2 * Copyright (c) 2019 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the Institute nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * This file implements a RESTful HTTPS API to an online CA, as well as an
36 * HTTP/Negotiate token issuer.
38 * Users are authenticated with bearer tokens.
40 * This is essentially a RESTful online CA sharing code with the KDC's kx509
41 * online CA, and also a proxy for PKINIT and GSS-API (Negotiate).
43 * To get a key certified:
45 * GET /bx509?csr=<base64-encoded-PKCS#10-CSR>
47 * To get an HTTP/Negotiate token:
49 * GET /bnegotiate?target=<acceptor-principal>
51 * which, if authorized, produces a Negotiate token (base64-encoded, as
52 * expected, with the "Negotiate " prefix, ready to be put in an Authorization:
56 * - rewrite to not use libmicrohttpd but an alternative more appropriate to
57 * Heimdal's license (though libmicrohttpd will do)
58 * - /bx509 should include the certificate chain
59 * - /bx509 should support HTTP/Negotiate
60 * - there should be an end-point for fetching an issuer's chain
61 * - maybe add /bkrb5 which returns a KRB-CRED with the user's TGT
64 * - We use krb5_error_code values as much as possible. Where we need to use
65 * MHD_NO because we got that from an mhd function and cannot respond with
66 * an HTTP response, we use (krb5_error_code)-1, and later map that to
69 * (MHD_NO is an ENOMEM-cannot-even-make-a-static-503-response level event.)
72 #define _XOPEN_SOURCE_EXTENDED 1
73 #define _DEFAULT_SOURCE 1
77 #include <sys/socket.h>
78 #include <sys/types.h>
96 #include <netinet/in.h>
97 #include <netinet/ip.h>
99 #include <microhttpd.h>
100 #include "kdc_locl.h"
101 #include "token_validator_plugin.h"
105 #include <gssapi/gssapi.h>
106 #include <gssapi/gssapi_krb5.h>
108 #include "../lib/hx509/hx_locl.h"
109 #include <hx509-private.h>
111 #define heim_pcontext krb5_context
112 #define heim_pconfig krb5_context
113 #include <heimbase-svc.h>
115 typedef struct bx509_request_desc
{
116 HEIM_SVC_REQUEST_DESC_COMMON_ELEMENTS
;
118 struct MHD_Connection
*connection
;
119 krb5_times token_times
;
122 const char *for_cname
;
128 krb5_addresses tgt_addresses
; /* For /get-tgt */
130 } *bx509_request_desc
;
133 audit_trail(bx509_request_desc r
, krb5_error_code ret
)
135 const char *retname
= NULL
;
137 /* Get a symbolic name for some error codes */
138 #define CASE(x) case x : retname = #x; break
142 CASE(HDB_ERR_NOT_FOUND_HERE
);
143 CASE(HDB_ERR_WRONG_REALM
);
144 CASE(HDB_ERR_EXISTS
);
145 CASE(HDB_ERR_KVNO_NOT_FOUND
);
146 CASE(HDB_ERR_NOENTRY
);
147 CASE(HDB_ERR_NO_MKEY
);
148 CASE(KRB5KDC_ERR_BADOPTION
);
149 CASE(KRB5KDC_ERR_CANNOT_POSTDATE
);
150 CASE(KRB5KDC_ERR_CLIENT_NOTYET
);
151 CASE(KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN
);
152 CASE(KRB5KDC_ERR_ETYPE_NOSUPP
);
153 CASE(KRB5KDC_ERR_KEY_EXPIRED
);
154 CASE(KRB5KDC_ERR_NAME_EXP
);
155 CASE(KRB5KDC_ERR_NEVER_VALID
);
156 CASE(KRB5KDC_ERR_NONE
);
157 CASE(KRB5KDC_ERR_NULL_KEY
);
158 CASE(KRB5KDC_ERR_PADATA_TYPE_NOSUPP
);
159 CASE(KRB5KDC_ERR_POLICY
);
160 CASE(KRB5KDC_ERR_PREAUTH_FAILED
);
161 CASE(KRB5KDC_ERR_PREAUTH_REQUIRED
);
162 CASE(KRB5KDC_ERR_SERVER_NOMATCH
);
163 CASE(KRB5KDC_ERR_SERVICE_EXP
);
164 CASE(KRB5KDC_ERR_SERVICE_NOTYET
);
165 CASE(KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN
);
166 CASE(KRB5KDC_ERR_TRTYPE_NOSUPP
);
167 CASE(KRB5KRB_ERR_RESPONSE_TOO_BIG
);
168 /* XXX Add relevant error codes */
177 /* Let's save a few bytes */
178 if (retname
&& strncmp("KRB5KDC_", retname
, sizeof("KRB5KDC_") - 1) == 0)
179 retname
+= sizeof("KRB5KDC_") - 1;
181 heim_audit_trail((heim_svc_req_desc
)r
, ret
, retname
);
184 static krb5_log_facility
*logfac
;
185 static pthread_key_t k5ctx
;
187 static krb5_error_code
188 get_krb5_context(krb5_context
*contextp
)
192 if ((*contextp
= pthread_getspecific(k5ctx
)))
194 if ((ret
= krb5_init_context(contextp
)))
195 return *contextp
= NULL
, ret
;
196 (void) pthread_setspecific(k5ctx
, *contextp
);
197 return *contextp
? 0 : ENOMEM
;
200 static int port
= -1;
201 static int help_flag
;
202 static int daemonize
;
203 static int daemon_child_fd
= -1;
204 static int verbose_counter
;
205 static int version_flag
;
206 static int reverse_proxied_flag
;
207 static int thread_per_client_flag
;
208 struct getarg_strings audiences
;
209 static const char *cert_file
;
210 static const char *priv_key_file
;
211 static const char *cache_dir
;
212 static char *impersonation_key_fn
;
214 static krb5_error_code
resp(struct bx509_request_desc
*, int,
215 enum MHD_ResponseMemoryMode
, const char *,
216 const void *, size_t, const char *);
217 static krb5_error_code
bad_req(struct bx509_request_desc
*, krb5_error_code
, int,
219 HEIMDAL_PRINTF_ATTRIBUTE((__printf__
, 4, 5));
221 static krb5_error_code
bad_enomem(struct bx509_request_desc
*, krb5_error_code
);
222 static krb5_error_code
bad_400(struct bx509_request_desc
*, krb5_error_code
, char *);
223 static krb5_error_code
bad_401(struct bx509_request_desc
*, char *);
224 static krb5_error_code
bad_403(struct bx509_request_desc
*, krb5_error_code
, char *);
225 static krb5_error_code
bad_404(struct bx509_request_desc
*, const char *);
226 static krb5_error_code
bad_405(struct bx509_request_desc
*, const char *);
227 static krb5_error_code
bad_500(struct bx509_request_desc
*, krb5_error_code
, const char *);
228 static krb5_error_code
bad_503(struct bx509_request_desc
*, krb5_error_code
, const char *);
231 validate_token(struct bx509_request_desc
*r
)
234 krb5_principal cprinc
= NULL
;
237 char token_type
[64]; /* Plenty */
240 size_t host_len
, brk
, i
;
242 memset(&r
->token_times
, 0, sizeof(r
->token_times
));
243 host
= MHD_lookup_connection_value(r
->connection
, MHD_HEADER_KIND
,
244 MHD_HTTP_HEADER_HOST
);
246 return bad_400(r
, EINVAL
, "Host header is missing");
248 /* Exclude port number here (IPv6-safe because of the below) */
249 host_len
= ((p
= strchr(host
, ':'))) ? p
- host
: strlen(host
);
251 token
= MHD_lookup_connection_value(r
->connection
, MHD_HEADER_KIND
,
252 MHD_HTTP_HEADER_AUTHORIZATION
);
254 return bad_401(r
, "Authorization token is missing");
255 brk
= strcspn(token
, " \t");
256 if (token
[brk
] == '\0' || brk
> sizeof(token_type
) - 1)
257 return bad_401(r
, "Authorization token is missing");
258 memcpy(token_type
, token
, brk
);
259 token_type
[brk
] = '\0';
261 tok
.length
= strlen(token
);
262 tok
.data
= (void *)(uintptr_t)token
;
264 for (i
= 0; i
< audiences
.num_strings
; i
++)
265 if (strncasecmp(host
, audiences
.strings
[i
], host_len
) == 0 &&
266 audiences
.strings
[i
][host_len
] == '\0')
268 if (i
== audiences
.num_strings
)
269 return bad_403(r
, EINVAL
, "Host: value is not accepted here");
271 r
->sname
= strdup(host
); /* No need to check for ENOMEM here */
273 ret
= kdc_validate_token(r
->context
, NULL
/* realm */, token_type
, &tok
,
274 (const char **)&audiences
.strings
[i
], 1,
275 &cprinc
, &r
->token_times
);
277 return bad_403(r
, ret
, "Token validation failed");
279 return bad_403(r
, ret
, "Could not extract a principal name "
281 ret
= krb5_unparse_name(r
->context
, cprinc
, &r
->cname
);
282 krb5_free_principal(r
->context
, cprinc
);
284 return bad_503(r
, ret
, "Could not parse principal name");
289 generate_key(hx509_context context
,
290 const char *key_name
,
291 const char *gen_type
,
292 unsigned long gen_bits
,
295 struct hx509_generate_private_context
*key_gen_ctx
= NULL
;
296 hx509_private_key key
= NULL
;
297 hx509_certs certs
= NULL
;
298 hx509_cert cert
= NULL
;
301 if (strcmp(gen_type
, "rsa") != 0)
302 errx(1, "Only RSA keys are supported at this time");
304 if (asprintf(fn
, "PEM-FILE:%s/.%s_priv_key.pem",
305 cache_dir
, key_name
) == -1 ||
307 err(1, "Could not set up private key for %s", key_name
);
309 ret
= _hx509_generate_private_key_init(context
,
310 ASN1_OID_ID_PKCS1_RSAENCRYPTION
,
313 ret
= _hx509_generate_private_key_bits(context
, key_gen_ctx
, gen_bits
);
315 ret
= _hx509_generate_private_key(context
, key_gen_ctx
, &key
);
317 cert
= hx509_cert_init_private_key(context
, key
, NULL
);
319 ret
= hx509_certs_init(context
, *fn
,
320 HX509_CERTS_CREATE
| HX509_CERTS_UNPROTECT_ALL
,
323 ret
= hx509_certs_add(context
, certs
, cert
);
325 ret
= hx509_certs_store(context
, certs
, 0, NULL
);
327 hx509_err(context
, 1, ret
, "Could not generate and save private key "
330 _hx509_generate_private_key_free(&key_gen_ctx
);
331 hx509_private_key_free(&key
);
332 hx509_certs_free(&certs
);
333 hx509_cert_free(cert
);
337 k5_free_context(void *ctx
)
339 krb5_free_context(ctx
);
342 #ifndef HAVE_UNLINKAT
344 unlink1file(const char *dname
, const char *name
)
348 if (strlcpy(p
, dname
, sizeof(p
)) < sizeof(p
) &&
349 strlcat(p
, "/", sizeof(p
)) < sizeof(p
) &&
350 strlcat(p
, name
, sizeof(p
)) < sizeof(p
))
363 * This works, but not on Win32:
365 * (void) simple_execlp("rm", "rm", "-rf", cache_dir, NULL);
367 * We make no directories in `cache_dir', so we need not recurse.
369 if ((d
= opendir(cache_dir
)) == NULL
)
372 while ((e
= readdir(d
))) {
375 * Because unlinkat() takes a directory FD, implementing one for
376 * libroken is tricky at best. Instead we might want to implement an
377 * rm_dash_rf() function in lib/roken.
379 (void) unlinkat(dirfd(d
), e
->d_name
, 0);
381 (void) unlink1file(cache_dir
, e
->d_name
);
385 (void) rmdir(cache_dir
);
388 static krb5_error_code
389 mk_pkix_store(char **pkix_store
)
396 if (asprintf(&s
, "PEM-FILE:%s/pkix-XXXXXX", cache_dir
) == -1 ||
402 * This way of using mkstemp() isn't safer than mktemp(), but we want to
403 * quiet the warning that we'd get if we used mktemp().
405 if ((fd
= mkstemp(s
+ sizeof("PEM-FILE:") - 1)) == -1) {
415 * XXX Shouldn't be a body, but a status message. The body should be
416 * configurable to be from a file. MHD doesn't give us a way to set the
417 * response status message though, just the body.
419 static krb5_error_code
420 resp(struct bx509_request_desc
*r
,
421 int http_status_code
,
422 enum MHD_ResponseMemoryMode rmmode
,
423 const char *content_type
,
428 struct MHD_Response
*response
;
431 (void) gettimeofday(&r
->tv_end
, NULL
);
432 if (http_status_code
== MHD_HTTP_OK
||
433 http_status_code
== MHD_HTTP_TEMPORARY_REDIRECT
)
436 response
= MHD_create_response_from_buffer(bodylen
, rk_UNCONST(body
),
438 if (response
== NULL
)
440 mret
= MHD_add_response_header(response
, MHD_HTTP_HEADER_CACHE_CONTROL
,
441 "no-store, max-age=0");
442 if (mret
== MHD_YES
&& http_status_code
== MHD_HTTP_UNAUTHORIZED
) {
443 mret
= MHD_add_response_header(response
,
444 MHD_HTTP_HEADER_WWW_AUTHENTICATE
,
447 mret
= MHD_add_response_header(response
,
448 MHD_HTTP_HEADER_WWW_AUTHENTICATE
,
450 } else if (mret
== MHD_YES
&& http_status_code
== MHD_HTTP_TEMPORARY_REDIRECT
) {
454 redir
= MHD_lookup_connection_value(r
->connection
, MHD_GET_ARGUMENT_KIND
,
456 mret
= MHD_add_response_header(response
, MHD_HTTP_HEADER_LOCATION
,
458 if (mret
!= MHD_NO
&& token
)
459 mret
= MHD_add_response_header(response
,
460 MHD_HTTP_HEADER_AUTHORIZATION
,
463 if (mret
== MHD_YES
&& content_type
) {
464 mret
= MHD_add_response_header(response
,
465 MHD_HTTP_HEADER_CONTENT_TYPE
,
469 mret
= MHD_queue_response(r
->connection
, http_status_code
, response
);
470 MHD_destroy_response(response
);
471 return mret
== MHD_NO
? -1 : 0;
474 static krb5_error_code
475 bad_reqv(struct bx509_request_desc
*r
,
476 krb5_error_code code
,
477 int http_status_code
,
482 krb5_context context
= NULL
;
483 const char *k5msg
= NULL
;
484 const char *emsg
= NULL
;
485 char *formatted
= NULL
;
488 heim_audit_setkv_number((heim_svc_req_desc
)r
, "http-status-code",
490 (void) gettimeofday(&r
->tv_end
, NULL
);
491 if (code
== ENOMEM
) {
493 krb5_log_msg(r
->context
, logfac
, 1, NULL
, "Out of memory");
494 audit_trail(r
, code
);
495 return resp(r
, http_status_code
, MHD_RESPMEM_PERSISTENT
,
496 NULL
, fmt
, strlen(fmt
), NULL
);
501 emsg
= k5msg
= krb5_get_error_message(r
->context
, code
);
503 emsg
= strerror(code
);
506 ret
= vasprintf(&formatted
, fmt
, ap
) == -1;
508 if (ret
> -1 && formatted
)
509 ret
= asprintf(&msg
, "%s: %s (%d)", formatted
, emsg
, (int)code
);
514 heim_audit_addreason((heim_svc_req_desc
)r
, "%s", msg
);
515 audit_trail(r
, code
);
516 krb5_free_error_message(context
, k5msg
);
518 if (ret
== -1 || msg
== NULL
) {
520 krb5_log_msg(r
->context
, logfac
, 1, NULL
, "Out of memory");
521 return resp(r
, MHD_HTTP_SERVICE_UNAVAILABLE
, MHD_RESPMEM_PERSISTENT
,
522 NULL
, "Out of memory", sizeof("Out of memory") - 1, NULL
);
525 ret
= resp(r
, http_status_code
, MHD_RESPMEM_MUST_COPY
,
526 NULL
, msg
, strlen(msg
), NULL
);
529 return ret
== -1 ? -1 : code
;
532 static krb5_error_code
533 bad_req(struct bx509_request_desc
*r
,
534 krb5_error_code code
,
535 int http_status_code
,
543 ret
= bad_reqv(r
, code
, http_status_code
, fmt
, ap
);
548 static krb5_error_code
549 bad_enomem(struct bx509_request_desc
*r
, krb5_error_code ret
)
551 return bad_req(r
, ret
, MHD_HTTP_SERVICE_UNAVAILABLE
,
555 static krb5_error_code
556 bad_400(struct bx509_request_desc
*r
, int ret
, char *reason
)
558 return bad_req(r
, ret
, MHD_HTTP_BAD_REQUEST
, "%s", reason
);
561 static krb5_error_code
562 bad_401(struct bx509_request_desc
*r
, char *reason
)
564 return bad_req(r
, EACCES
, MHD_HTTP_UNAUTHORIZED
, "%s", reason
);
567 static krb5_error_code
568 bad_403(struct bx509_request_desc
*r
, krb5_error_code ret
, char *reason
)
570 return bad_req(r
, ret
, MHD_HTTP_FORBIDDEN
, "%s", reason
);
573 static krb5_error_code
574 bad_404(struct bx509_request_desc
*r
, const char *name
)
576 return bad_req(r
, ENOENT
, MHD_HTTP_NOT_FOUND
,
577 "Resource not found: %s", name
);
580 static krb5_error_code
581 bad_405(struct bx509_request_desc
*r
, const char *method
)
583 return bad_req(r
, EPERM
, MHD_HTTP_METHOD_NOT_ALLOWED
,
584 "Method not supported: %s", method
);
587 static krb5_error_code
588 bad_500(struct bx509_request_desc
*r
,
592 return bad_req(r
, ret
, MHD_HTTP_INTERNAL_SERVER_ERROR
,
593 "Internal error: %s", reason
);
596 static krb5_error_code
597 bad_503(struct bx509_request_desc
*r
,
601 return bad_req(r
, ret
, MHD_HTTP_SERVICE_UNAVAILABLE
,
602 "Service unavailable: %s", reason
);
605 static krb5_error_code
606 good_bx509(struct bx509_request_desc
*r
)
612 ret
= rk_undumpdata(strchr(r
->pkix_store
, ':') + 1, &body
, &bodylen
);
614 return bad_503(r
, ret
, "Could not recover issued certificate "
617 (void) gettimeofday(&r
->tv_end
, NULL
);
618 ret
= resp(r
, MHD_HTTP_OK
, MHD_RESPMEM_MUST_COPY
, "application/x-pem-file",
619 body
, bodylen
, NULL
);
624 static enum MHD_Result
625 bx509_param_cb(void *d
,
626 enum MHD_ValueKind kind
,
630 struct bx509_request_desc
*r
= d
;
631 heim_oid oid
= { 0, 0 };
633 if (strcmp(key
, "eku") == 0 && val
) {
634 heim_audit_addkv((heim_svc_req_desc
)r
, KDC_AUDIT_VIS
, "requested_eku",
636 r
->ret
= der_parse_heim_oid(val
, ".", &oid
);
638 r
->ret
= hx509_request_add_eku(r
->context
->hx509ctx
, r
->req
, &oid
);
640 } else if (strcmp(key
, "dNSName") == 0 && val
) {
641 heim_audit_addkv((heim_svc_req_desc
)r
, KDC_AUDIT_VIS
,
642 "requested_dNSName", "%s", val
);
643 r
->ret
= hx509_request_add_dns_name(r
->context
->hx509ctx
, r
->req
, val
);
644 } else if (strcmp(key
, "rfc822Name") == 0 && val
) {
645 heim_audit_addkv((heim_svc_req_desc
)r
, KDC_AUDIT_VIS
,
646 "requested_rfc822Name", "%s", val
);
647 r
->ret
= hx509_request_add_email(r
->context
->hx509ctx
, r
->req
, val
);
648 } else if (strcmp(key
, "xMPPName") == 0 && val
) {
649 heim_audit_addkv((heim_svc_req_desc
)r
, KDC_AUDIT_VIS
,
650 "requested_xMPPName", "%s", val
);
651 r
->ret
= hx509_request_add_xmpp_name(r
->context
->hx509ctx
, r
->req
,
653 } else if (strcmp(key
, "krb5PrincipalName") == 0 && val
) {
654 heim_audit_addkv((heim_svc_req_desc
)r
, KDC_AUDIT_VIS
,
655 "requested_krb5PrincipalName", "%s", val
);
656 r
->ret
= hx509_request_add_pkinit(r
->context
->hx509ctx
, r
->req
,
658 } else if (strcmp(key
, "ms-upn") == 0 && val
) {
659 heim_audit_addkv((heim_svc_req_desc
)r
, KDC_AUDIT_VIS
,
660 "requested_ms_upn", "%s", val
);
661 r
->ret
= hx509_request_add_ms_upn_name(r
->context
->hx509ctx
, r
->req
,
663 } else if (strcmp(key
, "registeredID") == 0 && val
) {
664 heim_audit_addkv((heim_svc_req_desc
)r
, KDC_AUDIT_VIS
,
665 "requested_registered_id", "%s", val
);
666 r
->ret
= der_parse_heim_oid(val
, ".", &oid
);
668 r
->ret
= hx509_request_add_registered(r
->context
->hx509ctx
, r
->req
,
671 } else if (strcmp(key
, "csr") == 0 && val
) {
672 heim_audit_setkv_bool((heim_svc_req_desc
)r
, "requested_csr", TRUE
);
673 r
->ret
= 0; /* Handled upstairs */
674 } else if (strcmp(key
, "lifetime") == 0 && val
) {
675 r
->req_life
= parse_time(val
, "day");
677 /* Produce error for unknown params */
678 heim_audit_setkv_bool((heim_svc_req_desc
)r
, "requested_unknown", TRUE
);
679 krb5_set_error_message(r
->context
, r
->ret
= ENOTSUP
,
680 "Query parameter %s not supported", key
);
682 return r
->ret
== 0 ? MHD_YES
: MHD_NO
/* Stop iterating */;
685 static krb5_error_code
686 authorize_CSR(struct bx509_request_desc
*r
,
688 krb5_const_principal p
)
692 ret
= hx509_request_parse_der(r
->context
->hx509ctx
, csr
, &r
->req
);
694 return bad_req(r
, ret
, MHD_HTTP_SERVICE_UNAVAILABLE
,
695 "Could not parse CSR");
697 (void) MHD_get_connection_values(r
->connection
, MHD_GET_ARGUMENT_KIND
,
701 return bad_req(r
, ret
, MHD_HTTP_SERVICE_UNAVAILABLE
,
702 "Could not handle query parameters");
704 ret
= kdc_authorize_csr(r
->context
, "bx509", r
->req
, p
);
706 return bad_403(r
, ret
, "Not authorized to requested certificate");
711 * hx509_certs_iter_f() callback to assign a private key to the first cert in a
714 static int HX509_LIB_CALL
715 set_priv_key(hx509_context context
, void *d
, hx509_cert c
)
717 (void) _hx509_cert_assign_key(c
, (hx509_private_key
)d
);
718 return -1; /* stop iteration */
721 static krb5_error_code
722 store_certs(hx509_context context
,
724 hx509_certs store_these
,
725 hx509_private_key key
)
728 hx509_certs certs
= NULL
;
730 ret
= hx509_certs_init(context
, store
, HX509_CERTS_CREATE
, NULL
,
734 (void) hx509_certs_iter_f(context
, store_these
, set_priv_key
, key
);
735 hx509_certs_merge(context
, certs
, store_these
);
738 hx509_certs_store(context
, certs
, 0, NULL
);
739 hx509_certs_free(&certs
);
743 /* Setup a CSR for bx509() */
744 static krb5_error_code
745 do_CA(struct bx509_request_desc
*r
, const char *csr
)
747 krb5_error_code ret
= 0;
749 hx509_certs certs
= NULL
;
755 * Work around bug where microhttpd decodes %2b to + then + to space. That
756 * bug does not affect other base64 special characters that get URI
759 if ((csr2
= strdup(csr
)) == NULL
)
760 return bad_enomem(r
, ENOMEM
);
761 for (q
= strchr(csr2
, ' '); q
; q
= strchr(q
+ 1, ' '))
764 ret
= krb5_parse_name(r
->context
, r
->cname
, &p
);
767 return bad_req(r
, ret
, MHD_HTTP_SERVICE_UNAVAILABLE
,
768 "Could not parse principal name");
772 if ((d
.data
= malloc(strlen(csr2
))) == NULL
) {
773 krb5_free_principal(r
->context
, p
);
774 return bad_enomem(r
, ENOMEM
);
777 bytes
= rk_base64_decode(csr2
, d
.data
);
784 krb5_free_principal(r
->context
, p
);
786 return bad_500(r
, ret
, "Invalid base64 encoding of CSR");
790 * Parses and validates the CSR, adds external extension requests from
791 * query parameters, then checks authorization.
793 ret
= authorize_CSR(r
, &d
, p
);
798 krb5_free_principal(r
->context
, p
);
799 return ret
; /* authorize_CSR() calls bad_req() */
802 /* Issue the certificate */
803 ret
= kdc_issue_certificate(r
->context
, "bx509", logfac
, r
->req
, p
,
804 &r
->token_times
, r
->req_life
,
805 1 /* send_chain */, &certs
);
806 krb5_free_principal(r
->context
, p
);
808 if (ret
== KRB5KDC_ERR_POLICY
|| ret
== EACCES
)
809 return bad_403(r
, ret
,
810 "Certificate request denied for policy reasons");
811 return bad_500(r
, ret
, "Certificate issuance failed");
814 /* Setup PKIX store */
815 if ((ret
= mk_pkix_store(&r
->pkix_store
)))
816 return bad_500(r
, ret
,
817 "Could not create PEM store for issued certificate");
819 ret
= store_certs(r
->context
->hx509ctx
, r
->pkix_store
, certs
, NULL
);
820 hx509_certs_free(&certs
);
822 (void) unlink(strchr(r
->pkix_store
, ':') + 1);
823 return bad_500(r
, ret
,
824 "Failed convert issued certificate and chain to PEM");
829 /* Copied from kdc/connect.c */
831 addr_to_string(krb5_context context
,
832 struct sockaddr
*addr
,
839 ret
= krb5_sockaddr2address(context
, addr
, &a
);
841 ret
= krb5_print_address(&a
, str
, len
, &len
);
842 krb5_free_address(context
, &a
);
845 snprintf(str
, len
, "<family=%d>", addr
->sa_family
);
848 static krb5_error_code
849 set_req_desc(struct MHD_Connection
*connection
,
851 struct bx509_request_desc
*r
)
853 const union MHD_ConnectionInfo
*ci
;
857 memset(r
, 0, sizeof(*r
));
858 (void) gettimeofday(&r
->tv_start
, NULL
);
860 ret
= get_krb5_context(&r
->context
);
861 r
->connection
= connection
;
862 r
->request
.data
= "<HTTP-REQUEST>";
863 r
->request
.length
= sizeof("<HTTP-REQUEST>");
864 r
->from
= r
->frombuf
;
865 r
->tgt_addresses
.len
= 0;
866 r
->tgt_addresses
.val
= 0;
867 r
->hcontext
= r
->context
->hcontext
;
871 r
->target
= r
->redir
= NULL
;
872 r
->pkix_store
= NULL
;
884 r
->kv
= heim_dict_create(10);
885 r
->attributes
= heim_dict_create(1);
886 ci
= MHD_get_connection_info(connection
,
887 MHD_CONNECTION_INFO_CLIENT_ADDRESS
);
889 r
->addr
= ci
->client_addr
;
890 addr_to_string(r
->context
, r
->addr
, r
->frombuf
, sizeof(r
->frombuf
));
893 heim_audit_addkv((heim_svc_req_desc
)r
, 0, "method", "GET");
894 heim_audit_addkv((heim_svc_req_desc
)r
, 0, "endpoint", "%s", r
->reqtype
);
895 token
= MHD_lookup_connection_value(r
->connection
, MHD_HEADER_KIND
,
896 MHD_HTTP_HEADER_AUTHORIZATION
);
897 if (token
&& r
->kv
) {
898 const char *token_end
;
900 if ((token_end
= strchr(token
, ' ')) == NULL
||
901 (token_end
- token
) > INT_MAX
|| (token_end
- token
) < 2)
902 heim_audit_addkv((heim_svc_req_desc
)r
, 0, "auth", "<unknown>");
904 heim_audit_addkv((heim_svc_req_desc
)r
, 0, "auth", "%.*s",
905 (int)(token_end
- token
), token
);
909 if (ret
== 0 && r
->kv
== NULL
) {
910 krb5_log_msg(r
->context
, logfac
, 1, NULL
, "Out of memory");
917 clean_req_desc(struct bx509_request_desc
*r
)
922 (void) unlink(strchr(r
->pkix_store
, ':') + 1);
923 krb5_free_addresses(r
->context
, &r
->tgt_addresses
);
924 hx509_request_free(&r
->req
);
925 heim_release(r
->reason
);
934 /* Implements GETs of /bx509 */
935 static krb5_error_code
936 bx509(struct bx509_request_desc
*r
)
941 /* Get required inputs */
942 csr
= MHD_lookup_connection_value(r
->connection
, MHD_GET_ARGUMENT_KIND
,
945 return bad_400(r
, EINVAL
, "CSR is missing");
947 if ((ret
= validate_token(r
)))
948 return ret
; /* validate_token() calls bad_req() */
950 if (r
->cname
== NULL
)
951 return bad_403(r
, EINVAL
,
952 "Could not extract principal name from token");
954 /* Parse CSR, add extensions from parameters, authorize, issue cert */
955 if ((ret
= do_CA(r
, csr
)))
958 /* Read and send the contents of the PKIX store */
959 krb5_log_msg(r
->context
, logfac
, 1, NULL
, "Issued certificate to %s",
961 return good_bx509(r
);
965 * princ_fs_encode_sz() and princ_fs_encode() encode a principal name to be
966 * safe for use as a file name. They function very much like URL encoders, but
967 * '~' and '.' also get encoded, and '@' does not.
969 * A corresponding decoder is not needed.
972 princ_fs_encode_sz(const char *in
)
974 size_t sz
= strlen(in
);
977 unsigned char c
= *(const unsigned char *)(in
++);
994 princ_fs_encode(const char *in
)
996 size_t len
= strlen(in
);
997 size_t sz
= princ_fs_encode_sz(in
);
1001 if ((s
= malloc(sz
+ 1)) == NULL
)
1005 for (i
= k
= 0; i
< len
; i
++) {
1019 s
[k
++] = "0123456789abcdef"[(c
&0xff)>>4];
1020 s
[k
++] = "0123456789abcdef"[(c
&0x0f)];
1029 * Find an existing, live ccache for `princ' in `cache_dir' or acquire Kerberos
1030 * creds for `princ' with PKINIT and put them in a ccache in `cache_dir'.
1032 static krb5_error_code
1033 find_ccache(krb5_context context
, const char *princ
, char **ccname
)
1035 krb5_error_code ret
= ENOMEM
;
1036 krb5_ccache cc
= NULL
;
1043 * Name the ccache after the principal. The principal may have special
1044 * characters in it, such as / or \ (path component separarot), or shell
1045 * special characters, so princ_fs_encode() it to make a ccache name.
1047 if ((s
= princ_fs_encode(princ
)) == NULL
||
1048 asprintf(ccname
, "FILE:%s/%s.cc", cache_dir
, s
) == -1 ||
1053 if ((ret
= krb5_cc_resolve(context
, *ccname
, &cc
))) {
1054 /* krb5_cc_resolve() suceeds even if the file doesn't exist */
1060 /* Check if we have a good enough credential */
1062 (ret
= krb5_cc_get_lifetime(context
, cc
, &life
)) == 0 && life
> 60) {
1063 krb5_cc_close(context
, cc
);
1067 krb5_cc_close(context
, cc
);
1068 return ret
? ret
: ENOENT
;
1071 enum k5_creds_kind
{ K5_CREDS_EPHEMERAL
, K5_CREDS_CACHED
};
1073 static krb5_error_code
1074 get_ccache(struct bx509_request_desc
*r
, krb5_ccache
*cc
, int *won
)
1076 krb5_error_code ret
= 0;
1077 struct stat st1
, st2
;
1078 char *temp_ccname
= NULL
;
1079 const char *fn
= NULL
;
1084 * Open and lock a .new ccache file. Use .new to avoid garbage files on
1087 * We can race with other threads to do this, so we loop until we
1088 * definitively win or definitely lose the race. We win when we have a) an
1089 * open FD that is b) flock'ed, and c) we observe with lstat() that the
1090 * file we opened and locked is the same as on disk after locking.
1092 * We don't close the FD until we're done.
1094 * If we had a proper anon MEMORY ccache, we could instead use that for a
1095 * temporary ccache, and then the initialization of and move to the final
1096 * FILE ccache would take care to mkstemp() and rename() into place.
1097 * fcc_open() basically does a similar thing.
1101 if (asprintf(&temp_ccname
, "%s.ccnew", r
->ccname
) == -1 ||
1102 temp_ccname
== NULL
)
1105 fn
= temp_ccname
+ sizeof("FILE:") - 1;
1108 * Open and flock the temp ccache file.
1110 * XXX We should really a) use _krb5_xlock(), or move that into
1111 * lib/roken anyways, b) abstract this loop into a utility function in
1120 ((fd
= open(fn
, O_RDWR
| O_CREAT
, 0600)) == -1 ||
1121 flock(fd
, LOCK_EX
) == -1 ||
1122 (lstat(fn
, &st1
) == -1 && errno
!= ENOENT
) ||
1123 fstat(fd
, &st2
) == -1))
1125 if (ret
== 0 && errno
== 0 &&
1126 st1
.st_dev
== st2
.st_dev
&& st1
.st_ino
== st2
.st_ino
) {
1127 if (S_ISREG(st1
.st_mode
))
1129 if (unlink(fn
) == -1)
1134 /* Check if we lost any race to acquire Kerberos creds */
1136 ret
= krb5_cc_resolve(r
->context
, temp_ccname
, cc
);
1138 ret
= krb5_cc_get_lifetime(r
->context
, *cc
, &life
);
1139 if (ret
== 0 && life
> 60)
1140 *won
= 0; /* We lost the race, but we win: we get to do less work */
1146 (void) close(fd
); /* Drops the flock */
1151 * Acquire credentials for `princ' using PKINIT and the PKIX credentials in
1152 * `pkix_store', then place the result in the ccache named `ccname' (which will
1153 * be in our own private `cache_dir').
1155 * XXX This function could be rewritten using gss_acquire_cred_from() and
1156 * gss_store_cred_into() provided we add new generic cred store key/value pairs
1159 static krb5_error_code
1160 do_pkinit(struct bx509_request_desc
*r
, enum k5_creds_kind kind
)
1162 krb5_get_init_creds_opt
*opt
= NULL
;
1163 krb5_init_creds_context ctx
= NULL
;
1164 krb5_error_code ret
= 0;
1165 krb5_ccache temp_cc
= NULL
;
1166 krb5_ccache cc
= NULL
;
1167 krb5_principal p
= NULL
;
1169 const char *cname
= r
->for_cname
? r
->for_cname
: r
->cname
;
1171 if (kind
== K5_CREDS_CACHED
) {
1174 ret
= get_ccache(r
, &temp_cc
, &won
);
1178 * We won the race to do PKINIT. Setup to acquire Kerberos creds with
1181 * We should really make sure that gss_acquire_cred_from() can do this
1182 * for us. We'd add generic cred store key/value pairs for PKIX cred
1183 * store, trust anchors, and so on, and acquire that way, then
1184 * gss_store_cred_into() to save it in a FILE ccache.
1187 ret
= krb5_cc_new_unique(r
->context
, "FILE", NULL
, &temp_cc
);
1190 ret
= krb5_parse_name(r
->context
, cname
, &p
);
1192 crealm
= krb5_principal_get_realm(r
->context
, p
);
1194 ret
= krb5_get_init_creds_opt_alloc(r
->context
, &opt
);
1196 krb5_get_init_creds_opt_set_default_flags(r
->context
, "kinit", crealm
,
1198 if (ret
== 0 && kind
== K5_CREDS_EPHEMERAL
&&
1199 !krb5_config_get_bool_default(r
->context
, NULL
, TRUE
,
1200 "get-tgt", "no_addresses", NULL
)) {
1201 krb5_addresses addr
;
1203 ret
= _krb5_parse_address_no_lookup(r
->context
, r
->frombuf
, &addr
);
1205 ret
= krb5_append_addresses(r
->context
, &r
->tgt_addresses
,
1208 if (ret
== 0 && r
->tgt_addresses
.len
== 0)
1209 ret
= krb5_get_init_creds_opt_set_addressless(r
->context
, opt
, 1);
1211 krb5_get_init_creds_opt_set_address_list(opt
, &r
->tgt_addresses
);
1213 ret
= krb5_get_init_creds_opt_set_pkinit(r
->context
, opt
, p
,
1215 NULL
, /* pkinit_anchor */
1216 NULL
, /* anchor_chain */
1217 NULL
, /* pkinit_crl */
1219 NULL
, /* prompter */
1220 NULL
, /* prompter data */
1221 NULL
/* password */);
1223 ret
= krb5_init_creds_init(r
->context
, p
,
1224 NULL
/* prompter */,
1225 NULL
/* prompter data */,
1230 * Finally, do the AS exchange w/ PKINIT, extract the new Kerberos creds
1231 * into temp_cc, and rename into place. Note that krb5_cc_move() closes
1232 * the source ccache, so we set temp_cc = NULL if it succeeds.
1235 ret
= krb5_init_creds_get(r
->context
, ctx
);
1237 ret
= krb5_init_creds_store(r
->context
, ctx
, temp_cc
);
1238 if (kind
== K5_CREDS_CACHED
) {
1240 ret
= krb5_cc_resolve(r
->context
, r
->ccname
, &cc
);
1242 ret
= krb5_cc_move(r
->context
, temp_cc
, cc
);
1245 } else if (ret
== 0 && kind
== K5_CREDS_EPHEMERAL
) {
1246 ret
= krb5_cc_get_full_name(r
->context
, temp_cc
, &r
->ccname
);
1251 krb5_init_creds_free(r
->context
, ctx
);
1252 krb5_get_init_creds_opt_free(r
->context
, opt
);
1253 krb5_free_principal(r
->context
, p
);
1254 krb5_cc_close(r
->context
, temp_cc
);
1255 krb5_cc_close(r
->context
, cc
);
1259 static krb5_error_code
1260 load_priv_key(krb5_context context
, const char *fn
, hx509_private_key
*key
)
1262 hx509_private_key
*keys
= NULL
;
1263 krb5_error_code ret
;
1264 hx509_certs certs
= NULL
;
1267 ret
= hx509_certs_init(context
->hx509ctx
, fn
, 0, NULL
, &certs
);
1271 ret
= _hx509_certs_keys_get(context
->hx509ctx
, certs
, &keys
);
1272 if (ret
== 0 && keys
[0] == NULL
)
1273 ret
= ENOENT
; /* XXX Better error please */
1275 *key
= _hx509_private_key_ref(keys
[0]);
1277 krb5_set_error_message(context
, ret
, "Could not load private "
1278 "impersonation key from %s for PKINIT: %s", fn
,
1279 hx509_get_error_string(context
->hx509ctx
, ret
));
1280 _hx509_certs_keys_free(context
->hx509ctx
, keys
);
1281 hx509_certs_free(&certs
);
1285 static krb5_error_code
1286 k5_do_CA(struct bx509_request_desc
*r
)
1288 SubjectPublicKeyInfo spki
;
1289 hx509_private_key key
= NULL
;
1290 krb5_error_code ret
= 0;
1291 krb5_principal p
= NULL
;
1292 hx509_request req
= NULL
;
1293 hx509_certs certs
= NULL
;
1294 KeyUsage ku
= int2KeyUsage(0);
1295 const char *cname
= r
->for_cname
? r
->for_cname
: r
->cname
;
1297 memset(&spki
, 0, sizeof(spki
));
1298 ku
.digitalSignature
= 1;
1300 /* Make a CSR (halfway -- we don't need to sign it here) */
1301 /* XXX Load impersonation key just once?? */
1302 ret
= load_priv_key(r
->context
, impersonation_key_fn
, &key
);
1304 ret
= hx509_request_init(r
->context
->hx509ctx
, &req
);
1306 ret
= krb5_parse_name(r
->context
, cname
, &p
);
1308 hx509_private_key2SPKI(r
->context
->hx509ctx
, key
, &spki
);
1310 hx509_request_set_SubjectPublicKeyInfo(r
->context
->hx509ctx
, req
,
1312 free_SubjectPublicKeyInfo(&spki
);
1314 ret
= hx509_request_add_pkinit(r
->context
->hx509ctx
, req
, cname
);
1316 ret
= hx509_request_add_eku(r
->context
->hx509ctx
, req
,
1317 &asn1_oid_id_pkekuoid
);
1319 /* Mark it authorized */
1321 ret
= hx509_request_authorize_san(req
, 0);
1323 ret
= hx509_request_authorize_eku(req
, 0);
1325 hx509_request_authorize_ku(req
, ku
);
1327 /* Issue the certificate */
1329 ret
= kdc_issue_certificate(r
->context
, "get-tgt", logfac
, req
, p
,
1330 &r
->token_times
, r
->req_life
,
1331 1 /* send_chain */, &certs
);
1332 krb5_free_principal(r
->context
, p
);
1333 hx509_request_free(&req
);
1336 if (ret
== KRB5KDC_ERR_POLICY
|| ret
== EACCES
) {
1337 hx509_private_key_free(&key
);
1338 return bad_403(r
, ret
,
1339 "Certificate request denied for policy reasons");
1341 if (ret
== ENOMEM
) {
1342 hx509_private_key_free(&key
);
1343 return bad_503(r
, ret
, "Certificate issuance failed");
1346 hx509_private_key_free(&key
);
1347 return bad_500(r
, ret
, "Certificate issuance failed");
1350 /* Setup PKIX store and extract the certificate chain into it */
1351 ret
= mk_pkix_store(&r
->pkix_store
);
1353 ret
= store_certs(r
->context
->hx509ctx
, r
->pkix_store
, certs
, key
);
1354 hx509_private_key_free(&key
);
1355 hx509_certs_free(&certs
);
1357 return bad_500(r
, ret
,
1358 "Could not create PEM store for issued certificate");
1362 /* Get impersonated Kerberos credentials for `cprinc' */
1363 static krb5_error_code
1364 k5_get_creds(struct bx509_request_desc
*r
, enum k5_creds_kind kind
)
1366 krb5_error_code ret
;
1367 const char *cname
= r
->for_cname
? r
->for_cname
: r
->cname
;
1369 /* If we have a live ccache for `cprinc', we're done */
1370 if (kind
== K5_CREDS_CACHED
&&
1371 (ret
= find_ccache(r
->context
, cname
, &r
->ccname
)) == 0)
1372 return ret
; /* Success */
1375 * Else we have to acquire a credential for them using their bearer token
1376 * for authentication (and our keytab / initiator credentials perhaps).
1378 if ((ret
= k5_do_CA(r
)))
1379 return ret
; /* k5_do_CA() calls bad_req() */
1381 if (ret
== 0 && (ret
= do_pkinit(r
, kind
)))
1382 ret
= bad_403(r
, ret
,
1383 "Could not acquire Kerberos credentials using PKINIT");
1387 /* Accumulate strings */
1389 acc_str(char **acc
, char *adds
, size_t addslen
)
1392 int l
= addslen
<= INT_MAX
? (int)addslen
: INT_MAX
;
1394 if (asprintf(&tmp
, "%s%s%.*s",
1396 *acc
? "; " : "", l
, adds
) > -1 &&
1404 fmt_gss_error(OM_uint32 code
, gss_OID mech
)
1406 gss_buffer_desc buf
;
1407 OM_uint32 major
, minor
;
1408 OM_uint32 type
= mech
== GSS_C_NO_OID
? GSS_C_GSS_CODE
: GSS_C_MECH_CODE
;
1413 major
= gss_display_status(&minor
, code
, type
, mech
, &more
, &buf
);
1414 if (!GSS_ERROR(major
))
1415 acc_str(&r
, (char *)buf
.value
, buf
.length
);
1416 gss_release_buffer(&minor
, &buf
);
1417 } while (!GSS_ERROR(major
) && more
);
1418 return r
? r
: "Out of memory while formatting GSS-API error";
1422 fmt_gss_errors(const char *r
, OM_uint32 major
, OM_uint32 minor
, gss_OID mech
)
1426 ma
= fmt_gss_error(major
, GSS_C_NO_OID
);
1427 mi
= mech
== GSS_C_NO_OID
? NULL
: fmt_gss_error(minor
, mech
);
1428 if (asprintf(&s
, "%s: %s%s%s", r
, ma
, mi
? ": " : "", mi
? mi
: "") > -1 &&
1439 static krb5_error_code
1440 bad_req_gss(struct bx509_request_desc
*r
,
1444 int http_status_code
,
1447 krb5_error_code ret
;
1448 char *msg
= fmt_gss_errors(reason
, major
, minor
, mech
);
1450 if (major
== GSS_S_BAD_NAME
|| major
== GSS_S_BAD_NAMETYPE
)
1451 http_status_code
= MHD_HTTP_BAD_REQUEST
;
1453 ret
= resp(r
, http_status_code
, MHD_RESPMEM_MUST_COPY
, NULL
,
1454 msg
, strlen(msg
), NULL
);
1459 /* Make an HTTP/Negotiate token */
1460 static krb5_error_code
1461 mk_nego_tok(struct bx509_request_desc
*r
,
1465 gss_key_value_element_desc kv
[1] = { { "ccache", r
->ccname
} };
1466 gss_key_value_set_desc store
= { 1, kv
};
1467 gss_buffer_desc token
= GSS_C_EMPTY_BUFFER
;
1468 gss_buffer_desc name
= GSS_C_EMPTY_BUFFER
;
1469 gss_cred_id_t cred
= GSS_C_NO_CREDENTIAL
;
1470 gss_ctx_id_t ctx
= GSS_C_NO_CONTEXT
;
1471 gss_name_t iname
= GSS_C_NO_NAME
;
1472 gss_name_t aname
= GSS_C_NO_NAME
;
1473 OM_uint32 major
, minor
, junk
;
1474 krb5_error_code ret
; /* More like a system error code here */
1475 const char *cname
= r
->for_cname
? r
->for_cname
: r
->cname
;
1476 char *token_b64
= NULL
;
1481 /* Import initiator name */
1482 name
.length
= strlen(cname
);
1483 name
.value
= rk_UNCONST(cname
);
1484 major
= gss_import_name(&minor
, &name
, GSS_KRB5_NT_PRINCIPAL_NAME
, &iname
);
1485 if (major
!= GSS_S_COMPLETE
)
1486 return bad_req_gss(r
, major
, minor
, GSS_C_NO_OID
,
1487 MHD_HTTP_SERVICE_UNAVAILABLE
,
1488 "Could not import cprinc parameter value as "
1489 "Kerberos principal name");
1491 /* Import target acceptor name */
1492 name
.length
= strlen(r
->target
);
1493 name
.value
= rk_UNCONST(r
->target
);
1494 major
= gss_import_name(&minor
, &name
, GSS_C_NT_HOSTBASED_SERVICE
, &aname
);
1495 if (major
!= GSS_S_COMPLETE
) {
1496 (void) gss_release_name(&junk
, &iname
);
1497 return bad_req_gss(r
, major
, minor
, GSS_C_NO_OID
,
1498 MHD_HTTP_SERVICE_UNAVAILABLE
,
1499 "Could not import target parameter value as "
1500 "Kerberos principal name");
1503 /* Acquire a credential from the given ccache */
1504 major
= gss_add_cred_from(&minor
, cred
, iname
, GSS_KRB5_MECHANISM
,
1505 GSS_C_INITIATE
, GSS_C_INDEFINITE
, 0, &store
,
1506 &cred
, NULL
, NULL
, NULL
);
1507 (void) gss_release_name(&junk
, &iname
);
1508 if (major
!= GSS_S_COMPLETE
) {
1509 (void) gss_release_name(&junk
, &aname
);
1510 return bad_req_gss(r
, major
, minor
, GSS_KRB5_MECHANISM
,
1511 MHD_HTTP_FORBIDDEN
, "Could not acquire credentials "
1512 "for requested cprinc");
1515 major
= gss_init_sec_context(&minor
, cred
, &ctx
, aname
,
1516 GSS_KRB5_MECHANISM
, 0, GSS_C_INDEFINITE
,
1517 NULL
, GSS_C_NO_BUFFER
, NULL
, &token
, NULL
,
1519 (void) gss_delete_sec_context(&junk
, &ctx
, GSS_C_NO_BUFFER
);
1520 (void) gss_release_name(&junk
, &aname
);
1521 (void) gss_release_cred(&junk
, &cred
);
1522 if (major
!= GSS_S_COMPLETE
)
1523 return bad_req_gss(r
, major
, minor
, GSS_KRB5_MECHANISM
,
1524 MHD_HTTP_SERVICE_UNAVAILABLE
, "Could not acquire "
1525 "Negotiate token for requested target");
1527 /* Encode token, output */
1528 ret
= rk_base64_encode(token
.value
, token
.length
, &token_b64
);
1529 (void) gss_release_buffer(&junk
, &token
);
1531 ret
= asprintf(nego_tok
, "Negotiate %s", token_b64
);
1533 if (ret
< 0 || *nego_tok
== NULL
)
1534 return bad_req(r
, errno
, MHD_HTTP_SERVICE_UNAVAILABLE
,
1535 "Could not allocate memory for encoding Negotiate "
1541 static krb5_error_code
1542 bnegotiate_get_target(struct bx509_request_desc
*r
)
1546 const char *referer
; /* misspelled on the wire, misspelled here, FYI */
1547 const char *authority
;
1548 const char *local_part
;
1552 target
= MHD_lookup_connection_value(r
->connection
, MHD_GET_ARGUMENT_KIND
,
1554 redir
= MHD_lookup_connection_value(r
->connection
, MHD_GET_ARGUMENT_KIND
,
1556 referer
= MHD_lookup_connection_value(r
->connection
, MHD_HEADER_KIND
,
1557 MHD_HTTP_HEADER_REFERER
);
1558 if (target
!= NULL
&& redir
== NULL
) {
1562 if (target
== NULL
&& redir
== NULL
)
1563 return bad_400(r
, EINVAL
,
1564 "Query missing 'target' or 'redirect' parameter value");
1565 if (target
!= NULL
&& redir
!= NULL
)
1566 return bad_403(r
, EACCES
,
1567 "Only one of 'target' or 'redirect' parameter allowed");
1568 if (redir
!= NULL
&& referer
== NULL
)
1569 return bad_403(r
, EACCES
,
1570 "Redirect request without Referer header nor allowed");
1572 if (strncmp(referer
, "https://", sizeof("https://") - 1) != 0 ||
1573 strncmp(redir
, "https://", sizeof("https://") - 1) != 0)
1574 return bad_403(r
, EACCES
,
1575 "Redirect requests permitted only for https referrers");
1577 /* Parse out authority from each URI, redirect and referrer */
1578 authority
= redir
+ sizeof("https://") - 1;
1579 if ((local_part
= strchr(authority
, '/')) == NULL
)
1580 local_part
= authority
+ strlen(authority
);
1581 if ((s1
= strndup(authority
, local_part
- authority
)) == NULL
)
1582 return bad_enomem(r
, ENOMEM
);
1584 authority
= referer
+ sizeof("https://") - 1;
1585 if ((local_part
= strchr(authority
, '/')) == NULL
)
1586 local_part
= authority
+ strlen(authority
);
1587 if ((s2
= strndup(authority
, local_part
- authority
)) == NULL
) {
1589 return bad_enomem(r
, ENOMEM
);
1592 /* Both must match */
1593 if (strcasecmp(s1
, s2
) != 0) {
1596 return bad_403(r
, EACCES
, "Redirect request does not match referer");
1600 if (strchr(s1
, '@')) {
1602 return bad_403(r
, EACCES
,
1603 "Redirect request authority has login information");
1606 /* Extract hostname portion of authority and format GSS name */
1607 if (strchr(s1
, ':'))
1608 *strchr(s1
, ':') = '\0';
1609 if (asprintf(&r
->freeme1
, "HTTP@%s", s1
) == -1 || r
->freeme1
== NULL
) {
1611 return bad_enomem(r
, ENOMEM
);
1614 r
->target
= r
->freeme1
;
1621 * Implements /bnegotiate end-point.
1623 * Query parameters (mutually exclusive):
1626 * - redirect=<URL-encoded-URL>
1628 * If the redirect query parameter is set then the Referer: header must be as
1629 * well, and the authority of the redirect and Referer URIs must be the same.
1631 static krb5_error_code
1632 bnegotiate(struct bx509_request_desc
*r
)
1634 krb5_error_code ret
;
1635 size_t nego_toksz
= 0;
1636 char *nego_tok
= NULL
;
1638 ret
= bnegotiate_get_target(r
);
1640 heim_audit_addkv((heim_svc_req_desc
)r
, KDC_AUDIT_VIS
, "target", "%s",
1641 r
->target
? r
->target
: "<unknown>");
1642 heim_audit_setkv_bool((heim_svc_req_desc
)r
, "redir", !!r
->redir
);
1643 ret
= validate_token(r
);
1645 /* bnegotiate_get_target() and validate_token() call bad_req() */
1650 * Make sure we have Kerberos credentials for cprinc. If we have them
1651 * cached from earlier, this will be fast (all local), else it will involve
1652 * taking a file lock and talking to the KDC using kx509 and PKINIT.
1654 * Perhaps we could use S4U instead, which would speed up the slow path a
1657 ret
= k5_get_creds(r
, K5_CREDS_CACHED
);
1661 /* Acquire the Negotiate token and output it */
1662 if (ret
== 0 && r
->ccname
!= NULL
)
1663 ret
= mk_nego_tok(r
, &nego_tok
, &nego_toksz
);
1666 /* Look ma', Negotiate as an OAuth-like token system! */
1668 ret
= resp(r
, MHD_HTTP_TEMPORARY_REDIRECT
, MHD_RESPMEM_PERSISTENT
,
1669 NULL
, "", 0, nego_tok
);
1671 ret
= resp(r
, MHD_HTTP_OK
, MHD_RESPMEM_MUST_COPY
,
1672 "application/x-negotiate-token", nego_tok
, nego_toksz
,
1680 static krb5_error_code
1681 authorize_TGT_REQ(struct bx509_request_desc
*r
)
1683 krb5_principal p
= NULL
;
1684 krb5_error_code ret
;
1685 const char *for_cname
= r
->for_cname
? r
->for_cname
: r
->cname
;
1687 if (for_cname
== r
->cname
|| strcmp(r
->cname
, r
->for_cname
) == 0)
1690 ret
= krb5_parse_name(r
->context
, r
->cname
, &p
);
1691 ret
= hx509_request_init(r
->context
->hx509ctx
, &r
->req
);
1693 return bad_500(r
, ret
, "Out of resources");
1694 heim_audit_addkv((heim_svc_req_desc
)r
, KDC_AUDIT_VIS
,
1695 "requested_krb5PrincipalName", "%s", for_cname
);
1696 ret
= hx509_request_add_eku(r
->context
->hx509ctx
, r
->req
,
1697 ASN1_OID_ID_PKEKUOID
);
1699 ret
= hx509_request_add_pkinit(r
->context
->hx509ctx
, r
->req
,
1702 ret
= kdc_authorize_csr(r
->context
, "get-tgt", r
->req
, p
);
1703 krb5_free_principal(r
->context
, p
);
1704 hx509_request_free(&r
->req
);
1706 return bad_403(r
, ret
, "Not authorized to requested TGT");
1710 static enum MHD_Result
1711 get_tgt_param_cb(void *d
,
1712 enum MHD_ValueKind kind
,
1716 struct bx509_request_desc
*r
= d
;
1718 if (strcmp(key
, "address") == 0 && val
) {
1719 if (!krb5_config_get_bool_default(r
->context
, NULL
,
1721 "get-tgt", "allow_addresses", NULL
)) {
1722 krb5_set_error_message(r
->context
, r
->ret
= ENOTSUP
,
1723 "Query parameter %s not allowed", key
);
1725 krb5_addresses addresses
;
1727 r
->ret
= _krb5_parse_address_no_lookup(r
->context
, val
,
1730 r
->ret
= krb5_append_addresses(r
->context
, &r
->tgt_addresses
,
1732 krb5_free_addresses(r
->context
, &addresses
);
1734 } else if (strcmp(key
, "cname") == 0) {
1735 /* Handled upstairs */
1737 } else if (strcmp(key
, "lifetime") == 0 && val
) {
1738 r
->req_life
= parse_time(val
, "day");
1740 /* Produce error for unknown params */
1741 heim_audit_setkv_bool((heim_svc_req_desc
)r
, "requested_unknown", TRUE
);
1742 krb5_set_error_message(r
->context
, r
->ret
= ENOTSUP
,
1743 "Query parameter %s not supported", key
);
1745 return r
->ret
== 0 ? MHD_YES
: MHD_NO
/* Stop iterating */;
1749 * Implements /get-tgt end-point.
1751 * Query parameters (mutually exclusive):
1753 * - cname=<name> (client principal name, if not the same as the authenticated
1754 * name, then this will be impersonated if allowed)
1756 static krb5_error_code
1757 get_tgt(struct bx509_request_desc
*r
)
1759 krb5_error_code ret
;
1764 r
->for_cname
= MHD_lookup_connection_value(r
->connection
,
1765 MHD_GET_ARGUMENT_KIND
, "cname");
1766 if (r
->for_cname
&& r
->for_cname
[0] == '\0')
1767 r
->for_cname
= NULL
;
1768 ret
= validate_token(r
);
1770 ret
= authorize_TGT_REQ(r
);
1771 /* validate_token() and authorize_TGT_REQ() call bad_req() */
1776 (void) MHD_get_connection_values(r
->connection
, MHD_GET_ARGUMENT_KIND
,
1777 get_tgt_param_cb
, r
);
1780 /* k5_get_creds() calls bad_req() */
1781 ret
= k5_get_creds(r
, K5_CREDS_EPHEMERAL
);
1785 fn
= strchr(r
->ccname
, ':');
1787 return bad_500(r
, ret
, "Impossible error");
1789 if ((errno
= rk_undumpdata(fn
, &body
, &bodylen
))) {
1791 return bad_503(r
, ret
, "Could not get TGT");
1794 ret
= resp(r
, MHD_HTTP_OK
, MHD_RESPMEM_MUST_COPY
,
1795 "application/x-krb5-ccache", body
, bodylen
, NULL
);
1800 static krb5_error_code
1801 health(const char *method
, struct bx509_request_desc
*r
)
1803 if (strcmp(method
, "HEAD") == 0)
1804 return resp(r
, MHD_HTTP_OK
, MHD_RESPMEM_PERSISTENT
, NULL
, "", 0, NULL
);
1805 return resp(r
, MHD_HTTP_OK
, MHD_RESPMEM_PERSISTENT
, NULL
,
1806 "To determine the health of the service, use the /bx509 "
1808 sizeof("To determine the health of the service, use the "
1809 "/bx509 end-point.\n") - 1, NULL
);
1813 /* Implements the entirety of this REST service */
1814 static enum MHD_Result
1816 struct MHD_Connection
*connection
,
1819 const char *version
,
1820 const char *upload_data
,
1821 size_t *upload_data_size
,
1824 static int aptr
= 0;
1825 struct bx509_request_desc r
;
1830 * This is the first call, right after headers were read.
1832 * We must return quickly so that any 100-Continue might be sent with
1835 * We'll get called again to really do the processing. If we handled
1836 * POSTs then we'd also get called with upload_data != NULL between the
1837 * first and last calls. We need to keep no state between the first
1838 * and last calls, but we do need to distinguish first and last call,
1839 * so we use the ctx argument for this.
1845 if ((ret
= set_req_desc(connection
, url
, &r
)))
1846 return bad_503(&r
, ret
, "Could not initialize request state");
1847 if ((strcmp(method
, "HEAD") == 0 || strcmp(method
, "GET") == 0) &&
1848 (strcmp(url
, "/health") == 0 || strcmp(url
, "/") == 0))
1849 ret
= health(method
, &r
);
1850 else if (strcmp(method
, "GET") != 0)
1851 ret
= bad_405(&r
, method
);
1852 else if (strcmp(url
, "/get-cert") == 0 ||
1853 strcmp(url
, "/bx509") == 0) /* old name */
1855 else if (strcmp(url
, "/get-negotiate-token") == 0 ||
1856 strcmp(url
, "/bnegotiate") == 0) /* old name */
1857 ret
= bnegotiate(&r
);
1858 else if (strcmp(url
, "/get-tgt") == 0)
1861 ret
= bad_404(&r
, url
);
1864 return ret
== -1 ? MHD_NO
: MHD_YES
;
1867 static struct getargs args
[] = {
1868 { "help", 'h', arg_flag
, &help_flag
, "Print usage message", NULL
},
1869 { "version", '\0', arg_flag
, &version_flag
, "Print version", NULL
},
1870 { NULL
, 'H', arg_strings
, &audiences
,
1871 "expected token audience(s) of bx509 service", "HOSTNAME" },
1872 { "daemon", 'd', arg_flag
, &daemonize
, "daemonize", "daemonize" },
1873 { "daemon-child", 0, arg_flag
, &daemon_child_fd
, NULL
, NULL
}, /* priv */
1874 { "reverse-proxied", 0, arg_flag
, &reverse_proxied_flag
,
1875 "reverse proxied", "listen on 127.0.0.1 and do not use TLS" },
1876 { NULL
, 'p', arg_integer
, &port
, "PORT", "port number (default: 443)" },
1877 { "cache-dir", 0, arg_string
, &cache_dir
,
1878 "cache directory", "DIRECTORY" },
1879 { "cert", 0, arg_string
, &cert_file
,
1880 "certificate file path (PEM)", "HX509-STORE" },
1881 { "private-key", 0, arg_string
, &priv_key_file
,
1882 "private key file path (PEM)", "HX509-STORE" },
1883 { "thread-per-client", 't', arg_flag
, &thread_per_client_flag
,
1884 "thread per-client", "use thread per-client" },
1885 { "verbose", 'v', arg_counter
, &verbose_counter
, "verbose", "run verbosely" }
1891 arg_printusage(args
, sizeof(args
) / sizeof(args
[0]), "bx509",
1892 "\nServes RESTful GETs of /bx509 and /bnegotiate,\n"
1893 "performing corresponding kx509 and, possibly, PKINIT requests\n"
1894 "to the KDCs of the requested realms (or just the given REALM).\n");
1898 static int sigpipe
[2] = { -1, -1 };
1904 while (write(sigpipe
[1], &c
, sizeof(c
)) == -1 && errno
== EINTR
)
1909 bx509_openlog(krb5_context context
,
1911 krb5_log_facility
**fac
)
1913 char **s
= NULL
, **p
;
1915 krb5_initlog(context
, "bx509d", fac
);
1916 s
= krb5_config_get_strings(context
, NULL
, svc
, "logging", NULL
);
1918 s
= krb5_config_get_strings(context
, NULL
, "logging", svc
, NULL
);
1921 krb5_addlog_dest(context
, *fac
, *p
);
1922 krb5_config_free_strings(s
);
1925 if (asprintf(&ss
, "0-1/FILE:%s/%s", hdb_db_dir(context
),
1927 err(1, "out of memory");
1928 krb5_addlog_dest(context
, *fac
, ss
);
1931 krb5_set_warn_dest(context
, *fac
);
1934 static const char *sysplugin_dirs
[] = {
1938 "$ORIGIN/../lib/plugin/kdc",
1941 LIBDIR
"/plugin/kdc",
1947 load_plugins(krb5_context context
)
1949 const char * const *dirs
= sysplugin_dirs
;
1953 cfdirs
= krb5_config_get_strings(context
, NULL
, "kdc", "plugin_dir", NULL
);
1955 dirs
= (const char * const *)cfdirs
;
1959 _krb5_load_plugins(context
, "kdc", (const char **)dirs
);
1962 krb5_config_free_strings(cfdirs
);
1967 main(int argc
, char **argv
)
1969 unsigned int flags
= MHD_USE_THREAD_PER_CONNECTION
; /* XXX */
1970 struct sockaddr_in sin
;
1971 struct MHD_Daemon
*previous
= NULL
;
1972 struct MHD_Daemon
*current
= NULL
;
1973 struct sigaction sa
;
1974 krb5_context context
= NULL
;
1975 MHD_socket sock
= MHD_INVALID_SOCKET
;
1976 char *priv_key_pem
= NULL
;
1977 char *cert_pem
= NULL
;
1982 setprogname("bx509d");
1983 if (getarg(args
, sizeof(args
) / sizeof(args
[0]), argc
, argv
, &optidx
))
1988 print_version(NULL
);
1991 if (argc
> optidx
) /* Add option to set a URI local part prefix? */
1994 errx(1, "Port number must be given");
1996 if (audiences
.num_strings
== 0) {
1997 char localhost
[MAXHOSTNAMELEN
];
1999 ret
= gethostname(localhost
, sizeof(localhost
));
2001 errx(1, "Could not determine local hostname; use --audience");
2003 if ((audiences
.strings
=
2004 calloc(1, sizeof(audiences
.strings
[0]))) == NULL
||
2005 (audiences
.strings
[0] = strdup(localhost
)) == NULL
)
2006 err(1, "Out of memory");
2007 audiences
.num_strings
= 1;
2010 if (daemonize
&& daemon_child_fd
== -1)
2011 daemon_child_fd
= roken_detach_prep(argc
, argv
, "--daemon-child");
2017 if ((errno
= pthread_key_create(&k5ctx
, k5_free_context
)))
2018 err(1, "Could not create thread-specific storage");
2020 if ((errno
= get_krb5_context(&context
)))
2021 err(1, "Could not init krb5 context");
2023 bx509_openlog(context
, "bx509d", &logfac
);
2024 load_plugins(context
);
2026 if (cache_dir
== NULL
) {
2029 if (asprintf(&s
, "%s/bx509d-XXXXXX",
2030 getenv("TMPDIR") ? getenv("TMPDIR") : "/tmp") == -1 ||
2032 (cache_dir
= mkdtemp(s
)) == NULL
)
2033 err(1, "could not create temporary cache directory");
2034 if (verbose_counter
)
2035 fprintf(stderr
, "Note: using %s as cache directory\n", cache_dir
);
2036 atexit(rm_cache_dir
);
2037 setenv("TMPDIR", cache_dir
, 1);
2040 generate_key(context
->hx509ctx
, "impersonation", "rsa", 2048, &impersonation_key_fn
);
2043 if (cert_file
&& !priv_key_file
)
2044 priv_key_file
= cert_file
;
2047 hx509_cursor cursor
= NULL
;
2048 hx509_certs certs
= NULL
;
2049 hx509_cert cert
= NULL
;
2050 time_t min_cert_life
= 0;
2054 ret
= hx509_certs_init(context
->hx509ctx
, cert_file
, 0, NULL
, &certs
);
2056 ret
= hx509_certs_start_seq(context
->hx509ctx
, certs
, &cursor
);
2058 (ret
= hx509_certs_next_cert(context
->hx509ctx
, certs
,
2059 cursor
, &cert
)) == 0 && cert
) {
2060 time_t notAfter
= 0;
2062 if (!hx509_cert_have_private_key_only(cert
) &&
2063 (notAfter
= hx509_cert_get_notAfter(cert
)) <= time(NULL
) + 30)
2064 errx(1, "One or more certificates in %s are expired",
2067 notAfter
-= time(NULL
);
2069 warnx("One or more certificates in %s expire soon",
2071 /* Reload 5 minutes prior to expiration */
2072 if (notAfter
< min_cert_life
|| min_cert_life
< 1)
2073 min_cert_life
= notAfter
;
2075 hx509_cert_free(cert
);
2078 (void) hx509_certs_end_seq(context
->hx509ctx
, certs
, cursor
);
2079 if (min_cert_life
> 4)
2080 alarm(min_cert_life
>> 1);
2081 hx509_certs_free(&certs
);
2083 hx509_err(context
->hx509ctx
, 1, ret
,
2084 "could not read certificate from %s", cert_file
);
2086 if ((errno
= rk_undumpdata(cert_file
, &s
, &len
)) ||
2087 (cert_pem
= strndup(s
, len
)) == NULL
)
2088 err(1, "could not read certificate from %s", cert_file
);
2089 if (strlen(cert_pem
) != len
)
2090 err(1, "NULs in certificate file contents: %s", cert_file
);
2094 if (priv_key_file
) {
2098 if ((errno
= rk_undumpdata(priv_key_file
, &s
, &len
)) ||
2099 (priv_key_pem
= strndup(s
, len
)) == NULL
)
2100 err(1, "could not read private key from %s", priv_key_file
);
2101 if (strlen(priv_key_pem
) != len
)
2102 err(1, "NULs in private key file contents: %s", priv_key_file
);
2106 if (verbose_counter
> 1)
2107 flags
|= MHD_USE_DEBUG
;
2108 if (thread_per_client_flag
)
2109 flags
|= MHD_USE_THREAD_PER_CONNECTION
;
2112 if (pipe(sigpipe
) == -1)
2113 err(1, "Could not set up key/cert reloading");
2114 memset(&sa
, 0, sizeof(sa
));
2115 sa
.sa_handler
= sighandler
;
2116 if (reverse_proxied_flag
) {
2118 * We won't use TLS in the reverse proxy case, so no need to reload
2119 * certs. But we'll still read them if given, and alarm() will get
2122 (void) signal(SIGHUP
, SIG_IGN
);
2123 (void) signal(SIGUSR1
, SIG_IGN
);
2124 (void) signal(SIGALRM
, SIG_IGN
);
2126 (void) sigaction(SIGHUP
, &sa
, NULL
); /* Reload key & cert */
2127 (void) sigaction(SIGUSR1
, &sa
, NULL
); /* Reload key & cert */
2128 (void) sigaction(SIGALRM
, &sa
, NULL
); /* Reload key & cert */
2130 (void) sigaction(SIGINT
, &sa
, NULL
); /* Graceful shutdown */
2131 (void) sigaction(SIGTERM
, &sa
, NULL
); /* Graceful shutdown */
2132 (void) signal(SIGPIPE
, SIG_IGN
);
2135 sock
= MHD_quiesce_daemon(previous
);
2137 if (reverse_proxied_flag
) {
2139 * XXX IPv6 too. Create the sockets and tell MHD_start_daemon() about
2142 sin
.sin_addr
.s_addr
= htonl(INADDR_LOOPBACK
);
2143 sin
.sin_family
= AF_INET
;
2144 sin
.sin_port
= htons(port
);
2145 current
= MHD_start_daemon(flags
, port
,
2147 route
, (char *)NULL
,
2148 MHD_OPTION_SOCK_ADDR
, &sin
,
2149 MHD_OPTION_CONNECTION_LIMIT
, (unsigned int)200,
2150 MHD_OPTION_CONNECTION_TIMEOUT
, (unsigned int)10,
2152 } else if (sock
!= MHD_INVALID_SOCKET
) {
2154 * Certificate/key rollover: reuse the listen socket returned by
2155 * MHD_quiesce_daemon().
2157 current
= MHD_start_daemon(flags
| MHD_USE_SSL
, port
,
2159 route
, (char *)NULL
,
2160 MHD_OPTION_HTTPS_MEM_KEY
, priv_key_pem
,
2161 MHD_OPTION_HTTPS_MEM_CERT
, cert_pem
,
2162 MHD_OPTION_CONNECTION_LIMIT
, (unsigned int)200,
2163 MHD_OPTION_CONNECTION_TIMEOUT
, (unsigned int)10,
2164 MHD_OPTION_LISTEN_SOCKET
, sock
,
2166 sock
= MHD_INVALID_SOCKET
;
2168 current
= MHD_start_daemon(flags
| MHD_USE_SSL
, port
,
2170 route
, (char *)NULL
,
2171 MHD_OPTION_HTTPS_MEM_KEY
, priv_key_pem
,
2172 MHD_OPTION_HTTPS_MEM_CERT
, cert_pem
,
2173 MHD_OPTION_CONNECTION_LIMIT
, (unsigned int)200,
2174 MHD_OPTION_CONNECTION_TIMEOUT
, (unsigned int)10,
2177 if (current
== NULL
)
2178 err(1, "Could not start bx509 REST service");
2181 MHD_stop_daemon(previous
);
2185 if (verbose_counter
)
2186 fprintf(stderr
, "Ready!\n");
2187 if (daemon_child_fd
!= -1)
2188 roken_detach_finish(NULL
, daemon_child_fd
);
2190 /* Wait for signal, possibly SIGALRM, to reload certs and/or exit */
2191 while ((ret
= read(sigpipe
[0], &sig
, sizeof(sig
))) == -1 &&
2197 priv_key_pem
= NULL
;
2200 if (ret
== 1 && (sig
== SIGHUP
|| sig
== SIGUSR1
|| sig
== SIGALRM
)) {
2201 /* Reload certs and restart service gracefully */
2207 MHD_stop_daemon(current
);
2208 _krb5_unload_plugins(context
, "kdc");
2209 pthread_key_delete(k5ctx
);