KG_USAGE_SIGN
krb5_keyusage sign_usage = KG_USAGE_SIGN;
krb5_keyusage sign_usage = KG_USAGE_SIGN;
krb5_keyusage sign_usage = KG_USAGE_SIGN;
if (!kg_verify_checksum_v1(context, signalg, ctx->seq, KG_USAGE_SIGN,
usage = (signalg == SGN_ALG_HMAC_MD5) ? 15 : KG_USAGE_SIGN;
kc->kc_checksumkey = krb5_get_checksum_key(key, KG_USAGE_SIGN);