MIT Kerberos Documentation

krb5_get_init_creds_opt_set_salt - Set salt for optimistic preauthentication in initial credential options.

void krb5_get_init_creds_opt_set_salt(krb5_get_init_creds_opt * opt, krb5_data * salt)

[in] opt - Options structure

[in] salt - Salt data

When getting initial credentials with a password, a salt string it used to convert the password to a key. Normally this salt is obtained from the first KDC reply, but when performing optimistic preauthentication, the client may need to supply the salt string with this function.