crypt/crypt.h

   1 /*
   2  * UFC-crypt: ultra fast crypt(3) implementation
   3  *
   4  * Copyright (C) 1991-2013 Free Software Foundation, Inc.
   5  *
   6  * The GNU C Library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * The GNU C Library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with the GNU C Library; if not, see
  18  * <http://www.gnu.org/licenses/>.
  19  *
  20  * @(#)crypt.h  1.5 12/20/96
  21  *
  22  */
  23
  24 #ifndef _CRYPT_H
  25 #define _CRYPT_H        1
  26
  27 #include <features.h>
  28
  29 __BEGIN_DECLS
  30
  31 /* Encrypt at most 8 characters from KEY using salt to perturb DES.  */
  32 extern char *crypt (const char *__key, const char *__salt)
  33      __THROW __nonnull ((1, 2));
  34
  35 /* Setup DES tables according KEY.  */
  36 extern void setkey (const char *__key) __THROW __nonnull ((1));
  37
  38 /* Encrypt data in BLOCK in place if EDFLAG is zero; otherwise decrypt
  39    block in place.  */
  40 extern void encrypt (char *__block, int __edflag) __THROW __nonnull ((1));
  41
  42 #ifdef __USE_GNU
  43 /* Reentrant versions of the functions above.  The additional argument
  44    points to a structure where the results are placed in.  */
  45 struct crypt_data
  46   {
  47     char keysched[16 * 8];
  48     char sb0[32768];
  49     char sb1[32768];
  50     char sb2[32768];
  51     char sb3[32768];
  52     /* end-of-aligment-critical-data */
  53     char crypt_3_buf[14];
  54     char current_salt[2];
  55     long int current_saltbits;
  56     int  direction, initialized;
  57   };
  58
  59 extern char *crypt_r (const char *__key, const char *__salt,
  60                       struct crypt_data * __restrict __data)
  61      __THROW __nonnull ((1, 2, 3));
  62
  63 extern void setkey_r (const char *__key,
  64                       struct crypt_data * __restrict __data)
  65      __THROW __nonnull ((1, 2));
  66
  67 extern void encrypt_r (char *__block, int __edflag,
  68                        struct crypt_data * __restrict __data)
  69      __THROW __nonnull ((1, 3));
  70 #endif
  71
  72 __END_DECLS
  73
  74 #endif  /* crypt.h */