����JFIFXX�����    $.' ",#(7),01444'9=82<.342  2!!22222222222222222222222222222222222222222222222222����"��4�� ���,�PG"Z_�4�˷����kjز�Z�,F+��_z�,�© �����zh6�٨�ic�fu���#ډb���_�N�?��wQ���5-�~�I���8����TK<5o�Iv-�����k�_U_�����~b�M��d����Ӝ�U�Hh��?]��E�w��Q���k�{��_}qFW7HTՑ��Y��F�?_�'ϔ��_�Ջt��=||I ��6�έ"�����D���/[�k�9���Y�8ds|\���Ҿp6�Ҵ���]��.����6�z<�v��@]�i%��$j��~�g��J>��no����pM[me�i$[����s�o�ᘨ�˸ nɜG-�ĨU�ycP�3.DB�li�;��hj���x7Z^�N�h������N3u{�:j�x�힞��#M&��jL P@_���� P��&��o8������9�����@Sz6�t7#O�ߋ �s}Yf�T���lmr����Z)'N��k�۞p����w\�Tȯ?�8`�O��i{wﭹW�[�r�� ��Q4F�׊���3m&L�=��h3����z~��#�\�l :�F,j@�� ʱ�wQT����8�"kJO���6�֚l����}���R�>ډK���]��y����&����p�}b��;N�1�m�r$�|��7�>e�@B�TM*-iH��g�D�)� E�m�|�ؘbҗ�a��Ҿ����t4���o���G��*oCN�rP���Q��@z,|?W[0�����:�n,jWiE��W��$~/�hp\��?��{(�0���+�Y8rΟ�+����>S-S����VN;�}�s?.����� w�9��˟<���Mq4�Wv'��{)0�1mB��V����W[�����8�/<� �%���wT^�5���b��)iM� pg�N�&ݝ��VO~�q���u���9� ����!��J27����$O-���! �:�%H��� ـ����y�ΠM=t{!S�� oK8������t<����è:a������[�����ա�H���~��w��Qz`�po�^ ����Q��n� �,uu�C�$ ^���,������8�#��:�6��e�|~���!�3�3.�\0��q��o�4`.|� ����y�Q�`~;�d�ׯ,��O�Zw�������`73�v�܋�<���Ȏ�� ـ4k��5�K�a�u�=9Yd��$>x�A�&�� j0� ���vF��� Y�|�y��� ~�6�@c��1vOp�Ig����4��l�OD���L����� R���c���j�_�uX6��3?nk��Wy�f;^*B� ��@�~a�`��Eu������+���6�L��.ü>��}y���}_�O�6�͐�:�YrG�X��kG�����l^w���~㒶sy��Iu�!� W ��X��N�7BV��O��!X�2����wvG�R�f�T#�����t�/?���%8�^�W�aT��G�cL�M���I��(J����1~�8�?aT ���]����AS�E��(��*E}� 2��#I/�׍qz��^t�̔���b�Yz4x���t�){ OH��+(E��A&�N�������XT��o��"�XC��'���)}�J�z�p� ��~5�}�^����+�6����w��c��Q�|Lp�d�H��}�(�.|����k��c4^�"�����Z?ȕ ��a<�L�!039C� �Eu�C�F�Ew�ç ;�n?�*o���B�8�bʝ���'#Rqf���M}7����]����s2tcS{�\icTx;�\��7K���P���ʇ Z O-��~��c>"��?�������P��E��O�8��@�8��G��Q�g�a�Վ���󁶠�䧘��_%#r�>�1�z�a��eb��qcPѵ��n���#L��� =��׀t� L�7�`��V���A{�C:�g���e@�w1 Xp3�c3�ġ����p��M"'-�@n4���fG��B3�DJ�8[Jo�ߐ���gK)ƛ��$���� ���8�3�����+���� �����6�ʻ���� ���S�kI�*KZlT _`���?��K����QK�d����B`�s}�>���`��*�>��,*@J�d�oF*����弝��O}�k��s��]��y�ߘ��c1G�V���<=�7��7����6�q�PT��tXԀ�!9*4�4Tހ3XΛex�46���Y��D ����� �BdemDa����\�_l,��G�/���֌7���Y�](�xTt^%�GE�����4�}bT���ڹ�����;Y)���B�Q��u��>J/J �⮶.�XԄ��j�ݳ�+E��d ��r�5�_D�1 ��o�� �B�x�΢�#���<��W�����8���R6�@g�M�.��� dr�D��>(otU��@x=��~v���2� ӣ�d�oBd��3�eO�6�㣷�����ݜ6��6Y��Qz`��S��{���\P�~z m5{J/L��1������<�e�ͅPu�b�]�ϔ���'������f�b� Zpw��c`"��i���BD@:)ִ�:�]��hv�E�w���T�l��P���"Ju�}��وV J��G6��. J/�Qgl߭�e�����@�z�Zev2u�)]կ�����7x���s�M�-<ɯ�c��r�v�����@��$�ޮ}lk���a���'����>x��O\�ZFu>�����ck#��&:��`�$�ai�>2Δ����l���oF[h��lE�ܺ�Πk:)���`�� $[6�����9�����kOw�\|���8}������ބ:��񶐕��I�A1/�=�2[�,�!��.}gN#�u����b��� ~��݊��}34q����d�E��Lc��$��"�[q�U�硬g^��%B �z���r�pJ�ru%v\h1Y�ne`ǥ:g���pQM~�^�Xi� ��`S�:V29.�P���V�?B�k�� AEvw%�_�9C�Q����wKekPؠ�\�;Io d�{ ߞo�c1eP����\� `����E=���@K<�Y���eڼ�J���w����{av�F�'�M�@/J��+9p���|]�����Iw &`��8���&M�hg��[�{��Xj��%��Ӓ�$��(����ʹN���<>�I���RY���K2�NPlL�ɀ)��&e����B+ь����( � �JTx���_?EZ� }@ 6�U���뙢ط�z��dWI�n` D����噥�[��uV��"�G&Ú����2g�}&m��?ċ�"����Om#��������� ��{�ON��"S�X��Ne��ysQ���@Fn��Vg���dX�~nj�]J�<�K]:��FW��b�������62�=��5f����JKw��bf�X�55��~J �%^����:�-�QIE��P��v�nZum� z � ~ə ���� ���ة����;�f��\v���g�8�1��f24;�V���ǔ�)����9���1\��c��v�/'Ƞ�w�������$�4�R-��t���� e�6�/�ġ �̕Ecy�J���u�B���<�W�ַ~�w[B1L۲�-JS΂�{���΃������A��20�c#��@ 0!1@AP"#2Q`$3V�%45a6�FRUq��� ����^7ׅ,$n�������+��F�`��2X'��0vM��p�L=������5��8������u�p~���.�`r�����\���O��,ư�0oS ��_�M�����l���4�kv\JSd���x���SW�<��Ae�IX����������$I���w�:S���y���›R��9�Q[���,�5�;�@]�%���u�@ *ro�lbI �� ��+���%m:�͇ZV�����u�̉����θau<�fc�.����{�4Ա� �Q����*�Sm��8\ujqs]{kN���)qO�y�_*dJ�b�7���yQqI&9�ԌK!�M}�R�;������S�T���1���i[U�ɵz�]��U)V�S6���3$K{�ߊ<�(� E]Զ[ǼENg�����'�\?#)Dkf��J���o��v���'�%ƞ�&K�u�!��b�35LX�Ϸ��63$K�a�;�9>,R��W��3�3� d�JeTYE.Mϧ��-�o�j3+y��y^�c�������VO�9NV\nd�1 ��!͕_)a�v;����թ�M�lWR1��)El��P;��yوÏ�u 3�k�5Pr6<�⒲l�!˞*��u־�n�!�l:����UNW ��%��Chx8vL'��X�@��*��)���̮��ˍ��� ���D-M�+J�U�kvK����+�x8��cY������?�Ԡ��~3mo��|�u@[XeY�C�\Kp�x8�oC�C�&����N�~3-H���� ��MX�s�u<`���~"WL��$8ξ��3���a�)|:@�m�\���^�`�@ҷ)�5p+��6���p�%i)P M���ngc�����#0Aruz���RL+xSS?���ʮ}()#�t��mˇ!��0}}y����<�e� �-ή�Ԩ��X������ MF���ԙ~l L.3���}�V뽺�v�����멬��Nl�)�2����^�Iq��a��M��qG��T�����c3#������3U�Ǎ���}��לS�|qa��ڃ�+���-��2�f����/��bz��ڐ�� �ݼ[2�ç����k�X�2�* �Z�d���J�G����M*9W���s{��w���T��x��y,�in�O�v��]���n����P�$�JB@=4�OTI�n��e�22a\����q�d���%�$��(���:���: /*�K[PR�fr\nڙdN���F�n�$�4�[�� U�zƶ����� �mʋ���,�ao�u 3�z� �x��Kn����\[��VFmbE;�_U��&V�Gg�]L�۪&#n%�$ɯ�dG���D�TI=�%+AB�Ru#��b4�1�»x�cs�YzڙJG��f��Il��d�eF'T� iA��T���uC�$����Y��H?����[!G`}���ͪ� �纤Hv\������j�Ex�K���!���OiƸ�Yj�+u-<���'q����uN�*�r\��+�]���<�wOZ.fp�ێ��,-*)V?j-kÊ#�`�r��dV����(�ݽBk�����G�ƛk�QmUڗe��Z���f}|����8�8��a���i��3'J�����~G_�^���d�8w������ R�`(�~�.��u���l�s+g�bv���W���lGc}��u���afE~1�Ue������Z�0�8�=e�� f@/�jqEKQQ�J��oN��J���W5~M>$6�Lt�;$ʳ{���^��6�{����v6���ķܰg�V�cnn �~z�x�«�,2�u�?cE+Ș�H؎�%�Za�)���X>uW�Tz�Nyo����s���FQƤ��$��*�&�LLXL)�1�" L��eO��ɟ�9=���:t��Z���c��Ž���Y?�ӭV�wv�~,Y��r�ۗ�|�y��GaF�����C�����.�+� ���v1���fήJ�����]�S��T��B��n5sW}y�$��~z�'�c ��8 ��� ,! �p��VN�S��N�N�q��y8z˱�A��4��*��'������2n<�s���^ǧ˭P�Jޮɏ�U�G�L�J�*#��<�V��t7�8����TĜ>��i}K%,���)[��z�21z ?�N�i�n1?T�I�R#��m-�����������������1����lA�`��fT5+��ܐ�c�q՝��ʐ��,���3�f2U�եmab��#ŠdQ�y>\��)�SLY����w#��.���ʑ�f��� ,"+�w�~�N�'�c�O�3F�������N<���)j��&��,-� �љ���֊�_�zS���TǦ����w�>��?�������n��U仆�V���e�����0���$�C�d���rP �m�׈e�Xm�Vu� �L��.�bֹ��� �[Դaզ���*��\y�8�Է:�Ez\�0�Kq�C b��̘��cө���Q��=0Y��s�N��S.���3.���O�o:���#���v7�[#߫ ��5�܎�L���Er4���9n��COWlG�^��0k�%<���ZB���aB_���������'=��{i�v�l�$�uC���mƎҝ{�c㱼�y]���W�i ��ߧc��m�H� m�"�"�����;Y�ߝ�Z�Ǔ�����:S#��|}�y�,/k�Ld� TA�(�AI$+I3��;Y*���Z��}|��ӧO��d�v��..#:n��f>�>���ȶI�TX��� 8��y����"d�R�|�)0���=���n4��6ⲑ�+��r<�O�܂~zh�z����7ܓ�HH�Ga롏���nCo�>������a ���~]���R���̲c?�6(�q�;5%� |�uj�~z8R=X��I�V=�|{v�Gj\gc��q����z�؋%M�ߍ����1y��#��@f^���^�>N�����#x#۹��6�Y~�?�dfPO��{��P�4��V��u1E1J �*|���%���JN��`eWu�zk M6���q t[�� ��g�G���v��WIG��u_ft����5�j�"�Y�:T��ɐ���*�;� e5���4����q$C��2d�}���� _S�L#m�Yp��O�.�C�;��c����Hi#֩%+) �Ӎ��ƲV���SYź��g |���tj��3�8���r|���V��1#;.SQ�A[���S������#���`n�+���$��$I �P\[�@�s��(�ED�z���P��])8�G#��0B��[ى��X�II�q<��9�~[Z멜�Z�⊔IWU&A>�P~�#��dp<�?����7���c��'~���5 ��+$���lx@�M�dm��n<=e�dyX��?{�|Aef ,|n3�<~z�ƃ�uۧ�����P��Y,�ӥQ�*g�#먙R�\���;T��i,��[9Qi歉����c>]9�� ��"�c��P�� �Md?٥��If�ت�u��k��/����F��9�c*9��Ǎ:�ØF���z�n*�@|I�ށ9����N3{'��[�'ͬ�Ҳ4��#}��!�V� Fu��,�,mTIk���v C�7v���B�6k�T9��1�*l� '~��ƞF��lU��'�M ����][ΩũJ_�{�i�I�n��$���L�� j��O�dx�����kza۪��#�E��Cl����x˘�o�����V���ɞ�ljr��)�/,�߬h�L��#��^��L�ф�,íMƁe�̩�NB�L�����iL����q�}��(��q��6IçJ$�W�E$��:������=#����(�K�B����zђ <��K(�N�۫K�w��^O{!����)�H���>x�������lx�?>Պ�+�>�W���,Ly!_�D���Ō�l���Q�!�[ �S����J��1��Ɛ�Y}��b,+�Lo�x�ɓ)����=�y�oh�@�꥟/��I��ѭ=��P�y9��� �ۍYӘ�e+�p�Jnϱ?V\SO%�(�t� ���=?MR�[Ș�����d�/ ��n�l��B�7j� ��!�;ӥ�/�[-���A�>�dN�sLj ��,ɪv��=1c�.SQ�O3�U���ƀ�ܽ�E����������̻��9G�ϷD�7(�}��Ävӌ\�y�_0[w ���<΍>����a_��[0+�L��F.�޺��f�>oN�T����q;���y\��bՃ��y�jH�<|q-eɏ�_?_9+P���Hp$�����[ux�K w�Mw��N�ی'$Y2�=��q���KB��P��~������Yul:�[<����F1�2�O���5=d����]Y�sw:���Ϯ���E��j,_Q��X��z`H1,#II ��d�wr��P˂@�ZJV����y$�\y�{}��^~���[:N����ߌ�U�������O��d�����ؾe��${p>G��3c���Ė�lʌ�� ת��[��`ϱ�-W����dg�I��ig2��� ��}s ��ؤ(%#sS@���~���3�X�nRG�~\jc3�v��ӍL��M[JB�T��s3}��j�Nʖ��W����;7��ç?=X�F=-�=����q�ߚ���#���='�c��7���ڑW�I(O+=:uxq�������������e2�zi+�kuG�R��������0�&e�n���iT^J����~\jy���p'dtG��s����O��3����9* �b#Ɋ�� p������[Bws�T�>d4�ۧs���nv�n���U���_�~,�v����ƜJ1��s�� �QIz��)�(lv8M���U=�;����56��G���s#�K���MP�=��LvyGd��}�VwWBF�'�à �?MH�U�g2�� ����!�p�7Q��j��ڴ����=��j�u��� Jn�A s���uM������e��Ɔ�Ҕ�!)'��8Ϣ�ٔ��ޝ(��Vp���צ֖d=�IC�J�Ǡ{q������kԭ�߸���i��@K����u�|�p=..�*+����x�����z[Aqġ#s2a�Ɗ���RR�)*HRsi�~�a &f��M��P����-K�L@��Z��Xy�'x�{}��Zm+���:�)�) IJ�-i�u���� ���ܒH��'�L(7�y�GӜq���� j��� 6ߌg1�g�o���,kر���tY�?W,���p���e���f�OQS��!K�۟cҒA�|ս�j�>��=⬒��˧L[�� �߿2JaB~R��u�:��Q�] �0H~���]�7��Ƽ�I���(}��cq '�ήET���q�?f�ab���ӥvr� �)o��-Q��_'����ᴎo��K������;��V���o��%���~OK ����*��b�f:���-ťIR��`B�5!RB@���ï�� �u �̯e\�_U�_������� g�ES��3�������QT��a����x����U<~�c?�*�#]�MW,[8O�a�x��]�1bC|踤�P��lw5V%�)�{t�<��d��5���0i�XSU��m:��Z�┵�i�"��1�^B�-��P�hJ��&)O��*�D��c�W��vM��)����}���P��ܗ-q����\mmζZ-l@�}��a��E�6��F�@��&Sg@���ݚ�M����� ȹ 4����#p�\H����dYDo�H���"��\��..R�B�H�z_�/5˘����6��KhJR��P�mƶi�m���3�,#c�co��q�a)*Pt����R�m�k�7x�D�E�\Y�閣_X�<���~�)���c[[�BP����6�Yq���S��0����%_����;��Àv�~�| VS؇ ��'O0��F0��\���U�-�d@�����7�SJ*z��3n��y��P����O���������m�~�P�3|Y��ʉr#�C�<�G~�.,! ���bqx���h~0=��!ǫ�jy����l�O,�[B��~��|9��ٱ����Xly�#�i�B��g%�S��������tˋ���e���ې��\[d�t)��.+u�|1 ������#�~Oj����hS�%��i.�~X���I�H�m��0n���c�1uE�q��cF�RF�o���7� �O�ꮧ� ���ۛ{��ʛi5�rw?׌#Qn�TW��~?y$��m\�\o����%W� ?=>S�N@�� �Ʈ���R����N�)�r"C�:��:����� �����#��qb��Y�. �6[��2K����2u�Ǧ�HYR��Q�MV��� �G�$��Q+.>�����nNH��q�^��� ����q��mM��V��D�+�-�#*�U�̒ ���p욳��u:�������IB���m���PV@O���r[b= �� ��1U�E��_Nm�yKbN�O���U�}�the�`�|6֮P>�\2�P�V���I�D�i�P�O;�9�r�mAHG�W�S]��J*�_�G��+kP�2����Ka�Z���H�'K�x�W�MZ%�O�YD�Rc+o��?�q��Ghm��d�S�oh�\�D�|:W������UA�Qc yT�q������~^�H��/��#p�CZ���T�I�1�ӏT����4��"�ČZ�����}��`w�#�*,ʹ�� ��0�i��課�Om�*�da��^gJ݅{���l�e9uF#T�ֲ��̲�ٞC"�q���ߍ ոޑ�o#�XZTp����@ o�8��(jd��xw�]�,f���`~�|,s��^����f�1���t��|��m�򸄭/ctr��5s��7�9Q�4�H1꠲BB@l9@���C�����+�wp�xu�£Yc�9��?`@#�o�mH�s2��)�=��2�.�l����jg�9$�Y�S�%*L������R�Y������7Z���,*=�䷘$�������arm�o�ϰ���UW.|�r�uf����IGw�t����Zwo��~5 ��YյhO+=8fF�)�W�7�L9lM�̘·Y���֘YLf�큹�pRF���99.A �"wz��=E\Z���'a� 2��Ǚ�#;�'}�G���*��l��^"q��+2FQ� hj��kŦ��${���ޮ-�T�٭cf�|�3#~�RJ����t��$b�(R��(����r���dx� >U b�&9,>���%E\� Ά�e�$��'�q't��*�א���ެ�b��-|d���SB�O�O��$�R+�H�)�܎�K��1m`;�J�2�Y~9��O�g8=vqD`K[�F)k�[���1m޼c��n���]s�k�z$@��)!I �x՝"v��9=�ZA=`Ɠi �:�E��)`7��vI��}d�YI�_ �o�:ob���o ���3Q��&D&�2=�� �Ά��;>�h����y.*ⅥS������Ӭ�+q&����j|UƧ����}���J0��WW< ۋS�)jQR�j���Ư��rN)�Gű�4Ѷ(�S)Ǣ�8��i��W52���No˓� ۍ%�5brOn�L�;�n��\G����=�^U�dI���8$�&���h��'���+�(������cȁ߫k�l��S^���cƗjԌE�ꭔ��gF���Ȓ��@���}O���*;e�v�WV���YJ\�]X'5��ղ�k�F��b 6R�o՜m��i N�i����>J����?��lPm�U��}>_Z&�KK��q�r��I�D�Չ~�q�3fL�:S�e>���E���-G���{L�6p�e,8��������QI��h��a�Xa��U�A'���ʂ���s�+טIjP�-��y�8ۈZ?J$��W�P� ��R�s�]��|�l(�ԓ��sƊi��o(��S0��Y� 8�T97.�����WiL��c�~�dxc�E|�2!�X�K�Ƙਫ਼�$((�6�~|d9u+�qd�^3�89��Y�6L�.I�����?���iI�q���9�)O/뚅����O���X��X�V��ZF[�یgQ�L��K1���RҖr@v�#��X�l��F���Нy�S�8�7�kF!A��sM���^rkp�jP�DyS$N���q��nxҍ!U�f�!eh�i�2�m���`�Y�I�9r�6� �TF���C}/�y�^���Η���5d�'��9A-��J��>{�_l+�`��A���[�'��յ�ϛ#w:݅�%��X�}�&�PSt�Q�"�-��\縵�/����$Ɨh�Xb�*�y��BS����;W�ջ_mc�����vt?2}1�;qS�d�d~u:2k5�2�R�~�z+|HE!)�Ǟl��7`��0�<�,�2*���Hl-��x�^����'_TV�gZA�'j� ^�2Ϊ��N7t�����?w�� �x1��f��Iz�C-Ȗ��K�^q�;���-W�DvT�7��8�Z�������� hK�(P:��Q- �8�n�Z���܃e貾�<�1�YT<�,�����"�6{/ �?�͟��|1�:�#g��W�>$����d��J��d�B��=��jf[��%rE^��il:��B���x���Sּ�1հ��,�=��*�7 fcG��#q� �eh?��2�7�����,�!7x��6�n�LC�4x��},Geǝ�tC.��vS �F�43��zz\��;QYC,6����~;RYS/6���|2���5���v��T��i����������mlv��������&� �nRh^ejR�LG�f���? �ۉҬܦƩ��|��Ȱ����>3����!v��i�ʯ�>�v��オ�X3e���_1z�Kȗ\<������!�8���V��]��?b�k41�Re��T�q��mz��TiOʦ�Z��Xq���L������q"+���2ۨ��8}�&N7XU7Ap�d�X��~�׿��&4e�o�F��� �H����O���č�c�� 懴�6���͉��+)��v;j��ݷ�� �UV�� i��� j���Y9GdÒJ1��詞�����V?h��l����l�cGs�ځ�������y�Ac�����\V3�? �� ܙg�>qH�S,�E�W�[�㺨�uch�⍸�O�}���a��>�q�6�n6����N6�q������N ! 1AQaq�0@����"2BRb�#Pr���3C`��Scst���$4D���%Td�� ?���N����a��3��m���C���w��������xA�m�q�m���m������$����4n淿t'��C"w��zU=D�\R+w�p+Y�T�&�պ@��ƃ��3ޯ?�Aﶂ��aŘ���@-�����Q�=���9D��ռ�ѻ@��M�V��P��܅�G5�f�Y<�u=,EC)�<�Fy'�"�&�չ�X~f��l�KԆV��?�� �W�N����=(� �;���{�r����ٌ�Y���h{�١������jW����P���Tc�����X�K�r��}���w�R��%��?���E��m�� �Y�q|����\lEE4���r���}�lsI�Y������f�$�=�d�yO����p�����yBj8jU�o�/�S��?�U��*������ˍ�0������u�q�m [�?f����a�� )Q�>����6#������� ?����0UQ����,IX���(6ڵ[�DI�MNލ�c&���υ�j\��X�R|,4��� j������T�hA�e��^���d���b<����n�� �즇�=!���3�^�`j�h�ȓr��jẕ�c�,ٞX����-����a�ﶔ���#�$��]w�O��Ӫ�1y%��L�Y<�wg#�ǝ�̗`�x�xa�t�w��»1���o7o5��>�m뭛C���Uƃߜ}�C���y1Xνm�F8�jI���]����H���ۺиE@I�i;r�8ӭ����V�F�Շ| ��&?�3|x�B�MuS�Ge�=Ӕ�#BE5G�����Y!z��_e��q�р/W>|-�Ci߇�t�1ޯќd�R3�u��g�=0 5��[?�#͏��q�cf���H��{ ?u�=?�?ǯ���}Z��z���hmΔ�BFTW�����<�q�(v� ��!��z���iW]*�J�V�z��gX֧A�q�&��/w���u�gYӘa���; �i=����g:��?2�dž6�ى�k�4�>�Pxs����}������G�9��3 ���)gG�R<>r h�$��'nc�h�P��Bj��J�ҧH� -��N1���N��?��~��}-q!=��_2hc�M��l�vY%UE�@|�v����M2�.Y[|y�"Eï��K�ZF,�ɯ?,q�?v�M 80jx�"�;�9vk�����+ ֧�� �ȺU��?�%�vcV��mA�6��Qg^M����A}�3�nl� QRN�l8�kkn�'�����(��M�7m9و�q���%ޟ���*h$Zk"��$�9��: �?U8�Sl��,,|ɒ��xH(ѷ����Gn�/Q�4�P��G�%��Ա8�N��!� �&�7�;���eKM7�4��9R/%����l�c>�x;������>��C�:�����t��h?aKX�bhe�ᜋ^�$�Iհ �hr7%F$�E��Fd���t��5���+�(M6�t����Ü�UU|zW�=a�Ts�Tg������dqP�Q����b'�m���1{|Y����X�N��b �P~��F^F:����k6�"�j!�� �I�r�`��1&�-$�Bevk:y���#yw��I0��x��=D�4��tU���P�ZH��ڠ底taP��6����b>�xa����Q�#� WeF��ŮNj�p�J* mQ�N����*I�-*�ȩ�F�g�3 �5��V�ʊ�ɮ�a��5F���O@{���NX��?����H�]3��1�Ri_u��������ѕ�� ����0��� F��~��:60�p�͈�S��qX#a�5>���`�o&+�<2�D����: �������ڝ�$�nP���*)�N�|y�Ej�F�5ټ�e���ihy�Z �>���k�bH�a�v��h�-#���!�Po=@k̆IEN��@��}Ll?j�O������߭�ʞ���Q|A07x���wt!xf���I2?Z��<ץ�T���cU�j��]��陎Ltl �}5�ϓ��$�,��O�mˊ�;�@O��jE��j(�ا,��LX���LO���Ц�90�O �.����a��nA���7������j4 ��W��_ٓ���zW�jcB������y՗+EM�)d���N�g6�y1_x��p�$Lv:��9�"z��p���ʙ$��^��JԼ*�ϭ����o���=x�Lj�6�J��u82�A�H�3$�ٕ@�=Vv�]�'�qEz�;I˼��)��=��ɯ���x �/�W(V���p�����$ �m�������u�����񶤑Oqˎ�T����r��㠚x�sr�GC��byp�G��1ߠ�w e�8�$⿄����/�M{*}��W�]˷.�CK\�ުx���/$�WPw���r� |i���&�}�{�X� �>��$-��l���?-z���g����lΆ���(F���h�vS*���b���߲ڡn,|)mrH[���a�3�ר�[1��3o_�U�3�TC�$��(�=�)0�kgP���� ��u�^=��4 �WYCҸ:��vQ�ר�X�à��tk�m,�t*��^�,�}D*� �"(�I��9R����>`�`��[~Q]�#af��i6l��8���6�:,s�s�N6�j"�A4���IuQ��6E,�GnH��zS�HO�uk�5$�I�4��ؤ�Q9�@��C����wp�BGv[]�u�Ov���0I4���\��y�����Q�Ѹ��~>Z��8�T��a��q�ޣ;z��a���/��S��I:�ܫ_�|������>=Z����8:�S��U�I�J��"IY���8%b8���H��:�QO�6�;7�I�S��J��ҌAά3��>c���E+&jf$eC+�z�;��V����� �r���ʺ������my�e���aQ�f&��6�ND��.:��NT�vm�<- u���ǝ\MvZY�N�NT��-A�>jr!S��n�O 1�3�Ns�%�3D@���`������ܟ 1�^c<���� �a�ɽ�̲�Xë#�w�|y�cW�=�9I*H8�p�^(4���՗�k��arOcW�tO�\�ƍR��8����'�K���I�Q�����?5�>[�}��yU�ײ -h��=��% q�ThG�2�)���"ו3]�!kB��*p�FDl�A���,�eEi�H�f�Ps�����5�H:�Փ~�H�0Dت�D�I����h�F3�������c��2���E��9�H��5�zԑ�ʚ�i�X�=:m�xg�hd(�v����׊�9iS��O��d@0ڽ���:�p�5�h-��t�&���X�q�ӕ,��ie�|���7A�2���O%P��E��htj��Y1��w�Ѓ!����  ���� ࢽ��My�7�\�a�@�ţ�J �4�Ȼ�F�@o�̒?4�wx��)��]�P��~�����u�����5�����7X ��9��^ܩ�U;Iꭆ 5 �������eK2�7(�{|��Y׎ �V��\"���Z�1� Z�����}��(�Ǝ"�1S���_�vE30>���p;� ΝD��%x�W�?W?v����o�^V�i�d��r[��/&>�~`�9Wh��y�;���R��� ;;ɮT��?����r$�g1�K����A��C��c��K��l:�'��3 c�ﳯ*"t8�~l��)���m��+U,z��`(�>yJ�?����h>��]��v��ЍG*�{`��;y]��I�T� ;c��NU�fo¾h���/$���|NS���1�S�"�H��V���T���4��uhǜ�]�v;���5�͠x��'C\�SBpl���h}�N����� A�Bx���%��ޭ�l��/����T��w�ʽ]D�=����K���ž�r㻠l4�S�O?=�k �M:� ��c�C�a�#ha���)�ѐxc�s���gP�iG��{+���x���Q���I= �� z��ԫ+ �8"�k�ñ�j=|����c ��y��CF��/��*9ж�h{ �?4�o� ��k�m�Q�N�x��;�Y��4膚�a�w?�6�>e]�����Q�r�:����g�,i"�����ԩA�*M�<�G��b�if��l^M��5� �Ҩ�{����6J��ZJ�����P�*�����Y���ݛu�_4�9�I8�7���������,^ToR���m4�H��?�N�S�ѕw��/S��甍�@�9H�S�T��t�ƻ���ʒU��*{Xs�@����f�����֒Li�K{H�w^���������Ϥm�tq���s� ���ք��f:��o~s��g�r��ט� �S�ѱC�e]�x���a��) ���(b-$(�j>�7q�B?ӕ�F��hV25r[7 Y� }L�R��}����*sg+��x�r�2�U=�*'WS��ZDW]�WǞ�<��叓���{�$�9Ou4��y�90-�1�'*D`�c�^o?(�9��u���ݐ��'PI&� f�Jݮ�������:wS����jfP1F:X �H�9dԯ���˝[�_54 �}*;@�ܨ�� ð�yn�T���?�ןd�#���4rG�ͨ��H�1�|-#���Mr�S3��G�3�����)�.᧏3v�z֑��r����$G"�`j �1t��x0<Ɔ�Wh6�y�6��,œ�Ga��gA����y��b��)��h�D��ß�_�m��ü �gG;��e�v��ݝ�nQ� ��C����-�*��o���y�a��M��I�>�<���]obD��"�:���G�A��-\%LT�8���c�)��+y76���o�Q�#*{�(F�⽕�y����=���rW�\p���۩�c���A���^e6��K������ʐ�cVf5$�'->���ՉN"���F�"�UQ@�f��Gb~��#�&�M=��8�ט�JNu9��D��[̤�s�o�~������ G��9T�tW^g5y$b��Y'��س�Ǵ�=��U-2 #�MC�t(�i� �lj�@Q 5�̣i�*�O����s�x�K�f��}\��M{E�V�{�υ��Ƈ�����);�H����I��fe�Lȣr�2��>��W�I�Ȃ6������i��k�� �5�YOxȺ����>��Y�f5'��|��H+��98pj�n�.O�y�������jY��~��i�w'������l�;�s�2��Y��:'lg�ꥴ)o#'Sa�a�K��Z� �m��}�`169�n���"���x��I ��*+� }F<��cГ���F�P�������ֹ*�PqX�x۩��,� ��N�� �4<-����%����:��7����W���u�`����� $�?�I��&����o��o��`v�>��P��"��l���4��5'�Z�gE���8���?��[�X�7(��.Q�-��*���ތL@̲����v��.5���[��=�t\+�CNܛ��,g�SQnH����}*F�G16���&:�t��4ُ"A��̣��$�b �|����#rs��a�����T�� ]�<�j��BS�('$�ɻ� �wP;�/�n��?�ݜ��x�F��yUn�~mL*-�������Xf�wd^�a�}��f�,=t�׵i�.2/wpN�Ep8�OР���•��R�FJ� 55TZ��T �ɭ�<��]��/�0�r�@�f��V��V����Nz�G��^���7hZi����k��3�,kN�e|�vg�1{9]_i��X5y7� 8e]�U����'�-2,���e"����]ot�I��Y_��n�(JҼ��1�O ]bXc���Nu�No��pS���Q_���_�?i�~�x h5d'�(qw52] ��'ޤ�q��o1�R!���`ywy�A4u���h<קy���\[~�4�\ X�Wt/� 6�����n�F�a8��f���z �3$�t(���q��q�x��^�XWeN'p<-v�!�{�(>ӽDP7��ո0�y)�e$ٕv�Ih'Q�EA�m*�H��RI��=:��� ���4牢) �%_iN�ݧ�l]� �Nt���G��H�L��� ɱ�g<���1V�,�J~�ٹ�"K��Q�� 9�HS�9�?@��k����r�;we݁�]I�!{ �@�G�[�"��`���J:�n]�{�cA�E����V��ʆ���#��U9�6����j�#Y�m\��q�e4h�B�7��C�������d<�?J����1g:ٳ���=Y���D�p�ц� ׈ǔ��1�]26؜oS�'��9�V�FVu�P�h�9�xc�oq�X��p�o�5��Ա5$�9W�V(�[Ak�aY錎qf;�'�[�|���b�6�Ck��)��#a#a˙��8���=äh�4��2��C��4tm^ �n'c���]GQ$[Wҿ��i���vN�{Fu ��1�gx��1┷���N�m��{j-,��x�� Ūm�ЧS�[�s���Gna���䑴�� x�p 8<������97�Q���ϴ�v�aϚG��Rt�Һ׈�f^\r��WH�JU�7Z���y)�vg=����n��4�_)y��D'y�6�]�c�5̪�\� �PF�k����&�c;��cq�$~T�7j ���nç]�<�g ":�to�t}�159�<�/�8������m�b�K#g'I'.W�����6��I/��>v��\�MN��g���m�A�yQL�4u�Lj�j9��#44�t��l^�}L����n��R��!��t��±]��r��h6ٍ>�yҏ�N��fU�� ���� Fm@�8}�/u��jb9������he:A�y�ծw��GpΧh�5����l}�3p468��)U��d��c����;Us/�֔�YX�1�O2��uq�s��`hwg�r~�{ R��mhN��؎*q 42�*th��>�#���E����#��Hv�O����q�}�����6�e��\�,Wk�#���X��b>��p}�դ��3���T5��†��6��[��@�P�y*n��|'f�֧>�lư΂�̺����SU�'*�q�p�_S�����M�� '��c�6�����m�� ySʨ;M��r���Ƌ�m�Kxo,���Gm�P��A�G�:��i��w�9�}M(�^�V��$ǒ�ѽ�9���|���� �a����J�SQ�a���r�B;����}���ٻ֢�2�%U���c�#�g���N�a�ݕ�'�v�[�OY'��3L�3�;,p�]@�S��{ls��X�'���c�jw�k'a�.��}�}&�� �dP�*�bK=ɍ!����;3n�gΊU�ߴmt�'*{,=SzfD� A��ko~�G�aoq�_mi}#�m�������P�Xhύ����mxǍ�΂���巿zf��Q���c���|kc�����?���W��Y�$���_Lv����l߶��c���`?����l�j�ݲˏ!V��6����U�Ђ(A���4y)H���p�Z_�x��>���e��R��$�/�`^'3qˏ�-&Q�=?��CFVR �D�fV�9��{�8g�������n�h�(P"��6�[�D���< E�����~0<@�`�G�6����Hг�cc�� �c�K.5��D��d�B���`?�XQ��2��ٿyqo&+�1^� DW�0�ꊩ���G�#��Q�nL3��c���������/��x ��1�1[y�x�პCW��C�c�UĨ80�m�e�4.{�m��u���I=��f�����0QRls9���f���������9���~f�����Ǩ��a�"@�8���ȁ�Q����#c�ic������G��$���G���r/$W�(��W���V�"��m�7�[m�A�m����bo��D� j����۳� l���^�k�h׽����� ��#� iXn�v��eT�k�a�^Y�4�BN��ĕ��0 !01@Q"2AaPq3BR������?���@4�Q�����T3,���㺠�W�[=JK�Ϟ���2�r^7��vc�:�9 �E�ߴ�w�S#d���Ix��u��:��Hp��9E!�� V 2;73|F��9Y���*ʬ�F��D����u&���y؟��^EA��A��(ɩ���^��GV:ݜDy�`��Jr29ܾ�㝉��[���E;Fzx��YG��U�e�Y�C���� ����v-tx����I�sם�Ę�q��Eb�+P\ :>�i�C'�;�����k|z�رn�y]�#ǿb��Q��������w�����(�r|ӹs��[�D��2v-%��@;�8<a���[\o[ϧw��I!��*0�krs)�[�J9^��ʜ��p1)� "��/_>��o��<1����A�E�y^�C��`�x1'ܣn�p��s`l���fQ��):�l����b>�Me�jH^?�kl3(�z:���1ŠK&?Q�~�{�ٺ�h�y���/�[��V�|6��}�KbX����mn[-��7�5q�94�������dm���c^���h� X��5��<�eޘ>G���-�}�دB�ޟ� ��|�rt�M��V+�]�c?�-#ڛ��^ǂ}���Lkr���O��u�>�-D�ry� D?:ޞ�U��ǜ�7�V��?瓮�"�#���r��չģVR;�n���/_� ؉v�ݶe5d�b9��/O��009�G���5n�W����JpA�*�r9�>�1��.[t���s�F���nQ� V 77R�]�ɫ8����_0<՜�IF�u(v��4��F�k�3��E)��N:��yڮe��P�`�1}�$WS��J�SQ�N�j�ٺ��޵�#l���ј(�5=��5�lǏmoW�v-�1����v,W�mn��߀$x�<����v�j(����c]��@#��1������Ǔ���o'��u+����;G�#�޸��v-lη��/(`i⣍Pm^���ԯ̾9Z��F��������n��1��� ��]�[��)�'������:�֪�W��FC����� �B9،!?���]��V��A�Վ�M��b�w��G F>_DȬ0¤�#�QR�[V��kz���m�w�"��9ZG�7'[��=�Q����j8R?�zf�\a�=��O�U����*oB�A�|G���2�54 �p��.w7� �� ��&������ξxGHp� B%��$g�����t�Џ򤵍z���HN�u�Я�-�'4��0��;_��3 !01"@AQa2Pq#3BR������?��ʩca��en��^��8���<�u#��m*08r��y�N"�<�Ѳ0��@\�p��� �����Kv�D��J8�Fҽ� �f�Y��-m�ybX�NP����}�!*8t(�OqѢ��Q�wW�K��ZD��Δ^e��!� ��B�K��p~�����e*l}z#9ң�k���q#�Ft�o��S�R����-�w�!�S���Ӥß|M�l޶V��!eˈ�8Y���c�ЮM2��tk���� ������J�fS����Ö*i/2�����n]�k�\���|4yX�8��U�P.���Ы[���l��@"�t�<������5�lF���vU�����W��W��;�b�cД^6[#7@vU�xgZv��F�6��Q,K�v��� �+Ъ��n��Ǣ��Ft���8��0��c�@�!�Zq s�v�t�;#](B��-�nῃ~���3g������5�J�%���O������n�kB�ĺ�.r��+���#�N$?�q�/�s�6��p��a����a��J/��M�8��6�ܰ"�*������ɗud"\w���aT(����[��F��U՛����RT�b���n�*��6���O��SJ�.�ij<�v�MT��R\c��5l�sZB>F��<7�;EA��{��E���Ö��1U/�#��d1�a�n.1ě����0�ʾR�h��|�R��Ao�3�m3 ��%�� ���28Q� ��y��φ���H�To�7�lW>����#i`�q���c����a��� �m,B�-j����݋�'mR1Ήt�>��V��p���s�0IbI�C.���1R�ea�����]H�6����������4B>��o��](��$B���m�����a�!=��?�B� K�Ǿ+�Ծ"�n���K��*��+��[T#�{E�J�S����Q�����s�5�:�U�\wĐ�f�3����܆&�)����I���Ԇw��E T�lrTf6Q|R�h:��[K�� �z��c֧�G�C��%\��_�a�84��HcO�bi��ؖV��7H �)*ģK~Xhչ0��4?�0��� �E<���}3���#���u�?�� ��|g�S�6ꊤ�|�I#Hڛ� �ա��w�X��9��7���Ŀ%�SL��y6č��|�F�a 8���b��$�sק�h���b9RAu7�˨p�Č�_\*w��묦��F ����4D~�f����|(�"m���NK��i�S�>�$d7SlA��/�²����SL��|6N�}���S�˯���g��]6��; �#�.��<���q'Q�1|KQ$�����񛩶"�$r�b:���N8�w@��8$�� �AjfG|~�9F ���Y��ʺ��Bwؒ������M:I岎�G��`s�YV5����6��A �b:�W���G�q%l�����F��H���7�������Fsv7��k�� 403WebShell
403Webshell
Server IP : 51.161.54.47  /  Your IP : 216.73.216.114
Web Server : Apache/2.4.68 (Unix) OpenSSL/1.1.1k
System : Linux host.ditinformatica.ar 4.18.0-553.144.1.el8_10.x86_64 #1 SMP Tue Jul 14 09:26:58 EDT 2026 x86_64
User : kalaycom ( 1021)
PHP Version : 7.4.33
Disable Function : NONE
MySQL : OFF  |  cURL : ON  |  WGET : ON  |  Perl : ON  |  Python : OFF  |  Sudo : ON  |  Pkexec : ON
Directory :  /usr/share/nmap/nselib/

Upload File :
current_dir [ Writeable ] document_root [ Writeable ]

 

Command :


[ Back ]     

Current File : /usr/share/nmap/nselib/vnc.lua
---
-- The VNC library provides some basic functionality needed in order to
-- communicate with VNC servers, and derivatives such as Tight- or Ultra-
-- VNC.
--
-- Summary
-- -------
-- The library currently supports the VNC Authentication security type only.
-- This security type is supported by default in VNC, TightVNC and
-- "Remote Desktop Sharing" in eg. Ubuntu. For servers that do not support
-- this authentication security type the login method will fail.
--
-- Overview
-- --------
-- The library contains the following classes:
--
--   o VNC
--     - This class contains the core functions needed to communicate with VNC
--

-- @copyright Same as Nmap--See https://nmap.org/book/man-legal.html
-- @author Patrik Karlsson <patrik@cqure.net>

-- Version 0.1
-- Created 07/07/2010 - v0.1 - created by Patrik Karlsson <patrik@cqure.net>

local bits = require "bits"
local match = require "match"
local nmap = require "nmap"
local stdnse = require "stdnse"
local string = require "string"
local table = require "table"
local tableaux = require "tableaux"
_ENV = stdnse.module("vnc", stdnse.seeall)

local HAVE_SSL, openssl = pcall(require,'openssl')

VENCRYPT_SUBTYPES = {
  PLAIN = 256,
  TLSNONE = 257,
  TLSVNC = 258,
  TLSPLAIN = 259,
  X509NONE = 260,
  X509VNC = 261,
  X509PLAIN = 262,
  X509SASL = 263,
  TLSSASL = 264,
}
VENCRYPT_SUBTYPES_STR = {
  [256] = "Plain",
  [257] = "None, Anonymous TLS",
  [258] = "VNC auth, Anonymous TLS",
  [259] = "Plain, Anonymous TLS",
  [260] = "None, Server-authenticated TLS",
  [261] = "VNC auth, Server-authenticated TLS",
  [262] = "Plain, Server-authenticated TLS",
  [263] = "SASL, Server-authenticated TLS",
  [264] = "SASL, Anonymous TLS",
}

local function process_error(socket)
  local status, tmp = socket:receive_buf(match.numbytes(4), true)
  if( not(status) ) then
    return false, "VNC:handshake failed to retrieve error message"
  end
  local len = string.unpack(">I4", tmp)
  local status, err = socket:receive_buf(match.numbytes(len), true)
  if( not(status) ) then
    return false, "VNC:handshake failed to retrieve error message"
  end
  return false, err
end

local function first_of (list, lookup)
  for i=1, #list do
    if tableaux.contains(lookup, list[i]) then
      return list[i]
    end
  end
end

-- generalized output formatter for security types and subtypes
local function get_types_as_table (types, lookup)
  local tmp = {}
  local typemt = {
    __tostring = function(me)
      return ("%s (%s)"):format(me.name, me.type)
    end
  }
  for i=1, types.count do
    local t = {name = lookup[types.types[i]] or "Unknown security type", type=types.types[i]}
    setmetatable(t, typemt)
    table.insert( tmp, t )
  end
  return tmp
end

VNC = {

  versions = {
    ["RFB 003.003"] = "3.3",
    ["RFB 003.007"] = "3.7",
    ["RFB 003.008"] = "3.8",

    -- Mac Screen Sharing, could probably be used to fingerprint OS
    ["RFB 003.889"] = "3.889",
  },

  sectypes = {
    INVALID = 0,
    NONE = 1,
    VNCAUTH = 2,
    RA2 = 5,
    RA2NE = 6,
    TIGHT = 16,
    ULTRA = 17,
    TLS = 18,
    VENCRYPT = 19,
    GTK_VNC_SASL = 20,
    MD5 = 21,
    COLIN_DEAN_XVP = 22,
    MAC_OSX_SECTYPE_30 = 30,
    MAC_OSX_SECTYPE_35 = 35,
    MSLOGON = 0xfffffffa,
  },

  -- Security types are fetched from the rfbproto.pdf
  sectypes_str = {
    [0] = "Invalid security type",
    [1] = "None",
    [2] = "VNC Authentication",
    [5] = "RA2",
    [6] = "RA2ne",
    [16]= "Tight",
    [17]= "Ultra",
    [18]= "TLS",
    [19]= "VeNCrypt",
    [20]= "GTK-VNC SASL",
    [21]= "MD5 hash authentication",
    [22]= "Colin Dean xvp",
    -- Mac OS X screen sharing uses 30 and 35
    [30]= "Apple Remote Desktop",
    [35]= "Mac OS X security type",
    [0xfffffffa] = "UltraVNC MS Logon",
  },

  new = function(self, host, port, socket)
    local o = {
      host = host,
      port = port,
      socket = socket or nmap.new_socket(),
    }
    o.socket:set_timeout(5000)
    setmetatable(o, self)
    self.__index = self
    return o
  end,

  --- Connects the VNC socket
  connect = function(self)
    return self.socket:connect(self.host, self.port, "tcp")
  end,

  --- Disconnects the VNC socket
  disconnect = function(self)
    return self.socket:close()
  end,

  --- Performs the VNC handshake and determines
  -- * The RFB Protocol to use
  -- * The supported authentication security types
  --
  -- @return status, true on success, false on failure
  -- @return error string containing error message if status is false
  handshake = function(self)
    local status, data = self.socket:receive_buf(match.pattern_limit("[\r\n]+", 16), true)
    if not status or not string.match(data, "^RFB %d%d%d%.%d%d%d[\r\n]") then
      stdnse.debug1("ERROR: Not a VNC port. Banner: %s", data)
      return false, "Not a VNC port."
    end
    data = data:sub(1,11)
    local vncsec = {
      count = 1,
      types = {}
    }

    if ( not(status) ) then
      return status, "ERROR: VNC:handshake failed to receive protocol version"
    end

    self.protover = VNC.versions[data]
    local cli_version = data
    if ( not(self.protover) ) then
      stdnse.debug1("ERROR: VNC:handshake unsupported version (%s)", data)
      self.protover = string.match(data, "^RFB (%d+%.%d+)")
      --return false, ("Unsupported version (%s)"):format(data:sub(1,11))
      local versions = {
        "RFB 003.003",
        "RFB 003.007",
        "RFB 003.008",
        "RFB 003.889",
      }
      for i=1, #versions do
        if versions[i] >= data then
          break
        end
        cli_version = versions[i]
      end
    end

    self.client_version = VNC.versions[cli_version or "RFB 003.889"]
    status = self.socket:send( (cli_version or "RFB 003.889") .. "\n" )
    if ( not(status) ) then
      stdnse.debug1("ERROR: VNC:handshake failed to send client version")
      return false, "ERROR: VNC:handshake failed"
    end

    if ( self.client_version == "3.3" ) then
      local status, tmp = self.socket:receive_buf(match.numbytes(4), true)
      if( not(status) ) then
        return false, "VNC:handshake failed to receive security data"
      end

      vncsec.types[1] = string.unpack(">I4", tmp)
      self.vncsec = vncsec

      -- do we have an invalid security type, if so we need to handle an
      -- error condition
      if ( vncsec.types[1] == 0 ) then
        return process_error(self.socket)
      end
    else
      local status, tmp = self.socket:receive_buf(match.numbytes(1), true)
      if ( not(status) ) then
        stdnse.debug1("ERROR: VNC:handshake failed to receive security data")
        return false, "ERROR: VNC:handshake failed to receive security data"
      end

      vncsec.count = string.unpack("B", tmp)
      if ( vncsec.count == 0 ) then
        return process_error(self.socket)
      end
      status, tmp = self.socket:receive_buf(match.numbytes(vncsec.count), true)

      if ( not(status) ) then
        stdnse.debug1("ERROR: VNC:handshake failed to receive security data")
        return false, "ERROR: VNC:handshake failed to receive security data"
      end

      for i=1, vncsec.count do
        table.insert( vncsec.types, (string.unpack("B", tmp, i)) )
      end
      self.vncsec = vncsec
    end

    return true
  end,

  --- Creates the password bit-flip needed before DES encryption
  --
  -- @param password string containing the password to process
  -- @return password string containing the processed password
  createVNCDESKey = function( self, password )
    -- exactly 8 chars needed
    if #password > 8 then
      password = password:sub(1,8)
    elseif #password < 8 then
      password = password .. string.rep('\0', 8 - #password)
    end
    return password:gsub(".", function(c) return string.char(bits.reverse(c:byte())) end)
  end,

  --- Encrypts a password with the server's challenge to create the challenge response
  --
  -- @param password string containing the password to process
  -- @param challenge string containing the server challenge
  -- @return the challenge response string
  encryptVNCDES = function (self, password, challenge)
    local key = self:createVNCDESKey(password)
    return openssl.encrypt("des-ecb", key, nil, challenge, false)
  end,

  sendSecType = function (self, sectype)
    return self.socket:send( string.pack("B", sectype))
  end,

  --- Attempts to login to the VNC service using any supported method
  --
  -- @param username string, could be anything when VNCAuth is used
  -- @param password string containing the password to use for authentication
  -- @param authtype The VNC auth type from the <code>VNC.sectypes</code> table (default: best available method)
  -- @return status true on success, false on failure
  -- @return err string containing error message when status is false
  login = function( self, username, password, authtype )
    if ( not(password) ) then
      return false, "No password was supplied"
    end

    if not authtype then
      if self:supportsSecType( VNC.sectypes.NONE ) then
        self:sendSecType(VNC.sectypes.NONE)
        return self:login_none()

      elseif self:supportsSecType( VNC.sectypes.VNCAUTH ) then
        self:sendSecType(VNC.sectypes.VNCAUTH)
        return self:login_vncauth(username, password)

      elseif self:supportsSecType( VNC.sectypes.TLS ) then
        self:sendSecType(VNC.sectypes.TLS)
        return self:login_tls(username, password)

      elseif self:supportsSecType( VNC.sectypes.VENCRYPT ) then
        self:sendSecType(VNC.sectypes.VENCRYPT)
        return self:login_vencrypt(username, password)

      elseif self:supportsSecType( VNC.sectypes.TIGHT ) then
        self:sendSecType(VNC.sectypes.TIGHT)
        return self:login_tight(username, password)

      elseif self:supportsSecType( VNC.sectypes.MAC_OSX_SECTYPE_30 ) then
        self:sendSecType(VNC.sectypes.MAC_OSX_SECTYPE_30)
        return self:login_ard(username, password)

      else
        return false, "The server does not support any matching security type"
      end
    elseif ( not( self:supportsSecType( authtype ) ) ) then
      return false, string.format(
        'The server does not support the "%s" security type.', VNC.sectypes_str[authtype])
    end

  end,

  login_none = function (self)
    if self.client_version == "3.8" then
      return self:check_auth_result()
    end
    -- nothing to do here!
    return true
  end,

  --- Attempts to login to the VNC service using VNC Authentication
  --
  -- @param username string, could be anything when VNCAuth is used
  -- @param password string containing the password to use for authentication
  -- @return status true on success, false on failure
  -- @return err string containing error message when status is false
  login_vncauth = function( self, username, password )
    local status, chall = self.socket:receive_buf(match.numbytes(16), true)
    if ( not(status) ) then
      return false, "Failed to receive authentication challenge"
    end

    local resp = self:encryptVNCDES(password, chall)

    status = self.socket:send( resp )
    if ( not(status) ) then
      return false, "Failed to send authentication response to server"
    end
    return self:check_auth_result()
  end,

  check_auth_result = function(self)
    local status, result = self.socket:receive_buf(match.numbytes(4), true)
    if ( not(status) ) then
      return false, "Failed to retrieve authentication status from server"
    end

    if string.unpack(">I4", result) ~= 0 then
      return false, "Authentication failed"
    end
    return true
  end,

  handshake_aten = function(self, buffer)
    -- buffer is 24 bytes, currently unused, no idea what it's for.
    if #buffer ~= 24 then
      return false
    end
    self.aten = buffer
    return true
  end,

  login_aten = function(self, username, password)
    username = username or ""
    self.socket:send(username .. ("\0"):rep(24 - #username) .. password .. ("\0"):rep(24 - #password))
    return self:check_auth_result()
  end,

  handshake_tight = function(self)
    -- TightVNC security type
    -- https://vncdotool.readthedocs.org/en/0.8.0/rfbproto.html#tight-security-type
    -- Sometimes also ATEN KVM VNC:
    -- https://github.com/thefloweringash/chicken-aten-ikvm
    local status, buf = self.socket:receive_bytes(4)
    if not status then
      return false, "Failed to get number of tunnels"
    end
    -- If it's ATEN, it sends 24 bytes right away. Need to try parsing these
    -- in case it's TightVNC instead, though.
    local aten = #buf == 24 and buf
    local ntunnels, pos = string.unpack(">I4", buf)
    -- reasonable limits: ATEN might send a huge number here
    if ntunnels > 0x10000 then
      return self:handshake_aten(aten)
    end
    local tight = {
      tunnels = {},
      types = {}
    }
    if ntunnels > 0 then
      local have = #buf - pos + 1
      if have < 16 * ntunnels then
        local newbuf
        status, newbuf = self.socket:receive_bytes(16 * ntunnels - have)
        if not status then
          if aten then
            return self:handshake_aten(aten)
          end
          return false, "Failed to get list of tunnels"
        end
        buf = buf .. newbuf
        aten = false -- we must have read something beyond 24 bytes
      end

      local have_none_tunnel = false
      for i=1, ntunnels do
        local tunnel = {}
        tunnel.code, tunnel.vendor, tunnel.signature, pos = string.unpack(">I4 c4 c8", buf, pos)
        if tunnel.code == 0 then
          have_none_tunnel = true
        end
        tight.tunnels[#tight.tunnels+1] = tunnel
      end

      -- at this point, might still be ATEN with a first byte of 1, but chances are it's Tight
      if have_none_tunnel then
        -- Try the "NOTUNNEL" tunnel, for simplicity, if it's available.
        self.socket:send("\0\0\0\0")
      else
        -- for now, just return the first one. TODO: choose a supported tunnel type
        self.socket:send(string.pack(">I4", tight.tunnels[1].code))
      end
    end

    local have = #buf - pos + 1
    if have < 4 then
      local newbuf
      status, newbuf = self.socket:receive_bytes(4 - have)
      if not status then
        if aten then
          return self:handshake_aten(aten)
        end
        return false, "Failed to get number of Tight auth types"
      end
      buf = buf .. newbuf
      if #buf > 24 then aten = false end
    end
    local nauth
    nauth, pos = string.unpack(">I4", buf, pos)
    -- reasonable limits: ATEN might send a huge number here
    if nauth > 0x10000 then
      return self:handshake_aten(aten)
    end
    if nauth > 0 then
      have = #buf - pos + 1
      if have < 16 * nauth then
        local newbuf
        status, newbuf = self.socket:receive_bytes(16 * nauth - have)
        if not status then
          if aten then
            return self:handshake_aten(aten)
          end
          return false, "Failed to get list of Tight auth types"
        end
        buf = buf .. newbuf
        if #buf > 24 then aten = false end
      end

      for i=1, nauth do
        local auth = {}
        auth.code, auth.vendor, auth.signature, pos = string.unpack(">I4 c4 c8", buf, pos)
        tight.types[#tight.types+1] = auth
      end
    end

    if aten and pos < 24 then
      -- server sent 24 bytes but we could only parse some of them. Probably ATEN KVM
      return self:handshake_aten(aten)
    end

    self.tight = tight

    return true
  end,

  login_tight = function(self, username, password)
    local status, err = self:handshake_tight()
    if not status then
      return status, err
    end

    if self.aten then
      return self:login_aten(username, password)
    end

    if #self.tight.types == 0 then
      -- nothing further, no auth
      return true
    end

    -- choose a supported auth type
    for _, auth in ipairs({
        {1, "login_none"},
        {2, "login_vncauth"},
        {19, "login_vencrypt"},
      }) do
      for _, t in ipairs(self.tight.types) do
        if t.code == auth[1] then
          self.socket:send(string.pack(">I4", t.code))
          return self[auth[2]](self, username, password)
        end
      end
    end
    return false, "The server does not support any supported Tight security type"
  end,

  handshake_tls = function(self)
    local status, err = self.socket:reconnect_ssl()
    if not status then
      return false, "Failed to reconnect SSL"
    end

    local status, tmp = self.socket:receive_buf(match.numbytes(1), true)
    if ( not(status) ) then
      stdnse.debug1("ERROR: VNC:handshake failed to receive security data")
      return false, "ERROR: VNC:handshake failed to receive security data"
    end

    local vncsec = {
      count = 1,
      types = {}
    }
    vncsec.count = string.unpack("B", tmp)
    if ( vncsec.count == 0 ) then
      return process_error(self.socket)
    end
    status, tmp = self.socket:receive_buf(match.numbytes(vncsec.count), true)

    if ( not(status) ) then
      stdnse.debug1("ERROR: VNC:handshake failed to receive security data")
      return false, "ERROR: VNC:handshake failed to receive security data"
    end
    for i=1, vncsec.count do
      table.insert( vncsec.types, (string.unpack("B", tmp, i)) )
    end
    self.vncsec = vncsec
    return true
  end,

  login_tls = function( self, username, password )
    local status, err = self:handshake_tls()
    if not status then
      return status, err
    end
    return self:login(username, password)
  end,

  handshake_vencrypt = function(self)
    local status, buf = self.socket:receive_buf(match.numbytes(2), true)
    local maj, min, pos = string.unpack("BB", buf)
    if maj ~= 0 or min ~= 2 then
      return false, string.format("Unknown VeNCrypt version: %d.%d", maj, min)
    end
    self.socket:send(string.pack("BB", maj, min))
    status, buf = self.socket:receive_buf(match.numbytes(1), true)
    status, pos = string.unpack("B", buf)
    if status ~= 0 then
      return false, string.format("Server refused VeNCrypt version %d.%d", maj, min)
    end

    status, buf = self.socket:receive_buf(match.numbytes(1), true)
    local nauth, pos = string.unpack("B", buf)
    if nauth == 0 then
      return false, "No VeNCrypt auth subtypes received"
    end

    -- vencrypt auth types are u32
    status, buf = self.socket:receive_buf(match.numbytes(nauth * 4), true)
    pos = 1
    local vencrypt = {
      count = nauth,
      types = {}
    }
    for i=1, nauth do
      local auth
      auth, pos = string.unpack(">I4", buf, pos)
      table.insert(vencrypt.types, auth)
    end
    self.vencrypt = vencrypt
    return true
  end,

  login_vencrypt = function(self, username, password)
    local status, err = self:handshake_vencrypt()
    if not status then
      return status, err
    end

    local subauth = first_of({
        VENCRYPT_SUBTYPES.TLSNONE,
        VENCRYPT_SUBTYPES.X509NONE,
        VENCRYPT_SUBTYPES.PLAIN,
        VENCRYPT_SUBTYPES.TLSPLAIN,
        VENCRYPT_SUBTYPES.X509PLAIN,
        VENCRYPT_SUBTYPES.TLSVNC,
        VENCRYPT_SUBTYPES.X509VNC,
        -- These not supported yet
        --VENCRYPT_SUBTYPES.TLSSASL,
        --VENCRYPT_SUBTYPES.X509SASL,
      }, self.vencrypt.types)

    if not subauth then
      return false, "The server does not support any supported security type"
    end

    self.socket:send(string.pack(">I4", subauth))
    local status, buf = self.socket:receive_buf(match.numbytes(1), true)
    if not status or string.byte(buf, 1) ~= 1 then
      return false, "VeNCrypt auth subtype refused"
    end

    if subauth == VENCRYPT_SUBTYPES.PLAIN then
      return self:login_plain(username, password)
    end

    status, err = self.socket:reconnect_ssl()
    if not status then
      return false, "Failed to reconnect SSL to VNC server"
    end

    if subauth == VENCRYPT_SUBTYPES.TLSNONE or subauth == VENCRYPT_SUBTYPES.X509NONE then
      return self:check_auth_result()
    elseif subauth == VENCRYPT_SUBTYPES.TLSVNC or subauth == VENCRYPT_SUBTYPES.X509VNC then
      return self:login_vncauth(username, password)
    elseif subauth == VENCRYPT_SUBTYPES.TLSPLAIN or subauth == VENCRYPT_SUBTYPES.X509PLAIN then
      return self:login_plain(username, password)
    elseif subauth == VENCRYPT_SUBTYPES.TLSSASL or subauth == VENCRYPT_SUBTYPES.X509SASL then
      return self:login_sasl(username, password)
    end

  end,

  login_plain = function(self, username, password)
    username = username or ""
    local status = self.socket:send(string.pack(">I4 I4", #username, #password) .. username .. password)
    if not status then
      return false, "Failed to send plain auth"
    end

    return self:check_auth_result()
  end,

  login_sasl = function(self, username, password)
    -- TODO: support this!
    return false, "Unsupported"
  end,

  login_ard = function(self, username, password)
    -- Thanks to David Simmons for describing this protocol:
    -- https://cafbit.com/post/apple_remote_desktop_quirks/
    local status, buf = self.socket:receive_bytes(4)
    if not status then
      return false, "Failed to get auth material lengths"
    end
    local gen, keylen, pos = string.unpack(">I2I2", buf)
    if #buf - (pos - 1) < 2*keylen then
      local status, buf2 = self.socket:receive_bytes(2*keylen - #buf)
      if not status then
        return false, "Failed to get auth material"
      end
      buf = buf .. buf2
    end
    local modulus, pos = string.unpack("c"..keylen, buf, pos)
    local pubkey, pos = string.unpack("c"..keylen, buf, pos)

    -- DH key exchange
    pubkey = openssl.bignum_bin2bn(pubkey)
    modulus = openssl.bignum_bin2bn(modulus)
    gen = openssl.bignum_dec2bn(gen)

    local secret = openssl.bignum_pseudo_rand(512) -- 512 bit DH? yeah, ok.
    local ourkey = openssl.bignum_mod_exp(gen, secret, modulus)
    local shared = openssl.bignum_mod_exp(pubkey, secret, modulus)

    -- Pad shared secret with nulls
    shared = openssl.bignum_bn2bin(shared)
    shared = ('\0'):rep(keylen - #shared) .. shared

    -- Generate AES key as MD5 of shared DH secret
    local aeskey = openssl.md5(shared)

    -- Encrypt username and password with AES in ECB mode
    local blob = username .. ('\0'):rep(64 - #username) .. password .. ('\0'):rep(64 - #password)
    local hash = openssl.encrypt('aes-128-ecb', aeskey, '', blob, false)

    -- Send encrypted blob and DH public key
    local tmpkey = openssl.bignum_bn2bin(ourkey)
    -- pad public key on the left with nulls
    self.socket:send(hash .. ('\0'):rep(keylen - #tmpkey) .. tmpkey)

    return self:check_auth_result()
  end,

  --- Returns all supported security types as a table
  --
  -- @return table containing a entry for each security type
  getSecTypesAsTable = function( self )
    return get_types_as_table(self.vncsec, VNC.sectypes_str)
  end,
  getVencryptTypesAsTable = function (self)
    return get_types_as_table(self.vencrypt, VENCRYPT_SUBTYPES_STR)
  end,

  --- Checks if the supplied security type is supported or not
  --
  -- @param sectype number containing the security type to check for
  -- @return status true if supported, false if not supported
  supportsSecType = function( self, sectype )
    for i=1, self.vncsec.count do
      if ( self.vncsec.types[i] == sectype ) then
        return true
      end
    end
    return false
  end,

  --- Returns the protocol version reported by the server
  --
  -- @param version string containing the version number
  getProtocolVersion = function( self )
    return self.protover
  end,

  --- Send a ClientInit message.
  --@param shared boolean determining whether the screen should be shared, or whether other logged-on users should be booted.
  --@return status true if message was successful, false otherwise
  --@return table containing contents of ServerInit message, or error message.
  client_init = function (self, shared)
    self.socket:send(shared and "\x01" or "\x00")
    local status, buf = self.socket:receive_buf(match.numbytes(24), true)
    if not status then
      return false, "Did not receive ServerInit message"
    end
    local width, height, bpp, depth, bigendian, truecolor, rmax, gmax, bmax, rshift, gshift, bshift, pad1, pad2, namelen, pos = string.unpack(">I2I2 BBBB I2I2 I2BB BI2B I4", buf)
    local status, buf = self.socket:receive_buf(match.numbytes(namelen), true)
    if not status then
      return false, "Did not receive ServerInit desktop name"
    end
    local name = buf:sub(1,namelen)
    return true, {
      width = width,
      height = height,
      bpp = bpp,
      depth = depth,
      bigendian = bigendian,
      truecolor = truecolor,
      rmax = rmax,
      gmax = gmax,
      bmax = bmax,
      rshift = rshift,
      gshift = gshift,
      bshift = bshift,
      name = name
    }

  end
}

if not HAVE_SSL then
  local login_unsupported = function()
    return false, "Login type unsupported without OpenSSL"
  end
  VNC.login_vncauth = login_unsupported
  VNC.login_tls = login_unsupported
  VNC.login_ard = login_unsupported
end

local unittest = require "unittest"
if not unittest.testing() then
  return _ENV
end

test_suite = unittest.TestSuite:new()
-- Crypto tests require OpenSSL
if HAVE_SSL then
  local test_vectors = {
    -- from John the Ripper's vnc_fmt_plug.c
    -- pass, challenge, response
    {
      "1234567890",
      "\x2f\x75\x32\xb3\xef\xd1\x7e\xea\x5d\xd3\xa0\x94\x9f\xfd\xf1\xd8",
      "\x0e\xb4\x2d\x4d\x9a\xc1\xef\x1b\x6e\xf6\x64\x7b\x95\x94\xa6\x21"
    },
    {
      "123",
      "\x79\x63\xf9\xbb\x7b\xa6\xa4\x2a\x08\x57\x63\x80\x81\x56\xf5\x70",
      "\x47\x5b\x10\xd0\x56\x48\xe4\x11\x0d\x77\xf0\x39\x16\x10\x6f\x98"
    },
    {
      "Password",
      "\x08\x05\xb7\x90\xb5\x8e\x96\x7f\x2a\x35\x0a\x0c\x99\xde\x38\x81",
      "\xae\xcb\x26\xfa\xea\xaa\x62\xd7\x96\x36\xa5\x93\x4b\xac\x10\x78"
    },
    {
      "pass\xc2\xA3",
      "\x84\x07\x6f\x04\x05\x50\xee\xa9\x34\x19\x67\x63\x3b\x5f\x38\x55",
      "\x80\x75\x75\x68\x95\x82\x37\x9f\x7d\x80\x7f\x73\x6d\xe9\xe4\x34"
    },
  }

  for _, v in ipairs(test_vectors) do
    test_suite:add_test(unittest.equal(
      VNC:encryptVNCDES(v[1], v[2]), v[3]), v[1])
  end
end

return _ENV

Youez - 2016 - github.com/yon3zu
LinuXploit