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43fcc1b0 RL |
1 | /* ssl/kssl.c -*- mode: C; c-file-style: "eay" -*- */ |
2 | /* Written by Vern Staats <staatsvr@asc.hpc.mil> for the OpenSSL project 2000. | |
3 | */ | |
4 | /* ==================================================================== | |
5 | * Copyright (c) 2000 The OpenSSL Project. All rights reserved. | |
6 | * | |
7 | * Redistribution and use in source and binary forms, with or without | |
8 | * modification, are permitted provided that the following conditions | |
9 | * are met: | |
10 | * | |
11 | * 1. Redistributions of source code must retain the above copyright | |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in | |
16 | * the documentation and/or other materials provided with the | |
17 | * distribution. | |
18 | * | |
19 | * 3. All advertising materials mentioning features or use of this | |
20 | * software must display the following acknowledgment: | |
21 | * "This product includes software developed by the OpenSSL Project | |
22 | * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" | |
23 | * | |
24 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
25 | * endorse or promote products derived from this software without | |
26 | * prior written permission. For written permission, please contact | |
27 | * licensing@OpenSSL.org. | |
28 | * | |
29 | * 5. Products derived from this software may not be called "OpenSSL" | |
30 | * nor may "OpenSSL" appear in their names without prior written | |
31 | * permission of the OpenSSL Project. | |
32 | * | |
33 | * 6. Redistributions of any form whatsoever must retain the following | |
34 | * acknowledgment: | |
35 | * "This product includes software developed by the OpenSSL Project | |
36 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | |
37 | * | |
38 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
39 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
40 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
41 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
42 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
43 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
44 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
45 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
46 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
47 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
48 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
49 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
50 | * ==================================================================== | |
51 | * | |
52 | * This product includes cryptographic software written by Eric Young | |
53 | * (eay@cryptsoft.com). This product includes software written by Tim | |
54 | * Hudson (tjh@cryptsoft.com). | |
55 | * | |
56 | */ | |
57 | ||
58 | ||
6977c7e2 TH |
59 | /*- |
60 | * ssl/kssl.c -- Routines to support (& debug) Kerberos5 auth for openssl | |
61 | * | |
62 | * 19990701 VRS Started. | |
63 | * 200011?? Jeffrey Altman, Richard Levitte | |
64 | * Generalized for Heimdal, Newer MIT, & Win32. | |
65 | * Integrated into main OpenSSL 0.9.7 snapshots. | |
66 | * 20010413 Simon Wilkinson, VRS | |
67 | * Real RFC2712 KerberosWrapper replaces AP_REQ. | |
68 | */ | |
43fcc1b0 | 69 | |
7bd51947 | 70 | #include <openssl/opensslconf.h> |
116daf4c | 71 | |
7e998124 | 72 | #include <string.h> |
2a1ef754 | 73 | |
0858b71b DSH |
74 | #define KRB5_PRIVATE 1 |
75 | ||
43fcc1b0 | 76 | #include <openssl/ssl.h> |
2a1ef754 RL |
77 | #include <openssl/evp.h> |
78 | #include <openssl/objects.h> | |
79 | #include <openssl/krb5_asn.h> | |
21fb688d | 80 | #include "kssl_lcl.h" |
43fcc1b0 | 81 | |
116daf4c RL |
82 | #ifndef OPENSSL_NO_KRB5 |
83 | ||
0858b71b DSH |
84 | #ifndef ENOMEM |
85 | #define ENOMEM KRB5KRB_ERR_GENERIC | |
86 | #endif | |
87 | ||
f9b3bff6 RL |
88 | /* |
89 | * When OpenSSL is built on Windows, we do not want to require that | |
90 | * the Kerberos DLLs be available in order for the OpenSSL DLLs to | |
91 | * work. Therefore, all Kerberos routines are loaded at run time | |
92 | * and we do not link to a .LIB file. | |
93 | */ | |
94 | ||
bc36ee62 | 95 | #if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32) |
f9b3bff6 RL |
96 | /* |
97 | * The purpose of the following pre-processor statements is to provide | |
98 | * compatibility with different releases of MIT Kerberos for Windows. | |
99 | * All versions up to 1.2 used macros. But macros do not allow for | |
100 | * a binary compatible interface for DLLs. Therefore, all macros are | |
101 | * being replaced by function calls. The following code will allow | |
102 | * an OpenSSL DLL built on Windows to work whether or not the macro | |
103 | * or function form of the routines are utilized. | |
104 | */ | |
105 | #ifdef krb5_cc_get_principal | |
106 | #define NO_DEF_KRB5_CCACHE | |
107 | #undef krb5_cc_get_principal | |
108 | #endif | |
109 | #define krb5_cc_get_principal kssl_krb5_cc_get_principal | |
110 | ||
111 | #define krb5_free_data_contents kssl_krb5_free_data_contents | |
112 | #define krb5_free_context kssl_krb5_free_context | |
113 | #define krb5_auth_con_free kssl_krb5_auth_con_free | |
114 | #define krb5_free_principal kssl_krb5_free_principal | |
115 | #define krb5_mk_req_extended kssl_krb5_mk_req_extended | |
116 | #define krb5_get_credentials kssl_krb5_get_credentials | |
117 | #define krb5_cc_default kssl_krb5_cc_default | |
118 | #define krb5_sname_to_principal kssl_krb5_sname_to_principal | |
119 | #define krb5_init_context kssl_krb5_init_context | |
120 | #define krb5_free_ticket kssl_krb5_free_ticket | |
121 | #define krb5_rd_req kssl_krb5_rd_req | |
122 | #define krb5_kt_default kssl_krb5_kt_default | |
123 | #define krb5_kt_resolve kssl_krb5_kt_resolve | |
47ff5c62 BM |
124 | /* macros in mit 1.2.2 and earlier; functions in mit 1.2.3 and greater */ |
125 | #ifndef krb5_kt_close | |
126 | #define krb5_kt_close kssl_krb5_kt_close | |
127 | #endif /* krb5_kt_close */ | |
128 | #ifndef krb5_kt_get_entry | |
129 | #define krb5_kt_get_entry kssl_krb5_kt_get_entry | |
130 | #endif /* krb5_kt_get_entry */ | |
f9b3bff6 RL |
131 | #define krb5_auth_con_init kssl_krb5_auth_con_init |
132 | ||
2a1ef754 | 133 | #define krb5_principal_compare kssl_krb5_principal_compare |
2a1ef754 RL |
134 | #define krb5_decrypt_tkt_part kssl_krb5_decrypt_tkt_part |
135 | #define krb5_timeofday kssl_krb5_timeofday | |
21fb688d | 136 | #define krb5_rc_default kssl_krb5_rc_default |
cbc9d971 | 137 | |
497810ca DSH |
138 | #ifdef krb5_rc_initialize |
139 | #undef krb5_rc_initialize | |
cbc9d971 | 140 | #endif |
497810ca | 141 | #define krb5_rc_initialize kssl_krb5_rc_initialize |
cbc9d971 | 142 | |
497810ca DSH |
143 | #ifdef krb5_rc_get_lifespan |
144 | #undef krb5_rc_get_lifespan | |
cbc9d971 | 145 | #endif |
497810ca | 146 | #define krb5_rc_get_lifespan kssl_krb5_rc_get_lifespan |
cbc9d971 | 147 | |
497810ca DSH |
148 | #ifdef krb5_rc_destroy |
149 | #undef krb5_rc_destroy | |
cbc9d971 | 150 | #endif |
497810ca | 151 | #define krb5_rc_destroy kssl_krb5_rc_destroy |
cbc9d971 | 152 | |
8de83bf8 RL |
153 | #define valid_cksumtype kssl_valid_cksumtype |
154 | #define krb5_checksum_size kssl_krb5_checksum_size | |
155 | #define krb5_kt_free_entry kssl_krb5_kt_free_entry | |
a5224c34 RL |
156 | #define krb5_auth_con_setrcache kssl_krb5_auth_con_setrcache |
157 | #define krb5_auth_con_getrcache kssl_krb5_auth_con_getrcache | |
158 | #define krb5_get_server_rcache kssl_krb5_get_server_rcache | |
2a1ef754 | 159 | |
f9b3bff6 RL |
160 | /* Prototypes for built in stubs */ |
161 | void kssl_krb5_free_data_contents(krb5_context, krb5_data *); | |
162 | void kssl_krb5_free_principal(krb5_context, krb5_principal ); | |
163 | krb5_error_code kssl_krb5_kt_resolve(krb5_context, | |
164 | krb5_const char *, | |
165 | krb5_keytab *); | |
166 | krb5_error_code kssl_krb5_kt_default(krb5_context, | |
167 | krb5_keytab *); | |
168 | krb5_error_code kssl_krb5_free_ticket(krb5_context, krb5_ticket *); | |
169 | krb5_error_code kssl_krb5_rd_req(krb5_context, krb5_auth_context *, | |
170 | krb5_const krb5_data *, | |
171 | krb5_const_principal, krb5_keytab, | |
172 | krb5_flags *,krb5_ticket **); | |
2a1ef754 RL |
173 | |
174 | krb5_boolean kssl_krb5_principal_compare(krb5_context, krb5_const_principal, | |
175 | krb5_const_principal); | |
f9b3bff6 RL |
176 | krb5_error_code kssl_krb5_mk_req_extended(krb5_context, |
177 | krb5_auth_context *, | |
178 | krb5_const krb5_flags, | |
179 | krb5_data *, | |
180 | krb5_creds *, | |
181 | krb5_data * ); | |
182 | krb5_error_code kssl_krb5_init_context(krb5_context *); | |
183 | void kssl_krb5_free_context(krb5_context); | |
184 | krb5_error_code kssl_krb5_cc_default(krb5_context,krb5_ccache *); | |
185 | krb5_error_code kssl_krb5_sname_to_principal(krb5_context, | |
186 | krb5_const char *, | |
187 | krb5_const char *, | |
188 | krb5_int32, | |
189 | krb5_principal *); | |
190 | krb5_error_code kssl_krb5_get_credentials(krb5_context, | |
191 | krb5_const krb5_flags, | |
192 | krb5_ccache, | |
193 | krb5_creds *, | |
194 | krb5_creds * *); | |
195 | krb5_error_code kssl_krb5_auth_con_init(krb5_context, | |
196 | krb5_auth_context *); | |
197 | krb5_error_code kssl_krb5_cc_get_principal(krb5_context context, | |
198 | krb5_ccache cache, | |
199 | krb5_principal *principal); | |
200 | krb5_error_code kssl_krb5_auth_con_free(krb5_context,krb5_auth_context); | |
8de83bf8 RL |
201 | size_t kssl_krb5_checksum_size(krb5_context context,krb5_cksumtype ctype); |
202 | krb5_boolean kssl_valid_cksumtype(krb5_cksumtype ctype); | |
203 | krb5_error_code krb5_kt_free_entry(krb5_context,krb5_keytab_entry FAR * ); | |
a5224c34 RL |
204 | krb5_error_code kssl_krb5_auth_con_setrcache(krb5_context, |
205 | krb5_auth_context, | |
206 | krb5_rcache); | |
207 | krb5_error_code kssl_krb5_get_server_rcache(krb5_context, | |
208 | krb5_const krb5_data *, | |
209 | krb5_rcache *); | |
210 | krb5_error_code kssl_krb5_auth_con_getrcache(krb5_context, | |
211 | krb5_auth_context, | |
212 | krb5_rcache *); | |
f9b3bff6 RL |
213 | |
214 | /* Function pointers (almost all Kerberos functions are _stdcall) */ | |
2a1ef754 RL |
215 | static void (_stdcall *p_krb5_free_data_contents)(krb5_context, krb5_data *) |
216 | =NULL; | |
217 | static void (_stdcall *p_krb5_free_principal)(krb5_context, krb5_principal ) | |
218 | =NULL; | |
219 | static krb5_error_code(_stdcall *p_krb5_kt_resolve) | |
220 | (krb5_context, krb5_const char *, krb5_keytab *)=NULL; | |
f9b3bff6 RL |
221 | static krb5_error_code (_stdcall *p_krb5_kt_default)(krb5_context, |
222 | krb5_keytab *)=NULL; | |
223 | static krb5_error_code (_stdcall *p_krb5_free_ticket)(krb5_context, | |
224 | krb5_ticket *)=NULL; | |
225 | static krb5_error_code (_stdcall *p_krb5_rd_req)(krb5_context, | |
226 | krb5_auth_context *, | |
227 | krb5_const krb5_data *, | |
228 | krb5_const_principal, | |
229 | krb5_keytab, krb5_flags *, | |
230 | krb5_ticket **)=NULL; | |
2a1ef754 RL |
231 | static krb5_error_code (_stdcall *p_krb5_mk_req_extended) |
232 | (krb5_context, krb5_auth_context *, | |
233 | krb5_const krb5_flags, krb5_data *, krb5_creds *, | |
234 | krb5_data * )=NULL; | |
f9b3bff6 RL |
235 | static krb5_error_code (_stdcall *p_krb5_init_context)(krb5_context *)=NULL; |
236 | static void (_stdcall *p_krb5_free_context)(krb5_context)=NULL; | |
237 | static krb5_error_code (_stdcall *p_krb5_cc_default)(krb5_context, | |
238 | krb5_ccache *)=NULL; | |
2a1ef754 RL |
239 | static krb5_error_code (_stdcall *p_krb5_sname_to_principal) |
240 | (krb5_context, krb5_const char *, krb5_const char *, | |
241 | krb5_int32, krb5_principal *)=NULL; | |
242 | static krb5_error_code (_stdcall *p_krb5_get_credentials) | |
243 | (krb5_context, krb5_const krb5_flags, krb5_ccache, | |
244 | krb5_creds *, krb5_creds **)=NULL; | |
245 | static krb5_error_code (_stdcall *p_krb5_auth_con_init) | |
246 | (krb5_context, krb5_auth_context *)=NULL; | |
247 | static krb5_error_code (_stdcall *p_krb5_cc_get_principal) | |
248 | (krb5_context context, krb5_ccache cache, | |
249 | krb5_principal *principal)=NULL; | |
250 | static krb5_error_code (_stdcall *p_krb5_auth_con_free) | |
251 | (krb5_context, krb5_auth_context)=NULL; | |
8de83bf8 RL |
252 | static krb5_error_code (_stdcall *p_krb5_decrypt_tkt_part) |
253 | (krb5_context, krb5_const krb5_keyblock *, | |
254 | krb5_ticket *)=NULL; | |
255 | static krb5_error_code (_stdcall *p_krb5_timeofday) | |
256 | (krb5_context context, krb5_int32 *timeret)=NULL; | |
257 | static krb5_error_code (_stdcall *p_krb5_rc_default) | |
258 | (krb5_context context, krb5_rcache *rc)=NULL; | |
259 | static krb5_error_code (_stdcall *p_krb5_rc_initialize) | |
260 | (krb5_context context, krb5_rcache rc, | |
261 | krb5_deltat lifespan)=NULL; | |
262 | static krb5_error_code (_stdcall *p_krb5_rc_get_lifespan) | |
263 | (krb5_context context, krb5_rcache rc, | |
264 | krb5_deltat *lifespan)=NULL; | |
265 | static krb5_error_code (_stdcall *p_krb5_rc_destroy) | |
266 | (krb5_context context, krb5_rcache rc)=NULL; | |
267 | static krb5_boolean (_stdcall *p_krb5_principal_compare) | |
268 | (krb5_context, krb5_const_principal, krb5_const_principal)=NULL; | |
269 | static size_t (_stdcall *p_krb5_checksum_size)(krb5_context context,krb5_cksumtype ctype)=NULL; | |
270 | static krb5_boolean (_stdcall *p_valid_cksumtype)(krb5_cksumtype ctype)=NULL; | |
271 | static krb5_error_code (_stdcall *p_krb5_kt_free_entry) | |
272 | (krb5_context,krb5_keytab_entry * )=NULL; | |
a5224c34 RL |
273 | static krb5_error_code (_stdcall * p_krb5_auth_con_setrcache)(krb5_context, |
274 | krb5_auth_context, | |
275 | krb5_rcache)=NULL; | |
276 | static krb5_error_code (_stdcall * p_krb5_get_server_rcache)(krb5_context, | |
277 | krb5_const krb5_data *, | |
278 | krb5_rcache *)=NULL; | |
279 | static krb5_error_code (* p_krb5_auth_con_getrcache)(krb5_context, | |
280 | krb5_auth_context, | |
281 | krb5_rcache *)=NULL; | |
47ff5c62 BM |
282 | static krb5_error_code (_stdcall * p_krb5_kt_close)(krb5_context context, |
283 | krb5_keytab keytab)=NULL; | |
284 | static krb5_error_code (_stdcall * p_krb5_kt_get_entry)(krb5_context context, | |
285 | krb5_keytab keytab, | |
286 | krb5_const_principal principal, krb5_kvno vno, | |
287 | krb5_enctype enctype, krb5_keytab_entry *entry)=NULL; | |
f9b3bff6 RL |
288 | static int krb5_loaded = 0; /* only attempt to initialize func ptrs once */ |
289 | ||
290 | /* Function to Load the Kerberos 5 DLL and initialize function pointers */ | |
291 | void | |
292 | load_krb5_dll(void) | |
293 | { | |
294 | HANDLE hKRB5_32; | |
295 | ||
296 | krb5_loaded++; | |
83e68987 | 297 | hKRB5_32 = LoadLibrary(TEXT("KRB5_32")); |
f9b3bff6 RL |
298 | if (!hKRB5_32) |
299 | return; | |
300 | ||
301 | (FARPROC) p_krb5_free_data_contents = | |
302 | GetProcAddress( hKRB5_32, "krb5_free_data_contents" ); | |
303 | (FARPROC) p_krb5_free_context = | |
304 | GetProcAddress( hKRB5_32, "krb5_free_context" ); | |
305 | (FARPROC) p_krb5_auth_con_free = | |
306 | GetProcAddress( hKRB5_32, "krb5_auth_con_free" ); | |
307 | (FARPROC) p_krb5_free_principal = | |
308 | GetProcAddress( hKRB5_32, "krb5_free_principal" ); | |
309 | (FARPROC) p_krb5_mk_req_extended = | |
310 | GetProcAddress( hKRB5_32, "krb5_mk_req_extended" ); | |
311 | (FARPROC) p_krb5_get_credentials = | |
312 | GetProcAddress( hKRB5_32, "krb5_get_credentials" ); | |
313 | (FARPROC) p_krb5_cc_get_principal = | |
314 | GetProcAddress( hKRB5_32, "krb5_cc_get_principal" ); | |
315 | (FARPROC) p_krb5_cc_default = | |
316 | GetProcAddress( hKRB5_32, "krb5_cc_default" ); | |
317 | (FARPROC) p_krb5_sname_to_principal = | |
318 | GetProcAddress( hKRB5_32, "krb5_sname_to_principal" ); | |
319 | (FARPROC) p_krb5_init_context = | |
320 | GetProcAddress( hKRB5_32, "krb5_init_context" ); | |
321 | (FARPROC) p_krb5_free_ticket = | |
322 | GetProcAddress( hKRB5_32, "krb5_free_ticket" ); | |
323 | (FARPROC) p_krb5_rd_req = | |
324 | GetProcAddress( hKRB5_32, "krb5_rd_req" ); | |
2a1ef754 RL |
325 | (FARPROC) p_krb5_principal_compare = |
326 | GetProcAddress( hKRB5_32, "krb5_principal_compare" ); | |
327 | (FARPROC) p_krb5_decrypt_tkt_part = | |
328 | GetProcAddress( hKRB5_32, "krb5_decrypt_tkt_part" ); | |
329 | (FARPROC) p_krb5_timeofday = | |
330 | GetProcAddress( hKRB5_32, "krb5_timeofday" ); | |
331 | (FARPROC) p_krb5_rc_default = | |
332 | GetProcAddress( hKRB5_32, "krb5_rc_default" ); | |
333 | (FARPROC) p_krb5_rc_initialize = | |
334 | GetProcAddress( hKRB5_32, "krb5_rc_initialize" ); | |
335 | (FARPROC) p_krb5_rc_get_lifespan = | |
336 | GetProcAddress( hKRB5_32, "krb5_rc_get_lifespan" ); | |
337 | (FARPROC) p_krb5_rc_destroy = | |
338 | GetProcAddress( hKRB5_32, "krb5_rc_destroy" ); | |
f9b3bff6 RL |
339 | (FARPROC) p_krb5_kt_default = |
340 | GetProcAddress( hKRB5_32, "krb5_kt_default" ); | |
341 | (FARPROC) p_krb5_kt_resolve = | |
342 | GetProcAddress( hKRB5_32, "krb5_kt_resolve" ); | |
343 | (FARPROC) p_krb5_auth_con_init = | |
344 | GetProcAddress( hKRB5_32, "krb5_auth_con_init" ); | |
8de83bf8 RL |
345 | (FARPROC) p_valid_cksumtype = |
346 | GetProcAddress( hKRB5_32, "valid_cksumtype" ); | |
347 | (FARPROC) p_krb5_checksum_size = | |
348 | GetProcAddress( hKRB5_32, "krb5_checksum_size" ); | |
349 | (FARPROC) p_krb5_kt_free_entry = | |
350 | GetProcAddress( hKRB5_32, "krb5_kt_free_entry" ); | |
a5224c34 RL |
351 | (FARPROC) p_krb5_auth_con_setrcache = |
352 | GetProcAddress( hKRB5_32, "krb5_auth_con_setrcache" ); | |
353 | (FARPROC) p_krb5_get_server_rcache = | |
354 | GetProcAddress( hKRB5_32, "krb5_get_server_rcache" ); | |
355 | (FARPROC) p_krb5_auth_con_getrcache = | |
356 | GetProcAddress( hKRB5_32, "krb5_auth_con_getrcache" ); | |
47ff5c62 BM |
357 | (FARPROC) p_krb5_kt_close = |
358 | GetProcAddress( hKRB5_32, "krb5_kt_close" ); | |
359 | (FARPROC) p_krb5_kt_get_entry = | |
360 | GetProcAddress( hKRB5_32, "krb5_kt_get_entry" ); | |
f9b3bff6 RL |
361 | } |
362 | ||
363 | /* Stubs for each function to be dynamicly loaded */ | |
364 | void | |
365 | kssl_krb5_free_data_contents(krb5_context CO, krb5_data * data) | |
366 | { | |
367 | if (!krb5_loaded) | |
368 | load_krb5_dll(); | |
369 | ||
370 | if ( p_krb5_free_data_contents ) | |
371 | p_krb5_free_data_contents(CO,data); | |
372 | } | |
373 | ||
374 | krb5_error_code | |
375 | kssl_krb5_mk_req_extended (krb5_context CO, | |
376 | krb5_auth_context * pACO, | |
377 | krb5_const krb5_flags F, | |
378 | krb5_data * pD1, | |
379 | krb5_creds * pC, | |
380 | krb5_data * pD2) | |
381 | { | |
382 | if (!krb5_loaded) | |
383 | load_krb5_dll(); | |
384 | ||
385 | if ( p_krb5_mk_req_extended ) | |
386 | return(p_krb5_mk_req_extended(CO,pACO,F,pD1,pC,pD2)); | |
387 | else | |
388 | return KRB5KRB_ERR_GENERIC; | |
389 | } | |
390 | krb5_error_code | |
391 | kssl_krb5_auth_con_init(krb5_context CO, | |
392 | krb5_auth_context * pACO) | |
393 | { | |
394 | if (!krb5_loaded) | |
395 | load_krb5_dll(); | |
396 | ||
397 | if ( p_krb5_auth_con_init ) | |
398 | return(p_krb5_auth_con_init(CO,pACO)); | |
399 | else | |
400 | return KRB5KRB_ERR_GENERIC; | |
401 | } | |
402 | krb5_error_code | |
403 | kssl_krb5_auth_con_free (krb5_context CO, | |
404 | krb5_auth_context ACO) | |
405 | { | |
406 | if (!krb5_loaded) | |
407 | load_krb5_dll(); | |
408 | ||
409 | if ( p_krb5_auth_con_free ) | |
410 | return(p_krb5_auth_con_free(CO,ACO)); | |
411 | else | |
412 | return KRB5KRB_ERR_GENERIC; | |
413 | } | |
414 | krb5_error_code | |
415 | kssl_krb5_get_credentials(krb5_context CO, | |
416 | krb5_const krb5_flags F, | |
417 | krb5_ccache CC, | |
418 | krb5_creds * pCR, | |
419 | krb5_creds ** ppCR) | |
420 | { | |
421 | if (!krb5_loaded) | |
422 | load_krb5_dll(); | |
423 | ||
424 | if ( p_krb5_get_credentials ) | |
425 | return(p_krb5_get_credentials(CO,F,CC,pCR,ppCR)); | |
426 | else | |
427 | return KRB5KRB_ERR_GENERIC; | |
428 | } | |
429 | krb5_error_code | |
430 | kssl_krb5_sname_to_principal(krb5_context CO, | |
431 | krb5_const char * pC1, | |
432 | krb5_const char * pC2, | |
433 | krb5_int32 I, | |
434 | krb5_principal * pPR) | |
435 | { | |
436 | if (!krb5_loaded) | |
437 | load_krb5_dll(); | |
438 | ||
439 | if ( p_krb5_sname_to_principal ) | |
440 | return(p_krb5_sname_to_principal(CO,pC1,pC2,I,pPR)); | |
441 | else | |
442 | return KRB5KRB_ERR_GENERIC; | |
443 | } | |
444 | ||
445 | krb5_error_code | |
446 | kssl_krb5_cc_default(krb5_context CO, | |
447 | krb5_ccache * pCC) | |
448 | { | |
449 | if (!krb5_loaded) | |
450 | load_krb5_dll(); | |
451 | ||
452 | if ( p_krb5_cc_default ) | |
453 | return(p_krb5_cc_default(CO,pCC)); | |
454 | else | |
455 | return KRB5KRB_ERR_GENERIC; | |
456 | } | |
457 | ||
458 | krb5_error_code | |
459 | kssl_krb5_init_context(krb5_context * pCO) | |
460 | { | |
461 | if (!krb5_loaded) | |
462 | load_krb5_dll(); | |
463 | ||
464 | if ( p_krb5_init_context ) | |
465 | return(p_krb5_init_context(pCO)); | |
466 | else | |
467 | return KRB5KRB_ERR_GENERIC; | |
468 | } | |
469 | ||
470 | void | |
471 | kssl_krb5_free_context(krb5_context CO) | |
472 | { | |
473 | if (!krb5_loaded) | |
474 | load_krb5_dll(); | |
475 | ||
476 | if ( p_krb5_free_context ) | |
477 | p_krb5_free_context(CO); | |
478 | } | |
479 | ||
480 | void | |
481 | kssl_krb5_free_principal(krb5_context c, krb5_principal p) | |
482 | { | |
483 | if (!krb5_loaded) | |
484 | load_krb5_dll(); | |
485 | ||
486 | if ( p_krb5_free_principal ) | |
487 | p_krb5_free_principal(c,p); | |
488 | } | |
489 | ||
490 | krb5_error_code | |
491 | kssl_krb5_kt_resolve(krb5_context con, | |
492 | krb5_const char * sz, | |
493 | krb5_keytab * kt) | |
494 | { | |
495 | if (!krb5_loaded) | |
496 | load_krb5_dll(); | |
497 | ||
498 | if ( p_krb5_kt_resolve ) | |
499 | return(p_krb5_kt_resolve(con,sz,kt)); | |
500 | else | |
501 | return KRB5KRB_ERR_GENERIC; | |
502 | } | |
503 | ||
504 | krb5_error_code | |
505 | kssl_krb5_kt_default(krb5_context con, | |
506 | krb5_keytab * kt) | |
507 | { | |
508 | if (!krb5_loaded) | |
509 | load_krb5_dll(); | |
510 | ||
511 | if ( p_krb5_kt_default ) | |
512 | return(p_krb5_kt_default(con,kt)); | |
513 | else | |
514 | return KRB5KRB_ERR_GENERIC; | |
515 | } | |
516 | ||
517 | krb5_error_code | |
518 | kssl_krb5_free_ticket(krb5_context con, | |
519 | krb5_ticket * kt) | |
520 | { | |
521 | if (!krb5_loaded) | |
522 | load_krb5_dll(); | |
523 | ||
524 | if ( p_krb5_free_ticket ) | |
525 | return(p_krb5_free_ticket(con,kt)); | |
526 | else | |
527 | return KRB5KRB_ERR_GENERIC; | |
528 | } | |
529 | ||
530 | krb5_error_code | |
531 | kssl_krb5_rd_req(krb5_context con, krb5_auth_context * pacon, | |
532 | krb5_const krb5_data * data, | |
533 | krb5_const_principal princ, krb5_keytab keytab, | |
534 | krb5_flags * flags, krb5_ticket ** pptkt) | |
535 | { | |
536 | if (!krb5_loaded) | |
537 | load_krb5_dll(); | |
538 | ||
539 | if ( p_krb5_rd_req ) | |
540 | return(p_krb5_rd_req(con,pacon,data,princ,keytab,flags,pptkt)); | |
541 | else | |
542 | return KRB5KRB_ERR_GENERIC; | |
543 | } | |
544 | ||
2a1ef754 RL |
545 | krb5_boolean |
546 | krb5_principal_compare(krb5_context con, krb5_const_principal princ1, | |
547 | krb5_const_principal princ2) | |
548 | { | |
549 | if (!krb5_loaded) | |
550 | load_krb5_dll(); | |
551 | ||
552 | if ( p_krb5_principal_compare ) | |
8de83bf8 | 553 | return(p_krb5_principal_compare(con,princ1,princ2)); |
2a1ef754 RL |
554 | else |
555 | return KRB5KRB_ERR_GENERIC; | |
556 | } | |
557 | ||
558 | krb5_error_code | |
559 | krb5_decrypt_tkt_part(krb5_context con, krb5_const krb5_keyblock *keys, | |
560 | krb5_ticket *ticket) | |
561 | { | |
562 | if (!krb5_loaded) | |
563 | load_krb5_dll(); | |
564 | ||
565 | if ( p_krb5_decrypt_tkt_part ) | |
8de83bf8 | 566 | return(p_krb5_decrypt_tkt_part(con,keys,ticket)); |
2a1ef754 RL |
567 | else |
568 | return KRB5KRB_ERR_GENERIC; | |
569 | } | |
570 | ||
571 | krb5_error_code | |
572 | krb5_timeofday(krb5_context con, krb5_int32 *timeret) | |
573 | { | |
574 | if (!krb5_loaded) | |
575 | load_krb5_dll(); | |
576 | ||
577 | if ( p_krb5_timeofday ) | |
8de83bf8 | 578 | return(p_krb5_timeofday(con,timeret)); |
2a1ef754 RL |
579 | else |
580 | return KRB5KRB_ERR_GENERIC; | |
581 | } | |
582 | ||
583 | krb5_error_code | |
584 | krb5_rc_default(krb5_context con, krb5_rcache *rc) | |
585 | { | |
586 | if (!krb5_loaded) | |
587 | load_krb5_dll(); | |
588 | ||
589 | if ( p_krb5_rc_default ) | |
8de83bf8 | 590 | return(p_krb5_rc_default(con,rc)); |
2a1ef754 RL |
591 | else |
592 | return KRB5KRB_ERR_GENERIC; | |
593 | } | |
594 | ||
595 | krb5_error_code | |
596 | krb5_rc_initialize(krb5_context con, krb5_rcache rc, krb5_deltat lifespan) | |
597 | { | |
598 | if (!krb5_loaded) | |
599 | load_krb5_dll(); | |
600 | ||
601 | if ( p_krb5_rc_initialize ) | |
8de83bf8 | 602 | return(p_krb5_rc_initialize(con, rc, lifespan)); |
2a1ef754 RL |
603 | else |
604 | return KRB5KRB_ERR_GENERIC; | |
605 | } | |
606 | ||
607 | krb5_error_code | |
608 | krb5_rc_get_lifespan(krb5_context con, krb5_rcache rc, krb5_deltat *lifespanp) | |
609 | { | |
610 | if (!krb5_loaded) | |
611 | load_krb5_dll(); | |
612 | ||
613 | if ( p_krb5_rc_get_lifespan ) | |
8de83bf8 | 614 | return(p_krb5_rc_get_lifespan(con, rc, lifespanp)); |
2a1ef754 RL |
615 | else |
616 | return KRB5KRB_ERR_GENERIC; | |
617 | } | |
618 | ||
619 | krb5_error_code | |
620 | krb5_rc_destroy(krb5_context con, krb5_rcache rc) | |
621 | { | |
622 | if (!krb5_loaded) | |
623 | load_krb5_dll(); | |
624 | ||
625 | if ( p_krb5_rc_destroy ) | |
8de83bf8 | 626 | return(p_krb5_rc_destroy(con, rc)); |
2a1ef754 RL |
627 | else |
628 | return KRB5KRB_ERR_GENERIC; | |
629 | } | |
630 | ||
8de83bf8 RL |
631 | size_t |
632 | krb5_checksum_size(krb5_context context,krb5_cksumtype ctype) | |
633 | { | |
634 | if (!krb5_loaded) | |
635 | load_krb5_dll(); | |
636 | ||
637 | if ( p_krb5_checksum_size ) | |
638 | return(p_krb5_checksum_size(context, ctype)); | |
639 | else | |
640 | return KRB5KRB_ERR_GENERIC; | |
641 | } | |
642 | ||
643 | krb5_boolean | |
644 | valid_cksumtype(krb5_cksumtype ctype) | |
645 | { | |
646 | if (!krb5_loaded) | |
647 | load_krb5_dll(); | |
648 | ||
649 | if ( p_valid_cksumtype ) | |
650 | return(p_valid_cksumtype(ctype)); | |
651 | else | |
652 | return KRB5KRB_ERR_GENERIC; | |
653 | } | |
654 | ||
655 | krb5_error_code | |
656 | krb5_kt_free_entry(krb5_context con,krb5_keytab_entry * entry) | |
657 | { | |
658 | if (!krb5_loaded) | |
659 | load_krb5_dll(); | |
660 | ||
661 | if ( p_krb5_kt_free_entry ) | |
662 | return(p_krb5_kt_free_entry(con,entry)); | |
663 | else | |
664 | return KRB5KRB_ERR_GENERIC; | |
665 | } | |
666 | ||
f9b3bff6 RL |
667 | /* Structure definitions */ |
668 | #ifndef NO_DEF_KRB5_CCACHE | |
669 | #ifndef krb5_x | |
670 | #define krb5_x(ptr,args) ((ptr)?((*(ptr)) args):(abort(),1)) | |
671 | #define krb5_xc(ptr,args) ((ptr)?((*(ptr)) args):(abort(),(char*)0)) | |
672 | #endif | |
673 | ||
674 | typedef krb5_pointer krb5_cc_cursor; /* cursor for sequential lookup */ | |
675 | ||
676 | typedef struct _krb5_ccache | |
677 | { | |
678 | krb5_magic magic; | |
679 | struct _krb5_cc_ops FAR *ops; | |
680 | krb5_pointer data; | |
681 | } *krb5_ccache; | |
682 | ||
683 | typedef struct _krb5_cc_ops | |
684 | { | |
685 | krb5_magic magic; | |
686 | char *prefix; | |
2a1ef754 | 687 | char * (KRB5_CALLCONV *get_name) |
8de83bf8 | 688 | (krb5_context, krb5_ccache); |
2a1ef754 | 689 | krb5_error_code (KRB5_CALLCONV *resolve) |
8de83bf8 | 690 | (krb5_context, krb5_ccache *, const char *); |
2a1ef754 | 691 | krb5_error_code (KRB5_CALLCONV *gen_new) |
8de83bf8 | 692 | (krb5_context, krb5_ccache *); |
2a1ef754 | 693 | krb5_error_code (KRB5_CALLCONV *init) |
8de83bf8 | 694 | (krb5_context, krb5_ccache, krb5_principal); |
2a1ef754 | 695 | krb5_error_code (KRB5_CALLCONV *destroy) |
8de83bf8 | 696 | (krb5_context, krb5_ccache); |
2a1ef754 | 697 | krb5_error_code (KRB5_CALLCONV *close) |
8de83bf8 | 698 | (krb5_context, krb5_ccache); |
2a1ef754 | 699 | krb5_error_code (KRB5_CALLCONV *store) |
8de83bf8 | 700 | (krb5_context, krb5_ccache, krb5_creds *); |
2a1ef754 | 701 | krb5_error_code (KRB5_CALLCONV *retrieve) |
8de83bf8 RL |
702 | (krb5_context, krb5_ccache, |
703 | krb5_flags, krb5_creds *, krb5_creds *); | |
2a1ef754 | 704 | krb5_error_code (KRB5_CALLCONV *get_princ) |
8de83bf8 | 705 | (krb5_context, krb5_ccache, krb5_principal *); |
2a1ef754 | 706 | krb5_error_code (KRB5_CALLCONV *get_first) |
8de83bf8 | 707 | (krb5_context, krb5_ccache, krb5_cc_cursor *); |
2a1ef754 | 708 | krb5_error_code (KRB5_CALLCONV *get_next) |
8de83bf8 RL |
709 | (krb5_context, krb5_ccache, |
710 | krb5_cc_cursor *, krb5_creds *); | |
2a1ef754 | 711 | krb5_error_code (KRB5_CALLCONV *end_get) |
8de83bf8 | 712 | (krb5_context, krb5_ccache, krb5_cc_cursor *); |
2a1ef754 | 713 | krb5_error_code (KRB5_CALLCONV *remove_cred) |
8de83bf8 RL |
714 | (krb5_context, krb5_ccache, |
715 | krb5_flags, krb5_creds *); | |
2a1ef754 | 716 | krb5_error_code (KRB5_CALLCONV *set_flags) |
8de83bf8 | 717 | (krb5_context, krb5_ccache, krb5_flags); |
f9b3bff6 RL |
718 | } krb5_cc_ops; |
719 | #endif /* NO_DEF_KRB5_CCACHE */ | |
720 | ||
721 | krb5_error_code | |
722 | kssl_krb5_cc_get_principal | |
723 | (krb5_context context, krb5_ccache cache, | |
724 | krb5_principal *principal) | |
725 | { | |
726 | if ( p_krb5_cc_get_principal ) | |
727 | return(p_krb5_cc_get_principal(context,cache,principal)); | |
728 | else | |
2a1ef754 RL |
729 | return(krb5_x |
730 | ((cache)->ops->get_princ,(context, cache, principal))); | |
f9b3bff6 | 731 | } |
a5224c34 RL |
732 | |
733 | krb5_error_code | |
734 | kssl_krb5_auth_con_setrcache(krb5_context con, krb5_auth_context acon, | |
735 | krb5_rcache rcache) | |
736 | { | |
737 | if ( p_krb5_auth_con_setrcache ) | |
738 | return(p_krb5_auth_con_setrcache(con,acon,rcache)); | |
739 | else | |
740 | return KRB5KRB_ERR_GENERIC; | |
741 | } | |
742 | ||
743 | krb5_error_code | |
744 | kssl_krb5_get_server_rcache(krb5_context con, krb5_const krb5_data * data, | |
745 | krb5_rcache * rcache) | |
746 | { | |
47ff5c62 BM |
747 | if ( p_krb5_get_server_rcache ) |
748 | return(p_krb5_get_server_rcache(con,data,rcache)); | |
749 | else | |
750 | return KRB5KRB_ERR_GENERIC; | |
a5224c34 RL |
751 | } |
752 | ||
753 | krb5_error_code | |
754 | kssl_krb5_auth_con_getrcache(krb5_context con, krb5_auth_context acon, | |
755 | krb5_rcache * prcache) | |
756 | { | |
47ff5c62 BM |
757 | if ( p_krb5_auth_con_getrcache ) |
758 | return(p_krb5_auth_con_getrcache(con,acon, prcache)); | |
759 | else | |
760 | return KRB5KRB_ERR_GENERIC; | |
761 | } | |
762 | ||
763 | krb5_error_code | |
764 | kssl_krb5_kt_close(krb5_context context, krb5_keytab keytab) | |
765 | { | |
766 | if ( p_krb5_kt_close ) | |
767 | return(p_krb5_kt_close(context,keytab)); | |
768 | else | |
769 | return KRB5KRB_ERR_GENERIC; | |
770 | } | |
771 | ||
772 | krb5_error_code | |
773 | kssl_krb5_kt_get_entry(krb5_context context, krb5_keytab keytab, | |
774 | krb5_const_principal principal, krb5_kvno vno, | |
775 | krb5_enctype enctype, krb5_keytab_entry *entry) | |
776 | { | |
777 | if ( p_krb5_kt_get_entry ) | |
778 | return(p_krb5_kt_get_entry(context,keytab,principal,vno,enctype,entry)); | |
779 | else | |
780 | return KRB5KRB_ERR_GENERIC; | |
a5224c34 | 781 | } |
bc36ee62 | 782 | #endif /* OPENSSL_SYS_WINDOWS || OPENSSL_SYS_WIN32 */ |
f9b3bff6 | 783 | |
15780a1e NL |
784 | |
785 | /* memory allocation functions for non-temporary storage | |
786 | * (e.g. stuff that gets saved into the kssl context) */ | |
787 | static void* kssl_calloc(size_t nmemb, size_t size) | |
788 | { | |
789 | void* p; | |
790 | ||
791 | p=OPENSSL_malloc(nmemb*size); | |
792 | if (p){ | |
793 | memset(p, 0, nmemb*size); | |
794 | } | |
795 | return p; | |
796 | } | |
797 | ||
798 | #define kssl_malloc(size) OPENSSL_malloc((size)) | |
799 | #define kssl_realloc(ptr, size) OPENSSL_realloc(ptr, size) | |
800 | #define kssl_free(ptr) OPENSSL_free((ptr)) | |
801 | ||
802 | ||
43fcc1b0 RL |
803 | char |
804 | *kstring(char *string) | |
805 | { | |
806 | static char *null = "[NULL]"; | |
807 | ||
808 | return ((string == NULL)? null: string); | |
809 | } | |
810 | ||
acdf4afb | 811 | /* Given KRB5 enctype (basically DES or 3DES), |
6977c7e2 TH |
812 | * return closest match openssl EVP_ encryption algorithm. |
813 | * Return NULL for unknown or problematic (krb5_dk_encrypt) enctypes. | |
814 | * Assume ENCTYPE_*_RAW (krb5_raw_encrypt) are OK. | |
815 | */ | |
0b4c91c0 | 816 | const EVP_CIPHER * |
2a1ef754 RL |
817 | kssl_map_enc(krb5_enctype enctype) |
818 | { | |
819 | switch (enctype) | |
820 | { | |
acdf4afb | 821 | case ENCTYPE_DES_HMAC_SHA1: /* EVP_des_cbc(); */ |
2a1ef754 RL |
822 | case ENCTYPE_DES_CBC_CRC: |
823 | case ENCTYPE_DES_CBC_MD4: | |
824 | case ENCTYPE_DES_CBC_MD5: | |
825 | case ENCTYPE_DES_CBC_RAW: | |
0b4c91c0 | 826 | return EVP_des_cbc(); |
2a1ef754 | 827 | break; |
882e8912 | 828 | case ENCTYPE_DES3_CBC_SHA1: /* EVP_des_ede3_cbc(); */ |
2a1ef754 RL |
829 | case ENCTYPE_DES3_CBC_SHA: |
830 | case ENCTYPE_DES3_CBC_RAW: | |
0b4c91c0 | 831 | return EVP_des_ede3_cbc(); |
2a1ef754 | 832 | break; |
0b4c91c0 | 833 | default: return NULL; |
2a1ef754 RL |
834 | break; |
835 | } | |
836 | } | |
837 | ||
838 | ||
839 | /* Return true:1 if p "looks like" the start of the real authenticator | |
6977c7e2 TH |
840 | * described in kssl_skip_confound() below. The ASN.1 pattern is |
841 | * "62 xx 30 yy" (APPLICATION-2, SEQUENCE), where xx-yy =~ 2, and | |
842 | * xx and yy are possibly multi-byte length fields. | |
843 | */ | |
21fb688d | 844 | static int kssl_test_confound(unsigned char *p) |
2a1ef754 RL |
845 | { |
846 | int len = 2; | |
847 | int xx = 0, yy = 0; | |
848 | ||
849 | if (*p++ != 0x62) return 0; | |
850 | if (*p > 0x82) return 0; | |
851 | switch(*p) { | |
852 | case 0x82: p++; xx = (*p++ << 8); xx += *p++; break; | |
853 | case 0x81: p++; xx = *p++; break; | |
854 | case 0x80: return 0; | |
855 | default: xx = *p++; break; | |
856 | } | |
857 | if (*p++ != 0x30) return 0; | |
858 | if (*p > 0x82) return 0; | |
859 | switch(*p) { | |
860 | case 0x82: p++; len+=2; yy = (*p++ << 8); yy += *p++; break; | |
861 | case 0x81: p++; len++; yy = *p++; break; | |
862 | case 0x80: return 0; | |
863 | default: yy = *p++; break; | |
864 | } | |
865 | ||
866 | return (xx - len == yy)? 1: 0; | |
867 | } | |
868 | ||
869 | /* Allocate, fill, and return cksumlens array of checksum lengths. | |
6977c7e2 TH |
870 | * This array holds just the unique elements from the krb5_cksumarray[]. |
871 | * array[n] == 0 signals end of data. | |
872 | * | |
873 | * The krb5_cksumarray[] was an internal variable that has since been | |
874 | * replaced by a more general method for storing the data. It should | |
875 | * not be used. Instead we use real API calls and make a guess for | |
876 | * what the highest assigned CKSUMTYPE_ constant is. As of 1.2.2 | |
877 | * it is 0x000c (CKSUMTYPE_HMAC_SHA1_DES3). So we will use 0x0010. | |
878 | */ | |
21fb688d | 879 | static size_t *populate_cksumlens(void) |
2a1ef754 | 880 | { |
acdf4afb | 881 | int i, j, n; |
8de83bf8 | 882 | static size_t *cklens = NULL; |
2a1ef754 | 883 | |
acdf4afb RL |
884 | #ifdef KRB5_MIT_OLD11 |
885 | n = krb5_max_cksum; | |
886 | #else | |
887 | n = 0x0010; | |
888 | #endif /* KRB5_MIT_OLD11 */ | |
889 | ||
2a1ef754 | 890 | #ifdef KRB5CHECKAUTH |
acdf4afb | 891 | if (!cklens && !(cklens = (size_t *) calloc(sizeof(int),n+1))) return NULL; |
2a1ef754 | 892 | |
8de83bf8 RL |
893 | for (i=0; i < n; i++) { |
894 | if (!valid_cksumtype(i)) continue; /* array has holes */ | |
895 | for (j=0; j < n; j++) { | |
2a1ef754 | 896 | if (cklens[j] == 0) { |
8de83bf8 | 897 | cklens[j] = krb5_checksum_size(NULL,i); |
2a1ef754 RL |
898 | break; /* krb5 elem was new: add */ |
899 | } | |
8de83bf8 | 900 | if (cklens[j] == krb5_checksum_size(NULL,i)) { |
2a1ef754 RL |
901 | break; /* ignore duplicate elements */ |
902 | } | |
903 | } | |
904 | } | |
905 | #endif /* KRB5CHECKAUTH */ | |
906 | ||
907 | return cklens; | |
908 | } | |
909 | ||
910 | /* Return pointer to start of real authenticator within authenticator, or | |
6977c7e2 TH |
911 | * return NULL on error. |
912 | * Decrypted authenticator looks like this: | |
913 | * [0 or 8 byte confounder] [4-24 byte checksum] [real authent'r] | |
914 | * This hackery wouldn't be necessary if MIT KRB5 1.0.6 had the | |
915 | * krb5_auth_con_getcksumtype() function advertised in its krb5.h. | |
916 | */ | |
2a1ef754 RL |
917 | unsigned char *kssl_skip_confound(krb5_enctype etype, unsigned char *a) |
918 | { | |
fdc2bbca RL |
919 | int i, conlen; |
920 | size_t cklen; | |
921 | static size_t *cksumlens = NULL; | |
2a1ef754 RL |
922 | unsigned char *test_auth; |
923 | ||
924 | conlen = (etype)? 8: 0; | |
925 | ||
926 | if (!cksumlens && !(cksumlens = populate_cksumlens())) return NULL; | |
927 | for (i=0; (cklen = cksumlens[i]) != 0; i++) | |
928 | { | |
929 | test_auth = a + conlen + cklen; | |
930 | if (kssl_test_confound(test_auth)) return test_auth; | |
931 | } | |
932 | ||
933 | return NULL; | |
934 | } | |
935 | ||
936 | ||
43fcc1b0 | 937 | /* Set kssl_err error info when reason text is a simple string |
6977c7e2 TH |
938 | * kssl_err = struct { int reason; char text[KSSL_ERR_MAX+1]; } |
939 | */ | |
43fcc1b0 RL |
940 | void |
941 | kssl_err_set(KSSL_ERR *kssl_err, int reason, char *text) | |
942 | { | |
943 | if (kssl_err == NULL) return; | |
944 | ||
945 | kssl_err->reason = reason; | |
477fd459 | 946 | BIO_snprintf(kssl_err->text, KSSL_ERR_MAX, "%s", text); |
43fcc1b0 RL |
947 | return; |
948 | } | |
949 | ||
950 | ||
951 | /* Display contents of krb5_data struct, for debugging | |
952 | */ | |
953 | void | |
954 | print_krb5_data(char *label, krb5_data *kdata) | |
955 | { | |
cbc9d971 | 956 | int i; |
43fcc1b0 | 957 | |
53332a75 | 958 | fprintf(stderr,"%s[%d] ", label, kdata->length); |
0858b71b | 959 | for (i=0; i < (int)kdata->length; i++) |
43fcc1b0 | 960 | { |
2a1ef754 | 961 | if (0 && isprint((int) kdata->data[i])) |
53332a75 | 962 | fprintf(stderr, "%c ", kdata->data[i]); |
43fcc1b0 | 963 | else |
53332a75 | 964 | fprintf(stderr, "%02x ", (unsigned char) kdata->data[i]); |
43fcc1b0 | 965 | } |
53332a75 | 966 | fprintf(stderr,"\n"); |
43fcc1b0 RL |
967 | } |
968 | ||
969 | ||
970 | /* Display contents of krb5_authdata struct, for debugging | |
971 | */ | |
972 | void | |
973 | print_krb5_authdata(char *label, krb5_authdata **adata) | |
974 | { | |
975 | if (adata == NULL) | |
976 | { | |
53332a75 | 977 | fprintf(stderr,"%s, authdata==0\n", label); |
43fcc1b0 RL |
978 | return; |
979 | } | |
53332a75 | 980 | fprintf(stderr,"%s [%p]\n", label, (void *)adata); |
43fcc1b0 RL |
981 | #if 0 |
982 | { | |
983 | int i; | |
53332a75 | 984 | fprintf(stderr,"%s[at%d:%d] ", label, adata->ad_type, adata->length); |
43fcc1b0 RL |
985 | for (i=0; i < adata->length; i++) |
986 | { | |
53332a75 | 987 | fprintf(stderr,(isprint(adata->contents[i]))? "%c ": "%02x", |
43fcc1b0 RL |
988 | adata->contents[i]); |
989 | } | |
53332a75 | 990 | fprintf(stderr,"\n"); |
43fcc1b0 RL |
991 | } |
992 | #endif | |
f9b3bff6 | 993 | } |
43fcc1b0 RL |
994 | |
995 | ||
996 | /* Display contents of krb5_keyblock struct, for debugging | |
997 | */ | |
998 | void | |
999 | print_krb5_keyblock(char *label, krb5_keyblock *keyblk) | |
1000 | { | |
cbc9d971 | 1001 | int i; |
43fcc1b0 RL |
1002 | |
1003 | if (keyblk == NULL) | |
1004 | { | |
53332a75 | 1005 | fprintf(stderr,"%s, keyblk==0\n", label); |
43fcc1b0 RL |
1006 | return; |
1007 | } | |
f9b3bff6 | 1008 | #ifdef KRB5_HEIMDAL |
53332a75 | 1009 | fprintf(stderr,"%s\n\t[et%d:%d]: ", label, keyblk->keytype, |
2a1ef754 | 1010 | keyblk->keyvalue->length); |
0858b71b | 1011 | for (i=0; i < (int)keyblk->keyvalue->length; i++) |
f9b3bff6 | 1012 | { |
53332a75 | 1013 | fprintf(stderr,"%02x",(unsigned char *)(keyblk->keyvalue->contents)[i]); |
f9b3bff6 | 1014 | } |
53332a75 | 1015 | fprintf(stderr,"\n"); |
f9b3bff6 | 1016 | #else |
53332a75 | 1017 | fprintf(stderr,"%s\n\t[et%d:%d]: ", label, keyblk->enctype, keyblk->length); |
0858b71b | 1018 | for (i=0; i < (int)keyblk->length; i++) |
43fcc1b0 | 1019 | { |
53332a75 | 1020 | fprintf(stderr,"%02x",keyblk->contents[i]); |
43fcc1b0 | 1021 | } |
53332a75 | 1022 | fprintf(stderr,"\n"); |
f9b3bff6 | 1023 | #endif |
43fcc1b0 RL |
1024 | } |
1025 | ||
1026 | ||
2a1ef754 | 1027 | /* Display contents of krb5_principal_data struct, for debugging |
6977c7e2 TH |
1028 | * (krb5_principal is typedef'd == krb5_principal_data *) |
1029 | */ | |
21fb688d | 1030 | static void |
2a1ef754 RL |
1031 | print_krb5_princ(char *label, krb5_principal_data *princ) |
1032 | { | |
cbc9d971 | 1033 | int i, ui, uj; |
2a1ef754 | 1034 | |
53332a75 | 1035 | fprintf(stderr,"%s principal Realm: ", label); |
2a1ef754 | 1036 | if (princ == NULL) return; |
0858b71b | 1037 | for (ui=0; ui < (int)princ->realm.length; ui++) putchar(princ->realm.data[ui]); |
53332a75 | 1038 | fprintf(stderr," (nametype %d) has %d strings:\n", princ->type,princ->length); |
0858b71b | 1039 | for (i=0; i < (int)princ->length; i++) |
2a1ef754 | 1040 | { |
53332a75 | 1041 | fprintf(stderr,"\t%d [%d]: ", i, princ->data[i].length); |
0858b71b | 1042 | for (uj=0; uj < (int)princ->data[i].length; uj++) { |
8de83bf8 | 1043 | putchar(princ->data[i].data[uj]); |
2a1ef754 | 1044 | } |
53332a75 | 1045 | fprintf(stderr,"\n"); |
2a1ef754 RL |
1046 | } |
1047 | return; | |
1048 | } | |
1049 | ||
1050 | ||
6977c7e2 TH |
1051 | /*- Given krb5 service (typically "kssl") and hostname in kssl_ctx, |
1052 | * Return encrypted Kerberos ticket for service @ hostname. | |
1053 | * If authenp is non-NULL, also return encrypted authenticator, | |
1054 | * whose data should be freed by caller. | |
1055 | * (Originally was: Create Kerberos AP_REQ message for SSL Client.) | |
1056 | * | |
1057 | * 19990628 VRS Started; Returns Kerberos AP_REQ message. | |
1058 | * 20010409 VRS Modified for RFC2712; Returns enc tkt. | |
1059 | * 20010606 VRS May also return optional authenticator. | |
1060 | */ | |
43fcc1b0 RL |
1061 | krb5_error_code |
1062 | kssl_cget_tkt( /* UPDATE */ KSSL_CTX *kssl_ctx, | |
2a1ef754 RL |
1063 | /* OUT */ krb5_data **enc_ticketp, |
1064 | /* UPDATE */ krb5_data *authenp, | |
1065 | /* OUT */ KSSL_ERR *kssl_err) | |
f9b3bff6 | 1066 | { |
43fcc1b0 RL |
1067 | krb5_error_code krb5rc = KRB5KRB_ERR_GENERIC; |
1068 | krb5_context krb5context = NULL; | |
1069 | krb5_auth_context krb5auth_context = NULL; | |
1070 | krb5_ccache krb5ccdef = NULL; | |
1071 | krb5_creds krb5creds, *krb5credsp = NULL; | |
2a1ef754 | 1072 | krb5_data krb5_app_req; |
43fcc1b0 RL |
1073 | |
1074 | kssl_err_set(kssl_err, 0, ""); | |
1075 | memset((char *)&krb5creds, 0, sizeof(krb5creds)); | |
1076 | ||
1077 | if (!kssl_ctx) | |
1078 | { | |
1079 | kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, | |
1080 | "No kssl_ctx defined.\n"); | |
1081 | goto err; | |
1082 | } | |
1083 | else if (!kssl_ctx->service_host) | |
1084 | { | |
1085 | kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, | |
1086 | "kssl_ctx service_host undefined.\n"); | |
1087 | goto err; | |
1088 | } | |
1089 | ||
1090 | if ((krb5rc = krb5_init_context(&krb5context)) != 0) | |
1091 | { | |
1092 | BIO_snprintf(kssl_err->text,KSSL_ERR_MAX, | |
1093 | "krb5_init_context() fails: %d\n", krb5rc); | |
1094 | kssl_err->reason = SSL_R_KRB5_C_INIT; | |
1095 | goto err; | |
1096 | } | |
1097 | ||
1098 | if ((krb5rc = krb5_sname_to_principal(krb5context, | |
1099 | kssl_ctx->service_host, | |
1100 | (kssl_ctx->service_name)? kssl_ctx->service_name: KRB5SVC, | |
1101 | KRB5_NT_SRV_HST, &krb5creds.server)) != 0) | |
1102 | { | |
1103 | BIO_snprintf(kssl_err->text,KSSL_ERR_MAX, | |
1104 | "krb5_sname_to_principal() fails for %s/%s\n", | |
1105 | kssl_ctx->service_host, | |
2a1ef754 RL |
1106 | (kssl_ctx->service_name)? kssl_ctx->service_name: |
1107 | KRB5SVC); | |
43fcc1b0 RL |
1108 | kssl_err->reason = SSL_R_KRB5_C_INIT; |
1109 | goto err; | |
1110 | } | |
1111 | ||
1112 | if ((krb5rc = krb5_cc_default(krb5context, &krb5ccdef)) != 0) | |
1113 | { | |
1114 | kssl_err_set(kssl_err, SSL_R_KRB5_C_CC_PRINC, | |
1115 | "krb5_cc_default fails.\n"); | |
1116 | goto err; | |
1117 | } | |
1118 | ||
1119 | if ((krb5rc = krb5_cc_get_principal(krb5context, krb5ccdef, | |
1120 | &krb5creds.client)) != 0) | |
1121 | { | |
1122 | kssl_err_set(kssl_err, SSL_R_KRB5_C_CC_PRINC, | |
1123 | "krb5_cc_get_principal() fails.\n"); | |
1124 | goto err; | |
1125 | } | |
1126 | ||
1127 | if ((krb5rc = krb5_get_credentials(krb5context, 0, krb5ccdef, | |
1128 | &krb5creds, &krb5credsp)) != 0) | |
1129 | { | |
1130 | kssl_err_set(kssl_err, SSL_R_KRB5_C_GET_CRED, | |
1131 | "krb5_get_credentials() fails.\n"); | |
1132 | goto err; | |
1133 | } | |
1134 | ||
2a1ef754 RL |
1135 | *enc_ticketp = &krb5credsp->ticket; |
1136 | #ifdef KRB5_HEIMDAL | |
1137 | kssl_ctx->enctype = krb5credsp->session.keytype; | |
1138 | #else | |
1139 | kssl_ctx->enctype = krb5credsp->keyblock.enctype; | |
1140 | #endif | |
43fcc1b0 RL |
1141 | |
1142 | krb5rc = KRB5KRB_ERR_GENERIC; | |
1143 | /* caller should free data of krb5_app_req */ | |
2a1ef754 | 1144 | /* 20010406 VRS deleted for real KerberosWrapper |
6977c7e2 TH |
1145 | * 20010605 VRS reinstated to offer Authenticator to KerberosWrapper |
1146 | */ | |
2a1ef754 RL |
1147 | krb5_app_req.length = 0; |
1148 | if (authenp) | |
43fcc1b0 | 1149 | { |
2a1ef754 | 1150 | krb5_data krb5in_data; |
384dba6e | 1151 | const unsigned char *p; |
2a1ef754 RL |
1152 | long arlen; |
1153 | KRB5_APREQBODY *ap_req; | |
1154 | ||
1155 | authenp->length = 0; | |
1156 | krb5in_data.data = NULL; | |
1157 | krb5in_data.length = 0; | |
1158 | if ((krb5rc = krb5_mk_req_extended(krb5context, | |
1159 | &krb5auth_context, 0, &krb5in_data, krb5credsp, | |
1160 | &krb5_app_req)) != 0) | |
1161 | { | |
1162 | kssl_err_set(kssl_err, SSL_R_KRB5_C_MK_REQ, | |
1163 | "krb5_mk_req_extended() fails.\n"); | |
1164 | goto err; | |
1165 | } | |
1166 | ||
1167 | arlen = krb5_app_req.length; | |
fdc2bbca | 1168 | p = (unsigned char *)krb5_app_req.data; |
2a1ef754 RL |
1169 | ap_req = (KRB5_APREQBODY *) d2i_KRB5_APREQ(NULL, &p, arlen); |
1170 | if (ap_req) | |
1171 | { | |
1172 | authenp->length = i2d_KRB5_ENCDATA( | |
1173 | ap_req->authenticator, NULL); | |
1174 | if (authenp->length && | |
1175 | (authenp->data = malloc(authenp->length))) | |
1176 | { | |
fdc2bbca | 1177 | unsigned char *adp = (unsigned char *)authenp->data; |
2a1ef754 | 1178 | authenp->length = i2d_KRB5_ENCDATA( |
fdc2bbca | 1179 | ap_req->authenticator, &adp); |
2a1ef754 RL |
1180 | } |
1181 | } | |
1182 | ||
1183 | if (ap_req) KRB5_APREQ_free((KRB5_APREQ *) ap_req); | |
8de83bf8 | 1184 | if (krb5_app_req.length) |
a5224c34 | 1185 | kssl_krb5_free_data_contents(krb5context,&krb5_app_req); |
43fcc1b0 | 1186 | } |
f9b3bff6 | 1187 | #ifdef KRB5_HEIMDAL |
2a1ef754 | 1188 | if (kssl_ctx_setkey(kssl_ctx, &krb5credsp->session)) |
f9b3bff6 RL |
1189 | { |
1190 | kssl_err_set(kssl_err, SSL_R_KRB5_C_INIT, | |
1191 | "kssl_ctx_setkey() fails.\n"); | |
1192 | } | |
1193 | #else | |
2a1ef754 | 1194 | if (kssl_ctx_setkey(kssl_ctx, &krb5credsp->keyblock)) |
43fcc1b0 RL |
1195 | { |
1196 | kssl_err_set(kssl_err, SSL_R_KRB5_C_INIT, | |
1197 | "kssl_ctx_setkey() fails.\n"); | |
1198 | } | |
f9b3bff6 | 1199 | #endif |
43fcc1b0 RL |
1200 | else krb5rc = 0; |
1201 | ||
1202 | err: | |
1203 | #ifdef KSSL_DEBUG | |
1204 | kssl_ctx_show(kssl_ctx); | |
1205 | #endif /* KSSL_DEBUG */ | |
1206 | ||
2a1ef754 RL |
1207 | if (krb5creds.client) krb5_free_principal(krb5context, |
1208 | krb5creds.client); | |
1209 | if (krb5creds.server) krb5_free_principal(krb5context, | |
1210 | krb5creds.server); | |
1211 | if (krb5auth_context) krb5_auth_con_free(krb5context, | |
1212 | krb5auth_context); | |
43fcc1b0 RL |
1213 | if (krb5context) krb5_free_context(krb5context); |
1214 | return (krb5rc); | |
f9b3bff6 | 1215 | } |
43fcc1b0 RL |
1216 | |
1217 | ||
6977c7e2 TH |
1218 | /*- |
1219 | * Given d2i_-decoded asn1ticket, allocate and return a new krb5_ticket. | |
1220 | * Return Kerberos error code and kssl_err struct on error. | |
1221 | * Allocates krb5_ticket and krb5_principal; caller should free these. | |
1222 | * | |
1223 | * 20010410 VRS Implemented krb5_decode_ticket() as | |
1224 | * old_krb5_decode_ticket(). Missing from MIT1.0.6. | |
1225 | * 20010615 VRS Re-cast as openssl/asn1 d2i_*() functions. | |
1226 | * Re-used some of the old krb5_decode_ticket() | |
1227 | * code here. This tkt should alloc/free just | |
1228 | * like the real thing. | |
1229 | */ | |
21fb688d | 1230 | static krb5_error_code |
2a1ef754 RL |
1231 | kssl_TKT2tkt( /* IN */ krb5_context krb5context, |
1232 | /* IN */ KRB5_TKTBODY *asn1ticket, | |
1233 | /* OUT */ krb5_ticket **krb5ticket, | |
1234 | /* OUT */ KSSL_ERR *kssl_err ) | |
1235 | { | |
1236 | krb5_error_code krb5rc = KRB5KRB_ERR_GENERIC; | |
1237 | krb5_ticket *new5ticket = NULL; | |
1238 | ASN1_GENERALSTRING *gstr_svc, *gstr_host; | |
1239 | ||
1240 | *krb5ticket = NULL; | |
1241 | ||
1242 | if (asn1ticket == NULL || asn1ticket->realm == NULL || | |
1243 | asn1ticket->sname == NULL || | |
0b4c91c0 | 1244 | sk_ASN1_GENERALSTRING_num(asn1ticket->sname->namestring) < 2) |
2a1ef754 RL |
1245 | { |
1246 | BIO_snprintf(kssl_err->text, KSSL_ERR_MAX, | |
1247 | "Null field in asn1ticket.\n"); | |
1248 | kssl_err->reason = SSL_R_KRB5_S_RD_REQ; | |
1249 | return KRB5KRB_ERR_GENERIC; | |
1250 | } | |
1251 | ||
1252 | if ((new5ticket = (krb5_ticket *) calloc(1, sizeof(krb5_ticket)))==NULL) | |
1253 | { | |
1254 | BIO_snprintf(kssl_err->text, KSSL_ERR_MAX, | |
1255 | "Unable to allocate new krb5_ticket.\n"); | |
1256 | kssl_err->reason = SSL_R_KRB5_S_RD_REQ; | |
1257 | return ENOMEM; /* or KRB5KRB_ERR_GENERIC; */ | |
1258 | } | |
1259 | ||
0b4c91c0 DSH |
1260 | gstr_svc = sk_ASN1_GENERALSTRING_value(asn1ticket->sname->namestring, 0); |
1261 | gstr_host = sk_ASN1_GENERALSTRING_value(asn1ticket->sname->namestring, 1); | |
2a1ef754 RL |
1262 | |
1263 | if ((krb5rc = kssl_build_principal_2(krb5context, | |
1264 | &new5ticket->server, | |
0b4c91c0 DSH |
1265 | asn1ticket->realm->length, (char *)asn1ticket->realm->data, |
1266 | gstr_svc->length, (char *)gstr_svc->data, | |
1267 | gstr_host->length, (char *)gstr_host->data)) != 0) | |
2a1ef754 RL |
1268 | { |
1269 | free(new5ticket); | |
1270 | BIO_snprintf(kssl_err->text, KSSL_ERR_MAX, | |
1271 | "Error building ticket server principal.\n"); | |
1272 | kssl_err->reason = SSL_R_KRB5_S_RD_REQ; | |
1273 | return krb5rc; /* or KRB5KRB_ERR_GENERIC; */ | |
1274 | } | |
1275 | ||
1276 | krb5_princ_type(krb5context, new5ticket->server) = | |
1277 | asn1ticket->sname->nametype->data[0]; | |
1278 | new5ticket->enc_part.enctype = asn1ticket->encdata->etype->data[0]; | |
1279 | new5ticket->enc_part.kvno = asn1ticket->encdata->kvno->data[0]; | |
1280 | new5ticket->enc_part.ciphertext.length = | |
1281 | asn1ticket->encdata->cipher->length; | |
1282 | if ((new5ticket->enc_part.ciphertext.data = | |
1283 | calloc(1, asn1ticket->encdata->cipher->length)) == NULL) | |
1284 | { | |
1285 | free(new5ticket); | |
1286 | BIO_snprintf(kssl_err->text, KSSL_ERR_MAX, | |
1287 | "Error allocating cipher in krb5ticket.\n"); | |
1288 | kssl_err->reason = SSL_R_KRB5_S_RD_REQ; | |
1289 | return KRB5KRB_ERR_GENERIC; | |
1290 | } | |
1291 | else | |
1292 | { | |
1293 | memcpy(new5ticket->enc_part.ciphertext.data, | |
1294 | asn1ticket->encdata->cipher->data, | |
1295 | asn1ticket->encdata->cipher->length); | |
1296 | } | |
1297 | ||
1298 | *krb5ticket = new5ticket; | |
1299 | return 0; | |
1300 | } | |
1301 | ||
1302 | ||
43fcc1b0 | 1303 | /* Given krb5 service name in KSSL_CTX *kssl_ctx (typically "kssl"), |
6977c7e2 TH |
1304 | * and krb5 AP_REQ message & message length, |
1305 | * Return Kerberos session key and client principle | |
1306 | * to SSL Server in KSSL_CTX *kssl_ctx. | |
1307 | * | |
1308 | * 19990702 VRS Started. | |
1309 | */ | |
43fcc1b0 | 1310 | krb5_error_code |
2a1ef754 RL |
1311 | kssl_sget_tkt( /* UPDATE */ KSSL_CTX *kssl_ctx, |
1312 | /* IN */ krb5_data *indata, | |
1313 | /* OUT */ krb5_ticket_times *ttimes, | |
1314 | /* OUT */ KSSL_ERR *kssl_err ) | |
43fcc1b0 RL |
1315 | { |
1316 | krb5_error_code krb5rc = KRB5KRB_ERR_GENERIC; | |
1317 | static krb5_context krb5context = NULL; | |
1318 | static krb5_auth_context krb5auth_context = NULL; | |
1319 | krb5_ticket *krb5ticket = NULL; | |
2a1ef754 | 1320 | KRB5_TKTBODY *asn1ticket = NULL; |
384dba6e | 1321 | const unsigned char *p; |
43fcc1b0 | 1322 | krb5_keytab krb5keytab = NULL; |
2a1ef754 | 1323 | krb5_keytab_entry kt_entry; |
43fcc1b0 | 1324 | krb5_principal krb5server; |
a5224c34 | 1325 | krb5_rcache rcache = NULL; |
43fcc1b0 RL |
1326 | |
1327 | kssl_err_set(kssl_err, 0, ""); | |
1328 | ||
1329 | if (!kssl_ctx) | |
1330 | { | |
2a1ef754 | 1331 | kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, |
a5224c34 | 1332 | "No kssl_ctx defined.\n"); |
43fcc1b0 RL |
1333 | goto err; |
1334 | } | |
1335 | ||
1336 | #ifdef KSSL_DEBUG | |
53332a75 | 1337 | fprintf(stderr,"in kssl_sget_tkt(%s)\n", kstring(kssl_ctx->service_name)); |
43fcc1b0 RL |
1338 | #endif /* KSSL_DEBUG */ |
1339 | ||
1340 | if (!krb5context && (krb5rc = krb5_init_context(&krb5context))) | |
1341 | { | |
1342 | kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, | |
1343 | "krb5_init_context() fails.\n"); | |
1344 | goto err; | |
1345 | } | |
1346 | if (krb5auth_context && | |
1347 | (krb5rc = krb5_auth_con_free(krb5context, krb5auth_context))) | |
1348 | { | |
1349 | kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, | |
1350 | "krb5_auth_con_free() fails.\n"); | |
1351 | goto err; | |
1352 | } | |
1353 | else krb5auth_context = NULL; | |
1354 | if (!krb5auth_context && | |
1355 | (krb5rc = krb5_auth_con_init(krb5context, &krb5auth_context))) | |
1356 | { | |
1357 | kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, | |
1358 | "krb5_auth_con_init() fails.\n"); | |
1359 | goto err; | |
1360 | } | |
1361 | ||
a5224c34 RL |
1362 | |
1363 | if ((krb5rc = krb5_auth_con_getrcache(krb5context, krb5auth_context, | |
1364 | &rcache))) | |
1365 | { | |
1366 | kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, | |
1367 | "krb5_auth_con_getrcache() fails.\n"); | |
1368 | goto err; | |
1369 | } | |
1370 | ||
43fcc1b0 RL |
1371 | if ((krb5rc = krb5_sname_to_principal(krb5context, NULL, |
1372 | (kssl_ctx->service_name)? kssl_ctx->service_name: KRB5SVC, | |
1373 | KRB5_NT_SRV_HST, &krb5server)) != 0) | |
1374 | { | |
1375 | kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, | |
1376 | "krb5_sname_to_principal() fails.\n"); | |
1377 | goto err; | |
1378 | } | |
1379 | ||
a5224c34 RL |
1380 | if (rcache == NULL) |
1381 | { | |
1382 | if ((krb5rc = krb5_get_server_rcache(krb5context, | |
1383 | krb5_princ_component(krb5context, krb5server, 0), | |
1384 | &rcache))) | |
1385 | { | |
1386 | kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, | |
1387 | "krb5_get_server_rcache() fails.\n"); | |
1388 | goto err; | |
1389 | } | |
1390 | } | |
1391 | ||
1392 | if ((krb5rc = krb5_auth_con_setrcache(krb5context, krb5auth_context, rcache))) | |
1393 | { | |
1394 | kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, | |
1395 | "krb5_auth_con_setrcache() fails.\n"); | |
1396 | goto err; | |
1397 | } | |
1398 | ||
1399 | ||
f9b3bff6 | 1400 | /* kssl_ctx->keytab_file == NULL ==> use Kerberos default |
43fcc1b0 | 1401 | */ |
f9b3bff6 RL |
1402 | if (kssl_ctx->keytab_file) |
1403 | { | |
1404 | krb5rc = krb5_kt_resolve(krb5context, kssl_ctx->keytab_file, | |
1405 | &krb5keytab); | |
3e7a6396 | 1406 | if (krb5rc) |
f9b3bff6 RL |
1407 | { |
1408 | kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, | |
1409 | "krb5_kt_resolve() fails.\n"); | |
1410 | goto err; | |
1411 | } | |
1412 | } | |
1413 | else | |
1414 | { | |
1415 | krb5rc = krb5_kt_default(krb5context,&krb5keytab); | |
1416 | if (krb5rc) | |
1417 | { | |
1418 | kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, | |
1419 | "krb5_kt_default() fails.\n"); | |
1420 | goto err; | |
1421 | } | |
1422 | } | |
43fcc1b0 | 1423 | |
6977c7e2 TH |
1424 | /*- Actual Kerberos5 krb5_recvauth() has initial conversation here |
1425 | * o check KRB5_SENDAUTH_BADAUTHVERS | |
1426 | * unless KRB5_RECVAUTH_SKIP_VERSION | |
1427 | * o check KRB5_SENDAUTH_BADAPPLVERS | |
1428 | * o send "0" msg if all OK | |
1429 | */ | |
43fcc1b0 | 1430 | |
6977c7e2 TH |
1431 | /*- |
1432 | * 20010411 was using AP_REQ instead of true KerberosWrapper | |
1433 | * | |
1434 | * if ((krb5rc = krb5_rd_req(krb5context, &krb5auth_context, | |
1435 | * &krb5in_data, krb5server, krb5keytab, | |
1436 | * &ap_option, &krb5ticket)) != 0) { Error } | |
1437 | */ | |
2a1ef754 | 1438 | |
fdc2bbca | 1439 | p = (unsigned char *)indata->data; |
2a1ef754 RL |
1440 | if ((asn1ticket = (KRB5_TKTBODY *) d2i_KRB5_TICKET(NULL, &p, |
1441 | (long) indata->length)) == NULL) | |
1442 | { | |
1443 | BIO_snprintf(kssl_err->text, KSSL_ERR_MAX, | |
1444 | "d2i_KRB5_TICKET() ASN.1 decode failure.\n"); | |
1445 | kssl_err->reason = SSL_R_KRB5_S_RD_REQ; | |
1446 | goto err; | |
1447 | } | |
1448 | ||
1449 | /* Was: krb5rc = krb5_decode_ticket(krb5in_data,&krb5ticket)) != 0) */ | |
1450 | if ((krb5rc = kssl_TKT2tkt(krb5context, asn1ticket, &krb5ticket, | |
1451 | kssl_err)) != 0) | |
1452 | { | |
1453 | BIO_snprintf(kssl_err->text, KSSL_ERR_MAX, | |
1454 | "Error converting ASN.1 ticket to krb5_ticket.\n"); | |
1455 | kssl_err->reason = SSL_R_KRB5_S_RD_REQ; | |
1456 | goto err; | |
1457 | } | |
1458 | ||
1459 | if (! krb5_principal_compare(krb5context, krb5server, | |
1460 | krb5ticket->server)) { | |
1461 | krb5rc = KRB5_PRINC_NOMATCH; | |
1462 | BIO_snprintf(kssl_err->text, KSSL_ERR_MAX, | |
1463 | "server principal != ticket principal\n"); | |
1464 | kssl_err->reason = SSL_R_KRB5_S_RD_REQ; | |
1465 | goto err; | |
1466 | } | |
1467 | if ((krb5rc = krb5_kt_get_entry(krb5context, krb5keytab, | |
1468 | krb5ticket->server, krb5ticket->enc_part.kvno, | |
1469 | krb5ticket->enc_part.enctype, &kt_entry)) != 0) { | |
43fcc1b0 | 1470 | BIO_snprintf(kssl_err->text, KSSL_ERR_MAX, |
2a1ef754 | 1471 | "krb5_kt_get_entry() fails with %x.\n", krb5rc); |
43fcc1b0 RL |
1472 | kssl_err->reason = SSL_R_KRB5_S_RD_REQ; |
1473 | goto err; | |
1474 | } | |
2a1ef754 RL |
1475 | if ((krb5rc = krb5_decrypt_tkt_part(krb5context, &kt_entry.key, |
1476 | krb5ticket)) != 0) { | |
1477 | BIO_snprintf(kssl_err->text, KSSL_ERR_MAX, | |
1478 | "krb5_decrypt_tkt_part() failed.\n"); | |
1479 | kssl_err->reason = SSL_R_KRB5_S_RD_REQ; | |
1480 | goto err; | |
1481 | } | |
1482 | else { | |
1483 | krb5_kt_free_entry(krb5context, &kt_entry); | |
1484 | #ifdef KSSL_DEBUG | |
1485 | { | |
1486 | int i; krb5_address **paddr = krb5ticket->enc_part2->caddrs; | |
53332a75 RL |
1487 | fprintf(stderr,"Decrypted ticket fields:\n"); |
1488 | fprintf(stderr,"\tflags: %X, transit-type: %X", | |
2a1ef754 RL |
1489 | krb5ticket->enc_part2->flags, |
1490 | krb5ticket->enc_part2->transited.tr_type); | |
1491 | print_krb5_data("\ttransit-data: ", | |
1492 | &(krb5ticket->enc_part2->transited.tr_contents)); | |
53332a75 | 1493 | fprintf(stderr,"\tcaddrs: %p, authdata: %p\n", |
2a1ef754 RL |
1494 | krb5ticket->enc_part2->caddrs, |
1495 | krb5ticket->enc_part2->authorization_data); | |
131645ec RL |
1496 | if (paddr) |
1497 | { | |
53332a75 | 1498 | fprintf(stderr,"\tcaddrs:\n"); |
131645ec RL |
1499 | for (i=0; paddr[i] != NULL; i++) |
1500 | { | |
1501 | krb5_data d; | |
1502 | d.length=paddr[i]->length; | |
1503 | d.data=paddr[i]->contents; | |
1504 | print_krb5_data("\t\tIP: ", &d); | |
1505 | } | |
2a1ef754 | 1506 | } |
53332a75 | 1507 | fprintf(stderr,"\tstart/auth/end times: %d / %d / %d\n", |
2a1ef754 RL |
1508 | krb5ticket->enc_part2->times.starttime, |
1509 | krb5ticket->enc_part2->times.authtime, | |
1510 | krb5ticket->enc_part2->times.endtime); | |
1511 | } | |
1512 | #endif /* KSSL_DEBUG */ | |
1513 | } | |
43fcc1b0 RL |
1514 | |
1515 | krb5rc = KRB5_NO_TKT_SUPPLIED; | |
1516 | if (!krb5ticket || !krb5ticket->enc_part2 || | |
1517 | !krb5ticket->enc_part2->client || | |
1518 | !krb5ticket->enc_part2->client->data || | |
1519 | !krb5ticket->enc_part2->session) | |
1520 | { | |
1521 | kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET, | |
1522 | "bad ticket from krb5_rd_req.\n"); | |
1523 | } | |
1524 | else if (kssl_ctx_setprinc(kssl_ctx, KSSL_CLIENT, | |
253e893c RL |
1525 | &krb5ticket->enc_part2->client->realm, |
1526 | krb5ticket->enc_part2->client->data, | |
1527 | krb5ticket->enc_part2->client->length)) | |
43fcc1b0 RL |
1528 | { |
1529 | kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET, | |
1530 | "kssl_ctx_setprinc() fails.\n"); | |
1531 | } | |
1532 | else if (kssl_ctx_setkey(kssl_ctx, krb5ticket->enc_part2->session)) | |
1533 | { | |
1534 | kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET, | |
1535 | "kssl_ctx_setkey() fails.\n"); | |
1536 | } | |
2a1ef754 RL |
1537 | else if (krb5ticket->enc_part2->flags & TKT_FLG_INVALID) |
1538 | { | |
1539 | krb5rc = KRB5KRB_AP_ERR_TKT_INVALID; | |
1540 | kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET, | |
1541 | "invalid ticket from krb5_rd_req.\n"); | |
1542 | } | |
43fcc1b0 RL |
1543 | else krb5rc = 0; |
1544 | ||
2a1ef754 RL |
1545 | kssl_ctx->enctype = krb5ticket->enc_part.enctype; |
1546 | ttimes->authtime = krb5ticket->enc_part2->times.authtime; | |
1547 | ttimes->starttime = krb5ticket->enc_part2->times.starttime; | |
1548 | ttimes->endtime = krb5ticket->enc_part2->times.endtime; | |
1549 | ttimes->renew_till = krb5ticket->enc_part2->times.renew_till; | |
1550 | ||
43fcc1b0 RL |
1551 | err: |
1552 | #ifdef KSSL_DEBUG | |
1553 | kssl_ctx_show(kssl_ctx); | |
1554 | #endif /* KSSL_DEBUG */ | |
1555 | ||
2a1ef754 | 1556 | if (asn1ticket) KRB5_TICKET_free((KRB5_TICKET *) asn1ticket); |
f9b3bff6 | 1557 | if (krb5keytab) krb5_kt_close(krb5context, krb5keytab); |
43fcc1b0 RL |
1558 | if (krb5ticket) krb5_free_ticket(krb5context, krb5ticket); |
1559 | if (krb5server) krb5_free_principal(krb5context, krb5server); | |
1560 | return (krb5rc); | |
1561 | } | |
1562 | ||
1563 | ||
1564 | /* Allocate & return a new kssl_ctx struct. | |
1565 | */ | |
1566 | KSSL_CTX * | |
1567 | kssl_ctx_new(void) | |
1568 | { | |
15780a1e | 1569 | return ((KSSL_CTX *) kssl_calloc(1, sizeof(KSSL_CTX))); |
43fcc1b0 RL |
1570 | } |
1571 | ||
1572 | ||
1573 | /* Frees a kssl_ctx struct and any allocated memory it holds. | |
6977c7e2 TH |
1574 | * Returns NULL. |
1575 | */ | |
43fcc1b0 RL |
1576 | KSSL_CTX * |
1577 | kssl_ctx_free(KSSL_CTX *kssl_ctx) | |
1578 | { | |
1579 | if (kssl_ctx == NULL) return kssl_ctx; | |
1580 | ||
4579924b | 1581 | if (kssl_ctx->key) OPENSSL_cleanse(kssl_ctx->key, |
2a1ef754 | 1582 | kssl_ctx->length); |
15780a1e NL |
1583 | if (kssl_ctx->key) kssl_free(kssl_ctx->key); |
1584 | if (kssl_ctx->client_princ) kssl_free(kssl_ctx->client_princ); | |
1585 | if (kssl_ctx->service_host) kssl_free(kssl_ctx->service_host); | |
1586 | if (kssl_ctx->service_name) kssl_free(kssl_ctx->service_name); | |
1587 | if (kssl_ctx->keytab_file) kssl_free(kssl_ctx->keytab_file); | |
43fcc1b0 | 1588 | |
15780a1e | 1589 | kssl_free(kssl_ctx); |
43fcc1b0 RL |
1590 | return (KSSL_CTX *) NULL; |
1591 | } | |
1592 | ||
1593 | ||
253e893c | 1594 | /* Given an array of (krb5_data *) entity (and optional realm), |
6977c7e2 TH |
1595 | * set the plain (char *) client_princ or service_host member |
1596 | * of the kssl_ctx struct. | |
1597 | */ | |
43fcc1b0 RL |
1598 | krb5_error_code |
1599 | kssl_ctx_setprinc(KSSL_CTX *kssl_ctx, int which, | |
253e893c | 1600 | krb5_data *realm, krb5_data *entity, int nentities) |
43fcc1b0 RL |
1601 | { |
1602 | char **princ; | |
1603 | int length; | |
253e893c | 1604 | int i; |
43fcc1b0 RL |
1605 | |
1606 | if (kssl_ctx == NULL || entity == NULL) return KSSL_CTX_ERR; | |
1607 | ||
1608 | switch (which) | |
1609 | { | |
1610 | case KSSL_CLIENT: princ = &kssl_ctx->client_princ; break; | |
1611 | case KSSL_SERVER: princ = &kssl_ctx->service_host; break; | |
1612 | default: return KSSL_CTX_ERR; break; | |
1613 | } | |
15780a1e | 1614 | if (*princ) kssl_free(*princ); |
43fcc1b0 | 1615 | |
253e893c RL |
1616 | /* Add up all the entity->lengths */ |
1617 | length = 0; | |
1618 | for (i=0; i < nentities; i++) | |
1619 | { | |
1620 | length += entity[i].length; | |
1621 | } | |
1622 | /* Add in space for the '/' character(s) (if any) */ | |
1623 | length += nentities-1; | |
1624 | /* Space for the ('@'+realm+NULL | NULL) */ | |
1625 | length += ((realm)? realm->length + 2: 1); | |
1626 | ||
15780a1e | 1627 | if ((*princ = kssl_calloc(1, length)) == NULL) |
f9b3bff6 | 1628 | return KSSL_CTX_ERR; |
43fcc1b0 | 1629 | else |
253e893c RL |
1630 | { |
1631 | for (i = 0; i < nentities; i++) | |
1632 | { | |
1633 | strncat(*princ, entity[i].data, entity[i].length); | |
1634 | if (i < nentities-1) | |
1635 | { | |
1636 | strcat (*princ, "/"); | |
1637 | } | |
1638 | } | |
43fcc1b0 RL |
1639 | if (realm) |
1640 | { | |
1641 | strcat (*princ, "@"); | |
1642 | (void) strncat(*princ, realm->data, realm->length); | |
1643 | } | |
1644 | } | |
1645 | ||
1646 | return KSSL_CTX_OK; | |
1647 | } | |
1648 | ||
1649 | ||
6977c7e2 TH |
1650 | /*- Set one of the plain (char *) string members of the kssl_ctx struct. |
1651 | * Default values should be: | |
1652 | * which == KSSL_SERVICE => "khost" (KRB5SVC) | |
1653 | * which == KSSL_KEYTAB => "/etc/krb5.keytab" (KRB5KEYTAB) | |
1654 | */ | |
43fcc1b0 RL |
1655 | krb5_error_code |
1656 | kssl_ctx_setstring(KSSL_CTX *kssl_ctx, int which, char *text) | |
1657 | { | |
1658 | char **string; | |
1659 | ||
1660 | if (!kssl_ctx) return KSSL_CTX_ERR; | |
1661 | ||
1662 | switch (which) | |
1663 | { | |
1664 | case KSSL_SERVICE: string = &kssl_ctx->service_name; break; | |
1665 | case KSSL_SERVER: string = &kssl_ctx->service_host; break; | |
1666 | case KSSL_CLIENT: string = &kssl_ctx->client_princ; break; | |
1667 | case KSSL_KEYTAB: string = &kssl_ctx->keytab_file; break; | |
1668 | default: return KSSL_CTX_ERR; break; | |
1669 | } | |
15780a1e | 1670 | if (*string) kssl_free(*string); |
43fcc1b0 RL |
1671 | |
1672 | if (!text) | |
1673 | { | |
1674 | *string = '\0'; | |
1675 | return KSSL_CTX_OK; | |
1676 | } | |
1677 | ||
15780a1e | 1678 | if ((*string = kssl_calloc(1, strlen(text) + 1)) == NULL) |
f9b3bff6 RL |
1679 | return KSSL_CTX_ERR; |
1680 | else | |
1681 | strcpy(*string, text); | |
43fcc1b0 RL |
1682 | |
1683 | return KSSL_CTX_OK; | |
1684 | } | |
1685 | ||
1686 | ||
1687 | /* Copy the Kerberos session key from a (krb5_keyblock *) to a kssl_ctx | |
6977c7e2 TH |
1688 | * struct. Clear kssl_ctx->key if Kerberos session key is NULL. |
1689 | */ | |
43fcc1b0 RL |
1690 | krb5_error_code |
1691 | kssl_ctx_setkey(KSSL_CTX *kssl_ctx, krb5_keyblock *session) | |
1692 | { | |
2a1ef754 RL |
1693 | int length; |
1694 | krb5_enctype enctype; | |
1695 | krb5_octet FAR *contents = NULL; | |
1696 | ||
43fcc1b0 RL |
1697 | if (!kssl_ctx) return KSSL_CTX_ERR; |
1698 | ||
1699 | if (kssl_ctx->key) | |
1700 | { | |
4579924b | 1701 | OPENSSL_cleanse(kssl_ctx->key, kssl_ctx->length); |
15780a1e | 1702 | kssl_free(kssl_ctx->key); |
43fcc1b0 RL |
1703 | } |
1704 | ||
1705 | if (session) | |
1706 | { | |
2a1ef754 RL |
1707 | |
1708 | #ifdef KRB5_HEIMDAL | |
1709 | length = session->keyvalue->length; | |
1710 | enctype = session->keytype; | |
1711 | contents = session->keyvalue->contents; | |
1712 | #else | |
1713 | length = session->length; | |
1714 | enctype = session->enctype; | |
1715 | contents = session->contents; | |
1716 | #endif | |
1717 | kssl_ctx->enctype = enctype; | |
1718 | kssl_ctx->length = length; | |
43fcc1b0 RL |
1719 | } |
1720 | else | |
1721 | { | |
1722 | kssl_ctx->enctype = ENCTYPE_UNKNOWN; | |
1723 | kssl_ctx->length = 0; | |
1724 | return KSSL_CTX_OK; | |
1725 | } | |
1726 | ||
1727 | if ((kssl_ctx->key = | |
15780a1e | 1728 | (krb5_octet FAR *) kssl_calloc(1, kssl_ctx->length)) == NULL) |
43fcc1b0 RL |
1729 | { |
1730 | kssl_ctx->length = 0; | |
1731 | return KSSL_CTX_ERR; | |
1732 | } | |
f9b3bff6 | 1733 | else |
2a1ef754 | 1734 | memcpy(kssl_ctx->key, contents, length); |
43fcc1b0 RL |
1735 | |
1736 | return KSSL_CTX_OK; | |
1737 | } | |
1738 | ||
1739 | ||
1740 | /* Display contents of kssl_ctx struct | |
1741 | */ | |
1742 | void | |
1743 | kssl_ctx_show(KSSL_CTX *kssl_ctx) | |
1744 | { | |
a5224c34 | 1745 | int i; |
43fcc1b0 RL |
1746 | |
1747 | printf("kssl_ctx: "); | |
1748 | if (kssl_ctx == NULL) | |
1749 | { | |
1750 | printf("NULL\n"); | |
1751 | return; | |
1752 | } | |
f9b3bff6 | 1753 | else |
4e8172d6 | 1754 | printf("%p\n", (void *)kssl_ctx); |
43fcc1b0 RL |
1755 | |
1756 | printf("\tservice:\t%s\n", | |
1757 | (kssl_ctx->service_name)? kssl_ctx->service_name: "NULL"); | |
1758 | printf("\tclient:\t%s\n", | |
1759 | (kssl_ctx->client_princ)? kssl_ctx->client_princ: "NULL"); | |
1760 | printf("\tserver:\t%s\n", | |
1761 | (kssl_ctx->service_host)? kssl_ctx->service_host: "NULL"); | |
1762 | printf("\tkeytab:\t%s\n", | |
1763 | (kssl_ctx->keytab_file)? kssl_ctx->keytab_file: "NULL"); | |
1764 | printf("\tkey [%d:%d]:\t", | |
1765 | kssl_ctx->enctype, kssl_ctx->length); | |
1766 | ||
1767 | for (i=0; i < kssl_ctx->length && kssl_ctx->key; i++) | |
1768 | { | |
1769 | printf("%02x", kssl_ctx->key[i]); | |
1770 | } | |
1771 | printf("\n"); | |
1772 | return; | |
1773 | } | |
1774 | ||
a5224c34 RL |
1775 | int |
1776 | kssl_keytab_is_available(KSSL_CTX *kssl_ctx) | |
1777 | { | |
1778 | krb5_context krb5context = NULL; | |
1779 | krb5_keytab krb5keytab = NULL; | |
1780 | krb5_keytab_entry entry; | |
1781 | krb5_principal princ = NULL; | |
1782 | krb5_error_code krb5rc = KRB5KRB_ERR_GENERIC; | |
1783 | int rc = 0; | |
1784 | ||
1785 | if ((krb5rc = krb5_init_context(&krb5context))) | |
1786 | return(0); | |
1787 | ||
1788 | /* kssl_ctx->keytab_file == NULL ==> use Kerberos default | |
1789 | */ | |
1790 | if (kssl_ctx->keytab_file) | |
1791 | { | |
1792 | krb5rc = krb5_kt_resolve(krb5context, kssl_ctx->keytab_file, | |
1793 | &krb5keytab); | |
1794 | if (krb5rc) | |
1795 | goto exit; | |
1796 | } | |
1797 | else | |
1798 | { | |
1799 | krb5rc = krb5_kt_default(krb5context,&krb5keytab); | |
1800 | if (krb5rc) | |
1801 | goto exit; | |
1802 | } | |
1803 | ||
1804 | /* the host key we are looking for */ | |
1805 | krb5rc = krb5_sname_to_principal(krb5context, NULL, | |
1806 | kssl_ctx->service_name ? kssl_ctx->service_name: KRB5SVC, | |
1807 | KRB5_NT_SRV_HST, &princ); | |
1808 | ||
47333a34 DSH |
1809 | if (krb5rc) |
1810 | goto exit; | |
1811 | ||
a5224c34 RL |
1812 | krb5rc = krb5_kt_get_entry(krb5context, krb5keytab, |
1813 | princ, | |
1814 | 0 /* IGNORE_VNO */, | |
1815 | 0 /* IGNORE_ENCTYPE */, | |
1816 | &entry); | |
1817 | if ( krb5rc == KRB5_KT_NOTFOUND ) { | |
1818 | rc = 1; | |
1819 | goto exit; | |
1820 | } else if ( krb5rc ) | |
1821 | goto exit; | |
1822 | ||
1823 | krb5_kt_free_entry(krb5context, &entry); | |
1824 | rc = 1; | |
1825 | ||
1826 | exit: | |
1827 | if (krb5keytab) krb5_kt_close(krb5context, krb5keytab); | |
1828 | if (princ) krb5_free_principal(krb5context, princ); | |
1829 | if (krb5context) krb5_free_context(krb5context); | |
1830 | return(rc); | |
1831 | } | |
1832 | ||
1833 | int | |
1834 | kssl_tgt_is_available(KSSL_CTX *kssl_ctx) | |
1835 | { | |
1836 | krb5_error_code krb5rc = KRB5KRB_ERR_GENERIC; | |
1837 | krb5_context krb5context = NULL; | |
1838 | krb5_ccache krb5ccdef = NULL; | |
1839 | krb5_creds krb5creds, *krb5credsp = NULL; | |
1840 | int rc = 0; | |
1841 | ||
1842 | memset((char *)&krb5creds, 0, sizeof(krb5creds)); | |
1843 | ||
1844 | if (!kssl_ctx) | |
1845 | return(0); | |
1846 | ||
1847 | if (!kssl_ctx->service_host) | |
1848 | return(0); | |
1849 | ||
1850 | if ((krb5rc = krb5_init_context(&krb5context)) != 0) | |
1851 | goto err; | |
1852 | ||
1853 | if ((krb5rc = krb5_sname_to_principal(krb5context, | |
1854 | kssl_ctx->service_host, | |
1855 | (kssl_ctx->service_name)? kssl_ctx->service_name: KRB5SVC, | |
1856 | KRB5_NT_SRV_HST, &krb5creds.server)) != 0) | |
1857 | goto err; | |
1858 | ||
1859 | if ((krb5rc = krb5_cc_default(krb5context, &krb5ccdef)) != 0) | |
1860 | goto err; | |
1861 | ||
1862 | if ((krb5rc = krb5_cc_get_principal(krb5context, krb5ccdef, | |
1863 | &krb5creds.client)) != 0) | |
1864 | goto err; | |
1865 | ||
1866 | if ((krb5rc = krb5_get_credentials(krb5context, 0, krb5ccdef, | |
1867 | &krb5creds, &krb5credsp)) != 0) | |
1868 | goto err; | |
1869 | ||
1870 | rc = 1; | |
1871 | ||
1872 | err: | |
1873 | #ifdef KSSL_DEBUG | |
1874 | kssl_ctx_show(kssl_ctx); | |
1875 | #endif /* KSSL_DEBUG */ | |
1876 | ||
1877 | if (krb5creds.client) krb5_free_principal(krb5context, krb5creds.client); | |
1878 | if (krb5creds.server) krb5_free_principal(krb5context, krb5creds.server); | |
1879 | if (krb5context) krb5_free_context(krb5context); | |
1880 | return(rc); | |
1881 | } | |
1882 | ||
8de83bf8 | 1883 | #if !defined(OPENSSL_SYS_WINDOWS) && !defined(OPENSSL_SYS_WIN32) |
f9b3bff6 RL |
1884 | void kssl_krb5_free_data_contents(krb5_context context, krb5_data *data) |
1885 | { | |
1886 | #ifdef KRB5_HEIMDAL | |
1887 | data->length = 0; | |
a5224c34 RL |
1888 | if (data->data) |
1889 | free(data->data); | |
2a1ef754 RL |
1890 | #elif defined(KRB5_MIT_OLD11) |
1891 | if (data->data) { | |
1892 | krb5_xfree(data->data); | |
1893 | data->data = 0; | |
1894 | } | |
f9b3bff6 RL |
1895 | #else |
1896 | krb5_free_data_contents(NULL, data); | |
1897 | #endif | |
1898 | } | |
8de83bf8 | 1899 | #endif /* !OPENSSL_SYS_WINDOWS && !OPENSSL_SYS_WIN32 */ |
2a1ef754 | 1900 | |
acdf4afb RL |
1901 | |
1902 | /* Given pointers to KerberosTime and struct tm structs, convert the | |
6977c7e2 TH |
1903 | * KerberosTime string to struct tm. Note that KerberosTime is a |
1904 | * ASN1_GENERALIZEDTIME value, constrained to GMT with no fractional | |
1905 | * seconds as defined in RFC 1510. | |
1906 | * Return pointer to the (partially) filled in struct tm on success, | |
1907 | * return NULL on failure. | |
1908 | */ | |
21fb688d | 1909 | static struct tm *k_gmtime(ASN1_GENERALIZEDTIME *gtime, struct tm *k_tm) |
acdf4afb RL |
1910 | { |
1911 | char c, *p; | |
1912 | ||
1913 | if (!k_tm) return NULL; | |
fdc2bbca RL |
1914 | if (gtime == NULL || gtime->length < 14) return NULL; |
1915 | if (gtime->data == NULL) return NULL; | |
acdf4afb | 1916 | |
fdc2bbca | 1917 | p = (char *)>ime->data[14]; |
acdf4afb RL |
1918 | |
1919 | c = *p; *p = '\0'; p -= 2; k_tm->tm_sec = atoi(p); *(p+2) = c; | |
1920 | c = *p; *p = '\0'; p -= 2; k_tm->tm_min = atoi(p); *(p+2) = c; | |
1921 | c = *p; *p = '\0'; p -= 2; k_tm->tm_hour = atoi(p); *(p+2) = c; | |
1922 | c = *p; *p = '\0'; p -= 2; k_tm->tm_mday = atoi(p); *(p+2) = c; | |
1923 | c = *p; *p = '\0'; p -= 2; k_tm->tm_mon = atoi(p)-1; *(p+2) = c; | |
1924 | c = *p; *p = '\0'; p -= 4; k_tm->tm_year = atoi(p)-1900; *(p+4) = c; | |
1925 | ||
1926 | return k_tm; | |
1927 | } | |
1928 | ||
1929 | ||
2a1ef754 | 1930 | /* Helper function for kssl_validate_times(). |
6977c7e2 TH |
1931 | * We need context->clockskew, but krb5_context is an opaque struct. |
1932 | * So we try to sneek the clockskew out through the replay cache. | |
1933 | * If that fails just return a likely default (300 seconds). | |
1934 | */ | |
21fb688d | 1935 | static krb5_deltat get_rc_clockskew(krb5_context context) |
2a1ef754 RL |
1936 | { |
1937 | krb5_rcache rc; | |
1938 | krb5_deltat clockskew; | |
1939 | ||
1940 | if (krb5_rc_default(context, &rc)) return KSSL_CLOCKSKEW; | |
1941 | if (krb5_rc_initialize(context, rc, 0)) return KSSL_CLOCKSKEW; | |
1942 | if (krb5_rc_get_lifespan(context, rc, &clockskew)) { | |
1943 | clockskew = KSSL_CLOCKSKEW; | |
1944 | } | |
1945 | (void) krb5_rc_destroy(context, rc); | |
1946 | return clockskew; | |
1947 | } | |
1948 | ||
1949 | ||
1950 | /* kssl_validate_times() combines (and more importantly exposes) | |
6977c7e2 TH |
1951 | * the MIT KRB5 internal function krb5_validate_times() and the |
1952 | * in_clock_skew() macro. The authenticator client time is checked | |
1953 | * to be within clockskew secs of the current time and the current | |
1954 | * time is checked to be within the ticket start and expire times. | |
1955 | * Either check may be omitted by supplying a NULL value. | |
1956 | * Returns 0 for valid times, SSL_R_KRB5* error codes otherwise. | |
1957 | * See Also: (Kerberos source)/krb5/lib/krb5/krb/valid_times.c | |
1958 | * 20010420 VRS | |
1959 | */ | |
2a1ef754 RL |
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))) return SSL_R_KRB5_S_BAD_TICKET; | |
1969 | skew = get_rc_clockskew(context); | |
1970 | if ((rc = krb5_timeofday(context,&now))) return SSL_R_KRB5_S_BAD_TICKET; | |
1971 | krb5_free_context(context); | |
1972 | ||
1973 | if (atime && labs(atime - now) >= skew) return SSL_R_KRB5_S_TKT_SKEW; | |
1974 | ||
1975 | if (! ttimes) return 0; | |
1976 | ||
1977 | start = (ttimes->starttime != 0)? ttimes->starttime: ttimes->authtime; | |
1978 | if (start - now > skew) return SSL_R_KRB5_S_TKT_NYV; | |
1979 | if ((now - ttimes->endtime) > skew) return SSL_R_KRB5_S_TKT_EXPIRED; | |
1980 | ||
1981 | #ifdef KSSL_DEBUG | |
53332a75 | 1982 | fprintf(stderr,"kssl_validate_times: %d |<- | %d - %d | < %d ->| %d\n", |
2a1ef754 RL |
1983 | start, atime, now, skew, ttimes->endtime); |
1984 | #endif /* KSSL_DEBUG */ | |
1985 | ||
1986 | return 0; | |
1987 | } | |
1988 | ||
1989 | ||
1990 | /* Decode and decrypt given DER-encoded authenticator, then pass | |
6977c7e2 TH |
1991 | * authenticator ctime back in *atimep (or 0 if time unavailable). |
1992 | * Returns krb5_error_code and kssl_err on error. A NULL | |
1993 | * authenticator (authentp->length == 0) is not considered an error. | |
1994 | * Note that kssl_check_authent() makes use of the KRB5 session key; | |
1995 | * you must call kssl_sget_tkt() to get the key before calling this routine. | |
1996 | */ | |
2a1ef754 RL |
1997 | krb5_error_code kssl_check_authent( |
1998 | /* IN */ KSSL_CTX *kssl_ctx, | |
1999 | /* IN */ krb5_data *authentp, | |
2000 | /* OUT */ krb5_timestamp *atimep, | |
2001 | /* OUT */ KSSL_ERR *kssl_err ) | |
2002 | { | |
2003 | krb5_error_code krb5rc = 0; | |
2004 | KRB5_ENCDATA *dec_authent = NULL; | |
2005 | KRB5_AUTHENTBODY *auth = NULL; | |
2006 | krb5_enctype enctype; | |
2007 | EVP_CIPHER_CTX ciph_ctx; | |
0b4c91c0 | 2008 | const EVP_CIPHER *enc = NULL; |
2a1ef754 | 2009 | unsigned char iv[EVP_MAX_IV_LENGTH]; |
384dba6e DSH |
2010 | const unsigned char *p; |
2011 | unsigned char *unenc_authent; | |
ea8e0cc7 | 2012 | int outl, unencbufsize; |
acdf4afb RL |
2013 | struct tm tm_time, *tm_l, *tm_g; |
2014 | time_t now, tl, tg, tr, tz_offset; | |
2a1ef754 | 2015 | |
611ba3f4 | 2016 | EVP_CIPHER_CTX_init(&ciph_ctx); |
2a1ef754 RL |
2017 | *atimep = 0; |
2018 | kssl_err_set(kssl_err, 0, ""); | |
2019 | ||
2020 | #ifndef KRB5CHECKAUTH | |
2021 | authentp = NULL; | |
2022 | #else | |
2023 | #if KRB5CHECKAUTH == 0 | |
2024 | authentp = NULL; | |
2025 | #endif | |
2026 | #endif /* KRB5CHECKAUTH */ | |
2027 | ||
2028 | if (authentp == NULL || authentp->length == 0) return 0; | |
2029 | ||
2030 | #ifdef KSSL_DEBUG | |
45442167 RL |
2031 | { |
2032 | unsigned int ui; | |
53332a75 | 2033 | fprintf(stderr,"kssl_check_authent: authenticator[%d]:\n",authentp->length); |
2a1ef754 | 2034 | p = authentp->data; |
53332a75 RL |
2035 | for (ui=0; ui < authentp->length; ui++) fprintf(stderr,"%02x ",p[ui]); |
2036 | fprintf(stderr,"\n"); | |
45442167 | 2037 | } |
2a1ef754 RL |
2038 | #endif /* KSSL_DEBUG */ |
2039 | ||
2040 | unencbufsize = 2 * authentp->length; | |
2041 | if ((unenc_authent = calloc(1, unencbufsize)) == NULL) | |
2042 | { | |
2043 | kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, | |
2044 | "Unable to allocate authenticator buffer.\n"); | |
2045 | krb5rc = KRB5KRB_ERR_GENERIC; | |
2046 | goto err; | |
2047 | } | |
2048 | ||
fdc2bbca | 2049 | p = (unsigned char *)authentp->data; |
2a1ef754 RL |
2050 | if ((dec_authent = d2i_KRB5_ENCDATA(NULL, &p, |
2051 | (long) authentp->length)) == NULL) | |
2052 | { | |
2053 | kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, | |
2054 | "Error decoding authenticator.\n"); | |
2055 | krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY; | |
2056 | goto err; | |
2057 | } | |
2058 | ||
2059 | enctype = dec_authent->etype->data[0]; /* should = kssl_ctx->enctype */ | |
882e8912 RL |
2060 | #if !defined(KRB5_MIT_OLD11) |
2061 | switch ( enctype ) { | |
2062 | case ENCTYPE_DES3_CBC_SHA1: /* EVP_des_ede3_cbc(); */ | |
2063 | case ENCTYPE_DES3_CBC_SHA: | |
2064 | case ENCTYPE_DES3_CBC_RAW: | |
2065 | krb5rc = 0; /* Skip, can't handle derived keys */ | |
2066 | goto err; | |
2067 | } | |
2068 | #endif | |
2a1ef754 | 2069 | enc = kssl_map_enc(enctype); |
54a656ef | 2070 | memset(iv, 0, sizeof iv); /* per RFC 1510 */ |
2a1ef754 | 2071 | |
acdf4afb RL |
2072 | if (enc == NULL) |
2073 | { | |
2074 | /* Disable kssl_check_authent for ENCTYPE_DES3_CBC_SHA1. | |
6977c7e2 TH |
2075 | * This enctype indicates the authenticator was encrypted |
2076 | * using key-usage derived keys which openssl cannot decrypt. | |
2077 | */ | |
acdf4afb RL |
2078 | goto err; |
2079 | } | |
1004c99c LJ |
2080 | |
2081 | if (!EVP_CipherInit(&ciph_ctx,enc,kssl_ctx->key,iv,0)) | |
2082 | { | |
2083 | kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, | |
ea8e0cc7 | 2084 | "EVP_CipherInit error decrypting authenticator.\n"); |
1004c99c LJ |
2085 | krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY; |
2086 | goto err; | |
2087 | } | |
2088 | outl = dec_authent->cipher->length; | |
2089 | if (!EVP_Cipher(&ciph_ctx,unenc_authent,dec_authent->cipher->data,outl)) | |
2090 | { | |
2091 | kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, | |
2092 | "EVP_Cipher error decrypting authenticator.\n"); | |
2093 | krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY; | |
2094 | goto err; | |
2095 | } | |
2096 | EVP_CIPHER_CTX_cleanup(&ciph_ctx); | |
2a1ef754 RL |
2097 | |
2098 | #ifdef KSSL_DEBUG | |
90278430 DSH |
2099 | { |
2100 | int padl; | |
53332a75 RL |
2101 | fprintf(stderr,"kssl_check_authent: decrypted authenticator[%d] =\n", outl); |
2102 | for (padl=0; padl < outl; padl++) fprintf(stderr,"%02x ",unenc_authent[padl]); | |
2103 | fprintf(stderr,"\n"); | |
90278430 | 2104 | } |
2a1ef754 RL |
2105 | #endif /* KSSL_DEBUG */ |
2106 | ||
2107 | if ((p = kssl_skip_confound(enctype, unenc_authent)) == NULL) | |
2108 | { | |
2109 | kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, | |
2110 | "confounded by authenticator.\n"); | |
2111 | krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY; | |
2112 | goto err; | |
2113 | } | |
2114 | outl -= p - unenc_authent; | |
2115 | ||
2116 | if ((auth = (KRB5_AUTHENTBODY *) d2i_KRB5_AUTHENT(NULL, &p, | |
2117 | (long) outl))==NULL) | |
2118 | { | |
2119 | kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, | |
2120 | "Error decoding authenticator body.\n"); | |
2121 | krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY; | |
2122 | goto err; | |
2123 | } | |
acdf4afb RL |
2124 | |
2125 | memset(&tm_time,0,sizeof(struct tm)); | |
2126 | if (k_gmtime(auth->ctime, &tm_time) && | |
2127 | ((tr = mktime(&tm_time)) != (time_t)(-1))) | |
2128 | { | |
2129 | now = time(&now); | |
2130 | tm_l = localtime(&now); tl = mktime(tm_l); | |
2131 | tm_g = gmtime(&now); tg = mktime(tm_g); | |
2132 | tz_offset = tg - tl; | |
2133 | ||
b61a84c8 | 2134 | *atimep = (krb5_timestamp)(tr - tz_offset); |
acdf4afb RL |
2135 | } |
2136 | ||
2a1ef754 | 2137 | #ifdef KSSL_DEBUG |
53332a75 | 2138 | fprintf(stderr,"kssl_check_authent: returns %d for client time ", *atimep); |
acdf4afb | 2139 | if (auth && auth->ctime && auth->ctime->length && auth->ctime->data) |
53332a75 RL |
2140 | fprintf(stderr,"%.*s\n", auth->ctime->length, auth->ctime->data); |
2141 | else fprintf(stderr,"NULL\n"); | |
2a1ef754 RL |
2142 | #endif /* KSSL_DEBUG */ |
2143 | ||
2144 | err: | |
2a1ef754 RL |
2145 | if (auth) KRB5_AUTHENT_free((KRB5_AUTHENT *) auth); |
2146 | if (dec_authent) KRB5_ENCDATA_free(dec_authent); | |
2147 | if (unenc_authent) free(unenc_authent); | |
ea8e0cc7 | 2148 | EVP_CIPHER_CTX_cleanup(&ciph_ctx); |
2a1ef754 RL |
2149 | return krb5rc; |
2150 | } | |
2151 | ||
2152 | ||
2153 | /* Replaces krb5_build_principal_ext(), with varargs length == 2 (svc, host), | |
6977c7e2 TH |
2154 | * because I don't know how to stub varargs. |
2155 | * Returns krb5_error_code == ENOMEM on alloc error, otherwise | |
2156 | * passes back newly constructed principal, which should be freed by caller. | |
2157 | */ | |
2a1ef754 RL |
2158 | krb5_error_code kssl_build_principal_2( |
2159 | /* UPDATE */ krb5_context context, | |
2160 | /* OUT */ krb5_principal *princ, | |
2161 | /* IN */ int rlen, const char *realm, | |
2162 | /* IN */ int slen, const char *svc, | |
2163 | /* IN */ int hlen, const char *host) | |
2164 | { | |
2165 | krb5_data *p_data = NULL; | |
2166 | krb5_principal new_p = NULL; | |
2167 | char *new_r = NULL; | |
2168 | ||
2169 | if ((p_data = (krb5_data *) calloc(2, sizeof(krb5_data))) == NULL || | |
2170 | (new_p = (krb5_principal) calloc(1, sizeof(krb5_principal_data))) | |
2171 | == NULL) goto err; | |
2172 | new_p->length = 2; | |
2173 | new_p->data = p_data; | |
2174 | ||
2175 | if ((new_r = calloc(1, rlen + 1)) == NULL) goto err; | |
2176 | memcpy(new_r, realm, rlen); | |
2177 | krb5_princ_set_realm_length(context, new_p, rlen); | |
2178 | krb5_princ_set_realm_data(context, new_p, new_r); | |
2179 | ||
2180 | if ((new_p->data[0].data = calloc(1, slen + 1)) == NULL) goto err; | |
2181 | memcpy(new_p->data[0].data, svc, slen); | |
2182 | new_p->data[0].length = slen; | |
2183 | ||
2184 | if ((new_p->data[1].data = calloc(1, hlen + 1)) == NULL) goto err; | |
2185 | memcpy(new_p->data[1].data, host, hlen); | |
2186 | new_p->data[1].length = hlen; | |
2187 | ||
2188 | krb5_princ_type(context, new_p) = KRB5_NT_UNKNOWN; | |
2189 | *princ = new_p; | |
2190 | return 0; | |
2191 | ||
2192 | err: | |
2193 | if (new_p && new_p[0].data) free(new_p[0].data); | |
2194 | if (new_p && new_p[1].data) free(new_p[1].data); | |
2195 | if (new_p) free(new_p); | |
2196 | if (new_r) free(new_r); | |
2197 | return ENOMEM; | |
2198 | } | |
2199 | ||
39348038 DSH |
2200 | void SSL_set0_kssl_ctx(SSL *s, KSSL_CTX *kctx) |
2201 | { | |
2202 | s->kssl_ctx = kctx; | |
2203 | } | |
2204 | ||
2205 | KSSL_CTX * SSL_get0_kssl_ctx(SSL *s) | |
2206 | { | |
2207 | return s->kssl_ctx; | |
2208 | } | |
2209 | ||
2210 | char *kssl_ctx_get0_client_princ(KSSL_CTX *kctx) | |
2211 | { | |
2212 | if (kctx) | |
2213 | return kctx->client_princ; | |
2214 | return NULL; | |
2215 | } | |
2a1ef754 | 2216 | |
bc36ee62 | 2217 | #else /* !OPENSSL_NO_KRB5 */ |
b0dc680f | 2218 | |
32d0ad41 | 2219 | #if defined(PEDANTIC) || defined(OPENSSL_SYS_VMS) |
05fc7018 | 2220 | static void *dummy=&dummy; |
b0dc680f BL |
2221 | #endif |
2222 | ||
bc36ee62 | 2223 | #endif /* !OPENSSL_NO_KRB5 */ |
43fcc1b0 | 2224 |