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setkey, encrypt, des_setkey, des_cipher — DES ?Ź沽

?饤?֥???

FreeSec Crypt Library (libcipher, -lcipher)

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<unistd.h> int setkey(const char *key) int encrypt(char *block, int flag) int des_setkey(const char *key) int des_cipher(const char *in, char *out, long salt, int count)

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encrypt(), setkey(), des_setkey(), des_cipher() ?ؿ??ϡ? DES ???르?ꥺ???ؤΥ??????????ʤ??󶡤??ޤ??? setkey() ?ˤϡ??Х??ʥ??? (???? 0 ?ޤ??? 1) ?????? 64?Х??Ȥ????????Ϥ??ޤ??? ???????󤫤? 56 ?ӥåȤθ????????Ф????ޤ??? ?????ϡ??????? 8 ?Х??ȤΥ??롼?פ?ʬ?䤷???ƥ??롼?פκǸ??ΥӥåȤ? ̵?뤹?뤳?ȤǹԤʤ??ޤ??? ???ΥӥåȤ? DES ?ˤ????Х??ȥѥ??ƥ??????å??Τ?????ͽ?󤵤??Ƥ??ޤ????? ???????δؿ??Ϥ??ΥӥåȤ?̵?뤷?ޤ???

encrypt() ?ΰ??? block ???ޤ????Х??ʥ??ͤ????? 64 ?Х??Ȥ??????Ǥ??? flag ???ͤ? 0 ?ξ??硢 block ?ϰŹ沽?????ޤ????????ʳ??ξ????????沽?????ޤ??? setkey() ?ˤ??????ꤷ???????Ȥ??????????ͤ????????????ǡ? ???????̤ϸ??????? block ???֤????ޤ???

des_setkey() ?ΰ?????Ĺ?? 8 ?Υ????饯?????????Ǥ??? ?ƥ????饯???κDz??̥ӥå? (?ѥ??ƥ??ӥå?) ??̵?뤵?졢 ?Ĥ??ΥӥåȤ򤯤äĤ??? 56 ?ӥåȤθ??????????ޤ??? des_cipher() ?ؿ??? count ?? abs(3) ?? DES ?򷫤??֤??ơ? in ?ˤ??? 8 ?????饯???˳?Ǽ???줿 64 ?ӥåȤ??ͤ??Ź沽 ( count ?????ξ????????沽) ???? ???̤? 64 ?ӥåȤ? 8 ?????饯???ˤ??? out (?????ϡ? in ??Ʊ???????Ǥ⹽???ޤ???) ?˳?Ǽ???ޤ??? salt ?? DES ???르?ꥺ?????Ф???16777216 ?̤??ޤ??? 4096 ?̤? (?Ĥޤꡢ24 ?ӥåȤޤ??? 12 ?ӥå?) ???椫?? 1 ?̤??Ȥ????Ե?§????Ƴ?????ޤ? ( salt ?Υӥå? i ?????ꤵ???Ƥ??????硢 DES E-box ???????Υӥå? i ?ȥӥå? i+24 ?Ȥ??򴹤????ޤ?)??

setkey(), encrypt(), des_setkey(), des_cipher() ?ؿ??Ͻ????????????????? 0 ???֤??????Ԥ??????? 1 ???֤??ޤ???

setkey() ?? des_setkey() ?ؿ???Ʊ???????֤?????ޤ???

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login(1), passwd(1), crypt(3), getpass(3), passwd(5)

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???Υ饤?֥??? (FreeSec 1.0) ?ϡ??????ꥫ?罰???ΤߤǻȤ??? NetBSD libcrypt ?Ź沽?饤?֥??????Ф??ơ????Τ褦?ʾ㳲?Τʤ??֤??????Ȥ??? ?????ꥫ?罰???γ??dz?ȯ?????ޤ????? ?桼???ϡ????Υ????? (?Ȥ??Υ饤?֥???????Ū???󥯤????ץ???????) ?? ?罰???γ???͢?ФǤ??ʤ????Ȥ????򤷤Ƥ????ͤФʤ??ޤ??󡣤??äȤ⡢ ͢???Ǥ??뤳?Ȥ????餫?ʤΤǤ?????

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David Burren ⟨davidb@werj.com.au⟩