krb5int_derive_random
ret = krb5int_derive_random(enc, hash, inkey, &rnd,
r = krb5int_derive_random (enc, in, out, usage, DERIVE_RFC3961);
ret = krb5int_derive_random(ctp->enc, ctp->hash, key, &kc, &label_data,
krb5_error_code krb5int_derive_random(const struct krb5_enc_provider *enc,
ret = krb5int_derive_random(enc, hash, inkey, &rawkey, in_constant, alg);
ret = krb5int_derive_random(NULL, ktp->hash, key, &ki, &label_data,