Zabbix

/* SHA512-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 */

#else

    #if defined(ZBX_OLD_SOLARIS)

        #include <sys/isa_defs.h>

    #else

        #include <machine/endian.h>

    #endif

#endif

#include <stdint.h>

#include <stdio.h>

#include <string.h>

​

/* Structure to save state of computation between the single steps.  */

struct sha512_ctx

{

    uint64_t H[8];

​

    uint64_t total[2];

    uint64_t buflen;

    char buffer[256];   /* NB: always correctly aligned for uint64_t.  */

};

​

#if __BYTE_ORDER == __LITTLE_ENDIAN

# define SWAP(n) \

    (((n) << 56)                    \

    | (((n) & 0xff00) << 40)            \

    | (((n) & 0xff0000) << 24)          \

    | (((n) & 0xff000000) << 8)         \

    | (((n) >> 8) & 0xff000000)         \

    | (((n) >> 24) & 0xff0000)          \

    | (((n) >> 40) & 0xff00)            \

    | ((n) >> 56))

#else

# define SWAP(n) (n)

#endif

​

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

64-byte boundary.  (FIPS 180-2:5.1.2)  */

static const unsigned char fillbuf[128] = { 0x80, 0 /* , 0, 0, ...  */ };

​

/* Constants for SHA512 from FIPS 180-2:4.2.3.  */

static const uint64_t K[80] =

{

    UINT64_C (0x428a2f98d728ae22), UINT64_C (0x7137449123ef65cd),

    UINT64_C (0xb5c0fbcfec4d3b2f), UINT64_C (0xe9b5dba58189dbbc),

    UINT64_C (0x3956c25bf348b538), UINT64_C (0x59f111f1b605d019),

    UINT64_C (0x923f82a4af194f9b), UINT64_C (0xab1c5ed5da6d8118),

    UINT64_C (0xd807aa98a3030242), UINT64_C (0x12835b0145706fbe),

    UINT64_C (0x243185be4ee4b28c), UINT64_C (0x550c7dc3d5ffb4e2),

    UINT64_C (0x72be5d74f27b896f), UINT64_C (0x80deb1fe3b1696b1),

    UINT64_C (0x9bdc06a725c71235), UINT64_C (0xc19bf174cf692694),

    UINT64_C (0xe49b69c19ef14ad2), UINT64_C (0xefbe4786384f25e3),

    UINT64_C (0x0fc19dc68b8cd5b5), UINT64_C (0x240ca1cc77ac9c65),