text: /*
   * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
   *
   * Licensed under the OpenSSL license (the "License").  You may not use
   * this file except in compliance with the License.  You can obtain a copy
   * in the file LICENSE in the source distribution or at
   * https://www.openssl.org/source/license.html
   */
  
  #ifndef HEADER_DES_H
  # define HEADER_DES_H
  
  # include <openssl/opensslconf.h>
  
  # ifndef OPENSSL_NO_DES
  # ifdef  __cplusplus
  extern "C" {
  # endif
  # include <openssl/e_os2.h>
  
  typedef unsigned int DES_LONG;
  
  # ifdef OPENSSL_BUILD_SHLIBCRYPTO
  #  undef OPENSSL_EXTERN
  #  define OPENSSL_EXTERN OPENSSL_EXPORT
  # endif
  
  typedef unsigned char DES_cblock[8];
  typedef /* const */ unsigned char const_DES_cblock[8];
  /*
   * With "const", gcc 2.8.1 on Solaris thinks that DES_cblock * and
   * const_DES_cblock * are incompatible pointer types.
   */
  
  typedef struct DES_ks {
      union {
          DES_cblock cblock;
          /*
           * make sure things are correct size on machines with 8 byte longs
           */
          DES_LONG deslong[2];
      } ks[16];
  } DES_key_schedule;
  
  # define DES_KEY_SZ      (sizeof(DES_cblock))
  # define DES_SCHEDULE_SZ (sizeof(DES_key_schedule))
  
  # define DES_ENCRYPT     1
  # define DES_DECRYPT     0
  
  # define DES_CBC_MODE    0
  # define DES_PCBC_MODE   1
  
  # define DES_ecb2_encrypt(i,o,k1,k2,e) \
          DES_ecb3_encrypt((i),(o),(k1),(k2),(k1),(e))
  
  # define DES_ede2_cbc_encrypt(i,o,l,k1,k2,iv,e) \
          DES_ede3_cbc_encrypt((i),(o),(l),(k1),(k2),(k1),(iv),(e))
  
  # define DES_ede2_cfb64_encrypt(i,o,l,k1,k2,iv,n,e) \
          DES_ede3_cfb64_encrypt((i),(o),(l),(k1),(k2),(k1),(iv),(n),(e))
  
  # define DES_ede2_ofb64_encrypt(i,o,l,k1,k2,iv,n) \
          DES_ede3_ofb64_encrypt((i),(o),(l),(k1),(k2),(k1),(iv),(n))
  
  OPENSSL_DECLARE_GLOBAL(int, DES_check_key); /* defaults to false */
  # define DES_check_key OPENSSL_GLOBAL_REF(DES_check_key)
  
  const char *DES_options(void);
  void DES_ecb3_encrypt(const_DES_cblock *input, DES_cblock *output,
                        DES_key_schedule *ks1, DES_key_schedule *ks2,
                        DES_key_schedule *ks3, int enc);
  DES_LONG DES_cbc_cksum(const unsigned char *input, DES_cblock *output,
                         long length, DES_key_schedule *schedule,
                         const_DES_cblock *ivec);
  /* DES_cbc_encrypt does not update the IV!  Use DES_ncbc_encrypt instead. */
  void DES_cbc_encrypt(const unsigned char *input, unsigned char *output,
                       long length, DES_key_schedule *schedule,
                       DES_cblock *ivec, int enc);
  void DES_ncbc_encrypt(const unsigned char *input, unsigned char *output,
                        long length, DES_key_schedule *schedule,
                        DES_cblock *ivec, int enc);
  void DES_xcbc_encrypt(const unsigned char *input, unsigned char *output,
                        long length, DES_key_schedule *schedule,
                        DES_cblock *ivec, const_DES_cblock *inw,
                        const_DES_cblock *outw, int enc);
  void DES_cfb_encrypt(const unsigned char *in, unsigned char *out, int numbits,
                       long length, DES_key_schedule *schedule,
                       DES_cblock *ivec, int enc);
  void DES_ecb_encrypt(const_DES_cblock *input, DES_cblock *output,
                       DES_key_schedule *ks, int enc);
  
  /*
   * This is the DES encryption function that gets called by just about every
   * other DES routine in the library.  You should not use this function except
   * to implement 'modes' of DES.  I say this because the functions that call
   * this routine do the conversion from 'char *' to long, and this needs to be
   * done to make sure 'non-aligned' memory access do not occur.  The
   * characters are loaded 'little endian'. Data is a pointer to 2 unsigned
   * long's and ks is the DES_key_schedule to use.  enc, is non zero specifies
   * encryption, zero if decryption.
   */
  void DES_encrypt1(DES_LONG *data, DES_key_schedule *ks, int enc);
  
  /*
   * This functions is the same as DES_encrypt1() except that the DES initial
   * permutation (IP) and final permutation (FP) have been left out.  As for
   * DES_encrypt1(), you should not use this function. It is used by the
   * routines in the library that implement triple DES. IP() DES_encrypt2()
   * DES_encrypt2() DES_encrypt2() FP() is the same as DES_encrypt1()
   * DES_encrypt1() DES_encrypt1() except faster :-).
   */
  void DES_encrypt2(DES_LONG *data, DES_key_schedule *ks, int enc);
  
  void DES_encrypt3(DES_LONG *data, DES_key_schedule *ks1,
                    DES_key_schedule *ks2, DES_key_schedule *ks3);
  void DES_decrypt3(DES_LONG *data, DES_key_schedule *ks1,
                    DES_key_schedule *ks2, DES_key_schedule *ks3);
  void DES_ede3_cbc_encrypt(const unsigned char *input, unsigned char *output,
                            long length,
                            DES_key_schedule *ks1, DES_key_schedule *ks2,
                            DES_key_schedule *ks3, DES_cblock *ivec, int enc);
  void DES_ede3_cfb64_encrypt(const unsigned char *in, unsigned char *out,
                              long length, DES_key_schedule *ks1,
                              DES_key_schedule *ks2, DES_key_schedule *ks3,
                              DES_cblock *ivec, int *num, int enc);
  void DES_ede3_cfb_encrypt(const unsigned char *in, unsigned char *out,
                            int numbits, long length, DES_key_schedule *ks1,
                            DES_key_schedule *ks2, DES_key_schedule *ks3,
                            DES_cblock *ivec, int enc);
  void DES_ede3_ofb64_encrypt(const unsigned char *in, unsigned char *out,
                              long length, DES_key_schedule *ks1,
                              DES_key_schedule *ks2, DES_key_schedule *ks3,
                              DES_cblock *ivec, int *num);
  char *DES_fcrypt(const char *buf, const char *salt, char *ret);
  char *DES_crypt(const char *buf, const char *salt);
  void DES_ofb_encrypt(const unsigned char *in, unsigned char *out, int numbits,
                       long length, DES_key_schedule *schedule,
                       DES_cblock *ivec);
  void DES_pcbc_encrypt(const unsigned char *input, unsigned char *output,
                        long length, DES_key_schedule *schedule,
                        DES_cblock *ivec, int enc);
  DES_LONG DES_quad_cksum(const unsigned char *input, DES_cblock output[],
                          long length, int out_count, DES_cblock *seed);
  int DES_random_key(DES_cblock *ret);
  void DES_set_odd_parity(DES_cblock *key);
  int DES_check_key_parity(const_DES_cblock *key);
  int DES_is_weak_key(const_DES_cblock *key);
  /*
   * DES_set_key (= set_key = DES_key_sched = key_sched) calls
   * DES_set_key_checked if global variable DES_check_key is set,
   * DES_set_key_unchecked otherwise.
   */
  int DES_set_key(const_DES_cblock *key, DES_key_schedule *schedule);
  int DES_key_sched(const_DES_cblock *key, DES_key_schedule *schedule);
  int DES_set_key_checked(const_DES_cblock *key, DES_key_schedule *schedule);
  void DES_set_key_unchecked(const_DES_cblock *key, DES_key_schedule *schedule);
  void DES_string_to_key(const char *str, DES_cblock *key);
  void DES_string_to_2keys(const char *str, DES_cblock *key1, DES_cblock *key2);
  void DES_cfb64_encrypt(const unsigned char *in, unsigned char *out,
                         long length, DES_key_schedule *schedule,
                         DES_cblock *ivec, int *num, int enc);
  void DES_ofb64_encrypt(const unsigned char *in, unsigned char *out,
                         long length, DES_key_schedule *schedule,
                         DES_cblock *ivec, int *num);
  
  # define DES_fixup_key_parity DES_set_odd_parity
  
  # ifdef  __cplusplus
  }
  # endif
  # endif
  
  #endif
  