| /* ocsp_ext.c */ |
| /* Written by Tom Titchener <Tom_Titchener@groove.net> 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 <stdio.h> |
| #include <cryptlib.h> |
| #include <openssl/objects.h> |
| #include <openssl/x509.h> |
| #include <openssl/ocsp.h> |
| #include <openssl/rand.h> |
| #include <openssl/x509v3.h> |
| |
| /* 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); |
| } |
| |
| /* also CRL Entry Extensions */ |
| #if 0 |
| ASN1_STRING *ASN1_STRING_encode(ASN1_STRING *s, i2d_of_void *i2d, |
| void *data, STACK_OF(ASN1_OBJECT) *sk) |
| { |
| int i; |
| unsigned char *p, *b = NULL; |
| |
| if (data) |
| { |
| if ((i=i2d(data,NULL)) <= 0) goto err; |
| if (!(b=p=OPENSSL_malloc((unsigned int)i))) |
| goto err; |
| if (i2d(data, &p) <= 0) goto err; |
| } |
| else if (sk) |
| { |
| if ((i=i2d_ASN1_SET_OF_ASN1_OBJECT(sk,NULL, |
| (I2D_OF(ASN1_OBJECT))i2d, |
| V_ASN1_SEQUENCE, |
| V_ASN1_UNIVERSAL, |
| IS_SEQUENCE))<=0) goto err; |
| if (!(b=p=OPENSSL_malloc((unsigned int)i))) |
| goto err; |
| if (i2d_ASN1_SET_OF_ASN1_OBJECT(sk,&p,(I2D_OF(ASN1_OBJECT))i2d, |
| V_ASN1_SEQUENCE, |
| V_ASN1_UNIVERSAL, |
| IS_SEQUENCE)<=0) goto err; |
| } |
| else |
| { |
| OCSPerr(OCSP_F_ASN1_STRING_ENCODE,OCSP_R_BAD_DATA); |
| goto err; |
| } |
| if (!s && !(s = ASN1_STRING_new())) goto err; |
| if (!(ASN1_STRING_set(s, b, i))) goto err; |
| OPENSSL_free(b); |
| return s; |
| err: |
| if (b) OPENSSL_free(b); |
| return NULL; |
| } |
| #endif |
| |
| /* 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 = OPENSSL_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 |
| RAND_pseudo_bytes(tmpval, len); |
| if(!X509V3_add1_i2d(exts, NID_id_pkix_OCSP_Nonce, |
| &os, 0, X509V3_ADD_REPLACE)) |
| goto err; |
| ret = 1; |
| err: |
| if (os.data) |
| OPENSSL_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())) goto err; |
| while (oids && *oids) |
| { |
| if ((nid=OBJ_txt2nid(*oids))!=NID_undef&&(o=OBJ_nid2obj(nid))) |
| sk_ASN1_OBJECT_push(sk, o); |
| oids++; |
| } |
| x = X509V3_EXT_i2d(NID_id_pkix_OCSP_acceptableResponses, 0, sk); |
| err: |
| if (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())) goto err; |
| 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; |
| if (!sk_ACCESS_DESCRIPTION_push(sloc->locator, ad)) goto err; |
| urls++; |
| } |
| x = X509V3_EXT_i2d(NID_id_pkix_OCSP_serviceLocator, 0, sloc); |
| err: |
| if (sloc) OCSP_SERVICELOC_free(sloc); |
| return x; |
| } |
| |