X509_V_ERR_KEYUSAGE_NO_CRL_SIGN
case X509_V_ERR_KEYUSAGE_NO_CRL_SIGN:
if ((issuer->ex_flags & EXFLAG_KUSAGE) != 0 && (issuer->ex_kusage & KU_CRL_SIGN) == 0 && !verify_cb_crl(ctx, X509_V_ERR_KEYUSAGE_NO_CRL_SIGN))