개요

• 솔라나라에 설명된 어플리케이션에 대해 맨 페이지를 찾아 출력한다.
• MAN 페이지에 대한 설명은 윈디하나의 솔라나라: MAN 페이지을 참고하자.
• svcadm(8)을 검색하려면 섹션에서 8 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.

ecb_crypt(3)

DES_CRYPT(3)               Linux Programmer's Manual              DES_CRYPT(3)

NAME
       des_crypt,  ecb_crypt,  cbc_crypt, des_setparity, DES_FAILED - fast DES
       encryption

SYNOPSIS
       #include <rpc/des_crypt.h>

       int ecb_crypt(char *key, char *data, unsigned datalen,
                     unsigned mode);

       int cbc_crypt(char *key, char *data, unsigned datalen,
                     unsigned mode, char *ivec);

       void des_setparity(char *key);

       int DES_FAILED(int status);

DESCRIPTION
       ecb_crypt() and cbc_crypt() implement  the  NBS  DES  (Data  Encryption
       Standard).   These  routines  are  faster and more general purpose than
       crypt(3).  They also are able to utilize DES hardware if it  is  avail‐
       able.   ecb_crypt()  encrypts in ECB (Electronic Code Book) mode, which
       encrypts blocks of data independently.   cbc_crypt()  encrypts  in  CBC
       (Cipher  Block Chaining) mode, which chains together successive blocks.
       CBC mode protects against insertions, deletions  and  substitutions  of
       blocks.   Also,  regularities  in the clear text will not appear in the
       cipher text.

       Here is how to use these routines.  The first  argument,  key,  is  the
       8-byte  encryption key with parity.  To set the key's parity, which for
       DES is in the low bit of each byte, use  des_setparity().   The  second
       argument,  data,  contains  the data to be encrypted or decrypted.  The
       third argument, datalen, is the length in bytes of data, which must  be
       a  multiple  of  8.   The fourth argument, mode, is formed by ORing to‐
       gether some things.  For the encryption direction OR in either  DES_EN‐
       CRYPT  or  DES_DECRYPT.  For software versus hardware encryption, OR in
       either DES_HW or DES_SW.  If DES_HW is specified, and there is no hard‐
       ware, then the encryption is performed in software and the routine  re‐
       turns  DESERR_NOHWDEVICE.   For  cbc_crypt(),  the argument ivec is the
       8-byte initialization vector for the chaining.  It is  updated  to  the
       next initialization vector upon return.

RETURN VALUE
       DESERR_NONE         No error.
       DESERR_NOHWDEVICE   Encryption  succeeded, but done in software instead
                           of the requested hardware.
       DESERR_HWERROR      An error occurred in the hardware or driver.
       DESERR_BADPARAM     Bad argument to routine.

       Given a result status stat, the macro DES_FAILED(stat)  is  false  only
       for the first two statuses.

VERSIONS
       These functions are present in glibc 2.1 and later.

VERSIONS
       Because they employ the DES block cipher, which is no longer considered
       secure,  ecb_crypt(),  ecb_crypt(), crypt_r(), and des_setparity() were
       removed in glibc 2.28.  Applications should switch to a modern cryptog‐
       raphy library, such as libgcrypt.

ATTRIBUTES
       For an explanation of the terms  used  in  this  section,  see  attrib‐
       utes(7).   allbox;  lbw25  lb  lb  l l l.  Interface Attribute Value T{
       ecb_crypt(), cbc_crypt(), des_setparity() T}   Thread safety  MT-Safe

CONFORMING TO
       4.3BSD.  Not in POSIX.1.

SEE ALSO
       des(1), crypt(3), xcrypt(3)

COLOPHON
       This page is part of release 5.02 of the Linux  man-pages  project.   A
       description  of  the project, information about reporting bugs, and the
       latest    version    of    this    page,    can     be     found     at
       https://www.kernel.org/doc/man-pages/.

                                  2019-03-06                      DES_CRYPT(3)