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- /* 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 */
- 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;
- }
- /* 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;
- }
- if (!(x = X509_EXTENSION_new())) goto err;
- if (!(x->object = OBJ_nid2obj(NID_id_pkix_OCSP_CrlID))) goto err;
- if (!(ASN1_STRING_encode_of(OCSP_CRLID,x->value,i2d_OCSP_CRLID,cid,
- NULL)))
- goto err;
- OCSP_CRLID_free(cid);
- return x;
- err:
- if (x) X509_EXTENSION_free(x);
- if (cid) OCSP_CRLID_free(cid);
- return NULL;
- }
- /* 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++;
- }
- if (!(x = X509_EXTENSION_new())) goto err;
- if (!(x->object = OBJ_nid2obj(NID_id_pkix_OCSP_acceptableResponses)))
- goto err;
- if (!(ASN1_STRING_encode_of(ASN1_OBJECT,x->value,i2d_ASN1_OBJECT,NULL,
- sk)))
- goto err;
- sk_ASN1_OBJECT_pop_free(sk, ASN1_OBJECT_free);
- return x;
- err:
- if (x) X509_EXTENSION_free(x);
- if (sk) sk_ASN1_OBJECT_pop_free(sk, ASN1_OBJECT_free);
- return NULL;
- }
- /* 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;
- if (!(x = X509_EXTENSION_new())) goto err;
- if (!(x->object=OBJ_nid2obj(NID_id_pkix_OCSP_archiveCutoff)))goto err;
- if (!(ASN1_STRING_encode_of(ASN1_GENERALIZEDTIME,x->value,
- i2d_ASN1_GENERALIZEDTIME,gt,NULL))) goto err;
- ASN1_GENERALIZEDTIME_free(gt);
- return x;
- err:
- if (gt) ASN1_GENERALIZEDTIME_free(gt);
- if (x) X509_EXTENSION_free(x);
- return NULL;
- }
- /* 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++;
- }
- if (!(x = X509_EXTENSION_new())) goto err;
- if (!(x->object = OBJ_nid2obj(NID_id_pkix_OCSP_serviceLocator)))
- goto err;
- if (!(ASN1_STRING_encode_of(OCSP_SERVICELOC,x->value,
- i2d_OCSP_SERVICELOC,sloc,NULL))) goto err;
- OCSP_SERVICELOC_free(sloc);
- return x;
- err:
- if (x) X509_EXTENSION_free(x);
- if (sloc) OCSP_SERVICELOC_free(sloc);
- return NULL;
- }
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