| /* |
| * Copyright 2007-2020 The OpenSSL Project Authors. All Rights Reserved. |
| * Copyright Nokia 2007-2019 |
| * Copyright Siemens AG 2015-2019 |
| * |
| * Licensed under the Apache License 2.0 (the "License"). You may not use |
| * this file except in compliance with the License. You can obtain a copy |
| * in the file LICENSE in the source distribution or at |
| * https://www.openssl.org/source/license.html |
| */ |
| |
| #include "cmp_local.h" |
| #include "internal/cryptlib.h" |
| |
| /* explicit #includes not strictly needed since implied by the above: */ |
| #include <openssl/bio.h> |
| #include <openssl/cmp.h> |
| #include <openssl/err.h> |
| #include <openssl/evp.h> |
| #include <openssl/x509v3.h> |
| |
| #include "openssl/cmp_util.h" |
| |
| DEFINE_STACK_OF(ASN1_UTF8STRING) |
| DEFINE_STACK_OF(OSSL_CMP_CERTRESPONSE) |
| DEFINE_STACK_OF(OSSL_CMP_PKISI) |
| DEFINE_STACK_OF(OSSL_CRMF_CERTID) |
| |
| #define IS_CREP(t) ((t) == OSSL_CMP_PKIBODY_IP || (t) == OSSL_CMP_PKIBODY_CP \ |
| || (t) == OSSL_CMP_PKIBODY_KUP) |
| |
| /*- |
| * Evaluate whether there's an exception (violating the standard) configured for |
| * handling negative responses without protection or with invalid protection. |
| * Returns 1 on acceptance, 0 on rejection, or -1 on (internal) error. |
| */ |
| static int unprotected_exception(const OSSL_CMP_CTX *ctx, |
| const OSSL_CMP_MSG *rep, |
| int invalid_protection, |
| int expected_type /* ignored here */) |
| { |
| int rcvd_type = ossl_cmp_msg_get_bodytype(rep /* may be NULL */); |
| const char *msg_type = NULL; |
| |
| if (!ossl_assert(ctx != NULL && rep != NULL)) |
| return -1; |
| |
| if (!ctx->unprotectedErrors) |
| return 0; |
| |
| switch (rcvd_type) { |
| case OSSL_CMP_PKIBODY_ERROR: |
| msg_type = "error response"; |
| break; |
| case OSSL_CMP_PKIBODY_RP: |
| { |
| OSSL_CMP_PKISI *si = |
| ossl_cmp_revrepcontent_get_pkisi(rep->body->value.rp, |
| OSSL_CMP_REVREQSID); |
| |
| if (si == NULL) |
| return -1; |
| if (ossl_cmp_pkisi_get_status(si) == OSSL_CMP_PKISTATUS_rejection) |
| msg_type = "revocation response message with rejection status"; |
| break; |
| } |
| case OSSL_CMP_PKIBODY_PKICONF: |
| msg_type = "PKI Confirmation message"; |
| break; |
| default: |
| if (IS_CREP(rcvd_type)) { |
| OSSL_CMP_CERTREPMESSAGE *crepmsg = rep->body->value.ip; |
| OSSL_CMP_CERTRESPONSE *crep = |
| ossl_cmp_certrepmessage_get0_certresponse(crepmsg, |
| -1 /* any rid */); |
| |
| if (sk_OSSL_CMP_CERTRESPONSE_num(crepmsg->response) > 1) |
| return -1; |
| /* TODO: handle potentially multiple CertResponses in CertRepMsg */ |
| if (crep == NULL) |
| return -1; |
| if (ossl_cmp_pkisi_get_status(crep->status) |
| == OSSL_CMP_PKISTATUS_rejection) |
| msg_type = "CertRepMessage with rejection status"; |
| } |
| } |
| if (msg_type == NULL) |
| return 0; |
| ossl_cmp_log2(WARN, ctx, "ignoring %s protection of %s", |
| invalid_protection ? "invalid" : "missing", msg_type); |
| return 1; |
| } |
| |
| |
| /* Save error info from PKIStatusInfo field of a certresponse into ctx */ |
| static int save_statusInfo(OSSL_CMP_CTX *ctx, OSSL_CMP_PKISI *si) |
| { |
| int i; |
| OSSL_CMP_PKIFREETEXT *ss; |
| |
| if (!ossl_assert(ctx != NULL && si != NULL)) |
| return 0; |
| |
| if ((ctx->status = ossl_cmp_pkisi_get_status(si)) < 0) |
| return 0; |
| |
| ctx->failInfoCode = 0; |
| if (si->failInfo != NULL) { |
| for (i = 0; i <= OSSL_CMP_PKIFAILUREINFO_MAX; i++) { |
| if (ASN1_BIT_STRING_get_bit(si->failInfo, i)) |
| ctx->failInfoCode |= (1 << i); |
| } |
| } |
| |
| if (!ossl_cmp_ctx_set0_statusString(ctx, sk_ASN1_UTF8STRING_new_null()) |
| || (ctx->statusString == NULL)) |
| return 0; |
| |
| ss = si->statusString; /* may be NULL */ |
| for (i = 0; i < sk_ASN1_UTF8STRING_num(ss); i++) { |
| ASN1_UTF8STRING *str = sk_ASN1_UTF8STRING_value(ss, i); |
| |
| if (!sk_ASN1_UTF8STRING_push(ctx->statusString, ASN1_STRING_dup(str))) |
| return 0; |
| } |
| return 1; |
| } |
| |
| /*- |
| * Perform the generic aspects of sending a request and receiving a response. |
| * Returns 1 on success and provides the received PKIMESSAGE in *rep. |
| * Returns 0 on error. |
| * Regardless of success, caller is responsible for freeing *rep (unless NULL). |
| */ |
| static int send_receive_check(OSSL_CMP_CTX *ctx, const OSSL_CMP_MSG *req, |
| OSSL_CMP_MSG **rep, int expected_type) |
| { |
| const char *req_type_str = |
| ossl_cmp_bodytype_to_string(ossl_cmp_msg_get_bodytype(req)); |
| const char *expected_type_str = ossl_cmp_bodytype_to_string(expected_type); |
| int msg_timeout; |
| int bt; |
| time_t now = time(NULL); |
| int time_left; |
| OSSL_CMP_transfer_cb_t transfer_cb = ctx->transfer_cb; |
| |
| if (transfer_cb == NULL) |
| transfer_cb = OSSL_CMP_MSG_http_perform; |
| |
| *rep = NULL; |
| msg_timeout = ctx->msg_timeout; /* backup original value */ |
| if ((IS_CREP(expected_type) || expected_type == OSSL_CMP_PKIBODY_POLLREP) |
| && ctx->total_timeout > 0 /* timeout is not infinite */) { |
| if (now >= ctx->end_time) { |
| CMPerr(0, CMP_R_TOTAL_TIMEOUT); |
| return 0; |
| } |
| if (!ossl_assert(ctx->end_time - time(NULL) < INT_MAX)) { |
| /* cannot really happen due to the assignment in do_certreq_seq() */ |
| CMPerr(0, CMP_R_INVALID_ARGS); |
| return 0; |
| } |
| time_left = (int)(ctx->end_time - now); |
| if (ctx->msg_timeout == 0 || time_left < ctx->msg_timeout) |
| ctx->msg_timeout = time_left; |
| } |
| |
| /* should print error queue since transfer_cb may call ERR_clear_error() */ |
| OSSL_CMP_CTX_print_errors(ctx); |
| |
| ossl_cmp_log1(INFO, ctx, "sending %s", req_type_str); |
| |
| *rep = (*transfer_cb)(ctx, req); |
| ctx->msg_timeout = msg_timeout; /* restore original value */ |
| |
| if (*rep == NULL) { |
| CMPerr(0, CMP_R_TRANSFER_ERROR); /* or receiving response */ |
| ERR_add_error_data(2, "request sent: ", req_type_str); |
| ERR_add_error_data(2, ", expected response: ", expected_type_str); |
| return 0; |
| } |
| |
| bt = ossl_cmp_msg_get_bodytype(*rep); |
| /* |
| * The body type in the 'bt' variable is not yet verified. |
| * Still we use this preliminary value already for a progress report because |
| * the following msg verification may also produce log entries and may fail. |
| */ |
| ossl_cmp_log1(INFO, ctx, "received %s", ossl_cmp_bodytype_to_string(bt)); |
| |
| /* copy received extraCerts to ctx->extraCertsIn so they can be retrieved */ |
| if (bt != OSSL_CMP_PKIBODY_POLLREP && bt != OSSL_CMP_PKIBODY_PKICONF |
| && !ossl_cmp_ctx_set1_extraCertsIn(ctx, (*rep)->extraCerts)) |
| return 0; |
| |
| if (!ossl_cmp_msg_check_update(ctx, *rep, unprotected_exception, |
| expected_type)) |
| return 0; |
| |
| if (bt == expected_type |
| /* as an answer to polling, there could be IP/CP/KUP: */ |
| || (IS_CREP(bt) && expected_type == OSSL_CMP_PKIBODY_POLLREP)) |
| return 1; |
| |
| /* received message type is not one of the expected ones (e.g., error) */ |
| CMPerr(0, bt == OSSL_CMP_PKIBODY_ERROR ? CMP_R_RECEIVED_ERROR : |
| CMP_R_UNEXPECTED_PKIBODY); /* in next line for mkerr.pl */ |
| |
| if (bt != OSSL_CMP_PKIBODY_ERROR) { |
| ERR_add_error_data(3, "message type is '", |
| ossl_cmp_bodytype_to_string(bt), "'"); |
| } else { |
| OSSL_CMP_ERRORMSGCONTENT *emc = (*rep)->body->value.error; |
| OSSL_CMP_PKISI *si = emc->pKIStatusInfo; |
| char buf[OSSL_CMP_PKISI_BUFLEN]; |
| |
| if (save_statusInfo(ctx, si) |
| && OSSL_CMP_CTX_snprint_PKIStatus(ctx, buf, |
| sizeof(buf)) != NULL) |
| ERR_add_error_data(1, buf); |
| if (emc->errorCode != NULL |
| && BIO_snprintf(buf, sizeof(buf), "; errorCode: %ld", |
| ASN1_INTEGER_get(emc->errorCode)) > 0) |
| ERR_add_error_data(1, buf); |
| if (emc->errorDetails != NULL) { |
| char *text = sk_ASN1_UTF8STRING2text(emc->errorDetails, ", ", |
| OSSL_CMP_PKISI_BUFLEN - 1); |
| |
| if (text != NULL) |
| ERR_add_error_data(2, "; errorDetails: ", text); |
| OPENSSL_free(text); |
| } |
| if (ctx->status != OSSL_CMP_PKISTATUS_rejection) { |
| CMPerr(0, CMP_R_UNEXPECTED_PKISTATUS); |
| if (ctx->status == OSSL_CMP_PKISTATUS_waiting) |
| ctx->status = OSSL_CMP_PKISTATUS_rejection; |
| } |
| } |
| return 0; |
| } |
| |
| /*- |
| * When a 'waiting' PKIStatus has been received, this function is used to |
| * poll, which should yield a pollRep or finally a CertRepMessage in ip/cp/kup. |
| * On receiving a pollRep, which includes a checkAfter value, it return this |
| * value if sleep == 0, else it sleeps as long as indicated and retries. |
| * |
| * A transaction timeout is enabled if ctx->total_timeout is > 0. |
| * In this case polling will continue until the timeout is reached and then |
| * polling is done a last time even if this is before the "checkAfter" time. |
| * |
| * Returns -1 on receiving pollRep if sleep == 0, setting the checkAfter value. |
| * Returns 1 on success and provides the received PKIMESSAGE in *rep. |
| * In this case the caller is responsible for freeing *rep. |
| * Returns 0 on error (which includes the case that timeout has been reached). |
| */ |
| static int poll_for_response(OSSL_CMP_CTX *ctx, int sleep, int rid, |
| OSSL_CMP_MSG **rep, int *checkAfter) |
| { |
| OSSL_CMP_MSG *preq = NULL; |
| OSSL_CMP_MSG *prep = NULL; |
| |
| ossl_cmp_info(ctx, |
| "received 'waiting' PKIStatus, starting to poll for response"); |
| *rep = NULL; |
| for (;;) { |
| /* TODO: handle potentially multiple poll requests per message */ |
| if ((preq = ossl_cmp_pollReq_new(ctx, rid)) == NULL) |
| goto err; |
| |
| if (!send_receive_check(ctx, preq, &prep, OSSL_CMP_PKIBODY_POLLREP)) |
| goto err; |
| |
| /* handle potential pollRep */ |
| if (ossl_cmp_msg_get_bodytype(prep) == OSSL_CMP_PKIBODY_POLLREP) { |
| OSSL_CMP_POLLREPCONTENT *prc = prep->body->value.pollRep; |
| OSSL_CMP_POLLREP *pollRep = NULL; |
| int64_t check_after; |
| char str[OSSL_CMP_PKISI_BUFLEN]; |
| int len; |
| |
| /* TODO: handle potentially multiple elements in pollRep */ |
| if (sk_OSSL_CMP_POLLREP_num(prc) > 1) { |
| CMPerr(0, CMP_R_MULTIPLE_RESPONSES_NOT_SUPPORTED); |
| goto err; |
| } |
| pollRep = ossl_cmp_pollrepcontent_get0_pollrep(prc, rid); |
| if (pollRep == NULL) |
| goto err; |
| |
| if (!ASN1_INTEGER_get_int64(&check_after, pollRep->checkAfter)) { |
| CMPerr(0, CMP_R_BAD_CHECKAFTER_IN_POLLREP); |
| goto err; |
| } |
| if (check_after < 0 || (uint64_t)check_after |
| > (sleep ? ULONG_MAX / 1000 : INT_MAX)) { |
| CMPerr(0, CMP_R_CHECKAFTER_OUT_OF_RANGE); |
| if (BIO_snprintf(str, OSSL_CMP_PKISI_BUFLEN, "value = %jd", |
| check_after) >= 0) |
| ERR_add_error_data(1, str); |
| goto err; |
| } |
| if (ctx->total_timeout > 0) { /* timeout is not infinite */ |
| const int exp = 5; /* expected max time per msg round trip */ |
| int64_t time_left = (int64_t)(ctx->end_time - exp - time(NULL)); |
| |
| if (time_left <= 0) { |
| CMPerr(0, CMP_R_TOTAL_TIMEOUT); |
| goto err; |
| } |
| if (time_left < check_after) |
| check_after = time_left; |
| /* poll one last time just when timeout was reached */ |
| } |
| |
| if (pollRep->reason == NULL |
| || (len = BIO_snprintf(str, OSSL_CMP_PKISI_BUFLEN, |
| " with reason = '")) < 0) { |
| *str = '\0'; |
| } else { |
| char *text = sk_ASN1_UTF8STRING2text(pollRep->reason, ", ", |
| sizeof(str) - len - 2); |
| |
| if (text == NULL |
| || BIO_snprintf(str + len, sizeof(str) - len, |
| "%s'", text) < 0) |
| *str = '\0'; |
| OPENSSL_free(text); |
| } |
| ossl_cmp_log2(INFO, ctx, |
| "received polling response%s; checkAfter = %ld seconds", |
| str, check_after); |
| |
| OSSL_CMP_MSG_free(preq); |
| preq = NULL; |
| OSSL_CMP_MSG_free(prep); |
| prep = NULL; |
| if (sleep) { |
| ossl_sleep((unsigned long)(1000 * check_after)); |
| } else { |
| if (checkAfter != NULL) |
| *checkAfter = (int)check_after; |
| return -1; /* exits the loop */ |
| } |
| } else { |
| ossl_cmp_info(ctx, "received ip/cp/kup after polling"); |
| /* any other body type has been rejected by send_receive_check() */ |
| break; |
| } |
| } |
| if (prep == NULL) |
| goto err; |
| |
| OSSL_CMP_MSG_free(preq); |
| *rep = prep; |
| |
| return 1; |
| err: |
| OSSL_CMP_MSG_free(preq); |
| OSSL_CMP_MSG_free(prep); |
| return 0; |
| } |
| |
| /* Send certConf for IR, CR or KUR sequences and check response */ |
| int ossl_cmp_exchange_certConf(OSSL_CMP_CTX *ctx, int fail_info, |
| const char *txt) |
| { |
| OSSL_CMP_MSG *certConf; |
| OSSL_CMP_MSG *PKIconf = NULL; |
| int res = 0; |
| |
| /* OSSL_CMP_certConf_new() also checks if all necessary options are set */ |
| if ((certConf = ossl_cmp_certConf_new(ctx, fail_info, txt)) == NULL) |
| goto err; |
| |
| res = send_receive_check(ctx, certConf, &PKIconf, OSSL_CMP_PKIBODY_PKICONF); |
| |
| err: |
| OSSL_CMP_MSG_free(certConf); |
| OSSL_CMP_MSG_free(PKIconf); |
| return res; |
| } |
| |
| /* Send given error and check response */ |
| int ossl_cmp_exchange_error(OSSL_CMP_CTX *ctx, int status, int fail_info, |
| const char *txt, int errorCode, const char *details) |
| { |
| OSSL_CMP_MSG *error = NULL; |
| OSSL_CMP_PKISI *si = NULL; |
| OSSL_CMP_MSG *PKIconf = NULL; |
| int res = 0; |
| |
| if ((si = OSSL_CMP_STATUSINFO_new(status, fail_info, txt)) == NULL) |
| goto err; |
| /* ossl_cmp_error_new() also checks if all necessary options are set */ |
| if ((error = ossl_cmp_error_new(ctx, si, errorCode, details, 0)) == NULL) |
| goto err; |
| |
| res = send_receive_check(ctx, error, &PKIconf, OSSL_CMP_PKIBODY_PKICONF); |
| |
| err: |
| OSSL_CMP_MSG_free(error); |
| OSSL_CMP_PKISI_free(si); |
| OSSL_CMP_MSG_free(PKIconf); |
| return res; |
| } |
| |
| /*- |
| * Retrieve a copy of the certificate, if any, from the given CertResponse. |
| * Take into account PKIStatusInfo of CertResponse in ctx, report it on error. |
| * Returns NULL if not found or on error. |
| */ |
| static X509 *get1_cert_status(OSSL_CMP_CTX *ctx, int bodytype, |
| OSSL_CMP_CERTRESPONSE *crep) |
| { |
| char buf[OSSL_CMP_PKISI_BUFLEN]; |
| X509 *crt = NULL; |
| EVP_PKEY *privkey; |
| |
| if (!ossl_assert(ctx != NULL && crep != NULL)) |
| return NULL; |
| |
| privkey = OSSL_CMP_CTX_get0_newPkey(ctx, 1); |
| switch (ossl_cmp_pkisi_get_status(crep->status)) { |
| case OSSL_CMP_PKISTATUS_waiting: |
| ossl_cmp_err(ctx, |
| "received \"waiting\" status for cert when actually aiming to extract cert"); |
| CMPerr(0, CMP_R_ENCOUNTERED_WAITING); |
| goto err; |
| case OSSL_CMP_PKISTATUS_grantedWithMods: |
| ossl_cmp_warn(ctx, "received \"grantedWithMods\" for certificate"); |
| break; |
| case OSSL_CMP_PKISTATUS_accepted: |
| break; |
| /* get all information in case of a rejection before going to error */ |
| case OSSL_CMP_PKISTATUS_rejection: |
| ossl_cmp_err(ctx, "received \"rejection\" status rather than cert"); |
| CMPerr(0, CMP_R_REQUEST_REJECTED_BY_SERVER); |
| goto err; |
| case OSSL_CMP_PKISTATUS_revocationWarning: |
| ossl_cmp_warn(ctx, |
| "received \"revocationWarning\" - a revocation of the cert is imminent"); |
| break; |
| case OSSL_CMP_PKISTATUS_revocationNotification: |
| ossl_cmp_warn(ctx, |
| "received \"revocationNotification\" - a revocation of the cert has occurred"); |
| break; |
| case OSSL_CMP_PKISTATUS_keyUpdateWarning: |
| if (bodytype != OSSL_CMP_PKIBODY_KUR) { |
| CMPerr(0, CMP_R_ENCOUNTERED_KEYUPDATEWARNING); |
| goto err; |
| } |
| break; |
| default: |
| ossl_cmp_log1(ERROR, ctx, |
| "received unsupported PKIStatus %d for certificate", |
| ctx->status); |
| CMPerr(0, CMP_R_UNKNOWN_PKISTATUS); |
| goto err; |
| } |
| crt = ossl_cmp_certresponse_get1_cert(crep, ctx, privkey); |
| if (crt == NULL) /* according to PKIStatus, we can expect a cert */ |
| CMPerr(0, CMP_R_CERTIFICATE_NOT_FOUND); |
| |
| return crt; |
| |
| err: |
| if (OSSL_CMP_CTX_snprint_PKIStatus(ctx, buf, sizeof(buf)) != NULL) |
| ERR_add_error_data(1, buf); |
| return NULL; |
| } |
| |
| /*- |
| * Callback fn validating that the new certificate can be verified, using |
| * ctx->certConf_cb_arg, which has been initialized using opt_out_trusted, and |
| * ctx->untrusted, which at this point already contains msg->extraCerts. |
| * Returns 0 on acceptance, else a bit field reflecting PKIFailureInfo. |
| * Quoting from RFC 4210 section 5.1. Overall PKI Message: |
| * The extraCerts field can contain certificates that may be useful to |
| * the recipient. For example, this can be used by a CA or RA to |
| * present an end entity with certificates that it needs to verify its |
| * own new certificate (if, for example, the CA that issued the end |
| * entity's certificate is not a root CA for the end entity). Note that |
| * this field does not necessarily contain a certification path; the |
| * recipient may have to sort, select from, or otherwise process the |
| * extra certificates in order to use them. |
| * Note: While often handy, there is no hard requirement by CMP that |
| * an EE must be able to validate the certificates it gets enrolled. |
| */ |
| int OSSL_CMP_certConf_cb(OSSL_CMP_CTX *ctx, X509 *cert, int fail_info, |
| const char **text) |
| { |
| X509_STORE *out_trusted = OSSL_CMP_CTX_get_certConf_cb_arg(ctx); |
| STACK_OF(X509) *chain = NULL; |
| (void)text; /* make (artificial) use of var to prevent compiler warning */ |
| |
| if (fail_info != 0) /* accept any error flagged by CMP core library */ |
| return fail_info; |
| |
| ossl_cmp_debug(ctx, "trying to build chain for newly enrolled cert"); |
| chain = ossl_cmp_build_cert_chain(ctx->libctx, ctx->propq, |
| out_trusted /* may be NULL */, |
| ctx->untrusted, cert); |
| if (sk_X509_num(chain) > 0) |
| X509_free(sk_X509_shift(chain)); /* remove leaf (EE) cert */ |
| if (out_trusted != NULL) { |
| if (chain == NULL) { |
| ossl_cmp_err(ctx, "failed building chain for newly enrolled cert"); |
| fail_info = 1 << OSSL_CMP_PKIFAILUREINFO_incorrectData; |
| } else { |
| ossl_cmp_debug(ctx, |
| "succeeded building proper chain for newly enrolled cert"); |
| } |
| } else if (chain == NULL) { |
| ossl_cmp_warn(ctx, "could not build approximate chain for newly enrolled cert, resorting to received extraCerts"); |
| chain = OSSL_CMP_CTX_get1_extraCertsIn(ctx); |
| } else { |
| ossl_cmp_debug(ctx, |
| "success building approximate chain for newly enrolled cert"); |
| } |
| (void)ossl_cmp_ctx_set1_newChain(ctx, chain); |
| sk_X509_pop_free(chain, X509_free); |
| |
| return fail_info; |
| } |
| |
| /*- |
| * Perform the generic handling of certificate responses for IR/CR/KUR/P10CR. |
| * Returns -1 on receiving pollRep if sleep == 0, setting the checkAfter value. |
| * Returns 1 on success and provides the received PKIMESSAGE in *resp. |
| * Returns 0 on error (which includes the case that timeout has been reached). |
| * Regardless of success, caller is responsible for freeing *resp (unless NULL). |
| */ |
| static int cert_response(OSSL_CMP_CTX *ctx, int sleep, int rid, |
| OSSL_CMP_MSG **resp, int *checkAfter, |
| int req_type, int expected_type) |
| { |
| EVP_PKEY *rkey = OSSL_CMP_CTX_get0_newPkey(ctx /* may be NULL */, 0); |
| int fail_info = 0; /* no failure */ |
| const char *txt = NULL; |
| OSSL_CMP_CERTREPMESSAGE *crepmsg; |
| OSSL_CMP_CERTRESPONSE *crep; |
| OSSL_CMP_certConf_cb_t cb; |
| X509 *cert; |
| char *subj = NULL; |
| int ret = 1; |
| |
| if (!ossl_assert(ctx != NULL)) |
| return 0; |
| |
| retry: |
| crepmsg = (*resp)->body->value.ip; /* same for cp and kup */ |
| if (sk_OSSL_CMP_CERTRESPONSE_num(crepmsg->response) > 1) { |
| CMPerr(0, CMP_R_MULTIPLE_RESPONSES_NOT_SUPPORTED); |
| return 0; |
| } |
| /* TODO: handle potentially multiple CertResponses in CertRepMsg */ |
| crep = ossl_cmp_certrepmessage_get0_certresponse(crepmsg, rid); |
| if (crep == NULL) |
| return 0; |
| if (!save_statusInfo(ctx, crep->status)) |
| return 0; |
| if (rid == -1) { |
| /* for OSSL_CMP_PKIBODY_P10CR learn CertReqId from response */ |
| rid = ossl_cmp_asn1_get_int(crep->certReqId); |
| if (rid == -1) { |
| CMPerr(0, CMP_R_BAD_REQUEST_ID); |
| return 0; |
| } |
| } |
| |
| if (ossl_cmp_pkisi_get_status(crep->status) == OSSL_CMP_PKISTATUS_waiting) { |
| OSSL_CMP_MSG_free(*resp); |
| *resp = NULL; |
| if ((ret = poll_for_response(ctx, sleep, rid, resp, checkAfter)) != 0) { |
| if (ret == -1) /* at this point implies sleep == 0 */ |
| return ret; /* waiting */ |
| goto retry; /* got ip/cp/kup, which may still indicate 'waiting' */ |
| } else { |
| CMPerr(0, CMP_R_POLLING_FAILED); |
| return 0; |
| } |
| } |
| |
| cert = get1_cert_status(ctx, (*resp)->body->type, crep); |
| if (cert == NULL) { |
| ERR_add_error_data(1, "; cannot extract certificate from response"); |
| return 0; |
| } |
| if (!ossl_cmp_ctx_set0_newCert(ctx, cert)) |
| return 0; |
| |
| /* |
| * if the CMP server returned certificates in the caPubs field, copy them |
| * to the context so that they can be retrieved if necessary |
| */ |
| if (crepmsg->caPubs != NULL |
| && !ossl_cmp_ctx_set1_caPubs(ctx, crepmsg->caPubs)) |
| return 0; |
| |
| subj = X509_NAME_oneline(X509_get_subject_name(cert), NULL, 0); |
| if (rkey != NULL |
| /* X509_check_private_key() also works if rkey is just public key */ |
| && !(X509_check_private_key(ctx->newCert, rkey))) { |
| fail_info = 1 << OSSL_CMP_PKIFAILUREINFO_incorrectData; |
| txt = "public key in new certificate does not match our enrollment key"; |
| /*- |
| * not calling (void)ossl_cmp_exchange_error(ctx, |
| * OSSL_CMP_PKISTATUS_rejection, fail_info, txt) |
| * not throwing CMP_R_CERTIFICATE_NOT_ACCEPTED with txt |
| * not returning 0 |
| * since we better leave this for the certConf_cb to decide |
| */ |
| } |
| |
| /* |
| * Execute the certification checking callback function, |
| * which can determine whether to accept a newly enrolled certificate. |
| * It may overrule the pre-decision reflected in 'fail_info' and '*txt'. |
| */ |
| cb = ctx->certConf_cb != NULL ? ctx->certConf_cb : OSSL_CMP_certConf_cb; |
| if ((fail_info = cb(ctx, ctx->newCert, fail_info, &txt)) != 0 |
| && txt == NULL) |
| txt = "CMP client did not accept it"; |
| if (fail_info != 0) /* immediately log error before any certConf exchange */ |
| ossl_cmp_log1(ERROR, ctx, |
| "rejecting newly enrolled cert with subject: %s", subj); |
| |
| /* |
| * TODO: better move certConf exchange to do_certreq_seq() such that |
| * also more low-level errors with CertReqMessages get reported to server |
| */ |
| if (!ctx->disableConfirm |
| && !ossl_cmp_hdr_has_implicitConfirm((*resp)->header)) { |
| if (!ossl_cmp_exchange_certConf(ctx, fail_info, txt)) |
| ret = 0; |
| } |
| |
| /* not throwing failure earlier as transfer_cb may call ERR_clear_error() */ |
| if (fail_info != 0) { |
| CMPerr(0, CMP_R_CERTIFICATE_NOT_ACCEPTED); |
| ERR_add_error_data(2, "rejecting newly enrolled cert with subject: ", |
| subj); |
| if (txt != NULL) |
| ERR_add_error_txt("; ", txt); |
| ret = 0; |
| } |
| OPENSSL_free(subj); |
| return ret; |
| } |
| |
| int OSSL_CMP_try_certreq(OSSL_CMP_CTX *ctx, int req_type, |
| const OSSL_CRMF_MSG *crm, int *checkAfter) |
| { |
| OSSL_CMP_MSG *req = NULL; |
| OSSL_CMP_MSG *rep = NULL; |
| int is_p10 = req_type == OSSL_CMP_PKIBODY_P10CR; |
| int rid = is_p10 ? -1 : OSSL_CMP_CERTREQID; |
| int rep_type = is_p10 ? OSSL_CMP_PKIBODY_CP : req_type + 1; |
| int res = 0; |
| |
| if (ctx == NULL) { |
| CMPerr(0, CMP_R_NULL_ARGUMENT); |
| return 0; |
| } |
| |
| if (ctx->status != OSSL_CMP_PKISTATUS_waiting) { /* not polling already */ |
| ctx->status = -1; |
| if (!ossl_cmp_ctx_set0_newCert(ctx, NULL)) |
| return 0; |
| |
| if (ctx->total_timeout > 0) /* else ctx->end_time is not used */ |
| ctx->end_time = time(NULL) + ctx->total_timeout; |
| |
| req = ossl_cmp_certreq_new(ctx, req_type, crm); |
| if (req == NULL) /* also checks if all necessary options are set */ |
| return 0; |
| |
| if (!send_receive_check(ctx, req, &rep, rep_type)) |
| goto err; |
| } else { |
| if (req_type < 0) |
| return ossl_cmp_exchange_error(ctx, OSSL_CMP_PKISTATUS_rejection, |
| 0 /* TODO better fail_info value? */, |
| "polling aborted", 0 /* errorCode */, |
| "by application"); |
| res = poll_for_response(ctx, 0 /* no sleep */, rid, &rep, checkAfter); |
| if (res <= 0) /* waiting or error */ |
| return res; |
| } |
| res = cert_response(ctx, 0 /* no sleep */, rid, &rep, checkAfter, |
| req_type, rep_type); |
| |
| err: |
| OSSL_CMP_MSG_free(req); |
| OSSL_CMP_MSG_free(rep); |
| return res; |
| } |
| |
| /*- |
| * Do the full sequence CR/IR/KUR/P10CR, CP/IP/KUP/CP, |
| * certConf, PKIconf, and polling if required. |
| * Will sleep as long as indicated by the server (according to checkAfter). |
| * All enrollment options need to be present in the context. |
| * TODO: another function to request two certificates at once should be created. |
| * Returns pointer to received certificate, or NULL if none was received. |
| */ |
| X509 *OSSL_CMP_exec_certreq(OSSL_CMP_CTX *ctx, int req_type, |
| const OSSL_CRMF_MSG *crm) |
| { |
| |
| OSSL_CMP_MSG *req = NULL; |
| OSSL_CMP_MSG *rep = NULL; |
| int is_p10 = req_type == OSSL_CMP_PKIBODY_P10CR; |
| int rid = is_p10 ? -1 : OSSL_CMP_CERTREQID; |
| int rep_type = is_p10 ? OSSL_CMP_PKIBODY_CP : req_type + 1; |
| X509 *result = NULL; |
| |
| if (ctx == NULL) { |
| CMPerr(0, CMP_R_NULL_ARGUMENT); |
| return NULL; |
| } |
| if (is_p10 && crm != NULL) { |
| CMPerr(0, CMP_R_INVALID_ARGS); |
| return NULL; |
| } |
| |
| ctx->status = -1; |
| if (!ossl_cmp_ctx_set0_newCert(ctx, NULL)) |
| return NULL; |
| |
| if (ctx->total_timeout > 0) /* else ctx->end_time is not used */ |
| ctx->end_time = time(NULL) + ctx->total_timeout; |
| |
| /* OSSL_CMP_certreq_new() also checks if all necessary options are set */ |
| if ((req = ossl_cmp_certreq_new(ctx, req_type, crm)) == NULL) |
| goto err; |
| |
| if (!send_receive_check(ctx, req, &rep, rep_type)) |
| goto err; |
| |
| if (cert_response(ctx, 1 /* sleep */, rid, &rep, NULL, req_type, rep_type) |
| <= 0) |
| goto err; |
| |
| result = ctx->newCert; |
| err: |
| OSSL_CMP_MSG_free(req); |
| OSSL_CMP_MSG_free(rep); |
| return result; |
| } |
| |
| X509 *OSSL_CMP_exec_RR_ses(OSSL_CMP_CTX *ctx) |
| { |
| OSSL_CMP_MSG *rr = NULL; |
| OSSL_CMP_MSG *rp = NULL; |
| const int num_RevDetails = 1; |
| const int rsid = OSSL_CMP_REVREQSID; |
| OSSL_CMP_REVREPCONTENT *rrep = NULL; |
| OSSL_CMP_PKISI *si = NULL; |
| char buf[OSSL_CMP_PKISI_BUFLEN]; |
| X509 *result = NULL; |
| |
| if (ctx == NULL) { |
| CMPerr(0, CMP_R_INVALID_ARGS); |
| return 0; |
| } |
| if (ctx->oldCert == NULL) { |
| CMPerr(0, CMP_R_MISSING_REFERENCE_CERT); |
| return 0; |
| } |
| ctx->status = -1; |
| |
| /* OSSL_CMP_rr_new() also checks if all necessary options are set */ |
| if ((rr = ossl_cmp_rr_new(ctx)) == NULL) |
| goto end; |
| |
| if (!send_receive_check(ctx, rr, &rp, OSSL_CMP_PKIBODY_RP)) |
| goto end; |
| |
| rrep = rp->body->value.rp; |
| #ifndef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION |
| if (sk_OSSL_CMP_PKISI_num(rrep->status) != num_RevDetails) { |
| CMPerr(0, CMP_R_WRONG_RP_COMPONENT_COUNT); |
| goto end; |
| } |
| #else |
| if (sk_OSSL_CMP_PKISI_num(rrep->status) < 1) { |
| CMPerr(0, CMP_R_WRONG_RP_COMPONENT_COUNT); |
| goto end; |
| } |
| #endif |
| |
| /* evaluate PKIStatus field */ |
| si = ossl_cmp_revrepcontent_get_pkisi(rrep, rsid); |
| if (!save_statusInfo(ctx, si)) |
| goto err; |
| switch (ossl_cmp_pkisi_get_status(si)) { |
| case OSSL_CMP_PKISTATUS_accepted: |
| ossl_cmp_info(ctx, "revocation accepted (PKIStatus=accepted)"); |
| result = ctx->oldCert; |
| break; |
| case OSSL_CMP_PKISTATUS_grantedWithMods: |
| ossl_cmp_info(ctx, "revocation accepted (PKIStatus=grantedWithMods)"); |
| result = ctx->oldCert; |
| break; |
| case OSSL_CMP_PKISTATUS_rejection: |
| CMPerr(0, CMP_R_REQUEST_REJECTED_BY_SERVER); |
| goto err; |
| case OSSL_CMP_PKISTATUS_revocationWarning: |
| ossl_cmp_info(ctx, "revocation accepted (PKIStatus=revocationWarning)"); |
| result = ctx->oldCert; |
| break; |
| case OSSL_CMP_PKISTATUS_revocationNotification: |
| /* interpretation as warning or error depends on CA */ |
| ossl_cmp_warn(ctx, |
| "revocation accepted (PKIStatus=revocationNotification)"); |
| result = ctx->oldCert; |
| break; |
| case OSSL_CMP_PKISTATUS_waiting: |
| case OSSL_CMP_PKISTATUS_keyUpdateWarning: |
| CMPerr(0, CMP_R_UNEXPECTED_PKISTATUS); |
| goto err; |
| default: |
| CMPerr(0, CMP_R_UNKNOWN_PKISTATUS); |
| goto err; |
| } |
| |
| /* check any present CertId in optional revCerts field */ |
| if (rrep->revCerts != NULL) { |
| OSSL_CRMF_CERTID *cid; |
| OSSL_CRMF_CERTTEMPLATE *tmpl = |
| sk_OSSL_CMP_REVDETAILS_value(rr->body->value.rr, rsid)->certDetails; |
| const X509_NAME *issuer = OSSL_CRMF_CERTTEMPLATE_get0_issuer(tmpl); |
| ASN1_INTEGER *serial = OSSL_CRMF_CERTTEMPLATE_get0_serialNumber(tmpl); |
| |
| if (sk_OSSL_CRMF_CERTID_num(rrep->revCerts) != num_RevDetails) { |
| CMPerr(0, CMP_R_WRONG_RP_COMPONENT_COUNT); |
| result = NULL; |
| goto err; |
| } |
| if ((cid = ossl_cmp_revrepcontent_get_CertId(rrep, rsid)) == NULL) { |
| result = NULL; |
| goto err; |
| } |
| if (X509_NAME_cmp(issuer, OSSL_CRMF_CERTID_get0_issuer(cid)) != 0) { |
| #ifndef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION |
| CMPerr(0, CMP_R_WRONG_CERTID_IN_RP); |
| result = NULL; |
| goto err; |
| #endif |
| } |
| if (ASN1_INTEGER_cmp(serial, |
| OSSL_CRMF_CERTID_get0_serialNumber(cid)) != 0) { |
| #ifndef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION |
| CMPerr(0, CMP_R_WRONG_SERIAL_IN_RP); |
| result = NULL; |
| goto err; |
| #endif |
| } |
| } |
| |
| /* check number of any optionally present crls */ |
| if (rrep->crls != NULL && sk_X509_CRL_num(rrep->crls) != num_RevDetails) { |
| CMPerr(0, CMP_R_WRONG_RP_COMPONENT_COUNT); |
| result = NULL; |
| goto err; |
| } |
| |
| err: |
| if (result == NULL |
| && OSSL_CMP_CTX_snprint_PKIStatus(ctx, buf, sizeof(buf)) != NULL) |
| ERR_add_error_data(1, buf); |
| |
| end: |
| OSSL_CMP_MSG_free(rr); |
| OSSL_CMP_MSG_free(rp); |
| return result; |
| } |
| |
| STACK_OF(OSSL_CMP_ITAV) *OSSL_CMP_exec_GENM_ses(OSSL_CMP_CTX *ctx) |
| { |
| OSSL_CMP_MSG *genm; |
| OSSL_CMP_MSG *genp = NULL; |
| STACK_OF(OSSL_CMP_ITAV) *rcvd_itavs = NULL; |
| |
| if (ctx == NULL) { |
| CMPerr(0, CMP_R_INVALID_ARGS); |
| return 0; |
| } |
| |
| if ((genm = ossl_cmp_genm_new(ctx)) == NULL) |
| goto err; |
| |
| if (!send_receive_check(ctx, genm, &genp, OSSL_CMP_PKIBODY_GENP)) |
| goto err; |
| |
| /* received stack of itavs not to be freed with the genp */ |
| rcvd_itavs = genp->body->value.genp; |
| genp->body->value.genp = NULL; |
| |
| err: |
| OSSL_CMP_MSG_free(genm); |
| OSSL_CMP_MSG_free(genp); |
| |
| return rcvd_itavs; /* recv_itavs == NULL indicates an error */ |
| } |
