/* ocsp_ext.c */
/* Written by Tom Titchener <[email protected]> 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
* [email protected].
*
* 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
* ([email protected]). This product includes software written by Tim
* Hudson ([email protected]).
*
*/
#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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