2 * Copyright (c) 2003 - 2008 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
6 * Portions Copyright (c) 2009 Apple Inc. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the Institute nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
40 #include <heim_asn1.h>
41 #include <rfc2459_asn1.h>
43 #include <pkinit_asn1.h>
46 #include "crypto-headers.h"
48 struct pk_client_params
{
49 enum krb5_pk_type type
;
50 enum { USE_RSA
, USE_DH
, USE_ECDH
} keyex
;
65 EncryptionKey reply_key
;
68 hx509_certs client_anchors
;
69 hx509_verify_ctx verify_ctx
;
72 struct pk_principal_mapping
{
74 struct pk_allowed_princ
{
75 krb5_principal principal
;
80 static struct krb5_pk_identity
*kdc_identity
;
81 static struct pk_principal_mapping principal_mappings
;
82 static struct krb5_dh_moduli
**moduli
;
94 static krb5_error_code
95 pk_check_pkauthenticator_win2k(krb5_context context
,
96 PKAuthenticator_Win2k
*a
,
101 krb5_timeofday (context
, &now
);
104 if (a
->ctime
== 0 || labs(a
->ctime
- now
) > context
->max_skew
) {
105 krb5_clear_error_message(context
);
106 return KRB5KRB_AP_ERR_SKEW
;
111 static krb5_error_code
112 pk_check_pkauthenticator(krb5_context context
,
123 krb5_timeofday (context
, &now
);
126 if (a
->ctime
== 0 || labs(a
->ctime
- now
) > context
->max_skew
) {
127 krb5_clear_error_message(context
);
128 return KRB5KRB_AP_ERR_SKEW
;
131 ASN1_MALLOC_ENCODE(KDC_REQ_BODY
, buf
, buf_size
, &req
->req_body
, &len
, ret
);
133 krb5_clear_error_message(context
);
137 krb5_abortx(context
, "Internal error in ASN.1 encoder");
139 ret
= krb5_create_checksum(context
,
148 krb5_clear_error_message(context
);
152 if (a
->paChecksum
== NULL
) {
153 krb5_clear_error_message(context
);
154 ret
= KRB5_KDC_ERR_PA_CHECKSUM_MUST_BE_INCLUDED
;
158 if (der_heim_octet_string_cmp(a
->paChecksum
, &checksum
.checksum
) != 0) {
159 krb5_clear_error_message(context
);
160 ret
= KRB5KRB_ERR_GENERIC
;
164 free_Checksum(&checksum
);
170 _kdc_pk_free_client_param(krb5_context context
, pk_client_params
*cp
)
175 hx509_cert_free(cp
->cert
);
177 hx509_verify_destroy_ctx(cp
->verify_ctx
);
178 if (cp
->keyex
== USE_DH
) {
180 DH_free(cp
->u
.dh
.key
);
181 if (cp
->u
.dh
.public_key
)
182 BN_free(cp
->u
.dh
.public_key
);
185 if (cp
->keyex
== USE_ECDH
) {
187 EC_KEY_free(cp
->u
.ecdh
.key
);
188 if (cp
->u
.ecdh
.public_key
)
189 EC_KEY_free(cp
->u
.ecdh
.public_key
);
192 krb5_free_keyblock_contents(context
, &cp
->reply_key
);
193 if (cp
->dh_group_name
)
194 free(cp
->dh_group_name
);
196 hx509_peer_info_free(cp
->peer
);
197 if (cp
->client_anchors
)
198 hx509_certs_free(&cp
->client_anchors
);
199 memset(cp
, 0, sizeof(*cp
));
203 static krb5_error_code
204 generate_dh_keyblock(krb5_context context
,
205 pk_client_params
*client_params
,
206 krb5_enctype enctype
)
208 unsigned char *dh_gen_key
= NULL
;
211 size_t dh_gen_keylen
, size
;
213 memset(&key
, 0, sizeof(key
));
215 if (client_params
->keyex
== USE_DH
) {
217 if (client_params
->u
.dh
.public_key
== NULL
) {
218 ret
= KRB5KRB_ERR_GENERIC
;
219 krb5_set_error_message(context
, ret
, "public_key");
223 if (!DH_generate_key(client_params
->u
.dh
.key
)) {
224 ret
= KRB5KRB_ERR_GENERIC
;
225 krb5_set_error_message(context
, ret
,
226 "Can't generate Diffie-Hellman keys");
230 size
= DH_size(client_params
->u
.dh
.key
);
232 dh_gen_key
= malloc(size
);
233 if (dh_gen_key
== NULL
) {
235 krb5_set_error_message(context
, ret
, "malloc: out of memory");
239 dh_gen_keylen
= DH_compute_key(dh_gen_key
,client_params
->u
.dh
.public_key
, client_params
->u
.dh
.key
);
240 if (dh_gen_keylen
== (size_t)-1) {
241 ret
= KRB5KRB_ERR_GENERIC
;
242 krb5_set_error_message(context
, ret
,
243 "Can't compute Diffie-Hellman key");
246 if (dh_gen_keylen
< size
) {
247 size
-= dh_gen_keylen
;
248 memmove(dh_gen_key
+ size
, dh_gen_key
, dh_gen_keylen
);
249 memset(dh_gen_key
, 0, size
);
254 } else if (client_params
->keyex
== USE_ECDH
) {
256 if (client_params
->u
.ecdh
.public_key
== NULL
) {
257 ret
= KRB5KRB_ERR_GENERIC
;
258 krb5_set_error_message(context
, ret
, "public_key");
262 client_params
->u
.ecdh
.key
= EC_KEY_new();
263 if (client_params
->u
.ecdh
.key
== NULL
) {
267 EC_KEY_set_group(client_params
->u
.ecdh
.key
,
268 EC_KEY_get0_group(client_params
->u
.ecdh
.public_key
));
270 if (EC_KEY_generate_key(client_params
->u
.ecdh
.key
) != 1) {
275 size
= (EC_GROUP_get_degree(EC_KEY_get0_group(client_params
->u
.ecdh
.key
)) + 7) / 8;
276 dh_gen_key
= malloc(size
);
277 if (dh_gen_key
== NULL
) {
279 krb5_set_error_message(context
, ret
,
280 N_("malloc: out of memory", ""));
284 dh_gen_keylen
= ECDH_compute_key(dh_gen_key
, size
,
285 EC_KEY_get0_public_key(client_params
->u
.ecdh
.public_key
),
286 client_params
->u
.ecdh
.key
, NULL
);
288 #endif /* HAVE_OPENSSL */
290 ret
= KRB5KRB_ERR_GENERIC
;
291 krb5_set_error_message(context
, ret
,
292 "Diffie-Hellman not selected keys");
296 ret
= _krb5_pk_octetstring2key(context
,
298 dh_gen_key
, dh_gen_keylen
,
300 &client_params
->reply_key
);
305 if (key
.keyvalue
.data
)
306 krb5_free_keyblock_contents(context
, &key
);
312 integer_to_BN(krb5_context context
, const char *field
, heim_integer
*f
)
316 bn
= BN_bin2bn((const unsigned char *)f
->data
, f
->length
, NULL
);
318 krb5_set_error_message(context
, KRB5_BADMSGTYPE
,
319 "PKINIT: parsing BN failed %s", field
);
322 BN_set_negative(bn
, f
->negative
);
326 static krb5_error_code
327 get_dh_param(krb5_context context
,
328 krb5_kdc_configuration
*config
,
329 SubjectPublicKeyInfo
*dh_key_info
,
330 pk_client_params
*client_params
)
332 DomainParameters dhparam
;
336 memset(&dhparam
, 0, sizeof(dhparam
));
338 if ((dh_key_info
->subjectPublicKey
.length
% 8) != 0) {
339 ret
= KRB5_BADMSGTYPE
;
340 krb5_set_error_message(context
, ret
,
341 "PKINIT: subjectPublicKey not aligned "
342 "to 8 bit boundary");
346 if (dh_key_info
->algorithm
.parameters
== NULL
) {
347 krb5_set_error_message(context
, KRB5_BADMSGTYPE
,
348 "PKINIT missing algorithm parameter "
349 "in clientPublicValue");
350 return KRB5_BADMSGTYPE
;
353 ret
= decode_DomainParameters(dh_key_info
->algorithm
.parameters
->data
,
354 dh_key_info
->algorithm
.parameters
->length
,
358 krb5_set_error_message(context
, ret
, "Can't decode algorithm "
359 "parameters in clientPublicValue");
363 ret
= _krb5_dh_group_ok(context
, config
->pkinit_dh_min_bits
,
364 &dhparam
.p
, &dhparam
.g
, dhparam
.q
, moduli
,
365 &client_params
->dh_group_name
);
367 /* XXX send back proposal of better group */
374 krb5_set_error_message(context
, ret
, "Cannot create DH structure");
377 ret
= KRB5_BADMSGTYPE
;
378 dh
->p
= integer_to_BN(context
, "DH prime", &dhparam
.p
);
381 dh
->g
= integer_to_BN(context
, "DH base", &dhparam
.g
);
386 dh
->q
= integer_to_BN(context
, "DH p-1 factor", dhparam
.q
);
395 ret
= decode_DHPublicKey(dh_key_info
->subjectPublicKey
.data
,
396 dh_key_info
->subjectPublicKey
.length
/ 8,
400 krb5_clear_error_message(context
);
404 client_params
->u
.dh
.public_key
= integer_to_BN(context
,
407 der_free_heim_integer(&glue
);
408 if (client_params
->u
.dh
.public_key
== NULL
) {
409 ret
= KRB5_BADMSGTYPE
;
414 client_params
->u
.dh
.key
= dh
;
421 free_DomainParameters(&dhparam
);
427 static krb5_error_code
428 get_ecdh_param(krb5_context context
,
429 krb5_kdc_configuration
*config
,
430 SubjectPublicKeyInfo
*dh_key_info
,
431 pk_client_params
*client_params
)
434 EC_KEY
*public = NULL
;
436 const unsigned char *p
;
440 if (dh_key_info
->algorithm
.parameters
== NULL
) {
441 krb5_set_error_message(context
, KRB5_BADMSGTYPE
,
442 "PKINIT missing algorithm parameter "
443 "in clientPublicValue");
444 return KRB5_BADMSGTYPE
;
447 memset(&ecp
, 0, sizeof(ecp
));
449 ret
= decode_ECParameters(dh_key_info
->algorithm
.parameters
->data
,
450 dh_key_info
->algorithm
.parameters
->length
, &ecp
, &len
);
454 if (ecp
.element
!= choice_ECParameters_namedCurve
) {
455 ret
= KRB5_BADMSGTYPE
;
459 if (der_heim_oid_cmp(&ecp
.u
.namedCurve
, &asn1_oid_id_ec_group_secp256r1
) == 0)
460 nid
= NID_X9_62_prime256v1
;
462 ret
= KRB5_BADMSGTYPE
;
466 /* XXX verify group is ok */
468 public = EC_KEY_new_by_curve_name(nid
);
470 p
= dh_key_info
->subjectPublicKey
.data
;
471 len
= dh_key_info
->subjectPublicKey
.length
/ 8;
472 if (o2i_ECPublicKey(&public, &p
, len
) == NULL
) {
473 ret
= KRB5_BADMSGTYPE
;
474 krb5_set_error_message(context
, ret
,
475 "PKINIT failed to decode ECDH key");
478 client_params
->u
.ecdh
.public_key
= public;
484 free_ECParameters(&ecp
);
488 #endif /* HAVE_OPENSSL */
491 _kdc_pk_rd_padata(krb5_context context
,
492 krb5_kdc_configuration
*config
,
495 hdb_entry_ex
*client
,
496 pk_client_params
**ret_params
)
498 pk_client_params
*cp
;
500 heim_oid eContentType
= { 0, NULL
}, contentInfoOid
= { 0, NULL
};
501 krb5_data eContent
= { 0, NULL
};
502 krb5_data signed_content
= { 0, NULL
};
503 const char *type
= "unknown type";
504 hx509_certs trust_anchors
;
506 const HDB_Ext_PKINIT_cert
*pc
;
510 if (!config
->enable_pkinit
) {
511 kdc_log(context
, config
, 0, "PK-INIT request but PK-INIT not enabled");
512 krb5_clear_error_message(context
);
516 cp
= calloc(1, sizeof(*cp
));
518 krb5_clear_error_message(context
);
523 ret
= hx509_certs_init(context
->hx509ctx
,
524 "MEMORY:trust-anchors",
525 0, NULL
, &trust_anchors
);
527 krb5_set_error_message(context
, ret
, "failed to create trust anchors");
531 ret
= hx509_certs_merge(context
->hx509ctx
, trust_anchors
,
532 kdc_identity
->anchors
);
534 hx509_certs_free(&trust_anchors
);
535 krb5_set_error_message(context
, ret
, "failed to create verify context");
539 /* Add any registered certificates for this client as trust anchors */
540 ret
= hdb_entry_get_pkinit_cert(&client
->entry
, &pc
);
541 if (ret
== 0 && pc
!= NULL
) {
545 for (i
= 0; i
< pc
->len
; i
++) {
546 cert
= hx509_cert_init_data(context
->hx509ctx
,
547 pc
->val
[i
].cert
.data
,
548 pc
->val
[i
].cert
.length
,
552 hx509_certs_add(context
->hx509ctx
, trust_anchors
, cert
);
553 hx509_cert_free(cert
);
557 ret
= hx509_verify_init_ctx(context
->hx509ctx
, &cp
->verify_ctx
);
559 hx509_certs_free(&trust_anchors
);
560 krb5_set_error_message(context
, ret
, "failed to create verify context");
564 hx509_verify_set_time(cp
->verify_ctx
, kdc_time
);
565 hx509_verify_attach_anchors(cp
->verify_ctx
, trust_anchors
);
566 hx509_certs_free(&trust_anchors
);
568 if (config
->pkinit_allow_proxy_certs
)
569 hx509_verify_set_proxy_certificate(cp
->verify_ctx
, 1);
571 if (pa
->padata_type
== KRB5_PADATA_PK_AS_REQ_WIN
) {
572 PA_PK_AS_REQ_Win2k r
;
574 type
= "PK-INIT-Win2k";
576 if (_kdc_is_anon_request(&req
->req_body
)) {
577 ret
= KRB5_KDC_ERR_PUBLIC_KEY_ENCRYPTION_NOT_SUPPORTED
;
578 krb5_set_error_message(context
, ret
,
579 "Anon not supported in RSA mode");
583 ret
= decode_PA_PK_AS_REQ_Win2k(pa
->padata_value
.data
,
584 pa
->padata_value
.length
,
588 krb5_set_error_message(context
, ret
, "Can't decode "
589 "PK-AS-REQ-Win2k: %d", ret
);
593 ret
= hx509_cms_unwrap_ContentInfo(&r
.signed_auth_pack
,
597 free_PA_PK_AS_REQ_Win2k(&r
);
599 krb5_set_error_message(context
, ret
,
600 "Can't unwrap ContentInfo(win): %d", ret
);
604 } else if (pa
->padata_type
== KRB5_PADATA_PK_AS_REQ
) {
607 type
= "PK-INIT-IETF";
609 ret
= decode_PA_PK_AS_REQ(pa
->padata_value
.data
,
610 pa
->padata_value
.length
,
614 krb5_set_error_message(context
, ret
,
615 "Can't decode PK-AS-REQ: %d", ret
);
619 /* XXX look at r.kdcPkId */
620 if (r
.trustedCertifiers
) {
621 ExternalPrincipalIdentifiers
*edi
= r
.trustedCertifiers
;
622 unsigned int i
, maxedi
;
624 ret
= hx509_certs_init(context
->hx509ctx
,
625 "MEMORY:client-anchors",
627 &cp
->client_anchors
);
629 krb5_set_error_message(context
, ret
,
630 "Can't allocate client anchors: %d",
636 * If the client sent more then 10 EDI, don't bother
637 * looking more then 10 of performance reasons.
642 for (i
= 0; i
< maxedi
; i
++) {
643 IssuerAndSerialNumber iasn
;
648 if (edi
->val
[i
].issuerAndSerialNumber
== NULL
)
651 ret
= hx509_query_alloc(context
->hx509ctx
, &q
);
653 krb5_set_error_message(context
, ret
,
654 "Failed to allocate hx509_query");
658 ret
= decode_IssuerAndSerialNumber(edi
->val
[i
].issuerAndSerialNumber
->data
,
659 edi
->val
[i
].issuerAndSerialNumber
->length
,
663 hx509_query_free(context
->hx509ctx
, q
);
666 ret
= hx509_query_match_issuer_serial(q
, &iasn
.issuer
, &iasn
.serialNumber
);
667 free_IssuerAndSerialNumber(&iasn
);
669 hx509_query_free(context
->hx509ctx
, q
);
673 ret
= hx509_certs_find(context
->hx509ctx
,
677 hx509_query_free(context
->hx509ctx
, q
);
680 hx509_certs_add(context
->hx509ctx
,
681 cp
->client_anchors
, cert
);
682 hx509_cert_free(cert
);
686 ret
= hx509_cms_unwrap_ContentInfo(&r
.signedAuthPack
,
690 free_PA_PK_AS_REQ(&r
);
692 krb5_set_error_message(context
, ret
,
693 "Can't unwrap ContentInfo: %d", ret
);
698 krb5_clear_error_message(context
);
699 ret
= KRB5KDC_ERR_PADATA_TYPE_NOSUPP
;
703 ret
= der_heim_oid_cmp(&contentInfoOid
, &asn1_oid_id_pkcs7_signedData
);
705 ret
= KRB5KRB_ERR_GENERIC
;
706 krb5_set_error_message(context
, ret
,
707 "PK-AS-REQ-Win2k invalid content type oid");
712 ret
= KRB5KRB_ERR_GENERIC
;
713 krb5_set_error_message(context
, ret
,
714 "PK-AS-REQ-Win2k no signed auth pack");
719 hx509_certs signer_certs
;
720 int flags
= HX509_CMS_VS_ALLOW_DATA_OID_MISMATCH
; /* BTMM */
722 if (_kdc_is_anon_request(&req
->req_body
))
723 flags
|= HX509_CMS_VS_ALLOW_ZERO_SIGNER
;
725 ret
= hx509_cms_verify_signed(context
->hx509ctx
,
729 signed_content
.length
,
731 kdc_identity
->certpool
,
736 char *s
= hx509_get_error_string(context
->hx509ctx
, ret
);
737 krb5_warnx(context
, "PKINIT: failed to verify signature: %s: %d",
744 ret
= hx509_get_one_cert(context
->hx509ctx
, signer_certs
,
746 hx509_certs_free(&signer_certs
);
752 /* Signature is correct, now verify the signed message */
753 if (der_heim_oid_cmp(&eContentType
, &asn1_oid_id_pkcs7_data
) != 0 &&
754 der_heim_oid_cmp(&eContentType
, &asn1_oid_id_pkauthdata
) != 0)
756 ret
= KRB5_BADMSGTYPE
;
757 krb5_set_error_message(context
, ret
, "got wrong oid for pkauthdata");
761 if (pa
->padata_type
== KRB5_PADATA_PK_AS_REQ_WIN
) {
764 ret
= decode_AuthPack_Win2k(eContent
.data
,
769 krb5_set_error_message(context
, ret
,
770 "Can't decode AuthPack: %d", ret
);
774 ret
= pk_check_pkauthenticator_win2k(context
,
778 free_AuthPack_Win2k(&ap
);
782 cp
->type
= PKINIT_WIN2K
;
783 cp
->nonce
= ap
.pkAuthenticator
.nonce
;
785 if (ap
.clientPublicValue
) {
786 ret
= KRB5KRB_ERR_GENERIC
;
787 krb5_set_error_message(context
, ret
,
788 "DH not supported for windows");
791 free_AuthPack_Win2k(&ap
);
793 } else if (pa
->padata_type
== KRB5_PADATA_PK_AS_REQ
) {
796 ret
= decode_AuthPack(eContent
.data
,
801 krb5_set_error_message(context
, ret
,
802 "Can't decode AuthPack: %d", ret
);
807 if (_kdc_is_anon_request(&req
->req_body
) &&
808 ap
.clientPublicValue
== NULL
) {
810 ret
= KRB5_KDC_ERR_PUBLIC_KEY_ENCRYPTION_NOT_SUPPORTED
;
811 krb5_set_error_message(context
, ret
,
812 "Anon not supported in RSA mode");
816 ret
= pk_check_pkauthenticator(context
,
824 cp
->type
= PKINIT_27
;
825 cp
->nonce
= ap
.pkAuthenticator
.nonce
;
827 if (ap
.clientPublicValue
) {
828 if (der_heim_oid_cmp(&ap
.clientPublicValue
->algorithm
.algorithm
, &asn1_oid_id_dhpublicnumber
) == 0) {
830 ret
= get_dh_param(context
, config
,
831 ap
.clientPublicValue
, cp
);
833 } else if (der_heim_oid_cmp(&ap
.clientPublicValue
->algorithm
.algorithm
, &asn1_oid_id_ecPublicKey
) == 0) {
834 cp
->keyex
= USE_ECDH
;
835 ret
= get_ecdh_param(context
, config
,
836 ap
.clientPublicValue
, cp
);
837 #endif /* HAVE_OPENSSL */
839 ret
= KRB5_BADMSGTYPE
;
840 krb5_set_error_message(context
, ret
, "PKINIT unknown DH mechanism");
849 ret
= hx509_peer_info_alloc(context
->hx509ctx
,
856 if (ap
.supportedCMSTypes
) {
857 ret
= hx509_peer_info_set_cms_algs(context
->hx509ctx
,
859 ap
.supportedCMSTypes
->val
,
860 ap
.supportedCMSTypes
->len
);
866 /* assume old client */
867 hx509_peer_info_add_cms_alg(context
->hx509ctx
, cp
->peer
,
868 hx509_crypto_des_rsdi_ede3_cbc());
869 hx509_peer_info_add_cms_alg(context
->hx509ctx
, cp
->peer
,
870 hx509_signature_rsa_with_sha1());
871 hx509_peer_info_add_cms_alg(context
->hx509ctx
, cp
->peer
,
872 hx509_signature_sha1());
876 krb5_abortx(context
, "internal pkinit error");
878 kdc_log(context
, config
, 0, "PK-INIT request of type %s", type
);
882 krb5_warn(context
, ret
, "PKINIT");
884 if (signed_content
.data
)
885 free(signed_content
.data
);
886 krb5_data_free(&eContent
);
887 der_free_oid(&eContentType
);
888 der_free_oid(&contentInfoOid
);
890 _kdc_pk_free_client_param(context
, cp
);
900 static krb5_error_code
901 BN_to_integer(krb5_context context
, BIGNUM
*bn
, heim_integer
*integer
)
903 integer
->length
= BN_num_bytes(bn
);
904 integer
->data
= malloc(integer
->length
);
905 if (integer
->data
== NULL
) {
906 krb5_clear_error_message(context
);
909 BN_bn2bin(bn
, integer
->data
);
910 integer
->negative
= BN_is_negative(bn
);
914 static krb5_error_code
915 pk_mk_pa_reply_enckey(krb5_context context
,
916 krb5_kdc_configuration
*config
,
917 pk_client_params
*cp
,
919 const krb5_data
*req_buffer
,
920 krb5_keyblock
*reply_key
,
921 ContentInfo
*content_info
,
922 hx509_cert
*kdc_cert
)
924 const heim_oid
*envelopedAlg
= NULL
, *sdAlg
= NULL
, *evAlg
= NULL
;
926 krb5_data buf
, signed_data
;
930 krb5_data_zero(&buf
);
931 krb5_data_zero(&signed_data
);
936 * If the message client is a win2k-type but it send pa data
937 * 09-binding it expects a IETF (checksum) reply so there can be
944 if (_kdc_find_padata(req
, &i
, KRB5_PADATA_PK_AS_09_BINDING
) == NULL
945 && config
->pkinit_require_binding
== 0)
949 sdAlg
= &asn1_oid_id_pkcs7_data
;
950 evAlg
= &asn1_oid_id_pkcs7_data
;
951 envelopedAlg
= &asn1_oid_id_rsadsi_des_ede3_cbc
;
955 sdAlg
= &asn1_oid_id_pkrkeydata
;
956 evAlg
= &asn1_oid_id_pkcs7_signedData
;
959 krb5_abortx(context
, "internal pkinit error");
963 ReplyKeyPack_Win2k kp
;
964 memset(&kp
, 0, sizeof(kp
));
966 ret
= copy_EncryptionKey(reply_key
, &kp
.replyKey
);
968 krb5_clear_error_message(context
);
971 kp
.nonce
= cp
->nonce
;
973 ASN1_MALLOC_ENCODE(ReplyKeyPack_Win2k
,
974 buf
.data
, buf
.length
,
976 free_ReplyKeyPack_Win2k(&kp
);
978 krb5_crypto ascrypto
;
980 memset(&kp
, 0, sizeof(kp
));
982 ret
= copy_EncryptionKey(reply_key
, &kp
.replyKey
);
984 krb5_clear_error_message(context
);
988 ret
= krb5_crypto_init(context
, reply_key
, 0, &ascrypto
);
990 krb5_clear_error_message(context
);
994 ret
= krb5_create_checksum(context
, ascrypto
, 6, 0,
995 req_buffer
->data
, req_buffer
->length
,
998 krb5_clear_error_message(context
);
1002 ret
= krb5_crypto_destroy(context
, ascrypto
);
1004 krb5_clear_error_message(context
);
1007 ASN1_MALLOC_ENCODE(ReplyKeyPack
, buf
.data
, buf
.length
, &kp
, &size
,ret
);
1008 free_ReplyKeyPack(&kp
);
1011 krb5_set_error_message(context
, ret
, "ASN.1 encoding of ReplyKeyPack "
1012 "failed (%d)", ret
);
1015 if (buf
.length
!= size
)
1016 krb5_abortx(context
, "Internal ASN.1 encoder error");
1022 ret
= hx509_query_alloc(context
->hx509ctx
, &q
);
1026 hx509_query_match_option(q
, HX509_QUERY_OPTION_PRIVATE_KEY
);
1027 if (config
->pkinit_kdc_friendly_name
)
1028 hx509_query_match_friendly_name(q
, config
->pkinit_kdc_friendly_name
);
1030 ret
= hx509_certs_find(context
->hx509ctx
,
1031 kdc_identity
->certs
,
1034 hx509_query_free(context
->hx509ctx
, q
);
1038 ret
= hx509_cms_create_signed_1(context
->hx509ctx
,
1047 kdc_identity
->certpool
,
1052 krb5_data_free(&buf
);
1056 if (cp
->type
== PKINIT_WIN2K
) {
1057 ret
= hx509_cms_wrap_ContentInfo(&asn1_oid_id_pkcs7_signedData
,
1062 krb5_data_free(&signed_data
);
1066 ret
= hx509_cms_envelope_1(context
->hx509ctx
,
1067 HX509_CMS_EV_NO_KU_CHECK
,
1069 signed_data
.data
, signed_data
.length
,
1075 ret
= _krb5_pk_mk_ContentInfo(context
,
1077 &asn1_oid_id_pkcs7_envelopedData
,
1080 if (ret
&& *kdc_cert
) {
1081 hx509_cert_free(*kdc_cert
);
1085 krb5_data_free(&buf
);
1086 krb5_data_free(&signed_data
);
1094 static krb5_error_code
1095 pk_mk_pa_reply_dh(krb5_context context
,
1096 krb5_kdc_configuration
*config
,
1097 pk_client_params
*cp
,
1098 ContentInfo
*content_info
,
1099 hx509_cert
*kdc_cert
)
1101 KDCDHKeyInfo dh_info
;
1102 krb5_data signed_data
, buf
;
1103 ContentInfo contentinfo
;
1104 krb5_error_code ret
;
1109 memset(&contentinfo
, 0, sizeof(contentinfo
));
1110 memset(&dh_info
, 0, sizeof(dh_info
));
1111 krb5_data_zero(&signed_data
);
1112 krb5_data_zero(&buf
);
1116 if (cp
->keyex
== USE_DH
) {
1117 DH
*kdc_dh
= cp
->u
.dh
.key
;
1120 ret
= BN_to_integer(context
, kdc_dh
->pub_key
, &i
);
1124 ASN1_MALLOC_ENCODE(DHPublicKey
, buf
.data
, buf
.length
, &i
, &size
, ret
);
1125 der_free_heim_integer(&i
);
1127 krb5_set_error_message(context
, ret
, "ASN.1 encoding of "
1128 "DHPublicKey failed (%d)", ret
);
1131 if (buf
.length
!= size
)
1132 krb5_abortx(context
, "Internal ASN.1 encoder error");
1134 dh_info
.subjectPublicKey
.length
= buf
.length
* 8;
1135 dh_info
.subjectPublicKey
.data
= buf
.data
;
1136 krb5_data_zero(&buf
);
1138 } else if (cp
->keyex
== USE_ECDH
) {
1142 len
= i2o_ECPublicKey(cp
->u
.ecdh
.key
, NULL
);
1150 dh_info
.subjectPublicKey
.length
= len
* 8;
1151 dh_info
.subjectPublicKey
.data
= p
;
1153 len
= i2o_ECPublicKey(cp
->u
.ecdh
.key
, &p
);
1158 krb5_abortx(context
, "no keyex selected ?");
1161 dh_info
.nonce
= cp
->nonce
;
1163 ASN1_MALLOC_ENCODE(KDCDHKeyInfo
, buf
.data
, buf
.length
, &dh_info
, &size
,
1166 krb5_set_error_message(context
, ret
, "ASN.1 encoding of "
1167 "KdcDHKeyInfo failed (%d)", ret
);
1170 if (buf
.length
!= size
)
1171 krb5_abortx(context
, "Internal ASN.1 encoder error");
1174 * Create the SignedData structure and sign the KdcDHKeyInfo
1178 ret
= hx509_query_alloc(context
->hx509ctx
, &q
);
1182 hx509_query_match_option(q
, HX509_QUERY_OPTION_PRIVATE_KEY
);
1183 if (config
->pkinit_kdc_friendly_name
)
1184 hx509_query_match_friendly_name(q
, config
->pkinit_kdc_friendly_name
);
1186 ret
= hx509_certs_find(context
->hx509ctx
,
1187 kdc_identity
->certs
,
1190 hx509_query_free(context
->hx509ctx
, q
);
1194 ret
= hx509_cms_create_signed_1(context
->hx509ctx
,
1196 &asn1_oid_id_pkdhkeydata
,
1203 kdc_identity
->certpool
,
1206 kdc_log(context
, config
, 0, "Failed signing the DH* reply: %d", ret
);
1211 ret
= _krb5_pk_mk_ContentInfo(context
,
1213 &asn1_oid_id_pkcs7_signedData
,
1219 if (ret
&& *kdc_cert
) {
1220 hx509_cert_free(*kdc_cert
);
1224 krb5_data_free(&buf
);
1225 krb5_data_free(&signed_data
);
1226 free_KDCDHKeyInfo(&dh_info
);
1236 _kdc_pk_mk_pa_reply(krb5_context context
,
1237 krb5_kdc_configuration
*config
,
1238 pk_client_params
*cp
,
1239 const hdb_entry_ex
*client
,
1240 krb5_enctype sessionetype
,
1242 const krb5_data
*req_buffer
,
1243 krb5_keyblock
*reply_key
,
1244 krb5_keyblock
*sessionkey
,
1247 krb5_error_code ret
;
1249 size_t len
= 0, size
= 0;
1250 krb5_enctype enctype
;
1252 hx509_cert kdc_cert
= NULL
;
1255 if (!config
->enable_pkinit
) {
1256 krb5_clear_error_message(context
);
1260 if (req
->req_body
.etype
.len
> 0) {
1261 for (i
= 0; i
< req
->req_body
.etype
.len
; i
++)
1262 if (krb5_enctype_valid(context
, req
->req_body
.etype
.val
[i
]) == 0)
1264 if (req
->req_body
.etype
.len
<= i
) {
1265 ret
= KRB5KRB_ERR_GENERIC
;
1266 krb5_set_error_message(context
, ret
,
1267 "No valid enctype available from client");
1270 enctype
= req
->req_body
.etype
.val
[i
];
1272 enctype
= ETYPE_DES3_CBC_SHA1
;
1274 if (cp
->type
== PKINIT_27
) {
1276 const char *type
, *other
= "";
1278 memset(&rep
, 0, sizeof(rep
));
1280 pa_type
= KRB5_PADATA_PK_AS_REP
;
1282 if (cp
->keyex
== USE_RSA
) {
1287 rep
.element
= choice_PA_PK_AS_REP_encKeyPack
;
1289 ret
= krb5_generate_random_keyblock(context
, enctype
,
1292 free_PA_PK_AS_REP(&rep
);
1295 ret
= pk_mk_pa_reply_enckey(context
,
1304 free_PA_PK_AS_REP(&rep
);
1307 ASN1_MALLOC_ENCODE(ContentInfo
, rep
.u
.encKeyPack
.data
,
1308 rep
.u
.encKeyPack
.length
, &info
, &size
,
1310 free_ContentInfo(&info
);
1312 krb5_set_error_message(context
, ret
, "encoding of Key ContentInfo "
1314 free_PA_PK_AS_REP(&rep
);
1317 if (rep
.u
.encKeyPack
.length
!= size
)
1318 krb5_abortx(context
, "Internal ASN.1 encoder error");
1320 ret
= krb5_generate_random_keyblock(context
, sessionetype
,
1323 free_PA_PK_AS_REP(&rep
);
1330 switch (cp
->keyex
) {
1331 case USE_DH
: type
= "dh"; break;
1333 case USE_ECDH
: type
= "ecdh"; break;
1335 default: krb5_abortx(context
, "unknown keyex"); break;
1338 if (cp
->dh_group_name
)
1339 other
= cp
->dh_group_name
;
1341 rep
.element
= choice_PA_PK_AS_REP_dhInfo
;
1343 ret
= generate_dh_keyblock(context
, cp
, enctype
);
1347 ret
= pk_mk_pa_reply_dh(context
, config
,
1352 free_PA_PK_AS_REP(&rep
);
1353 krb5_set_error_message(context
, ret
,
1354 "create pa-reply-dh "
1359 ASN1_MALLOC_ENCODE(ContentInfo
, rep
.u
.dhInfo
.dhSignedData
.data
,
1360 rep
.u
.dhInfo
.dhSignedData
.length
, &info
, &size
,
1362 free_ContentInfo(&info
);
1364 krb5_set_error_message(context
, ret
,
1365 "encoding of Key ContentInfo "
1367 free_PA_PK_AS_REP(&rep
);
1370 if (rep
.u
.encKeyPack
.length
!= size
)
1371 krb5_abortx(context
, "Internal ASN.1 encoder error");
1373 /* generate the session key using the method from RFC6112 */
1375 krb5_keyblock kdc_contribution_key
;
1376 krb5_crypto reply_crypto
;
1377 krb5_crypto kdccont_crypto
;
1378 krb5_data p1
= { strlen("PKINIT"), "PKINIT"};
1379 krb5_data p2
= { strlen("KEYEXCHANGE"), "KEYEXCHANGE"};
1386 ret
= krb5_generate_random_keyblock(context
, sessionetype
,
1387 &kdc_contribution_key
);
1389 free_PA_PK_AS_REP(&rep
);
1392 ret
= krb5_crypto_init(context
, &cp
->reply_key
, enctype
, &reply_crypto
);
1394 krb5_free_keyblock_contents(context
, &kdc_contribution_key
);
1395 free_PA_PK_AS_REP(&rep
);
1398 ret
= krb5_crypto_init(context
, &kdc_contribution_key
, sessionetype
, &kdccont_crypto
);
1400 krb5_crypto_destroy(context
, reply_crypto
);
1401 krb5_free_keyblock_contents(context
, &kdc_contribution_key
);
1402 free_PA_PK_AS_REP(&rep
);
1406 ret
= krb5_crypto_fx_cf2(context
, kdccont_crypto
, reply_crypto
,
1407 &p1
, &p2
, sessionetype
, sessionkey
);
1408 krb5_crypto_destroy(context
, kdccont_crypto
);
1410 krb5_crypto_destroy(context
, reply_crypto
);
1411 krb5_free_keyblock_contents(context
, &kdc_contribution_key
);
1412 free_PA_PK_AS_REP(&rep
);
1415 ASN1_MALLOC_ENCODE(EncryptionKey
, kckdata
, kcklen
,
1416 &kdc_contribution_key
, &size
, ret
);
1417 krb5_free_keyblock_contents(context
, &kdc_contribution_key
);
1419 krb5_set_error_message(context
, ret
, "encoding of PKINIT-KX Key failed %d", ret
);
1420 krb5_crypto_destroy(context
, reply_crypto
);
1421 free_PA_PK_AS_REP(&rep
);
1425 krb5_abortx(context
, "Internal ASN.1 encoder error");
1426 ret
= krb5_encrypt_EncryptedData(context
, reply_crypto
, KRB5_KU_PA_PKINIT_KX
,
1427 kckdata
, kcklen
, 0, &kx
);
1428 krb5_crypto_destroy(context
, reply_crypto
);
1431 free_PA_PK_AS_REP(&rep
);
1434 ASN1_MALLOC_ENCODE(EncryptedData
, kxdata
, kxlen
,
1436 free_EncryptedData(&kx
);
1438 krb5_set_error_message(context
, ret
, "encoding of PKINIT-KX failed %d", ret
);
1439 free_PA_PK_AS_REP(&rep
);
1443 krb5_abortx(context
, "Internal ASN.1 encoder error");
1444 /* Add PA-PKINIT-KX */
1445 ret
= krb5_padata_add(context
, md
, KRB5_PADATA_PKINIT_KX
, kxdata
, kxlen
);
1447 krb5_set_error_message(context
, ret
,
1448 "Failed adding PKINIT-KX %d", ret
);
1455 #define use_btmm_with_enckey 0
1456 if (use_btmm_with_enckey
&& rep
.element
== choice_PA_PK_AS_REP_encKeyPack
) {
1457 PA_PK_AS_REP_BTMM btmm
;
1460 any
.data
= rep
.u
.encKeyPack
.data
;
1461 any
.length
= rep
.u
.encKeyPack
.length
;
1463 btmm
.dhSignedData
= NULL
;
1464 btmm
.encKeyPack
= &any
;
1466 ASN1_MALLOC_ENCODE(PA_PK_AS_REP_BTMM
, buf
, len
, &btmm
, &size
, ret
);
1468 ASN1_MALLOC_ENCODE(PA_PK_AS_REP
, buf
, len
, &rep
, &size
, ret
);
1471 free_PA_PK_AS_REP(&rep
);
1473 krb5_set_error_message(context
, ret
,
1474 "encode PA-PK-AS-REP failed %d", ret
);
1478 krb5_abortx(context
, "Internal ASN.1 encoder error");
1480 kdc_log(context
, config
, 0, "PK-INIT using %s %s", type
, other
);
1482 } else if (cp
->type
== PKINIT_WIN2K
) {
1483 PA_PK_AS_REP_Win2k rep
;
1486 if (cp
->keyex
!= USE_RSA
) {
1487 ret
= KRB5KRB_ERR_GENERIC
;
1488 krb5_set_error_message(context
, ret
,
1489 "Windows PK-INIT doesn't support DH");
1493 memset(&rep
, 0, sizeof(rep
));
1495 pa_type
= KRB5_PADATA_PK_AS_REP_19
;
1496 rep
.element
= choice_PA_PK_AS_REP_Win2k_encKeyPack
;
1498 ret
= krb5_generate_random_keyblock(context
, enctype
,
1501 free_PA_PK_AS_REP_Win2k(&rep
);
1504 ret
= pk_mk_pa_reply_enckey(context
,
1513 free_PA_PK_AS_REP_Win2k(&rep
);
1516 ASN1_MALLOC_ENCODE(ContentInfo
, rep
.u
.encKeyPack
.data
,
1517 rep
.u
.encKeyPack
.length
, &info
, &size
,
1519 free_ContentInfo(&info
);
1521 krb5_set_error_message(context
, ret
, "encoding of Key ContentInfo "
1523 free_PA_PK_AS_REP_Win2k(&rep
);
1526 if (rep
.u
.encKeyPack
.length
!= size
)
1527 krb5_abortx(context
, "Internal ASN.1 encoder error");
1529 ASN1_MALLOC_ENCODE(PA_PK_AS_REP_Win2k
, buf
, len
, &rep
, &size
, ret
);
1530 free_PA_PK_AS_REP_Win2k(&rep
);
1532 krb5_set_error_message(context
, ret
,
1533 "encode PA-PK-AS-REP-Win2k failed %d", ret
);
1537 krb5_abortx(context
, "Internal ASN.1 encoder error");
1539 ret
= krb5_generate_random_keyblock(context
, sessionetype
,
1547 krb5_abortx(context
, "PK-INIT internal error");
1550 ret
= krb5_padata_add(context
, md
, pa_type
, buf
, len
);
1552 krb5_set_error_message(context
, ret
,
1553 "Failed adding PA-PK-AS-REP %d", ret
);
1558 if (config
->pkinit_kdc_ocsp_file
) {
1560 if (ocsp
.expire
== 0 && ocsp
.next_update
> kdc_time
) {
1564 krb5_data_free(&ocsp
.data
);
1567 ocsp
.next_update
= kdc_time
+ 60 * 5;
1569 fd
= open(config
->pkinit_kdc_ocsp_file
, O_RDONLY
);
1571 kdc_log(context
, config
, 0,
1572 "PK-INIT failed to open ocsp data file %d", errno
);
1575 ret
= fstat(fd
, &sb
);
1579 kdc_log(context
, config
, 0,
1580 "PK-INIT failed to stat ocsp data %d", ret
);
1584 ret
= krb5_data_alloc(&ocsp
.data
, sb
.st_size
);
1587 kdc_log(context
, config
, 0,
1588 "PK-INIT failed to stat ocsp data %d", ret
);
1591 ocsp
.data
.length
= sb
.st_size
;
1592 ret
= read(fd
, ocsp
.data
.data
, sb
.st_size
);
1594 if (ret
!= sb
.st_size
) {
1595 kdc_log(context
, config
, 0,
1596 "PK-INIT failed to read ocsp data %d", errno
);
1600 ret
= hx509_ocsp_verify(context
->hx509ctx
,
1604 ocsp
.data
.data
, ocsp
.data
.length
,
1607 kdc_log(context
, config
, 0,
1608 "PK-INIT failed to verify ocsp data %d", ret
);
1609 krb5_data_free(&ocsp
.data
);
1611 } else if (ocsp
.expire
> 180) {
1612 ocsp
.expire
-= 180; /* refetch the ocsp before it expire */
1613 ocsp
.next_update
= ocsp
.expire
;
1615 ocsp
.next_update
= kdc_time
;
1621 if (ocsp
.expire
!= 0 && ocsp
.expire
> kdc_time
) {
1623 ret
= krb5_padata_add(context
, md
,
1624 KRB5_PADATA_PA_PK_OCSP_RESPONSE
,
1625 ocsp
.data
.data
, ocsp
.data
.length
);
1627 krb5_set_error_message(context
, ret
,
1628 "Failed adding OCSP response %d", ret
);
1636 hx509_cert_free(kdc_cert
);
1639 ret
= krb5_copy_keyblock_contents(context
, &cp
->reply_key
, reply_key
);
1644 match_rfc_san(krb5_context context
,
1645 krb5_kdc_configuration
*config
,
1646 hx509_context hx509ctx
,
1647 hx509_cert client_cert
,
1648 krb5_const_principal match
)
1650 hx509_octet_string_list list
;
1654 memset(&list
, 0 , sizeof(list
));
1656 ret
= hx509_cert_find_subjectAltName_otherName(hx509ctx
,
1658 &asn1_oid_id_pkinit_san
,
1663 for (i
= 0; !found
&& i
< list
.len
; i
++) {
1664 krb5_principal_data principal
;
1665 KRB5PrincipalName kn
;
1668 ret
= decode_KRB5PrincipalName(list
.val
[i
].data
,
1672 const char *msg
= krb5_get_error_message(context
, ret
);
1673 kdc_log(context
, config
, 0,
1674 "Decoding kerberos name in certificate failed: %s", msg
);
1675 krb5_free_error_message(context
, msg
);
1678 if (size
!= list
.val
[i
].length
) {
1679 kdc_log(context
, config
, 0,
1680 "Decoding kerberos name have extra bits on the end");
1681 return KRB5_KDC_ERR_CLIENT_NAME_MISMATCH
;
1684 memset(&principal
, 0, sizeof (principal
));
1685 principal
.name
= kn
.principalName
;
1686 principal
.realm
= kn
.realm
;
1688 if (krb5_principal_compare(context
, &principal
, match
) == TRUE
)
1690 free_KRB5PrincipalName(&kn
);
1694 hx509_free_octet_string_list(&list
);
1699 return KRB5_KDC_ERR_CLIENT_NAME_MISMATCH
;
1705 match_ms_upn_san(krb5_context context
,
1706 krb5_kdc_configuration
*config
,
1707 hx509_context hx509ctx
,
1708 hx509_cert client_cert
,
1710 hdb_entry_ex
*client
)
1712 hx509_octet_string_list list
;
1713 krb5_principal principal
= NULL
;
1718 memset(&list
, 0 , sizeof(list
));
1720 ret
= hx509_cert_find_subjectAltName_otherName(hx509ctx
,
1722 &asn1_oid_id_pkinit_ms_san
,
1727 if (list
.len
!= 1) {
1728 kdc_log(context
, config
, 0,
1729 "More then one PK-INIT MS UPN SAN");
1730 ret
= KRB5_KDC_ERR_CLIENT_NAME_MISMATCH
;
1734 ret
= decode_MS_UPN_SAN(list
.val
[0].data
, list
.val
[0].length
, &upn
, &size
);
1736 kdc_log(context
, config
, 0, "Decode of MS-UPN-SAN failed");
1739 if (size
!= list
.val
[0].length
) {
1740 free_MS_UPN_SAN(&upn
);
1741 kdc_log(context
, config
, 0, "Trailing data in ");
1742 ret
= KRB5_KDC_ERR_CLIENT_NAME_MISMATCH
;
1746 kdc_log(context
, config
, 0, "found MS UPN SAN: %s", upn
);
1748 ret
= krb5_parse_name(context
, upn
, &principal
);
1749 free_MS_UPN_SAN(&upn
);
1751 kdc_log(context
, config
, 0, "Failed to parse principal in MS UPN SAN");
1755 if (clientdb
->hdb_check_pkinit_ms_upn_match
) {
1756 ret
= clientdb
->hdb_check_pkinit_ms_upn_match(context
, clientdb
, client
, principal
);
1760 * This is very wrong, but will do for a fallback
1762 strupr(principal
->realm
);
1764 if (krb5_principal_compare(context
, principal
, client
->entry
.principal
) == FALSE
)
1765 ret
= KRB5_KDC_ERR_CLIENT_NAME_MISMATCH
;
1770 krb5_free_principal(context
, principal
);
1771 hx509_free_octet_string_list(&list
);
1777 _kdc_pk_check_client(krb5_context context
,
1778 krb5_kdc_configuration
*config
,
1780 hdb_entry_ex
*client
,
1781 pk_client_params
*cp
,
1782 char **subject_name
)
1784 const HDB_Ext_PKINIT_acl
*acl
;
1785 const HDB_Ext_PKINIT_cert
*pc
;
1786 krb5_error_code ret
;
1790 if (cp
->cert
== NULL
) {
1792 *subject_name
= strdup("anonymous client client");
1793 if (*subject_name
== NULL
)
1798 ret
= hx509_cert_get_base_subject(context
->hx509ctx
,
1804 ret
= hx509_name_to_string(name
, subject_name
);
1805 hx509_name_free(&name
);
1809 kdc_log(context
, config
, 0,
1810 "Trying to authorize PK-INIT subject DN %s",
1813 ret
= hdb_entry_get_pkinit_cert(&client
->entry
, &pc
);
1814 if (ret
== 0 && pc
) {
1818 for (j
= 0; j
< pc
->len
; j
++) {
1819 cert
= hx509_cert_init_data(context
->hx509ctx
,
1820 pc
->val
[j
].cert
.data
,
1821 pc
->val
[j
].cert
.length
,
1825 ret
= hx509_cert_cmp(cert
, cp
->cert
);
1826 hx509_cert_free(cert
);
1828 kdc_log(context
, config
, 5,
1829 "Found matching PK-INIT cert in hdb");
1836 if (config
->pkinit_princ_in_cert
) {
1837 ret
= match_rfc_san(context
, config
,
1840 client
->entry
.principal
);
1842 kdc_log(context
, config
, 5,
1843 "Found matching PK-INIT SAN in certificate");
1846 ret
= match_ms_upn_san(context
, config
,
1852 kdc_log(context
, config
, 5,
1853 "Found matching MS UPN SAN in certificate");
1858 ret
= hdb_entry_get_pkinit_acl(&client
->entry
, &acl
);
1859 if (ret
== 0 && acl
!= NULL
) {
1861 * Cheat here and compare the generated name with the string
1862 * and not the reverse.
1864 for (i
= 0; i
< acl
->len
; i
++) {
1865 if (strcmp(*subject_name
, acl
->val
[0].subject
) != 0)
1868 /* Don't support isser and anchor checking right now */
1869 if (acl
->val
[0].issuer
)
1871 if (acl
->val
[0].anchor
)
1874 kdc_log(context
, config
, 5,
1875 "Found matching PK-INIT database ACL");
1880 for (i
= 0; i
< principal_mappings
.len
; i
++) {
1883 b
= krb5_principal_compare(context
,
1884 client
->entry
.principal
,
1885 principal_mappings
.val
[i
].principal
);
1888 if (strcmp(principal_mappings
.val
[i
].subject
, *subject_name
) != 0)
1890 kdc_log(context
, config
, 5,
1891 "Found matching PK-INIT FILE ACL");
1895 ret
= KRB5_KDC_ERR_CLIENT_NAME_MISMATCH
;
1896 krb5_set_error_message(context
, ret
,
1897 "PKINIT no matching principals for %s",
1900 kdc_log(context
, config
, 5,
1901 "PKINIT no matching principals for %s",
1904 free(*subject_name
);
1905 *subject_name
= NULL
;
1910 static krb5_error_code
1911 add_principal_mapping(krb5_context context
,
1912 const char *principal_name
,
1913 const char * subject
)
1915 struct pk_allowed_princ
*tmp
;
1916 krb5_principal principal
;
1917 krb5_error_code ret
;
1919 tmp
= realloc(principal_mappings
.val
,
1920 (principal_mappings
.len
+ 1) * sizeof(*tmp
));
1923 principal_mappings
.val
= tmp
;
1925 ret
= krb5_parse_name(context
, principal_name
, &principal
);
1929 principal_mappings
.val
[principal_mappings
.len
].principal
= principal
;
1931 principal_mappings
.val
[principal_mappings
.len
].subject
= strdup(subject
);
1932 if (principal_mappings
.val
[principal_mappings
.len
].subject
== NULL
) {
1933 krb5_free_principal(context
, principal
);
1936 principal_mappings
.len
++;
1942 _kdc_add_inital_verified_cas(krb5_context context
,
1943 krb5_kdc_configuration
*config
,
1944 pk_client_params
*cp
,
1947 AD_INITIAL_VERIFIED_CAS cas
;
1948 krb5_error_code ret
;
1952 memset(&cas
, 0, sizeof(cas
));
1954 /* XXX add CAs to cas here */
1956 ASN1_MALLOC_ENCODE(AD_INITIAL_VERIFIED_CAS
, data
.data
, data
.length
,
1960 if (data
.length
!= size
)
1961 krb5_abortx(context
, "internal asn.1 encoder error");
1963 ret
= _kdc_tkt_add_if_relevant_ad(context
, tkt
,
1964 KRB5_AUTHDATA_INITIAL_VERIFIED_CAS
,
1966 krb5_data_free(&data
);
1975 load_mappings(krb5_context context
, const char *fn
)
1977 krb5_error_code ret
;
1979 unsigned long lineno
= 0;
1986 while (fgets(buf
, sizeof(buf
), f
) != NULL
) {
1987 char *subject_name
, *p
;
1989 buf
[strcspn(buf
, "\n")] = '\0';
1992 p
= buf
+ strspn(buf
, " \t");
1994 if (*p
== '#' || *p
== '\0')
1997 subject_name
= strchr(p
, ':');
1998 if (subject_name
== NULL
) {
1999 krb5_warnx(context
, "pkinit mapping file line %lu "
2000 "missing \":\" :%s",
2004 *subject_name
++ = '\0';
2006 ret
= add_principal_mapping(context
, p
, subject_name
);
2008 krb5_warn(context
, ret
, "failed to add line %lu \":\" :%s\n",
2022 krb5_kdc_pk_initialize(krb5_context context
,
2023 krb5_kdc_configuration
*config
,
2024 const char *user_id
,
2025 const char *anchors
,
2031 krb5_error_code ret
;
2033 file
= krb5_config_get_string(context
, NULL
,
2034 "libdefaults", "moduli", NULL
);
2036 ret
= _krb5_parse_moduli(context
, file
, &moduli
);
2038 krb5_err(context
, 1, ret
, "PKINIT: failed to load modidi file");
2040 principal_mappings
.len
= 0;
2041 principal_mappings
.val
= NULL
;
2043 ret
= _krb5_pk_load_id(context
,
2053 krb5_warn(context
, ret
, "PKINIT: ");
2054 config
->enable_pkinit
= 0;
2062 ret
= hx509_query_alloc(context
->hx509ctx
, &q
);
2064 krb5_warnx(context
, "PKINIT: out of memory");
2068 hx509_query_match_option(q
, HX509_QUERY_OPTION_PRIVATE_KEY
);
2069 if (config
->pkinit_kdc_friendly_name
)
2070 hx509_query_match_friendly_name(q
, config
->pkinit_kdc_friendly_name
);
2072 ret
= hx509_certs_find(context
->hx509ctx
,
2073 kdc_identity
->certs
,
2076 hx509_query_free(context
->hx509ctx
, q
);
2078 if (hx509_cert_check_eku(context
->hx509ctx
, cert
,
2079 &asn1_oid_id_pkkdcekuoid
, 0)) {
2082 ret
= hx509_cert_get_subject(cert
, &name
);
2084 hx509_name_to_string(name
, &str
);
2085 krb5_warnx(context
, "WARNING Found KDC certificate (%s)"
2086 "is missing the PK-INIT KDC EKU, this is bad for "
2087 "interoperability.", str
);
2088 hx509_name_free(&name
);
2092 hx509_cert_free(cert
);
2094 krb5_warnx(context
, "PKINIT: failed to find a signing "
2095 "certifiate with a public key");
2098 if (krb5_config_get_bool_default(context
,
2102 "pkinit_allow_proxy_certificate",
2104 config
->pkinit_allow_proxy_certs
= 1;
2106 file
= krb5_config_get_string(context
,
2109 "pkinit_mappings_file",
2114 aret
= asprintf(&fn
, "%s/pki-mapping", hdb_db_dir(context
));
2116 krb5_warnx(context
, "PKINIT: out of memory");
2123 load_mappings(context
, file
);