crypto/cmp/cmp_msg.c

   1 /*
   2  * Copyright 2007-2019 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 /* CMP functions for PKIMessage construction */
  13
  14 #include "cmp_local.h"
  15
  16 /* explicit #includes not strictly needed since implied by the above: */
  17 #include <openssl/asn1t.h>
  18 #include <openssl/cmp.h>
  19 #include <openssl/crmf.h>
  20 #include <openssl/err.h>
  21 #include <openssl/x509.h>
  22
  23 OSSL_CMP_PKIHEADER *OSSL_CMP_MSG_get0_header(const OSSL_CMP_MSG *msg)
  24 {
  25     if (msg == NULL) {
  26         CMPerr(0, CMP_R_NULL_ARGUMENT);
  27         return NULL;
  28     }
  29     return msg->header;
  30 }
  31
  32 const char *ossl_cmp_bodytype_to_string(int type)
  33 {
  34     static const char *type_names[] = {
  35         "IR", "IP", "CR", "CP", "P10CR",
  36         "POPDECC", "POPDECR", "KUR", "KUP",
  37         "KRR", "KRP", "RR", "RP", "CCR", "CCP",
  38         "CKUANN", "CANN", "RANN", "CRLANN", "PKICONF", "NESTED",
  39         "GENM", "GENP", "ERROR", "CERTCONF", "POLLREQ", "POLLREP",
  40     };
  41
  42     if (type < 0 || type > OSSL_CMP_PKIBODY_TYPE_MAX)
  43         return "illegal body type";
  44     return type_names[type];
  45 }
  46
  47 int ossl_cmp_msg_set_bodytype(OSSL_CMP_MSG *msg, int type)
  48 {
  49     if (!ossl_assert(msg != NULL && msg->body != NULL))
  50         return 0;
  51
  52     msg->body->type = type;
  53     return 1;
  54 }
  55
  56 int ossl_cmp_msg_get_bodytype(const OSSL_CMP_MSG *msg)
  57 {
  58     if (!ossl_assert(msg != NULL && msg->body != NULL))
  59         return -1;
  60
  61     return msg->body->type;
  62 }
  63
  64 /* Add an extension to the referenced extension stack, which may be NULL */
  65 static int add1_extension(X509_EXTENSIONS **pexts, int nid, int crit, void *ex)
  66 {
  67     X509_EXTENSION *ext;
  68     int res;
  69
  70     if (!ossl_assert(pexts != NULL)) /* pointer to var must not be NULL */
  71         return 0;
  72
  73     if ((ext = X509V3_EXT_i2d(nid, crit, ex)) == NULL)
  74         return 0;
  75
  76     res = X509v3_add_ext(pexts, ext, 0) != NULL;
  77     X509_EXTENSION_free(ext);
  78     return res;
  79 }
  80
  81 /* Add a CRL revocation reason code to extension stack, which may be NULL */
  82 static int add_crl_reason_extension(X509_EXTENSIONS **pexts, int reason_code)
  83 {
  84     ASN1_ENUMERATED *val = ASN1_ENUMERATED_new();
  85     int res = 0;
  86
  87     if (val != NULL && ASN1_ENUMERATED_set(val, reason_code))
  88         res = add1_extension(pexts, NID_crl_reason, 0 /* non-critical */, val);
  89     ASN1_ENUMERATED_free(val);
  90     return res;
  91 }
  92
  93 OSSL_CMP_MSG *ossl_cmp_msg_create(OSSL_CMP_CTX *ctx, int bodytype)
  94 {
  95     OSSL_CMP_MSG *msg = NULL;
  96
  97     if (!ossl_assert(ctx != NULL))
  98         return NULL;
  99
 100     if ((msg = OSSL_CMP_MSG_new()) == NULL)
 101         return NULL;
 102     if (!ossl_cmp_hdr_init(ctx, msg->header)
 103             || !ossl_cmp_msg_set_bodytype(msg, bodytype))
 104         goto err;
 105     if (ctx->geninfo_ITAVs != NULL
 106             && !ossl_cmp_hdr_generalInfo_push1_items(msg->header,
 107                                                      ctx->geninfo_ITAVs))
 108         goto err;
 109
 110     switch (bodytype) {
 111     case OSSL_CMP_PKIBODY_IR:
 112     case OSSL_CMP_PKIBODY_CR:
 113     case OSSL_CMP_PKIBODY_KUR:
 114         if ((msg->body->value.ir = OSSL_CRMF_MSGS_new()) == NULL)
 115             goto err;
 116         return msg;
 117
 118     case OSSL_CMP_PKIBODY_P10CR:
 119         if (ctx->p10CSR == NULL) {
 120             CMPerr(0, CMP_R_ERROR_CREATING_P10CR);
 121             goto err;
 122         }
 123         if ((msg->body->value.p10cr = X509_REQ_dup(ctx->p10CSR)) == NULL)
 124             goto err;
 125         return msg;
 126
 127     case OSSL_CMP_PKIBODY_IP:
 128     case OSSL_CMP_PKIBODY_CP:
 129     case OSSL_CMP_PKIBODY_KUP:
 130         if ((msg->body->value.ip = OSSL_CMP_CERTREPMESSAGE_new()) == NULL)
 131             goto err;
 132         return msg;
 133
 134     case OSSL_CMP_PKIBODY_RR:
 135         if ((msg->body->value.rr = sk_OSSL_CMP_REVDETAILS_new_null()) == NULL)
 136             goto err;
 137         return msg;
 138     case OSSL_CMP_PKIBODY_RP:
 139         if ((msg->body->value.rp = OSSL_CMP_REVREPCONTENT_new()) == NULL)
 140             goto err;
 141         return msg;
 142
 143     case OSSL_CMP_PKIBODY_CERTCONF:
 144         if ((msg->body->value.certConf =
 145              sk_OSSL_CMP_CERTSTATUS_new_null()) == NULL)
 146             goto err;
 147         return msg;
 148     case OSSL_CMP_PKIBODY_PKICONF:
 149         if ((msg->body->value.pkiconf = ASN1_TYPE_new()) == NULL)
 150             goto err;
 151         ASN1_TYPE_set(msg->body->value.pkiconf, V_ASN1_NULL, NULL);
 152         return msg;
 153
 154     case OSSL_CMP_PKIBODY_POLLREQ:
 155         if ((msg->body->value.pollReq = sk_OSSL_CMP_POLLREQ_new_null()) == NULL)
 156             goto err;
 157         return msg;
 158     case OSSL_CMP_PKIBODY_POLLREP:
 159         if ((msg->body->value.pollRep = sk_OSSL_CMP_POLLREP_new_null()) == NULL)
 160             goto err;
 161         return msg;
 162
 163     case OSSL_CMP_PKIBODY_GENM:
 164     case OSSL_CMP_PKIBODY_GENP:
 165         if ((msg->body->value.genm = sk_OSSL_CMP_ITAV_new_null()) == NULL)
 166             goto err;
 167         return msg;
 168
 169     case OSSL_CMP_PKIBODY_ERROR:
 170         if ((msg->body->value.error = OSSL_CMP_ERRORMSGCONTENT_new()) == NULL)
 171             goto err;
 172         return msg;
 173
 174     default:
 175         CMPerr(0, CMP_R_UNEXPECTED_PKIBODY);
 176         goto err;
 177     }
 178
 179  err:
 180     OSSL_CMP_MSG_free(msg);
 181     return NULL;
 182 }
 183
 184 #define HAS_SAN(ctx) \
 185     (sk_GENERAL_NAME_num((ctx)->subjectAltNames) > 0 \
 186          || OSSL_CMP_CTX_reqExtensions_have_SAN(ctx) == 1)
 187
 188 static X509_NAME *determine_subj(OSSL_CMP_CTX *ctx, X509 *refcert,
 189                                  int bodytype)
 190 {
 191     if (ctx->subjectName != NULL)
 192         return ctx->subjectName;
 193
 194     if (refcert != NULL
 195             && (bodytype == OSSL_CMP_PKIBODY_KUR || !HAS_SAN(ctx)))
 196         /*
 197          * For KUR, copy subjectName from reference certificate.
 198          * For IR or CR, do the same only if there is no subjectAltName.
 199          */
 200         return X509_get_subject_name(refcert);
 201     return NULL;
 202 }
 203
 204 /*
 205  * Create CRMF certificate request message for IR/CR/KUR
 206  * returns a pointer to the OSSL_CRMF_MSG on success, NULL on error
 207  */
 208 static OSSL_CRMF_MSG *crm_new(OSSL_CMP_CTX *ctx, int bodytype, int rid)
 209 {
 210     OSSL_CRMF_MSG *crm = NULL;
 211     X509 *refcert = ctx->oldCert != NULL ? ctx->oldCert : ctx->clCert;
 212     /* refcert defaults to current client cert */
 213     EVP_PKEY *rkey = OSSL_CMP_CTX_get0_newPkey(ctx, 0);
 214     STACK_OF(GENERAL_NAME) *default_sans = NULL;
 215     X509_NAME *subject = determine_subj(ctx, refcert, bodytype);
 216     int crit = ctx->setSubjectAltNameCritical || subject == NULL;
 217     /* RFC5280: subjectAltName MUST be critical if subject is null */
 218     X509_EXTENSIONS *exts = NULL;
 219
 220     if (rkey == NULL)
 221         rkey = ctx->pkey; /* default is independent of ctx->oldClCert */
 222     if (rkey == NULL
 223             || (bodytype == OSSL_CMP_PKIBODY_KUR && refcert == NULL)) {
 224         CMPerr(0, CMP_R_INVALID_ARGS);
 225         return NULL;
 226     }
 227     if ((crm = OSSL_CRMF_MSG_new()) == NULL)
 228         return NULL;
 229     if (!OSSL_CRMF_MSG_set_certReqId(crm, rid)
 230             /*
 231              * fill certTemplate, corresponding to CertificationRequestInfo
 232              * of PKCS#10. The rkey param cannot be NULL so far -
 233              * it could be NULL if centralized key creation was supported
 234              */
 235             || !OSSL_CRMF_CERTTEMPLATE_fill(OSSL_CRMF_MSG_get0_tmpl(crm), rkey,
 236                                             subject, ctx->issuer,
 237                                             NULL /* serial */))
 238         goto err;
 239     if (ctx->days != 0) {
 240         time_t notBefore, notAfter;
 241
 242         notBefore = time(NULL);
 243         notAfter = notBefore + 60 * 60 * 24 * ctx->days;
 244         if (!OSSL_CRMF_MSG_set_validity(crm, notBefore, notAfter))
 245             goto err;
 246     }
 247
 248     /* extensions */
 249     if (refcert != NULL && !ctx->SubjectAltName_nodefault)
 250         default_sans = X509V3_get_d2i(X509_get0_extensions(refcert),
 251                                       NID_subject_alt_name, NULL, NULL);
 252     /* exts are copied from ctx to allow reuse */
 253     if (ctx->reqExtensions != NULL) {
 254         exts = sk_X509_EXTENSION_deep_copy(ctx->reqExtensions,
 255                                            X509_EXTENSION_dup,
 256                                            X509_EXTENSION_free);
 257         if (exts == NULL)
 258             goto err;
 259     }
 260     if (sk_GENERAL_NAME_num(ctx->subjectAltNames) > 0
 261             && !add1_extension(&exts, NID_subject_alt_name,
 262                                crit, ctx->subjectAltNames))
 263         goto err;
 264     if (!HAS_SAN(ctx) && default_sans != NULL
 265             && !add1_extension(&exts, NID_subject_alt_name, crit, default_sans))
 266         goto err;
 267     if (ctx->policies != NULL
 268             && !add1_extension(&exts, NID_certificate_policies,
 269                                ctx->setPoliciesCritical, ctx->policies))
 270         goto err;
 271     if (!OSSL_CRMF_MSG_set0_extensions(crm, exts))
 272         goto err;
 273     exts = NULL;
 274     /* end fill certTemplate, now set any controls */
 275
 276     /* for KUR, set OldCertId according to D.6 */
 277     if (bodytype == OSSL_CMP_PKIBODY_KUR) {
 278         OSSL_CRMF_CERTID *cid =
 279             OSSL_CRMF_CERTID_gen(X509_get_issuer_name(refcert),
 280                                  X509_get_serialNumber(refcert));
 281         int ret;
 282
 283         if (cid == NULL)
 284             goto err;
 285         ret = OSSL_CRMF_MSG_set1_regCtrl_oldCertID(crm, cid);
 286         OSSL_CRMF_CERTID_free(cid);
 287         if (ret == 0)
 288             goto err;
 289     }
 290
 291     goto end;
 292
 293  err:
 294     OSSL_CRMF_MSG_free(crm);
 295     crm = NULL;
 296
 297  end:
 298     sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
 299     sk_GENERAL_NAME_pop_free(default_sans, GENERAL_NAME_free);
 300     return crm;
 301 }
 302
 303 OSSL_CMP_MSG *ossl_cmp_certReq_new(OSSL_CMP_CTX *ctx, int type, int err_code)
 304 {
 305     OSSL_CMP_MSG *msg;
 306     OSSL_CRMF_MSG *crm = NULL;
 307
 308     if (!ossl_assert(ctx != NULL))
 309         return NULL;
 310
 311     if (type != OSSL_CMP_PKIBODY_IR && type != OSSL_CMP_PKIBODY_CR
 312             && type != OSSL_CMP_PKIBODY_KUR && type != OSSL_CMP_PKIBODY_P10CR) {
 313         CMPerr(0, CMP_R_INVALID_ARGS);
 314         return NULL;
 315     }
 316
 317     if ((msg = ossl_cmp_msg_create(ctx, type)) == NULL)
 318         goto err;
 319
 320     /* header */
 321     if (ctx->implicitConfirm && !ossl_cmp_hdr_set_implicitConfirm(msg->header))
 322         goto err;
 323
 324     /* body */
 325     /* For P10CR the content has already been set in OSSL_CMP_MSG_create */
 326     if (type != OSSL_CMP_PKIBODY_P10CR) {
 327         EVP_PKEY *privkey = OSSL_CMP_CTX_get0_newPkey(ctx, 1);
 328
 329         if (privkey == NULL)
 330             privkey = ctx->pkey; /* default is independent of ctx->oldCert */
 331         if (ctx->popoMethod == OSSL_CRMF_POPO_SIGNATURE && privkey == NULL) {
 332             CMPerr(0, CMP_R_MISSING_PRIVATE_KEY);
 333             goto err;
 334         }
 335         if ((crm = crm_new(ctx, type, OSSL_CMP_CERTREQID)) == NULL
 336             || !OSSL_CRMF_MSG_create_popo(crm, privkey, ctx->digest,
 337                                           ctx->popoMethod)
 338             /* value.ir is same for cr and kur */
 339             || !sk_OSSL_CRMF_MSG_push(msg->body->value.ir, crm))
 340             goto err;
 341         crm = NULL;
 342         /* TODO: here optional 2nd certreqmsg could be pushed to the stack */
 343     }
 344
 345     if (!ossl_cmp_msg_protect(ctx, msg))
 346         goto err;
 347
 348     return msg;
 349
 350  err:
 351     CMPerr(0, err_code);
 352     OSSL_CRMF_MSG_free(crm);
 353     OSSL_CMP_MSG_free(msg);
 354     return NULL;
 355 }
 356
 357 OSSL_CMP_MSG *ossl_cmp_certRep_new(OSSL_CMP_CTX *ctx, int bodytype,
 358                                    int certReqId, OSSL_CMP_PKISI *si,
 359                                    X509 *cert, STACK_OF(X509) *chain,
 360                                    STACK_OF(X509) *caPubs, int encrypted,
 361                                    int unprotectedErrors)
 362 {
 363     OSSL_CMP_MSG *msg = NULL;
 364     OSSL_CMP_CERTREPMESSAGE *repMsg = NULL;
 365     OSSL_CMP_CERTRESPONSE *resp = NULL;
 366     int status = -1;
 367
 368     if (!ossl_assert(ctx != NULL && si != NULL))
 369         return NULL;
 370
 371     if ((msg = ossl_cmp_msg_create(ctx, bodytype)) == NULL)
 372         goto err;
 373     repMsg = msg->body->value.ip; /* value.ip is same for cp and kup */
 374
 375     /* header */
 376     if (ctx->implicitConfirm && !ossl_cmp_hdr_set_implicitConfirm(msg->header))
 377         goto err;
 378
 379     /* body */
 380     if ((resp = OSSL_CMP_CERTRESPONSE_new()) == NULL)
 381         goto err;
 382     OSSL_CMP_PKISI_free(resp->status);
 383     if ((resp->status = OSSL_CMP_PKISI_dup(si)) == NULL
 384             || !ASN1_INTEGER_set(resp->certReqId, certReqId))
 385         goto err;
 386
 387     status = ossl_cmp_pkisi_get_status(resp->status);
 388     if (status != OSSL_CMP_PKISTATUS_rejection
 389             && status != OSSL_CMP_PKISTATUS_waiting && cert != NULL) {
 390         if (encrypted) {
 391             CMPerr(0, CMP_R_INVALID_ARGS);
 392             goto err;
 393         }
 394
 395         if ((resp->certifiedKeyPair = OSSL_CMP_CERTIFIEDKEYPAIR_new())
 396             == NULL)
 397             goto err;
 398         resp->certifiedKeyPair->certOrEncCert->type =
 399             OSSL_CMP_CERTORENCCERT_CERTIFICATE;
 400         if (!X509_up_ref(cert))
 401             goto err;
 402         resp->certifiedKeyPair->certOrEncCert->value.certificate = cert;
 403     }
 404
 405     if (!sk_OSSL_CMP_CERTRESPONSE_push(repMsg->response, resp))
 406         goto err;
 407     resp = NULL;
 408     /* TODO: here optional 2nd certrep could be pushed to the stack */
 409
 410     if (bodytype == OSSL_CMP_PKIBODY_IP && caPubs != NULL
 411             && (repMsg->caPubs = X509_chain_up_ref(caPubs)) == NULL)
 412         goto err;
 413     if (chain != NULL
 414             && !ossl_cmp_sk_X509_add1_certs(msg->extraCerts, chain, 0, 1, 0))
 415         goto err;
 416
 417     if (!unprotectedErrors
 418             || ossl_cmp_pkisi_get_status(si) != OSSL_CMP_PKISTATUS_rejection)
 419         if (!ossl_cmp_msg_protect(ctx, msg))
 420             goto err;
 421
 422     return msg;
 423
 424  err:
 425     CMPerr(0, CMP_R_ERROR_CREATING_CERTREP);
 426     OSSL_CMP_CERTRESPONSE_free(resp);
 427     OSSL_CMP_MSG_free(msg);
 428     return NULL;
 429 }
 430
 431 OSSL_CMP_MSG *ossl_cmp_rr_new(OSSL_CMP_CTX *ctx)
 432 {
 433     OSSL_CMP_MSG *msg = NULL;
 434     OSSL_CMP_REVDETAILS *rd;
 435
 436     if (!ossl_assert(ctx != NULL && ctx->oldCert != NULL))
 437         return NULL;
 438
 439     if ((rd = OSSL_CMP_REVDETAILS_new()) == NULL)
 440         goto err;
 441
 442     /* Fill the template from the contents of the certificate to be revoked */
 443     if (!OSSL_CRMF_CERTTEMPLATE_fill(rd->certDetails,
 444                                      NULL /* pubkey would be redundant */,
 445                                      NULL /* subject would be redundant */,
 446                                      X509_get_issuer_name(ctx->oldCert),
 447                                      X509_get_serialNumber(ctx->oldCert)))
 448         goto err;
 449
 450     /* revocation reason code is optional */
 451     if (ctx->revocationReason != CRL_REASON_NONE
 452             && !add_crl_reason_extension(&rd->crlEntryDetails,
 453                                          ctx->revocationReason))
 454         goto err;
 455
 456     if ((msg = ossl_cmp_msg_create(ctx, OSSL_CMP_PKIBODY_RR)) == NULL)
 457         goto err;
 458
 459     if (!sk_OSSL_CMP_REVDETAILS_push(msg->body->value.rr, rd))
 460         goto err;
 461     rd = NULL;
 462
 463     /*
 464      * TODO: the Revocation Passphrase according to section 5.3.19.9 could be
 465      *       set here if set in ctx
 466      */
 467
 468     if (!ossl_cmp_msg_protect(ctx, msg))
 469         goto err;
 470
 471     return msg;
 472
 473  err:
 474     CMPerr(0, CMP_R_ERROR_CREATING_RR);
 475     OSSL_CMP_MSG_free(msg);
 476     OSSL_CMP_REVDETAILS_free(rd);
 477     return NULL;
 478 }
 479
 480 OSSL_CMP_MSG *ossl_cmp_rp_new(OSSL_CMP_CTX *ctx, OSSL_CMP_PKISI *si,
 481                               OSSL_CRMF_CERTID *cid, int unprot_err)
 482 {
 483     OSSL_CMP_REVREPCONTENT *rep = NULL;
 484     OSSL_CMP_PKISI *si1 = NULL;
 485     OSSL_CRMF_CERTID *cid_copy = NULL;
 486     OSSL_CMP_MSG *msg = NULL;
 487
 488     if (!ossl_assert(ctx != NULL && si != NULL && cid != NULL))
 489         return NULL;
 490
 491     if ((msg = ossl_cmp_msg_create(ctx, OSSL_CMP_PKIBODY_RP)) == NULL)
 492         goto err;
 493     rep = msg->body->value.rp;
 494
 495     if ((si1 = OSSL_CMP_PKISI_dup(si)) == NULL)
 496         goto err;
 497
 498     if (!sk_OSSL_CMP_PKISI_push(rep->status, si1)) {
 499         OSSL_CMP_PKISI_free(si1);
 500         goto err;
 501     }
 502
 503     if ((rep->revCerts = sk_OSSL_CRMF_CERTID_new_null()) == NULL)
 504         goto err;
 505     if ((cid_copy = OSSL_CRMF_CERTID_dup(cid)) == NULL)
 506         goto err;
 507     if (!sk_OSSL_CRMF_CERTID_push(rep->revCerts, cid_copy)) {
 508         OSSL_CRMF_CERTID_free(cid_copy);
 509         goto err;
 510     }
 511
 512     if (!unprot_err
 513             || ossl_cmp_pkisi_get_status(si) != OSSL_CMP_PKISTATUS_rejection)
 514         if (!ossl_cmp_msg_protect(ctx, msg))
 515             goto err;
 516
 517     return msg;
 518
 519  err:
 520     CMPerr(0, CMP_R_ERROR_CREATING_RP);
 521     OSSL_CMP_MSG_free(msg);
 522     return NULL;
 523 }
 524
 525 OSSL_CMP_MSG *ossl_cmp_pkiconf_new(OSSL_CMP_CTX *ctx)
 526 {
 527     OSSL_CMP_MSG *msg;
 528
 529     if (!ossl_assert(ctx != NULL))
 530         return NULL;
 531
 532     if ((msg = ossl_cmp_msg_create(ctx, OSSL_CMP_PKIBODY_PKICONF)) == NULL)
 533         goto err;
 534     if (ossl_cmp_msg_protect(ctx, msg))
 535         return msg;
 536
 537  err:
 538     CMPerr(0, CMP_R_ERROR_CREATING_PKICONF);
 539     OSSL_CMP_MSG_free(msg);
 540     return NULL;
 541 }
 542
 543 int ossl_cmp_msg_gen_push0_ITAV(OSSL_CMP_MSG *msg, OSSL_CMP_ITAV *itav)
 544 {
 545     int bodytype;
 546
 547     if (!ossl_assert(msg != NULL && itav != NULL))
 548         return 0;
 549
 550     bodytype = ossl_cmp_msg_get_bodytype(msg);
 551     if (bodytype != OSSL_CMP_PKIBODY_GENM
 552             && bodytype != OSSL_CMP_PKIBODY_GENP) {
 553         CMPerr(0, CMP_R_INVALID_ARGS);
 554         return 0;
 555     }
 556
 557     /* value.genp has the same structure, so this works for genp as well */
 558     return OSSL_CMP_ITAV_push0_stack_item(&msg->body->value.genm, itav);
 559 }
 560
 561 int ossl_cmp_msg_gen_push1_ITAVs(OSSL_CMP_MSG *msg,
 562                                  const STACK_OF(OSSL_CMP_ITAV) *itavs)
 563 {
 564     int i;
 565     OSSL_CMP_ITAV *itav = NULL;
 566
 567     if (!ossl_assert(msg != NULL))
 568         return 0;
 569
 570     for (i = 0; i < sk_OSSL_CMP_ITAV_num(itavs); i++) {
 571         if ((itav = OSSL_CMP_ITAV_dup(sk_OSSL_CMP_ITAV_value(itavs, i))) == NULL)
 572             return 0;
 573         if (!ossl_cmp_msg_gen_push0_ITAV(msg, itav)) {
 574             OSSL_CMP_ITAV_free(itav);
 575             return 0;
 576         }
 577     }
 578     return 1;
 579 }
 580
 581 /*
 582  * Creates a new General Message/Response with an empty itav stack
 583  * returns a pointer to the PKIMessage on success, NULL on error
 584  */
 585 static OSSL_CMP_MSG *gen_new(OSSL_CMP_CTX *ctx,
 586                              const STACK_OF(OSSL_CMP_ITAV) *itavs,
 587                              int body_type, int err_code)
 588 {
 589     OSSL_CMP_MSG *msg = NULL;
 590
 591     if (!ossl_assert(ctx != NULL))
 592         return NULL;
 593
 594     if ((msg = ossl_cmp_msg_create(ctx, body_type)) == NULL)
 595         return NULL;
 596
 597     if (ctx->genm_ITAVs != NULL
 598             && !ossl_cmp_msg_gen_push1_ITAVs(msg, itavs))
 599         goto err;
 600
 601     if (!ossl_cmp_msg_protect(ctx, msg))
 602         goto err;
 603
 604     return msg;
 605
 606  err:
 607     CMPerr(0, err_code);
 608     OSSL_CMP_MSG_free(msg);
 609     return NULL;
 610 }
 611
 612 OSSL_CMP_MSG *ossl_cmp_genm_new(OSSL_CMP_CTX *ctx)
 613 {
 614     return gen_new(ctx, ctx->genm_ITAVs,
 615                    OSSL_CMP_PKIBODY_GENM, CMP_R_ERROR_CREATING_GENM);
 616 }
 617
 618 OSSL_CMP_MSG *ossl_cmp_genp_new(OSSL_CMP_CTX *ctx,
 619                                 const STACK_OF(OSSL_CMP_ITAV) *itavs)
 620 {
 621     return gen_new(ctx, itavs,
 622                    OSSL_CMP_PKIBODY_GENP, CMP_R_ERROR_CREATING_GENP);
 623 }
 624
 625 OSSL_CMP_MSG *ossl_cmp_error_new(OSSL_CMP_CTX *ctx, OSSL_CMP_PKISI *si,
 626                                  int errorCode,
 627                                  const char *details, int unprotected)
 628 {
 629     OSSL_CMP_MSG *msg = NULL;
 630     OSSL_CMP_PKIFREETEXT *ft;
 631
 632     if (!ossl_assert(ctx != NULL && si != NULL))
 633         return NULL;
 634
 635     if ((msg = ossl_cmp_msg_create(ctx, OSSL_CMP_PKIBODY_ERROR)) == NULL)
 636         goto err;
 637
 638     OSSL_CMP_PKISI_free(msg->body->value.error->pKIStatusInfo);
 639     if ((msg->body->value.error->pKIStatusInfo = OSSL_CMP_PKISI_dup(si))
 640         == NULL)
 641         goto err;
 642     if (errorCode >= 0) {
 643         if ((msg->body->value.error->errorCode = ASN1_INTEGER_new()) == NULL)
 644             goto err;
 645         if (!ASN1_INTEGER_set(msg->body->value.error->errorCode, errorCode))
 646             goto err;
 647     }
 648     if (details != NULL) {
 649         if ((ft = sk_ASN1_UTF8STRING_new_null()) == NULL)
 650             goto err;
 651         msg->body->value.error->errorDetails = ft;
 652         if (!ossl_cmp_sk_ASN1_UTF8STRING_push_str(ft, details))
 653             goto err;
 654     }
 655
 656     if (!unprotected && !ossl_cmp_msg_protect(ctx, msg))
 657         goto err;
 658     return msg;
 659
 660  err:
 661     CMPerr(0, CMP_R_ERROR_CREATING_ERROR);
 662     OSSL_CMP_MSG_free(msg);
 663     return NULL;
 664 }
 665
 666 /*
 667  * Set the certHash field of a OSSL_CMP_CERTSTATUS structure.
 668  * This is used in the certConf message, for example,
 669  * to confirm that the certificate was received successfully.
 670  */
 671 int ossl_cmp_certstatus_set0_certHash(OSSL_CMP_CERTSTATUS *certStatus,
 672                                       ASN1_OCTET_STRING *hash)
 673 {
 674     if (!ossl_assert(certStatus != NULL))
 675         return 0;
 676     ASN1_OCTET_STRING_free(certStatus->certHash);
 677     certStatus->certHash = hash;
 678     return 1;
 679 }
 680
 681 /*
 682  * TODO: handle potential 2nd certificate when signing and encrypting
 683  * certificates have been requested/received
 684  */
 685 OSSL_CMP_MSG *ossl_cmp_certConf_new(OSSL_CMP_CTX *ctx, int fail_info,
 686                                     const char *text)
 687 {
 688     OSSL_CMP_MSG *msg = NULL;
 689     OSSL_CMP_CERTSTATUS *certStatus = NULL;
 690     ASN1_OCTET_STRING *certHash = NULL;
 691     OSSL_CMP_PKISI *sinfo;
 692
 693     if (!ossl_assert(ctx != NULL && ctx->newCert != NULL))
 694         return NULL;
 695
 696     if ((unsigned)fail_info > OSSL_CMP_PKIFAILUREINFO_MAX_BIT_PATTERN) {
 697         CMPerr(0, CMP_R_FAIL_INFO_OUT_OF_RANGE);
 698         return NULL;
 699     }
 700
 701     if ((msg = ossl_cmp_msg_create(ctx, OSSL_CMP_PKIBODY_CERTCONF)) == NULL)
 702         goto err;
 703
 704     if ((certStatus = OSSL_CMP_CERTSTATUS_new()) == NULL)
 705         goto err;
 706     /* consume certStatus into msg right away so it gets deallocated with msg */
 707     if (!sk_OSSL_CMP_CERTSTATUS_push(msg->body->value.certConf, certStatus))
 708         goto err;
 709     /* set the ID of the certReq */
 710     if (!ASN1_INTEGER_set(certStatus->certReqId, OSSL_CMP_CERTREQID))
 711         goto err;
 712     /*
 713      * the hash of the certificate, using the same hash algorithm
 714      * as is used to create and verify the certificate signature
 715      */
 716     if ((certHash = X509_digest_sig(ctx->newCert)) == NULL)
 717         goto err;
 718
 719     if (!ossl_cmp_certstatus_set0_certHash(certStatus, certHash))
 720         goto err;
 721     certHash = NULL;
 722     /*
 723      * For any particular CertStatus, omission of the statusInfo field
 724      * indicates ACCEPTANCE of the specified certificate.  Alternatively,
 725      * explicit status details (with respect to acceptance or rejection) MAY
 726      * be provided in the statusInfo field, perhaps for auditing purposes at
 727      * the CA/RA.
 728      */
 729     sinfo = fail_info != 0 ?
 730         OSSL_CMP_STATUSINFO_new(OSSL_CMP_PKISTATUS_rejection, fail_info, text) :
 731         OSSL_CMP_STATUSINFO_new(OSSL_CMP_PKISTATUS_accepted, 0, text);
 732     if (sinfo == NULL)
 733         goto err;
 734     certStatus->statusInfo = sinfo;
 735
 736     if (!ossl_cmp_msg_protect(ctx, msg))
 737         goto err;
 738
 739     return msg;
 740
 741  err:
 742     CMPerr(0, CMP_R_ERROR_CREATING_CERTCONF);
 743     OSSL_CMP_MSG_free(msg);
 744     ASN1_OCTET_STRING_free(certHash);
 745     return NULL;
 746 }
 747
 748 OSSL_CMP_MSG *ossl_cmp_pollReq_new(OSSL_CMP_CTX *ctx, int crid)
 749 {
 750     OSSL_CMP_MSG *msg = NULL;
 751     OSSL_CMP_POLLREQ *preq = NULL;
 752
 753     if (!ossl_assert(ctx != NULL))
 754         return NULL;
 755
 756     if ((msg = ossl_cmp_msg_create(ctx, OSSL_CMP_PKIBODY_POLLREQ)) == NULL)
 757         goto err;
 758
 759     /* TODO: support multiple cert request IDs to poll */
 760     if ((preq = OSSL_CMP_POLLREQ_new()) == NULL
 761             || !ASN1_INTEGER_set(preq->certReqId, crid)
 762             || !sk_OSSL_CMP_POLLREQ_push(msg->body->value.pollReq, preq))
 763         goto err;
 764
 765     preq = NULL;
 766     if (!ossl_cmp_msg_protect(ctx, msg))
 767         goto err;
 768
 769     return msg;
 770
 771  err:
 772     CMPerr(0, CMP_R_ERROR_CREATING_POLLREQ);
 773     OSSL_CMP_POLLREQ_free(preq);
 774     OSSL_CMP_MSG_free(msg);
 775     return NULL;
 776 }
 777
 778 OSSL_CMP_MSG *ossl_cmp_pollRep_new(OSSL_CMP_CTX *ctx, int crid,
 779                                    int64_t poll_after)
 780 {
 781     OSSL_CMP_MSG *msg;
 782     OSSL_CMP_POLLREP *prep;
 783
 784     if (!ossl_assert(ctx != NULL))
 785         return NULL;
 786
 787     if ((msg = ossl_cmp_msg_create(ctx, OSSL_CMP_PKIBODY_POLLREP)) == NULL)
 788         goto err;
 789     if ((prep = OSSL_CMP_POLLREP_new()) == NULL)
 790         goto err;
 791     if (!sk_OSSL_CMP_POLLREP_push(msg->body->value.pollRep, prep))
 792         goto err;
 793     if (!ASN1_INTEGER_set(prep->certReqId, crid))
 794         goto err;
 795     if (!ASN1_INTEGER_set_int64(prep->checkAfter, poll_after))
 796         goto err;
 797
 798     if (!ossl_cmp_msg_protect(ctx, msg))
 799         goto err;
 800     return msg;
 801
 802  err:
 803     CMPerr(0, CMP_R_ERROR_CREATING_POLLREP);
 804     OSSL_CMP_MSG_free(msg);
 805     return NULL;
 806 }
 807
 808 /*-
 809  * returns the status field of the RevRepContent with the given
 810  * request/sequence id inside a revocation response.
 811  * RevRepContent has the revocation statuses in same order as they were sent in
 812  * RevReqContent.
 813  * returns NULL on error
 814  */
 815 OSSL_CMP_PKISI *
 816 ossl_cmp_revrepcontent_get_pkisi(OSSL_CMP_REVREPCONTENT *rrep, int rsid)
 817 {
 818     OSSL_CMP_PKISI *status;
 819
 820     if (!ossl_assert(rrep != NULL))
 821         return NULL;
 822
 823     if ((status = sk_OSSL_CMP_PKISI_value(rrep->status, rsid)) != NULL)
 824         return status;
 825
 826     CMPerr(0, CMP_R_PKISTATUSINFO_NOT_FOUND);
 827     return NULL;
 828 }
 829
 830 /*
 831  * returns the CertId field in the revCerts part of the RevRepContent
 832  * with the given request/sequence id inside a revocation response.
 833  * RevRepContent has the CertIds in same order as they were sent in
 834  * RevReqContent.
 835  * returns NULL on error
 836  */
 837 OSSL_CRMF_CERTID *
 838 ossl_cmp_revrepcontent_get_CertId(OSSL_CMP_REVREPCONTENT *rrep, int rsid)
 839 {
 840     OSSL_CRMF_CERTID *cid = NULL;
 841
 842     if (!ossl_assert(rrep != NULL))
 843         return NULL;
 844
 845     if ((cid = sk_OSSL_CRMF_CERTID_value(rrep->revCerts, rsid)) != NULL)
 846         return cid;
 847
 848     CMPerr(0, CMP_R_CERTID_NOT_FOUND);
 849     return NULL;
 850 }
 851
 852 static int suitable_rid(const ASN1_INTEGER *certReqId, int rid)
 853 {
 854     int trid;
 855
 856     if (rid == -1)
 857         return 1;
 858
 859     trid = ossl_cmp_asn1_get_int(certReqId);
 860
 861     if (trid == -1) {
 862         CMPerr(0, CMP_R_BAD_REQUEST_ID);
 863         return 0;
 864     }
 865     return rid == trid;
 866 }
 867
 868 static void add_expected_rid(int rid)
 869 {
 870     char str[DECIMAL_SIZE(rid) + 1];
 871
 872     BIO_snprintf(str, sizeof(str), "%d", rid);
 873     ERR_add_error_data(2, "expected certReqId = ", str);
 874 }
 875
 876 /*
 877  * returns a pointer to the PollResponse with the given CertReqId
 878  * (or the first one in case -1) inside a PollRepContent
 879  * returns NULL on error or if no suitable PollResponse available
 880  */
 881 OSSL_CMP_POLLREP *
 882 ossl_cmp_pollrepcontent_get0_pollrep(const OSSL_CMP_POLLREPCONTENT *prc,
 883                                      int rid)
 884 {
 885     OSSL_CMP_POLLREP *pollRep = NULL;
 886     int i;
 887
 888     if (!ossl_assert(prc != NULL))
 889         return NULL;
 890
 891     for (i = 0; i < sk_OSSL_CMP_POLLREP_num(prc); i++) {
 892         pollRep = sk_OSSL_CMP_POLLREP_value(prc, i);
 893         if (suitable_rid(pollRep->certReqId, rid))
 894             return pollRep;
 895     }
 896
 897     CMPerr(0, CMP_R_CERTRESPONSE_NOT_FOUND);
 898     add_expected_rid(rid);
 899     return NULL;
 900 }
 901
 902 /*
 903  * returns a pointer to the CertResponse with the given CertReqId
 904  * (or the first one in case -1) inside a CertRepMessage
 905  * returns NULL on error or if no suitable CertResponse available
 906  */
 907 OSSL_CMP_CERTRESPONSE *
 908 ossl_cmp_certrepmessage_get0_certresponse(const OSSL_CMP_CERTREPMESSAGE *crm,
 909                                           int rid)
 910 {
 911     OSSL_CMP_CERTRESPONSE *crep = NULL;
 912     int i;
 913
 914     if (!ossl_assert(crm != NULL && crm->response != NULL))
 915         return NULL;
 916
 917     for (i = 0; i < sk_OSSL_CMP_CERTRESPONSE_num(crm->response); i++) {
 918         crep = sk_OSSL_CMP_CERTRESPONSE_value(crm->response, i);
 919         if (suitable_rid(crep->certReqId, rid))
 920             return crep;
 921     }
 922
 923     CMPerr(0, CMP_R_CERTRESPONSE_NOT_FOUND);
 924     add_expected_rid(rid);
 925     return NULL;
 926 }
 927
 928 /*
 929  * CMP_CERTRESPONSE_get1_certificate() attempts to retrieve the returned
 930  * certificate from the given certResponse B<crep>.
 931  * Uses the privkey in case of indirect POP from B<ctx>.
 932  * Returns a pointer to a copy of the found certificate, or NULL if not found.
 933  */
 934 X509 *ossl_cmp_certresponse_get1_certificate(EVP_PKEY *privkey,
 935                                              const OSSL_CMP_CERTRESPONSE *crep)
 936 {
 937     OSSL_CMP_CERTORENCCERT *coec;
 938     X509 *crt = NULL;
 939
 940     if (!ossl_assert(crep != NULL))
 941         return NULL;
 942
 943     if (crep->certifiedKeyPair
 944             && (coec = crep->certifiedKeyPair->certOrEncCert) != NULL) {
 945         switch (coec->type) {
 946         case OSSL_CMP_CERTORENCCERT_CERTIFICATE:
 947             crt = X509_dup(coec->value.certificate);
 948             break;
 949         case OSSL_CMP_CERTORENCCERT_ENCRYPTEDCERT:
 950             /* cert encrypted for indirect PoP; RFC 4210, 5.2.8.2 */
 951             if (privkey == NULL) {
 952                 CMPerr(0, CMP_R_MISSING_PRIVATE_KEY);
 953                 return NULL;
 954             }
 955             crt =
 956                 OSSL_CRMF_ENCRYPTEDVALUE_get1_encCert(coec->value.encryptedCert,
 957                                                       privkey);
 958             break;
 959         default:
 960             CMPerr(0, CMP_R_UNKNOWN_CERT_TYPE);
 961             return NULL;
 962         }
 963     }
 964     if (crt == NULL)
 965         CMPerr(0, CMP_R_CERTIFICATE_NOT_FOUND);
 966     return crt;
 967 }
 968
 969 OSSL_CMP_MSG *ossl_cmp_msg_load(const char *file)
 970 {
 971     OSSL_CMP_MSG *msg = NULL;
 972     BIO *bio = NULL;
 973
 974     if (!ossl_assert(file != NULL))
 975         return NULL;
 976
 977     if ((bio = BIO_new_file(file, "rb")) == NULL)
 978         return NULL;
 979     msg = OSSL_d2i_CMP_MSG_bio(bio, NULL);
 980     BIO_free(bio);
 981     return msg;
 982 }
 983
 984 OSSL_CMP_MSG *OSSL_d2i_CMP_MSG_bio(BIO *bio, OSSL_CMP_MSG **msg)
 985 {
 986     return ASN1_d2i_bio_of(OSSL_CMP_MSG, OSSL_CMP_MSG_new,
 987                            d2i_OSSL_CMP_MSG, bio, msg);
 988 }
 989
 990 int OSSL_i2d_CMP_MSG_bio(BIO *bio, const OSSL_CMP_MSG *msg)
 991 {
 992     return ASN1_i2d_bio_of(OSSL_CMP_MSG, i2d_OSSL_CMP_MSG, bio, msg);
 993 }