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SHA-2 Cryptographic hash function

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As mentioned yesterday, I wanted to get SHA-2 up and running.... And here it is.

I've implemented the 512 byte digest and not the lower versions.

SHA-2 is a verifiable system (and the code does match the results from the original routine too)

The letters "abc" produce the hex string : ddaf35a193617abacc417349ae20413112e6fa4e89a97ea20a9eeee64b55d39a2192992a274fc1a836ba3c23a3feebbd454d4423643ce80e2a9ac94fa54ca49f

At the moment, it will only deal with passed strings - I'll get it dealing with data from files later on.

--- Code: (glbasic) ---LOCAL t\$="abc"
SHA2_Initialise()
SHA2_Process(t\$,LEN(t\$))
DEBUG "Digest : "+SHA2_Finish\$()+"\n"

--- End code ---

Main code :

--- Code: (glbasic) ---// --------------------------------- //
// Project: SHA-2
// Start: Tuesday, November 17, 2009
// IDE Version: 7.177

INLINE
#define SHA512_DIGEST_SIZE ( 512 / 8)
#define SHA512_BLOCK_SIZE  (1024 / 8)
#define SHFR(x, n)    (x >> n)
#define ROTR(x, n)   ((x >> n) | (x << ((sizeof(x) << 3) - n)))
#define ROTL(x, n)   ((x << n) | (x >> ((sizeof(x) << 3) - n)))
#define CH(x, y, z)  ((x & y) ^ (~x & z))
#define MAJ(x, y, z) ((x & y) ^ (x & z) ^ (y & z))
#define SHA512_F1(x) (ROTR(x, 28) ^ ROTR(x, 34) ^ ROTR(x, 39))
#define SHA512_F2(x) (ROTR(x, 14) ^ ROTR(x, 18) ^ ROTR(x, 41))
#define SHA512_F3(x) (ROTR(x,  1) ^ ROTR(x,  8) ^ SHFR(x,  7))
#define SHA512_F4(x) (ROTR(x, 19) ^ ROTR(x, 61) ^ SHFR(x,  6))

#define UNPACK32(x, str)                      \
{                                             \
*((str) + 3) = (uint8) ((x)      );       \
*((str) + 2) = (uint8) ((x) >>  8);       \
*((str) + 1) = (uint8) ((x) >> 16);       \
*((str) + 0) = (uint8) ((x) >> 24);       \
}

#define UNPACK64(x, str)                      \
{                                             \
*((str) + 7) = (uint8) ((x)      );       \
*((str) + 6) = (uint8) ((x) >>  8);       \
*((str) + 5) = (uint8) ((x) >> 16);       \
*((str) + 4) = (uint8) ((x) >> 24);       \
*((str) + 3) = (uint8) ((x) >> 32);       \
*((str) + 2) = (uint8) ((x) >> 40);       \
*((str) + 1) = (uint8) ((x) >> 48);       \
*((str) + 0) = (uint8) ((x) >> 56);       \
}

#define PACK64(str, x)                        \
{                                             \
*(x) =   ((uint64) *((str) + 7)      )    \
| ((uint64) *((str) + 6) <<  8)    \
| ((uint64) *((str) + 5) << 16)    \
| ((uint64) *((str) + 4) << 24)    \
| ((uint64) *((str) + 3) << 32)    \
| ((uint64) *((str) + 2) << 40)    \
| ((uint64) *((str) + 1) << 48)    \
| ((uint64) *((str) + 0) << 56);   \
}

#define SHA512_SCR(i)                         \
{                                             \
w[i] =  SHA512_F4(w[i -  2]) + w[i -  7]  \
+ SHA512_F3(w[i - 15]) + w[i - 16]; \
}

#define SHA512_EXP(a, b, c, d, e, f, g ,h, j)               \
{                                                           \
t1 = wv[h] + SHA512_F2(wv[e]) + CH(wv[e], wv[f], wv[g]) \
+ sha512_k[j] + w[j];                              \
t2 = SHA512_F1(wv[a]) + MAJ(wv[a], wv[b], wv[c]);       \
wv[d] += t1;                                            \
wv[h] = t1 + t2;                                        \
}

typedef unsigned char uint8;
typedef unsigned int  uint32;
typedef unsigned long long uint64;

typedef struct {
unsigned int tot_len;
unsigned int len;
unsigned char block[2 * SHA512_BLOCK_SIZE];
uint64 h[8];
} sha512_ctx;

typedef sha512_ctx sha384_ctx;

void sha512_init(sha512_ctx *ctx);
void sha512_update(sha512_ctx *ctx, const unsigned char *message,
unsigned int len);
void sha512_final(sha512_ctx *ctx, unsigned char *digest);
void sha512(const unsigned char *message, unsigned int len,
unsigned char *digest);

typedef unsigned int size_t;

extern "C" void *memcpy(void *destination, const void *source, size_t num );
extern "C" void *memset(void *ptr, int value, size_t num);
extern "C" int sprintf ( char * str, const char * format, ... );

uint64 sha512_h0[8] =
{0x6a09e667f3bcc908ULL, 0xbb67ae8584caa73bULL,
0x3c6ef372fe94f82bULL, 0xa54ff53a5f1d36f1ULL,
0x1f83d9abfb41bd6bULL, 0x5be0cd19137e2179ULL};

uint64 sha512_k[80] =
{0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL,
0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL,
0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL,
0xd807aa98a3030242ULL, 0x12835b0145706fbeULL,
0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL,
0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL,
0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL,
0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL,
0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL,
0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL,
0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
0x06ca6351e003826fULL, 0x142929670a0e6e70ULL,
0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL,
0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL,
0x81c2c92e47edaee6ULL, 0x92722c851482353bULL,
0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL,
0xd192e819d6ef5218ULL, 0xd69906245565a910ULL,
0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL,
0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL,
0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL,
0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL,
0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL,
0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL,
0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,
0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL,
0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
0x28db77f523047d84ULL, 0x32caab7b40c72493ULL,
0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL,
0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,

sha512_ctx userData;
unsigned char digest[SHA512_DIGEST_SIZE];

void sha512_transf(sha512_ctx *ctx, const unsigned char *message,unsigned int block_nb)
{
uint64 w[80];
uint64 wv[8];
uint64 t1, t2;
const unsigned char *sub_block;
int i, j;

for (i = 0; i < (int) block_nb; i++) {
sub_block = message + (i << 7);

#ifndef UNROLL_LOOPS
for (j = 0; j < 16; j++) {
PACK64(&sub_block[j << 3], &w[j]);
}

for (j = 16; j < 80; j++) {
SHA512_SCR(j);
}

for (j = 0; j < 8; j++) {
wv[j] = ctx->h[j];
}

for (j = 0; j < 80; j++) {
t1 = wv[7] + SHA512_F2(wv[4]) + CH(wv[4], wv[5], wv[6])
+ sha512_k[j] + w[j];
t2 = SHA512_F1(wv[0]) + MAJ(wv[0], wv[1], wv[2]);
wv[7] = wv[6];
wv[6] = wv[5];
wv[5] = wv[4];
wv[4] = wv[3] + t1;
wv[3] = wv[2];
wv[2] = wv[1];
wv[1] = wv[0];
wv[0] = t1 + t2;
}

for (j = 0; j < 8; j++) {
ctx->h[j] += wv[j];
}
#else
PACK64(&sub_block[  0], &w[ 0]); PACK64(&sub_block[  8], &w[ 1]);
PACK64(&sub_block[ 16], &w[ 2]); PACK64(&sub_block[ 24], &w[ 3]);
PACK64(&sub_block[ 32], &w[ 4]); PACK64(&sub_block[ 40], &w[ 5]);
PACK64(&sub_block[ 48], &w[ 6]); PACK64(&sub_block[ 56], &w[ 7]);
PACK64(&sub_block[ 64], &w[ 8]); PACK64(&sub_block[ 72], &w[ 9]);
PACK64(&sub_block[ 80], &w[10]); PACK64(&sub_block[ 88], &w[11]);
PACK64(&sub_block[ 96], &w[12]); PACK64(&sub_block[104], &w[13]);
PACK64(&sub_block[112], &w[14]); PACK64(&sub_block[120], &w[15]);

SHA512_SCR(16); SHA512_SCR(17); SHA512_SCR(18); SHA512_SCR(19);
SHA512_SCR(20); SHA512_SCR(21); SHA512_SCR(22); SHA512_SCR(23);
SHA512_SCR(24); SHA512_SCR(25); SHA512_SCR(26); SHA512_SCR(27);
SHA512_SCR(28); SHA512_SCR(29); SHA512_SCR(30); SHA512_SCR(31);
SHA512_SCR(32); SHA512_SCR(33); SHA512_SCR(34); SHA512_SCR(35);
SHA512_SCR(36); SHA512_SCR(37); SHA512_SCR(38); SHA512_SCR(39);
SHA512_SCR(40); SHA512_SCR(41); SHA512_SCR(42); SHA512_SCR(43);
SHA512_SCR(44); SHA512_SCR(45); SHA512_SCR(46); SHA512_SCR(47);
SHA512_SCR(48); SHA512_SCR(49); SHA512_SCR(50); SHA512_SCR(51);
SHA512_SCR(52); SHA512_SCR(53); SHA512_SCR(54); SHA512_SCR(55);
SHA512_SCR(56); SHA512_SCR(57); SHA512_SCR(58); SHA512_SCR(59);
SHA512_SCR(60); SHA512_SCR(61); SHA512_SCR(62); SHA512_SCR(63);
SHA512_SCR(64); SHA512_SCR(65); SHA512_SCR(66); SHA512_SCR(67);
SHA512_SCR(68); SHA512_SCR(69); SHA512_SCR(70); SHA512_SCR(71);
SHA512_SCR(72); SHA512_SCR(73); SHA512_SCR(74); SHA512_SCR(75);
SHA512_SCR(76); SHA512_SCR(77); SHA512_SCR(78); SHA512_SCR(79);

wv[0] = ctx->h[0]; wv[1] = ctx->h[1];
wv[2] = ctx->h[2]; wv[3] = ctx->h[3];
wv[4] = ctx->h[4]; wv[5] = ctx->h[5];
wv[6] = ctx->h[6]; wv[7] = ctx->h[7];

j = 0;

do {
SHA512_EXP(0,1,2,3,4,5,6,7,j); j++;
SHA512_EXP(7,0,1,2,3,4,5,6,j); j++;
SHA512_EXP(6,7,0,1,2,3,4,5,j); j++;
SHA512_EXP(5,6,7,0,1,2,3,4,j); j++;
SHA512_EXP(4,5,6,7,0,1,2,3,j); j++;
SHA512_EXP(3,4,5,6,7,0,1,2,j); j++;
SHA512_EXP(2,3,4,5,6,7,0,1,j); j++;
SHA512_EXP(1,2,3,4,5,6,7,0,j); j++;
} while (j < 80);

ctx->h[0] += wv[0]; ctx->h[1] += wv[1];
ctx->h[2] += wv[2]; ctx->h[3] += wv[3];
ctx->h[4] += wv[4]; ctx->h[5] += wv[5];
ctx->h[6] += wv[6]; ctx->h[7] += wv[7];
#endif /* !UNROLL_LOOPS */
}
}

void sha512(const unsigned char *message, unsigned int len,
unsigned char *digest)
{
sha512_ctx ctx;

sha512_init(&ctx);
sha512_update(&ctx, message, len);
sha512_final(&ctx, digest);
}

void sha512_init(sha512_ctx *ctx)
{
#ifndef UNROLL_LOOPS
int i;
for (i = 0; i < 8; i++) {
ctx->h[i] = sha512_h0[i];
}
#else
ctx->h[0] = sha512_h0[0]; ctx->h[1] = sha512_h0[1];
ctx->h[2] = sha512_h0[2]; ctx->h[3] = sha512_h0[3];
ctx->h[4] = sha512_h0[4]; ctx->h[5] = sha512_h0[5];
ctx->h[6] = sha512_h0[6]; ctx->h[7] = sha512_h0[7];
#endif /* !UNROLL_LOOPS */

ctx->len = 0;
ctx->tot_len = 0;
}

void sha512_update(sha512_ctx *ctx, const unsigned char *message,
unsigned int len)
{
unsigned int block_nb;
unsigned int new_len, rem_len, tmp_len;
const unsigned char *shifted_message;

tmp_len = SHA512_BLOCK_SIZE - ctx->len;
rem_len = len < tmp_len ? len : tmp_len;

memcpy(&ctx->block[ctx->len], message, rem_len);

if (ctx->len + len < SHA512_BLOCK_SIZE) {
ctx->len += len;
return;
}

new_len = len - rem_len;
block_nb = new_len / SHA512_BLOCK_SIZE;

shifted_message = message + rem_len;

sha512_transf(ctx, ctx->block, 1);
sha512_transf(ctx, shifted_message, block_nb);

rem_len = new_len % SHA512_BLOCK_SIZE;

memcpy(ctx->block, &shifted_message[block_nb << 7],
rem_len);

ctx->len = rem_len;
ctx->tot_len += (block_nb + 1) << 7;
}

void sha512_final(sha512_ctx *ctx, unsigned char *digest)
{
unsigned int block_nb;
unsigned int pm_len;
unsigned int len_b;

#ifndef UNROLL_LOOPS
int i;
#endif

block_nb = 1 + ((SHA512_BLOCK_SIZE - 17)
< (ctx->len % SHA512_BLOCK_SIZE));

len_b = (ctx->tot_len + ctx->len) << 3;
pm_len = block_nb << 7;

memset(ctx->block + ctx->len, 0, pm_len - ctx->len);
ctx->block[ctx->len] = 0x80;
UNPACK32(len_b, ctx->block + pm_len - 4);

sha512_transf(ctx, ctx->block, block_nb);

#ifndef UNROLL_LOOPS
for (i = 0 ; i < 8; i++) {
UNPACK64(ctx->h[i], &digest[i << 3]);
}
#else
UNPACK64(ctx->h[0], &digest[ 0]);
UNPACK64(ctx->h[1], &digest[ 8]);
UNPACK64(ctx->h[2], &digest[16]);
UNPACK64(ctx->h[3], &digest[24]);
UNPACK64(ctx->h[4], &digest[32]);
UNPACK64(ctx->h[5], &digest[40]);
UNPACK64(ctx->h[6], &digest[48]);
UNPACK64(ctx->h[7], &digest[56]);
#endif /* !UNROLL_LOOPS */
}
ENDINLINE

FUNCTION SHA2_Initialise%:
INLINE
sha512_init(&userData);
memset(&digest,(char) 0,sizeof(digest));
ENDINLINE
ENDFUNCTION

FUNCTION SHA2_Process%:data\$,length%
INLINE
sha512_update(&userData,(const unsigned char *) data_Str.c_str(),length);
ENDINLINE
ENDFUNCTION

FUNCTION SHA2_Finish\$:
LOCAL result\$

INLINE
sha512_final(&userData,(unsigned char *) &digest);
unsigned char output[2 * SHA512_DIGEST_SIZE + 1];
int i;

output[2 *  SHA512_DIGEST_SIZE] = '\0';

for (i = 0; i < (int)  SHA512_DIGEST_SIZE ; i++) {
sprintf((char *) output + 2 * i, "%02x", digest[i]);
}

result_Str.assign((char *) &output);
ENDINLINE

RETURN result\$
ENDFUNCTION
--- End code ---

And no, I dont understand any of it either - but it works, which is the main thing...

bigsofty:
Very impressive work, congrats in getting this beast to inline!  :booze:

Hatonastick:
Good to see you ignored SHA-1 which is not as safe as it once was.  I don't pretend to understand it all (maths was never my strong suit) but I have had a long interest in Cryptography.  I was (before I 'retired' from coding) looking to create a crypto library as I have a habit of doing that whenever I start using any new language.  Glad to see someone else is getting into it instead.  So when can we expect to see all the other usual algorithms?  =D

Seriously though, well done mate!  :booze:

The SHA-2 family may suffer from the same problem as SHA-1, although no attacks have been reported.  Using the 512 byte version certainly makes it harder to attack it though :)

I've now update the program to create the hash result from a file :

--- Code: (glbasic) ---// --------------------------------- //
// Project: SHA-2
// Start: Tuesday, November 17, 2009
// IDE Version: 7.177

INLINE
#define SHA512_DIGEST_SIZE ( 512 / 8)
#define SHA512_BLOCK_SIZE  (1024 / 8)
#define SHFR(x, n)    (x >> n)
#define ROTR(x, n)   ((x >> n) | (x << ((sizeof(x) << 3) - n)))
#define ROTL(x, n)   ((x << n) | (x >> ((sizeof(x) << 3) - n)))
#define CH(x, y, z)  ((x & y) ^ (~x & z))
#define MAJ(x, y, z) ((x & y) ^ (x & z) ^ (y & z))
#define SHA512_F1(x) (ROTR(x, 28) ^ ROTR(x, 34) ^ ROTR(x, 39))
#define SHA512_F2(x) (ROTR(x, 14) ^ ROTR(x, 18) ^ ROTR(x, 41))
#define SHA512_F3(x) (ROTR(x,  1) ^ ROTR(x,  8) ^ SHFR(x,  7))
#define SHA512_F4(x) (ROTR(x, 19) ^ ROTR(x, 61) ^ SHFR(x,  6))

#define UNPACK32(x, str)                      \
{                                             \
*((str) + 3) = (uint8) ((x)      );       \
*((str) + 2) = (uint8) ((x) >>  8);       \
*((str) + 1) = (uint8) ((x) >> 16);       \
*((str) + 0) = (uint8) ((x) >> 24);       \
}

#define UNPACK64(x, str)                      \
{                                             \
*((str) + 7) = (uint8) ((x)      );       \
*((str) + 6) = (uint8) ((x) >>  8);       \
*((str) + 5) = (uint8) ((x) >> 16);       \
*((str) + 4) = (uint8) ((x) >> 24);       \
*((str) + 3) = (uint8) ((x) >> 32);       \
*((str) + 2) = (uint8) ((x) >> 40);       \
*((str) + 1) = (uint8) ((x) >> 48);       \
*((str) + 0) = (uint8) ((x) >> 56);       \
}

#define PACK64(str, x)                        \
{                                             \
*(x) =   ((uint64) *((str) + 7)      )    \
| ((uint64) *((str) + 6) <<  8)    \
| ((uint64) *((str) + 5) << 16)    \
| ((uint64) *((str) + 4) << 24)    \
| ((uint64) *((str) + 3) << 32)    \
| ((uint64) *((str) + 2) << 40)    \
| ((uint64) *((str) + 1) << 48)    \
| ((uint64) *((str) + 0) << 56);   \
}

#define SHA512_SCR(i)                         \
{                                             \
w[i] =  SHA512_F4(w[i -  2]) + w[i -  7]  \
+ SHA512_F3(w[i - 15]) + w[i - 16]; \
}

#define SHA512_EXP(a, b, c, d, e, f, g ,h, j)               \
{                                                           \
t1 = wv[h] + SHA512_F2(wv[e]) + CH(wv[e], wv[f], wv[g]) \
+ sha512_k[j] + w[j];                              \
t2 = SHA512_F1(wv[a]) + MAJ(wv[a], wv[b], wv[c]);       \
wv[d] += t1;                                            \
wv[h] = t1 + t2;                                        \
}

typedef unsigned char uint8;
typedef unsigned int  uint32;
typedef unsigned long long uint64;

typedef struct {
unsigned int tot_len;
unsigned int len;
unsigned char block[2 * SHA512_BLOCK_SIZE];
uint64 h[8];
} sha512_ctx;

typedef sha512_ctx sha384_ctx;

void sha512_init(sha512_ctx *ctx);
void sha512_update(sha512_ctx *ctx, const unsigned char *message,
unsigned int len);
void sha512_final(sha512_ctx *ctx, unsigned char *digest);
void sha512(const unsigned char *message, unsigned int len,
unsigned char *digest);

typedef unsigned int size_t;

extern "C" void *memcpy(void *destination, const void *source, size_t num );
extern "C" void *memset(void *ptr, int value, size_t num);
extern "C" int sprintf ( char * str, const char * format, ... );
extern "C" int open(char * filename, int flags, int mode);
extern "C" int close(int fd);
extern "C" void * memset ( void * ptr, int value, size_t num );
extern "C" int read(int fd, void * ptr, int numbytes);

#define _O_RDONLY 0
#define _O_WRONLY 1
#define _O_RDWR 2

#define _O_ACCMODE (O_RDONLY|O_WRONLY|O_RDWR)

#define _O_APPEND 0x0008
#define _O_CREAT 0x0100
#define _O_TRUNC 0x0200
#define _O_EXCL 0x0400

#define _O_TEXT 0x4000
#define _O_BINARY 0x8000
#define _O_RAW _O_BINARY

#define _O_TEMPORARY 0x0040

#define _O_RANDOM 0x0010
#define _O_SEQUENTIAL _O_RANDOM
#define _O_SHORT_LIVED 0x1000

uint64 sha512_h0[8] =
{0x6a09e667f3bcc908ULL, 0xbb67ae8584caa73bULL,
0x3c6ef372fe94f82bULL, 0xa54ff53a5f1d36f1ULL,
0x1f83d9abfb41bd6bULL, 0x5be0cd19137e2179ULL};

uint64 sha512_k[80] =
{0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL,
0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL,
0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL,
0xd807aa98a3030242ULL, 0x12835b0145706fbeULL,
0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL,
0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL,
0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL,
0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL,
0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL,
0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL,
0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
0x06ca6351e003826fULL, 0x142929670a0e6e70ULL,
0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL,
0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL,
0x81c2c92e47edaee6ULL, 0x92722c851482353bULL,
0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL,
0xd192e819d6ef5218ULL, 0xd69906245565a910ULL,
0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL,
0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL,
0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL,
0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL,
0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL,
0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL,
0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,
0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL,
0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
0x28db77f523047d84ULL, 0x32caab7b40c72493ULL,
0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL,
0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,

sha512_ctx userData;
unsigned char digest[SHA512_DIGEST_SIZE];

void sha512_transf(sha512_ctx *ctx, const unsigned char *message,unsigned int block_nb)
{
uint64 w[80];
uint64 wv[8];
uint64 t1, t2;
const unsigned char *sub_block;
int i, j;

for (i = 0; i < (int) block_nb; i++) {
sub_block = message + (i << 7);

#ifndef UNROLL_LOOPS
for (j = 0; j < 16; j++) {
PACK64(&sub_block[j << 3], &w[j]);
}

for (j = 16; j < 80; j++) {
SHA512_SCR(j);
}

for (j = 0; j < 8; j++) {
wv[j] = ctx->h[j];
}

for (j = 0; j < 80; j++) {
t1 = wv[7] + SHA512_F2(wv[4]) + CH(wv[4], wv[5], wv[6])
+ sha512_k[j] + w[j];
t2 = SHA512_F1(wv[0]) + MAJ(wv[0], wv[1], wv[2]);
wv[7] = wv[6];
wv[6] = wv[5];
wv[5] = wv[4];
wv[4] = wv[3] + t1;
wv[3] = wv[2];
wv[2] = wv[1];
wv[1] = wv[0];
wv[0] = t1 + t2;
}

for (j = 0; j < 8; j++) {
ctx->h[j] += wv[j];
}
#else
PACK64(&sub_block[  0], &w[ 0]); PACK64(&sub_block[  8], &w[ 1]);
PACK64(&sub_block[ 16], &w[ 2]); PACK64(&sub_block[ 24], &w[ 3]);
PACK64(&sub_block[ 32], &w[ 4]); PACK64(&sub_block[ 40], &w[ 5]);
PACK64(&sub_block[ 48], &w[ 6]); PACK64(&sub_block[ 56], &w[ 7]);
PACK64(&sub_block[ 64], &w[ 8]); PACK64(&sub_block[ 72], &w[ 9]);
PACK64(&sub_block[ 80], &w[10]); PACK64(&sub_block[ 88], &w[11]);
PACK64(&sub_block[ 96], &w[12]); PACK64(&sub_block[104], &w[13]);
PACK64(&sub_block[112], &w[14]); PACK64(&sub_block[120], &w[15]);

SHA512_SCR(16); SHA512_SCR(17); SHA512_SCR(18); SHA512_SCR(19);
SHA512_SCR(20); SHA512_SCR(21); SHA512_SCR(22); SHA512_SCR(23);
SHA512_SCR(24); SHA512_SCR(25); SHA512_SCR(26); SHA512_SCR(27);
SHA512_SCR(28); SHA512_SCR(29); SHA512_SCR(30); SHA512_SCR(31);
SHA512_SCR(32); SHA512_SCR(33); SHA512_SCR(34); SHA512_SCR(35);
SHA512_SCR(36); SHA512_SCR(37); SHA512_SCR(38); SHA512_SCR(39);
SHA512_SCR(40); SHA512_SCR(41); SHA512_SCR(42); SHA512_SCR(43);
SHA512_SCR(44); SHA512_SCR(45); SHA512_SCR(46); SHA512_SCR(47);
SHA512_SCR(48); SHA512_SCR(49); SHA512_SCR(50); SHA512_SCR(51);
SHA512_SCR(52); SHA512_SCR(53); SHA512_SCR(54); SHA512_SCR(55);
SHA512_SCR(56); SHA512_SCR(57); SHA512_SCR(58); SHA512_SCR(59);
SHA512_SCR(60); SHA512_SCR(61); SHA512_SCR(62); SHA512_SCR(63);
SHA512_SCR(64); SHA512_SCR(65); SHA512_SCR(66); SHA512_SCR(67);
SHA512_SCR(68); SHA512_SCR(69); SHA512_SCR(70); SHA512_SCR(71);
SHA512_SCR(72); SHA512_SCR(73); SHA512_SCR(74); SHA512_SCR(75);
SHA512_SCR(76); SHA512_SCR(77); SHA512_SCR(78); SHA512_SCR(79);

wv[0] = ctx->h[0]; wv[1] = ctx->h[1];
wv[2] = ctx->h[2]; wv[3] = ctx->h[3];
wv[4] = ctx->h[4]; wv[5] = ctx->h[5];
wv[6] = ctx->h[6]; wv[7] = ctx->h[7];

j = 0;

do {
SHA512_EXP(0,1,2,3,4,5,6,7,j); j++;
SHA512_EXP(7,0,1,2,3,4,5,6,j); j++;
SHA512_EXP(6,7,0,1,2,3,4,5,j); j++;
SHA512_EXP(5,6,7,0,1,2,3,4,j); j++;
SHA512_EXP(4,5,6,7,0,1,2,3,j); j++;
SHA512_EXP(3,4,5,6,7,0,1,2,j); j++;
SHA512_EXP(2,3,4,5,6,7,0,1,j); j++;
SHA512_EXP(1,2,3,4,5,6,7,0,j); j++;
} while (j < 80);

ctx->h[0] += wv[0]; ctx->h[1] += wv[1];
ctx->h[2] += wv[2]; ctx->h[3] += wv[3];
ctx->h[4] += wv[4]; ctx->h[5] += wv[5];
ctx->h[6] += wv[6]; ctx->h[7] += wv[7];
#endif /* !UNROLL_LOOPS */
}
}

void sha512_init(sha512_ctx *ctx)
{
#ifndef UNROLL_LOOPS
int i;
for (i = 0; i < 8; i++) {
ctx->h[i] = sha512_h0[i];
}
#else
ctx->h[0] = sha512_h0[0]; ctx->h[1] = sha512_h0[1];
ctx->h[2] = sha512_h0[2]; ctx->h[3] = sha512_h0[3];
ctx->h[4] = sha512_h0[4]; ctx->h[5] = sha512_h0[5];
ctx->h[6] = sha512_h0[6]; ctx->h[7] = sha512_h0[7];
#endif /* !UNROLL_LOOPS */

ctx->len = 0;
ctx->tot_len = 0;
}

void sha512_update(sha512_ctx *ctx, const unsigned char *message,
unsigned int len)
{
unsigned int block_nb;
unsigned int new_len, rem_len, tmp_len;
const unsigned char *shifted_message;

tmp_len = SHA512_BLOCK_SIZE - ctx->len;
rem_len = len < tmp_len ? len : tmp_len;

memcpy(&ctx->block[ctx->len], message, rem_len);

if (ctx->len + len < SHA512_BLOCK_SIZE) {
ctx->len += len;
return;
}

new_len = len - rem_len;
block_nb = new_len / SHA512_BLOCK_SIZE;

shifted_message = message + rem_len;

sha512_transf(ctx, ctx->block, 1);
sha512_transf(ctx, shifted_message, block_nb);

rem_len = new_len % SHA512_BLOCK_SIZE;

memcpy(ctx->block, &shifted_message[block_nb << 7],
rem_len);

ctx->len = rem_len;
ctx->tot_len += (block_nb + 1) << 7;
}

void sha512_final(sha512_ctx *ctx, unsigned char *digest)
{
unsigned int block_nb;
unsigned int pm_len;
unsigned int len_b;

#ifndef UNROLL_LOOPS
int i;
#endif

block_nb = 1 + ((SHA512_BLOCK_SIZE - 17)
< (ctx->len % SHA512_BLOCK_SIZE));

len_b = (ctx->tot_len + ctx->len) << 3;
pm_len = block_nb << 7;

memset(ctx->block + ctx->len, 0, pm_len - ctx->len);
ctx->block[ctx->len] = 0x80;
UNPACK32(len_b, ctx->block + pm_len - 4);

sha512_transf(ctx, ctx->block, block_nb);

#ifndef UNROLL_LOOPS
for (i = 0 ; i < 8; i++) {
UNPACK64(ctx->h[i], &digest[i << 3]);
}
#else
UNPACK64(ctx->h[0], &digest[ 0]);
UNPACK64(ctx->h[1], &digest[ 8]);
UNPACK64(ctx->h[2], &digest[16]);
UNPACK64(ctx->h[3], &digest[24]);
UNPACK64(ctx->h[4], &digest[32]);
UNPACK64(ctx->h[5], &digest[40]);
UNPACK64(ctx->h[6], &digest[48]);
UNPACK64(ctx->h[7], &digest[56]);
#endif /* !UNROLL_LOOPS */
}
ENDINLINE

FUNCTION SHA2_Initialise%:
INLINE
sha512_init(&userData);
memset(&digest,(char) 0,sizeof(digest));
ENDINLINE
ENDFUNCTION

FUNCTION SHA2_Process%:data\$,length%
INLINE
sha512_update(&userData,(const unsigned char *) data_Str.c_str(),length);
ENDINLINE
ENDFUNCTION

FUNCTION SHA2_Finish\$:
LOCAL result\$

INLINE
sha512_final(&userData,(unsigned char *) &digest);
unsigned char output[2 * SHA512_DIGEST_SIZE + 1];
int i;

output[2 *  SHA512_DIGEST_SIZE] = '\0';

for (i = 0; i < (int)  SHA512_DIGEST_SIZE ; i++) {
sprintf((char *) output + 2 * i, "%02x", digest[i]);
}

result_Str.assign((char *) &output);
ENDINLINE

RETURN result\$
ENDFUNCTION

FUNCTION SHA2_FromFile\$:fileName\$,BYREF error%
LOCAL result\$

result\$=""

INLINE
int handle,length;
unsigned char output[2 * SHA512_DIGEST_SIZE + 1];
int i;

char buffer[4096];
error=0;
handle=open((char *) fileName_Str.c_str(),_O_RDONLY | _O_BINARY,0);
if (handle<0)
{
error=handle;
}
else
{
sha512_init(&userData);
memset(&digest,(char) 0,sizeof(digest));
memset(&buffer,(char) 0,sizeof(buffer));
do {
if (length<0)
{
error=length;
break;
}
else
if (length>0)
{
sha512_update(&userData,(const unsigned char *) &buffer,length);
}
} while (length>0);
}

if (handle>0)
{
close(handle);
}
ENDINLINE

// Now to finalise the result, if everything was okay
IF error%=0
RETURN SHA2_Finish\$()
ELSE
RETURN ""
ENDIF
ENDFUNCTION
--- End code ---