/* crypto/asn1/x_crl.c */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* 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 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 acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS 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 AUTHOR OR 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.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.]
*/
#include <stdio.h>
#include "cryptlib.h"
#include "asn1_locl.h"
#include <openssl/asn1t.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>
static int X509_REVOKED_cmp(const X509_REVOKED * const *a,
const X509_REVOKED * const *b);
static void setup_idp(X509_CRL *crl, ISSUING_DIST_POINT *idp);
ASN1_SEQUENCE(X509_REVOKED) = {
ASN1_SIMPLE(X509_REVOKED,serialNumber, ASN1_INTEGER),
ASN1_SIMPLE(X509_REVOKED,revocationDate, ASN1_TIME),
ASN1_SEQUENCE_OF_OPT(X509_REVOKED,extensions, X509_EXTENSION)
} ASN1_SEQUENCE_END(X509_REVOKED)
static int def_crl_verify(X509_CRL *crl, EVP_PKEY *r);
static int def_crl_lookup(X509_CRL *crl,
X509_REVOKED **ret, ASN1_INTEGER *serial, X509_NAME *issuer);
static X509_CRL_METHOD int_crl_meth =
{
0,
0,0,
def_crl_lookup,
def_crl_verify
};
static const X509_CRL_METHOD *default_crl_method = &int_crl_meth;
/* The X509_CRL_INFO structure needs a bit of customisation.
* Since we cache the original encoding the signature wont be affected by
* reordering of the revoked field.
*/
static int crl_inf_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
void *exarg)
{
X509_CRL_INFO *a = (X509_CRL_INFO *)*pval;
if(!a || !a->revoked) return 1;
switch(operation) {
/* Just set cmp function here. We don't sort because that
* would affect the output of X509_CRL_print().
*/
case ASN1_OP_D2I_POST:
(void)sk_X509_REVOKED_set_cmp_func(a->revoked,X509_REVOKED_cmp);
break;
}
return 1;
}
ASN1_SEQUENCE_enc(X509_CRL_INFO, enc, crl_inf_cb) = {
ASN1_OPT(X509_CRL_INFO, version, ASN1_INTEGER),
ASN1_SIMPLE(X509_CRL_INFO, sig_alg, X509_ALGOR),
ASN1_SIMPLE(X509_CRL_INFO, issuer, X509_NAME),
ASN1_SIMPLE(X509_CRL_INFO, lastUpdate, ASN1_TIME),
ASN1_OPT(X509_CRL_INFO, nextUpdate, ASN1_TIME),
ASN1_SEQUENCE_OF_OPT(X509_CRL_INFO, revoked, X509_REVOKED),
ASN1_EXP_SEQUENCE_OF_OPT(X509_CRL_INFO, extensions, X509_EXTENSION, 0)
} ASN1_SEQUENCE_END_enc(X509_CRL_INFO, X509_CRL_INFO)
/* Set CRL entry issuer according to CRL certificate issuer extension.
* Check for unhandled critical CRL entry extensions.
*/
static int crl_set_issuers(X509_CRL *crl)
{
int i, j;
GENERAL_NAMES *gens, *gtmp;
STACK_OF(X509_REVOKED) *revoked;
revoked = X509_CRL_get_REVOKED(crl);
gens = NULL;
for (i = 0; i < sk_X509_REVOKED_num(revoked); i++)
{
X509_REVOKED *rev = sk_X509_REVOKED_value(revoked, i);
STACK_OF(X509_EXTENSION) *exts;
ASN1_ENUMERATED *reason;
X509_EXTENSION *ext;
gtmp = X509_REVOKED_get_ext_d2i(rev,
NID_certificate_issuer,
&j, NULL);
if (!gtmp && (j != -1))
{
crl->flags |= EXFLAG_INVALID;
return 1;
}
if (gtmp)
{
gens = gtmp;
if (!crl->issuers)
{
crl->issuers = sk_GENERAL_NAMES_new_null();
if (!crl->issuers)
return 0;
}
if (!sk_GENERAL_NAMES_push(crl->issuers, gtmp))
return 0;
}
rev->issuer = gens;
reason = X509_REVOKED_get_ext_d2i(rev, NID_crl_reason,
&j, NULL);
if (!reason && (j != -1))
{
crl->flags |= EXFLAG_INVALID;
return 1;
}
if (reason)
{
rev->reason = ASN1_ENUMERATED_get(reason);
ASN1_ENUMERATED_free(reason);
}
else
rev->reason = CRL_REASON_NONE;
/* Check for critical CRL entry extensions */
exts = rev->extensions;
for (j = 0; j < sk_X509_EXTENSION_num(exts); j++)
{
ext = sk_X509_EXTENSION_value(exts, j);
if (ext->critical > 0)
{
if (OBJ_obj2nid(ext->object) ==
NID_certificate_issuer)
continue;
crl->flags |= EXFLAG_CRITICAL;
break;
}
}
}
return 1;
}
/* The X509_CRL structure needs a bit of customisation. Cache some extensions
* and hash of the whole CRL.
*/
static int crl_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
void *exarg)
{
X509_CRL *crl = (X509_CRL *)*pval;
STACK_OF(X509_EXTENSION) *exts;
X509_EXTENSION *ext;
int idx;
switch(operation)
{
case ASN1_OP_NEW_POST:
crl->idp = NULL;
crl->akid = NULL;
crl->flags = 0;
crl->idp_flags = 0;
crl->idp_reasons = CRLDP_ALL_REASONS;
crl->meth = default_crl_method;
crl->meth_data = NULL;
crl->issuers = NULL;
crl->crl_number = NULL;
crl->base_crl_number = NULL;
break;
case ASN1_OP_D2I_POST:
#ifndef OPENSSL_NO_SHA
X509_CRL_digest(crl, EVP_sha1(), crl->sha1_hash, NULL);
#endif
crl->idp = X509_CRL_get_ext_d2i(crl,
NID_issuing_distribution_point, NULL, NULL);
if (crl->idp)
setup_idp(crl, crl->idp);
crl->akid = X509_CRL_get_ext_d2i(crl,
NID_authority_key_identifier, NULL, NULL);
crl->crl_number = X509_CRL_get_ext_d2i(crl,
NID_crl_number, NULL, NULL);
crl->base_crl_number = X509_CRL_get_ext_d2i(crl,
NID_delta_crl, NULL, NULL);
/* Delta CRLs must have CRL number */
if (crl->base_crl_number && !crl->crl_number)
crl->flags |= EXFLAG_INVALID;
/* See if we have any unhandled critical CRL extensions and
* indicate this in a flag. We only currently handle IDP so
* anything else critical sets the flag.
*
* This code accesses the X509_CRL structure directly:
* applications shouldn't do this.
*/
exts = crl->crl->extensions;
for (idx = 0; idx < sk_X509_EXTENSION_num(exts); idx++)
{
int nid;
ext = sk_X509_EXTENSION_value(exts, idx);
nid = OBJ_obj2nid(ext->object);
if (nid == NID_freshest_crl)
crl->flags |= EXFLAG_FRESHEST;
if (ext->critical > 0)
{
/* We handle IDP and deltas */
if ((nid == NID_issuing_distribution_point)
|| (nid == NID_delta_crl))
break;;
crl->flags |= EXFLAG_CRITICAL;
break;
}
}
if (!crl_set_issuers(crl))
return 0;
if (crl->meth->crl_init)
{
if (crl->meth->crl_init(crl) == 0)
return 0;
}
break;
case ASN1_OP_FREE_POST:
if (crl->meth->crl_free)
{
if (!crl->meth->crl_free(crl))
return 0;
}
if (crl->akid)
AUTHORITY_KEYID_free(crl->akid);
if (crl->idp)
ISSUING_DIST_POINT_free(crl->idp);
ASN1_INTEGER_free(crl->crl_number);
ASN1_INTEGER_free(crl->base_crl_number);
sk_GENERAL_NAMES_pop_free(crl->issuers, GENERAL_NAMES_free);
break;
}
return 1;
}
/* Convert IDP into a more convenient form */
static void setup_idp(X509_CRL *crl, ISSUING_DIST_POINT *idp)
{
int idp_only = 0;
/* Set various flags according to IDP */
crl->idp_flags |= IDP_PRESENT;
if (idp->onlyuser > 0)
{
idp_only++;
crl->idp_flags |= IDP_ONLYUSER;
}
if (idp->onlyCA > 0)
{
idp_only++;
crl->idp_flags |= IDP_ONLYCA;
}
if (idp->onlyattr > 0)
{
idp_only++;
crl->idp_flags |= IDP_ONLYATTR;
}
if (idp_only > 1)
crl->idp_flags |= IDP_INVALID;
if (idp->indirectCRL > 0)
crl->idp_flags |= IDP_INDIRECT;
if (idp->onlysomereasons)
{
crl->idp_flags |= IDP_REASONS;
if (idp->onlysomereasons->length > 0)
crl->idp_reasons = idp->onlysomereasons->data[0];
if (idp->onlysomereasons->length > 1)
crl->idp_reasons |=
(idp->onlysomereasons->data[1] << 8);
crl->idp_reasons &= CRLDP_ALL_REASONS;
}
DIST_POINT_set_dpname(idp->distpoint, X509_CRL_get_issuer(crl));
}
ASN1_SEQUENCE_ref(X509_CRL, crl_cb, CRYPTO_LOCK_X509_CRL) = {
ASN1_SIMPLE(X509_CRL, crl, X509_CRL_INFO),
ASN1_SIMPLE(X509_CRL, sig_alg, X509_ALGOR),
ASN1_SIMPLE(X509_CRL, signature, ASN1_BIT_STRING)
} ASN1_SEQUENCE_END_ref(X509_CRL, X509_CRL)
IMPLEMENT_ASN1_FUNCTIONS(X509_REVOKED)
IMPLEMENT_ASN1_FUNCTIONS(X509_CRL_INFO)
IMPLEMENT_ASN1_FUNCTIONS(X509_CRL)
IMPLEMENT_ASN1_DUP_FUNCTION(X509_CRL)
static int X509_REVOKED_cmp(const X509_REVOKED * const *a,
const X509_REVOKED * const *b)
{
return(ASN1_STRING_cmp(
(ASN1_STRING *)(*a)->serialNumber,
(ASN1_STRING *)(*b)->serialNumber));
}
int X509_CRL_add0_revoked(X509_CRL *crl, X509_REVOKED *rev)
{
X509_CRL_INFO *inf;
inf = crl->crl;
if(!inf->revoked)
inf->revoked = sk_X509_REVOKED_new(X509_REVOKED_cmp);
if(!inf->revoked || !sk_X509_REVOKED_push(inf->revoked, rev)) {
ASN1err(ASN1_F_X509_CRL_ADD0_REVOKED, ERR_R_MALLOC_FAILURE);
return 0;
}
inf->enc.modified = 1;
return 1;
}
int X509_CRL_verify(X509_CRL *crl, EVP_PKEY *r)
{
if (crl->meth->crl_verify)
return crl->meth->crl_verify(crl, r);
return 0;
}
int X509_CRL_get0_by_serial(X509_CRL *crl,
X509_REVOKED **ret, ASN1_INTEGER *serial)
{
if (crl->meth->crl_lookup)
return crl->meth->crl_lookup(crl, ret, serial, NULL);
return 0;
}
int X509_CRL_get0_by_cert(X509_CRL *crl, X509_REVOKED **ret, X509 *x)
{
if (crl->meth->crl_lookup)
return crl->meth->crl_lookup(crl, ret,
X509_get_serialNumber(x),
X509_get_issuer_name(x));
return 0;
}
static int def_crl_verify(X509_CRL *crl, EVP_PKEY *r)
{
return(ASN1_item_verify(ASN1_ITEM_rptr(X509_CRL_INFO),
crl->sig_alg, crl->signature,crl->crl,r));
}
static int crl_revoked_issuer_match(X509_CRL *crl, X509_NAME *nm,
X509_REVOKED *rev)
{
int i;
if (!rev->issuer)
{
if (!nm)
return 1;
if (!X509_NAME_cmp(nm, X509_CRL_get_issuer(crl)))
return 1;
return 0;
}
if (!nm)
nm = X509_CRL_get_issuer(crl);
for (i = 0; i < sk_GENERAL_NAME_num(rev->issuer); i++)
{
GENERAL_NAME *gen = sk_GENERAL_NAME_value(rev->issuer, i);
if (gen->type != GEN_DIRNAME)
continue;
if (!X509_NAME_cmp(nm, gen->d.directoryName))
return 1;
}
return 0;
}
static int def_crl_lookup(X509_CRL *crl,
X509_REVOKED **ret, ASN1_INTEGER *serial, X509_NAME *issuer)
{
X509_REVOKED rtmp, *rev;
int idx;
rtmp.serialNumber = serial;
/* Sort revoked into serial number order if not already sorted.
* Do this under a lock to avoid race condition.
*/
if (!sk_X509_REVOKED_is_sorted(crl->crl->revoked))
{
CRYPTO_w_lock(CRYPTO_LOCK_X509_CRL);
sk_X509_REVOKED_sort(crl->crl->revoked);
CRYPTO_w_unlock(CRYPTO_LOCK_X509_CRL);
}
idx = sk_X509_REVOKED_find(crl->crl->revoked, &rtmp);
if(idx < 0)
return 0;
/* Need to look for matching name */
for(;idx < sk_X509_REVOKED_num(crl->crl->revoked); idx++)
{
rev = sk_X509_REVOKED_value(crl->crl->revoked, idx);
if (ASN1_INTEGER_cmp(rev->serialNumber, serial))
return 0;
if (crl_revoked_issuer_match(crl, issuer, rev))
{
if (ret)
*ret = rev;
if (rev->reason == CRL_REASON_REMOVE_FROM_CRL)
return 2;
return 1;
}
}
return 0;
}
void X509_CRL_set_default_method(const X509_CRL_METHOD *meth)
{
if (meth == NULL)
default_crl_method = &int_crl_meth;
else
default_crl_method = meth;
}
X509_CRL_METHOD *X509_CRL_METHOD_new(
int (*crl_init)(X509_CRL *crl),
int (*crl_free)(X509_CRL *crl),
int (*crl_lookup)(X509_CRL *crl, X509_REVOKED **ret,
ASN1_INTEGER *ser, X509_NAME *issuer),
int (*crl_verify)(X509_CRL *crl, EVP_PKEY *pk))
{
X509_CRL_METHOD *m;
m = OPENSSL_malloc(sizeof(X509_CRL_METHOD));
if (!m)
return NULL;
m->crl_init = crl_init;
m->crl_free = crl_free;
m->crl_lookup = crl_lookup;
m->crl_verify = crl_verify;
m->flags = X509_CRL_METHOD_DYNAMIC;
return m;
}
void X509_CRL_METHOD_free(X509_CRL_METHOD *m)
{
if (!(m->flags & X509_CRL_METHOD_DYNAMIC))
return;
OPENSSL_free(m);
}
void X509_CRL_set_meth_data(X509_CRL *crl, void *dat)
{
crl->meth_data = dat;
}
void *X509_CRL_get_meth_data(X509_CRL *crl)
{
return crl->meth_data;
}
IMPLEMENT_STACK_OF(X509_REVOKED)
IMPLEMENT_ASN1_SET_OF(X509_REVOKED)
IMPLEMENT_STACK_OF(X509_CRL)
IMPLEMENT_ASN1_SET_OF(X509_CRL)
