krb5auth_context && | |
1325 | (krb5rc = krb5_auth_con_free(krb5context, krb5auth_context))) { | |
1326 | kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, | |
1327 | "krb5_auth_con_free() fails.\n"); | |
1328 | goto err; | |
1329 | } else | |
1330 | krb5auth_context = NULL; | |
1331 | if (!krb5auth_context && | |
1332 | (krb5rc = krb5_auth_con_init(krb5context, &krb5auth_context))) { | |
1333 | kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, | |
1334 | "krb5_auth_con_init() fails.\n"); | |
1335 | goto err; | |
1336 | } | |
a5224c34 | 1337 | |
0f113f3e MC |
1338 | if ((krb5rc = krb5_auth_con_getrcache(krb5context, krb5auth_context, |
1339 | &rcache))) { | |
1340 | kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, | |
1341 | "krb5_auth_con_getrcache() fails.\n"); | |
1342 | goto err; | |
1343 | } | |
a5224c34 | 1344 | |
0f113f3e MC |
1345 | if ((krb5rc = krb5_sname_to_principal(krb5context, NULL, |
1346 | (kssl_ctx->service_name) ? | |
1347 | kssl_ctx->service_name : KRB5SVC, | |
1348 | KRB5_NT_SRV_HST, | |
1349 | &krb5server)) != 0) { | |
1350 | kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, | |
1351 | "krb5_sname_to_principal() fails.\n"); | |
1352 | goto err; | |
1353 | } | |
a5224c34 | 1354 | |
0f113f3e MC |
1355 | if (rcache == NULL) { |
1356 | if ((krb5rc = krb5_get_server_rcache(krb5context, | |
1357 | krb5_princ_component(krb5context, | |
1358 | krb5server, | |
1359 | 0), | |
1360 | &rcache))) { | |
1361 | kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, | |
1362 | "krb5_get_server_rcache() fails.\n"); | |
1363 | goto err; | |
1364 | } | |
1365 | } | |
2a1ef754 | 1366 | |
0f113f3e MC |
1367 | if ((krb5rc = |
1368 | krb5_auth_con_setrcache(krb5context, krb5auth_context, rcache))) { | |
1369 | kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, | |
1370 | "krb5_auth_con_setrcache() fails.\n"); | |
1371 | goto err; | |
1372 | } | |
1373 | ||
1374 | /* | |
1375 | * kssl_ctx->keytab_file == NULL ==> use Kerberos default | |
1376 | */ | |
1377 | if (kssl_ctx->keytab_file) { | |
1378 | krb5rc = krb5_kt_resolve(krb5context, kssl_ctx->keytab_file, | |
1379 | &krb5keytab); | |
1380 | if (krb5rc) { | |
1381 | kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, | |
1382 | "krb5_kt_resolve() fails.\n"); | |
1383 | goto err; | |
43fcc1b0 | 1384 | } |
0f113f3e MC |
1385 | } else { |
1386 | krb5rc = krb5_kt_default(krb5context, &krb5keytab); | |
1387 | if (krb5rc) { | |
1388 | kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, | |
1389 | "krb5_kt_default() fails.\n"); | |
1390 | goto err; | |
1391 | } | |
1392 | } | |
1393 | ||
1394 | /*- Actual Kerberos5 krb5_recvauth() has initial conversation here | |
1395 | * o check KRB5_SENDAUTH_BADAUTHVERS | |
1396 | * unless KRB5_RECVAUTH_SKIP_VERSION | |
1397 | * o check KRB5_SENDAUTH_BADAPPLVERS | |
1398 | * o send "0" msg if all OK | |
1399 | */ | |
1400 | ||
1401 | /*- | |
1402 | * 20010411 was using AP_REQ instead of true KerberosWrapper | |
1403 | * | |
1404 | * if ((krb5rc = krb5_rd_req(krb5context, &krb5auth_context, | |
1405 | * &krb5in_data, krb5server, krb5keytab, | |
1406 | * &ap_option, &krb5ticket)) != 0) { Error } | |
1407 | */ | |
1408 | ||
1409 | p = (unsigned char *)indata->data; | |
1410 | if ((asn1ticket = (KRB5_TKTBODY *)d2i_KRB5_TICKET(NULL, &p, | |
1411 | (long)indata->length)) | |
1412 | == NULL) { | |
1413 | BIO_snprintf(kssl_err->text, KSSL_ERR_MAX, | |
1414 | "d2i_KRB5_TICKET() ASN.1 decode failure.\n"); | |
1415 | kssl_err->reason = SSL_R_KRB5_S_RD_REQ; | |
1416 | goto err; | |
1417 | } | |
43fcc1b0 | 1418 | |
0f113f3e MC |
1419 | /* |
1420 | * Was: krb5rc = krb5_decode_ticket(krb5in_data,&krb5ticket)) != 0) | |
1421 | */ | |
1422 | if ((krb5rc = kssl_TKT2tkt(krb5context, asn1ticket, &krb5ticket, | |
1423 | kssl_err)) != 0) { | |
1424 | BIO_snprintf(kssl_err->text, KSSL_ERR_MAX, | |
1425 | "Error converting ASN.1 ticket to krb5_ticket.\n"); | |
1426 | kssl_err->reason = SSL_R_KRB5_S_RD_REQ; | |
1427 | goto err; | |
1428 | } | |
43fcc1b0 | 1429 | |
0f113f3e MC |
1430 | if (!krb5_principal_compare(krb5context, krb5server, krb5ticket->server)) { |
1431 | krb5rc = KRB5_PRINC_NOMATCH; | |
1432 | BIO_snprintf(kssl_err->text, KSSL_ERR_MAX, | |
1433 | "server principal != ticket principal\n"); | |
1434 | kssl_err->reason = SSL_R_KRB5_S_RD_REQ; | |
1435 | goto err; | |
1436 | } | |
1437 | if ((krb5rc = krb5_kt_get_entry(krb5context, krb5keytab, | |
1438 | krb5ticket->server, | |
1439 | krb5ticket->enc_part.kvno, | |
1440 | krb5ticket->enc_part.enctype, | |
1441 | &kt_entry)) != 0) { | |
1442 | BIO_snprintf(kssl_err->text, KSSL_ERR_MAX, | |
1443 | "krb5_kt_get_entry() fails with %x.\n", krb5rc); | |
1444 | kssl_err->reason = SSL_R_KRB5_S_RD_REQ; | |
1445 | goto err; | |
1446 | } | |
1447 | if ((krb5rc = krb5_decrypt_tkt_part(krb5context, &kt_entry.key, | |
1448 | krb5ticket)) != 0) { | |
1449 | BIO_snprintf(kssl_err->text, KSSL_ERR_MAX, | |
1450 | "krb5_decrypt_tkt_part() failed.\n"); | |
1451 | kssl_err->reason = SSL_R_KRB5_S_RD_REQ; | |
1452 | goto err; | |
1453 | } else { | |
1454 | krb5_kt_free_entry(krb5context, &kt_entry); | |
1455 | # ifdef KSSL_DEBUG | |
43fcc1b0 | 1456 | { |
0f113f3e MC |
1457 | int i; |
1458 | krb5_address **paddr = krb5ticket->enc_part2->caddrs; | |
1459 | fprintf(stderr, "Decrypted ticket fields:\n"); | |
1460 | fprintf(stderr, "\tflags: %X, transit-type: %X", | |
1461 | krb5ticket->enc_part2->flags, | |
1462 | krb5ticket->enc_part2->transited.tr_type); | |
1463 | print_krb5_data("\ttransit-data: ", | |
1464 | &(krb5ticket->enc_part2->transited.tr_contents)); | |
1465 | fprintf(stderr, "\tcaddrs: %p, authdata: %p\n", | |
1466 | krb5ticket->enc_part2->caddrs, | |
1467 | krb5ticket->enc_part2->authorization_data); | |
1468 | if (paddr) { | |
1469 | fprintf(stderr, "\tcaddrs:\n"); | |
1470 | for (i = 0; paddr[i] != NULL; i++) { | |
1471 | krb5_data d; | |
1472 | d.length = paddr[i]->length; | |
1473 | d.data = paddr[i]->contents; | |
1474 | print_krb5_data("\t\tIP: ", &d); | |
1475 | } | |
1476 | } | |
1477 | fprintf(stderr, "\tstart/auth/end times: %d / %d / %d\n", | |
1478 | krb5ticket->enc_part2->times.starttime, | |
1479 | krb5ticket->enc_part2->times.authtime, | |
1480 | krb5ticket->enc_part2->times.endtime); | |
43fcc1b0 | 1481 | } |
0f113f3e MC |
1482 | # endif /* KSSL_DEBUG */ |
1483 | } | |
43fcc1b0 | 1484 | |
0f113f3e MC |
1485 | krb5rc = KRB5_NO_TKT_SUPPLIED; |
1486 | if (!krb5ticket || !krb5ticket->enc_part2 || | |
1487 | !krb5ticket->enc_part2->client || | |
1488 | !krb5ticket->enc_part2->client->data || | |
1489 | !krb5ticket->enc_part2->session) { | |
1490 | kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET, | |
1491 | "bad ticket from krb5_rd_req.\n"); | |
1492 | } else if (kssl_ctx_setprinc(kssl_ctx, KSSL_CLIENT, | |
1493 | &krb5ticket->enc_part2->client->realm, | |
1494 | krb5ticket->enc_part2->client->data, | |
1495 | krb5ticket->enc_part2->client->length)) { | |
1496 | kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET, | |
1497 | "kssl_ctx_setprinc() fails.\n"); | |
1498 | } else if (kssl_ctx_setkey(kssl_ctx, krb5ticket->enc_part2->session)) { | |
1499 | kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET, | |
1500 | "kssl_ctx_setkey() fails.\n"); | |
1501 | } else if (krb5ticket->enc_part2->flags & TKT_FLG_INVALID) { | |
1502 | krb5rc = KRB5KRB_AP_ERR_TKT_INVALID; | |
1503 | kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET, | |
1504 | "invalid ticket from krb5_rd_req.\n"); | |
1505 | } else | |
1506 | krb5rc = 0; | |
1507 | ||
1508 | kssl_ctx->enctype = krb5ticket->enc_part.enctype; | |
1509 | ttimes->authtime = krb5ticket->enc_part2->times.authtime; | |
1510 | ttimes->starttime = krb5ticket->enc_part2->times.starttime; | |
1511 | ttimes->endtime = krb5ticket->enc_part2->times.endtime; | |
1512 | ttimes->renew_till = krb5ticket->enc_part2->times.renew_till; | |
43fcc1b0 | 1513 | |
0f113f3e MC |
1514 | err: |
1515 | # ifdef KSSL_DEBUG | |
1516 | kssl_ctx_show(kssl_ctx); | |
1517 | # endif /* KSSL_DEBUG */ | |
1518 | ||
1519 | if (asn1ticket) | |
1520 | KRB5_TICKET_free((KRB5_TICKET *) asn1ticket); | |
1521 | if (krb5keytab) | |
1522 | krb5_kt_close(krb5context, krb5keytab); | |
1523 | if (krb5ticket) | |
1524 | krb5_free_ticket(krb5context, krb5ticket); | |
1525 | if (krb5server) | |
1526 | krb5_free_principal(krb5context, krb5server); | |
1527 | return (krb5rc); | |
1528 | } | |
1529 | ||
1530 | /* | |
1531 | * Allocate & return a new kssl_ctx struct. | |
1d97c843 | 1532 | */ |
0f113f3e MC |
1533 | KSSL_CTX *kssl_ctx_new(void) |
1534 | { | |
1535 | return ((KSSL_CTX *)kssl_calloc(1, sizeof(KSSL_CTX))); | |
1536 | } | |
1537 | ||
1538 | /* | |
1539 | * Frees a kssl_ctx struct and any allocated memory it holds. Returns NULL. | |
1540 | */ | |
1541 | KSSL_CTX *kssl_ctx_free(KSSL_CTX *kssl_ctx) | |
1542 | { | |
1543 | if (kssl_ctx == NULL) | |
1544 | return kssl_ctx; | |
1545 | ||
1546 | if (kssl_ctx->key) | |
1547 | OPENSSL_cleanse(kssl_ctx->key, kssl_ctx->length); | |
1548 | if (kssl_ctx->key) | |
1549 | kssl_free(kssl_ctx->key); | |
1550 | if (kssl_ctx->client_princ) | |
1551 | kssl_free(kssl_ctx->client_princ); | |
1552 | if (kssl_ctx->service_host) | |
1553 | kssl_free(kssl_ctx->service_host); | |
1554 | if (kssl_ctx->service_name) | |
1555 | kssl_free(kssl_ctx->service_name); | |
1556 | if (kssl_ctx->keytab_file) | |
1557 | kssl_free(kssl_ctx->keytab_file); | |
43fcc1b0 | 1558 | |
0f113f3e MC |
1559 | kssl_free(kssl_ctx); |
1560 | return (KSSL_CTX *)NULL; | |
1561 | } | |
43fcc1b0 | 1562 | |
0f113f3e MC |
1563 | /* |
1564 | * Given an array of (krb5_data *) entity (and optional realm), set the plain | |
1565 | * (char *) client_princ or service_host member of the kssl_ctx struct. | |
1d97c843 | 1566 | */ |
43fcc1b0 RL |
1567 | krb5_error_code |
1568 | kssl_ctx_setprinc(KSSL_CTX *kssl_ctx, int which, | |
0f113f3e MC |
1569 | krb5_data *realm, krb5_data *entity, int nentities) |
1570 | { | |
1571 | char **princ; | |
1572 | int length; | |
1573 | int i; | |
1574 | ||
1575 | if (kssl_ctx == NULL || entity == NULL) | |
1576 | return KSSL_CTX_ERR; | |
1577 | ||
1578 | switch (which) { | |
1579 | case KSSL_CLIENT: | |
1580 | princ = &kssl_ctx->client_princ; | |
1581 | break; | |
1582 | case KSSL_SERVER: | |
1583 | princ = &kssl_ctx->service_host; | |
1584 | break; | |
1585 | default: | |
1586 | return KSSL_CTX_ERR; | |
1587 | break; | |
1588 | } | |
1589 | if (*princ) | |
1590 | kssl_free(*princ); | |
1591 | ||
1592 | /* Add up all the entity->lengths */ | |
1593 | length = 0; | |
1594 | for (i = 0; i < nentities; i++) { | |
1595 | length += entity[i].length; | |
1596 | } | |
1597 | /* Add in space for the '/' character(s) (if any) */ | |
1598 | length += nentities - 1; | |
1599 | /* Space for the ('@'+realm+NULL | NULL) */ | |
1600 | length += ((realm) ? realm->length + 2 : 1); | |
1601 | ||
1602 | if ((*princ = kssl_calloc(1, length)) == NULL) | |
1603 | return KSSL_CTX_ERR; | |
1604 | else { | |
1605 | for (i = 0; i < nentities; i++) { | |
1606 | strncat(*princ, entity[i].data, entity[i].length); | |
1607 | if (i < nentities - 1) { | |
1608 | strcat(*princ, "/"); | |
1609 | } | |
1610 | } | |
1611 | if (realm) { | |
1612 | strcat(*princ, "@"); | |
1613 | (void)strncat(*princ, realm->data, realm->length); | |
43fcc1b0 | 1614 | } |
0f113f3e | 1615 | } |
43fcc1b0 | 1616 | |
0f113f3e MC |
1617 | return KSSL_CTX_OK; |
1618 | } | |
43fcc1b0 | 1619 | |
0f113f3e MC |
1620 | /*- Set one of the plain (char *) string members of the kssl_ctx struct. |
1621 | * Default values should be: | |
1622 | * which == KSSL_SERVICE => "khost" (KRB5SVC) | |
1623 | * which == KSSL_KEYTAB => "/etc/krb5.keytab" (KRB5KEYTAB) | |
1d97c843 | 1624 | */ |
0f113f3e MC |
1625 | krb5_error_code kssl_ctx_setstring(KSSL_CTX *kssl_ctx, int which, char *text) |
1626 | { | |
1627 | char **string; | |
1628 | ||
1629 | if (!kssl_ctx) | |
1630 | return KSSL_CTX_ERR; | |
1631 | ||
1632 | switch (which) { | |
1633 | case KSSL_SERVICE: | |
1634 | string = &kssl_ctx->service_name; | |
1635 | break; | |
1636 | case KSSL_SERVER: | |
1637 | string = &kssl_ctx->service_host; | |
1638 | break; | |
1639 | case KSSL_CLIENT: | |
1640 | string = &kssl_ctx->client_princ; | |
1641 | break; | |
1642 | case KSSL_KEYTAB: | |
1643 | string = &kssl_ctx->keytab_file; | |
1644 | break; | |
1645 | default: | |
1646 | return KSSL_CTX_ERR; | |
1647 | break; | |
1648 | } | |
1649 | if (*string) | |
1650 | kssl_free(*string); | |
43fcc1b0 | 1651 | |
0f113f3e MC |
1652 | if (!text) { |
1653 | *string = '\0'; | |
1654 | return KSSL_CTX_OK; | |
1655 | } | |
1656 | ||
1657 | if ((*string = kssl_calloc(1, strlen(text) + 1)) == NULL) | |
1658 | return KSSL_CTX_ERR; | |
1659 | else | |
1660 | strcpy(*string, text); | |
43fcc1b0 | 1661 | |
0f113f3e MC |
1662 | return KSSL_CTX_OK; |
1663 | } | |
1664 | ||
1665 | /* | |
1666 | * Copy the Kerberos session key from a (krb5_keyblock *) to a kssl_ctx | |
1667 | * struct. Clear kssl_ctx->key if Kerberos session key is NULL. | |
1d97c843 | 1668 | */ |
0f113f3e MC |
1669 | krb5_error_code kssl_ctx_setkey(KSSL_CTX *kssl_ctx, krb5_keyblock *session) |
1670 | { | |
1671 | int length; | |
1672 | krb5_enctype enctype; | |
1673 | krb5_octet FAR *contents = NULL; | |
43fcc1b0 | 1674 | |
0f113f3e MC |
1675 | if (!kssl_ctx) |
1676 | return KSSL_CTX_ERR; | |
43fcc1b0 | 1677 | |
0f113f3e MC |
1678 | if (kssl_ctx->key) { |
1679 | OPENSSL_cleanse(kssl_ctx->key, kssl_ctx->length); | |
1680 | kssl_free(kssl_ctx->key); | |
1681 | } | |
43fcc1b0 | 1682 | |
0f113f3e MC |
1683 | if (session) { |
1684 | ||
1685 | # ifdef KRB5_HEIMDAL | |
1686 | length = session->keyvalue->length; | |
1687 | enctype = session->keytype; | |
1688 | contents = session->keyvalue->contents; | |
1689 | # else | |
1690 | length = session->length; | |
1691 | enctype = session->enctype; | |
1692 | contents = session->contents; | |
1693 | # endif | |
1694 | kssl_ctx->enctype = enctype; | |
1695 | kssl_ctx->length = length; | |
1696 | } else { | |
1697 | kssl_ctx->enctype = ENCTYPE_UNKNOWN; | |
1698 | kssl_ctx->length = 0; | |
1699 | return KSSL_CTX_OK; | |
1700 | } | |
1701 | ||
1702 | if ((kssl_ctx->key = | |
1703 | (krb5_octet FAR *)kssl_calloc(1, kssl_ctx->length)) == NULL) { | |
1704 | kssl_ctx->length = 0; | |
1705 | return KSSL_CTX_ERR; | |
1706 | } else | |
1707 | memcpy(kssl_ctx->key, contents, length); | |
1708 | ||
1709 | return KSSL_CTX_OK; | |
1710 | } | |
1711 | ||
1712 | /* | |
1713 | * Display contents of kssl_ctx struct | |
1714 | */ | |
1715 | void kssl_ctx_show(KSSL_CTX *kssl_ctx) | |
1716 | { | |
1717 | int i; | |
1718 | ||
1719 | printf("kssl_ctx: "); | |
1720 | if (kssl_ctx == NULL) { | |
1721 | printf("NULL\n"); | |
1722 | return; | |
1723 | } else | |
1724 | printf("%p\n", (void *)kssl_ctx); | |
1725 | ||
1726 | printf("\tservice:\t%s\n", | |
1727 | (kssl_ctx->service_name) ? kssl_ctx->service_name : "NULL"); | |
1728 | printf("\tclient:\t%s\n", | |
1729 | (kssl_ctx->client_princ) ? kssl_ctx->client_princ : "NULL"); | |
1730 | printf("\tserver:\t%s\n", | |
1731 | (kssl_ctx->service_host) ? kssl_ctx->service_host : "NULL"); | |
1732 | printf("\tkeytab:\t%s\n", | |
1733 | (kssl_ctx->keytab_file) ? kssl_ctx->keytab_file : "NULL"); | |
1734 | printf("\tkey [%d:%d]:\t", kssl_ctx->enctype, kssl_ctx->length); | |
1735 | ||
1736 | for (i = 0; i < kssl_ctx->length && kssl_ctx->key; i++) { | |
1737 | printf("%02x", kssl_ctx->key[i]); | |
1738 | } | |
1739 | printf("\n"); | |
1740 | return; | |
1741 | } | |
1742 | ||
1743 | int kssl_keytab_is_available(KSSL_CTX *kssl_ctx) | |
a5224c34 | 1744 | { |
0f113f3e MC |
1745 | krb5_context krb5context = NULL; |
1746 | krb5_keytab krb5keytab = NULL; | |
1747 | krb5_keytab_entry entry; | |
1748 | krb5_principal princ = NULL; | |
1749 | krb5_error_code krb5rc = KRB5KRB_ERR_GENERIC; | |
a5224c34 RL |
1750 | int rc = 0; |
1751 | ||
1752 | if ((krb5rc = krb5_init_context(&krb5context))) | |
0f113f3e | 1753 | return (0); |
a5224c34 | 1754 | |
0f113f3e MC |
1755 | /* |
1756 | * kssl_ctx->keytab_file == NULL ==> use Kerberos default | |
1757 | */ | |
1758 | if (kssl_ctx->keytab_file) { | |
a5224c34 | 1759 | krb5rc = krb5_kt_resolve(krb5context, kssl_ctx->keytab_file, |
0f113f3e | 1760 | &krb5keytab); |
a5224c34 RL |
1761 | if (krb5rc) |
1762 | goto exit; | |
0f113f3e MC |
1763 | } else { |
1764 | krb5rc = krb5_kt_default(krb5context, &krb5keytab); | |
a5224c34 RL |
1765 | if (krb5rc) |
1766 | goto exit; | |
1767 | } | |
1768 | ||
1769 | /* the host key we are looking for */ | |
0f113f3e MC |
1770 | krb5rc = krb5_sname_to_principal(krb5context, NULL, |
1771 | kssl_ctx-> | |
1772 | service_name ? kssl_ctx->service_name : | |
1773 | KRB5SVC, KRB5_NT_SRV_HST, &princ); | |
a5224c34 | 1774 | |
cca1cd9a | 1775 | if (krb5rc) |
0f113f3e MC |
1776 | goto exit; |
1777 | ||
1778 | krb5rc = krb5_kt_get_entry(krb5context, krb5keytab, princ, | |
1779 | /* IGNORE_VNO */ | |
1780 | 0, | |
1781 | /* IGNORE_ENCTYPE */ | |
1782 | 0, &entry); | |
1783 | if (krb5rc == KRB5_KT_NOTFOUND) { | |
a5224c34 RL |
1784 | rc = 1; |
1785 | goto exit; | |
0f113f3e | 1786 | } else if (krb5rc) |
a5224c34 | 1787 | goto exit; |
0f113f3e | 1788 | |
a5224c34 RL |
1789 | krb5_kt_free_entry(krb5context, &entry); |
1790 | rc = 1; | |
1791 | ||
0f113f3e MC |
1792 | exit: |
1793 | if (krb5keytab) | |
1794 | krb5_kt_close(krb5context, krb5keytab); | |
1795 | if (princ) | |
1796 | krb5_free_principal(krb5context, princ); | |
1797 | if (krb5context) | |
1798 | krb5_free_context(krb5context); | |
1799 | return (rc); | |
a5224c34 RL |
1800 | } |
1801 | ||
0f113f3e MC |
1802 | int kssl_tgt_is_available(KSSL_CTX *kssl_ctx) |
1803 | { | |
1804 | krb5_error_code krb5rc = KRB5KRB_ERR_GENERIC; | |
1805 | krb5_context krb5context = NULL; | |
1806 | krb5_ccache krb5ccdef = NULL; | |
1807 | krb5_creds krb5creds, *krb5credsp = NULL; | |
1808 | int rc = 0; | |
a5224c34 | 1809 | |
0f113f3e | 1810 | memset((char *)&krb5creds, 0, sizeof(krb5creds)); |
a5224c34 | 1811 | |
0f113f3e MC |
1812 | if (!kssl_ctx) |
1813 | return (0); | |
a5224c34 | 1814 | |
0f113f3e MC |
1815 | if (!kssl_ctx->service_host) |
1816 | return (0); | |
a5224c34 | 1817 | |
0f113f3e MC |
1818 | if ((krb5rc = krb5_init_context(&krb5context)) != 0) |
1819 | goto err; | |
a5224c34 | 1820 | |
0f113f3e MC |
1821 | if ((krb5rc = krb5_sname_to_principal(krb5context, |
1822 | kssl_ctx->service_host, | |
1823 | (kssl_ctx->service_name) ? | |
1824 | kssl_ctx->service_name : KRB5SVC, | |
1825 | KRB5_NT_SRV_HST, | |
1826 | &krb5creds.server)) != 0) | |
1827 | goto err; | |
a5224c34 | 1828 | |
0f113f3e MC |
1829 | if ((krb5rc = krb5_cc_default(krb5context, &krb5ccdef)) != 0) |
1830 | goto err; | |
a5224c34 | 1831 | |
0f113f3e MC |
1832 | if ((krb5rc = krb5_cc_get_principal(krb5context, krb5ccdef, |
1833 | &krb5creds.client)) != 0) | |
1834 | goto err; | |
a5224c34 | 1835 | |
0f113f3e MC |
1836 | if ((krb5rc = krb5_get_credentials(krb5context, 0, krb5ccdef, |
1837 | &krb5creds, &krb5credsp)) != 0) | |
1838 | goto err; | |
a5224c34 | 1839 | |
0f113f3e | 1840 | rc = 1; |
a5224c34 | 1841 | |
0f113f3e MC |
1842 | err: |
1843 | # ifdef KSSL_DEBUG | |
1844 | kssl_ctx_show(kssl_ctx); | |
1845 | # endif /* KSSL_DEBUG */ | |
1846 | ||
1847 | if (krb5creds.client) | |
1848 | krb5_free_principal(krb5context, krb5creds.client); | |
1849 | if (krb5creds.server) | |
1850 | krb5_free_principal(krb5context, krb5creds.server); | |
1851 | if (krb5context) | |
1852 | krb5_free_context(krb5context); | |
1853 | return (rc); | |
1854 | } | |
a5224c34 | 1855 | |
0f113f3e | 1856 | # if !defined(OPENSSL_SYS_WINDOWS) && !defined(OPENSSL_SYS_WIN32) |
f9b3bff6 | 1857 | void kssl_krb5_free_data_contents(krb5_context context, krb5_data *data) |
0f113f3e MC |
1858 | { |
1859 | # ifdef KRB5_HEIMDAL | |
1860 | data->length = 0; | |
1861 | if (data->data) | |
1862 | free(data->data); | |
1863 | # elif defined(KRB5_MIT_OLD11) | |
1864 | if (data->data) { | |
1865 | krb5_xfree(data->data); | |
1866 | data->data = 0; | |
1867 | } | |
1868 | # else | |
1869 | krb5_free_data_contents(NULL, data); | |
1870 | # endif | |
1871 | } | |
1872 | # endif | |
68d39f3c | 1873 | /* !OPENSSL_SYS_WINDOWS && !OPENSSL_SYS_WIN32 */ |
2a1ef754 | 1874 | |
0f113f3e MC |
1875 | /* |
1876 | * Given pointers to KerberosTime and struct tm structs, convert the | |
1877 | * KerberosTime string to struct tm. Note that KerberosTime is a | |
1878 | * ASN1_GENERALIZEDTIME value, constrained to GMT with no fractional seconds | |
1879 | * as defined in RFC 1510. Return pointer to the (partially) filled in | |
1880 | * struct tm on success, return NULL on failure. | |
1d97c843 | 1881 | */ |
ef236ec3 | 1882 | static struct tm *k_gmtime(ASN1_GENERALIZEDTIME *gtime, struct tm *k_tm) |
0f113f3e MC |
1883 | { |
1884 | char c, *p; | |
1885 | ||
1886 | if (!k_tm) | |
1887 | return NULL; | |
1888 | if (gtime == NULL || gtime->length < 14) | |
1889 | return NULL; | |
1890 | if (gtime->data == NULL) | |
1891 | return NULL; | |
1892 | ||
1893 | p = (char *)>ime->data[14]; | |
1894 | ||
1895 | c = *p; | |
1896 | *p = '\0'; | |
1897 | p -= 2; | |
1898 | k_tm->tm_sec = atoi(p); | |
1899 | *(p + 2) = c; | |
1900 | c = *p; | |
1901 | *p = '\0'; | |
1902 | p -= 2; | |
1903 | k_tm->tm_min = atoi(p); | |
1904 | *(p + 2) = c; | |
1905 | c = *p; | |
1906 | *p = '\0'; | |
1907 | p -= 2; | |
1908 | k_tm->tm_hour = atoi(p); | |
1909 | *(p + 2) = c; | |
1910 | c = *p; | |
1911 | *p = '\0'; | |
1912 | p -= 2; | |
1913 | k_tm->tm_mday = atoi(p); | |
1914 | *(p + 2) = c; | |
1915 | c = *p; | |
1916 | *p = '\0'; | |
1917 | p -= 2; | |
1918 | k_tm->tm_mon = atoi(p) - 1; | |
1919 | *(p + 2) = c; | |
1920 | c = *p; | |
1921 | *p = '\0'; | |
1922 | p -= 4; | |
1923 | k_tm->tm_year = atoi(p) - 1900; | |
1924 | *(p + 4) = c; | |
1925 | ||
1926 | return k_tm; | |
1927 | } | |
acdf4afb | 1928 | |
0f113f3e MC |
1929 | /* |
1930 | * Helper function for kssl_validate_times(). We need context->clockskew, | |
1931 | * but krb5_context is an opaque struct. So we try to sneek the clockskew | |
1932 | * out through the replay cache. If that fails just return a likely default | |
1933 | * (300 seconds). | |
1d97c843 | 1934 | */ |
ef236ec3 | 1935 | static krb5_deltat get_rc_clockskew(krb5_context context) |
0f113f3e MC |
1936 | { |
1937 | krb5_rcache rc; | |
1938 | krb5_deltat clockskew; | |
1939 | ||
1940 | if (krb5_rc_default(context, &rc)) | |
1941 | return KSSL_CLOCKSKEW; | |
1942 | if (krb5_rc_initialize(context, rc, 0)) | |
1943 | return KSSL_CLOCKSKEW; | |
1944 | if (krb5_rc_get_lifespan(context, rc, &clockskew)) { | |
1945 | clockskew = KSSL_CLOCKSKEW; | |
1946 | } | |
1947 | (void)krb5_rc_destroy(context, rc); | |
1948 | return clockskew; | |
1949 | } | |
1950 | ||
1951 | /* | |
1952 | * kssl_validate_times() combines (and more importantly exposes) the MIT KRB5 | |
1953 | * internal function krb5_validate_times() and the in_clock_skew() macro. | |
1954 | * The authenticator client time is checked to be within clockskew secs of | |
1955 | * the current time and the current time is checked to be within the ticket | |
1956 | * start and expire times. Either check may be omitted by supplying a NULL | |
1957 | * value. Returns 0 for valid times, SSL_R_KRB5* error codes otherwise. See | |
1958 | * Also: (Kerberos source)/krb5/lib/krb5/krb/valid_times.c 20010420 VRS | |
1d97c843 | 1959 | */ |
0f113f3e MC |
1960 | krb5_error_code kssl_validate_times(krb5_timestamp atime, |
1961 | krb5_ticket_times *ttimes) | |
1962 | { | |
1963 | krb5_deltat skew; | |
1964 | krb5_timestamp start, now; | |
1965 | krb5_error_code rc; | |
1966 | krb5_context context; | |
1967 | ||
1968 | if ((rc = krb5_init_context(&context))) | |
1969 | return SSL_R_KRB5_S_BAD_TICKET; | |
1970 | skew = get_rc_clockskew(context); | |
1971 | if ((rc = krb5_timeofday(context, &now))) | |
1972 | return SSL_R_KRB5_S_BAD_TICKET; | |
1973 | krb5_free_context(context); | |
1974 | ||
1975 | if (atime && labs(atime - now) >= skew) | |
1976 | return SSL_R_KRB5_S_TKT_SKEW; | |
1977 | ||
1978 | if (!ttimes) | |
1979 | return 0; | |
1980 | ||
1981 | start = (ttimes->starttime != 0) ? ttimes->starttime : ttimes->authtime; | |
1982 | if (start - now > skew) | |
1983 | return SSL_R_KRB5_S_TKT_NYV; | |
1984 | if ((now - ttimes->endtime) > skew) | |
1985 | return SSL_R_KRB5_S_TKT_EXPIRED; | |
1986 | ||
1987 | # ifdef KSSL_DEBUG | |
1988 | fprintf(stderr, "kssl_validate_times: %d |<- | %d - %d | < %d ->| %d\n", | |
1989 | start, atime, now, skew, ttimes->endtime); | |
1990 | # endif /* KSSL_DEBUG */ | |
1991 | ||
1992 | return 0; | |
1993 | } | |
1994 | ||
1995 | /* | |
1996 | * Decode and decrypt given DER-encoded authenticator, then pass | |
1997 | * authenticator ctime back in *atimep (or 0 if time unavailable). Returns | |
1998 | * krb5_error_code and kssl_err on error. A NULL authenticator | |
1999 | * (authentp->length == 0) is not considered an error. Note that | |
2000 | * kssl_check_authent() makes use of the KRB5 session key; you must call | |
2001 | * kssl_sget_tkt() to get the key before calling this routine. | |
1d97c843 | 2002 | */ |
0f113f3e MC |
2003 | krb5_error_code kssl_check_authent( |
2004 | /* | |
2005 | * IN | |
2006 | */ KSSL_CTX *kssl_ctx, | |
2007 | /* | |
2008 | * IN | |
2009 | */ krb5_data *authentp, | |
2010 | /* | |
2011 | * OUT | |
2012 | */ krb5_timestamp *atimep, | |
2013 | /* | |
2014 | * OUT | |
2015 | */ KSSL_ERR *kssl_err) | |
2016 | { | |
2017 | krb5_error_code krb5rc = 0; | |
2018 | KRB5_ENCDATA *dec_authent = NULL; | |
2019 | KRB5_AUTHENTBODY *auth = NULL; | |
2020 | krb5_enctype enctype; | |
2021 | EVP_CIPHER_CTX ciph_ctx; | |
2022 | const EVP_CIPHER *enc = NULL; | |
2023 | unsigned char iv[EVP_MAX_IV_LENGTH]; | |
2024 | const unsigned char *p; | |
2025 | unsigned char *unenc_authent; | |
2026 | int outl, unencbufsize; | |
2027 | struct tm tm_time, *tm_l, *tm_g; | |
2028 | time_t now, tl, tg, tr, tz_offset; | |
2029 | ||
2030 | EVP_CIPHER_CTX_init(&ciph_ctx); | |
2031 | *atimep = 0; | |
2032 | kssl_err_set(kssl_err, 0, ""); | |
2033 | ||
2034 | # ifndef KRB5CHECKAUTH | |
2035 | authentp = NULL; | |
2036 | # else | |
2037 | # if KRB5CHECKAUTH == 0 | |
2038 | authentp = NULL; | |
2039 | # endif | |
2040 | # endif /* KRB5CHECKAUTH */ | |
2041 | ||
2042 | if (authentp == NULL || authentp->length == 0) | |
2043 | return 0; | |
2044 | ||
2045 | # ifdef KSSL_DEBUG | |
2046 | { | |
45442167 | 2047 | unsigned int ui; |
0f113f3e MC |
2048 | fprintf(stderr, "kssl_check_authent: authenticator[%d]:\n", |
2049 | authentp->length); | |
2050 | p = authentp->data; | |
2051 | for (ui = 0; ui < authentp->length; ui++) | |
2052 | fprintf(stderr, "%02x ", p[ui]); | |
2053 | fprintf(stderr, "\n"); | |
2054 | } | |
2055 | # endif /* KSSL_DEBUG */ | |
2056 | ||
2057 | unencbufsize = 2 * authentp->length; | |
2058 | if ((unenc_authent = calloc(1, unencbufsize)) == NULL) { | |
2059 | kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, | |
2060 | "Unable to allocate authenticator buffer.\n"); | |
2061 | krb5rc = KRB5KRB_ERR_GENERIC; | |
2062 | goto err; | |
2063 | } | |
2064 | ||
2065 | p = (unsigned char *)authentp->data; | |
2066 | if ((dec_authent = d2i_KRB5_ENCDATA(NULL, &p, | |
2067 | (long)authentp->length)) == NULL) { | |
2068 | kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, | |
2069 | "Error decoding authenticator.\n"); | |
2070 | krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY; | |
2071 | goto err; | |
2072 | } | |
2073 | ||
2074 | enctype = dec_authent->etype->data[0]; /* should = kssl_ctx->enctype */ | |
2075 | # if !defined(KRB5_MIT_OLD11) | |
2076 | switch (enctype) { | |
2077 | case ENCTYPE_DES3_CBC_SHA1: /* EVP_des_ede3_cbc(); */ | |
2078 | case ENCTYPE_DES3_CBC_SHA: | |
2079 | case ENCTYPE_DES3_CBC_RAW: | |
2080 | krb5rc = 0; /* Skip, can't handle derived keys */ | |
2081 | goto err; | |
2082 | } | |
2083 | # endif | |
2084 | enc = kssl_map_enc(enctype); | |
2085 | memset(iv, 0, sizeof iv); /* per RFC 1510 */ | |
2086 | ||
2087 | if (enc == NULL) { | |
2088 | /* | |
2089 | * Disable kssl_check_authent for ENCTYPE_DES3_CBC_SHA1. This | |
2090 | * enctype indicates the authenticator was encrypted using key-usage | |
2091 | * derived keys which openssl cannot decrypt. | |
2092 | */ | |
2093 | goto err; | |
2094 | } | |
2095 | ||
2096 | if (!EVP_CipherInit(&ciph_ctx, enc, kssl_ctx->key, iv, 0)) { | |
2097 | kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, | |
2098 | "EVP_CipherInit error decrypting authenticator.\n"); | |
2099 | krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY; | |
2100 | goto err; | |
2101 | } | |
2102 | outl = dec_authent->cipher->length; | |
2103 | if (!EVP_Cipher | |
2104 | (&ciph_ctx, unenc_authent, dec_authent->cipher->data, outl)) { | |
2105 | kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, | |
2106 | "EVP_Cipher error decrypting authenticator.\n"); | |
2107 | krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY; | |
2108 | goto err; | |
2109 | } | |
2110 | EVP_CIPHER_CTX_cleanup(&ciph_ctx); | |
2111 | ||
2112 | # ifdef KSSL_DEBUG | |
2113 | { | |
2114 | int padl; | |
2115 | fprintf(stderr, "kssl_check_authent: decrypted authenticator[%d] =\n", | |
2116 | outl); | |
2117 | for (padl = 0; padl < outl; padl++) | |
2118 | fprintf(stderr, "%02x ", unenc_authent[padl]); | |
2119 | fprintf(stderr, "\n"); | |
2120 | } | |
2121 | # endif /* KSSL_DEBUG */ | |
2122 | ||
2123 | if ((p = kssl_skip_confound(enctype, unenc_authent)) == NULL) { | |
2124 | kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, | |
2125 | "confounded by authenticator.\n"); | |
2126 | krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY; | |
2127 | goto err; | |
2128 | } | |
2129 | outl -= p - unenc_authent; | |
2130 | ||
2131 | if ((auth = (KRB5_AUTHENTBODY *)d2i_KRB5_AUTHENT(NULL, &p, | |
2132 | (long)outl)) == NULL) { | |
2133 | kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, | |
2134 | "Error decoding authenticator body.\n"); | |
2135 | krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY; | |
2136 | goto err; | |
2137 | } | |
2138 | ||
2139 | memset(&tm_time, 0, sizeof(struct tm)); | |
2140 | if (k_gmtime(auth->ctime, &tm_time) && | |
2141 | ((tr = mktime(&tm_time)) != (time_t)(-1))) { | |
2142 | now = time(&now); | |
2143 | tm_l = localtime(&now); | |
2144 | tl = mktime(tm_l); | |
2145 | tm_g = gmtime(&now); | |
2146 | tg = mktime(tm_g); | |
2147 | tz_offset = tg - tl; | |
2148 | ||
2149 | *atimep = (krb5_timestamp)(tr - tz_offset); | |
2150 | } | |
2151 | # ifdef KSSL_DEBUG | |
2152 | fprintf(stderr, "kssl_check_authent: returns %d for client time ", | |
2153 | *atimep); | |
2154 | if (auth->ctime && auth->ctime->length && auth->ctime->data) | |
2155 | fprintf(stderr, "%.*s\n", auth->ctime->length, auth->ctime->data); | |
2156 | else | |
2157 | fprintf(stderr, "NULL\n"); | |
2158 | # endif /* KSSL_DEBUG */ | |
2a1ef754 RL |
2159 | |
2160 | err: | |
0f113f3e MC |
2161 | if (auth) |
2162 | KRB5_AUTHENT_free((KRB5_AUTHENT *) auth); | |
2163 | if (dec_authent) | |
2164 | KRB5_ENCDATA_free(dec_authent); | |
2165 | if (unenc_authent) | |
2166 | free(unenc_authent); | |
2167 | EVP_CIPHER_CTX_cleanup(&ciph_ctx); | |
2168 | return krb5rc; | |
2169 | } | |
2170 | ||
2171 | /* | |
2172 | * Replaces krb5_build_principal_ext(), with varargs length == 2 (svc, host), | |
2173 | * because I don't know how to stub varargs. Returns krb5_error_code == | |
2174 | * ENOMEM on alloc error, otherwise passes back newly constructed principal, | |
2175 | * which should be freed by caller. | |
1d97c843 | 2176 | */ |
0f113f3e MC |
2177 | krb5_error_code kssl_build_principal_2( |
2178 | /* | |
2179 | * UPDATE | |
2180 | */ krb5_context context, | |
2181 | /* | |
2182 | * OUT | |
2183 | */ krb5_principal *princ, | |
2184 | /* | |
2185 | * IN | |
2186 | */ int rlen, const char *realm, | |
2187 | /* | |
2188 | * IN | |
2189 | */ int slen, const char *svc, | |
2190 | /* | |
2191 | * IN | |
2192 | */ int hlen, const char *host) | |
2193 | { | |
2194 | krb5_data *p_data = NULL; | |
2195 | krb5_principal new_p = NULL; | |
2196 | char *new_r = NULL; | |
2197 | ||
2198 | if ((p_data = (krb5_data *)calloc(2, sizeof(krb5_data))) == NULL || | |
2199 | (new_p = (krb5_principal)calloc(1, sizeof(krb5_principal_data))) | |
2200 | == NULL) | |
2201 | goto err; | |
2202 | new_p->length = 2; | |
2203 | new_p->data = p_data; | |
2204 | ||
2205 | if ((new_r = calloc(1, rlen + 1)) == NULL) | |
2206 | goto err; | |
2207 | memcpy(new_r, realm, rlen); | |
2208 | krb5_princ_set_realm_length(context, new_p, rlen); | |
2209 | krb5_princ_set_realm_data(context, new_p, new_r); | |
2210 | ||
2211 | if ((new_p->data[0].data = calloc(1, slen + 1)) == NULL) | |
2212 | goto err; | |
2213 | memcpy(new_p->data[0].data, svc, slen); | |
2214 | new_p->data[0].length = slen; | |
2215 | ||
2216 | if ((new_p->data[1].data = calloc(1, hlen + 1)) == NULL) | |
2217 | goto err; | |
2218 | memcpy(new_p->data[1].data, host, hlen); | |
2219 | new_p->data[1].length = hlen; | |
2220 | ||
2221 | krb5_princ_type(context, new_p) = KRB5_NT_UNKNOWN; | |
2222 | *princ = new_p; | |
2223 | return 0; | |
2a1ef754 RL |
2224 | |
2225 | err: | |
0f113f3e MC |
2226 | if (new_p && new_p[0].data) |
2227 | free(new_p[0].data); | |
2228 | if (new_p && new_p[1].data) | |
2229 | free(new_p[1].data); | |
2230 | if (new_p) | |
2231 | free(new_p); | |
2232 | if (new_r) | |
2233 | free(new_r); | |
2234 | return ENOMEM; | |
2235 | } | |
2a1ef754 | 2236 | |
4f7a2ab8 | 2237 | void SSL_set0_kssl_ctx(SSL *s, KSSL_CTX *kctx) |
0f113f3e MC |
2238 | { |
2239 | s->kssl_ctx = kctx; | |
2240 | } | |
4f7a2ab8 | 2241 | |
0f113f3e MC |
2242 | KSSL_CTX *SSL_get0_kssl_ctx(SSL *s) |
2243 | { | |
2244 | return s->kssl_ctx; | |
2245 | } | |
4f7a2ab8 DSH |
2246 | |
2247 | char *kssl_ctx_get0_client_princ(KSSL_CTX *kctx) | |
0f113f3e MC |
2248 | { |
2249 | if (kctx) | |
2250 | return kctx->client_princ; | |
2251 | return NULL; | |
2252 | } | |
b0dc680f | 2253 | |
0f113f3e | 2254 | #else /* !OPENSSL_NO_KRB5 */ |
b0dc680f | 2255 | |
0f113f3e MC |
2256 | # if defined(PEDANTIC) || defined(OPENSSL_SYS_VMS) |
2257 | static void *dummy = &dummy; | |
2258 | # endif | |
43fcc1b0 | 2259 | |
0f113f3e | 2260 | #endif /* !OPENSSL_NO_KRB5 */ |