Zabbix

/* SHA256-based Unix crypt implementation.

Released into the Public Domain by Ulrich Drepper <drepper@redhat.com>.  */

​

#include "zbxhash.h"

​

#ifdef __linux__

    #include <endian.h>

#elif __hpux

/* Nothing to do in HP-UX */

#elif _AIX

/* Nothing to do in AIX */

#elif defined(_WINDOWS) || defined(__MINGW32__)

/* Nothing to do in Windows */

#else

    #if defined(ZBX_OLD_SOLARIS)

        #include <sys/isa_defs.h>

    #else

        #include <machine/endian.h>

    #endif

#endif

​

#if !(defined(_WINDOWS) || defined(__MINGW32__))

    #include <stdio.h>

    #include <string.h>

#endif

​

#if __BYTE_ORDER == __LITTLE_ENDIAN

# define SWAP(n) \

    (((n) << 24) | (((n) & 0xff00) << 8) | (((n) >> 8) & 0xff00) | ((n) >> 24))

#else

# define SWAP(n) (n)

#endif

​

/* This array contains the bytes used to pad the buffer to the next

64-byte boundary.  (FIPS 180-2:5.1.1)  */

static const unsigned char fillbuf[64] = { 0x80, 0 /* , 0, 0, ...  */ };

​

/* Constants for SHA256 from FIPS 180-2:4.2.2.  */

static const uint32_t K[64] =

{

    0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,

    0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,

    0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,

    0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,

    0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,

    0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,

    0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,

    0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,

    0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,

    0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,

    0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3,

    0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,

    0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5,

    0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,

    0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,

    0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2

};

​

/* Process LEN bytes of BUFFER, accumulating context into CTX.

It is assumed that LEN % 64 == 0.  */

static void

sha256_process_block (const void *buffer, size_t len, sha256_ctx *ctx)

{