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CRYPT
Section: Library functions (3)Updated: September 3, 1994
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crypt - ¥Ñ¥¹¥ï¡¼¥É¤È¥Ç¡¼¥¿¤Î°Å¹æ²½½ñ¼°
#define _XOPEN_SOURCE#include <unistd.h>
char *crypt(const char *key, const char *salt);
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salt ¤Ï½¸¹ç [a-zA-Z0-9./] ¤«¤éÁª¤Ð¤ì¤¿2ʸ»ú¤Îʸ»úÎó¤Ç¤¢¤ë¡£ ¤³¤Îʸ»úÎó¤Ï¥¢¥ë¥´¥ê¥º¥à¤Î½ÐÎϤò4096Ä̤ê¤Ë¤«¤Í𤹤Τ˻Ȥï¤ì¤ë¡£
key ¤Î³Æʸ»ú¤«¤é²¼°Ì7¥Ó¥Ã¥È¤ò¤È¤Ã¤Æ56¥Ó¥Ã¥È¤Î¸°¤¬ÆÀ¤é¤ì¤ë¡£ ¤³¤Î56¥Ó¥Ã¥È¤Î¸°¤ÏÆÃÄê¤Îʸ»úÎó(¤Õ¤Ä¤¦¤Ï¤¹¤Ù¤Æ0¤Îʸ»úÎó) ¤ò·«¤êÊÖ¤·°Å¹æ²½¤¹¤ë¤Î¤ËÍѤ¤¤é¤ì¤ë¡£ ÊÖ¤êÃͤϰŹ沽¤µ¤ì¤¿¥Ñ¥¹¥ï¡¼¥É¤Ø¤Î¥Ý¥¤¥ó¥¿¤Ç¡¢13¤Î°õ»ú²Äǽ¤Ê ASCII ʸ»ú ¤«¤é¤Ê¤ë(ºÇ½é¤Î2ʸ»ú¤Ïsalt¤½¤Î¤â¤Î)¡£ ÊÖ¤êÃͤϡ¢´Ø¿ô¸Æ½Ð¤·¤Î¤¿¤Ó¤Ë¾å½ñ¤¤µ¤ì¤ëÀÅŪ¤Ê¥Ç¡¼¥¿¤Ø¤Î¥Ý¥¤¥ó¥¿¤Ç¤¢¤ë¡£
·Ù¹ð: ¸°¶õ´Ö¤Ï 2**56 = 7.2e16 ¤Î²Äǽ¤ÊÃͤ«¤éÀ®¤ë¡£ ¤³¤Î¸°¶õ´Ö¤ÎÁ´Ãµº÷¤Ï¶¯ÎϤÊÊÂÎó·×»»µ¡¤ò»È¤¨¤Ð²Äǽ¤Ç¤¢¤ë¡£¤Þ¤¿ crack(1) ¤Î¤è¤¦¤Ê¥½¥Õ¥È¥¦¥§¥¢¤Ï¤³¤Î¸°¶õ´Ö¤ÎÃæ¤Ç¡¢Â¿¤¯¤Î¤Ò¤È¤Ë¥Ñ¥¹¥ï¡¼¥É¤È¤·¤Æ»È ¤ï¤ì¤ë¤è¤¦¤Ê¸°¤Ë¤Ä¤¤¤Æ¤ÎÁ´Ãµº÷¤¬²Äǽ¤Ç¤¢¤ë¡£ ¤½¤ì¤æ¤¨¡¢¥Ñ¥¹¥ï¡¼¥É¤òÁªÂò¤¹¤ë¤È¤¤Ë¤Ï¡¢¤¹¤¯¤Ê¤¯¤È¤â¡¢ °ìÈÌŪ¤Ë»È¤ï¤ì¤ëñ¸ì¤È̾Á°¤ÏÈò¤±¤ë¤Ù¤¤Ç¤¢¤ë¡£ passwd(1) ¤ò»È¤¦»þ¤Ë¤Ï¥¯¥é¥Ã¥¯¤µ¤ì¤¦¤ë¥Ñ¥¹¥ï¡¼¥É¤Ë¤Ä¤¤¤Æ¤Î¸¡ºº¤ò¤¹¤ë¤³¤È¤¬ ¿ä¾©¤µ¤ì¤ë¡£
DES ¥¢¥ë¥´¥ê¥º¥à¤Ë¤Ï¤¤¤¯¤Ä¤«¤ÎÊʤ¬¤¢¤ê¡¢¤½¤ì¤Ë¤è¤Ã¤Æ¥Ñ¥¹¥ï¡¼¥Éǧ¾Ú°Ê³°¤Ë crypt(3) ¤ò»È¤¦¤Î¤Ï¤¿¤¤¤Ø¤ó¤è¤¯¤Ê¤¤ÁªÂò¤È¤Ê¤Ã¤Æ¤¤¤ë¡£¤â¤· crypt(3) ¤ò°Å¹æ¥×¥í¥¸¥§¥¯¥È¤Ë»È¤ª¤¦¤È¤¤¤¦°Æ¤ò¤â¤Ã¤Æ¤¤¤ë¤Ê¤é¤Ð¡¢¤½¤ì¤Ï¤ä¤á¤¿¤Û¤¦¤¬ ¤è¤¤¡£°Å¹æ²½¤Ë¤Ä¤¤¤Æ¤Î¤è¤¤ËܤÈï¤Ç¤âÆþ¼ê¤Ç¤¤ëDES¥é¥¤¥Ö¥é¥ê¤Î¤Ò¤È¤Ä¤ò¼ê ¤Ë¤¤¤ì¤ë¤Ù¤¤À¡£
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- ENOSYS
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SVID, X/OPEN, BSD 4.3´ØÏ¢¹àÌÜ
login(1), passwd(1), encrypt(3), getpass(3), passwd(5)