/* $OpenBSD: ocsp_ext.c,v 1.15 2016/12/27 16:01:19 jsing Exp $ */ /* Written by Tom Titchener for the OpenSSL * project. */ /* History: This file was transfered to Richard Levitte from CertCo by Kathy Weinhold in mid-spring 2000 to be included in OpenSSL or released as a patch kit. */ /* ==================================================================== * Copyright (c) 1998-2000 The OpenSSL Project. 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. All advertising materials mentioning features or use of this * software must display the following acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" * * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to * endorse or promote products derived from this software without * prior written permission. For written permission, please contact * openssl-core@openssl.org. * * 5. Products derived from this software may not be called "OpenSSL" * nor may "OpenSSL" appear in their names without prior written * permission of the OpenSSL Project. * * 6. Redistributions of any form whatsoever must retain the following * acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit (http://www.openssl.org/)" * * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY * EXPRESSED 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 OpenSSL PROJECT OR * ITS 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. * ==================================================================== * * This product includes cryptographic software written by Eric Young * (eay@cryptsoft.com). This product includes software written by Tim * Hudson (tjh@cryptsoft.com). * */ #include #include #include #include #include #include #include /* Standard wrapper functions for extensions */ /* OCSP request extensions */ int OCSP_REQUEST_get_ext_count(OCSP_REQUEST *x) { return X509v3_get_ext_count(x->tbsRequest->requestExtensions); } int OCSP_REQUEST_get_ext_by_NID(OCSP_REQUEST *x, int nid, int lastpos) { return X509v3_get_ext_by_NID(x->tbsRequest->requestExtensions, nid, lastpos); } int OCSP_REQUEST_get_ext_by_OBJ(OCSP_REQUEST *x, ASN1_OBJECT *obj, int lastpos) { return X509v3_get_ext_by_OBJ(x->tbsRequest->requestExtensions, obj, lastpos); } int OCSP_REQUEST_get_ext_by_critical(OCSP_REQUEST *x, int crit, int lastpos) { return X509v3_get_ext_by_critical(x->tbsRequest->requestExtensions, crit, lastpos); } X509_EXTENSION * OCSP_REQUEST_get_ext(OCSP_REQUEST *x, int loc) { return X509v3_get_ext(x->tbsRequest->requestExtensions, loc); } X509_EXTENSION * OCSP_REQUEST_delete_ext(OCSP_REQUEST *x, int loc) { return X509v3_delete_ext(x->tbsRequest->requestExtensions, loc); } void * OCSP_REQUEST_get1_ext_d2i(OCSP_REQUEST *x, int nid, int *crit, int *idx) { return X509V3_get_d2i(x->tbsRequest->requestExtensions, nid, crit, idx); } int OCSP_REQUEST_add1_ext_i2d(OCSP_REQUEST *x, int nid, void *value, int crit, unsigned long flags) { return X509V3_add1_i2d(&x->tbsRequest->requestExtensions, nid, value, crit, flags); } int OCSP_REQUEST_add_ext(OCSP_REQUEST *x, X509_EXTENSION *ex, int loc) { return X509v3_add_ext(&(x->tbsRequest->requestExtensions), ex, loc) != NULL; } /* Single extensions */ int OCSP_ONEREQ_get_ext_count(OCSP_ONEREQ *x) { return X509v3_get_ext_count(x->singleRequestExtensions); } int OCSP_ONEREQ_get_ext_by_NID(OCSP_ONEREQ *x, int nid, int lastpos) { return X509v3_get_ext_by_NID(x->singleRequestExtensions, nid, lastpos); } int OCSP_ONEREQ_get_ext_by_OBJ(OCSP_ONEREQ *x, ASN1_OBJECT *obj, int lastpos) { return X509v3_get_ext_by_OBJ(x->singleRequestExtensions, obj, lastpos); } int OCSP_ONEREQ_get_ext_by_critical(OCSP_ONEREQ *x, int crit, int lastpos) { return X509v3_get_ext_by_critical(x->singleRequestExtensions, crit, lastpos); } X509_EXTENSION * OCSP_ONEREQ_get_ext(OCSP_ONEREQ *x, int loc) { return X509v3_get_ext(x->singleRequestExtensions, loc); } X509_EXTENSION * OCSP_ONEREQ_delete_ext(OCSP_ONEREQ *x, int loc) { return X509v3_delete_ext(x->singleRequestExtensions, loc); } void * OCSP_ONEREQ_get1_ext_d2i(OCSP_ONEREQ *x, int nid, int *crit, int *idx) { return X509V3_get_d2i(x->singleRequestExtensions, nid, crit, idx); } int OCSP_ONEREQ_add1_ext_i2d(OCSP_ONEREQ *x, int nid, void *value, int crit, unsigned long flags) { return X509V3_add1_i2d(&x->singleRequestExtensions, nid, value, crit, flags); } int OCSP_ONEREQ_add_ext(OCSP_ONEREQ *x, X509_EXTENSION *ex, int loc) { return X509v3_add_ext(&(x->singleRequestExtensions), ex, loc) != NULL; } /* OCSP Basic response */ int OCSP_BASICRESP_get_ext_count(OCSP_BASICRESP *x) { return X509v3_get_ext_count(x->tbsResponseData->responseExtensions); } int OCSP_BASICRESP_get_ext_by_NID(OCSP_BASICRESP *x, int nid, int lastpos) { return X509v3_get_ext_by_NID(x->tbsResponseData->responseExtensions, nid, lastpos); } int OCSP_BASICRESP_get_ext_by_OBJ(OCSP_BASICRESP *x, ASN1_OBJECT *obj, int lastpos) { return X509v3_get_ext_by_OBJ(x->tbsResponseData->responseExtensions, obj, lastpos); } int OCSP_BASICRESP_get_ext_by_critical(OCSP_BASICRESP *x, int crit, int lastpos) { return X509v3_get_ext_by_critical( x->tbsResponseData->responseExtensions, crit, lastpos); } X509_EXTENSION * OCSP_BASICRESP_get_ext(OCSP_BASICRESP *x, int loc) { return X509v3_get_ext(x->tbsResponseData->responseExtensions, loc); } X509_EXTENSION * OCSP_BASICRESP_delete_ext(OCSP_BASICRESP *x, int loc) { return X509v3_delete_ext(x->tbsResponseData->responseExtensions, loc); } void * OCSP_BASICRESP_get1_ext_d2i(OCSP_BASICRESP *x, int nid, int *crit, int *idx) { return X509V3_get_d2i(x->tbsResponseData->responseExtensions, nid, crit, idx); } int OCSP_BASICRESP_add1_ext_i2d(OCSP_BASICRESP *x, int nid, void *value, int crit, unsigned long flags) { return X509V3_add1_i2d(&x->tbsResponseData->responseExtensions, nid, value, crit, flags); } int OCSP_BASICRESP_add_ext(OCSP_BASICRESP *x, X509_EXTENSION *ex, int loc) { return X509v3_add_ext(&(x->tbsResponseData->responseExtensions), ex, loc) != NULL; } /* OCSP single response extensions */ int OCSP_SINGLERESP_get_ext_count(OCSP_SINGLERESP *x) { return X509v3_get_ext_count(x->singleExtensions); } int OCSP_SINGLERESP_get_ext_by_NID(OCSP_SINGLERESP *x, int nid, int lastpos) { return X509v3_get_ext_by_NID(x->singleExtensions, nid, lastpos); } int OCSP_SINGLERESP_get_ext_by_OBJ(OCSP_SINGLERESP *x, ASN1_OBJECT *obj, int lastpos) { return X509v3_get_ext_by_OBJ(x->singleExtensions, obj, lastpos); } int OCSP_SINGLERESP_get_ext_by_critical(OCSP_SINGLERESP *x, int crit, int lastpos) { return X509v3_get_ext_by_critical(x->singleExtensions, crit, lastpos); } X509_EXTENSION * OCSP_SINGLERESP_get_ext(OCSP_SINGLERESP *x, int loc) { return X509v3_get_ext(x->singleExtensions, loc); } X509_EXTENSION * OCSP_SINGLERESP_delete_ext(OCSP_SINGLERESP *x, int loc) { return X509v3_delete_ext(x->singleExtensions, loc); } void * OCSP_SINGLERESP_get1_ext_d2i(OCSP_SINGLERESP *x, int nid, int *crit, int *idx) { return X509V3_get_d2i(x->singleExtensions, nid, crit, idx); } int OCSP_SINGLERESP_add1_ext_i2d(OCSP_SINGLERESP *x, int nid, void *value, int crit, unsigned long flags) { return X509V3_add1_i2d(&x->singleExtensions, nid, value, crit, flags); } int OCSP_SINGLERESP_add_ext(OCSP_SINGLERESP *x, X509_EXTENSION *ex, int loc) { return X509v3_add_ext(&(x->singleExtensions), ex, loc) != NULL; } /* Nonce handling functions */ /* Add a nonce to an extension stack. A nonce can be specificed or if NULL * a random nonce will be generated. * Note: OpenSSL 0.9.7d and later create an OCTET STRING containing the * nonce, previous versions used the raw nonce. */ static int ocsp_add1_nonce(STACK_OF(X509_EXTENSION) **exts, unsigned char *val, int len) { unsigned char *tmpval; ASN1_OCTET_STRING os; int ret = 0; if (len <= 0) len = OCSP_DEFAULT_NONCE_LENGTH; /* Create the OCTET STRING manually by writing out the header and * appending the content octets. This avoids an extra memory allocation * operation in some cases. Applications should *NOT* do this because * it relies on library internals. */ os.length = ASN1_object_size(0, len, V_ASN1_OCTET_STRING); os.data = malloc(os.length); if (os.data == NULL) goto err; tmpval = os.data; ASN1_put_object(&tmpval, 0, len, V_ASN1_OCTET_STRING, V_ASN1_UNIVERSAL); if (val) memcpy(tmpval, val, len); else arc4random_buf(tmpval, len); if (!X509V3_add1_i2d(exts, NID_id_pkix_OCSP_Nonce, &os, 0, X509V3_ADD_REPLACE)) goto err; ret = 1; err: free(os.data); return ret; } /* Add nonce to an OCSP request */ int OCSP_request_add1_nonce(OCSP_REQUEST *req, unsigned char *val, int len) { return ocsp_add1_nonce(&req->tbsRequest->requestExtensions, val, len); } /* Same as above but for a response */ int OCSP_basic_add1_nonce(OCSP_BASICRESP *resp, unsigned char *val, int len) { return ocsp_add1_nonce(&resp->tbsResponseData->responseExtensions, val, len); } /* Check nonce validity in a request and response. * Return value reflects result: * 1: nonces present and equal. * 2: nonces both absent. * 3: nonce present in response only. * 0: nonces both present and not equal. * -1: nonce in request only. * * For most responders clients can check return > 0. * If responder doesn't handle nonces return != 0 may be * necessary. return == 0 is always an error. */ int OCSP_check_nonce(OCSP_REQUEST *req, OCSP_BASICRESP *bs) { /* * Since we are only interested in the presence or absence of * the nonce and comparing its value there is no need to use * the X509V3 routines: this way we can avoid them allocating an * ASN1_OCTET_STRING structure for the value which would be * freed immediately anyway. */ int req_idx, resp_idx; X509_EXTENSION *req_ext, *resp_ext; req_idx = OCSP_REQUEST_get_ext_by_NID(req, NID_id_pkix_OCSP_Nonce, -1); resp_idx = OCSP_BASICRESP_get_ext_by_NID(bs, NID_id_pkix_OCSP_Nonce, -1); /* Check both absent */ if (req_idx < 0 && resp_idx < 0) return 2; /* Check in request only */ if (req_idx >= 0 && resp_idx < 0) return -1; /* Check in response but not request */ if (req_idx < 0 && resp_idx >= 0) return 3; /* Otherwise nonce in request and response so retrieve the extensions */ req_ext = OCSP_REQUEST_get_ext(req, req_idx); resp_ext = OCSP_BASICRESP_get_ext(bs, resp_idx); if (ASN1_OCTET_STRING_cmp(req_ext->value, resp_ext->value)) return 0; return 1; } /* Copy the nonce value (if any) from an OCSP request to * a response. */ int OCSP_copy_nonce(OCSP_BASICRESP *resp, OCSP_REQUEST *req) { X509_EXTENSION *req_ext; int req_idx; /* Check for nonce in request */ req_idx = OCSP_REQUEST_get_ext_by_NID(req, NID_id_pkix_OCSP_Nonce, -1); /* If no nonce that's OK */ if (req_idx < 0) return 2; req_ext = OCSP_REQUEST_get_ext(req, req_idx); return OCSP_BASICRESP_add_ext(resp, req_ext, -1); } X509_EXTENSION * OCSP_crlID_new(char *url, long *n, char *tim) { X509_EXTENSION *x = NULL; OCSP_CRLID *cid = NULL; if (!(cid = OCSP_CRLID_new())) goto err; if (url) { if (!(cid->crlUrl = ASN1_IA5STRING_new())) goto err; if (!(ASN1_STRING_set(cid->crlUrl, url, -1))) goto err; } if (n) { if (!(cid->crlNum = ASN1_INTEGER_new())) goto err; if (!(ASN1_INTEGER_set(cid->crlNum, *n))) goto err; } if (tim) { if (!(cid->crlTime = ASN1_GENERALIZEDTIME_new())) goto err; if (!(ASN1_GENERALIZEDTIME_set_string(cid->crlTime, tim))) goto err; } x = X509V3_EXT_i2d(NID_id_pkix_OCSP_CrlID, 0, cid); err: if (cid) OCSP_CRLID_free(cid); return x; } /* AcceptableResponses ::= SEQUENCE OF OBJECT IDENTIFIER */ X509_EXTENSION * OCSP_accept_responses_new(char **oids) { int nid; STACK_OF(ASN1_OBJECT) *sk = NULL; ASN1_OBJECT *o = NULL; X509_EXTENSION *x = NULL; if (!(sk = sk_ASN1_OBJECT_new_null())) return NULL; while (oids && *oids) { if ((nid = OBJ_txt2nid(*oids)) != NID_undef && (o = OBJ_nid2obj(nid))) if (sk_ASN1_OBJECT_push(sk, o) == 0) { sk_ASN1_OBJECT_pop_free(sk, ASN1_OBJECT_free); return NULL; } oids++; } x = X509V3_EXT_i2d(NID_id_pkix_OCSP_acceptableResponses, 0, sk); sk_ASN1_OBJECT_pop_free(sk, ASN1_OBJECT_free); return x; } /* ArchiveCutoff ::= GeneralizedTime */ X509_EXTENSION * OCSP_archive_cutoff_new(char* tim) { X509_EXTENSION *x = NULL; ASN1_GENERALIZEDTIME *gt = NULL; if (!(gt = ASN1_GENERALIZEDTIME_new())) return NULL; if (!(ASN1_GENERALIZEDTIME_set_string(gt, tim))) goto err; x = X509V3_EXT_i2d(NID_id_pkix_OCSP_archiveCutoff, 0, gt); err: if (gt) ASN1_GENERALIZEDTIME_free(gt); return x; } /* per ACCESS_DESCRIPTION parameter are oids, of which there are currently * two--NID_ad_ocsp, NID_id_ad_caIssuers--and GeneralName value. This * method forces NID_ad_ocsp and uniformResourceLocator [6] IA5String. */ X509_EXTENSION * OCSP_url_svcloc_new(X509_NAME* issuer, char **urls) { X509_EXTENSION *x = NULL; ASN1_IA5STRING *ia5 = NULL; OCSP_SERVICELOC *sloc = NULL; ACCESS_DESCRIPTION *ad = NULL; if (!(sloc = OCSP_SERVICELOC_new())) goto err; if (!(sloc->issuer = X509_NAME_dup(issuer))) goto err; if (urls && *urls && !(sloc->locator = sk_ACCESS_DESCRIPTION_new_null())) goto err; while (urls && *urls) { if (!(ad = ACCESS_DESCRIPTION_new())) goto err; if (!(ad->method = OBJ_nid2obj(NID_ad_OCSP))) goto err; if (!(ad->location = GENERAL_NAME_new())) goto err; if (!(ia5 = ASN1_IA5STRING_new())) goto err; if (!ASN1_STRING_set((ASN1_STRING*)ia5, *urls, -1)) goto err; ad->location->type = GEN_URI; ad->location->d.ia5 = ia5; ia5 = NULL; if (!sk_ACCESS_DESCRIPTION_push(sloc->locator, ad)) goto err; ad = NULL; urls++; } x = X509V3_EXT_i2d(NID_id_pkix_OCSP_serviceLocator, 0, sloc); err: if (ia5) ASN1_IA5STRING_free(ia5); if (ad) ACCESS_DESCRIPTION_free(ad); if (sloc) OCSP_SERVICELOC_free(sloc); return x; }