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.\" Copyright 2000 Nicolas Lichtmaier <nick@debian.org>
.\" Created 2000-07-22 00:52-0300
.\"
.\" This is free documentation; you can redistribute it and/or
.\" modify it under the terms of the GNU General Public License as
.\" published by the Free Software Foundation; either version 2 of
.\" the License, or (at your option) any later version.
.\"
.\" The GNU General Public License's references to "object code"
.\" and "executables" are to be interpreted as the output of any
.\" document formatting or typesetting system, including
.\" intermediate and printed output.
.\"
.\" This manual is distributed in the hope that it will be useful,
.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
.\" GNU General Public License for more details.
.\"
.\" Modified 2002-07-23 19:21:35 CEST 2002 Walter Harms
.\" <walter.harms@informatik.uni-oldenburg.de>
.\"
.\" Modified 2003-04-04, aeb
.\"
.\" Japanese Version Copyright (c) 2000-2004 Yuichi SATO
.\" all rights reserved.
.\" Translated Sun Sep 24 06:18:14 JST 2000
.\" by Yuichi SATO <sato@complex.eng.hokudai.ac.jp>
.\" Updated & Modified Sun Sep 7 13:20:43 JST 2003
.\" by Yuichi SATO <ysato444@yahoo.co.jp>
.\" Updated & Modified Sat Jan 17 01:27:31 JST 2004 by Yuichi SATO
.\"
.\"WORD: encrypt Ź沽
.\"WORD: decrypt 沽
.\"
.TH ENCRYPT 3 2003-04-04 "glibc2" "Cryptographic Functions"
.SH ̾
encrypt, setkey, encrypt_r, setkey_r \- 64 ӥåȤΥåŹ沽
.SH
.B #define _XOPEN_SOURCE
.br
.B #include <unistd.h>
.sp
.BI "void encrypt(char " block "[64], int " edflag );
.sp
.B #define _XOPEN_SOURCE
.br
.B #include <stdlib.h>
.sp
.BI "void setkey(const char *" key );
.sp
.B #define _GNU_SOURCE
.br
.BI "#include <crypt.h>"
.sp
.BI "void setkey_r (const char *" key ", struct crypt_data *" data );
.br
.BI "void encrypt_r (char *" block ", int " edflag ", struct crypt_data *" data );
.sp
δؿ
.B -lcrypt
ǥɬפ롣
.SH
δؿϡ64 ӥåȤΥåΰŹ沽沽Ԥ
.B setkey()
ؿ
.B encrypt()
ˤäƻȤŹ渰ꤹ롣
ǻȤ
.I key
64 ХȤǤꡢƥХȤϿ 1 ޤ 0 Ǥ롣
n=8*i-1 ФХ key[n] ̵뤵Τǡ
ͭʰŹ渰Ĺ 56 ӥåȤˤʤ롣
.PP
encrypt() ؿϡ
.I edflag
0 ξϰŹ沽1 Ϥ줿沽Ȥ褦ˡ
Ϥ줿Хåեѹ롣
key Ʊͤˡ
.I block
ϥɤ줿ºݤͤɽӥåȤǤ롣
̤ϤƱȤä֤롣
.PP
2 Ĥδؿϥꥨȥ (reentrant) ǤϤʤ
ĤޤŹ渰ǡŪΰ¸롣
ؿ
.B setkey_r()
.B encrypt_r()
ϥꥨȥȤʥСǤ롣
δؿϰŹ渰ǡݻ뤿˰ʲΤ褦ʹ¤ΤȤ
.RS
.nf
struct crypt_data {
char keysched[16 * 8];
char sb0[32768];
char sb1[32768];
char sb2[32768];
char sb3[32768];
char crypt_3_buf[14];
char current_salt[2];
long int current_saltbits;
int direction, initialized;
};
.fi
.RE
.B setkey_r()
ƤӽФˤϡ
.I data->initialized
0 ꤹ뤳ȡ
.SH ֤
δؿϡʤˤ֤ͤʤ
.SH 顼
嵭δؿƤӽФ
.I errno
0 ꤹ뤳ȡ
硢ͤѹʤ
.TP
.BR ENOSYS
(㤨аΥꥫ罰͢еʤɤˤ)
δؿƤʤ
.SH
glibc2.2 ǥѥ뤹ˤ libcrypt ȥɬפ롣
ºݤư뤿ˤϡ key[] txt[]
ͭʥӥåȥѥꤷʤФʤʤ
<crypt.h> إå롼ɤȡ̵ setkey() encrypt()
ץȥפդ뤳ȡ
.sp
.nf
#include <crypt.h>
main() {
char key[64]; /* Υӥåȥѥ */
char txt[64]; /* åΥӥåȥѥ */
setkey(key);
encrypt(txt, 0); /* */
encrypt(txt, 1); /* ǥ */
}
.fi
.SH
glibc2.2 Ǥϡδؿ DES 르ꥺȤ
.SH
ؿ
.B encrypt()
.B setkey()
SVID, SUSv2, POSIX 1003.1-2001 ˽롣
ؿ
.B encrypt_r()
.B setkey_r()
GNU ĥǤ롣
.SH Ϣ
.BR cbc_crypt (3),
.BR crypt (3),
.BR ecb_crypt (3),
.BR fcrypt (3)
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