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62dcd2aa | 1 | /* |
4333b89f | 2 | * Copyright 2007-2021 The OpenSSL Project Authors. All Rights Reserved. |
62dcd2aa DDO |
3 | * Copyright Nokia 2007-2019 |
4 | * Copyright Siemens AG 2015-2019 | |
5 | * | |
6 | * Licensed under the Apache License 2.0 (the "License"). You may not use | |
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 | ||
12 | /* general CMP server functions */ | |
13 | ||
14 | #include <openssl/asn1t.h> | |
15 | ||
16 | #include "cmp_local.h" | |
17 | ||
18 | /* explicit #includes not strictly needed since implied by the above: */ | |
19 | #include <openssl/cmp.h> | |
20 | #include <openssl/err.h> | |
21 | ||
22 | /* the context for the generic CMP server */ | |
23 | struct ossl_cmp_srv_ctx_st | |
24 | { | |
25 | OSSL_CMP_CTX *ctx; /* Client CMP context, partly reused for srv */ | |
26 | void *custom_ctx; /* pointer to specific server context */ | |
27 | ||
28 | OSSL_CMP_SRV_cert_request_cb_t process_cert_request; | |
29 | OSSL_CMP_SRV_rr_cb_t process_rr; | |
30 | OSSL_CMP_SRV_genm_cb_t process_genm; | |
31 | OSSL_CMP_SRV_error_cb_t process_error; | |
32 | OSSL_CMP_SRV_certConf_cb_t process_certConf; | |
33 | OSSL_CMP_SRV_pollReq_cb_t process_pollReq; | |
34 | ||
35 | int sendUnprotectedErrors; /* Send error and rejection msgs unprotected */ | |
36 | int acceptUnprotected; /* Accept requests with no/invalid prot. */ | |
37 | int acceptRAVerified; /* Accept ir/cr/kur with POPO RAVerified */ | |
38 | int grantImplicitConfirm; /* Grant implicit confirmation if requested */ | |
39 | ||
40 | }; /* OSSL_CMP_SRV_CTX */ | |
41 | ||
42 | void OSSL_CMP_SRV_CTX_free(OSSL_CMP_SRV_CTX *srv_ctx) | |
43 | { | |
44 | if (srv_ctx == NULL) | |
45 | return; | |
46 | ||
47 | OSSL_CMP_CTX_free(srv_ctx->ctx); | |
48 | OPENSSL_free(srv_ctx); | |
49 | } | |
50 | ||
b4250010 | 51 | OSSL_CMP_SRV_CTX *OSSL_CMP_SRV_CTX_new(OSSL_LIB_CTX *libctx, const char *propq) |
62dcd2aa DDO |
52 | { |
53 | OSSL_CMP_SRV_CTX *ctx = OPENSSL_zalloc(sizeof(OSSL_CMP_SRV_CTX)); | |
54 | ||
55 | if (ctx == NULL) | |
56 | goto err; | |
57 | ||
1a7cd250 | 58 | if ((ctx->ctx = OSSL_CMP_CTX_new(libctx, propq)) == NULL) |
62dcd2aa DDO |
59 | goto err; |
60 | ||
61 | /* all other elements are initialized to 0 or NULL, respectively */ | |
62 | return ctx; | |
63 | err: | |
64 | OSSL_CMP_SRV_CTX_free(ctx); | |
65 | return NULL; | |
66 | } | |
67 | ||
68 | int OSSL_CMP_SRV_CTX_init(OSSL_CMP_SRV_CTX *srv_ctx, void *custom_ctx, | |
69 | OSSL_CMP_SRV_cert_request_cb_t process_cert_request, | |
70 | OSSL_CMP_SRV_rr_cb_t process_rr, | |
71 | OSSL_CMP_SRV_genm_cb_t process_genm, | |
72 | OSSL_CMP_SRV_error_cb_t process_error, | |
73 | OSSL_CMP_SRV_certConf_cb_t process_certConf, | |
74 | OSSL_CMP_SRV_pollReq_cb_t process_pollReq) | |
75 | { | |
76 | if (srv_ctx == NULL) { | |
9311d0c4 | 77 | ERR_raise(ERR_LIB_CMP, CMP_R_NULL_ARGUMENT); |
62dcd2aa DDO |
78 | return 0; |
79 | } | |
80 | srv_ctx->custom_ctx = custom_ctx; | |
81 | srv_ctx->process_cert_request = process_cert_request; | |
82 | srv_ctx->process_rr = process_rr; | |
83 | srv_ctx->process_genm = process_genm; | |
84 | srv_ctx->process_error = process_error; | |
85 | srv_ctx->process_certConf = process_certConf; | |
86 | srv_ctx->process_pollReq = process_pollReq; | |
87 | return 1; | |
88 | } | |
89 | ||
90 | OSSL_CMP_CTX *OSSL_CMP_SRV_CTX_get0_cmp_ctx(const OSSL_CMP_SRV_CTX *srv_ctx) | |
91 | { | |
92 | if (srv_ctx == NULL) { | |
9311d0c4 | 93 | ERR_raise(ERR_LIB_CMP, CMP_R_NULL_ARGUMENT); |
62dcd2aa DDO |
94 | return NULL; |
95 | } | |
96 | return srv_ctx->ctx; | |
97 | } | |
98 | ||
99 | void *OSSL_CMP_SRV_CTX_get0_custom_ctx(const OSSL_CMP_SRV_CTX *srv_ctx) | |
100 | { | |
101 | if (srv_ctx == NULL) { | |
9311d0c4 | 102 | ERR_raise(ERR_LIB_CMP, CMP_R_NULL_ARGUMENT); |
62dcd2aa DDO |
103 | return NULL; |
104 | } | |
105 | return srv_ctx->custom_ctx; | |
106 | } | |
107 | ||
108 | int OSSL_CMP_SRV_CTX_set_send_unprotected_errors(OSSL_CMP_SRV_CTX *srv_ctx, | |
109 | int val) | |
110 | { | |
111 | if (srv_ctx == NULL) { | |
9311d0c4 | 112 | ERR_raise(ERR_LIB_CMP, CMP_R_NULL_ARGUMENT); |
62dcd2aa DDO |
113 | return 0; |
114 | } | |
115 | srv_ctx->sendUnprotectedErrors = val != 0; | |
116 | return 1; | |
117 | } | |
118 | ||
119 | int OSSL_CMP_SRV_CTX_set_accept_unprotected(OSSL_CMP_SRV_CTX *srv_ctx, int val) | |
120 | { | |
121 | if (srv_ctx == NULL) { | |
9311d0c4 | 122 | ERR_raise(ERR_LIB_CMP, CMP_R_NULL_ARGUMENT); |
62dcd2aa DDO |
123 | return 0; |
124 | } | |
125 | srv_ctx->acceptUnprotected = val != 0; | |
126 | return 1; | |
127 | } | |
128 | ||
129 | int OSSL_CMP_SRV_CTX_set_accept_raverified(OSSL_CMP_SRV_CTX *srv_ctx, int val) | |
130 | { | |
131 | if (srv_ctx == NULL) { | |
9311d0c4 | 132 | ERR_raise(ERR_LIB_CMP, CMP_R_NULL_ARGUMENT); |
62dcd2aa DDO |
133 | return 0; |
134 | } | |
135 | srv_ctx->acceptRAVerified = val != 0; | |
136 | return 1; | |
137 | } | |
138 | ||
139 | int OSSL_CMP_SRV_CTX_set_grant_implicit_confirm(OSSL_CMP_SRV_CTX *srv_ctx, | |
140 | int val) | |
141 | { | |
142 | if (srv_ctx == NULL) { | |
9311d0c4 | 143 | ERR_raise(ERR_LIB_CMP, CMP_R_NULL_ARGUMENT); |
62dcd2aa DDO |
144 | return 0; |
145 | } | |
146 | srv_ctx->grantImplicitConfirm = val != 0; | |
147 | return 1; | |
148 | } | |
149 | ||
150 | /* | |
151 | * Processes an ir/cr/p10cr/kur and returns a certification response. | |
152 | * Only handles the first certification request contained in req | |
153 | * returns an ip/cp/kup on success and NULL on error | |
154 | */ | |
155 | static OSSL_CMP_MSG *process_cert_request(OSSL_CMP_SRV_CTX *srv_ctx, | |
156 | const OSSL_CMP_MSG *req) | |
157 | { | |
158 | OSSL_CMP_MSG *msg = NULL; | |
159 | OSSL_CMP_PKISI *si = NULL; | |
160 | X509 *certOut = NULL; | |
161 | STACK_OF(X509) *chainOut = NULL, *caPubs = NULL; | |
162 | const OSSL_CRMF_MSG *crm = NULL; | |
163 | const X509_REQ *p10cr = NULL; | |
164 | int bodytype; | |
165 | int certReqId; | |
166 | ||
167 | if (!ossl_assert(srv_ctx != NULL && srv_ctx->ctx != NULL && req != NULL)) | |
168 | return NULL; | |
169 | ||
7df56ada | 170 | switch (OSSL_CMP_MSG_get_bodytype(req)) { |
62dcd2aa DDO |
171 | case OSSL_CMP_PKIBODY_P10CR: |
172 | case OSSL_CMP_PKIBODY_CR: | |
173 | bodytype = OSSL_CMP_PKIBODY_CP; | |
174 | break; | |
175 | case OSSL_CMP_PKIBODY_IR: | |
176 | bodytype = OSSL_CMP_PKIBODY_IP; | |
177 | break; | |
178 | case OSSL_CMP_PKIBODY_KUR: | |
179 | bodytype = OSSL_CMP_PKIBODY_KUP; | |
180 | break; | |
181 | default: | |
9311d0c4 | 182 | ERR_raise(ERR_LIB_CMP, CMP_R_UNEXPECTED_PKIBODY); |
62dcd2aa DDO |
183 | return NULL; |
184 | } | |
185 | ||
7df56ada | 186 | if (OSSL_CMP_MSG_get_bodytype(req) == OSSL_CMP_PKIBODY_P10CR) { |
62dcd2aa DDO |
187 | certReqId = OSSL_CMP_CERTREQID; |
188 | p10cr = req->body->value.p10cr; | |
189 | } else { | |
190 | OSSL_CRMF_MSGS *reqs = req->body->value.ir; /* same for cr and kur */ | |
191 | ||
75e1191f | 192 | if (sk_OSSL_CRMF_MSG_num(reqs) != 1) { |
9311d0c4 | 193 | ERR_raise(ERR_LIB_CMP, CMP_R_MULTIPLE_REQUESTS_NOT_SUPPORTED); |
62dcd2aa DDO |
194 | return NULL; |
195 | } | |
196 | ||
197 | if ((crm = sk_OSSL_CRMF_MSG_value(reqs, OSSL_CMP_CERTREQID)) == NULL) { | |
9311d0c4 | 198 | ERR_raise(ERR_LIB_CMP, CMP_R_CERTREQMSG_NOT_FOUND); |
62dcd2aa DDO |
199 | return NULL; |
200 | } | |
201 | certReqId = OSSL_CRMF_MSG_get_certReqId(crm); | |
202 | } | |
203 | ||
6d1f50b5 | 204 | if (!ossl_cmp_verify_popo(srv_ctx->ctx, req, srv_ctx->acceptRAVerified)) { |
62dcd2aa DDO |
205 | /* Proof of possession could not be verified */ |
206 | si = OSSL_CMP_STATUSINFO_new(OSSL_CMP_PKISTATUS_rejection, | |
207 | 1 << OSSL_CMP_PKIFAILUREINFO_badPOP, | |
208 | ERR_reason_error_string(ERR_peek_error())); | |
209 | if (si == NULL) | |
210 | return NULL; | |
211 | } else { | |
212 | OSSL_CMP_PKIHEADER *hdr = OSSL_CMP_MSG_get0_header(req); | |
213 | ||
214 | si = srv_ctx->process_cert_request(srv_ctx, req, certReqId, crm, p10cr, | |
215 | &certOut, &chainOut, &caPubs); | |
216 | if (si == NULL) | |
217 | goto err; | |
7e765f46 | 218 | /* set OSSL_CMP_OPT_IMPLICIT_CONFIRM if and only if transaction ends */ |
143be474 DDO |
219 | if (!OSSL_CMP_CTX_set_option(srv_ctx->ctx, |
220 | OSSL_CMP_OPT_IMPLICIT_CONFIRM, | |
62dcd2aa DDO |
221 | ossl_cmp_hdr_has_implicitConfirm(hdr) |
222 | && srv_ctx->grantImplicitConfirm | |
223 | /* do not set if polling starts: */ | |
224 | && certOut != NULL)) | |
225 | goto err; | |
226 | } | |
227 | ||
299e0f1e | 228 | msg = ossl_cmp_certrep_new(srv_ctx->ctx, bodytype, certReqId, si, |
7b3990e3 | 229 | certOut, NULL /* enc */, chainOut, caPubs, |
62dcd2aa | 230 | srv_ctx->sendUnprotectedErrors); |
62dcd2aa | 231 | if (msg == NULL) |
9311d0c4 | 232 | ERR_raise(ERR_LIB_CMP, CMP_R_ERROR_CREATING_CERTREP); |
62dcd2aa DDO |
233 | |
234 | err: | |
235 | OSSL_CMP_PKISI_free(si); | |
236 | X509_free(certOut); | |
237 | sk_X509_pop_free(chainOut, X509_free); | |
238 | sk_X509_pop_free(caPubs, X509_free); | |
239 | return msg; | |
240 | } | |
241 | ||
242 | static OSSL_CMP_MSG *process_rr(OSSL_CMP_SRV_CTX *srv_ctx, | |
243 | const OSSL_CMP_MSG *req) | |
244 | { | |
245 | OSSL_CMP_MSG *msg = NULL; | |
246 | OSSL_CMP_REVDETAILS *details; | |
3d46c81a | 247 | OSSL_CRMF_CERTID *certId = NULL; |
62dcd2aa | 248 | OSSL_CRMF_CERTTEMPLATE *tmpl; |
8cc86b81 | 249 | const X509_NAME *issuer; |
62dcd2aa DDO |
250 | ASN1_INTEGER *serial; |
251 | OSSL_CMP_PKISI *si; | |
252 | ||
253 | if (!ossl_assert(srv_ctx != NULL && srv_ctx->ctx != NULL && req != NULL)) | |
254 | return NULL; | |
255 | ||
256 | if (sk_OSSL_CMP_REVDETAILS_num(req->body->value.rr) != 1) { | |
9311d0c4 | 257 | ERR_raise(ERR_LIB_CMP, CMP_R_MULTIPLE_REQUESTS_NOT_SUPPORTED); |
62dcd2aa DDO |
258 | return NULL; |
259 | } | |
260 | ||
261 | if ((details = sk_OSSL_CMP_REVDETAILS_value(req->body->value.rr, | |
262 | OSSL_CMP_REVREQSID)) == NULL) { | |
9311d0c4 | 263 | ERR_raise(ERR_LIB_CMP, CMP_R_ERROR_PROCESSING_MESSAGE); |
62dcd2aa DDO |
264 | return NULL; |
265 | } | |
266 | ||
267 | tmpl = details->certDetails; | |
268 | issuer = OSSL_CRMF_CERTTEMPLATE_get0_issuer(tmpl); | |
269 | serial = OSSL_CRMF_CERTTEMPLATE_get0_serialNumber(tmpl); | |
3d46c81a DDO |
270 | if (issuer != NULL && serial != NULL |
271 | && (certId = OSSL_CRMF_CERTID_gen(issuer, serial)) == NULL) | |
62dcd2aa DDO |
272 | return NULL; |
273 | if ((si = srv_ctx->process_rr(srv_ctx, req, issuer, serial)) == NULL) | |
274 | goto err; | |
275 | ||
276 | if ((msg = ossl_cmp_rp_new(srv_ctx->ctx, si, certId, | |
277 | srv_ctx->sendUnprotectedErrors)) == NULL) | |
9311d0c4 | 278 | ERR_raise(ERR_LIB_CMP, CMP_R_ERROR_CREATING_RR); |
62dcd2aa DDO |
279 | |
280 | err: | |
281 | OSSL_CRMF_CERTID_free(certId); | |
282 | OSSL_CMP_PKISI_free(si); | |
283 | return msg; | |
284 | } | |
285 | ||
286 | /* | |
287 | * Processes genm and creates a genp message mirroring the contents of the | |
288 | * incoming message | |
289 | */ | |
290 | static OSSL_CMP_MSG *process_genm(OSSL_CMP_SRV_CTX *srv_ctx, | |
291 | const OSSL_CMP_MSG *req) | |
292 | { | |
293 | OSSL_CMP_GENMSGCONTENT *itavs; | |
294 | OSSL_CMP_MSG *msg; | |
295 | ||
296 | if (!ossl_assert(srv_ctx != NULL && srv_ctx->ctx != NULL && req != NULL)) | |
297 | return NULL; | |
298 | ||
299 | if (!srv_ctx->process_genm(srv_ctx, req, req->body->value.genm, &itavs)) | |
300 | return NULL; | |
301 | ||
302 | msg = ossl_cmp_genp_new(srv_ctx->ctx, itavs); | |
303 | sk_OSSL_CMP_ITAV_pop_free(itavs, OSSL_CMP_ITAV_free); | |
304 | return msg; | |
305 | } | |
306 | ||
307 | static OSSL_CMP_MSG *process_error(OSSL_CMP_SRV_CTX *srv_ctx, | |
308 | const OSSL_CMP_MSG *req) | |
309 | { | |
310 | OSSL_CMP_ERRORMSGCONTENT *errorContent; | |
311 | OSSL_CMP_MSG *msg; | |
312 | ||
313 | if (!ossl_assert(srv_ctx != NULL && srv_ctx->ctx != NULL && req != NULL)) | |
314 | return NULL; | |
315 | errorContent = req->body->value.error; | |
316 | srv_ctx->process_error(srv_ctx, req, errorContent->pKIStatusInfo, | |
317 | errorContent->errorCode, errorContent->errorDetails); | |
318 | ||
319 | if ((msg = ossl_cmp_pkiconf_new(srv_ctx->ctx)) == NULL) | |
9311d0c4 | 320 | ERR_raise(ERR_LIB_CMP, CMP_R_ERROR_CREATING_PKICONF); |
62dcd2aa DDO |
321 | return msg; |
322 | } | |
323 | ||
324 | static OSSL_CMP_MSG *process_certConf(OSSL_CMP_SRV_CTX *srv_ctx, | |
325 | const OSSL_CMP_MSG *req) | |
326 | { | |
327 | OSSL_CMP_CTX *ctx; | |
328 | OSSL_CMP_CERTCONFIRMCONTENT *ccc; | |
329 | int num; | |
330 | OSSL_CMP_MSG *msg = NULL; | |
331 | OSSL_CMP_CERTSTATUS *status = NULL; | |
332 | ||
333 | if (!ossl_assert(srv_ctx != NULL && srv_ctx->ctx != NULL && req != NULL)) | |
334 | return NULL; | |
335 | ||
336 | ctx = srv_ctx->ctx; | |
337 | ccc = req->body->value.certConf; | |
338 | num = sk_OSSL_CMP_CERTSTATUS_num(ccc); | |
339 | ||
83c27441 DDO |
340 | if (OSSL_CMP_CTX_get_option(ctx, OSSL_CMP_OPT_IMPLICIT_CONFIRM) == 1 |
341 | || ctx->status != -2 /* transaction not open */) { | |
9311d0c4 | 342 | ERR_raise(ERR_LIB_CMP, CMP_R_ERROR_UNEXPECTED_CERTCONF); |
62dcd2aa DDO |
343 | return NULL; |
344 | } | |
345 | ||
346 | if (num == 0) { | |
347 | ossl_cmp_err(ctx, "certificate rejected by client"); | |
348 | } else { | |
349 | if (num > 1) | |
350 | ossl_cmp_warn(ctx, "All CertStatus but the first will be ignored"); | |
351 | status = sk_OSSL_CMP_CERTSTATUS_value(ccc, OSSL_CMP_CERTREQID); | |
352 | } | |
353 | ||
354 | if (status != NULL) { | |
355 | int certReqId = ossl_cmp_asn1_get_int(status->certReqId); | |
356 | ASN1_OCTET_STRING *certHash = status->certHash; | |
357 | OSSL_CMP_PKISI *si = status->statusInfo; | |
358 | ||
359 | if (!srv_ctx->process_certConf(srv_ctx, req, certReqId, certHash, si)) | |
360 | return NULL; /* reason code may be: CMP_R_CERTHASH_UNMATCHED */ | |
361 | ||
362 | if (si != NULL && ossl_cmp_pkisi_get_status(si) | |
363 | != OSSL_CMP_PKISTATUS_accepted) { | |
364 | int pki_status = ossl_cmp_pkisi_get_status(si); | |
365 | const char *str = ossl_cmp_PKIStatus_to_string(pki_status); | |
366 | ||
367 | ossl_cmp_log2(INFO, ctx, "certificate rejected by client %s %s", | |
368 | str == NULL ? "without" : "with", | |
369 | str == NULL ? "PKIStatus" : str); | |
370 | } | |
371 | } | |
372 | ||
373 | if ((msg = ossl_cmp_pkiconf_new(ctx)) == NULL) | |
9311d0c4 | 374 | ERR_raise(ERR_LIB_CMP, CMP_R_ERROR_CREATING_PKICONF); |
62dcd2aa DDO |
375 | return msg; |
376 | } | |
377 | ||
378 | static OSSL_CMP_MSG *process_pollReq(OSSL_CMP_SRV_CTX *srv_ctx, | |
379 | const OSSL_CMP_MSG *req) | |
380 | { | |
381 | OSSL_CMP_POLLREQCONTENT *prc; | |
382 | OSSL_CMP_POLLREQ *pr; | |
383 | int certReqId; | |
384 | OSSL_CMP_MSG *certReq; | |
385 | int64_t check_after = 0; | |
386 | OSSL_CMP_MSG *msg = NULL; | |
387 | ||
388 | if (!ossl_assert(srv_ctx != NULL && srv_ctx->ctx != NULL && req != NULL)) | |
389 | return NULL; | |
390 | ||
391 | prc = req->body->value.pollReq; | |
75e1191f | 392 | if (sk_OSSL_CMP_POLLREQ_num(prc) != 1) { |
9311d0c4 | 393 | ERR_raise(ERR_LIB_CMP, CMP_R_MULTIPLE_REQUESTS_NOT_SUPPORTED); |
62dcd2aa DDO |
394 | return NULL; |
395 | } | |
396 | ||
397 | pr = sk_OSSL_CMP_POLLREQ_value(prc, 0); | |
398 | certReqId = ossl_cmp_asn1_get_int(pr->certReqId); | |
399 | if (!srv_ctx->process_pollReq(srv_ctx, req, certReqId, | |
400 | &certReq, &check_after)) | |
401 | return NULL; | |
402 | ||
403 | if (certReq != NULL) { | |
404 | msg = process_cert_request(srv_ctx, certReq); | |
405 | OSSL_CMP_MSG_free(certReq); | |
406 | } else { | |
407 | if ((msg = ossl_cmp_pollRep_new(srv_ctx->ctx, certReqId, | |
408 | check_after)) == NULL) | |
9311d0c4 | 409 | ERR_raise(ERR_LIB_CMP, CMP_R_ERROR_CREATING_POLLREP); |
62dcd2aa DDO |
410 | } |
411 | return msg; | |
412 | } | |
413 | ||
414 | /* | |
7e765f46 DDO |
415 | * Determine whether missing/invalid protection of request message is allowed. |
416 | * Return 1 on acceptance, 0 on rejection, or -1 on (internal) error. | |
62dcd2aa DDO |
417 | */ |
418 | static int unprotected_exception(const OSSL_CMP_CTX *ctx, | |
419 | const OSSL_CMP_MSG *req, | |
420 | int invalid_protection, | |
421 | int accept_unprotected_requests) | |
422 | { | |
7e765f46 DDO |
423 | if (!ossl_assert(ctx != NULL && req != NULL)) |
424 | return -1; | |
425 | ||
62dcd2aa DDO |
426 | if (accept_unprotected_requests) { |
427 | ossl_cmp_log1(WARN, ctx, "ignoring %s protection of request message", | |
428 | invalid_protection ? "invalid" : "missing"); | |
429 | return 1; | |
430 | } | |
7df56ada | 431 | if (OSSL_CMP_MSG_get_bodytype(req) == OSSL_CMP_PKIBODY_ERROR |
62dcd2aa DDO |
432 | && OSSL_CMP_CTX_get_option(ctx, OSSL_CMP_OPT_UNPROTECTED_ERRORS) == 1) { |
433 | ossl_cmp_warn(ctx, "ignoring missing protection of error message"); | |
434 | return 1; | |
435 | } | |
436 | return 0; | |
437 | } | |
438 | ||
439 | /* | |
440 | * returns created message and NULL on internal error | |
441 | */ | |
442 | OSSL_CMP_MSG *OSSL_CMP_SRV_process_request(OSSL_CMP_SRV_CTX *srv_ctx, | |
443 | const OSSL_CMP_MSG *req) | |
444 | { | |
445 | OSSL_CMP_CTX *ctx; | |
12bbcee2 | 446 | ASN1_OCTET_STRING *backup_secret; |
62dcd2aa DDO |
447 | OSSL_CMP_PKIHEADER *hdr; |
448 | int req_type, rsp_type; | |
12bbcee2 | 449 | int res; |
62dcd2aa DDO |
450 | OSSL_CMP_MSG *rsp = NULL; |
451 | ||
452 | if (srv_ctx == NULL || srv_ctx->ctx == NULL | |
453 | || req == NULL || req->body == NULL | |
454 | || (hdr = OSSL_CMP_MSG_get0_header(req)) == NULL) { | |
9311d0c4 | 455 | ERR_raise(ERR_LIB_CMP, CMP_R_NULL_ARGUMENT); |
62dcd2aa DDO |
456 | return 0; |
457 | } | |
458 | ctx = srv_ctx->ctx; | |
12bbcee2 | 459 | backup_secret = ctx->secretValue; |
62dcd2aa | 460 | |
12bbcee2 DDO |
461 | /* |
462 | * Some things need to be done already before validating the message in | |
463 | * order to be able to send an error message as far as needed and possible. | |
464 | */ | |
62dcd2aa | 465 | if (hdr->sender->type != GEN_DIRNAME) { |
9311d0c4 | 466 | ERR_raise(ERR_LIB_CMP, CMP_R_SENDER_GENERALNAME_TYPE_NOT_SUPPORTED); |
62dcd2aa DDO |
467 | goto err; |
468 | } | |
469 | if (!OSSL_CMP_CTX_set1_recipient(ctx, hdr->sender->d.directoryName)) | |
470 | goto err; | |
471 | ||
7df56ada | 472 | req_type = OSSL_CMP_MSG_get_bodytype(req); |
62dcd2aa DDO |
473 | switch (req_type) { |
474 | case OSSL_CMP_PKIBODY_IR: | |
475 | case OSSL_CMP_PKIBODY_CR: | |
476 | case OSSL_CMP_PKIBODY_P10CR: | |
477 | case OSSL_CMP_PKIBODY_KUR: | |
478 | case OSSL_CMP_PKIBODY_RR: | |
479 | case OSSL_CMP_PKIBODY_GENM: | |
480 | case OSSL_CMP_PKIBODY_ERROR: | |
481 | if (ctx->transactionID != NULL) { | |
482 | char *tid; | |
483 | ||
484 | tid = OPENSSL_buf2hexstr(ctx->transactionID->data, | |
485 | ctx->transactionID->length); | |
5aed1786 DDO |
486 | if (tid != NULL) |
487 | ossl_cmp_log1(WARN, ctx, | |
488 | "Assuming that last transaction with ID=%s got aborted", | |
489 | tid); | |
62dcd2aa DDO |
490 | OPENSSL_free(tid); |
491 | } | |
045229cf DDO |
492 | /* start of a new transaction, reset transactionID and senderNonce */ |
493 | if (!OSSL_CMP_CTX_set1_transactionID(ctx, NULL) | |
494 | || !OSSL_CMP_CTX_set1_senderNonce(ctx, NULL)) | |
62dcd2aa DDO |
495 | goto err; |
496 | break; | |
497 | default: | |
498 | /* transactionID should be already initialized */ | |
499 | if (ctx->transactionID == NULL) { | |
e599d0ae | 500 | #ifndef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION |
9311d0c4 | 501 | ERR_raise(ERR_LIB_CMP, CMP_R_UNEXPECTED_PKIBODY); |
62dcd2aa | 502 | goto err; |
e599d0ae | 503 | #endif |
62dcd2aa DDO |
504 | } |
505 | } | |
5a0e0541 DDO |
506 | ossl_cmp_log1(DEBUG, ctx, |
507 | "received %s", ossl_cmp_bodytype_to_string(req_type)); | |
62dcd2aa | 508 | |
12bbcee2 DDO |
509 | res = ossl_cmp_msg_check_update(ctx, req, unprotected_exception, |
510 | srv_ctx->acceptUnprotected); | |
511 | if (ctx->secretValue != NULL && ctx->pkey != NULL | |
512 | && ossl_cmp_hdr_get_protection_nid(hdr) != NID_id_PasswordBasedMAC) | |
513 | ctx->secretValue = NULL; /* use MSG_SIG_ALG when protecting rsp */ | |
514 | if (!res) | |
62dcd2aa DDO |
515 | goto err; |
516 | ||
517 | switch (req_type) { | |
518 | case OSSL_CMP_PKIBODY_IR: | |
519 | case OSSL_CMP_PKIBODY_CR: | |
520 | case OSSL_CMP_PKIBODY_P10CR: | |
521 | case OSSL_CMP_PKIBODY_KUR: | |
522 | if (srv_ctx->process_cert_request == NULL) | |
9311d0c4 | 523 | ERR_raise(ERR_LIB_CMP, CMP_R_UNEXPECTED_PKIBODY); |
62dcd2aa DDO |
524 | else |
525 | rsp = process_cert_request(srv_ctx, req); | |
526 | break; | |
527 | case OSSL_CMP_PKIBODY_RR: | |
528 | if (srv_ctx->process_rr == NULL) | |
9311d0c4 | 529 | ERR_raise(ERR_LIB_CMP, CMP_R_UNEXPECTED_PKIBODY); |
62dcd2aa DDO |
530 | else |
531 | rsp = process_rr(srv_ctx, req); | |
532 | break; | |
533 | case OSSL_CMP_PKIBODY_GENM: | |
534 | if (srv_ctx->process_genm == NULL) | |
9311d0c4 | 535 | ERR_raise(ERR_LIB_CMP, CMP_R_UNEXPECTED_PKIBODY); |
62dcd2aa DDO |
536 | else |
537 | rsp = process_genm(srv_ctx, req); | |
538 | break; | |
539 | case OSSL_CMP_PKIBODY_ERROR: | |
540 | if (srv_ctx->process_error == NULL) | |
9311d0c4 | 541 | ERR_raise(ERR_LIB_CMP, CMP_R_UNEXPECTED_PKIBODY); |
62dcd2aa DDO |
542 | else |
543 | rsp = process_error(srv_ctx, req); | |
544 | break; | |
545 | case OSSL_CMP_PKIBODY_CERTCONF: | |
546 | if (srv_ctx->process_certConf == NULL) | |
9311d0c4 | 547 | ERR_raise(ERR_LIB_CMP, CMP_R_UNEXPECTED_PKIBODY); |
62dcd2aa DDO |
548 | else |
549 | rsp = process_certConf(srv_ctx, req); | |
550 | break; | |
551 | case OSSL_CMP_PKIBODY_POLLREQ: | |
552 | if (srv_ctx->process_pollReq == NULL) | |
9311d0c4 | 553 | ERR_raise(ERR_LIB_CMP, CMP_R_UNEXPECTED_PKIBODY); |
62dcd2aa DDO |
554 | else |
555 | rsp = process_pollReq(srv_ctx, req); | |
556 | break; | |
557 | default: | |
9311d0c4 | 558 | ERR_raise(ERR_LIB_CMP, CMP_R_UNEXPECTED_PKIBODY); |
e599d0ae | 559 | break; |
62dcd2aa DDO |
560 | } |
561 | ||
562 | err: | |
563 | if (rsp == NULL) { | |
564 | /* on error, try to respond with CMP error message to client */ | |
991519ae | 565 | const char *data = NULL, *reason = NULL; |
62dcd2aa DDO |
566 | int flags = 0; |
567 | unsigned long err = ERR_peek_error_data(&data, &flags); | |
568 | int fail_info = 1 << OSSL_CMP_PKIFAILUREINFO_badRequest; | |
62dcd2aa DDO |
569 | OSSL_CMP_PKISI *si = NULL; |
570 | ||
5aed1786 DDO |
571 | if (ctx->transactionID == NULL) { |
572 | /* ignore any (extra) error in next two function calls: */ | |
573 | (void)OSSL_CMP_CTX_set1_transactionID(ctx, hdr->transactionID); | |
574 | (void)ossl_cmp_ctx_set1_recipNonce(ctx, hdr->senderNonce); | |
575 | } | |
576 | ||
991519ae DDO |
577 | if ((flags & ERR_TXT_STRING) == 0 || *data == '\0') |
578 | data = NULL; | |
579 | reason = ERR_reason_error_string(err); | |
62dcd2aa | 580 | if ((si = OSSL_CMP_STATUSINFO_new(OSSL_CMP_PKISTATUS_rejection, |
991519ae DDO |
581 | fail_info, reason)) != NULL) { |
582 | rsp = ossl_cmp_error_new(srv_ctx->ctx, si, err, | |
12bbcee2 DDO |
583 | data, srv_ctx->sendUnprotectedErrors); |
584 | OSSL_CMP_PKISI_free(si); | |
585 | } | |
62dcd2aa | 586 | } |
35d445be | 587 | OSSL_CMP_CTX_print_errors(ctx); |
12bbcee2 | 588 | ctx->secretValue = backup_secret; |
62dcd2aa | 589 | |
62dcd2aa | 590 | rsp_type = |
7df56ada | 591 | rsp != NULL ? OSSL_CMP_MSG_get_bodytype(rsp) : OSSL_CMP_PKIBODY_ERROR; |
5a0e0541 DDO |
592 | if (rsp != NULL) |
593 | ossl_cmp_log1(DEBUG, ctx, | |
594 | "sending %s", ossl_cmp_bodytype_to_string(rsp_type)); | |
595 | else | |
596 | ossl_cmp_log(ERR, ctx, "cannot send proper CMP response"); | |
597 | ||
598 | /* possibly close the transaction */ | |
599 | ctx->status = -2; /* this indicates transaction is open */ | |
62dcd2aa DDO |
600 | switch (rsp_type) { |
601 | case OSSL_CMP_PKIBODY_IP: | |
602 | case OSSL_CMP_PKIBODY_CP: | |
603 | case OSSL_CMP_PKIBODY_KUP: | |
7e765f46 | 604 | if (OSSL_CMP_CTX_get_option(ctx, OSSL_CMP_OPT_IMPLICIT_CONFIRM) == 0) |
62dcd2aa DDO |
605 | break; |
606 | /* fall through */ | |
607 | ||
5a0e0541 | 608 | case OSSL_CMP_PKIBODY_RP: |
62dcd2aa DDO |
609 | case OSSL_CMP_PKIBODY_PKICONF: |
610 | case OSSL_CMP_PKIBODY_GENP: | |
611 | case OSSL_CMP_PKIBODY_ERROR: | |
045229cf DDO |
612 | (void)OSSL_CMP_CTX_set1_transactionID(ctx, NULL); |
613 | (void)OSSL_CMP_CTX_set1_senderNonce(ctx, NULL); | |
5a0e0541 | 614 | ctx->status = -1; /* transaction closed */ |
62dcd2aa DDO |
615 | |
616 | default: /* not closing transaction in other cases */ | |
617 | break; | |
618 | } | |
619 | return rsp; | |
620 | } | |
621 | ||
622 | /* | |
623 | * Server interface that may substitute OSSL_CMP_MSG_http_perform at the client. | |
624 | * The OSSL_CMP_SRV_CTX must be set as client_ctx->transfer_cb_arg. | |
625 | * returns received message on success, else NULL and pushes an element on the | |
626 | * error stack. | |
627 | */ | |
5a0e0541 DDO |
628 | OSSL_CMP_MSG *OSSL_CMP_CTX_server_perform(OSSL_CMP_CTX *client_ctx, |
629 | const OSSL_CMP_MSG *req) | |
62dcd2aa DDO |
630 | { |
631 | OSSL_CMP_SRV_CTX *srv_ctx = NULL; | |
632 | ||
633 | if (client_ctx == NULL || req == NULL) { | |
9311d0c4 | 634 | ERR_raise(ERR_LIB_CMP, CMP_R_NULL_ARGUMENT); |
5a0e0541 | 635 | return NULL; |
62dcd2aa DDO |
636 | } |
637 | ||
638 | if ((srv_ctx = OSSL_CMP_CTX_get_transfer_cb_arg(client_ctx)) == NULL) { | |
9311d0c4 | 639 | ERR_raise(ERR_LIB_CMP, CMP_R_TRANSFER_ERROR); |
5a0e0541 | 640 | return NULL; |
62dcd2aa DDO |
641 | } |
642 | ||
643 | return OSSL_CMP_SRV_process_request(srv_ctx, req); | |
644 | } |