diff options
Diffstat (limited to 'source4/heimdal/lib/hx509/revoke.c')
| -rw-r--r-- | source4/heimdal/lib/hx509/revoke.c | 1020 |
1 files changed, 1020 insertions, 0 deletions
diff --git a/source4/heimdal/lib/hx509/revoke.c b/source4/heimdal/lib/hx509/revoke.c new file mode 100644 index 0000000000..8067b29c10 --- /dev/null +++ b/source4/heimdal/lib/hx509/revoke.c @@ -0,0 +1,1020 @@ +/* + * Copyright (c) 2006 Kungliga Tekniska Högskolan + * (Royal Institute of Technology, Stockholm, Sweden). + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * 3. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include "hx_locl.h" +RCSID("$Id: revoke.c,v 1.32 2006/12/30 17:09:06 lha Exp $"); + +struct revoke_crl { + char *path; + time_t last_modfied; + CRLCertificateList crl; + int verified; +}; + +struct revoke_ocsp { + char *path; + time_t last_modfied; + OCSPBasicOCSPResponse ocsp; + hx509_certs certs; + hx509_cert signer; +}; + + +struct hx509_revoke_ctx_data { + struct { + struct revoke_crl *val; + size_t len; + } crls; + struct { + struct revoke_ocsp *val; + size_t len; + } ocsps; +}; + +int +hx509_revoke_init(hx509_context context, hx509_revoke_ctx *ctx) +{ + *ctx = calloc(1, sizeof(**ctx)); + if (*ctx == NULL) + return ENOMEM; + + (*ctx)->crls.len = 0; + (*ctx)->crls.val = NULL; + (*ctx)->ocsps.len = 0; + (*ctx)->ocsps.val = NULL; + + return 0; +} + +static void +free_ocsp(struct revoke_ocsp *ocsp) +{ + free(ocsp->path); + free_OCSPBasicOCSPResponse(&ocsp->ocsp); + hx509_certs_free(&ocsp->certs); + hx509_cert_free(ocsp->signer); +} + +void +hx509_revoke_free(hx509_revoke_ctx *ctx) +{ + size_t i ; + + if (ctx == NULL || *ctx == NULL) + return; + + for (i = 0; i < (*ctx)->crls.len; i++) { + free((*ctx)->crls.val[i].path); + free_CRLCertificateList(&(*ctx)->crls.val[i].crl); + } + + for (i = 0; i < (*ctx)->ocsps.len; i++) + free_ocsp(&(*ctx)->ocsps.val[i]); + free((*ctx)->ocsps.val); + + free((*ctx)->crls.val); + + memset(*ctx, 0, sizeof(**ctx)); + free(*ctx); + *ctx = NULL; +} + +static int +verify_ocsp(hx509_context context, + struct revoke_ocsp *ocsp, + time_t time_now, + hx509_certs certs, + hx509_cert parent) +{ + hx509_cert signer = NULL; + hx509_query q; + int ret; + + _hx509_query_clear(&q); + + /* + * Need to match on issuer too in case there are two CA that have + * issued the same name to a certificate. One example of this is + * the www.openvalidation.org test's ocsp validator. + */ + + q.match = HX509_QUERY_MATCH_ISSUER_NAME; + q.issuer_name = &_hx509_get_cert(parent)->tbsCertificate.issuer; + + switch(ocsp->ocsp.tbsResponseData.responderID.element) { + case choice_OCSPResponderID_byName: + q.match |= HX509_QUERY_MATCH_SUBJECT_NAME; + q.subject_name = &ocsp->ocsp.tbsResponseData.responderID.u.byName; + break; + case choice_OCSPResponderID_byKey: + q.match |= HX509_QUERY_MATCH_KEY_HASH_SHA1; + q.keyhash_sha1 = &ocsp->ocsp.tbsResponseData.responderID.u.byKey; + break; + } + + ret = hx509_certs_find(context, certs, &q, &signer); + if (ret && ocsp->certs) + ret = hx509_certs_find(context, ocsp->certs, &q, &signer); + if (ret) + goto out; + + /* + * If signer certificate isn't the CA certificate, lets check the + * its the CA that signed the signer certificate and the OCSP EKU + * is set. + */ + if (hx509_cert_cmp(signer, parent) != 0) { + Certificate *p = _hx509_get_cert(parent); + Certificate *s = _hx509_get_cert(signer); + + ret = _hx509_cert_is_parent_cmp(s, p, 0); + if (ret != 0) { + ret = HX509_PARENT_NOT_CA; + hx509_set_error_string(context, 0, ret, "Revoke OSCP signer is " + "doesn't have CA as signer certificate"); + goto out; + } + + ret = _hx509_verify_signature_bitstring(context, + p, + &s->signatureAlgorithm, + &s->tbsCertificate._save, + &s->signatureValue); + if (ret) { + hx509_set_error_string(context, HX509_ERROR_APPEND, ret, + "OSCP signer signature invalid"); + goto out; + } + + ret = hx509_cert_check_eku(context, signer, + oid_id_pkix_kp_OCSPSigning(), 0); + if (ret) + goto out; + } + + ret = _hx509_verify_signature_bitstring(context, + _hx509_get_cert(signer), + &ocsp->ocsp.signatureAlgorithm, + &ocsp->ocsp.tbsResponseData._save, + &ocsp->ocsp.signature); + if (ret) { + hx509_set_error_string(context, HX509_ERROR_APPEND, ret, + "OSCP signature invalid"); + goto out; + } + + ocsp->signer = signer; + signer = NULL; +out: + if (signer) + hx509_cert_free(signer); + + return ret; +} + +/* + * + */ + +static int +parse_ocsp_basic(const void *data, size_t length, OCSPBasicOCSPResponse *basic) +{ + OCSPResponse resp; + size_t size; + int ret; + + memset(basic, 0, sizeof(*basic)); + + ret = decode_OCSPResponse(data, length, &resp, &size); + if (ret) + return ret; + if (length != size) { + free_OCSPResponse(&resp); + return ASN1_EXTRA_DATA; + } + + switch (resp.responseStatus) { + case successful: + break; + default: + free_OCSPResponse(&resp); + return HX509_REVOKE_WRONG_DATA; + } + + if (resp.responseBytes == NULL) { + free_OCSPResponse(&resp); + return EINVAL; + } + + ret = der_heim_oid_cmp(&resp.responseBytes->responseType, + oid_id_pkix_ocsp_basic()); + if (ret != 0) { + free_OCSPResponse(&resp); + return HX509_REVOKE_WRONG_DATA; + } + + ret = decode_OCSPBasicOCSPResponse(resp.responseBytes->response.data, + resp.responseBytes->response.length, + basic, + &size); + if (ret) { + free_OCSPResponse(&resp); + return ret; + } + if (size != resp.responseBytes->response.length) { + free_OCSPResponse(&resp); + free_OCSPBasicOCSPResponse(basic); + return ASN1_EXTRA_DATA; + } + free_OCSPResponse(&resp); + + return 0; +} + +/* + * + */ + +static int +load_ocsp(hx509_context context, struct revoke_ocsp *ocsp) +{ + OCSPBasicOCSPResponse basic; + hx509_certs certs = NULL; + size_t length; + struct stat sb; + void *data; + int ret; + + ret = _hx509_map_file(ocsp->path, &data, &length, &sb); + if (ret) + return ret; + + ret = parse_ocsp_basic(data, length, &basic); + _hx509_unmap_file(data, length); + if (ret) + return ret; + + if (basic.certs) { + int i; + + ret = hx509_certs_init(context, "MEMORY:ocsp-certs", 0, + NULL, &certs); + if (ret) { + free_OCSPBasicOCSPResponse(&basic); + return ret; + } + + for (i = 0; i < basic.certs->len; i++) { + hx509_cert c; + + ret = hx509_cert_init(context, &basic.certs->val[i], &c); + if (ret) + continue; + + ret = hx509_certs_add(context, certs, c); + hx509_cert_free(c); + if (ret) + continue; + } + } + + ocsp->last_modfied = sb.st_mtime; + + free_OCSPBasicOCSPResponse(&ocsp->ocsp); + hx509_certs_free(&ocsp->certs); + hx509_cert_free(ocsp->signer); + + ocsp->ocsp = basic; + ocsp->certs = certs; + ocsp->signer = NULL; + + return 0; +} + +int +hx509_revoke_add_ocsp(hx509_context context, + hx509_revoke_ctx ctx, + const char *path) +{ + void *data; + int ret; + size_t i; + + if (strncmp(path, "FILE:", 5) != 0) { + hx509_set_error_string(context, 0, HX509_UNSUPPORTED_OPERATION, + "unsupport type in %s", path); + return HX509_UNSUPPORTED_OPERATION; + } + + path += 5; + + for (i = 0; i < ctx->ocsps.len; i++) { + if (strcmp(ctx->ocsps.val[0].path, path) == 0) + return 0; + } + + data = realloc(ctx->ocsps.val, + (ctx->ocsps.len + 1) * sizeof(ctx->ocsps.val[0])); + if (data == NULL) { + hx509_clear_error_string(context); + return ENOMEM; + } + + ctx->ocsps.val = data; + + memset(&ctx->ocsps.val[ctx->ocsps.len], 0, + sizeof(ctx->ocsps.val[0])); + + ctx->ocsps.val[ctx->ocsps.len].path = strdup(path); + if (ctx->ocsps.val[ctx->ocsps.len].path == NULL) { + hx509_clear_error_string(context); + return ENOMEM; + } + + ret = load_ocsp(context, &ctx->ocsps.val[ctx->ocsps.len]); + if (ret) { + free(ctx->ocsps.val[ctx->ocsps.len].path); + return ret; + } + ctx->ocsps.len++; + + return ret; +} + +/* + * + */ + +static int +verify_crl(hx509_context context, + CRLCertificateList *crl, + time_t time_now, + hx509_certs certs, + hx509_cert parent) +{ + hx509_cert signer; + hx509_query q; + time_t t; + int ret; + + t = _hx509_Time2time_t(&crl->tbsCertList.thisUpdate); + if (t > time_now) + return HX509_CRL_USED_BEFORE_TIME; + + if (crl->tbsCertList.nextUpdate == NULL) + return HX509_CRL_INVALID_FORMAT; + + t = _hx509_Time2time_t(crl->tbsCertList.nextUpdate); + if (t < time_now) + return HX509_CRL_USED_AFTER_TIME; + + _hx509_query_clear(&q); + + q.match = HX509_QUERY_MATCH_SUBJECT_NAME; + q.subject_name = &crl->tbsCertList.issuer; + + ret = hx509_certs_find(context, certs, &q, &signer); + if (ret) + return ret; + + /* verify is parent or CRLsigner */ + if (hx509_cert_cmp(signer, parent) != 0) { + Certificate *p = _hx509_get_cert(parent); + Certificate *s = _hx509_get_cert(signer); + + ret = _hx509_cert_is_parent_cmp(s, p, 0); + if (ret != 0) { + ret = HX509_PARENT_NOT_CA; + hx509_set_error_string(context, 0, ret, "Revoke CRL signer is " + "doesn't have CA as signer certificate"); + goto out; + } + + ret = _hx509_verify_signature_bitstring(context, + p, + &s->signatureAlgorithm, + &s->tbsCertificate._save, + &s->signatureValue); + if (ret) { + hx509_set_error_string(context, HX509_ERROR_APPEND, ret, + "CRL signer signature invalid"); + goto out; + } + + ret = _hx509_check_key_usage(context, signer, 1 << 6, TRUE); /* crl */ + if (ret != 0) + goto out; + } + + ret = _hx509_verify_signature_bitstring(context, + _hx509_get_cert(signer), + &crl->signatureAlgorithm, + &crl->tbsCertList._save, + &crl->signatureValue); + if (ret) { + hx509_set_error_string(context, HX509_ERROR_APPEND, ret, "CRL signature invalid"); + goto out; + } + +out: + hx509_cert_free(signer); + + return ret; +} + +static int +load_crl(const char *path, time_t *t, CRLCertificateList *crl) +{ + size_t length, size; + struct stat sb; + void *data; + int ret; + + memset(crl, 0, sizeof(*crl)); + + ret = _hx509_map_file(path, &data, &length, &sb); + if (ret) + return ret; + + *t = sb.st_mtime; + + ret = decode_CRLCertificateList(data, length, crl, &size); + _hx509_unmap_file(data, length); + if (ret) + return ret; + + /* check signature is aligned */ + if (crl->signatureValue.length & 7) { + free_CRLCertificateList(crl); + return HX509_CRYPTO_SIG_INVALID_FORMAT; + } + return 0; +} + +int +hx509_revoke_add_crl(hx509_context context, + hx509_revoke_ctx ctx, + const char *path) +{ + void *data; + size_t i; + int ret; + + if (strncmp(path, "FILE:", 5) != 0) { + hx509_set_error_string(context, 0, HX509_UNSUPPORTED_OPERATION, + "unsupport type in %s", path); + return HX509_UNSUPPORTED_OPERATION; + } + + + path += 5; + + for (i = 0; i < ctx->crls.len; i++) { + if (strcmp(ctx->crls.val[0].path, path) == 0) + return 0; + } + + data = realloc(ctx->crls.val, + (ctx->crls.len + 1) * sizeof(ctx->crls.val[0])); + if (data == NULL) { + hx509_clear_error_string(context); + return ENOMEM; + } + ctx->crls.val = data; + + memset(&ctx->crls.val[ctx->crls.len], 0, sizeof(ctx->crls.val[0])); + + ctx->crls.val[ctx->crls.len].path = strdup(path); + if (ctx->crls.val[ctx->crls.len].path == NULL) { + hx509_clear_error_string(context); + return ENOMEM; + } + + ret = load_crl(path, + &ctx->crls.val[ctx->crls.len].last_modfied, + &ctx->crls.val[ctx->crls.len].crl); + if (ret) { + free(ctx->crls.val[ctx->crls.len].path); + return ret; + } + + ctx->crls.len++; + + return ret; +} + + +int +hx509_revoke_verify(hx509_context context, + hx509_revoke_ctx ctx, + hx509_certs certs, + time_t now, + hx509_cert cert, + hx509_cert parent_cert) +{ + const Certificate *c = _hx509_get_cert(cert); + const Certificate *p = _hx509_get_cert(parent_cert); + unsigned long i, j, k; + int ret; + + for (i = 0; i < ctx->ocsps.len; i++) { + struct revoke_ocsp *ocsp = &ctx->ocsps.val[i]; + struct stat sb; + + /* check this ocsp apply to this cert */ + + /* check if there is a newer version of the file */ + ret = stat(ocsp->path, &sb); + if (ret == 0 && ocsp->last_modfied != sb.st_mtime) { + ret = load_ocsp(context, ocsp); + if (ret) + continue; + } + + /* verify signature in ocsp if not already done */ + if (ocsp->signer == NULL) { + ret = verify_ocsp(context, ocsp, now, certs, parent_cert); + if (ret) + continue; + } + + for (i = 0; i < ocsp->ocsp.tbsResponseData.responses.len; i++) { + heim_octet_string os; + + ret = der_heim_integer_cmp(&ocsp->ocsp.tbsResponseData.responses.val[i].certID.serialNumber, + &c->tbsCertificate.serialNumber); + if (ret != 0) + continue; + + /* verify issuer hashes hash */ + ret = _hx509_verify_signature(context, + NULL, + &ocsp->ocsp.tbsResponseData.responses.val[i].certID.hashAlgorithm, + &c->tbsCertificate.issuer._save, + &ocsp->ocsp.tbsResponseData.responses.val[i].certID.issuerNameHash); + if (ret != 0) + continue; + + os.data = p->tbsCertificate.subjectPublicKeyInfo.subjectPublicKey.data; + os.length = p->tbsCertificate.subjectPublicKeyInfo.subjectPublicKey.length / 8; + + ret = _hx509_verify_signature(context, + NULL, + &ocsp->ocsp.tbsResponseData.responses.val[i].certID.hashAlgorithm, + &os, + &ocsp->ocsp.tbsResponseData.responses.val[i].certID.issuerKeyHash); + if (ret != 0) + continue; + + switch (ocsp->ocsp.tbsResponseData.responses.val[i].certStatus.element) { + case choice_OCSPCertStatus_good: + break; + case choice_OCSPCertStatus_revoked: + case choice_OCSPCertStatus_unknown: + continue; + } + + /* don't allow the update to be in the future */ + if (ocsp->ocsp.tbsResponseData.responses.val[i].thisUpdate > + now + context->ocsp_time_diff) + continue; + + /* don't allow the next updte to be in the past */ + if (ocsp->ocsp.tbsResponseData.responses.val[i].nextUpdate) { + if (*ocsp->ocsp.tbsResponseData.responses.val[i].nextUpdate < now) + continue; + } else + /* Should force a refetch, but can we ? */; + + return 0; + } + } + + for (i = 0; i < ctx->crls.len; i++) { + struct revoke_crl *crl = &ctx->crls.val[i]; + struct stat sb; + + /* check if cert.issuer == crls.val[i].crl.issuer */ + ret = _hx509_name_cmp(&c->tbsCertificate.issuer, + &crl->crl.tbsCertList.issuer); + if (ret) + continue; + + ret = stat(crl->path, &sb); + if (ret == 0 && crl->last_modfied != sb.st_mtime) { + CRLCertificateList cl; + + ret = load_crl(crl->path, &crl->last_modfied, &cl); + if (ret == 0) { + free_CRLCertificateList(&crl->crl); + crl->crl = cl; + crl->verified = 0; + } + } + + /* verify signature in crl if not already done */ + if (crl->verified == 0) { + ret = verify_crl(context, &crl->crl, now, certs, parent_cert); + if (ret) + return ret; + crl->verified = 1; + } + + if (crl->crl.tbsCertList.crlExtensions) + for (j = 0; j < crl->crl.tbsCertList.crlExtensions->len; j++) + if (crl->crl.tbsCertList.crlExtensions->val[j].critical) + return HX509_CRL_UNKNOWN_EXTENSION; + + if (crl->crl.tbsCertList.revokedCertificates == NULL) + return 0; + + /* check if cert is in crl */ + for (j = 0; j < crl->crl.tbsCertList.revokedCertificates->len; j++) { + time_t t; + + ret = der_heim_integer_cmp(&crl->crl.tbsCertList.revokedCertificates->val[j].userCertificate, + &c->tbsCertificate.serialNumber); + if (ret != 0) + continue; + + t = _hx509_Time2time_t(&crl->crl.tbsCertList.revokedCertificates->val[j].revocationDate); + if (t > now) + continue; + + if (crl->crl.tbsCertList.revokedCertificates->val[j].crlEntryExtensions) + for (k = 0; k < crl->crl.tbsCertList.revokedCertificates->val[j].crlEntryExtensions->len; k++) + if (crl->crl.tbsCertList.revokedCertificates->val[j].crlEntryExtensions->val[k].critical) + return HX509_CRL_UNKNOWN_EXTENSION; + + return HX509_CRL_CERT_REVOKED; + } + + return 0; + } + + + if (context->flags & HX509_CTX_VERIFY_MISSING_OK) + return 0; + return HX509_REVOKE_STATUS_MISSING; +} + +struct ocsp_add_ctx { + OCSPTBSRequest *req; + hx509_certs certs; + const AlgorithmIdentifier *digest; + hx509_cert parent; +}; + +static int +add_to_req(hx509_context context, void *ptr, hx509_cert cert) +{ + struct ocsp_add_ctx *ctx = ptr; + OCSPInnerRequest *one; + hx509_cert parent = NULL; + Certificate *p, *c = _hx509_get_cert(cert); + heim_octet_string os; + int ret; + hx509_query q; + void *d; + + d = realloc(ctx->req->requestList.val, + sizeof(ctx->req->requestList.val[0]) * + (ctx->req->requestList.len + 1)); + if (d == NULL) + return ENOMEM; + ctx->req->requestList.val = d; + + one = &ctx->req->requestList.val[ctx->req->requestList.len]; + memset(one, 0, sizeof(*one)); + + _hx509_query_clear(&q); + + q.match |= HX509_QUERY_FIND_ISSUER_CERT; + q.subject = c; + + ret = hx509_certs_find(context, ctx->certs, &q, &parent); + if (ret) + goto out; + + if (ctx->parent) { + if (hx509_cert_cmp(ctx->parent, parent) != 0) { + ret = HX509_REVOKE_NOT_SAME_PARENT; + hx509_set_error_string(context, 0, ret, + "Not same parent certifate as " + "last certificate in request"); + goto out; + } + } else + ctx->parent = hx509_cert_ref(parent); + + p = _hx509_get_cert(parent); + + ret = copy_AlgorithmIdentifier(ctx->digest, &one->reqCert.hashAlgorithm); + if (ret) + goto out; + + ret = _hx509_create_signature(context, + NULL, + &one->reqCert.hashAlgorithm, + &c->tbsCertificate.issuer._save, + NULL, + &one->reqCert.issuerNameHash); + if (ret) + goto out; + + os.data = p->tbsCertificate.subjectPublicKeyInfo.subjectPublicKey.data; + os.length = + p->tbsCertificate.subjectPublicKeyInfo.subjectPublicKey.length / 8; + + ret = _hx509_create_signature(context, + NULL, + &one->reqCert.hashAlgorithm, + &os, + NULL, + &one->reqCert.issuerKeyHash); + if (ret) + goto out; + + ret = copy_CertificateSerialNumber(&c->tbsCertificate.serialNumber, + &one->reqCert.serialNumber); + if (ret) + goto out; + + ctx->req->requestList.len++; +out: + hx509_cert_free(parent); + if (ret) { + free_OCSPInnerRequest(one); + memset(one, 0, sizeof(*one)); + } + + return ret; +} + + +int +hx509_ocsp_request(hx509_context context, + hx509_certs reqcerts, + hx509_certs pool, + hx509_cert signer, + const AlgorithmIdentifier *digest, + heim_octet_string *request, + heim_octet_string *nonce) +{ + OCSPRequest req; + size_t size; + int ret; + struct ocsp_add_ctx ctx; + Extensions *es; + + memset(&req, 0, sizeof(req)); + + if (digest == NULL) + digest = hx509_signature_sha1(); + + ctx.req = &req.tbsRequest; + ctx.certs = pool; + ctx.digest = digest; + ctx.parent = NULL; + + ret = hx509_certs_iter(context, reqcerts, add_to_req, &ctx); + hx509_cert_free(ctx.parent); + if (ret) { + free_OCSPRequest(&req); + return ret; + } + + if (nonce) { + + req.tbsRequest.requestExtensions = + calloc(1, sizeof(*req.tbsRequest.requestExtensions)); + if (req.tbsRequest.requestExtensions == NULL) { + free_OCSPRequest(&req); + return ENOMEM; + } + + es = req.tbsRequest.requestExtensions; + + es->len = 1; + es->val = calloc(es->len, sizeof(es->val[0])); + + ret = der_copy_oid(oid_id_pkix_ocsp_nonce(), &es->val[0].extnID); + if (ret) + abort(); + + es->val[0].extnValue.data = malloc(10); + if (es->val[0].extnValue.data == NULL) { + free_OCSPRequest(&req); + return ENOMEM; + } + es->val[0].extnValue.length = 10; + + ret = RAND_bytes(es->val[0].extnValue.data, + es->val[0].extnValue.length); + if (ret != 1) { + free_OCSPRequest(&req); + return HX509_CRYPTO_INTERNAL_ERROR; + } + } + + ASN1_MALLOC_ENCODE(OCSPRequest, request->data, request->length, + &req, &size, ret); + free_OCSPRequest(&req); + if (ret) + return ret; + if (size != request->length) + _hx509_abort("internal ASN.1 encoder error"); + + + return 0; +} + +static char * +printable_time(time_t t) +{ + static char s[128]; + strlcpy(s, ctime(&t)+ 4, sizeof(s)); + s[20] = 0; + return s; +} + +int +hx509_revoke_ocsp_print(hx509_context context, const char *path, FILE *out) +{ + struct revoke_ocsp ocsp; + int ret, i; + + if (out == NULL) + out = stdout; + + memset(&ocsp, 0, sizeof(ocsp)); + + ocsp.path = strdup(path); + if (ocsp.path == NULL) + return ENOMEM; + + ret = load_ocsp(context, &ocsp); + if (ret) { + free_ocsp(&ocsp); + return ret; + } + + fprintf(out, "signer: "); + + switch(ocsp.ocsp.tbsResponseData.responderID.element) { + case choice_OCSPResponderID_byName: { + hx509_name n; + char *s; + _hx509_name_from_Name(&ocsp.ocsp.tbsResponseData.responderID.u.byName, &n); + hx509_name_to_string(n, &s); + hx509_name_free(&n); + fprintf(out, " byName: %s\n", s); + free(s); + break; + } + case choice_OCSPResponderID_byKey: { + char *s; + hex_encode(ocsp.ocsp.tbsResponseData.responderID.u.byKey.data, + ocsp.ocsp.tbsResponseData.responderID.u.byKey.length, + &s); + fprintf(out, " byKey: %s\n", s); + free(s); + break; + } + default: + _hx509_abort("choice_OCSPResponderID unknown"); + break; + } + + fprintf(out, "producedAt: %s\n", + printable_time(ocsp.ocsp.tbsResponseData.producedAt)); + + fprintf(out, "replies: %d\n", ocsp.ocsp.tbsResponseData.responses.len); + + for (i = 0; i < ocsp.ocsp.tbsResponseData.responses.len; i++) { + char *status; + switch (ocsp.ocsp.tbsResponseData.responses.val[i].certStatus.element) { + case choice_OCSPCertStatus_good: + status = "good"; + break; + case choice_OCSPCertStatus_revoked: + status = "revoked"; + break; + case choice_OCSPCertStatus_unknown: + status = "unknown"; + break; + default: + status = "element unknown"; + } + + fprintf(out, "\t%d. status: %s\n", i, status); + + fprintf(out, "\tthisUpdate: %s\n", + printable_time(ocsp.ocsp.tbsResponseData.responses.val[i].thisUpdate)); + if (ocsp.ocsp.tbsResponseData.responses.val[i].nextUpdate) + fprintf(out, "\tproducedAt: %s\n", + printable_time(ocsp.ocsp.tbsResponseData.responses.val[i].thisUpdate)); + + } + + fprintf(out, "appended certs:\n"); + if (ocsp.certs) + ret = hx509_certs_iter(context, ocsp.certs, hx509_ci_print_names, out); + + free_ocsp(&ocsp); + return ret; +} + +int +hx509_ocsp_verify(hx509_context context, + time_t now, + hx509_cert cert, + int flags, + const void *data, size_t length, + time_t *expiration) +{ + const Certificate *c = _hx509_get_cert(cert); + OCSPBasicOCSPResponse basic; + int ret, i; + + *expiration = 0; + + ret = parse_ocsp_basic(data, length, &basic); + if (ret) + return ret; + + + for (i = 0; i < basic.tbsResponseData.responses.len; i++) { + + ret = der_heim_integer_cmp(&basic.tbsResponseData.responses.val[i].certID.serialNumber, + &c->tbsCertificate.serialNumber); + if (ret != 0) + continue; + + /* verify issuer hashes hash */ + ret = _hx509_verify_signature(context, + NULL, + &basic.tbsResponseData.responses.val[i].certID.hashAlgorithm, + &c->tbsCertificate.issuer._save, + &basic.tbsResponseData.responses.val[i].certID.issuerNameHash); + if (ret != 0) + continue; + + switch (basic.tbsResponseData.responses.val[i].certStatus.element) { + case choice_OCSPCertStatus_good: + break; + case choice_OCSPCertStatus_revoked: + case choice_OCSPCertStatus_unknown: + continue; + } + + /* don't allow the update to be in the future */ + if (basic.tbsResponseData.responses.val[i].thisUpdate > + now + context->ocsp_time_diff) + continue; + + /* don't allow the next updte to be in the past */ + if (basic.tbsResponseData.responses.val[i].nextUpdate) { + if (*basic.tbsResponseData.responses.val[i].nextUpdate < now) + continue; + } else + continue; + + *expiration = *basic.tbsResponseData.responses.val[i].nextUpdate; + + return 0; + } + free_OCSPBasicOCSPResponse(&basic); + + return 0; +} |