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openssl/crypto/ocsp/ocsp_ext.c

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/*
* Copyright 2000-2019 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <stdio.h>
#include "internal/cryptlib.h"
#include <openssl/objects.h>
#include <openssl/x509.h>
#include <openssl/ocsp.h>
#include "ocsp_local.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, const 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, const 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, const 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, const 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 */
/* Nonce handling functions */
/*
* Add a nonce to an extension stack. A nonce can be specified 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);
if (os.length < 0)
return 0;
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 if (RAND_bytes(tmpval, len) <= 0)
goto err;
if (!X509V3_add1_i2d(exts, NID_id_pkix_OCSP_Nonce,
&os, 0, X509V3_ADD_REPLACE))
goto err;
ret = 1;
err:
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(X509_EXTENSION_get_data(req_ext),
X509_EXTENSION_get_data(resp_ext)))
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(const char *url, long *n, char *tim)
{
X509_EXTENSION *x = NULL;
OCSP_CRLID *cid = NULL;
if ((cid = OCSP_CRLID_new()) == NULL)
goto err;
if (url) {
if ((cid->crlUrl = ASN1_IA5STRING_new()) == NULL)
goto err;
if (!(ASN1_STRING_set(cid->crlUrl, url, -1)))
goto err;
}
if (n) {
if ((cid->crlNum = ASN1_INTEGER_new()) == NULL)
goto err;
if (!(ASN1_INTEGER_set(cid->crlNum, *n)))
goto err;
}
if (tim) {
if ((cid->crlTime = ASN1_GENERALIZEDTIME_new()) == NULL)
goto err;
if (!(ASN1_GENERALIZEDTIME_set_string(cid->crlTime, tim)))
goto err;
}
x = X509V3_EXT_i2d(NID_id_pkix_OCSP_CrlID, 0, cid);
err:
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()) == 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:
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()) == NULL)
goto err;
if (!(ASN1_GENERALIZEDTIME_set_string(gt, tim)))
goto err;
x = X509V3_EXT_i2d(NID_id_pkix_OCSP_archiveCutoff, 0, gt);
err:
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, const char **urls)
{
X509_EXTENSION *x = NULL;
ASN1_IA5STRING *ia5 = NULL;
OCSP_SERVICELOC *sloc = NULL;
ACCESS_DESCRIPTION *ad = NULL;
if ((sloc = OCSP_SERVICELOC_new()) == NULL)
goto err;
X509_NAME_free(sloc->issuer);
if ((sloc->issuer = X509_NAME_dup(issuer)) == NULL)
goto err;
if (urls && *urls
&& (sloc->locator = sk_ACCESS_DESCRIPTION_new_null()) == NULL)
goto err;
while (urls && *urls) {
if ((ad = ACCESS_DESCRIPTION_new()) == NULL)
goto err;
if ((ad->method = OBJ_nid2obj(NID_ad_OCSP)) == NULL)
goto err;
if ((ia5 = ASN1_IA5STRING_new()) == NULL)
goto err;
if (!ASN1_STRING_set((ASN1_STRING *)ia5, *urls, -1))
goto err;
/* ad->location is allocated inside ACCESS_DESCRIPTION_new */
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:
ASN1_IA5STRING_free(ia5);
ACCESS_DESCRIPTION_free(ad);
OCSP_SERVICELOC_free(sloc);
return x;
}
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