1 /* 2 * Copyright 2007-2023 The OpenSSL Project Authors. All Rights Reserved. 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 void *custom_ctx; /* pointer to application-specific server context */ 26 OSSL_CMP_CTX *ctx; /* Client CMP context, reusing transactionID etc. */ 27 int certReqId; /* id of last ir/cr/kur, OSSL_CMP_CERTREQID_NONE for p10cr */ 28 29 OSSL_CMP_SRV_cert_request_cb_t process_cert_request; 30 OSSL_CMP_SRV_rr_cb_t process_rr; 31 OSSL_CMP_SRV_genm_cb_t process_genm; 32 OSSL_CMP_SRV_error_cb_t process_error; 33 OSSL_CMP_SRV_certConf_cb_t process_certConf; 34 OSSL_CMP_SRV_pollReq_cb_t process_pollReq; 35 36 int sendUnprotectedErrors; /* Send error and rejection msgs unprotected */ 37 int acceptUnprotected; /* Accept requests with no/invalid prot. */ 38 int acceptRAVerified; /* Accept ir/cr/kur with POPO RAVerified */ 39 int grantImplicitConfirm; /* Grant implicit confirmation if requested */ 40 41 }; /* OSSL_CMP_SRV_CTX */ 42 43 void OSSL_CMP_SRV_CTX_free(OSSL_CMP_SRV_CTX *srv_ctx) 44 { 45 if (srv_ctx == NULL) 46 return; 47 48 OSSL_CMP_CTX_free(srv_ctx->ctx); 49 OPENSSL_free(srv_ctx); 50 } 51 52 OSSL_CMP_SRV_CTX *OSSL_CMP_SRV_CTX_new(OSSL_LIB_CTX *libctx, const char *propq) 53 { 54 OSSL_CMP_SRV_CTX *ctx = OPENSSL_zalloc(sizeof(OSSL_CMP_SRV_CTX)); 55 56 if (ctx == NULL) 57 goto err; 58 59 if ((ctx->ctx = OSSL_CMP_CTX_new(libctx, propq)) == NULL) 60 goto err; 61 ctx->certReqId = OSSL_CMP_CERTREQID_INVALID; 62 63 /* all other elements are initialized to 0 or NULL, respectively */ 64 return ctx; 65 err: 66 OSSL_CMP_SRV_CTX_free(ctx); 67 return NULL; 68 } 69 70 int OSSL_CMP_SRV_CTX_init(OSSL_CMP_SRV_CTX *srv_ctx, void *custom_ctx, 71 OSSL_CMP_SRV_cert_request_cb_t process_cert_request, 72 OSSL_CMP_SRV_rr_cb_t process_rr, 73 OSSL_CMP_SRV_genm_cb_t process_genm, 74 OSSL_CMP_SRV_error_cb_t process_error, 75 OSSL_CMP_SRV_certConf_cb_t process_certConf, 76 OSSL_CMP_SRV_pollReq_cb_t process_pollReq) 77 { 78 if (srv_ctx == NULL) { 79 ERR_raise(ERR_LIB_CMP, CMP_R_NULL_ARGUMENT); 80 return 0; 81 } 82 srv_ctx->custom_ctx = custom_ctx; 83 srv_ctx->process_cert_request = process_cert_request; 84 srv_ctx->process_rr = process_rr; 85 srv_ctx->process_genm = process_genm; 86 srv_ctx->process_error = process_error; 87 srv_ctx->process_certConf = process_certConf; 88 srv_ctx->process_pollReq = process_pollReq; 89 return 1; 90 } 91 92 OSSL_CMP_CTX *OSSL_CMP_SRV_CTX_get0_cmp_ctx(const OSSL_CMP_SRV_CTX *srv_ctx) 93 { 94 if (srv_ctx == NULL) { 95 ERR_raise(ERR_LIB_CMP, CMP_R_NULL_ARGUMENT); 96 return NULL; 97 } 98 return srv_ctx->ctx; 99 } 100 101 void *OSSL_CMP_SRV_CTX_get0_custom_ctx(const OSSL_CMP_SRV_CTX *srv_ctx) 102 { 103 if (srv_ctx == NULL) { 104 ERR_raise(ERR_LIB_CMP, CMP_R_NULL_ARGUMENT); 105 return NULL; 106 } 107 return srv_ctx->custom_ctx; 108 } 109 110 int OSSL_CMP_SRV_CTX_set_send_unprotected_errors(OSSL_CMP_SRV_CTX *srv_ctx, 111 int val) 112 { 113 if (srv_ctx == NULL) { 114 ERR_raise(ERR_LIB_CMP, CMP_R_NULL_ARGUMENT); 115 return 0; 116 } 117 srv_ctx->sendUnprotectedErrors = val != 0; 118 return 1; 119 } 120 121 int OSSL_CMP_SRV_CTX_set_accept_unprotected(OSSL_CMP_SRV_CTX *srv_ctx, int val) 122 { 123 if (srv_ctx == NULL) { 124 ERR_raise(ERR_LIB_CMP, CMP_R_NULL_ARGUMENT); 125 return 0; 126 } 127 srv_ctx->acceptUnprotected = val != 0; 128 return 1; 129 } 130 131 int OSSL_CMP_SRV_CTX_set_accept_raverified(OSSL_CMP_SRV_CTX *srv_ctx, int val) 132 { 133 if (srv_ctx == NULL) { 134 ERR_raise(ERR_LIB_CMP, CMP_R_NULL_ARGUMENT); 135 return 0; 136 } 137 srv_ctx->acceptRAVerified = val != 0; 138 return 1; 139 } 140 141 int OSSL_CMP_SRV_CTX_set_grant_implicit_confirm(OSSL_CMP_SRV_CTX *srv_ctx, 142 int val) 143 { 144 if (srv_ctx == NULL) { 145 ERR_raise(ERR_LIB_CMP, CMP_R_NULL_ARGUMENT); 146 return 0; 147 } 148 srv_ctx->grantImplicitConfirm = val != 0; 149 return 1; 150 } 151 152 /* 153 * Processes an ir/cr/p10cr/kur and returns a certification response. 154 * Only handles the first certification request contained in req 155 * returns an ip/cp/kup on success and NULL on error 156 */ 157 static OSSL_CMP_MSG *process_cert_request(OSSL_CMP_SRV_CTX *srv_ctx, 158 const OSSL_CMP_MSG *req) 159 { 160 OSSL_CMP_MSG *msg = NULL; 161 OSSL_CMP_PKISI *si = NULL; 162 X509 *certOut = NULL; 163 STACK_OF(X509) *chainOut = NULL, *caPubs = NULL; 164 const OSSL_CRMF_MSG *crm = NULL; 165 const X509_REQ *p10cr = NULL; 166 int bodytype; 167 int certReqId; 168 169 if (!ossl_assert(srv_ctx != NULL && srv_ctx->ctx != NULL && req != NULL)) 170 return NULL; 171 172 switch (OSSL_CMP_MSG_get_bodytype(req)) { 173 case OSSL_CMP_PKIBODY_P10CR: 174 case OSSL_CMP_PKIBODY_CR: 175 bodytype = OSSL_CMP_PKIBODY_CP; 176 break; 177 case OSSL_CMP_PKIBODY_IR: 178 bodytype = OSSL_CMP_PKIBODY_IP; 179 break; 180 case OSSL_CMP_PKIBODY_KUR: 181 bodytype = OSSL_CMP_PKIBODY_KUP; 182 break; 183 default: 184 ERR_raise(ERR_LIB_CMP, CMP_R_UNEXPECTED_PKIBODY); 185 return NULL; 186 } 187 188 if (OSSL_CMP_MSG_get_bodytype(req) == OSSL_CMP_PKIBODY_P10CR) { 189 certReqId = OSSL_CMP_CERTREQID_NONE; /* p10cr does not include an Id */ 190 p10cr = req->body->value.p10cr; 191 } else { 192 OSSL_CRMF_MSGS *reqs = req->body->value.ir; /* same for cr and kur */ 193 194 if (sk_OSSL_CRMF_MSG_num(reqs) != 1) { 195 ERR_raise(ERR_LIB_CMP, CMP_R_MULTIPLE_REQUESTS_NOT_SUPPORTED); 196 return NULL; 197 } 198 199 if ((crm = sk_OSSL_CRMF_MSG_value(reqs, OSSL_CMP_CERTREQID)) == NULL) { 200 ERR_raise(ERR_LIB_CMP, CMP_R_CERTREQMSG_NOT_FOUND); 201 return NULL; 202 } 203 certReqId = OSSL_CRMF_MSG_get_certReqId(crm); 204 if (certReqId != OSSL_CMP_CERTREQID) { 205 ERR_raise(ERR_LIB_CMP, CMP_R_BAD_REQUEST_ID); 206 return 0; 207 } 208 } 209 srv_ctx->certReqId = certReqId; 210 211 if (!ossl_cmp_verify_popo(srv_ctx->ctx, req, srv_ctx->acceptRAVerified)) { 212 /* Proof of possession could not be verified */ 213 si = OSSL_CMP_STATUSINFO_new(OSSL_CMP_PKISTATUS_rejection, 214 1 << OSSL_CMP_PKIFAILUREINFO_badPOP, 215 ERR_reason_error_string(ERR_peek_error())); 216 if (si == NULL) 217 return NULL; 218 } else { 219 OSSL_CMP_PKIHEADER *hdr = OSSL_CMP_MSG_get0_header(req); 220 221 si = srv_ctx->process_cert_request(srv_ctx, req, certReqId, crm, p10cr, 222 &certOut, &chainOut, &caPubs); 223 if (si == NULL) 224 goto err; 225 /* set OSSL_CMP_OPT_IMPLICIT_CONFIRM if and only if transaction ends */ 226 if (!OSSL_CMP_CTX_set_option(srv_ctx->ctx, 227 OSSL_CMP_OPT_IMPLICIT_CONFIRM, 228 ossl_cmp_hdr_has_implicitConfirm(hdr) 229 && srv_ctx->grantImplicitConfirm 230 /* do not set if polling starts: */ 231 && certOut != NULL)) 232 goto err; 233 } 234 235 msg = ossl_cmp_certrep_new(srv_ctx->ctx, bodytype, certReqId, si, 236 certOut, NULL /* enc */, chainOut, caPubs, 237 srv_ctx->sendUnprotectedErrors); 238 if (msg == NULL) 239 ERR_raise(ERR_LIB_CMP, CMP_R_ERROR_CREATING_CERTREP); 240 241 err: 242 OSSL_CMP_PKISI_free(si); 243 X509_free(certOut); 244 sk_X509_pop_free(chainOut, X509_free); 245 sk_X509_pop_free(caPubs, X509_free); 246 return msg; 247 } 248 249 static OSSL_CMP_MSG *process_rr(OSSL_CMP_SRV_CTX *srv_ctx, 250 const OSSL_CMP_MSG *req) 251 { 252 OSSL_CMP_MSG *msg = NULL; 253 OSSL_CMP_REVDETAILS *details; 254 OSSL_CRMF_CERTID *certId = NULL; 255 OSSL_CRMF_CERTTEMPLATE *tmpl; 256 const X509_NAME *issuer; 257 const ASN1_INTEGER *serial; 258 OSSL_CMP_PKISI *si; 259 260 if (!ossl_assert(srv_ctx != NULL && srv_ctx->ctx != NULL && req != NULL)) 261 return NULL; 262 263 if (sk_OSSL_CMP_REVDETAILS_num(req->body->value.rr) != 1) { 264 ERR_raise(ERR_LIB_CMP, CMP_R_MULTIPLE_REQUESTS_NOT_SUPPORTED); 265 return NULL; 266 } 267 268 if ((details = sk_OSSL_CMP_REVDETAILS_value(req->body->value.rr, 269 OSSL_CMP_REVREQSID)) == NULL) { 270 ERR_raise(ERR_LIB_CMP, CMP_R_ERROR_PROCESSING_MESSAGE); 271 return NULL; 272 } 273 274 tmpl = details->certDetails; 275 issuer = OSSL_CRMF_CERTTEMPLATE_get0_issuer(tmpl); 276 serial = OSSL_CRMF_CERTTEMPLATE_get0_serialNumber(tmpl); 277 if (issuer != NULL && serial != NULL 278 && (certId = OSSL_CRMF_CERTID_gen(issuer, serial)) == NULL) 279 return NULL; 280 if ((si = srv_ctx->process_rr(srv_ctx, req, issuer, serial)) == NULL) 281 goto err; 282 283 if ((msg = ossl_cmp_rp_new(srv_ctx->ctx, si, certId, 284 srv_ctx->sendUnprotectedErrors)) == NULL) 285 ERR_raise(ERR_LIB_CMP, CMP_R_ERROR_CREATING_RR); 286 287 err: 288 OSSL_CRMF_CERTID_free(certId); 289 OSSL_CMP_PKISI_free(si); 290 return msg; 291 } 292 293 /* 294 * Processes genm and creates a genp message mirroring the contents of the 295 * incoming message 296 */ 297 static OSSL_CMP_MSG *process_genm(OSSL_CMP_SRV_CTX *srv_ctx, 298 const OSSL_CMP_MSG *req) 299 { 300 OSSL_CMP_GENMSGCONTENT *itavs; 301 OSSL_CMP_MSG *msg; 302 303 if (!ossl_assert(srv_ctx != NULL && srv_ctx->ctx != NULL && req != NULL)) 304 return NULL; 305 306 if (!srv_ctx->process_genm(srv_ctx, req, req->body->value.genm, &itavs)) 307 return NULL; 308 309 msg = ossl_cmp_genp_new(srv_ctx->ctx, itavs); 310 sk_OSSL_CMP_ITAV_pop_free(itavs, OSSL_CMP_ITAV_free); 311 return msg; 312 } 313 314 static OSSL_CMP_MSG *process_error(OSSL_CMP_SRV_CTX *srv_ctx, 315 const OSSL_CMP_MSG *req) 316 { 317 OSSL_CMP_ERRORMSGCONTENT *errorContent; 318 OSSL_CMP_MSG *msg; 319 320 if (!ossl_assert(srv_ctx != NULL && srv_ctx->ctx != NULL && req != NULL)) 321 return NULL; 322 errorContent = req->body->value.error; 323 srv_ctx->process_error(srv_ctx, req, errorContent->pKIStatusInfo, 324 errorContent->errorCode, errorContent->errorDetails); 325 326 if ((msg = ossl_cmp_pkiconf_new(srv_ctx->ctx)) == NULL) 327 ERR_raise(ERR_LIB_CMP, CMP_R_ERROR_CREATING_PKICONF); 328 return msg; 329 } 330 331 static OSSL_CMP_MSG *process_certConf(OSSL_CMP_SRV_CTX *srv_ctx, 332 const OSSL_CMP_MSG *req) 333 { 334 OSSL_CMP_CTX *ctx; 335 OSSL_CMP_CERTCONFIRMCONTENT *ccc; 336 int num; 337 OSSL_CMP_MSG *msg = NULL; 338 OSSL_CMP_CERTSTATUS *status = NULL; 339 340 if (!ossl_assert(srv_ctx != NULL && srv_ctx->ctx != NULL && req != NULL)) 341 return NULL; 342 343 ctx = srv_ctx->ctx; 344 ccc = req->body->value.certConf; 345 num = sk_OSSL_CMP_CERTSTATUS_num(ccc); 346 347 if (OSSL_CMP_CTX_get_option(ctx, OSSL_CMP_OPT_IMPLICIT_CONFIRM) == 1 348 || ctx->status != OSSL_CMP_PKISTATUS_trans) { 349 ERR_raise(ERR_LIB_CMP, CMP_R_ERROR_UNEXPECTED_CERTCONF); 350 return NULL; 351 } 352 353 if (num == 0) { 354 ossl_cmp_err(ctx, "certificate rejected by client"); 355 } else { 356 if (num > 1) 357 ossl_cmp_warn(ctx, "All CertStatus but the first will be ignored"); 358 status = sk_OSSL_CMP_CERTSTATUS_value(ccc, OSSL_CMP_CERTREQID); 359 } 360 361 if (status != NULL) { 362 int certReqId = ossl_cmp_asn1_get_int(status->certReqId); 363 ASN1_OCTET_STRING *certHash = status->certHash; 364 OSSL_CMP_PKISI *si = status->statusInfo; 365 366 if (certReqId != srv_ctx->certReqId) { 367 ERR_raise(ERR_LIB_CMP, CMP_R_BAD_REQUEST_ID); 368 return NULL; 369 } 370 if (!srv_ctx->process_certConf(srv_ctx, req, certReqId, certHash, si)) 371 return NULL; /* reason code may be: CMP_R_CERTHASH_UNMATCHED */ 372 373 if (si != NULL 374 && ossl_cmp_pkisi_get_status(si) != OSSL_CMP_PKISTATUS_accepted) { 375 int pki_status = ossl_cmp_pkisi_get_status(si); 376 const char *str = ossl_cmp_PKIStatus_to_string(pki_status); 377 378 ossl_cmp_log2(INFO, ctx, "certificate rejected by client %s %s", 379 str == NULL ? "without" : "with", 380 str == NULL ? "PKIStatus" : str); 381 } 382 } 383 384 if ((msg = ossl_cmp_pkiconf_new(ctx)) == NULL) 385 ERR_raise(ERR_LIB_CMP, CMP_R_ERROR_CREATING_PKICONF); 386 return msg; 387 } 388 389 static OSSL_CMP_MSG *process_pollReq(OSSL_CMP_SRV_CTX *srv_ctx, 390 const OSSL_CMP_MSG *req) 391 { 392 OSSL_CMP_POLLREQCONTENT *prc; 393 OSSL_CMP_POLLREQ *pr; 394 int certReqId; 395 OSSL_CMP_MSG *certReq; 396 int64_t check_after = 0; 397 OSSL_CMP_MSG *msg = NULL; 398 399 if (!ossl_assert(srv_ctx != NULL && srv_ctx->ctx != NULL && req != NULL)) 400 return NULL; 401 402 prc = req->body->value.pollReq; 403 if (sk_OSSL_CMP_POLLREQ_num(prc) != 1) { 404 ERR_raise(ERR_LIB_CMP, CMP_R_MULTIPLE_REQUESTS_NOT_SUPPORTED); 405 return NULL; 406 } 407 408 pr = sk_OSSL_CMP_POLLREQ_value(prc, OSSL_CMP_CERTREQID); 409 certReqId = ossl_cmp_asn1_get_int(pr->certReqId); 410 if (certReqId != srv_ctx->certReqId) { 411 ERR_raise(ERR_LIB_CMP, CMP_R_BAD_REQUEST_ID); 412 return NULL; 413 } 414 if (!srv_ctx->process_pollReq(srv_ctx, req, certReqId, 415 &certReq, &check_after)) 416 return NULL; 417 418 if (certReq != NULL) { 419 msg = process_cert_request(srv_ctx, certReq); 420 OSSL_CMP_MSG_free(certReq); 421 } else { 422 if ((msg = ossl_cmp_pollRep_new(srv_ctx->ctx, certReqId, 423 check_after)) == NULL) 424 ERR_raise(ERR_LIB_CMP, CMP_R_ERROR_CREATING_POLLREP); 425 } 426 return msg; 427 } 428 429 /* 430 * Determine whether missing/invalid protection of request message is allowed. 431 * Return 1 on acceptance, 0 on rejection, or -1 on (internal) error. 432 */ 433 static int unprotected_exception(const OSSL_CMP_CTX *ctx, 434 const OSSL_CMP_MSG *req, 435 int invalid_protection, 436 int accept_unprotected_requests) 437 { 438 if (!ossl_assert(ctx != NULL && req != NULL)) 439 return -1; 440 441 if (accept_unprotected_requests) { 442 ossl_cmp_log1(WARN, ctx, "ignoring %s protection of request message", 443 invalid_protection ? "invalid" : "missing"); 444 return 1; 445 } 446 if (OSSL_CMP_MSG_get_bodytype(req) == OSSL_CMP_PKIBODY_ERROR 447 && OSSL_CMP_CTX_get_option(ctx, OSSL_CMP_OPT_UNPROTECTED_ERRORS) == 1) { 448 ossl_cmp_warn(ctx, "ignoring missing protection of error message"); 449 return 1; 450 } 451 return 0; 452 } 453 454 /* 455 * returns created message and NULL on internal error 456 */ 457 OSSL_CMP_MSG *OSSL_CMP_SRV_process_request(OSSL_CMP_SRV_CTX *srv_ctx, 458 const OSSL_CMP_MSG *req) 459 { 460 OSSL_CMP_CTX *ctx; 461 ASN1_OCTET_STRING *backup_secret; 462 OSSL_CMP_PKIHEADER *hdr; 463 int req_type, rsp_type; 464 int req_verified = 0; 465 OSSL_CMP_MSG *rsp = NULL; 466 467 if (srv_ctx == NULL || srv_ctx->ctx == NULL 468 || req == NULL || req->body == NULL 469 || (hdr = OSSL_CMP_MSG_get0_header(req)) == NULL) { 470 ERR_raise(ERR_LIB_CMP, CMP_R_NULL_ARGUMENT); 471 return 0; 472 } 473 ctx = srv_ctx->ctx; 474 backup_secret = ctx->secretValue; 475 req_type = OSSL_CMP_MSG_get_bodytype(req); 476 ossl_cmp_log1(DEBUG, ctx, 477 "received %s", ossl_cmp_bodytype_to_string(req_type)); 478 479 /* 480 * Some things need to be done already before validating the message in 481 * order to be able to send an error message as far as needed and possible. 482 */ 483 if (hdr->sender->type != GEN_DIRNAME) { 484 ERR_raise(ERR_LIB_CMP, CMP_R_SENDER_GENERALNAME_TYPE_NOT_SUPPORTED); 485 goto err; 486 } 487 if (!OSSL_CMP_CTX_set1_recipient(ctx, hdr->sender->d.directoryName)) 488 goto err; 489 490 switch (req_type) { 491 case OSSL_CMP_PKIBODY_IR: 492 case OSSL_CMP_PKIBODY_CR: 493 case OSSL_CMP_PKIBODY_P10CR: 494 case OSSL_CMP_PKIBODY_KUR: 495 case OSSL_CMP_PKIBODY_RR: 496 case OSSL_CMP_PKIBODY_GENM: 497 case OSSL_CMP_PKIBODY_ERROR: 498 if (ctx->transactionID != NULL) { 499 char *tid; 500 501 tid = OPENSSL_buf2hexstr(ctx->transactionID->data, 502 ctx->transactionID->length); 503 if (tid != NULL) 504 ossl_cmp_log1(WARN, ctx, 505 "Assuming that last transaction with ID=%s got aborted", 506 tid); 507 OPENSSL_free(tid); 508 } 509 /* start of a new transaction, reset transactionID and senderNonce */ 510 if (!OSSL_CMP_CTX_set1_transactionID(ctx, NULL) 511 || !OSSL_CMP_CTX_set1_senderNonce(ctx, NULL)) 512 goto err; 513 break; 514 default: 515 /* transactionID should be already initialized */ 516 if (ctx->transactionID == NULL) { 517 #ifndef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 518 ERR_raise(ERR_LIB_CMP, CMP_R_UNEXPECTED_PKIBODY); 519 goto err; 520 #endif 521 } 522 } 523 524 req_verified = ossl_cmp_msg_check_update(ctx, req, unprotected_exception, 525 srv_ctx->acceptUnprotected); 526 if (ctx->secretValue != NULL && ctx->pkey != NULL 527 && ossl_cmp_hdr_get_protection_nid(hdr) != NID_id_PasswordBasedMAC) 528 ctx->secretValue = NULL; /* use MSG_SIG_ALG when protecting rsp */ 529 if (!req_verified) 530 goto err; 531 532 switch (req_type) { 533 case OSSL_CMP_PKIBODY_IR: 534 case OSSL_CMP_PKIBODY_CR: 535 case OSSL_CMP_PKIBODY_P10CR: 536 case OSSL_CMP_PKIBODY_KUR: 537 if (srv_ctx->process_cert_request == NULL) 538 ERR_raise(ERR_LIB_CMP, CMP_R_UNEXPECTED_PKIBODY); 539 else 540 rsp = process_cert_request(srv_ctx, req); 541 break; 542 case OSSL_CMP_PKIBODY_RR: 543 if (srv_ctx->process_rr == NULL) 544 ERR_raise(ERR_LIB_CMP, CMP_R_UNEXPECTED_PKIBODY); 545 else 546 rsp = process_rr(srv_ctx, req); 547 break; 548 case OSSL_CMP_PKIBODY_GENM: 549 if (srv_ctx->process_genm == NULL) 550 ERR_raise(ERR_LIB_CMP, CMP_R_UNEXPECTED_PKIBODY); 551 else 552 rsp = process_genm(srv_ctx, req); 553 break; 554 case OSSL_CMP_PKIBODY_ERROR: 555 if (srv_ctx->process_error == NULL) 556 ERR_raise(ERR_LIB_CMP, CMP_R_UNEXPECTED_PKIBODY); 557 else 558 rsp = process_error(srv_ctx, req); 559 break; 560 case OSSL_CMP_PKIBODY_CERTCONF: 561 if (srv_ctx->process_certConf == NULL) 562 ERR_raise(ERR_LIB_CMP, CMP_R_UNEXPECTED_PKIBODY); 563 else 564 rsp = process_certConf(srv_ctx, req); 565 break; 566 case OSSL_CMP_PKIBODY_POLLREQ: 567 if (srv_ctx->process_pollReq == NULL) 568 ERR_raise(ERR_LIB_CMP, CMP_R_UNEXPECTED_PKIBODY); 569 else 570 rsp = process_pollReq(srv_ctx, req); 571 break; 572 default: 573 ERR_raise(ERR_LIB_CMP, CMP_R_UNEXPECTED_PKIBODY); 574 break; 575 } 576 577 err: 578 if (rsp == NULL) { 579 /* on error, try to respond with CMP error message to client */ 580 const char *data = NULL, *reason = NULL; 581 int flags = 0; 582 unsigned long err = ERR_peek_error_data(&data, &flags); 583 int fail_info = 1 << OSSL_CMP_PKIFAILUREINFO_badRequest; 584 OSSL_CMP_PKISI *si = NULL; 585 586 if (!req_verified) { 587 /* 588 * Above ossl_cmp_msg_check_update() was not successfully executed, 589 * which normally would set ctx->transactionID and ctx->recipNonce. 590 * So anyway try to provide the right transactionID and recipNonce, 591 * while ignoring any (extra) error in next two function calls. 592 */ 593 if (ctx->transactionID == NULL) 594 (void)OSSL_CMP_CTX_set1_transactionID(ctx, hdr->transactionID); 595 (void)ossl_cmp_ctx_set1_recipNonce(ctx, hdr->senderNonce); 596 } 597 598 if ((flags & ERR_TXT_STRING) == 0 || *data == '\0') 599 data = NULL; 600 reason = ERR_reason_error_string(err); 601 if ((si = OSSL_CMP_STATUSINFO_new(OSSL_CMP_PKISTATUS_rejection, 602 fail_info, reason)) != NULL) { 603 rsp = ossl_cmp_error_new(srv_ctx->ctx, si, err, 604 data, srv_ctx->sendUnprotectedErrors); 605 OSSL_CMP_PKISI_free(si); 606 } 607 } 608 OSSL_CMP_CTX_print_errors(ctx); 609 ctx->secretValue = backup_secret; 610 611 rsp_type = 612 rsp != NULL ? OSSL_CMP_MSG_get_bodytype(rsp) : OSSL_CMP_PKIBODY_ERROR; 613 if (rsp != NULL) 614 ossl_cmp_log1(DEBUG, ctx, 615 "sending %s", ossl_cmp_bodytype_to_string(rsp_type)); 616 else 617 ossl_cmp_log(ERR, ctx, "cannot send proper CMP response"); 618 619 /* determine whether to keep the transaction open or not */ 620 ctx->status = OSSL_CMP_PKISTATUS_trans; 621 switch (rsp_type) { 622 case OSSL_CMP_PKIBODY_IP: 623 case OSSL_CMP_PKIBODY_CP: 624 case OSSL_CMP_PKIBODY_KUP: 625 if (OSSL_CMP_CTX_get_option(ctx, OSSL_CMP_OPT_IMPLICIT_CONFIRM) == 0) 626 break; 627 /* fall through */ 628 629 case OSSL_CMP_PKIBODY_RP: 630 case OSSL_CMP_PKIBODY_PKICONF: 631 case OSSL_CMP_PKIBODY_GENP: 632 case OSSL_CMP_PKIBODY_ERROR: 633 (void)OSSL_CMP_CTX_set1_transactionID(ctx, NULL); 634 (void)OSSL_CMP_CTX_set1_senderNonce(ctx, NULL); 635 ctx->status = OSSL_CMP_PKISTATUS_unspecified; /* transaction closed */ 636 637 default: /* not closing transaction in other cases */ 638 break; 639 } 640 return rsp; 641 } 642 643 /* 644 * Server interface that may substitute OSSL_CMP_MSG_http_perform at the client. 645 * The OSSL_CMP_SRV_CTX must be set as client_ctx->transfer_cb_arg. 646 * returns received message on success, else NULL and pushes an element on the 647 * error stack. 648 */ 649 OSSL_CMP_MSG *OSSL_CMP_CTX_server_perform(OSSL_CMP_CTX *client_ctx, 650 const OSSL_CMP_MSG *req) 651 { 652 OSSL_CMP_SRV_CTX *srv_ctx = NULL; 653 654 if (client_ctx == NULL || req == NULL) { 655 ERR_raise(ERR_LIB_CMP, CMP_R_NULL_ARGUMENT); 656 return NULL; 657 } 658 659 if ((srv_ctx = OSSL_CMP_CTX_get_transfer_cb_arg(client_ctx)) == NULL) { 660 ERR_raise(ERR_LIB_CMP, CMP_R_TRANSFER_ERROR); 661 return NULL; 662 } 663 664 return OSSL_CMP_SRV_process_request(srv_ctx, req); 665 } 666