+/* 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;
+ 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;
+
+ /* 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;
+
+ }
+