static int check_revocation(X509_STORE_CTX *ctx);
static int check_cert(X509_STORE_CTX *ctx);
static int check_policy(X509_STORE_CTX *ctx);
+static int crl_akid_check(X509_STORE_CTX *ctx, AUTHORITY_KEYID *akid);
+static int idp_check_scope(X509 *x, X509_CRL *crl);
static int internal_verify(X509_STORE_CTX *ctx);
const char *X509_version="X.509" OPENSSL_VERSION_PTEXT;
return 1;
}
-/* Lookup CRLs from the supplied list. Look for matching isser name
- * and validity. If we can't find a valid CRL return the last one
- * with matching name. This gives more meaningful error codes. Otherwise
- * we'd get a CRL not found error if a CRL existed with matching name but
- * was invalid.
+/* Based on a set of possible CRLs decide which one is best suited
+ * to handle the current certificate. This is determined by a number
+ * of criteria. If any of the "must" criteria is not satisfied then
+ * the candidate CRL is rejected. If all "must" and all "should" are
+ * satisfied the CRL is accepted. If no CRL satisfies all criteria then
+ * a "best CRL" is used to provide some meaningful error information.
+ *
+ * CRL issuer name must match "nm" if not NULL.
+ * If IDP is present:
+ * a. it must be consistent.
+ * b. onlyuser, onlyCA, onlyAA should match certificate being checked.
+ * c. indirectCRL must be FALSE.
+ * d. onlysomereason must be absent.
+ * e. if name present a DP in certificate CRLDP must match.
+ * If AKID present it should match certificate AKID.
+ * Check time should fall between lastUpdate and nextUpdate.
*/
+/* IDP name field matches CRLDP or IDP name not present */
+#define CRL_SCORE_SCOPE 4
+/* AKID present and matches cert, or AKID not present */
+#define CRL_SCORE_AKID 2
+/* times OK */
+#define CRL_SCORE_TIME 1
+
+#define CRL_SCORE_ALL 7
+
+/* IDP flags which cause a CRL to be rejected */
+
+#define IDP_REJECT (IDP_INVALID|IDP_INDIRECT|IDP_REASONS)
+
static int get_crl_sk(X509_STORE_CTX *ctx, X509_CRL **pcrl,
X509_NAME *nm, STACK_OF(X509_CRL) *crls)
{
- int i;
+ int i, crl_score, best_score = -1;
X509_CRL *crl, *best_crl = NULL;
for (i = 0; i < sk_X509_CRL_num(crls); i++)
{
+ crl_score = 0;
crl = sk_X509_CRL_value(crls, i);
- if (X509_NAME_cmp(nm, X509_CRL_get_issuer(crl)))
+ if (nm && X509_NAME_cmp(nm, X509_CRL_get_issuer(crl)))
continue;
if (check_crl_time(ctx, crl, 0))
+ crl_score |= CRL_SCORE_TIME;
+
+ if (crl->idp_flags & IDP_PRESENT)
+ {
+ if (crl->idp_flags & IDP_REJECT)
+ continue;
+ if (idp_check_scope(ctx->current_cert, crl))
+ crl_score |= CRL_SCORE_SCOPE;
+ }
+ else
+ crl_score |= CRL_SCORE_SCOPE;
+
+ if (crl->akid)
+ {
+ if (crl_akid_check(ctx, crl->akid))
+ crl_score |= CRL_SCORE_AKID;
+ }
+ else
+ crl_score |= CRL_SCORE_AKID;
+
+ if (crl_score == CRL_SCORE_ALL)
{
*pcrl = crl;
- CRYPTO_add(&crl->references, 1, CRYPTO_LOCK_X509);
+ CRYPTO_add(&crl->references, 1, CRYPTO_LOCK_X509_CRL);
return 1;
}
- best_crl = crl;
+
+ if (crl_score > best_score)
+ {
+ best_crl = crl;
+ best_score = crl_score;
+ }
}
if (best_crl)
{
return 0;
}
-/* Retrieve CRL corresponding to certificate: currently just a
- * subject lookup: maybe use AKID later...
+static int crl_akid_check(X509_STORE_CTX *ctx, AUTHORITY_KEYID *akid)
+ {
+ int cidx = ctx->error_depth;
+ if (cidx != sk_X509_num(ctx->chain) - 1)
+ cidx++;
+ if (X509_check_akid(sk_X509_value(ctx->chain, cidx), akid) == X509_V_OK)
+ return 1;
+ return 0;
+ }
+
+
+/* Check IDP name matches at least one CRLDP name */
+
+static int idp_check_scope(X509 *x, X509_CRL *crl)
+ {
+ int i, j, k;
+ GENERAL_NAMES *inames, *dnames;
+ if (crl->idp_flags & IDP_ONLYATTR)
+ return 0;
+ if (x->ex_flags & EXFLAG_CA)
+ {
+ if (crl->idp_flags & IDP_ONLYUSER)
+ return 0;
+ }
+ else
+ {
+ if (crl->idp_flags & IDP_ONLYCA)
+ return 0;
+ }
+ if (!crl->idp->distpoint)
+ return 1;
+ if (crl->idp->distpoint->type != 0)
+ return 1;
+ if (!x->crldp)
+ return 0;
+ inames = crl->idp->distpoint->name.fullname;
+ for (i = 0; i < sk_GENERAL_NAME_num(inames); i++)
+ {
+ GENERAL_NAME *igen = sk_GENERAL_NAME_value(inames, i);
+ for (j = 0; j < sk_DIST_POINT_num(x->crldp); j++)
+ {
+ DIST_POINT *dp = sk_DIST_POINT_value(x->crldp, j);
+ /* We don't handle these at present */
+ if (dp->reasons || dp->CRLissuer)
+ continue;
+ if (!dp->distpoint || (dp->distpoint->type != 0))
+ continue;
+ dnames = dp->distpoint->name.fullname;
+ for (k = 0; k < sk_GENERAL_NAME_num(dnames); k++)
+ {
+ GENERAL_NAME *cgen =
+ sk_GENERAL_NAME_value(dnames, k);
+ if (!GENERAL_NAME_cmp(igen, cgen))
+ return 1;
+ }
+ }
+ }
+ return 0;
+ }
+
+/* Retrieve CRL corresponding to current certificate. Currently only
+ * one CRL is retrieved. Multiple CRLs may be needed if we handle
+ * CRLs partitioned on reason code later.
*/
+
static int get_crl(X509_STORE_CTX *ctx, X509_CRL **pcrl, X509 *x)
{
int ok;
X509_CRL *crl = NULL;
- X509_OBJECT xobj;
+ STACK_OF(X509_CRL) *skcrl;
X509_NAME *nm;
nm = X509_get_issuer_name(x);
ok = get_crl_sk(ctx, &crl, nm, ctx->crls);
return 1;
}
- ok = X509_STORE_get_by_subject(ctx, X509_LU_CRL, nm, &xobj);
+ /* Lookup CRLs from store */
- if (!ok)
+ skcrl = ctx->lookup_crls(ctx, nm);
+
+ /* If no CRLs found and a near match from get_crl_sk use that */
+ if (!skcrl)
{
- /* If we got a near match from get_crl_sk use that */
if (crl)
{
*pcrl = crl;
return 0;
}
- *pcrl = xobj.data.crl;
+ get_crl_sk(ctx, &crl, NULL, skcrl);
+
+ sk_X509_CRL_pop_free(skcrl, X509_CRL_free);
+
+ /* If we got any kind of CRL use it and return success */
if (crl)
- X509_CRL_free(crl);
- return 1;
+ {
+ *pcrl = crl;
+ return 1;
+ }
+
+ return 0;
}
/* Check CRL validity */
if(!ok) goto err;
}
+ if (crl->idp_flags & IDP_PRESENT)
+ {
+ if (crl->idp_flags & IDP_INVALID)
+ {
+ ctx->error = X509_V_ERR_INVALID_EXTENSION;
+ ok = ctx->verify_cb(0, ctx);
+ if(!ok) goto err;
+ }
+ if (crl->idp_flags & (IDP_REASONS|IDP_INDIRECT))
+ {
+ ctx->error = X509_V_ERR_UNSUPPORTED_EXTENSION_FEATURE;
+ ok = ctx->verify_cb(0, ctx);
+ if(!ok) goto err;
+ }
+ if (!idp_check_scope(ctx->current_cert, crl))
+ {
+ ctx->error = X509_V_ERR_DIFFERENT_CRL_SCOPE;
+ ok = ctx->verify_cb(0, ctx);
+ if(!ok) goto err;
+ }
+ }
+
/* Attempt to get issuer certificate public key */
ikey = X509_get_pubkey(issuer);
}
}
- if (!check_crl_time(ctx, crl, 1))
+ ok = check_crl_time(ctx, crl, 1);
+ if (!ok)
goto err;
ok = 1;
ext = sk_X509_EXTENSION_value(exts, idx);
if (ext->critical > 0)
{
+ /* We handle IDP now so permit it */
+ if (OBJ_obj2nid(ext->object) ==
+ NID_issuing_distribution_point)
+ continue;
ctx->error =
X509_V_ERR_UNHANDLED_CRITICAL_CRL_EXTENSION;
ok = ctx->verify_cb(0, ctx);
ctx->param->policies, ctx->param->flags);
if (ret == 0)
{
- X509err(X509_F_X509_VERIFY_CERT,ERR_R_MALLOC_FAILURE);
+ X509err(X509_F_CHECK_POLICY,ERR_R_MALLOC_FAILURE);
return 0;
}
/* Invalid or inconsistent extensions */
xs->valid = 1;
- if (!check_cert_time(ctx, xs))
+ ok = check_cert_time(ctx, xs);
+ if (!ok)
goto end;
/* The last error (if any) is still in the error value */
offset=0;
else
{
- if ((*str != '+') && (str[5] != '-'))
+ if ((*str != '+') && (*str != '-'))
return 0;
offset=((str[1]-'0')*10+(str[2]-'0'))*60;
offset+=(str[3]-'0')*10+(str[4]-'0');
else
ctx->cert_crl = cert_crl;
+ if (store && store->lookup_certs)
+ ctx->lookup_certs = store->lookup_certs;
+ else
+ ctx->lookup_certs = X509_STORE_get1_certs;
+
+ if (store && store->lookup_crls)
+ ctx->lookup_crls = store->lookup_crls;
+ else
+ ctx->lookup_crls = X509_STORE_get1_crls;
+
ctx->check_policy = check_policy;
projects / openssl.git / blobdiff