2 * Copyright (c) 2003 - 2006 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
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30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 RCSID("$Id: pkinit.c 22243 2007-12-08 23:39:30Z lha $");
40 #include <heim_asn1.h>
41 #include <rfc2459_asn1.h>
43 #include <pkinit_asn1.h>
46 #include "crypto-headers.h"
48 /* XXX copied from lib/krb5/pkinit.c */
49 struct krb5_pk_identity {
50 hx509_context hx509ctx;
51 hx509_verify_ctx verify_ctx;
55 hx509_revoke_ctx revoke;
59 PKINIT_COMPAT_WIN2K = 1,
63 struct pk_client_params {
64 enum pkinit_type type;
65 BIGNUM *dh_public_key;
69 EncryptionKey reply_key;
72 hx509_certs client_anchors;
75 struct pk_principal_mapping {
77 struct pk_allowed_princ {
78 krb5_principal principal;
83 static struct krb5_pk_identity *kdc_identity;
84 static struct pk_principal_mapping principal_mappings;
85 static struct krb5_dh_moduli **moduli;
97 static krb5_error_code
98 pk_check_pkauthenticator_win2k(krb5_context context,
99 PKAuthenticator_Win2k *a,
104 krb5_timeofday (context, &now);
107 if (a->ctime == 0 || abs(a->ctime - now) > context->max_skew) {
108 krb5_clear_error_string(context);
109 return KRB5KRB_AP_ERR_SKEW;
114 static krb5_error_code
115 pk_check_pkauthenticator(krb5_context context,
126 krb5_timeofday (context, &now);
129 if (a->ctime == 0 || abs(a->ctime - now) > context->max_skew) {
130 krb5_clear_error_string(context);
131 return KRB5KRB_AP_ERR_SKEW;
134 ASN1_MALLOC_ENCODE(KDC_REQ_BODY, buf, buf_size, &req->req_body, &len, ret);
136 krb5_clear_error_string(context);
140 krb5_abortx(context, "Internal error in ASN.1 encoder");
142 ret = krb5_create_checksum(context,
151 krb5_clear_error_string(context);
155 if (a->paChecksum == NULL) {
156 krb5_clear_error_string(context);
157 ret = KRB5_KDC_ERR_PA_CHECKSUM_MUST_BE_INCLUDED;
161 if (der_heim_octet_string_cmp(a->paChecksum, &checksum.checksum) != 0) {
162 krb5_clear_error_string(context);
163 ret = KRB5KRB_ERR_GENERIC;
167 free_Checksum(&checksum);
173 _kdc_pk_free_client_param(krb5_context context,
174 pk_client_params *client_params)
176 if (client_params->cert)
177 hx509_cert_free(client_params->cert);
178 if (client_params->dh)
179 DH_free(client_params->dh);
180 if (client_params->dh_public_key)
181 BN_free(client_params->dh_public_key);
182 krb5_free_keyblock_contents(context, &client_params->reply_key);
183 if (client_params->dh_group_name)
184 free(client_params->dh_group_name);
185 if (client_params->peer)
186 hx509_peer_info_free(client_params->peer);
187 if (client_params->client_anchors)
188 hx509_certs_free(&client_params->client_anchors);
189 memset(client_params, 0, sizeof(*client_params));
193 static krb5_error_code
194 generate_dh_keyblock(krb5_context context, pk_client_params *client_params,
195 krb5_enctype enctype, krb5_keyblock *reply_key)
197 unsigned char *dh_gen_key = NULL;
200 size_t dh_gen_keylen, size;
202 memset(&key, 0, sizeof(key));
204 if (!DH_generate_key(client_params->dh)) {
205 krb5_set_error_string(context, "Can't generate Diffie-Hellman keys");
206 ret = KRB5KRB_ERR_GENERIC;
209 if (client_params->dh_public_key == NULL) {
210 krb5_set_error_string(context, "dh_public_key");
211 ret = KRB5KRB_ERR_GENERIC;
215 dh_gen_keylen = DH_size(client_params->dh);
216 size = BN_num_bytes(client_params->dh->p);
217 if (size < dh_gen_keylen)
218 size = dh_gen_keylen;
220 dh_gen_key = malloc(size);
221 if (dh_gen_key == NULL) {
222 krb5_set_error_string(context, "malloc: out of memory");
226 memset(dh_gen_key, 0, size - dh_gen_keylen);
228 dh_gen_keylen = DH_compute_key(dh_gen_key + (size - dh_gen_keylen),
229 client_params->dh_public_key,
231 if (dh_gen_keylen == -1) {
232 krb5_set_error_string(context, "Can't compute Diffie-Hellman key");
233 ret = KRB5KRB_ERR_GENERIC;
237 ret = _krb5_pk_octetstring2key(context,
239 dh_gen_key, dh_gen_keylen,
246 if (key.keyvalue.data)
247 krb5_free_keyblock_contents(context, &key);
253 integer_to_BN(krb5_context context, const char *field, heim_integer *f)
257 bn = BN_bin2bn((const unsigned char *)f->data, f->length, NULL);
259 krb5_set_error_string(context, "PKINIT: parsing BN failed %s", field);
262 BN_set_negative(bn, f->negative);
266 static krb5_error_code
267 get_dh_param(krb5_context context,
268 krb5_kdc_configuration *config,
269 SubjectPublicKeyInfo *dh_key_info,
270 pk_client_params *client_params)
272 DomainParameters dhparam;
276 memset(&dhparam, 0, sizeof(dhparam));
278 if (der_heim_oid_cmp(&dh_key_info->algorithm.algorithm, oid_id_dhpublicnumber())) {
279 krb5_set_error_string(context,
280 "PKINIT invalid oid in clientPublicValue");
281 return KRB5_BADMSGTYPE;
284 if (dh_key_info->algorithm.parameters == NULL) {
285 krb5_set_error_string(context, "PKINIT missing algorithm parameter "
286 "in clientPublicValue");
287 return KRB5_BADMSGTYPE;
290 ret = decode_DomainParameters(dh_key_info->algorithm.parameters->data,
291 dh_key_info->algorithm.parameters->length,
295 krb5_set_error_string(context, "Can't decode algorithm "
296 "parameters in clientPublicValue");
300 if ((dh_key_info->subjectPublicKey.length % 8) != 0) {
301 ret = KRB5_BADMSGTYPE;
302 krb5_set_error_string(context, "PKINIT: subjectPublicKey not aligned "
303 "to 8 bit boundary");
308 ret = _krb5_dh_group_ok(context, config->pkinit_dh_min_bits,
309 &dhparam.p, &dhparam.g, &dhparam.q, moduli,
310 &client_params->dh_group_name);
312 /* XXX send back proposal of better group */
318 krb5_set_error_string(context, "Cannot create DH structure");
322 ret = KRB5_BADMSGTYPE;
323 dh->p = integer_to_BN(context, "DH prime", &dhparam.p);
326 dh->g = integer_to_BN(context, "DH base", &dhparam.g);
329 dh->q = integer_to_BN(context, "DH p-1 factor", &dhparam.q);
337 ret = decode_DHPublicKey(dh_key_info->subjectPublicKey.data,
338 dh_key_info->subjectPublicKey.length / 8,
342 krb5_clear_error_string(context);
346 client_params->dh_public_key = integer_to_BN(context,
349 der_free_heim_integer(&glue);
350 if (client_params->dh_public_key == NULL)
354 client_params->dh = dh;
361 free_DomainParameters(&dhparam);
366 _kdc_pk_rd_padata(krb5_context context,
367 krb5_kdc_configuration *config,
370 pk_client_params **ret_params)
372 pk_client_params *client_params;
374 heim_oid eContentType = { 0, NULL }, contentInfoOid = { 0, NULL };
375 krb5_data eContent = { 0, NULL };
376 krb5_data signed_content = { 0, NULL };
377 const char *type = "unknown type";
382 if (!config->enable_pkinit) {
383 kdc_log(context, config, 0, "PK-INIT request but PK-INIT not enabled");
384 krb5_clear_error_string(context);
388 hx509_verify_set_time(kdc_identity->verify_ctx, _kdc_now.tv_sec);
390 client_params = calloc(1, sizeof(*client_params));
391 if (client_params == NULL) {
392 krb5_clear_error_string(context);
397 if (pa->padata_type == KRB5_PADATA_PK_AS_REQ_WIN) {
398 PA_PK_AS_REQ_Win2k r;
400 type = "PK-INIT-Win2k";
402 ret = decode_PA_PK_AS_REQ_Win2k(pa->padata_value.data,
403 pa->padata_value.length,
407 krb5_set_error_string(context, "Can't decode "
408 "PK-AS-REQ-Win2k: %d", ret);
412 ret = hx509_cms_unwrap_ContentInfo(&r.signed_auth_pack,
416 free_PA_PK_AS_REQ_Win2k(&r);
418 krb5_set_error_string(context, "Can't decode PK-AS-REQ: %d", ret);
422 } else if (pa->padata_type == KRB5_PADATA_PK_AS_REQ) {
425 type = "PK-INIT-IETF";
427 ret = decode_PA_PK_AS_REQ(pa->padata_value.data,
428 pa->padata_value.length,
432 krb5_set_error_string(context, "Can't decode PK-AS-REQ: %d", ret);
436 /* XXX look at r.kdcPkId */
437 if (r.trustedCertifiers) {
438 ExternalPrincipalIdentifiers *edi = r.trustedCertifiers;
441 ret = hx509_certs_init(kdc_identity->hx509ctx,
442 "MEMORY:client-anchors",
444 &client_params->client_anchors);
446 krb5_set_error_string(context, "Can't allocate client anchors: %d", ret);
450 for (i = 0; i < edi->len; i++) {
451 IssuerAndSerialNumber iasn;
456 if (edi->val[i].issuerAndSerialNumber == NULL)
459 ret = hx509_query_alloc(kdc_identity->hx509ctx, &q);
461 krb5_set_error_string(context,
462 "Failed to allocate hx509_query");
466 ret = decode_IssuerAndSerialNumber(edi->val[i].issuerAndSerialNumber->data,
467 edi->val[i].issuerAndSerialNumber->length,
471 hx509_query_free(kdc_identity->hx509ctx, q);
474 ret = hx509_query_match_issuer_serial(q, &iasn.issuer, &iasn.serialNumber);
475 free_IssuerAndSerialNumber(&iasn);
479 ret = hx509_certs_find(kdc_identity->hx509ctx,
483 hx509_query_free(kdc_identity->hx509ctx, q);
486 hx509_certs_add(kdc_identity->hx509ctx,
487 client_params->client_anchors, cert);
488 hx509_cert_free(cert);
492 ret = hx509_cms_unwrap_ContentInfo(&r.signedAuthPack,
496 free_PA_PK_AS_REQ(&r);
498 krb5_set_error_string(context, "Can't unwrap ContentInfo: %d", ret);
503 krb5_clear_error_string(context);
504 ret = KRB5KDC_ERR_PADATA_TYPE_NOSUPP;
508 ret = der_heim_oid_cmp(&contentInfoOid, oid_id_pkcs7_signedData());
510 krb5_set_error_string(context, "PK-AS-REQ-Win2k invalid content "
512 ret = KRB5KRB_ERR_GENERIC;
517 krb5_set_error_string(context,
518 "PK-AS-REQ-Win2k no signed auth pack");
519 ret = KRB5KRB_ERR_GENERIC;
524 hx509_certs signer_certs;
526 ret = hx509_cms_verify_signed(kdc_identity->hx509ctx,
527 kdc_identity->verify_ctx,
529 signed_content.length,
531 kdc_identity->certpool,
536 char *s = hx509_get_error_string(kdc_identity->hx509ctx, ret);
537 krb5_warnx(context, "PKINIT: failed to verify signature: %s: %d",
543 ret = hx509_get_one_cert(kdc_identity->hx509ctx, signer_certs,
544 &client_params->cert);
545 hx509_certs_free(&signer_certs);
550 /* Signature is correct, now verify the signed message */
551 if (der_heim_oid_cmp(&eContentType, oid_id_pkcs7_data()) != 0 &&
552 der_heim_oid_cmp(&eContentType, oid_id_pkauthdata()) != 0)
554 krb5_set_error_string(context, "got wrong oid for pkauthdata");
555 ret = KRB5_BADMSGTYPE;
559 if (pa->padata_type == KRB5_PADATA_PK_AS_REQ_WIN) {
562 ret = decode_AuthPack_Win2k(eContent.data,
567 krb5_set_error_string(context, "can't decode AuthPack: %d", ret);
571 ret = pk_check_pkauthenticator_win2k(context,
575 free_AuthPack_Win2k(&ap);
579 client_params->type = PKINIT_COMPAT_WIN2K;
580 client_params->nonce = ap.pkAuthenticator.nonce;
582 if (ap.clientPublicValue) {
583 krb5_set_error_string(context, "DH not supported for windows");
584 ret = KRB5KRB_ERR_GENERIC;
587 free_AuthPack_Win2k(&ap);
589 } else if (pa->padata_type == KRB5_PADATA_PK_AS_REQ) {
592 ret = decode_AuthPack(eContent.data,
597 krb5_set_error_string(context, "can't decode AuthPack: %d", ret);
602 ret = pk_check_pkauthenticator(context,
610 client_params->type = PKINIT_COMPAT_27;
611 client_params->nonce = ap.pkAuthenticator.nonce;
613 if (ap.clientPublicValue) {
614 ret = get_dh_param(context, config,
615 ap.clientPublicValue, client_params);
622 if (ap.supportedCMSTypes) {
623 ret = hx509_peer_info_alloc(kdc_identity->hx509ctx,
624 &client_params->peer);
629 ret = hx509_peer_info_set_cms_algs(kdc_identity->hx509ctx,
631 ap.supportedCMSTypes->val,
632 ap.supportedCMSTypes->len);
640 krb5_abortx(context, "internal pkinit error");
642 kdc_log(context, config, 0, "PK-INIT request of type %s", type);
646 krb5_warn(context, ret, "PKINIT");
648 if (signed_content.data)
649 free(signed_content.data);
650 krb5_data_free(&eContent);
651 der_free_oid(&eContentType);
652 der_free_oid(&contentInfoOid);
654 _kdc_pk_free_client_param(context, client_params);
656 *ret_params = client_params;
664 static krb5_error_code
665 BN_to_integer(krb5_context context, BIGNUM *bn, heim_integer *integer)
667 integer->length = BN_num_bytes(bn);
668 integer->data = malloc(integer->length);
669 if (integer->data == NULL) {
670 krb5_clear_error_string(context);
673 BN_bn2bin(bn, integer->data);
674 integer->negative = BN_is_negative(bn);
678 static krb5_error_code
679 pk_mk_pa_reply_enckey(krb5_context context,
680 krb5_kdc_configuration *config,
681 pk_client_params *client_params,
683 const krb5_data *req_buffer,
684 krb5_keyblock *reply_key,
685 ContentInfo *content_info)
687 const heim_oid *envelopedAlg = NULL, *sdAlg = NULL;
689 krb5_data buf, signed_data;
693 krb5_data_zero(&buf);
694 krb5_data_zero(&signed_data);
697 * If the message client is a win2k-type but it send pa data
698 * 09-binding it expects a IETF (checksum) reply so there can be
702 switch (client_params->type) {
703 case PKINIT_COMPAT_WIN2K: {
705 if (_kdc_find_padata(req, &i, KRB5_PADATA_PK_AS_09_BINDING) == NULL
706 && config->pkinit_require_binding == 0)
712 case PKINIT_COMPAT_27:
715 krb5_abortx(context, "internal pkinit error");
719 ReplyKeyPack_Win2k kp;
720 memset(&kp, 0, sizeof(kp));
722 envelopedAlg = oid_id_rsadsi_des_ede3_cbc();
723 sdAlg = oid_id_pkcs7_data();
725 ret = copy_EncryptionKey(reply_key, &kp.replyKey);
727 krb5_clear_error_string(context);
730 kp.nonce = client_params->nonce;
732 ASN1_MALLOC_ENCODE(ReplyKeyPack_Win2k,
733 buf.data, buf.length,
735 free_ReplyKeyPack_Win2k(&kp);
737 krb5_crypto ascrypto;
739 memset(&kp, 0, sizeof(kp));
741 sdAlg = oid_id_pkrkeydata();
743 ret = copy_EncryptionKey(reply_key, &kp.replyKey);
745 krb5_clear_error_string(context);
749 ret = krb5_crypto_init(context, reply_key, 0, &ascrypto);
751 krb5_clear_error_string(context);
755 ret = krb5_create_checksum(context, ascrypto, 6, 0,
756 req_buffer->data, req_buffer->length,
759 krb5_clear_error_string(context);
763 ret = krb5_crypto_destroy(context, ascrypto);
765 krb5_clear_error_string(context);
768 ASN1_MALLOC_ENCODE(ReplyKeyPack, buf.data, buf.length, &kp, &size,ret);
769 free_ReplyKeyPack(&kp);
772 krb5_set_error_string(context, "ASN.1 encoding of ReplyKeyPack "
776 if (buf.length != size)
777 krb5_abortx(context, "Internal ASN.1 encoder error");
783 ret = hx509_query_alloc(kdc_identity->hx509ctx, &q);
787 hx509_query_match_option(q, HX509_QUERY_OPTION_PRIVATE_KEY);
788 hx509_query_match_option(q, HX509_QUERY_OPTION_KU_DIGITALSIGNATURE);
790 ret = hx509_certs_find(kdc_identity->hx509ctx,
794 hx509_query_free(kdc_identity->hx509ctx, q);
798 ret = hx509_cms_create_signed_1(kdc_identity->hx509ctx,
806 client_params->client_anchors,
807 kdc_identity->certpool,
809 hx509_cert_free(cert);
812 krb5_data_free(&buf);
816 if (client_params->type == PKINIT_COMPAT_WIN2K) {
817 ret = hx509_cms_wrap_ContentInfo(oid_id_pkcs7_signedData(),
822 krb5_data_free(&signed_data);
826 ret = hx509_cms_envelope_1(kdc_identity->hx509ctx,
829 signed_data.data, signed_data.length,
831 oid_id_pkcs7_signedData(), &buf);
835 ret = _krb5_pk_mk_ContentInfo(context,
837 oid_id_pkcs7_envelopedData(),
840 krb5_data_free(&buf);
841 krb5_data_free(&signed_data);
849 static krb5_error_code
850 pk_mk_pa_reply_dh(krb5_context context,
852 pk_client_params *client_params,
853 krb5_keyblock *reply_key,
854 ContentInfo *content_info,
855 hx509_cert *kdc_cert)
857 KDCDHKeyInfo dh_info;
858 krb5_data signed_data, buf;
859 ContentInfo contentinfo;
864 memset(&contentinfo, 0, sizeof(contentinfo));
865 memset(&dh_info, 0, sizeof(dh_info));
866 krb5_data_zero(&buf);
867 krb5_data_zero(&signed_data);
871 ret = BN_to_integer(context, kdc_dh->pub_key, &i);
875 ASN1_MALLOC_ENCODE(DHPublicKey, buf.data, buf.length, &i, &size, ret);
877 krb5_set_error_string(context, "ASN.1 encoding of "
878 "DHPublicKey failed (%d)", ret);
879 krb5_clear_error_string(context);
882 if (buf.length != size)
883 krb5_abortx(context, "Internal ASN.1 encoder error");
885 dh_info.subjectPublicKey.length = buf.length * 8;
886 dh_info.subjectPublicKey.data = buf.data;
888 dh_info.nonce = client_params->nonce;
890 ASN1_MALLOC_ENCODE(KDCDHKeyInfo, buf.data, buf.length, &dh_info, &size,
893 krb5_set_error_string(context, "ASN.1 encoding of "
894 "KdcDHKeyInfo failed (%d)", ret);
897 if (buf.length != size)
898 krb5_abortx(context, "Internal ASN.1 encoder error");
901 * Create the SignedData structure and sign the KdcDHKeyInfo
909 ret = hx509_query_alloc(kdc_identity->hx509ctx, &q);
913 hx509_query_match_option(q, HX509_QUERY_OPTION_PRIVATE_KEY);
914 hx509_query_match_option(q, HX509_QUERY_OPTION_KU_DIGITALSIGNATURE);
916 ret = hx509_certs_find(kdc_identity->hx509ctx,
920 hx509_query_free(kdc_identity->hx509ctx, q);
924 ret = hx509_cms_create_signed_1(kdc_identity->hx509ctx,
926 oid_id_pkdhkeydata(),
932 client_params->client_anchors,
933 kdc_identity->certpool,
940 ret = _krb5_pk_mk_ContentInfo(context,
942 oid_id_pkcs7_signedData(),
948 if (ret && *kdc_cert) {
949 hx509_cert_free(*kdc_cert);
953 krb5_data_free(&buf);
954 krb5_data_free(&signed_data);
955 free_KDCDHKeyInfo(&dh_info);
965 _kdc_pk_mk_pa_reply(krb5_context context,
966 krb5_kdc_configuration *config,
967 pk_client_params *client_params,
968 const hdb_entry_ex *client,
970 const krb5_data *req_buffer,
971 krb5_keyblock **reply_key,
977 krb5_enctype enctype;
979 hx509_cert kdc_cert = NULL;
982 if (!config->enable_pkinit) {
983 krb5_clear_error_string(context);
987 if (req->req_body.etype.len > 0) {
988 for (i = 0; i < req->req_body.etype.len; i++)
989 if (krb5_enctype_valid(context, req->req_body.etype.val[i]) == 0)
991 if (req->req_body.etype.len <= i) {
992 ret = KRB5KRB_ERR_GENERIC;
993 krb5_set_error_string(context,
994 "No valid enctype available from client");
997 enctype = req->req_body.etype.val[i];
999 enctype = ETYPE_DES3_CBC_SHA1;
1001 if (client_params->type == PKINIT_COMPAT_27) {
1003 const char *type, *other = "";
1005 memset(&rep, 0, sizeof(rep));
1007 pa_type = KRB5_PADATA_PK_AS_REP;
1009 if (client_params->dh == NULL) {
1014 rep.element = choice_PA_PK_AS_REP_encKeyPack;
1016 ret = krb5_generate_random_keyblock(context, enctype,
1017 &client_params->reply_key);
1019 free_PA_PK_AS_REP(&rep);
1022 ret = pk_mk_pa_reply_enckey(context,
1027 &client_params->reply_key,
1030 free_PA_PK_AS_REP(&rep);
1033 ASN1_MALLOC_ENCODE(ContentInfo, rep.u.encKeyPack.data,
1034 rep.u.encKeyPack.length, &info, &size,
1036 free_ContentInfo(&info);
1038 krb5_set_error_string(context, "encoding of Key ContentInfo "
1040 free_PA_PK_AS_REP(&rep);
1043 if (rep.u.encKeyPack.length != size)
1044 krb5_abortx(context, "Internal ASN.1 encoder error");
1050 if (client_params->dh_group_name)
1051 other = client_params->dh_group_name;
1053 rep.element = choice_PA_PK_AS_REP_dhInfo;
1055 ret = generate_dh_keyblock(context, client_params, enctype,
1056 &client_params->reply_key);
1060 ret = pk_mk_pa_reply_dh(context, client_params->dh,
1062 &client_params->reply_key,
1066 ASN1_MALLOC_ENCODE(ContentInfo, rep.u.dhInfo.dhSignedData.data,
1067 rep.u.dhInfo.dhSignedData.length, &info, &size,
1069 free_ContentInfo(&info);
1071 krb5_set_error_string(context, "encoding of Key ContentInfo "
1073 free_PA_PK_AS_REP(&rep);
1076 if (rep.u.encKeyPack.length != size)
1077 krb5_abortx(context, "Internal ASN.1 encoder error");
1081 free_PA_PK_AS_REP(&rep);
1085 ASN1_MALLOC_ENCODE(PA_PK_AS_REP, buf, len, &rep, &size, ret);
1086 free_PA_PK_AS_REP(&rep);
1088 krb5_set_error_string(context, "encode PA-PK-AS-REP failed %d",
1093 krb5_abortx(context, "Internal ASN.1 encoder error");
1095 kdc_log(context, config, 0, "PK-INIT using %s %s", type, other);
1097 } else if (client_params->type == PKINIT_COMPAT_WIN2K) {
1098 PA_PK_AS_REP_Win2k rep;
1101 if (client_params->dh) {
1102 krb5_set_error_string(context, "Windows PK-INIT doesn't support DH");
1103 ret = KRB5KRB_ERR_GENERIC;
1107 memset(&rep, 0, sizeof(rep));
1109 pa_type = KRB5_PADATA_PK_AS_REP_19;
1110 rep.element = choice_PA_PK_AS_REP_encKeyPack;
1112 ret = krb5_generate_random_keyblock(context, enctype,
1113 &client_params->reply_key);
1115 free_PA_PK_AS_REP_Win2k(&rep);
1118 ret = pk_mk_pa_reply_enckey(context,
1123 &client_params->reply_key,
1126 free_PA_PK_AS_REP_Win2k(&rep);
1129 ASN1_MALLOC_ENCODE(ContentInfo, rep.u.encKeyPack.data,
1130 rep.u.encKeyPack.length, &info, &size,
1132 free_ContentInfo(&info);
1134 krb5_set_error_string(context, "encoding of Key ContentInfo "
1136 free_PA_PK_AS_REP_Win2k(&rep);
1139 if (rep.u.encKeyPack.length != size)
1140 krb5_abortx(context, "Internal ASN.1 encoder error");
1142 ASN1_MALLOC_ENCODE(PA_PK_AS_REP_Win2k, buf, len, &rep, &size, ret);
1143 free_PA_PK_AS_REP_Win2k(&rep);
1145 krb5_set_error_string(context,
1146 "encode PA-PK-AS-REP-Win2k failed %d", ret);
1150 krb5_abortx(context, "Internal ASN.1 encoder error");
1153 krb5_abortx(context, "PK-INIT internal error");
1156 ret = krb5_padata_add(context, md, pa_type, buf, len);
1158 krb5_set_error_string(context, "failed adding PA-PK-AS-REP %d", ret);
1163 if (config->pkinit_kdc_ocsp_file) {
1165 if (ocsp.expire == 0 && ocsp.next_update > kdc_time) {
1169 krb5_data_free(&ocsp.data);
1172 ocsp.next_update = kdc_time + 60 * 5;
1174 fd = open(config->pkinit_kdc_ocsp_file, O_RDONLY);
1176 kdc_log(context, config, 0,
1177 "PK-INIT failed to open ocsp data file %d", errno);
1180 ret = fstat(fd, &sb);
1184 kdc_log(context, config, 0,
1185 "PK-INIT failed to stat ocsp data %d", ret);
1189 ret = krb5_data_alloc(&ocsp.data, sb.st_size);
1192 kdc_log(context, config, 0,
1193 "PK-INIT failed to stat ocsp data %d", ret);
1196 ocsp.data.length = sb.st_size;
1197 ret = read(fd, ocsp.data.data, sb.st_size);
1199 if (ret != sb.st_size) {
1200 kdc_log(context, config, 0,
1201 "PK-INIT failed to read ocsp data %d", errno);
1205 ret = hx509_ocsp_verify(kdc_identity->hx509ctx,
1209 ocsp.data.data, ocsp.data.length,
1212 kdc_log(context, config, 0,
1213 "PK-INIT failed to verify ocsp data %d", ret);
1214 krb5_data_free(&ocsp.data);
1216 } else if (ocsp.expire > 180) {
1217 ocsp.expire -= 180; /* refetch the ocsp before it expire */
1218 ocsp.next_update = ocsp.expire;
1220 ocsp.next_update = kdc_time;
1226 if (ocsp.expire != 0 && ocsp.expire > kdc_time) {
1228 ret = krb5_padata_add(context, md,
1229 KRB5_PADATA_PA_PK_OCSP_RESPONSE,
1230 ocsp.data.data, ocsp.data.length);
1232 krb5_set_error_string(context,
1233 "Failed adding OCSP response %d", ret);
1241 hx509_cert_free(kdc_cert);
1244 *reply_key = &client_params->reply_key;
1249 match_rfc_san(krb5_context context,
1250 krb5_kdc_configuration *config,
1251 hx509_context hx509ctx,
1252 hx509_cert client_cert,
1253 krb5_const_principal match)
1255 hx509_octet_string_list list;
1256 int ret, i, found = 0;
1258 memset(&list, 0 , sizeof(list));
1260 ret = hx509_cert_find_subjectAltName_otherName(hx509ctx,
1262 oid_id_pkinit_san(),
1267 for (i = 0; !found && i < list.len; i++) {
1268 krb5_principal_data principal;
1269 KRB5PrincipalName kn;
1272 ret = decode_KRB5PrincipalName(list.val[i].data,
1276 kdc_log(context, config, 0,
1277 "Decoding kerberos name in certificate failed: %s",
1278 krb5_get_err_text(context, ret));
1281 if (size != list.val[i].length) {
1282 kdc_log(context, config, 0,
1283 "Decoding kerberos name have extra bits on the end");
1284 return KRB5_KDC_ERR_CLIENT_NAME_MISMATCH;
1287 principal.name = kn.principalName;
1288 principal.realm = kn.realm;
1290 if (krb5_principal_compare(context, &principal, match) == TRUE)
1292 free_KRB5PrincipalName(&kn);
1296 hx509_free_octet_string_list(&list);
1301 return KRB5_KDC_ERR_CLIENT_NAME_MISMATCH;
1307 match_ms_upn_san(krb5_context context,
1308 krb5_kdc_configuration *config,
1309 hx509_context hx509ctx,
1310 hx509_cert client_cert,
1311 krb5_const_principal match)
1313 hx509_octet_string_list list;
1314 krb5_principal principal = NULL;
1319 memset(&list, 0 , sizeof(list));
1321 ret = hx509_cert_find_subjectAltName_otherName(hx509ctx,
1323 oid_id_pkinit_ms_san(),
1328 if (list.len != 1) {
1329 kdc_log(context, config, 0,
1330 "More then one PK-INIT MS UPN SAN");
1334 ret = decode_MS_UPN_SAN(list.val[0].data, list.val[0].length, &upn, &size);
1336 kdc_log(context, config, 0, "Decode of MS-UPN-SAN failed");
1340 kdc_log(context, config, 0, "found MS UPN SAN: %s", upn);
1342 ret = krb5_parse_name(context, upn, &principal);
1343 free_MS_UPN_SAN(&upn);
1345 kdc_log(context, config, 0, "Failed to parse principal in MS UPN SAN");
1350 * This is very wrong, but will do for now, should really and a
1351 * plugin to the windc layer to very this ACL.
1353 strupr(principal->realm);
1355 if (krb5_principal_compare(context, principal, match) == TRUE)
1360 krb5_free_principal(context, principal);
1361 hx509_free_octet_string_list(&list);
1366 return KRB5_KDC_ERR_CLIENT_NAME_MISMATCH;
1372 _kdc_pk_check_client(krb5_context context,
1373 krb5_kdc_configuration *config,
1374 const hdb_entry_ex *client,
1375 pk_client_params *client_params,
1376 char **subject_name)
1378 const HDB_Ext_PKINIT_acl *acl;
1379 krb5_error_code ret;
1383 ret = hx509_cert_get_base_subject(kdc_identity->hx509ctx,
1384 client_params->cert,
1389 ret = hx509_name_to_string(name, subject_name);
1390 hx509_name_free(&name);
1394 kdc_log(context, config, 0,
1395 "Trying to authorize PK-INIT subject DN %s",
1398 if (config->pkinit_princ_in_cert) {
1399 ret = match_rfc_san(context, config,
1400 kdc_identity->hx509ctx,
1401 client_params->cert,
1402 client->entry.principal);
1404 kdc_log(context, config, 5,
1405 "Found matching PK-INIT SAN in certificate");
1408 ret = match_ms_upn_san(context, config,
1409 kdc_identity->hx509ctx,
1410 client_params->cert,
1411 client->entry.principal);
1413 kdc_log(context, config, 5,
1414 "Found matching MS UPN SAN in certificate");
1419 ret = hdb_entry_get_pkinit_acl(&client->entry, &acl);
1420 if (ret == 0 && acl != NULL) {
1422 * Cheat here and compare the generated name with the string
1423 * and not the reverse.
1425 for (i = 0; i < acl->len; i++) {
1426 if (strcmp(*subject_name, acl->val[0].subject) != 0)
1429 /* Don't support isser and anchor checking right now */
1430 if (acl->val[0].issuer)
1432 if (acl->val[0].anchor)
1435 kdc_log(context, config, 5,
1436 "Found matching PK-INIT database ACL");
1441 for (i = 0; i < principal_mappings.len; i++) {
1444 b = krb5_principal_compare(context,
1445 client->entry.principal,
1446 principal_mappings.val[i].principal);
1449 if (strcmp(principal_mappings.val[i].subject, *subject_name) != 0)
1451 kdc_log(context, config, 5,
1452 "Found matching PK-INIT FILE ACL");
1456 krb5_set_error_string(context,
1457 "PKINIT no matching principals for %s",
1460 kdc_log(context, config, 5,
1461 "PKINIT no matching principals for %s",
1464 free(*subject_name);
1465 *subject_name = NULL;
1467 return KRB5_KDC_ERR_CLIENT_NAME_MISMATCH;
1470 static krb5_error_code
1471 add_principal_mapping(krb5_context context,
1472 const char *principal_name,
1473 const char * subject)
1475 struct pk_allowed_princ *tmp;
1476 krb5_principal principal;
1477 krb5_error_code ret;
1479 tmp = realloc(principal_mappings.val,
1480 (principal_mappings.len + 1) * sizeof(*tmp));
1483 principal_mappings.val = tmp;
1485 ret = krb5_parse_name(context, principal_name, &principal);
1489 principal_mappings.val[principal_mappings.len].principal = principal;
1491 principal_mappings.val[principal_mappings.len].subject = strdup(subject);
1492 if (principal_mappings.val[principal_mappings.len].subject == NULL) {
1493 krb5_free_principal(context, principal);
1496 principal_mappings.len++;
1502 _kdc_add_inital_verified_cas(krb5_context context,
1503 krb5_kdc_configuration *config,
1504 pk_client_params *params,
1507 AD_INITIAL_VERIFIED_CAS cas;
1508 krb5_error_code ret;
1512 memset(&cas, 0, sizeof(cas));
1514 /* XXX add CAs to cas here */
1516 ASN1_MALLOC_ENCODE(AD_INITIAL_VERIFIED_CAS, data.data, data.length,
1520 if (data.length != size)
1521 krb5_abortx(context, "internal asn.1 encoder error");
1523 ret = _kdc_tkt_add_if_relevant_ad(context, tkt,
1524 KRB5_AUTHDATA_INITIAL_VERIFIED_CAS,
1526 krb5_data_free(&data);
1535 load_mappings(krb5_context context, const char *fn)
1537 krb5_error_code ret;
1539 unsigned long lineno = 0;
1546 while (fgets(buf, sizeof(buf), f) != NULL) {
1547 char *subject_name, *p;
1549 buf[strcspn(buf, "\n")] = '\0';
1552 p = buf + strspn(buf, " \t");
1554 if (*p == '#' || *p == '\0')
1557 subject_name = strchr(p, ':');
1558 if (subject_name == NULL) {
1559 krb5_warnx(context, "pkinit mapping file line %lu "
1560 "missing \":\" :%s",
1564 *subject_name++ = '\0';
1566 ret = add_principal_mapping(context, p, subject_name);
1568 krb5_warn(context, ret, "failed to add line %lu \":\" :%s\n",
1582 _kdc_pk_initialize(krb5_context context,
1583 krb5_kdc_configuration *config,
1584 const char *user_id,
1585 const char *anchors,
1591 krb5_error_code ret;
1593 file = krb5_config_get_string(context, NULL,
1594 "libdefaults", "moduli", NULL);
1596 ret = _krb5_parse_moduli(context, file, &moduli);
1598 krb5_err(context, 1, ret, "PKINIT: failed to load modidi file");
1600 principal_mappings.len = 0;
1601 principal_mappings.val = NULL;
1603 ret = _krb5_pk_load_id(context,
1613 krb5_warn(context, ret, "PKINIT: ");
1614 config->enable_pkinit = 0;
1622 ret = hx509_query_alloc(kdc_identity->hx509ctx, &q);
1624 krb5_warnx(context, "PKINIT: out of memory");
1628 hx509_query_match_option(q, HX509_QUERY_OPTION_PRIVATE_KEY);
1629 hx509_query_match_option(q, HX509_QUERY_OPTION_KU_DIGITALSIGNATURE);
1631 ret = hx509_certs_find(kdc_identity->hx509ctx,
1632 kdc_identity->certs,
1635 hx509_query_free(kdc_identity->hx509ctx, q);
1637 if (hx509_cert_check_eku(kdc_identity->hx509ctx, cert,
1638 oid_id_pkkdcekuoid(), 0))
1639 krb5_warnx(context, "WARNING Found KDC certificate "
1640 "is missing the PK-INIT KDC EKU, this is bad for "
1641 "interoperability.");
1642 hx509_cert_free(cert);
1644 krb5_warnx(context, "PKINIT: failed to find a signing "
1645 "certifiate with a public key");
1648 ret = krb5_config_get_bool_default(context,
1652 "pkinit_allow_proxy_certificate",
1654 _krb5_pk_allow_proxy_certificate(kdc_identity, ret);
1656 file = krb5_config_get_string(context,
1659 "pkinit_mappings_file",
1662 asprintf(&fn, "%s/pki-mapping", hdb_db_dir(context));
1666 load_mappings(context, file);