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A.14. KRB_SAFE verification Connected: An Internet Encyclopedia
A.14. KRB_SAFE verification

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Prev: A.13. KRB_SAFE generation
Next: A.15. KRB_SAFE and KRB_PRIV common checks

A.14. KRB_SAFE verification

A.14. KRB_SAFE verification

        receive packet;
        if (packet.pvno != 5) then
                either process using other protocol spec
                or error_out(KRB_AP_ERR_BADVERSION);
        endif
        if (packet.msg-type != KRB_SAFE) then
                error_out(KRB_AP_ERR_MSG_TYPE);
        endif
        if (packet.checksum.cksumtype is not both collision-proof
                                             and keyed) then
                error_out(KRB_AP_ERR_INAPP_CKSUM);
        endif
        if (safe_priv_common_checks_ok(packet)) then
                set computed_checksum := checksum(packet.body);
                if (computed_checksum != packet.checksum) then
                        error_out(KRB_AP_ERR_MODIFIED);
                endif
                return (packet, PACKET_IS_GENUINE);
        else
                return common_checks_error;
        endif


Next: A.15. KRB_SAFE and KRB_PRIV common checks

Connected: An Internet Encyclopedia
A.14. KRB_SAFE verification

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