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a61b7f2f | 1 | /*- |
8869ad4a | 2 | * Copyright 2007-2019 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 | \ | |
50 | if (msg == NULL || in == NULL) \ | |
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 | ||
100 | /* id-regCtrl-regToken Control (section 6.1) */ | |
101 | IMPLEMENT_CRMF_CTRL_FUNC(regToken, ASN1_STRING, regCtrl) | |
102 | ||
103 | /* id-regCtrl-authenticator Control (section 6.2) */ | |
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 | ||
125 | int OSSL_CRMF_MSG_PKIPublicationInfo_push0_SinglePubInfo( | |
126 | OSSL_CRMF_PKIPUBLICATIONINFO *pi, | |
127 | OSSL_CRMF_SINGLEPUBINFO *spi) | |
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 | ||
142 | int OSSL_CRMF_MSG_set_PKIPublicationInfo_action( | |
143 | OSSL_CRMF_PKIPUBLICATIONINFO *pi, int action) | |
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 | ||
156 | /* id-regCtrl-pkiPublicationInfo Control (section 6.3) */ | |
157 | IMPLEMENT_CRMF_CTRL_FUNC(pkiPublicationInfo, OSSL_CRMF_PKIPUBLICATIONINFO, | |
158 | regCtrl) | |
159 | ||
160 | /* id-regCtrl-oldCertID Control (section 6.5) from the given */ | |
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 | ||
191 | /* | |
192 | * id-regCtrl-protocolEncrKey Control (section 6.6) | |
193 | * | |
a61b7f2f | 194 | */ |
a61b7f2f DO |
195 | IMPLEMENT_CRMF_CTRL_FUNC(protocolEncrKey, X509_PUBKEY, regCtrl) |
196 | ||
197 | /*- | |
198 | * Pushes the attribute given in regInfo in to the CertReqMsg->regInfo stack. | |
199 | * (section 7) | |
200 | * returns 1 on success, 0 on error | |
201 | */ | |
202 | static int OSSL_CRMF_MSG_push0_regInfo(OSSL_CRMF_MSG *crm, | |
203 | OSSL_CRMF_ATTRIBUTETYPEANDVALUE *ri) | |
204 | { | |
205 | STACK_OF(OSSL_CRMF_ATTRIBUTETYPEANDVALUE) *info = NULL; | |
206 | ||
207 | if (crm == NULL || ri == NULL) { | |
208 | CRMFerr(CRMF_F_OSSL_CRMF_MSG_PUSH0_REGINFO, CRMF_R_NULL_ARGUMENT); | |
209 | return 0; | |
210 | } | |
211 | ||
212 | if (crm->regInfo == NULL) | |
213 | crm->regInfo = info = sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_new_null(); | |
214 | if (crm->regInfo == NULL) | |
7960dbec | 215 | goto err; |
a61b7f2f | 216 | if (!sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_push(crm->regInfo, ri)) |
7960dbec | 217 | goto err; |
a61b7f2f DO |
218 | return 1; |
219 | ||
7960dbec | 220 | err: |
a61b7f2f DO |
221 | if (info != NULL) |
222 | crm->regInfo = NULL; | |
223 | sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_free(info); | |
224 | return 0; | |
225 | } | |
226 | ||
227 | /* id-regInfo-utf8Pairs to regInfo (section 7.1) */ | |
228 | IMPLEMENT_CRMF_CTRL_FUNC(utf8Pairs, ASN1_UTF8STRING, regInfo) | |
229 | ||
230 | /* id-regInfo-certReq to regInfo (section 7.2) */ | |
231 | IMPLEMENT_CRMF_CTRL_FUNC(certReq, OSSL_CRMF_CERTREQUEST, regInfo) | |
232 | ||
233 | ||
234 | /* retrieves the certificate template of crm */ | |
235 | OSSL_CRMF_CERTTEMPLATE *OSSL_CRMF_MSG_get0_tmpl(const OSSL_CRMF_MSG *crm) | |
236 | { | |
237 | if (crm == NULL || crm->certReq == NULL) { | |
238 | CRMFerr(CRMF_F_OSSL_CRMF_MSG_GET0_TMPL, CRMF_R_NULL_ARGUMENT); | |
239 | return NULL; | |
240 | } | |
241 | return crm->certReq->certTemplate; | |
242 | } | |
243 | ||
244 | ||
245 | int OSSL_CRMF_MSG_set_validity(OSSL_CRMF_MSG *crm, time_t from, time_t to) | |
246 | { | |
247 | OSSL_CRMF_OPTIONALVALIDITY *vld = NULL; | |
248 | ASN1_TIME *from_asn = NULL; | |
249 | ASN1_TIME *to_asn = NULL; | |
250 | OSSL_CRMF_CERTTEMPLATE *tmpl = OSSL_CRMF_MSG_get0_tmpl(crm); | |
251 | ||
252 | if (tmpl == NULL) { /* also crm == NULL implies this */ | |
253 | CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET_VALIDITY, CRMF_R_NULL_ARGUMENT); | |
254 | return 0; | |
255 | } | |
256 | ||
257 | if (from != 0 && ((from_asn = ASN1_TIME_set(NULL, from)) == NULL)) | |
7960dbec | 258 | goto err; |
a61b7f2f | 259 | if (to != 0 && ((to_asn = ASN1_TIME_set(NULL, to)) == NULL)) |
7960dbec | 260 | goto err; |
a61b7f2f | 261 | if ((vld = OSSL_CRMF_OPTIONALVALIDITY_new()) == NULL) |
7960dbec | 262 | goto err; |
a61b7f2f DO |
263 | |
264 | vld->notBefore = from_asn; | |
265 | vld->notAfter = to_asn; | |
266 | ||
267 | tmpl->validity = vld; | |
268 | ||
269 | return 1; | |
7960dbec | 270 | err: |
a61b7f2f DO |
271 | ASN1_TIME_free(from_asn); |
272 | ASN1_TIME_free(to_asn); | |
273 | return 0; | |
274 | } | |
275 | ||
276 | ||
277 | int OSSL_CRMF_MSG_set_certReqId(OSSL_CRMF_MSG *crm, int rid) | |
278 | { | |
279 | if (crm == NULL || crm->certReq == NULL || crm->certReq->certReqId == NULL) { | |
280 | CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET_CERTREQID, CRMF_R_NULL_ARGUMENT); | |
281 | return 0; | |
282 | } | |
283 | ||
284 | return ASN1_INTEGER_set(crm->certReq->certReqId, rid); | |
285 | } | |
286 | ||
287 | /* get ASN.1 encoded integer, return -1 on error */ | |
aac96e27 | 288 | static int crmf_asn1_get_int(const ASN1_INTEGER *a) |
a61b7f2f DO |
289 | { |
290 | int64_t res; | |
291 | ||
292 | if (!ASN1_INTEGER_get_int64(&res, a)) { | |
aac96e27 | 293 | CRMFerr(0, ASN1_R_INVALID_NUMBER); |
a61b7f2f DO |
294 | return -1; |
295 | } | |
296 | if (res < INT_MIN) { | |
aac96e27 | 297 | CRMFerr(0, ASN1_R_TOO_SMALL); |
a61b7f2f DO |
298 | return -1; |
299 | } | |
300 | if (res > INT_MAX) { | |
aac96e27 | 301 | CRMFerr(0, ASN1_R_TOO_LARGE); |
a61b7f2f DO |
302 | return -1; |
303 | } | |
304 | return (int)res; | |
305 | } | |
306 | ||
307 | int OSSL_CRMF_MSG_get_certReqId(OSSL_CRMF_MSG *crm) | |
308 | { | |
309 | if (crm == NULL || /* not really needed: */ crm->certReq == NULL) { | |
310 | CRMFerr(CRMF_F_OSSL_CRMF_MSG_GET_CERTREQID, CRMF_R_NULL_ARGUMENT); | |
311 | return -1; | |
312 | } | |
aac96e27 | 313 | return crmf_asn1_get_int(crm->certReq->certReqId); |
a61b7f2f DO |
314 | } |
315 | ||
316 | ||
317 | int OSSL_CRMF_MSG_set0_extensions(OSSL_CRMF_MSG *crm, | |
318 | X509_EXTENSIONS *exts) | |
319 | { | |
320 | OSSL_CRMF_CERTTEMPLATE *tmpl = OSSL_CRMF_MSG_get0_tmpl(crm); | |
321 | ||
322 | if (tmpl == NULL) { /* also crm == NULL implies this */ | |
323 | CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET0_EXTENSIONS, CRMF_R_NULL_ARGUMENT); | |
324 | return 0; | |
325 | } | |
326 | ||
327 | if (sk_X509_EXTENSION_num(exts) == 0) { | |
328 | sk_X509_EXTENSION_free(exts); | |
329 | exts = NULL; /* do not include empty extensions list */ | |
330 | } | |
331 | ||
332 | sk_X509_EXTENSION_pop_free(tmpl->extensions, X509_EXTENSION_free); | |
333 | tmpl->extensions = exts; | |
334 | return 1; | |
335 | } | |
336 | ||
337 | ||
338 | int OSSL_CRMF_MSG_push0_extension(OSSL_CRMF_MSG *crm, | |
7960dbec | 339 | X509_EXTENSION *ext) |
a61b7f2f DO |
340 | { |
341 | int new = 0; | |
342 | OSSL_CRMF_CERTTEMPLATE *tmpl = OSSL_CRMF_MSG_get0_tmpl(crm); | |
343 | ||
344 | if (tmpl == NULL || ext == NULL) { /* also crm == NULL implies this */ | |
345 | CRMFerr(CRMF_F_OSSL_CRMF_MSG_PUSH0_EXTENSION, CRMF_R_NULL_ARGUMENT); | |
346 | return 0; | |
347 | } | |
348 | ||
349 | if (tmpl->extensions == NULL) { | |
350 | if ((tmpl->extensions = sk_X509_EXTENSION_new_null()) == NULL) | |
7960dbec | 351 | goto err; |
a61b7f2f DO |
352 | new = 1; |
353 | } | |
354 | ||
7960dbec DDO |
355 | if (!sk_X509_EXTENSION_push(tmpl->extensions, ext)) |
356 | goto err; | |
a61b7f2f | 357 | return 1; |
7960dbec | 358 | err: |
a61b7f2f DO |
359 | if (new != 0) { |
360 | sk_X509_EXTENSION_free(tmpl->extensions); | |
361 | tmpl->extensions = NULL; | |
362 | } | |
363 | return 0; | |
364 | } | |
365 | ||
366 | /* TODO: support cases 1+2 (besides case 3) defined in RFC 4211, section 4.1. */ | |
367 | static int CRMF_poposigningkey_init(OSSL_CRMF_POPOSIGNINGKEY *ps, | |
368 | OSSL_CRMF_CERTREQUEST *cr, | |
369 | EVP_PKEY *pkey, int dgst) | |
370 | { | |
371 | int len; | |
372 | size_t crlen; | |
373 | size_t siglen; | |
374 | unsigned char *crder = NULL, *sig = NULL; | |
375 | int alg_nid = 0; | |
376 | int md_nid = 0; | |
377 | const EVP_MD *alg = NULL; | |
378 | EVP_MD_CTX *ctx = NULL; | |
379 | int ret = 0; | |
380 | ||
381 | if (ps == NULL || cr == NULL || pkey == NULL) { | |
382 | CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT, CRMF_R_NULL_ARGUMENT); | |
383 | return 0; | |
384 | } | |
385 | ||
386 | /* OpenSSL defaults all bit strings to be encoded as ASN.1 NamedBitList */ | |
387 | ps->signature->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); | |
388 | ps->signature->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
389 | ||
390 | len = i2d_OSSL_CRMF_CERTREQUEST(cr, &crder); | |
391 | if (len < 0 || crder == NULL) { | |
392 | CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT, CRMF_R_ERROR); | |
393 | goto err; | |
394 | } | |
395 | crlen = (size_t)len; | |
396 | ||
397 | if (!OBJ_find_sigid_by_algs(&alg_nid, dgst, EVP_PKEY_id(pkey))) { | |
398 | CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT, | |
399 | CRMF_R_UNSUPPORTED_ALG_FOR_POPSIGNINGKEY); | |
400 | goto err; | |
401 | } | |
402 | if (!OBJ_find_sigid_algs(alg_nid, &md_nid, NULL) | |
403 | || (alg = EVP_get_digestbynid(md_nid)) == NULL) { | |
404 | CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT, | |
405 | CRMF_R_UNSUPPORTED_ALG_FOR_POPSIGNINGKEY); | |
406 | goto err; | |
407 | } | |
408 | if (!X509_ALGOR_set0(ps->algorithmIdentifier, OBJ_nid2obj(alg_nid), | |
409 | V_ASN1_NULL, NULL) | |
410 | || (ctx = EVP_MD_CTX_new()) == NULL | |
411 | || EVP_DigestSignInit(ctx, NULL, alg, NULL, pkey) <= 0 | |
412 | || EVP_DigestSignUpdate(ctx, crder, crlen) <= 0 | |
413 | || EVP_DigestSignFinal(ctx, NULL, &siglen) <= 0) { | |
414 | CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT, CRMF_R_ERROR); | |
415 | goto err; | |
416 | } | |
7960dbec | 417 | if ((sig = OPENSSL_malloc(siglen)) == NULL) |
a61b7f2f | 418 | goto err; |
a61b7f2f DO |
419 | if (EVP_DigestSignFinal(ctx, sig, &siglen) <= 0 |
420 | || !ASN1_BIT_STRING_set(ps->signature, sig, siglen)) { | |
421 | CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT, CRMF_R_ERROR); | |
422 | goto err; | |
423 | } | |
424 | ret = 1; | |
425 | ||
426 | err: | |
427 | OPENSSL_free(crder); | |
428 | EVP_MD_CTX_free(ctx); | |
429 | OPENSSL_free(sig); | |
430 | return ret; | |
431 | } | |
432 | ||
433 | ||
434 | int OSSL_CRMF_MSG_create_popo(OSSL_CRMF_MSG *crm, EVP_PKEY *pkey, | |
435 | int dgst, int ppmtd) | |
436 | { | |
437 | OSSL_CRMF_POPO *pp = NULL; | |
438 | ASN1_INTEGER *tag = NULL; | |
439 | ||
440 | if (crm == NULL || (ppmtd == OSSL_CRMF_POPO_SIGNATURE && pkey == NULL)) { | |
441 | CRMFerr(CRMF_F_OSSL_CRMF_MSG_CREATE_POPO, CRMF_R_NULL_ARGUMENT); | |
442 | return 0; | |
443 | } | |
444 | ||
445 | if (ppmtd == OSSL_CRMF_POPO_NONE) | |
446 | goto end; | |
447 | if ((pp = OSSL_CRMF_POPO_new()) == NULL) | |
7960dbec | 448 | goto err; |
a61b7f2f DO |
449 | pp->type = ppmtd; |
450 | ||
451 | switch (ppmtd) { | |
452 | case OSSL_CRMF_POPO_RAVERIFIED: | |
453 | if ((pp->value.raVerified = ASN1_NULL_new()) == NULL) | |
7960dbec | 454 | goto err; |
a61b7f2f DO |
455 | break; |
456 | ||
457 | case OSSL_CRMF_POPO_SIGNATURE: | |
458 | { | |
459 | OSSL_CRMF_POPOSIGNINGKEY *ps = OSSL_CRMF_POPOSIGNINGKEY_new(); | |
460 | if (ps == NULL | |
461 | || !CRMF_poposigningkey_init(ps, crm->certReq, pkey, dgst)){ | |
462 | OSSL_CRMF_POPOSIGNINGKEY_free(ps); | |
463 | goto err; | |
464 | } | |
465 | pp->value.signature = ps; | |
466 | } | |
467 | break; | |
468 | ||
469 | case OSSL_CRMF_POPO_KEYENC: | |
470 | if ((pp->value.keyEncipherment = OSSL_CRMF_POPOPRIVKEY_new()) == NULL) | |
7960dbec | 471 | goto err; |
a61b7f2f DO |
472 | tag = ASN1_INTEGER_new(); |
473 | pp->value.keyEncipherment->type = | |
474 | OSSL_CRMF_POPOPRIVKEY_SUBSEQUENTMESSAGE; | |
475 | pp->value.keyEncipherment->value.subsequentMessage = tag; | |
476 | if (tag == NULL | |
477 | || !ASN1_INTEGER_set(tag, OSSL_CRMF_SUBSEQUENTMESSAGE_ENCRCERT)) | |
7960dbec | 478 | goto err; |
a61b7f2f DO |
479 | break; |
480 | ||
481 | default: | |
482 | CRMFerr(CRMF_F_OSSL_CRMF_MSG_CREATE_POPO, | |
483 | CRMF_R_UNSUPPORTED_METHOD_FOR_CREATING_POPO); | |
484 | goto err; | |
485 | } | |
486 | ||
487 | end: | |
488 | OSSL_CRMF_POPO_free(crm->popo); | |
489 | crm->popo = pp; | |
490 | ||
491 | return 1; | |
a61b7f2f DO |
492 | err: |
493 | OSSL_CRMF_POPO_free(pp); | |
494 | return 0; | |
495 | } | |
496 | ||
497 | /* returns 0 for equal, -1 for a < b or error on a, 1 for a > b or error on b */ | |
498 | static int X509_PUBKEY_cmp(X509_PUBKEY *a, X509_PUBKEY *b) | |
499 | { | |
500 | X509_ALGOR *algA = NULL, *algB = NULL; | |
501 | int res = 0; | |
502 | ||
503 | if (a == b) | |
504 | return 0; | |
505 | if (a == NULL || !X509_PUBKEY_get0_param(NULL, NULL, NULL, &algA, a) | |
506 | || algA == NULL) | |
507 | return -1; | |
508 | if (b == NULL || !X509_PUBKEY_get0_param(NULL, NULL, NULL, &algB, b) | |
509 | || algB == NULL) | |
510 | return 1; | |
511 | if ((res = X509_ALGOR_cmp(algA, algB)) != 0) | |
512 | return res; | |
513 | return EVP_PKEY_cmp(X509_PUBKEY_get0(a), X509_PUBKEY_get0(b)); | |
514 | } | |
515 | ||
516 | /* verifies the Proof-of-Possession of the request with the given rid in reqs */ | |
517 | int OSSL_CRMF_MSGS_verify_popo(const OSSL_CRMF_MSGS *reqs, | |
518 | int rid, int acceptRAVerified) | |
519 | { | |
520 | OSSL_CRMF_MSG *req = NULL; | |
521 | X509_PUBKEY *pubkey = NULL; | |
522 | OSSL_CRMF_POPOSIGNINGKEY *sig = NULL; | |
523 | ||
524 | if (reqs == NULL | |
525 | || (req = sk_OSSL_CRMF_MSG_value(reqs, rid)) == NULL | |
526 | || req->popo == NULL) { | |
527 | CRMFerr(CRMF_F_OSSL_CRMF_MSGS_VERIFY_POPO, | |
528 | CRMF_R_NULL_ARGUMENT); | |
529 | return 0; | |
530 | } | |
531 | ||
532 | switch (req->popo->type) { | |
533 | case OSSL_CRMF_POPO_RAVERIFIED: | |
534 | if (acceptRAVerified) | |
535 | return 1; | |
536 | break; | |
537 | case OSSL_CRMF_POPO_SIGNATURE: | |
538 | pubkey = req->certReq->certTemplate->publicKey; | |
539 | sig = req->popo->value.signature; | |
540 | if (sig->poposkInput != NULL) { | |
541 | /* | |
542 | * According to RFC 4211: publicKey contains a copy of | |
543 | * the public key from the certificate template. This MUST be | |
544 | * exactly the same value as contained in the certificate template. | |
545 | */ | |
546 | if (pubkey == NULL | |
547 | || sig->poposkInput->publicKey == NULL | |
548 | || X509_PUBKEY_cmp(pubkey, sig->poposkInput->publicKey) | |
549 | || ASN1_item_verify( | |
550 | ASN1_ITEM_rptr(OSSL_CRMF_POPOSIGNINGKEYINPUT), | |
551 | sig->algorithmIdentifier, sig->signature, | |
552 | sig->poposkInput, X509_PUBKEY_get0(pubkey)) < 1) | |
553 | break; | |
554 | } else { | |
555 | if (pubkey == NULL | |
556 | || req->certReq->certTemplate->subject == NULL | |
557 | || ASN1_item_verify(ASN1_ITEM_rptr(OSSL_CRMF_CERTREQUEST), | |
558 | sig->algorithmIdentifier, sig->signature, | |
559 | req->certReq, | |
560 | X509_PUBKEY_get0(pubkey)) < 1) | |
561 | break; | |
562 | } | |
563 | return 1; | |
564 | case OSSL_CRMF_POPO_KEYENC: | |
565 | /* | |
566 | * TODO: when OSSL_CMP_certrep_new() supports encrypted certs, | |
567 | * return 1 if the type of req->popo->value.keyEncipherment | |
568 | * is OSSL_CRMF_POPOPRIVKEY_SUBSEQUENTMESSAGE and | |
569 | * its value.subsequentMessage == OSSL_CRMF_SUBSEQUENTMESSAGE_ENCRCERT | |
570 | */ | |
571 | case OSSL_CRMF_POPO_KEYAGREE: | |
572 | default: | |
573 | CRMFerr(CRMF_F_OSSL_CRMF_MSGS_VERIFY_POPO, | |
574 | CRMF_R_UNSUPPORTED_POPO_METHOD); | |
575 | return 0; | |
576 | } | |
577 | CRMFerr(CRMF_F_OSSL_CRMF_MSGS_VERIFY_POPO, | |
578 | CRMF_R_UNSUPPORTED_POPO_NOT_ACCEPTED); | |
579 | return 0; | |
580 | } | |
581 | ||
582 | /* retrieves the serialNumber of the given cert template or NULL on error */ | |
583 | ASN1_INTEGER *OSSL_CRMF_CERTTEMPLATE_get0_serialNumber(OSSL_CRMF_CERTTEMPLATE *tmpl) | |
584 | { | |
585 | return tmpl != NULL ? tmpl->serialNumber : NULL; | |
586 | } | |
587 | ||
588 | /* retrieves the issuer name of the given cert template or NULL on error */ | |
589 | X509_NAME *OSSL_CRMF_CERTTEMPLATE_get0_issuer(OSSL_CRMF_CERTTEMPLATE *tmpl) | |
590 | { | |
591 | return tmpl != NULL ? tmpl->issuer : NULL; | |
592 | } | |
593 | ||
7960dbec DDO |
594 | /* retrieves the issuer name of the given CertId or NULL on error */ |
595 | X509_NAME *OSSL_CRMF_CERTID_get0_issuer(const OSSL_CRMF_CERTID *cid) | |
596 | { | |
597 | return cid != NULL && cid->issuer->type == GEN_DIRNAME ? | |
598 | cid->issuer->d.directoryName : NULL; | |
599 | } | |
600 | ||
601 | /* retrieves the serialNumber of the given CertId or NULL on error */ | |
602 | ASN1_INTEGER *OSSL_CRMF_CERTID_get0_serialNumber(const OSSL_CRMF_CERTID *cid) | |
603 | { | |
604 | return cid != NULL ? cid->serialNumber : NULL; | |
605 | } | |
606 | ||
607 | /*- | |
a61b7f2f DO |
608 | * fill in certificate template. |
609 | * Any value argument that is NULL will leave the respective field unchanged. | |
610 | */ | |
611 | int OSSL_CRMF_CERTTEMPLATE_fill(OSSL_CRMF_CERTTEMPLATE *tmpl, | |
612 | EVP_PKEY *pubkey, | |
613 | const X509_NAME *subject, | |
614 | const X509_NAME *issuer, | |
615 | const ASN1_INTEGER *serial) | |
616 | { | |
617 | if (tmpl == NULL) { | |
618 | CRMFerr(CRMF_F_OSSL_CRMF_CERTTEMPLATE_FILL, CRMF_R_NULL_ARGUMENT); | |
619 | return 0; | |
620 | } | |
621 | if (subject != NULL && !X509_NAME_set(&tmpl->subject, subject)) | |
7960dbec | 622 | return 0; |
a61b7f2f | 623 | if (issuer != NULL && !X509_NAME_set(&tmpl->issuer, issuer)) |
7960dbec | 624 | return 0; |
a61b7f2f DO |
625 | if (serial != NULL) { |
626 | ASN1_INTEGER_free(tmpl->serialNumber); | |
627 | if ((tmpl->serialNumber = ASN1_INTEGER_dup(serial)) == NULL) | |
7960dbec | 628 | return 0; |
a61b7f2f DO |
629 | } |
630 | if (pubkey != NULL && !X509_PUBKEY_set(&tmpl->publicKey, pubkey)) | |
7960dbec | 631 | return 0; |
a61b7f2f | 632 | return 1; |
a61b7f2f DO |
633 | } |
634 | ||
635 | ||
636 | /*- | |
7960dbec DDO |
637 | * Decrypts the certificate in the given encryptedValue using private key pkey. |
638 | * This is needed for the indirect PoP method as in RFC 4210 section 5.2.8.2. | |
a61b7f2f DO |
639 | * |
640 | * returns a pointer to the decrypted certificate | |
641 | * returns NULL on error or if no certificate available | |
642 | */ | |
643 | X509 *OSSL_CRMF_ENCRYPTEDVALUE_get1_encCert(OSSL_CRMF_ENCRYPTEDVALUE *ecert, | |
644 | EVP_PKEY *pkey) | |
645 | { | |
646 | X509 *cert = NULL; /* decrypted certificate */ | |
647 | EVP_CIPHER_CTX *evp_ctx = NULL; /* context for symmetric encryption */ | |
648 | unsigned char *ek = NULL; /* decrypted symmetric encryption key */ | |
f3f3318a | 649 | size_t eksize = 0; /* size of decrypted symmetric encryption key */ |
a61b7f2f | 650 | const EVP_CIPHER *cipher = NULL; /* used cipher */ |
f3f3318a | 651 | int cikeysize = 0; /* key size from cipher */ |
a61b7f2f DO |
652 | unsigned char *iv = NULL; /* initial vector for symmetric encryption */ |
653 | unsigned char *outbuf = NULL; /* decryption output buffer */ | |
654 | const unsigned char *p = NULL; /* needed for decoding ASN1 */ | |
655 | int symmAlg = 0; /* NIDs for symmetric algorithm */ | |
656 | int n, outlen = 0; | |
657 | EVP_PKEY_CTX *pkctx = NULL; /* private key context */ | |
658 | ||
659 | if (ecert == NULL || ecert->symmAlg == NULL || ecert->encSymmKey == NULL | |
660 | || ecert->encValue == NULL || pkey == NULL) { | |
661 | CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT, | |
662 | CRMF_R_NULL_ARGUMENT); | |
663 | return NULL; | |
664 | } | |
665 | if ((symmAlg = OBJ_obj2nid(ecert->symmAlg->algorithm)) == 0) { | |
666 | CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT, | |
667 | CRMF_R_UNSUPPORTED_CIPHER); | |
668 | return NULL; | |
669 | } | |
f3f3318a AK |
670 | /* select symmetric cipher based on algorithm given in message */ |
671 | if ((cipher = EVP_get_cipherbynid(symmAlg)) == NULL) { | |
672 | CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT, | |
673 | CRMF_R_UNSUPPORTED_CIPHER); | |
674 | goto end; | |
675 | } | |
676 | cikeysize = EVP_CIPHER_key_length(cipher); | |
a61b7f2f DO |
677 | /* first the symmetric key needs to be decrypted */ |
678 | pkctx = EVP_PKEY_CTX_new(pkey, NULL); | |
679 | if (pkctx != NULL && EVP_PKEY_decrypt_init(pkctx)) { | |
680 | ASN1_BIT_STRING *encKey = ecert->encSymmKey; | |
f3f3318a AK |
681 | size_t failure; |
682 | int retval; | |
a61b7f2f | 683 | |
f3f3318a AK |
684 | if (EVP_PKEY_decrypt(pkctx, NULL, &eksize, |
685 | encKey->data, encKey->length) <= 0 | |
686 | || (ek = OPENSSL_malloc(eksize)) == NULL) | |
7960dbec | 687 | goto end; |
f3f3318a AK |
688 | retval = EVP_PKEY_decrypt(pkctx, ek, &eksize, |
689 | encKey->data, encKey->length); | |
690 | ERR_clear_error(); /* error state may have sensitive information */ | |
691 | failure = ~constant_time_is_zero_s(constant_time_msb(retval) | |
692 | | constant_time_is_zero(retval)); | |
693 | failure |= ~constant_time_eq_s(eksize, (size_t)cikeysize); | |
694 | if (failure) { | |
a61b7f2f DO |
695 | CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT, |
696 | CRMF_R_ERROR_DECRYPTING_SYMMETRIC_KEY); | |
697 | goto end; | |
698 | } | |
699 | } else { | |
7960dbec | 700 | goto end; |
a61b7f2f | 701 | } |
a61b7f2f | 702 | if ((iv = OPENSSL_malloc(EVP_CIPHER_iv_length(cipher))) == NULL) |
7960dbec | 703 | goto end; |
a61b7f2f DO |
704 | if (ASN1_TYPE_get_octetstring(ecert->symmAlg->parameter, iv, |
705 | EVP_CIPHER_iv_length(cipher)) | |
706 | != EVP_CIPHER_iv_length(cipher)) { | |
707 | CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT, | |
708 | CRMF_R_MALFORMED_IV); | |
709 | goto end; | |
710 | } | |
711 | ||
712 | /* | |
713 | * d2i_X509 changes the given pointer, so use p for decoding the message and | |
714 | * keep the original pointer in outbuf so the memory can be freed later | |
715 | */ | |
716 | if ((p = outbuf = OPENSSL_malloc(ecert->encValue->length + | |
717 | EVP_CIPHER_block_size(cipher))) == NULL | |
718 | || (evp_ctx = EVP_CIPHER_CTX_new()) == NULL) | |
7960dbec | 719 | goto end; |
a61b7f2f DO |
720 | EVP_CIPHER_CTX_set_padding(evp_ctx, 0); |
721 | ||
722 | if (!EVP_DecryptInit(evp_ctx, cipher, ek, iv) | |
723 | || !EVP_DecryptUpdate(evp_ctx, outbuf, &outlen, | |
724 | ecert->encValue->data, | |
725 | ecert->encValue->length) | |
726 | || !EVP_DecryptFinal(evp_ctx, outbuf + outlen, &n)) { | |
727 | CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT, | |
728 | CRMF_R_ERROR_DECRYPTING_CERTIFICATE); | |
729 | goto end; | |
730 | } | |
731 | outlen += n; | |
732 | ||
733 | /* convert decrypted certificate from DER to internal ASN.1 structure */ | |
734 | if ((cert = d2i_X509(NULL, &p, outlen)) == NULL) { | |
735 | CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT, | |
736 | CRMF_R_ERROR_DECODING_CERTIFICATE); | |
737 | } | |
a61b7f2f DO |
738 | end: |
739 | EVP_PKEY_CTX_free(pkctx); | |
740 | OPENSSL_free(outbuf); | |
741 | EVP_CIPHER_CTX_free(evp_ctx); | |
f3f3318a | 742 | OPENSSL_clear_free(ek, eksize); |
a61b7f2f DO |
743 | OPENSSL_free(iv); |
744 | return cert; | |
745 | } |