From : Alex L Demidov                      2:5051/17.31
????????? ???? Crack, Jack, John The Ripper

???????:

1. ??? ???????? login.
Login ?????????? ? ???? User id ? password. ??????? ????????? ?????? ??
????????? DES ??? MD5. ?????????? ????????????? ?????? ????????? ????? ?
????????????? ?? ??????? ?? ????? /etc/passwd (??? ?????? ????? ?? shadow)
??????????????? ????????? UserId. ???? ?????? ?????????, ???? ??????? ?
???????.
???? ???, ??? ?????? ?? ???????????? UserId -???? ??????? Login incorrect.

2. ????????.
??-?? ????????? ???????????? Unix, ???? /etc/passwd ?????????? ???? ?????
????????? ??? ?????? ??? ????, ?.?. ???? ??????? ????? ?????? ? ???????, ?? ?
??????? ?????? ? ????? ? ????????. ????? ?? ?? ??????? - ?????? ???????????,
??????? ???????????? ?????????? (by design),?????? ??????? ????? ??????? ?????
???. H? ??? ?????????, ??? ???? ????? ??????? ??? ??????????, ????? ?????????
??????? ??????, ? ????????? ?????? ??? ????????? ????? ???????? (? ??????, ???
?
??????? ?????? ? ?????? ??????? - ?? ?????????? ????????? ?????). ???????????
??
????? ???????? ???? ????? ?????????????? ?????? - ?????, ????, ???, ? ?.?.
(H?????? ???? ????? ????? ??? ??????, ????????? ?? ????? ?????? ? ??????
????????, ??????????? ?????? ??? ?? ? ????? ??????? ? ????????). ???????, ?????
????? ??????????? ????????? ????????? ???????????? ???????, ? ??????????????
????? ????????, ???????? ??? ???? ?????????? ??????? ??????????? ??????????
??????.

3. ??? ???????? Crack ? ??? ?????????????.
???? ????????? ??? ?? ??? ? ?????, ????? ??????????, ??????? ??? ? ?????????? ?
????????????? ??????? ?? passwd, ??????? ? ????????? ???????. ??? ???? ????????
???????? - ????????? ????? ??????? ? ??????? ?? ??????? ???????. H???????? ??
????? ???? ?????????? ? ???, ??? ????? ????????? ??????? ???????????? ???????.
????? ??????, ??? ? ???????? ??????? ??????? ????? ?? ???????, ??? ??????????
??
?????? ???? ????, ??? ?????? ? ????? ?? passwd, ??? ?????? ????????
????????????? ?? ????????? ?????? ????????. John The Ripper ????? ???? ?????
??????? ????? (???????????? ?) ??? ?????? ???????????? ???????. ??????, ?????
????? ?????????? ????????? ?????? passwd ???? ?? ???? (??? ?? shadow, ??
????????? ??? ???????? ???????), ?? ??? ????????? ??????????. ?, ???-??,
?????????? ? JTR, ???????? ??? ?????? ??????? ??????????? ????? ? ???, ?????
??????? ??????? ??? ?????? (????? ???? :-)

4. ??? ?????????? ?? Crack'?.
???????????, ????????? ???????, ??-?? ??????? ????? ???????? ?????? ?????
????????, ?.?. ??????????? ??????? ????? ????? ? ????? ????????? ??????. ?
?????? ?????? ?????? ??????? ? shadow, ????????? ?????? ???? ??????, ?? ??????,
?????????? ??????? ???????????? ???????????? ????????, ??? ????????? ?????? ??
????????????? - ??? ?????????? ??????, ??? ???????? ???? ?? ?????? Crack'?.

5. ???? ?? ? ??? ???? ??????? ????-???????
H??. ????? ????? ?????????? ????? ?????? ????? ?????? shadow. ? ??? ?? ??????
?????? ? ???? ??????, ???? ????? ???? ??????, ??? ???????????? Crack'??. ???
???
Crack ??????? ?????????? ??????????? ?????? ??? ????, ????? ?????? ????
????????
??????? ??????, ????? ?????? ??????? ?????-?? ?????? ????????. ???? ?????, ???
??????? ???????? ?? ????? ????? ? ????????? ?????????? ? ???? ??? ? ???????
??????????, ?????????? ? ???????? ???????.

P.S. ????????? ??? ??? ????, ???? ??? ??????, ????? ????? ??????? ????????
????????.