MIT Kerberos Documentation

krb5_tkt_creds_step - Get the next KDC request in a TGS exchange.

krb5_error_code krb5_tkt_creds_step(krb5_context context, krb5_tkt_creds_context ctx, krb5_data * in, krb5_data * out, krb5_data * realm, unsigned int * flags)

[in] context - Library context

[in] ctx - TGS request context

[in] in - KDC response (empty on the first call)

[out] out - Next KDC request

[out] realm - Realm for next KDC request

[out] flags - Output flags

  • 0 Success; otherwise - Kerberos error codes

This function constructs the next KDC request for a TGS exchange, allowing the caller to control the transport of KDC requests and replies. On the first call, in should be set to an empty buffer; on subsequent calls, it should be set to the KDC’s reply to the previous request.

If more requests are needed, flags will be set to #KRB5_TKT_CREDS_STEP_FLAG_CONTINUE and the next request will be placed in out . If no more requests are needed, flags will not contain #KRB5_TKT_CREDS_STEP_FLAG_CONTINUE and out will be empty.

If this function returns KRB5KRB_ERR_RESPONSE_TOO_BIG , the caller should transmit the next request using TCP rather than UDP. If this function returns any other error, the TGS exchange has failed.


New in 1.9