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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 | ||
852c2ed2 RS |
39 | DEFINE_STACK_OF(X509_EXTENSION) |
40 | DEFINE_STACK_OF(OSSL_CRMF_MSG) | |
41 | ||
a61b7f2f DO |
42 | /*- |
43 | * atyp = Attribute Type | |
44 | * valt = Value Type | |
45 | * ctrlinf = "regCtrl" or "regInfo" | |
46 | */ | |
47 | #define IMPLEMENT_CRMF_CTRL_FUNC(atyp, valt, ctrlinf) \ | |
48 | int OSSL_CRMF_MSG_set1_##ctrlinf##_##atyp(OSSL_CRMF_MSG *msg, \ | |
49 | const valt *in) \ | |
50 | { \ | |
51 | OSSL_CRMF_ATTRIBUTETYPEANDVALUE *atav = NULL; \ | |
52 | \ | |
235595c4 | 53 | if (msg == NULL || in == NULL) \ |
a61b7f2f DO |
54 | goto err; \ |
55 | if ((atav = OSSL_CRMF_ATTRIBUTETYPEANDVALUE_new()) == NULL) \ | |
56 | goto err; \ | |
57 | if ((atav->type = OBJ_nid2obj(NID_id_##ctrlinf##_##atyp)) == NULL) \ | |
58 | goto err; \ | |
59 | if ((atav->value.atyp = valt##_dup(in)) == NULL) \ | |
60 | goto err; \ | |
61 | if (!OSSL_CRMF_MSG_push0_##ctrlinf(msg, atav)) \ | |
62 | goto err; \ | |
63 | return 1; \ | |
64 | err: \ | |
65 | OSSL_CRMF_ATTRIBUTETYPEANDVALUE_free(atav); \ | |
66 | return 0; \ | |
67 | } | |
68 | ||
69 | ||
70 | /*- | |
71 | * Pushes the given control attribute into the controls stack of a CertRequest | |
72 | * (section 6) | |
73 | * returns 1 on success, 0 on error | |
74 | */ | |
75 | static int OSSL_CRMF_MSG_push0_regCtrl(OSSL_CRMF_MSG *crm, | |
76 | OSSL_CRMF_ATTRIBUTETYPEANDVALUE *ctrl) | |
77 | { | |
78 | int new = 0; | |
79 | ||
80 | if (crm == NULL || crm->certReq == NULL || ctrl == NULL) { | |
81 | CRMFerr(CRMF_F_OSSL_CRMF_MSG_PUSH0_REGCTRL, CRMF_R_NULL_ARGUMENT); | |
82 | return 0; | |
83 | } | |
84 | ||
85 | if (crm->certReq->controls == NULL) { | |
86 | crm->certReq->controls = sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_new_null(); | |
87 | if (crm->certReq->controls == NULL) | |
7960dbec | 88 | goto err; |
a61b7f2f DO |
89 | new = 1; |
90 | } | |
91 | if (!sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_push(crm->certReq->controls, ctrl)) | |
7960dbec | 92 | goto err; |
a61b7f2f DO |
93 | |
94 | return 1; | |
7960dbec | 95 | err: |
a61b7f2f DO |
96 | if (new != 0) { |
97 | sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_free(crm->certReq->controls); | |
98 | crm->certReq->controls = NULL; | |
99 | } | |
100 | return 0; | |
101 | } | |
102 | ||
3dbc5156 | 103 | /* id-regCtrl-regToken Control (section 6.1) */ |
a61b7f2f DO |
104 | IMPLEMENT_CRMF_CTRL_FUNC(regToken, ASN1_STRING, regCtrl) |
105 | ||
3dbc5156 | 106 | /* id-regCtrl-authenticator Control (section 6.2) */ |
a61b7f2f DO |
107 | #define ASN1_UTF8STRING_dup ASN1_STRING_dup |
108 | IMPLEMENT_CRMF_CTRL_FUNC(authenticator, ASN1_UTF8STRING, regCtrl) | |
109 | ||
110 | int OSSL_CRMF_MSG_set0_SinglePubInfo(OSSL_CRMF_SINGLEPUBINFO *spi, | |
111 | int method, GENERAL_NAME *nm) | |
112 | { | |
113 | if (spi == NULL | |
114 | || method < OSSL_CRMF_PUB_METHOD_DONTCARE | |
115 | || method > OSSL_CRMF_PUB_METHOD_LDAP) { | |
116 | CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET0_SINGLEPUBINFO, | |
117 | ERR_R_PASSED_INVALID_ARGUMENT); | |
118 | return 0; | |
119 | } | |
120 | ||
121 | if (!ASN1_INTEGER_set(spi->pubMethod, method)) | |
122 | return 0; | |
123 | GENERAL_NAME_free(spi->pubLocation); | |
124 | spi->pubLocation = nm; | |
125 | return 1; | |
126 | } | |
127 | ||
235595c4 DDO |
128 | int |
129 | OSSL_CRMF_MSG_PKIPublicationInfo_push0_SinglePubInfo(OSSL_CRMF_PKIPUBLICATIONINFO *pi, | |
130 | OSSL_CRMF_SINGLEPUBINFO *spi) | |
a61b7f2f DO |
131 | { |
132 | if (pi == NULL || spi == NULL) { | |
133 | CRMFerr(CRMF_F_OSSL_CRMF_MSG_PKIPUBLICATIONINFO_PUSH0_SINGLEPUBINFO, | |
134 | CRMF_R_NULL_ARGUMENT); | |
135 | return 0; | |
136 | } | |
137 | if (pi->pubInfos == NULL) | |
138 | pi->pubInfos = sk_OSSL_CRMF_SINGLEPUBINFO_new_null(); | |
139 | if (pi->pubInfos == NULL) | |
7960dbec | 140 | return 0; |
a61b7f2f | 141 | |
7960dbec | 142 | return sk_OSSL_CRMF_SINGLEPUBINFO_push(pi->pubInfos, spi); |
a61b7f2f DO |
143 | } |
144 | ||
235595c4 DDO |
145 | int OSSL_CRMF_MSG_set_PKIPublicationInfo_action(OSSL_CRMF_PKIPUBLICATIONINFO *pi, |
146 | int action) | |
a61b7f2f DO |
147 | { |
148 | if (pi == NULL | |
149 | || action < OSSL_CRMF_PUB_ACTION_DONTPUBLISH | |
150 | || action > OSSL_CRMF_PUB_ACTION_PLEASEPUBLISH) { | |
151 | CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET_PKIPUBLICATIONINFO_ACTION, | |
152 | ERR_R_PASSED_INVALID_ARGUMENT); | |
153 | return 0; | |
154 | } | |
155 | ||
156 | return ASN1_INTEGER_set(pi->action, action); | |
157 | } | |
158 | ||
3dbc5156 | 159 | /* id-regCtrl-pkiPublicationInfo Control (section 6.3) */ |
a61b7f2f DO |
160 | IMPLEMENT_CRMF_CTRL_FUNC(pkiPublicationInfo, OSSL_CRMF_PKIPUBLICATIONINFO, |
161 | regCtrl) | |
162 | ||
3dbc5156 | 163 | /* id-regCtrl-oldCertID Control (section 6.5) from the given */ |
a61b7f2f DO |
164 | IMPLEMENT_CRMF_CTRL_FUNC(oldCertID, OSSL_CRMF_CERTID, regCtrl) |
165 | ||
166 | OSSL_CRMF_CERTID *OSSL_CRMF_CERTID_gen(const X509_NAME *issuer, | |
167 | const ASN1_INTEGER *serial) | |
168 | { | |
169 | OSSL_CRMF_CERTID *cid = NULL; | |
170 | ||
171 | if (issuer == NULL || serial == NULL) { | |
172 | CRMFerr(CRMF_F_OSSL_CRMF_CERTID_GEN, CRMF_R_NULL_ARGUMENT); | |
173 | return NULL; | |
174 | } | |
175 | ||
176 | if ((cid = OSSL_CRMF_CERTID_new()) == NULL) | |
7960dbec | 177 | goto err; |
a61b7f2f DO |
178 | |
179 | if (!X509_NAME_set(&cid->issuer->d.directoryName, issuer)) | |
7960dbec | 180 | goto err; |
a61b7f2f DO |
181 | cid->issuer->type = GEN_DIRNAME; |
182 | ||
183 | ASN1_INTEGER_free(cid->serialNumber); | |
184 | if ((cid->serialNumber = ASN1_INTEGER_dup(serial)) == NULL) | |
7960dbec | 185 | goto err; |
a61b7f2f DO |
186 | |
187 | return cid; | |
188 | ||
7960dbec | 189 | err: |
a61b7f2f DO |
190 | OSSL_CRMF_CERTID_free(cid); |
191 | return NULL; | |
192 | } | |
193 | ||
3dbc5156 DDO |
194 | /* |
195 | * id-regCtrl-protocolEncrKey Control (section 6.6) | |
196 | */ | |
a61b7f2f DO |
197 | IMPLEMENT_CRMF_CTRL_FUNC(protocolEncrKey, X509_PUBKEY, regCtrl) |
198 | ||
199 | /*- | |
200 | * Pushes the attribute given in regInfo in to the CertReqMsg->regInfo stack. | |
201 | * (section 7) | |
202 | * returns 1 on success, 0 on error | |
203 | */ | |
204 | static int OSSL_CRMF_MSG_push0_regInfo(OSSL_CRMF_MSG *crm, | |
205 | OSSL_CRMF_ATTRIBUTETYPEANDVALUE *ri) | |
206 | { | |
207 | STACK_OF(OSSL_CRMF_ATTRIBUTETYPEANDVALUE) *info = NULL; | |
208 | ||
209 | if (crm == NULL || ri == NULL) { | |
210 | CRMFerr(CRMF_F_OSSL_CRMF_MSG_PUSH0_REGINFO, CRMF_R_NULL_ARGUMENT); | |
211 | return 0; | |
212 | } | |
213 | ||
214 | if (crm->regInfo == NULL) | |
215 | crm->regInfo = info = sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_new_null(); | |
216 | if (crm->regInfo == NULL) | |
7960dbec | 217 | goto err; |
a61b7f2f | 218 | if (!sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_push(crm->regInfo, ri)) |
7960dbec | 219 | goto err; |
a61b7f2f DO |
220 | return 1; |
221 | ||
7960dbec | 222 | err: |
a61b7f2f DO |
223 | if (info != NULL) |
224 | crm->regInfo = NULL; | |
225 | sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_free(info); | |
226 | return 0; | |
227 | } | |
228 | ||
229 | /* id-regInfo-utf8Pairs to regInfo (section 7.1) */ | |
230 | IMPLEMENT_CRMF_CTRL_FUNC(utf8Pairs, ASN1_UTF8STRING, regInfo) | |
231 | ||
232 | /* id-regInfo-certReq to regInfo (section 7.2) */ | |
233 | IMPLEMENT_CRMF_CTRL_FUNC(certReq, OSSL_CRMF_CERTREQUEST, regInfo) | |
234 | ||
235 | ||
236 | /* retrieves the certificate template of crm */ | |
237 | OSSL_CRMF_CERTTEMPLATE *OSSL_CRMF_MSG_get0_tmpl(const OSSL_CRMF_MSG *crm) | |
238 | { | |
239 | if (crm == NULL || crm->certReq == NULL) { | |
240 | CRMFerr(CRMF_F_OSSL_CRMF_MSG_GET0_TMPL, CRMF_R_NULL_ARGUMENT); | |
241 | return NULL; | |
242 | } | |
243 | return crm->certReq->certTemplate; | |
244 | } | |
245 | ||
246 | ||
11baa470 DDO |
247 | int OSSL_CRMF_MSG_set0_validity(OSSL_CRMF_MSG *crm, |
248 | ASN1_TIME *notBefore, ASN1_TIME *notAfter) | |
a61b7f2f | 249 | { |
11baa470 | 250 | OSSL_CRMF_OPTIONALVALIDITY *vld; |
a61b7f2f DO |
251 | OSSL_CRMF_CERTTEMPLATE *tmpl = OSSL_CRMF_MSG_get0_tmpl(crm); |
252 | ||
253 | if (tmpl == NULL) { /* also crm == NULL implies this */ | |
11baa470 | 254 | CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET0_VALIDITY, CRMF_R_NULL_ARGUMENT); |
a61b7f2f DO |
255 | return 0; |
256 | } | |
257 | ||
a61b7f2f | 258 | if ((vld = OSSL_CRMF_OPTIONALVALIDITY_new()) == NULL) |
11baa470 DDO |
259 | return 0; |
260 | vld->notBefore = notBefore; | |
261 | vld->notAfter = notAfter; | |
a61b7f2f | 262 | tmpl->validity = vld; |
a61b7f2f | 263 | return 1; |
a61b7f2f DO |
264 | } |
265 | ||
266 | ||
267 | int OSSL_CRMF_MSG_set_certReqId(OSSL_CRMF_MSG *crm, int rid) | |
268 | { | |
269 | if (crm == NULL || crm->certReq == NULL || crm->certReq->certReqId == NULL) { | |
270 | CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET_CERTREQID, CRMF_R_NULL_ARGUMENT); | |
271 | return 0; | |
272 | } | |
273 | ||
274 | return ASN1_INTEGER_set(crm->certReq->certReqId, rid); | |
275 | } | |
276 | ||
277 | /* get ASN.1 encoded integer, return -1 on error */ | |
aac96e27 | 278 | static int crmf_asn1_get_int(const ASN1_INTEGER *a) |
a61b7f2f DO |
279 | { |
280 | int64_t res; | |
281 | ||
282 | if (!ASN1_INTEGER_get_int64(&res, a)) { | |
aac96e27 | 283 | CRMFerr(0, ASN1_R_INVALID_NUMBER); |
a61b7f2f DO |
284 | return -1; |
285 | } | |
286 | if (res < INT_MIN) { | |
aac96e27 | 287 | CRMFerr(0, ASN1_R_TOO_SMALL); |
a61b7f2f DO |
288 | return -1; |
289 | } | |
290 | if (res > INT_MAX) { | |
aac96e27 | 291 | CRMFerr(0, ASN1_R_TOO_LARGE); |
a61b7f2f DO |
292 | return -1; |
293 | } | |
294 | return (int)res; | |
295 | } | |
296 | ||
62dcd2aa | 297 | int OSSL_CRMF_MSG_get_certReqId(const OSSL_CRMF_MSG *crm) |
a61b7f2f DO |
298 | { |
299 | if (crm == NULL || /* not really needed: */ crm->certReq == NULL) { | |
300 | CRMFerr(CRMF_F_OSSL_CRMF_MSG_GET_CERTREQID, CRMF_R_NULL_ARGUMENT); | |
301 | return -1; | |
302 | } | |
aac96e27 | 303 | return crmf_asn1_get_int(crm->certReq->certReqId); |
a61b7f2f DO |
304 | } |
305 | ||
306 | ||
307 | int OSSL_CRMF_MSG_set0_extensions(OSSL_CRMF_MSG *crm, | |
308 | X509_EXTENSIONS *exts) | |
309 | { | |
310 | OSSL_CRMF_CERTTEMPLATE *tmpl = OSSL_CRMF_MSG_get0_tmpl(crm); | |
311 | ||
312 | if (tmpl == NULL) { /* also crm == NULL implies this */ | |
313 | CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET0_EXTENSIONS, CRMF_R_NULL_ARGUMENT); | |
314 | return 0; | |
315 | } | |
316 | ||
317 | if (sk_X509_EXTENSION_num(exts) == 0) { | |
318 | sk_X509_EXTENSION_free(exts); | |
319 | exts = NULL; /* do not include empty extensions list */ | |
320 | } | |
321 | ||
322 | sk_X509_EXTENSION_pop_free(tmpl->extensions, X509_EXTENSION_free); | |
323 | tmpl->extensions = exts; | |
324 | return 1; | |
325 | } | |
326 | ||
327 | ||
328 | int OSSL_CRMF_MSG_push0_extension(OSSL_CRMF_MSG *crm, | |
7960dbec | 329 | X509_EXTENSION *ext) |
a61b7f2f DO |
330 | { |
331 | int new = 0; | |
332 | OSSL_CRMF_CERTTEMPLATE *tmpl = OSSL_CRMF_MSG_get0_tmpl(crm); | |
333 | ||
334 | if (tmpl == NULL || ext == NULL) { /* also crm == NULL implies this */ | |
335 | CRMFerr(CRMF_F_OSSL_CRMF_MSG_PUSH0_EXTENSION, CRMF_R_NULL_ARGUMENT); | |
336 | return 0; | |
337 | } | |
338 | ||
339 | if (tmpl->extensions == NULL) { | |
340 | if ((tmpl->extensions = sk_X509_EXTENSION_new_null()) == NULL) | |
7960dbec | 341 | goto err; |
a61b7f2f DO |
342 | new = 1; |
343 | } | |
344 | ||
7960dbec DDO |
345 | if (!sk_X509_EXTENSION_push(tmpl->extensions, ext)) |
346 | goto err; | |
a61b7f2f | 347 | return 1; |
7960dbec | 348 | err: |
a61b7f2f DO |
349 | if (new != 0) { |
350 | sk_X509_EXTENSION_free(tmpl->extensions); | |
351 | tmpl->extensions = NULL; | |
352 | } | |
353 | return 0; | |
354 | } | |
355 | ||
356 | /* TODO: support cases 1+2 (besides case 3) defined in RFC 4211, section 4.1. */ | |
357 | static int CRMF_poposigningkey_init(OSSL_CRMF_POPOSIGNINGKEY *ps, | |
358 | OSSL_CRMF_CERTREQUEST *cr, | |
359 | EVP_PKEY *pkey, int dgst) | |
360 | { | |
a61b7f2f | 361 | int ret = 0; |
db4b3d83 RL |
362 | EVP_MD *fetched_md = NULL; |
363 | const EVP_MD *md = EVP_get_digestbynid(dgst); | |
a61b7f2f DO |
364 | |
365 | if (ps == NULL || cr == NULL || pkey == NULL) { | |
366 | CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT, CRMF_R_NULL_ARGUMENT); | |
367 | return 0; | |
368 | } | |
369 | ||
db4b3d83 RL |
370 | /* If we didn't find legacy MD, we try an implicit fetch */ |
371 | if (md == NULL) | |
372 | md = fetched_md = EVP_MD_fetch(NULL, OBJ_nid2sn(dgst), NULL); | |
a61b7f2f | 373 | |
db4b3d83 | 374 | if (md == NULL) { |
a61b7f2f DO |
375 | CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT, |
376 | CRMF_R_UNSUPPORTED_ALG_FOR_POPSIGNINGKEY); | |
db4b3d83 | 377 | return 0; |
a61b7f2f | 378 | } |
a61b7f2f | 379 | |
db4b3d83 RL |
380 | ret = ASN1_item_sign(ASN1_ITEM_rptr(OSSL_CRMF_CERTREQUEST), |
381 | ps->algorithmIdentifier, NULL, ps->signature, | |
382 | cr, pkey, md); | |
383 | ||
384 | EVP_MD_free(fetched_md); | |
a61b7f2f DO |
385 | return ret; |
386 | } | |
387 | ||
388 | ||
389 | int OSSL_CRMF_MSG_create_popo(OSSL_CRMF_MSG *crm, EVP_PKEY *pkey, | |
390 | int dgst, int ppmtd) | |
391 | { | |
392 | OSSL_CRMF_POPO *pp = NULL; | |
393 | ASN1_INTEGER *tag = NULL; | |
394 | ||
395 | if (crm == NULL || (ppmtd == OSSL_CRMF_POPO_SIGNATURE && pkey == NULL)) { | |
396 | CRMFerr(CRMF_F_OSSL_CRMF_MSG_CREATE_POPO, CRMF_R_NULL_ARGUMENT); | |
397 | return 0; | |
398 | } | |
399 | ||
400 | if (ppmtd == OSSL_CRMF_POPO_NONE) | |
401 | goto end; | |
402 | if ((pp = OSSL_CRMF_POPO_new()) == NULL) | |
7960dbec | 403 | goto err; |
a61b7f2f DO |
404 | pp->type = ppmtd; |
405 | ||
406 | switch (ppmtd) { | |
407 | case OSSL_CRMF_POPO_RAVERIFIED: | |
408 | if ((pp->value.raVerified = ASN1_NULL_new()) == NULL) | |
7960dbec | 409 | goto err; |
a61b7f2f DO |
410 | break; |
411 | ||
412 | case OSSL_CRMF_POPO_SIGNATURE: | |
413 | { | |
414 | OSSL_CRMF_POPOSIGNINGKEY *ps = OSSL_CRMF_POPOSIGNINGKEY_new(); | |
415 | if (ps == NULL | |
235595c4 | 416 | || !CRMF_poposigningkey_init(ps, crm->certReq, pkey, dgst)) { |
a61b7f2f DO |
417 | OSSL_CRMF_POPOSIGNINGKEY_free(ps); |
418 | goto err; | |
419 | } | |
420 | pp->value.signature = ps; | |
421 | } | |
422 | break; | |
423 | ||
424 | case OSSL_CRMF_POPO_KEYENC: | |
425 | if ((pp->value.keyEncipherment = OSSL_CRMF_POPOPRIVKEY_new()) == NULL) | |
7960dbec | 426 | goto err; |
a61b7f2f DO |
427 | tag = ASN1_INTEGER_new(); |
428 | pp->value.keyEncipherment->type = | |
429 | OSSL_CRMF_POPOPRIVKEY_SUBSEQUENTMESSAGE; | |
430 | pp->value.keyEncipherment->value.subsequentMessage = tag; | |
431 | if (tag == NULL | |
432 | || !ASN1_INTEGER_set(tag, OSSL_CRMF_SUBSEQUENTMESSAGE_ENCRCERT)) | |
7960dbec | 433 | goto err; |
a61b7f2f DO |
434 | break; |
435 | ||
436 | default: | |
437 | CRMFerr(CRMF_F_OSSL_CRMF_MSG_CREATE_POPO, | |
438 | CRMF_R_UNSUPPORTED_METHOD_FOR_CREATING_POPO); | |
439 | goto err; | |
440 | } | |
441 | ||
442 | end: | |
443 | OSSL_CRMF_POPO_free(crm->popo); | |
444 | crm->popo = pp; | |
445 | ||
446 | return 1; | |
a61b7f2f DO |
447 | err: |
448 | OSSL_CRMF_POPO_free(pp); | |
449 | return 0; | |
450 | } | |
451 | ||
a61b7f2f DO |
452 | /* verifies the Proof-of-Possession of the request with the given rid in reqs */ |
453 | int OSSL_CRMF_MSGS_verify_popo(const OSSL_CRMF_MSGS *reqs, | |
454 | int rid, int acceptRAVerified) | |
455 | { | |
456 | OSSL_CRMF_MSG *req = NULL; | |
457 | X509_PUBKEY *pubkey = NULL; | |
458 | OSSL_CRMF_POPOSIGNINGKEY *sig = NULL; | |
459 | ||
7269071e DDO |
460 | if (reqs == NULL || (req = sk_OSSL_CRMF_MSG_value(reqs, rid)) == NULL) { |
461 | CRMFerr(CRMF_F_OSSL_CRMF_MSGS_VERIFY_POPO, CRMF_R_NULL_ARGUMENT); | |
462 | return 0; | |
463 | } | |
464 | ||
465 | if (req->popo == NULL) { | |
466 | CRMFerr(0, CRMF_R_POPO_MISSING); | |
a61b7f2f DO |
467 | return 0; |
468 | } | |
469 | ||
470 | switch (req->popo->type) { | |
471 | case OSSL_CRMF_POPO_RAVERIFIED: | |
62dcd2aa DDO |
472 | if (!acceptRAVerified) { |
473 | CRMFerr(0, CRMF_R_POPO_RAVERIFIED_NOT_ACCEPTED); | |
474 | return 0; | |
475 | } | |
a61b7f2f DO |
476 | break; |
477 | case OSSL_CRMF_POPO_SIGNATURE: | |
478 | pubkey = req->certReq->certTemplate->publicKey; | |
62dcd2aa DDO |
479 | if (pubkey == NULL) { |
480 | CRMFerr(0, CRMF_R_POPO_MISSING_PUBLIC_KEY); | |
481 | return 0; | |
482 | } | |
a61b7f2f DO |
483 | sig = req->popo->value.signature; |
484 | if (sig->poposkInput != NULL) { | |
485 | /* | |
486 | * According to RFC 4211: publicKey contains a copy of | |
487 | * the public key from the certificate template. This MUST be | |
488 | * exactly the same value as contained in the certificate template. | |
489 | */ | |
62dcd2aa DDO |
490 | if (sig->poposkInput->publicKey == NULL) { |
491 | CRMFerr(0, CRMF_R_POPO_MISSING_PUBLIC_KEY); | |
492 | return 0; | |
493 | } | |
93f99b68 | 494 | if (X509_PUBKEY_eq(pubkey, sig->poposkInput->publicKey) != 1) { |
62dcd2aa DDO |
495 | CRMFerr(0, CRMF_R_POPO_INCONSISTENT_PUBLIC_KEY); |
496 | return 0; | |
497 | } | |
498 | /* | |
499 | * TODO check the contents of the authInfo sub-field, | |
500 | * see RFC 4211 https://tools.ietf.org/html/rfc4211#section-4.1 | |
501 | */ | |
502 | if (ASN1_item_verify(ASN1_ITEM_rptr(OSSL_CRMF_POPOSIGNINGKEYINPUT), | |
503 | sig->algorithmIdentifier, sig->signature, | |
504 | sig->poposkInput, | |
505 | X509_PUBKEY_get0(pubkey)) < 1) | |
506 | return 0; | |
a61b7f2f | 507 | } else { |
62dcd2aa DDO |
508 | if (req->certReq->certTemplate->subject == NULL) { |
509 | CRMFerr(0, CRMF_R_POPO_MISSING_SUBJECT); | |
510 | return 0; | |
511 | } | |
512 | if (ASN1_item_verify(ASN1_ITEM_rptr(OSSL_CRMF_CERTREQUEST), | |
513 | sig->algorithmIdentifier, sig->signature, | |
514 | req->certReq, X509_PUBKEY_get0(pubkey)) < 1) | |
515 | return 0; | |
a61b7f2f | 516 | } |
62dcd2aa | 517 | break; |
a61b7f2f DO |
518 | case OSSL_CRMF_POPO_KEYENC: |
519 | /* | |
520 | * TODO: when OSSL_CMP_certrep_new() supports encrypted certs, | |
521 | * return 1 if the type of req->popo->value.keyEncipherment | |
522 | * is OSSL_CRMF_POPOPRIVKEY_SUBSEQUENTMESSAGE and | |
523 | * its value.subsequentMessage == OSSL_CRMF_SUBSEQUENTMESSAGE_ENCRCERT | |
3dbc5156 | 524 | */ |
a61b7f2f DO |
525 | case OSSL_CRMF_POPO_KEYAGREE: |
526 | default: | |
527 | CRMFerr(CRMF_F_OSSL_CRMF_MSGS_VERIFY_POPO, | |
528 | CRMF_R_UNSUPPORTED_POPO_METHOD); | |
529 | return 0; | |
530 | } | |
62dcd2aa | 531 | return 1; |
a61b7f2f DO |
532 | } |
533 | ||
534 | /* retrieves the serialNumber of the given cert template or NULL on error */ | |
62dcd2aa DDO |
535 | ASN1_INTEGER |
536 | *OSSL_CRMF_CERTTEMPLATE_get0_serialNumber(const OSSL_CRMF_CERTTEMPLATE *tmpl) | |
a61b7f2f DO |
537 | { |
538 | return tmpl != NULL ? tmpl->serialNumber : NULL; | |
539 | } | |
540 | ||
541 | /* retrieves the issuer name of the given cert template or NULL on error */ | |
8cc86b81 DDO |
542 | const X509_NAME |
543 | *OSSL_CRMF_CERTTEMPLATE_get0_issuer(const OSSL_CRMF_CERTTEMPLATE *tmpl) | |
a61b7f2f DO |
544 | { |
545 | return tmpl != NULL ? tmpl->issuer : NULL; | |
546 | } | |
547 | ||
7960dbec | 548 | /* retrieves the issuer name of the given CertId or NULL on error */ |
8cc86b81 | 549 | const X509_NAME *OSSL_CRMF_CERTID_get0_issuer(const OSSL_CRMF_CERTID *cid) |
7960dbec DDO |
550 | { |
551 | return cid != NULL && cid->issuer->type == GEN_DIRNAME ? | |
552 | cid->issuer->d.directoryName : NULL; | |
553 | } | |
554 | ||
555 | /* retrieves the serialNumber of the given CertId or NULL on error */ | |
556 | ASN1_INTEGER *OSSL_CRMF_CERTID_get0_serialNumber(const OSSL_CRMF_CERTID *cid) | |
557 | { | |
558 | return cid != NULL ? cid->serialNumber : NULL; | |
559 | } | |
560 | ||
561 | /*- | |
a61b7f2f DO |
562 | * fill in certificate template. |
563 | * Any value argument that is NULL will leave the respective field unchanged. | |
564 | */ | |
565 | int OSSL_CRMF_CERTTEMPLATE_fill(OSSL_CRMF_CERTTEMPLATE *tmpl, | |
566 | EVP_PKEY *pubkey, | |
567 | const X509_NAME *subject, | |
568 | const X509_NAME *issuer, | |
569 | const ASN1_INTEGER *serial) | |
570 | { | |
571 | if (tmpl == NULL) { | |
572 | CRMFerr(CRMF_F_OSSL_CRMF_CERTTEMPLATE_FILL, CRMF_R_NULL_ARGUMENT); | |
573 | return 0; | |
574 | } | |
8cc86b81 | 575 | if (subject != NULL && !X509_NAME_set((X509_NAME **)&tmpl->subject, subject)) |
7960dbec | 576 | return 0; |
8cc86b81 | 577 | if (issuer != NULL && !X509_NAME_set((X509_NAME **)&tmpl->issuer, issuer)) |
7960dbec | 578 | return 0; |
a61b7f2f DO |
579 | if (serial != NULL) { |
580 | ASN1_INTEGER_free(tmpl->serialNumber); | |
581 | if ((tmpl->serialNumber = ASN1_INTEGER_dup(serial)) == NULL) | |
7960dbec | 582 | return 0; |
a61b7f2f DO |
583 | } |
584 | if (pubkey != NULL && !X509_PUBKEY_set(&tmpl->publicKey, pubkey)) | |
7960dbec | 585 | return 0; |
a61b7f2f | 586 | return 1; |
a61b7f2f DO |
587 | } |
588 | ||
589 | ||
590 | /*- | |
7960dbec DDO |
591 | * Decrypts the certificate in the given encryptedValue using private key pkey. |
592 | * This is needed for the indirect PoP method as in RFC 4210 section 5.2.8.2. | |
a61b7f2f DO |
593 | * |
594 | * returns a pointer to the decrypted certificate | |
595 | * returns NULL on error or if no certificate available | |
596 | */ | |
62dcd2aa | 597 | X509 *OSSL_CRMF_ENCRYPTEDVALUE_get1_encCert(const OSSL_CRMF_ENCRYPTEDVALUE *ecert, |
a61b7f2f DO |
598 | EVP_PKEY *pkey) |
599 | { | |
600 | X509 *cert = NULL; /* decrypted certificate */ | |
601 | EVP_CIPHER_CTX *evp_ctx = NULL; /* context for symmetric encryption */ | |
602 | unsigned char *ek = NULL; /* decrypted symmetric encryption key */ | |
f3f3318a | 603 | size_t eksize = 0; /* size of decrypted symmetric encryption key */ |
a61b7f2f | 604 | const EVP_CIPHER *cipher = NULL; /* used cipher */ |
f3f3318a | 605 | int cikeysize = 0; /* key size from cipher */ |
a61b7f2f DO |
606 | unsigned char *iv = NULL; /* initial vector for symmetric encryption */ |
607 | unsigned char *outbuf = NULL; /* decryption output buffer */ | |
608 | const unsigned char *p = NULL; /* needed for decoding ASN1 */ | |
609 | int symmAlg = 0; /* NIDs for symmetric algorithm */ | |
610 | int n, outlen = 0; | |
611 | EVP_PKEY_CTX *pkctx = NULL; /* private key context */ | |
612 | ||
613 | if (ecert == NULL || ecert->symmAlg == NULL || ecert->encSymmKey == NULL | |
614 | || ecert->encValue == NULL || pkey == NULL) { | |
615 | CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT, | |
616 | CRMF_R_NULL_ARGUMENT); | |
617 | return NULL; | |
618 | } | |
619 | if ((symmAlg = OBJ_obj2nid(ecert->symmAlg->algorithm)) == 0) { | |
620 | CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT, | |
621 | CRMF_R_UNSUPPORTED_CIPHER); | |
622 | return NULL; | |
623 | } | |
f3f3318a AK |
624 | /* select symmetric cipher based on algorithm given in message */ |
625 | if ((cipher = EVP_get_cipherbynid(symmAlg)) == NULL) { | |
626 | CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT, | |
627 | CRMF_R_UNSUPPORTED_CIPHER); | |
628 | goto end; | |
629 | } | |
630 | cikeysize = EVP_CIPHER_key_length(cipher); | |
a61b7f2f DO |
631 | /* first the symmetric key needs to be decrypted */ |
632 | pkctx = EVP_PKEY_CTX_new(pkey, NULL); | |
633 | if (pkctx != NULL && EVP_PKEY_decrypt_init(pkctx)) { | |
634 | ASN1_BIT_STRING *encKey = ecert->encSymmKey; | |
f3f3318a AK |
635 | size_t failure; |
636 | int retval; | |
a61b7f2f | 637 | |
f3f3318a AK |
638 | if (EVP_PKEY_decrypt(pkctx, NULL, &eksize, |
639 | encKey->data, encKey->length) <= 0 | |
640 | || (ek = OPENSSL_malloc(eksize)) == NULL) | |
7960dbec | 641 | goto end; |
f3f3318a AK |
642 | retval = EVP_PKEY_decrypt(pkctx, ek, &eksize, |
643 | encKey->data, encKey->length); | |
644 | ERR_clear_error(); /* error state may have sensitive information */ | |
645 | failure = ~constant_time_is_zero_s(constant_time_msb(retval) | |
646 | | constant_time_is_zero(retval)); | |
647 | failure |= ~constant_time_eq_s(eksize, (size_t)cikeysize); | |
648 | if (failure) { | |
a61b7f2f DO |
649 | CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT, |
650 | CRMF_R_ERROR_DECRYPTING_SYMMETRIC_KEY); | |
651 | goto end; | |
652 | } | |
653 | } else { | |
7960dbec | 654 | goto end; |
a61b7f2f | 655 | } |
a61b7f2f | 656 | if ((iv = OPENSSL_malloc(EVP_CIPHER_iv_length(cipher))) == NULL) |
7960dbec | 657 | goto end; |
a61b7f2f | 658 | if (ASN1_TYPE_get_octetstring(ecert->symmAlg->parameter, iv, |
3dbc5156 | 659 | EVP_CIPHER_iv_length(cipher)) |
a61b7f2f DO |
660 | != EVP_CIPHER_iv_length(cipher)) { |
661 | CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT, | |
662 | CRMF_R_MALFORMED_IV); | |
663 | goto end; | |
664 | } | |
665 | ||
666 | /* | |
667 | * d2i_X509 changes the given pointer, so use p for decoding the message and | |
668 | * keep the original pointer in outbuf so the memory can be freed later | |
669 | */ | |
670 | if ((p = outbuf = OPENSSL_malloc(ecert->encValue->length + | |
671 | EVP_CIPHER_block_size(cipher))) == NULL | |
672 | || (evp_ctx = EVP_CIPHER_CTX_new()) == NULL) | |
7960dbec | 673 | goto end; |
a61b7f2f DO |
674 | EVP_CIPHER_CTX_set_padding(evp_ctx, 0); |
675 | ||
676 | if (!EVP_DecryptInit(evp_ctx, cipher, ek, iv) | |
677 | || !EVP_DecryptUpdate(evp_ctx, outbuf, &outlen, | |
678 | ecert->encValue->data, | |
679 | ecert->encValue->length) | |
680 | || !EVP_DecryptFinal(evp_ctx, outbuf + outlen, &n)) { | |
681 | CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT, | |
682 | CRMF_R_ERROR_DECRYPTING_CERTIFICATE); | |
683 | goto end; | |
684 | } | |
685 | outlen += n; | |
686 | ||
687 | /* convert decrypted certificate from DER to internal ASN.1 structure */ | |
688 | if ((cert = d2i_X509(NULL, &p, outlen)) == NULL) { | |
689 | CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT, | |
690 | CRMF_R_ERROR_DECODING_CERTIFICATE); | |
691 | } | |
a61b7f2f DO |
692 | end: |
693 | EVP_PKEY_CTX_free(pkctx); | |
694 | OPENSSL_free(outbuf); | |
695 | EVP_CIPHER_CTX_free(evp_ctx); | |
f3f3318a | 696 | OPENSSL_clear_free(ek, eksize); |
a61b7f2f DO |
697 | OPENSSL_free(iv); |
698 | return cert; | |
699 | } |