KU_DIGITAL_SIGNATURE
if (ku_reject(issuer, KU_DIGITAL_SIGNATURE))
if (ku_reject(x, KU_DIGITAL_SIGNATURE | KU_KEY_AGREEMENT))
KU_DIGITAL_SIGNATURE | KU_KEY_ENCIPHERMENT | KU_KEY_AGREEMENT
return ku_reject(x, KU_DIGITAL_SIGNATURE | KU_NON_REPUDIATION) ? 0 : ret;
&& ((x->ex_kusage & ~(KU_NON_REPUDIATION | KU_DIGITAL_SIGNATURE)) || !(x->ex_kusage & (KU_NON_REPUDIATION | KU_DIGITAL_SIGNATURE))))
if ((x->ex_kusage & KU_DIGITAL_SIGNATURE) == 0)