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a61b7f2f | 1 | /*- |
33388b44 | 2 | * Copyright 2007-2020 The OpenSSL Project Authors. All Rights Reserved. |
a61b7f2f | 3 | * Copyright Nokia 2007-2018 |
8869ad4a | 4 | * Copyright Siemens AG 2015-2019 |
a61b7f2f | 5 | * |
ce9b9964 | 6 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
a61b7f2f DO |
7 | * this file except in compliance with the License. You can obtain a copy |
8 | * in the file LICENSE in the source distribution or at | |
9 | * https://www.openssl.org/source/license.html | |
10 | * | |
11 | * CRMF implementation by Martin Peylo, Miikka Viljanen, and David von Oheimb. | |
12 | */ | |
13 | ||
14 | /* | |
15 | * This file contains the functions that handle the individual items inside | |
16 | * the CRMF structures | |
17 | */ | |
18 | ||
19 | /* | |
20 | * NAMING | |
21 | * | |
22 | * The 0 functions use the supplied structure pointer directly in the parent and | |
23 | * it will be freed up when the parent is freed. | |
24 | * | |
25 | * The 1 functions use a copy of the supplied structure pointer (or in some | |
26 | * cases increases its link count) in the parent and so both should be freed up. | |
27 | */ | |
28 | ||
29 | #include <openssl/asn1t.h> | |
30 | ||
706457b7 DMSP |
31 | #include "crmf_local.h" |
32 | #include "internal/constant_time.h" | |
a61b7f2f DO |
33 | |
34 | /* explicit #includes not strictly needed since implied by the above: */ | |
35 | #include <openssl/crmf.h> | |
36 | #include <openssl/err.h> | |
37 | #include <openssl/evp.h> | |
38 | ||
39 | /*- | |
40 | * atyp = Attribute Type | |
41 | * valt = Value Type | |
42 | * ctrlinf = "regCtrl" or "regInfo" | |
43 | */ | |
44 | #define IMPLEMENT_CRMF_CTRL_FUNC(atyp, valt, ctrlinf) \ | |
45 | int OSSL_CRMF_MSG_set1_##ctrlinf##_##atyp(OSSL_CRMF_MSG *msg, \ | |
46 | const valt *in) \ | |
47 | { \ | |
48 | OSSL_CRMF_ATTRIBUTETYPEANDVALUE *atav = NULL; \ | |
49 | \ | |
235595c4 | 50 | if (msg == NULL || in == NULL) \ |
a61b7f2f DO |
51 | goto err; \ |
52 | if ((atav = OSSL_CRMF_ATTRIBUTETYPEANDVALUE_new()) == NULL) \ | |
53 | goto err; \ | |
54 | if ((atav->type = OBJ_nid2obj(NID_id_##ctrlinf##_##atyp)) == NULL) \ | |
55 | goto err; \ | |
56 | if ((atav->value.atyp = valt##_dup(in)) == NULL) \ | |
57 | goto err; \ | |
58 | if (!OSSL_CRMF_MSG_push0_##ctrlinf(msg, atav)) \ | |
59 | goto err; \ | |
60 | return 1; \ | |
61 | err: \ | |
62 | OSSL_CRMF_ATTRIBUTETYPEANDVALUE_free(atav); \ | |
63 | return 0; \ | |
64 | } | |
65 | ||
66 | ||
67 | /*- | |
68 | * Pushes the given control attribute into the controls stack of a CertRequest | |
69 | * (section 6) | |
70 | * returns 1 on success, 0 on error | |
71 | */ | |
72 | static int OSSL_CRMF_MSG_push0_regCtrl(OSSL_CRMF_MSG *crm, | |
73 | OSSL_CRMF_ATTRIBUTETYPEANDVALUE *ctrl) | |
74 | { | |
75 | int new = 0; | |
76 | ||
77 | if (crm == NULL || crm->certReq == NULL || ctrl == NULL) { | |
78 | CRMFerr(CRMF_F_OSSL_CRMF_MSG_PUSH0_REGCTRL, CRMF_R_NULL_ARGUMENT); | |
79 | return 0; | |
80 | } | |
81 | ||
82 | if (crm->certReq->controls == NULL) { | |
83 | crm->certReq->controls = sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_new_null(); | |
84 | if (crm->certReq->controls == NULL) | |
7960dbec | 85 | goto err; |
a61b7f2f DO |
86 | new = 1; |
87 | } | |
88 | if (!sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_push(crm->certReq->controls, ctrl)) | |
7960dbec | 89 | goto err; |
a61b7f2f DO |
90 | |
91 | return 1; | |
7960dbec | 92 | err: |
a61b7f2f DO |
93 | if (new != 0) { |
94 | sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_free(crm->certReq->controls); | |
95 | crm->certReq->controls = NULL; | |
96 | } | |
97 | return 0; | |
98 | } | |
99 | ||
3dbc5156 | 100 | /* id-regCtrl-regToken Control (section 6.1) */ |
a61b7f2f DO |
101 | IMPLEMENT_CRMF_CTRL_FUNC(regToken, ASN1_STRING, regCtrl) |
102 | ||
3dbc5156 | 103 | /* id-regCtrl-authenticator Control (section 6.2) */ |
a61b7f2f DO |
104 | #define ASN1_UTF8STRING_dup ASN1_STRING_dup |
105 | IMPLEMENT_CRMF_CTRL_FUNC(authenticator, ASN1_UTF8STRING, regCtrl) | |
106 | ||
107 | int OSSL_CRMF_MSG_set0_SinglePubInfo(OSSL_CRMF_SINGLEPUBINFO *spi, | |
108 | int method, GENERAL_NAME *nm) | |
109 | { | |
110 | if (spi == NULL | |
111 | || method < OSSL_CRMF_PUB_METHOD_DONTCARE | |
112 | || method > OSSL_CRMF_PUB_METHOD_LDAP) { | |
113 | CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET0_SINGLEPUBINFO, | |
114 | ERR_R_PASSED_INVALID_ARGUMENT); | |
115 | return 0; | |
116 | } | |
117 | ||
118 | if (!ASN1_INTEGER_set(spi->pubMethod, method)) | |
119 | return 0; | |
120 | GENERAL_NAME_free(spi->pubLocation); | |
121 | spi->pubLocation = nm; | |
122 | return 1; | |
123 | } | |
124 | ||
235595c4 DDO |
125 | int |
126 | OSSL_CRMF_MSG_PKIPublicationInfo_push0_SinglePubInfo(OSSL_CRMF_PKIPUBLICATIONINFO *pi, | |
127 | OSSL_CRMF_SINGLEPUBINFO *spi) | |
a61b7f2f DO |
128 | { |
129 | if (pi == NULL || spi == NULL) { | |
130 | CRMFerr(CRMF_F_OSSL_CRMF_MSG_PKIPUBLICATIONINFO_PUSH0_SINGLEPUBINFO, | |
131 | CRMF_R_NULL_ARGUMENT); | |
132 | return 0; | |
133 | } | |
134 | if (pi->pubInfos == NULL) | |
135 | pi->pubInfos = sk_OSSL_CRMF_SINGLEPUBINFO_new_null(); | |
136 | if (pi->pubInfos == NULL) | |
7960dbec | 137 | return 0; |
a61b7f2f | 138 | |
7960dbec | 139 | return sk_OSSL_CRMF_SINGLEPUBINFO_push(pi->pubInfos, spi); |
a61b7f2f DO |
140 | } |
141 | ||
235595c4 DDO |
142 | int OSSL_CRMF_MSG_set_PKIPublicationInfo_action(OSSL_CRMF_PKIPUBLICATIONINFO *pi, |
143 | int action) | |
a61b7f2f DO |
144 | { |
145 | if (pi == NULL | |
146 | || action < OSSL_CRMF_PUB_ACTION_DONTPUBLISH | |
147 | || action > OSSL_CRMF_PUB_ACTION_PLEASEPUBLISH) { | |
148 | CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET_PKIPUBLICATIONINFO_ACTION, | |
149 | ERR_R_PASSED_INVALID_ARGUMENT); | |
150 | return 0; | |
151 | } | |
152 | ||
153 | return ASN1_INTEGER_set(pi->action, action); | |
154 | } | |
155 | ||
3dbc5156 | 156 | /* id-regCtrl-pkiPublicationInfo Control (section 6.3) */ |
a61b7f2f DO |
157 | IMPLEMENT_CRMF_CTRL_FUNC(pkiPublicationInfo, OSSL_CRMF_PKIPUBLICATIONINFO, |
158 | regCtrl) | |
159 | ||
3dbc5156 | 160 | /* id-regCtrl-oldCertID Control (section 6.5) from the given */ |
a61b7f2f DO |
161 | IMPLEMENT_CRMF_CTRL_FUNC(oldCertID, OSSL_CRMF_CERTID, regCtrl) |
162 | ||
163 | OSSL_CRMF_CERTID *OSSL_CRMF_CERTID_gen(const X509_NAME *issuer, | |
164 | const ASN1_INTEGER *serial) | |
165 | { | |
166 | OSSL_CRMF_CERTID *cid = NULL; | |
167 | ||
168 | if (issuer == NULL || serial == NULL) { | |
169 | CRMFerr(CRMF_F_OSSL_CRMF_CERTID_GEN, CRMF_R_NULL_ARGUMENT); | |
170 | return NULL; | |
171 | } | |
172 | ||
173 | if ((cid = OSSL_CRMF_CERTID_new()) == NULL) | |
7960dbec | 174 | goto err; |
a61b7f2f DO |
175 | |
176 | if (!X509_NAME_set(&cid->issuer->d.directoryName, issuer)) | |
7960dbec | 177 | goto err; |
a61b7f2f DO |
178 | cid->issuer->type = GEN_DIRNAME; |
179 | ||
180 | ASN1_INTEGER_free(cid->serialNumber); | |
181 | if ((cid->serialNumber = ASN1_INTEGER_dup(serial)) == NULL) | |
7960dbec | 182 | goto err; |
a61b7f2f DO |
183 | |
184 | return cid; | |
185 | ||
7960dbec | 186 | err: |
a61b7f2f DO |
187 | OSSL_CRMF_CERTID_free(cid); |
188 | return NULL; | |
189 | } | |
190 | ||
3dbc5156 DDO |
191 | /* |
192 | * id-regCtrl-protocolEncrKey Control (section 6.6) | |
193 | */ | |
a61b7f2f DO |
194 | IMPLEMENT_CRMF_CTRL_FUNC(protocolEncrKey, X509_PUBKEY, regCtrl) |
195 | ||
196 | /*- | |
197 | * Pushes the attribute given in regInfo in to the CertReqMsg->regInfo stack. | |
198 | * (section 7) | |
199 | * returns 1 on success, 0 on error | |
200 | */ | |
201 | static int OSSL_CRMF_MSG_push0_regInfo(OSSL_CRMF_MSG *crm, | |
202 | OSSL_CRMF_ATTRIBUTETYPEANDVALUE *ri) | |
203 | { | |
204 | STACK_OF(OSSL_CRMF_ATTRIBUTETYPEANDVALUE) *info = NULL; | |
205 | ||
206 | if (crm == NULL || ri == NULL) { | |
207 | CRMFerr(CRMF_F_OSSL_CRMF_MSG_PUSH0_REGINFO, CRMF_R_NULL_ARGUMENT); | |
208 | return 0; | |
209 | } | |
210 | ||
211 | if (crm->regInfo == NULL) | |
212 | crm->regInfo = info = sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_new_null(); | |
213 | if (crm->regInfo == NULL) | |
7960dbec | 214 | goto err; |
a61b7f2f | 215 | if (!sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_push(crm->regInfo, ri)) |
7960dbec | 216 | goto err; |
a61b7f2f DO |
217 | return 1; |
218 | ||
7960dbec | 219 | err: |
a61b7f2f DO |
220 | if (info != NULL) |
221 | crm->regInfo = NULL; | |
222 | sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_free(info); | |
223 | return 0; | |
224 | } | |
225 | ||
226 | /* id-regInfo-utf8Pairs to regInfo (section 7.1) */ | |
227 | IMPLEMENT_CRMF_CTRL_FUNC(utf8Pairs, ASN1_UTF8STRING, regInfo) | |
228 | ||
229 | /* id-regInfo-certReq to regInfo (section 7.2) */ | |
230 | IMPLEMENT_CRMF_CTRL_FUNC(certReq, OSSL_CRMF_CERTREQUEST, regInfo) | |
231 | ||
232 | ||
233 | /* retrieves the certificate template of crm */ | |
234 | OSSL_CRMF_CERTTEMPLATE *OSSL_CRMF_MSG_get0_tmpl(const OSSL_CRMF_MSG *crm) | |
235 | { | |
236 | if (crm == NULL || crm->certReq == NULL) { | |
237 | CRMFerr(CRMF_F_OSSL_CRMF_MSG_GET0_TMPL, CRMF_R_NULL_ARGUMENT); | |
238 | return NULL; | |
239 | } | |
240 | return crm->certReq->certTemplate; | |
241 | } | |
242 | ||
243 | ||
244 | int OSSL_CRMF_MSG_set_validity(OSSL_CRMF_MSG *crm, time_t from, time_t to) | |
245 | { | |
246 | OSSL_CRMF_OPTIONALVALIDITY *vld = NULL; | |
247 | ASN1_TIME *from_asn = NULL; | |
248 | ASN1_TIME *to_asn = NULL; | |
249 | OSSL_CRMF_CERTTEMPLATE *tmpl = OSSL_CRMF_MSG_get0_tmpl(crm); | |
250 | ||
251 | if (tmpl == NULL) { /* also crm == NULL implies this */ | |
252 | CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET_VALIDITY, CRMF_R_NULL_ARGUMENT); | |
253 | return 0; | |
254 | } | |
255 | ||
256 | if (from != 0 && ((from_asn = ASN1_TIME_set(NULL, from)) == NULL)) | |
7960dbec | 257 | goto err; |
a61b7f2f | 258 | if (to != 0 && ((to_asn = ASN1_TIME_set(NULL, to)) == NULL)) |
7960dbec | 259 | goto err; |
a61b7f2f | 260 | if ((vld = OSSL_CRMF_OPTIONALVALIDITY_new()) == NULL) |
7960dbec | 261 | goto err; |
a61b7f2f DO |
262 | |
263 | vld->notBefore = from_asn; | |
264 | vld->notAfter = to_asn; | |
265 | ||
266 | tmpl->validity = vld; | |
267 | ||
268 | return 1; | |
7960dbec | 269 | err: |
a61b7f2f DO |
270 | ASN1_TIME_free(from_asn); |
271 | ASN1_TIME_free(to_asn); | |
272 | return 0; | |
273 | } | |
274 | ||
275 | ||
276 | int OSSL_CRMF_MSG_set_certReqId(OSSL_CRMF_MSG *crm, int rid) | |
277 | { | |
278 | if (crm == NULL || crm->certReq == NULL || crm->certReq->certReqId == NULL) { | |
279 | CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET_CERTREQID, CRMF_R_NULL_ARGUMENT); | |
280 | return 0; | |
281 | } | |
282 | ||
283 | return ASN1_INTEGER_set(crm->certReq->certReqId, rid); | |
284 | } | |
285 | ||
286 | /* get ASN.1 encoded integer, return -1 on error */ | |
aac96e27 | 287 | static int crmf_asn1_get_int(const ASN1_INTEGER *a) |
a61b7f2f DO |
288 | { |
289 | int64_t res; | |
290 | ||
291 | if (!ASN1_INTEGER_get_int64(&res, a)) { | |
aac96e27 | 292 | CRMFerr(0, ASN1_R_INVALID_NUMBER); |
a61b7f2f DO |
293 | return -1; |
294 | } | |
295 | if (res < INT_MIN) { | |
aac96e27 | 296 | CRMFerr(0, ASN1_R_TOO_SMALL); |
a61b7f2f DO |
297 | return -1; |
298 | } | |
299 | if (res > INT_MAX) { | |
aac96e27 | 300 | CRMFerr(0, ASN1_R_TOO_LARGE); |
a61b7f2f DO |
301 | return -1; |
302 | } | |
303 | return (int)res; | |
304 | } | |
305 | ||
62dcd2aa | 306 | int OSSL_CRMF_MSG_get_certReqId(const OSSL_CRMF_MSG *crm) |
a61b7f2f DO |
307 | { |
308 | if (crm == NULL || /* not really needed: */ crm->certReq == NULL) { | |
309 | CRMFerr(CRMF_F_OSSL_CRMF_MSG_GET_CERTREQID, CRMF_R_NULL_ARGUMENT); | |
310 | return -1; | |
311 | } | |
aac96e27 | 312 | return crmf_asn1_get_int(crm->certReq->certReqId); |
a61b7f2f DO |
313 | } |
314 | ||
315 | ||
316 | int OSSL_CRMF_MSG_set0_extensions(OSSL_CRMF_MSG *crm, | |
317 | X509_EXTENSIONS *exts) | |
318 | { | |
319 | OSSL_CRMF_CERTTEMPLATE *tmpl = OSSL_CRMF_MSG_get0_tmpl(crm); | |
320 | ||
321 | if (tmpl == NULL) { /* also crm == NULL implies this */ | |
322 | CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET0_EXTENSIONS, CRMF_R_NULL_ARGUMENT); | |
323 | return 0; | |
324 | } | |
325 | ||
326 | if (sk_X509_EXTENSION_num(exts) == 0) { | |
327 | sk_X509_EXTENSION_free(exts); | |
328 | exts = NULL; /* do not include empty extensions list */ | |
329 | } | |
330 | ||
331 | sk_X509_EXTENSION_pop_free(tmpl->extensions, X509_EXTENSION_free); | |
332 | tmpl->extensions = exts; | |
333 | return 1; | |
334 | } | |
335 | ||
336 | ||
337 | int OSSL_CRMF_MSG_push0_extension(OSSL_CRMF_MSG *crm, | |
7960dbec | 338 | X509_EXTENSION *ext) |
a61b7f2f DO |
339 | { |
340 | int new = 0; | |
341 | OSSL_CRMF_CERTTEMPLATE *tmpl = OSSL_CRMF_MSG_get0_tmpl(crm); | |
342 | ||
343 | if (tmpl == NULL || ext == NULL) { /* also crm == NULL implies this */ | |
344 | CRMFerr(CRMF_F_OSSL_CRMF_MSG_PUSH0_EXTENSION, CRMF_R_NULL_ARGUMENT); | |
345 | return 0; | |
346 | } | |
347 | ||
348 | if (tmpl->extensions == NULL) { | |
349 | if ((tmpl->extensions = sk_X509_EXTENSION_new_null()) == NULL) | |
7960dbec | 350 | goto err; |
a61b7f2f DO |
351 | new = 1; |
352 | } | |
353 | ||
7960dbec DDO |
354 | if (!sk_X509_EXTENSION_push(tmpl->extensions, ext)) |
355 | goto err; | |
a61b7f2f | 356 | return 1; |
7960dbec | 357 | err: |
a61b7f2f DO |
358 | if (new != 0) { |
359 | sk_X509_EXTENSION_free(tmpl->extensions); | |
360 | tmpl->extensions = NULL; | |
361 | } | |
362 | return 0; | |
363 | } | |
364 | ||
365 | /* TODO: support cases 1+2 (besides case 3) defined in RFC 4211, section 4.1. */ | |
366 | static int CRMF_poposigningkey_init(OSSL_CRMF_POPOSIGNINGKEY *ps, | |
367 | OSSL_CRMF_CERTREQUEST *cr, | |
368 | EVP_PKEY *pkey, int dgst) | |
369 | { | |
a61b7f2f | 370 | int ret = 0; |
db4b3d83 RL |
371 | EVP_MD *fetched_md = NULL; |
372 | const EVP_MD *md = EVP_get_digestbynid(dgst); | |
a61b7f2f DO |
373 | |
374 | if (ps == NULL || cr == NULL || pkey == NULL) { | |
375 | CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT, CRMF_R_NULL_ARGUMENT); | |
376 | return 0; | |
377 | } | |
378 | ||
db4b3d83 RL |
379 | /* If we didn't find legacy MD, we try an implicit fetch */ |
380 | if (md == NULL) | |
381 | md = fetched_md = EVP_MD_fetch(NULL, OBJ_nid2sn(dgst), NULL); | |
a61b7f2f | 382 | |
db4b3d83 | 383 | if (md == NULL) { |
a61b7f2f DO |
384 | CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT, |
385 | CRMF_R_UNSUPPORTED_ALG_FOR_POPSIGNINGKEY); | |
db4b3d83 | 386 | return 0; |
a61b7f2f | 387 | } |
a61b7f2f | 388 | |
db4b3d83 RL |
389 | ret = ASN1_item_sign(ASN1_ITEM_rptr(OSSL_CRMF_CERTREQUEST), |
390 | ps->algorithmIdentifier, NULL, ps->signature, | |
391 | cr, pkey, md); | |
392 | ||
393 | EVP_MD_free(fetched_md); | |
a61b7f2f DO |
394 | return ret; |
395 | } | |
396 | ||
397 | ||
398 | int OSSL_CRMF_MSG_create_popo(OSSL_CRMF_MSG *crm, EVP_PKEY *pkey, | |
399 | int dgst, int ppmtd) | |
400 | { | |
401 | OSSL_CRMF_POPO *pp = NULL; | |
402 | ASN1_INTEGER *tag = NULL; | |
403 | ||
404 | if (crm == NULL || (ppmtd == OSSL_CRMF_POPO_SIGNATURE && pkey == NULL)) { | |
405 | CRMFerr(CRMF_F_OSSL_CRMF_MSG_CREATE_POPO, CRMF_R_NULL_ARGUMENT); | |
406 | return 0; | |
407 | } | |
408 | ||
409 | if (ppmtd == OSSL_CRMF_POPO_NONE) | |
410 | goto end; | |
411 | if ((pp = OSSL_CRMF_POPO_new()) == NULL) | |
7960dbec | 412 | goto err; |
a61b7f2f DO |
413 | pp->type = ppmtd; |
414 | ||
415 | switch (ppmtd) { | |
416 | case OSSL_CRMF_POPO_RAVERIFIED: | |
417 | if ((pp->value.raVerified = ASN1_NULL_new()) == NULL) | |
7960dbec | 418 | goto err; |
a61b7f2f DO |
419 | break; |
420 | ||
421 | case OSSL_CRMF_POPO_SIGNATURE: | |
422 | { | |
423 | OSSL_CRMF_POPOSIGNINGKEY *ps = OSSL_CRMF_POPOSIGNINGKEY_new(); | |
424 | if (ps == NULL | |
235595c4 | 425 | || !CRMF_poposigningkey_init(ps, crm->certReq, pkey, dgst)) { |
a61b7f2f DO |
426 | OSSL_CRMF_POPOSIGNINGKEY_free(ps); |
427 | goto err; | |
428 | } | |
429 | pp->value.signature = ps; | |
430 | } | |
431 | break; | |
432 | ||
433 | case OSSL_CRMF_POPO_KEYENC: | |
434 | if ((pp->value.keyEncipherment = OSSL_CRMF_POPOPRIVKEY_new()) == NULL) | |
7960dbec | 435 | goto err; |
a61b7f2f DO |
436 | tag = ASN1_INTEGER_new(); |
437 | pp->value.keyEncipherment->type = | |
438 | OSSL_CRMF_POPOPRIVKEY_SUBSEQUENTMESSAGE; | |
439 | pp->value.keyEncipherment->value.subsequentMessage = tag; | |
440 | if (tag == NULL | |
441 | || !ASN1_INTEGER_set(tag, OSSL_CRMF_SUBSEQUENTMESSAGE_ENCRCERT)) | |
7960dbec | 442 | goto err; |
a61b7f2f DO |
443 | break; |
444 | ||
445 | default: | |
446 | CRMFerr(CRMF_F_OSSL_CRMF_MSG_CREATE_POPO, | |
447 | CRMF_R_UNSUPPORTED_METHOD_FOR_CREATING_POPO); | |
448 | goto err; | |
449 | } | |
450 | ||
451 | end: | |
452 | OSSL_CRMF_POPO_free(crm->popo); | |
453 | crm->popo = pp; | |
454 | ||
455 | return 1; | |
a61b7f2f DO |
456 | err: |
457 | OSSL_CRMF_POPO_free(pp); | |
458 | return 0; | |
459 | } | |
460 | ||
461 | /* returns 0 for equal, -1 for a < b or error on a, 1 for a > b or error on b */ | |
462 | static int X509_PUBKEY_cmp(X509_PUBKEY *a, X509_PUBKEY *b) | |
463 | { | |
464 | X509_ALGOR *algA = NULL, *algB = NULL; | |
465 | int res = 0; | |
466 | ||
467 | if (a == b) | |
468 | return 0; | |
469 | if (a == NULL || !X509_PUBKEY_get0_param(NULL, NULL, NULL, &algA, a) | |
470 | || algA == NULL) | |
471 | return -1; | |
472 | if (b == NULL || !X509_PUBKEY_get0_param(NULL, NULL, NULL, &algB, b) | |
473 | || algB == NULL) | |
474 | return 1; | |
475 | if ((res = X509_ALGOR_cmp(algA, algB)) != 0) | |
476 | return res; | |
477 | return EVP_PKEY_cmp(X509_PUBKEY_get0(a), X509_PUBKEY_get0(b)); | |
478 | } | |
479 | ||
480 | /* verifies the Proof-of-Possession of the request with the given rid in reqs */ | |
481 | int OSSL_CRMF_MSGS_verify_popo(const OSSL_CRMF_MSGS *reqs, | |
482 | int rid, int acceptRAVerified) | |
483 | { | |
484 | OSSL_CRMF_MSG *req = NULL; | |
485 | X509_PUBKEY *pubkey = NULL; | |
486 | OSSL_CRMF_POPOSIGNINGKEY *sig = NULL; | |
487 | ||
7269071e DDO |
488 | if (reqs == NULL || (req = sk_OSSL_CRMF_MSG_value(reqs, rid)) == NULL) { |
489 | CRMFerr(CRMF_F_OSSL_CRMF_MSGS_VERIFY_POPO, CRMF_R_NULL_ARGUMENT); | |
490 | return 0; | |
491 | } | |
492 | ||
493 | if (req->popo == NULL) { | |
494 | CRMFerr(0, CRMF_R_POPO_MISSING); | |
a61b7f2f DO |
495 | return 0; |
496 | } | |
497 | ||
498 | switch (req->popo->type) { | |
499 | case OSSL_CRMF_POPO_RAVERIFIED: | |
62dcd2aa DDO |
500 | if (!acceptRAVerified) { |
501 | CRMFerr(0, CRMF_R_POPO_RAVERIFIED_NOT_ACCEPTED); | |
502 | return 0; | |
503 | } | |
a61b7f2f DO |
504 | break; |
505 | case OSSL_CRMF_POPO_SIGNATURE: | |
506 | pubkey = req->certReq->certTemplate->publicKey; | |
62dcd2aa DDO |
507 | if (pubkey == NULL) { |
508 | CRMFerr(0, CRMF_R_POPO_MISSING_PUBLIC_KEY); | |
509 | return 0; | |
510 | } | |
a61b7f2f DO |
511 | sig = req->popo->value.signature; |
512 | if (sig->poposkInput != NULL) { | |
513 | /* | |
514 | * According to RFC 4211: publicKey contains a copy of | |
515 | * the public key from the certificate template. This MUST be | |
516 | * exactly the same value as contained in the certificate template. | |
517 | */ | |
62dcd2aa DDO |
518 | if (sig->poposkInput->publicKey == NULL) { |
519 | CRMFerr(0, CRMF_R_POPO_MISSING_PUBLIC_KEY); | |
520 | return 0; | |
521 | } | |
522 | if (X509_PUBKEY_cmp(pubkey, sig->poposkInput->publicKey) != 0) { | |
523 | CRMFerr(0, CRMF_R_POPO_INCONSISTENT_PUBLIC_KEY); | |
524 | return 0; | |
525 | } | |
526 | /* | |
527 | * TODO check the contents of the authInfo sub-field, | |
528 | * see RFC 4211 https://tools.ietf.org/html/rfc4211#section-4.1 | |
529 | */ | |
530 | if (ASN1_item_verify(ASN1_ITEM_rptr(OSSL_CRMF_POPOSIGNINGKEYINPUT), | |
531 | sig->algorithmIdentifier, sig->signature, | |
532 | sig->poposkInput, | |
533 | X509_PUBKEY_get0(pubkey)) < 1) | |
534 | return 0; | |
a61b7f2f | 535 | } else { |
62dcd2aa DDO |
536 | if (req->certReq->certTemplate->subject == NULL) { |
537 | CRMFerr(0, CRMF_R_POPO_MISSING_SUBJECT); | |
538 | return 0; | |
539 | } | |
540 | if (ASN1_item_verify(ASN1_ITEM_rptr(OSSL_CRMF_CERTREQUEST), | |
541 | sig->algorithmIdentifier, sig->signature, | |
542 | req->certReq, X509_PUBKEY_get0(pubkey)) < 1) | |
543 | return 0; | |
a61b7f2f | 544 | } |
62dcd2aa | 545 | break; |
a61b7f2f DO |
546 | case OSSL_CRMF_POPO_KEYENC: |
547 | /* | |
548 | * TODO: when OSSL_CMP_certrep_new() supports encrypted certs, | |
549 | * return 1 if the type of req->popo->value.keyEncipherment | |
550 | * is OSSL_CRMF_POPOPRIVKEY_SUBSEQUENTMESSAGE and | |
551 | * its value.subsequentMessage == OSSL_CRMF_SUBSEQUENTMESSAGE_ENCRCERT | |
3dbc5156 | 552 | */ |
a61b7f2f DO |
553 | case OSSL_CRMF_POPO_KEYAGREE: |
554 | default: | |
555 | CRMFerr(CRMF_F_OSSL_CRMF_MSGS_VERIFY_POPO, | |
556 | CRMF_R_UNSUPPORTED_POPO_METHOD); | |
557 | return 0; | |
558 | } | |
62dcd2aa | 559 | return 1; |
a61b7f2f DO |
560 | } |
561 | ||
562 | /* retrieves the serialNumber of the given cert template or NULL on error */ | |
62dcd2aa DDO |
563 | ASN1_INTEGER |
564 | *OSSL_CRMF_CERTTEMPLATE_get0_serialNumber(const OSSL_CRMF_CERTTEMPLATE *tmpl) | |
a61b7f2f DO |
565 | { |
566 | return tmpl != NULL ? tmpl->serialNumber : NULL; | |
567 | } | |
568 | ||
569 | /* retrieves the issuer name of the given cert template or NULL on error */ | |
8cc86b81 DDO |
570 | const X509_NAME |
571 | *OSSL_CRMF_CERTTEMPLATE_get0_issuer(const OSSL_CRMF_CERTTEMPLATE *tmpl) | |
a61b7f2f DO |
572 | { |
573 | return tmpl != NULL ? tmpl->issuer : NULL; | |
574 | } | |
575 | ||
7960dbec | 576 | /* retrieves the issuer name of the given CertId or NULL on error */ |
8cc86b81 | 577 | const X509_NAME *OSSL_CRMF_CERTID_get0_issuer(const OSSL_CRMF_CERTID *cid) |
7960dbec DDO |
578 | { |
579 | return cid != NULL && cid->issuer->type == GEN_DIRNAME ? | |
580 | cid->issuer->d.directoryName : NULL; | |
581 | } | |
582 | ||
583 | /* retrieves the serialNumber of the given CertId or NULL on error */ | |
584 | ASN1_INTEGER *OSSL_CRMF_CERTID_get0_serialNumber(const OSSL_CRMF_CERTID *cid) | |
585 | { | |
586 | return cid != NULL ? cid->serialNumber : NULL; | |
587 | } | |
588 | ||
589 | /*- | |
a61b7f2f DO |
590 | * fill in certificate template. |
591 | * Any value argument that is NULL will leave the respective field unchanged. | |
592 | */ | |
593 | int OSSL_CRMF_CERTTEMPLATE_fill(OSSL_CRMF_CERTTEMPLATE *tmpl, | |
594 | EVP_PKEY *pubkey, | |
595 | const X509_NAME *subject, | |
596 | const X509_NAME *issuer, | |
597 | const ASN1_INTEGER *serial) | |
598 | { | |
599 | if (tmpl == NULL) { | |
600 | CRMFerr(CRMF_F_OSSL_CRMF_CERTTEMPLATE_FILL, CRMF_R_NULL_ARGUMENT); | |
601 | return 0; | |
602 | } | |
8cc86b81 | 603 | if (subject != NULL && !X509_NAME_set((X509_NAME **)&tmpl->subject, subject)) |
7960dbec | 604 | return 0; |
8cc86b81 | 605 | if (issuer != NULL && !X509_NAME_set((X509_NAME **)&tmpl->issuer, issuer)) |
7960dbec | 606 | return 0; |
a61b7f2f DO |
607 | if (serial != NULL) { |
608 | ASN1_INTEGER_free(tmpl->serialNumber); | |
609 | if ((tmpl->serialNumber = ASN1_INTEGER_dup(serial)) == NULL) | |
7960dbec | 610 | return 0; |
a61b7f2f DO |
611 | } |
612 | if (pubkey != NULL && !X509_PUBKEY_set(&tmpl->publicKey, pubkey)) | |
7960dbec | 613 | return 0; |
a61b7f2f | 614 | return 1; |
a61b7f2f DO |
615 | } |
616 | ||
617 | ||
618 | /*- | |
7960dbec DDO |
619 | * Decrypts the certificate in the given encryptedValue using private key pkey. |
620 | * This is needed for the indirect PoP method as in RFC 4210 section 5.2.8.2. | |
a61b7f2f DO |
621 | * |
622 | * returns a pointer to the decrypted certificate | |
623 | * returns NULL on error or if no certificate available | |
624 | */ | |
62dcd2aa | 625 | X509 *OSSL_CRMF_ENCRYPTEDVALUE_get1_encCert(const OSSL_CRMF_ENCRYPTEDVALUE *ecert, |
a61b7f2f DO |
626 | EVP_PKEY *pkey) |
627 | { | |
628 | X509 *cert = NULL; /* decrypted certificate */ | |
629 | EVP_CIPHER_CTX *evp_ctx = NULL; /* context for symmetric encryption */ | |
630 | unsigned char *ek = NULL; /* decrypted symmetric encryption key */ | |
f3f3318a | 631 | size_t eksize = 0; /* size of decrypted symmetric encryption key */ |
a61b7f2f | 632 | const EVP_CIPHER *cipher = NULL; /* used cipher */ |
f3f3318a | 633 | int cikeysize = 0; /* key size from cipher */ |
a61b7f2f DO |
634 | unsigned char *iv = NULL; /* initial vector for symmetric encryption */ |
635 | unsigned char *outbuf = NULL; /* decryption output buffer */ | |
636 | const unsigned char *p = NULL; /* needed for decoding ASN1 */ | |
637 | int symmAlg = 0; /* NIDs for symmetric algorithm */ | |
638 | int n, outlen = 0; | |
639 | EVP_PKEY_CTX *pkctx = NULL; /* private key context */ | |
640 | ||
641 | if (ecert == NULL || ecert->symmAlg == NULL || ecert->encSymmKey == NULL | |
642 | || ecert->encValue == NULL || pkey == NULL) { | |
643 | CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT, | |
644 | CRMF_R_NULL_ARGUMENT); | |
645 | return NULL; | |
646 | } | |
647 | if ((symmAlg = OBJ_obj2nid(ecert->symmAlg->algorithm)) == 0) { | |
648 | CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT, | |
649 | CRMF_R_UNSUPPORTED_CIPHER); | |
650 | return NULL; | |
651 | } | |
f3f3318a AK |
652 | /* select symmetric cipher based on algorithm given in message */ |
653 | if ((cipher = EVP_get_cipherbynid(symmAlg)) == NULL) { | |
654 | CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT, | |
655 | CRMF_R_UNSUPPORTED_CIPHER); | |
656 | goto end; | |
657 | } | |
658 | cikeysize = EVP_CIPHER_key_length(cipher); | |
a61b7f2f DO |
659 | /* first the symmetric key needs to be decrypted */ |
660 | pkctx = EVP_PKEY_CTX_new(pkey, NULL); | |
661 | if (pkctx != NULL && EVP_PKEY_decrypt_init(pkctx)) { | |
662 | ASN1_BIT_STRING *encKey = ecert->encSymmKey; | |
f3f3318a AK |
663 | size_t failure; |
664 | int retval; | |
a61b7f2f | 665 | |
f3f3318a AK |
666 | if (EVP_PKEY_decrypt(pkctx, NULL, &eksize, |
667 | encKey->data, encKey->length) <= 0 | |
668 | || (ek = OPENSSL_malloc(eksize)) == NULL) | |
7960dbec | 669 | goto end; |
f3f3318a AK |
670 | retval = EVP_PKEY_decrypt(pkctx, ek, &eksize, |
671 | encKey->data, encKey->length); | |
672 | ERR_clear_error(); /* error state may have sensitive information */ | |
673 | failure = ~constant_time_is_zero_s(constant_time_msb(retval) | |
674 | | constant_time_is_zero(retval)); | |
675 | failure |= ~constant_time_eq_s(eksize, (size_t)cikeysize); | |
676 | if (failure) { | |
a61b7f2f DO |
677 | CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT, |
678 | CRMF_R_ERROR_DECRYPTING_SYMMETRIC_KEY); | |
679 | goto end; | |
680 | } | |
681 | } else { | |
7960dbec | 682 | goto end; |
a61b7f2f | 683 | } |
a61b7f2f | 684 | if ((iv = OPENSSL_malloc(EVP_CIPHER_iv_length(cipher))) == NULL) |
7960dbec | 685 | goto end; |
a61b7f2f | 686 | if (ASN1_TYPE_get_octetstring(ecert->symmAlg->parameter, iv, |
3dbc5156 | 687 | EVP_CIPHER_iv_length(cipher)) |
a61b7f2f DO |
688 | != EVP_CIPHER_iv_length(cipher)) { |
689 | CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT, | |
690 | CRMF_R_MALFORMED_IV); | |
691 | goto end; | |
692 | } | |
693 | ||
694 | /* | |
695 | * d2i_X509 changes the given pointer, so use p for decoding the message and | |
696 | * keep the original pointer in outbuf so the memory can be freed later | |
697 | */ | |
698 | if ((p = outbuf = OPENSSL_malloc(ecert->encValue->length + | |
699 | EVP_CIPHER_block_size(cipher))) == NULL | |
700 | || (evp_ctx = EVP_CIPHER_CTX_new()) == NULL) | |
7960dbec | 701 | goto end; |
a61b7f2f DO |
702 | EVP_CIPHER_CTX_set_padding(evp_ctx, 0); |
703 | ||
704 | if (!EVP_DecryptInit(evp_ctx, cipher, ek, iv) | |
705 | || !EVP_DecryptUpdate(evp_ctx, outbuf, &outlen, | |
706 | ecert->encValue->data, | |
707 | ecert->encValue->length) | |
708 | || !EVP_DecryptFinal(evp_ctx, outbuf + outlen, &n)) { | |
709 | CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT, | |
710 | CRMF_R_ERROR_DECRYPTING_CERTIFICATE); | |
711 | goto end; | |
712 | } | |
713 | outlen += n; | |
714 | ||
715 | /* convert decrypted certificate from DER to internal ASN.1 structure */ | |
716 | if ((cert = d2i_X509(NULL, &p, outlen)) == NULL) { | |
717 | CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT, | |
718 | CRMF_R_ERROR_DECODING_CERTIFICATE); | |
719 | } | |
a61b7f2f DO |
720 | end: |
721 | EVP_PKEY_CTX_free(pkctx); | |
722 | OPENSSL_free(outbuf); | |
723 | EVP_CIPHER_CTX_free(evp_ctx); | |
f3f3318a | 724 | OPENSSL_clear_free(ek, eksize); |
a61b7f2f DO |
725 | OPENSSL_free(iv); |
726 | return cert; | |
727 | } |