#include "config.h"
#include <string.h>
#include <assert.h>
#ifndef SHA512_DIGEST_LENGTH
#define SHA512_BLOCK_LENGTH 128
#define SHA512_DIGEST_LENGTH 64
#define SHA512_DIGEST_STRING_LENGTH (SHA512_DIGEST_LENGTH * 2 + 1)
typedef struct _SHA512_CTX {
uint64_t state[8];
uint64_t bitcount[2];
uint8_t buffer[SHA512_BLOCK_LENGTH];
} SHA512_CTX;
#endif
void SHA512_Init(SHA512_CTX*);
void SHA512_Update(SHA512_CTX*, void*, size_t);
void SHA512_Final(uint8_t[SHA512_DIGEST_LENGTH], SHA512_CTX*);
unsigned char *SHA512(void *data, unsigned int data_len, unsigned char *digest);
#if !defined(BYTE_ORDER) || (BYTE_ORDER != LITTLE_ENDIAN && BYTE_ORDER != BIG_ENDIAN)
#error Define BYTE_ORDER to be equal to either LITTLE_ENDIAN or BIG_ENDIAN
#endif
typedef uint8_t sha2_byte;
typedef uint32_t sha2_word32;
#ifdef S_SPLINT_S
typedef unsigned long long sha2_word64;
#else
typedef uint64_t sha2_word64;
#endif
#define SHA512_SHORT_BLOCK_LENGTH (SHA512_BLOCK_LENGTH - 16)
#if BYTE_ORDER == LITTLE_ENDIAN
#define REVERSE32(w,x) { \
sha2_word32 tmp = (w); \
tmp = (tmp >> 16) | (tmp << 16); \
(x) = ((tmp & 0xff00ff00UL) >> 8) | ((tmp & 0x00ff00ffUL) << 8); \
}
#ifndef S_SPLINT_S
#define REVERSE64(w,x) { \
sha2_word64 tmp = (w); \
tmp = (tmp >> 32) | (tmp << 32); \
tmp = ((tmp & 0xff00ff00ff00ff00ULL) >> 8) | \
((tmp & 0x00ff00ff00ff00ffULL) << 8); \
(x) = ((tmp & 0xffff0000ffff0000ULL) >> 16) | \
((tmp & 0x0000ffff0000ffffULL) << 16); \
}
#else
#define REVERSE64(w,x)
#endif
#endif
#define ADDINC128(w,n) { \
(w)[0] += (sha2_word64)(n); \
if ((w)[0] < (n)) { \
(w)[1]++; \
} \
}
#ifdef S_SPLINT_S
#undef ADDINC128
#define ADDINC128(w,n)
#endif
#if !defined(SHA2_USE_MEMSET_MEMCPY) && !defined(SHA2_USE_BZERO_BCOPY)
#define SHA2_USE_MEMSET_MEMCPY 1
#endif
#if defined(SHA2_USE_MEMSET_MEMCPY) && defined(SHA2_USE_BZERO_BCOPY)
#error Define either SHA2_USE_MEMSET_MEMCPY or SHA2_USE_BZERO_BCOPY, not both!
#endif
#ifdef SHA2_USE_MEMSET_MEMCPY
#define MEMSET_BZERO(p,l) memset((p), 0, (l))
#define MEMCPY_BCOPY(d,s,l) memcpy((d), (s), (l))
#endif
#ifdef SHA2_USE_BZERO_BCOPY
#define MEMSET_BZERO(p,l) bzero((p), (l))
#define MEMCPY_BCOPY(d,s,l) bcopy((s), (d), (l))
#endif
#define R(b,x) ((x) >> (b))
#define S64(b,x) (((x) >> (b)) | ((x) << (64 - (b))))
#define Ch(x,y,z) (((x) & (y)) ^ ((~(x)) & (z)))
#define Maj(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
#define Sigma0_512(x) (S64(28, (x)) ^ S64(34, (x)) ^ S64(39, (x)))
#define Sigma1_512(x) (S64(14, (x)) ^ S64(18, (x)) ^ S64(41, (x)))
#define sigma0_512(x) (S64( 1, (x)) ^ S64( 8, (x)) ^ R( 7, (x)))
#define sigma1_512(x) (S64(19, (x)) ^ S64(61, (x)) ^ R( 6, (x)))
static const sha2_word64 K512[80] = {
0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL,
0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL,
0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL,
0xd807aa98a3030242ULL, 0x12835b0145706fbeULL,
0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL,
0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL,
0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,
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,
0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL,
0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL,
0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
0x28db77f523047d84ULL, 0x32caab7b40c72493ULL,
0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL,
0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL
};
static const sha2_word64 sha512_initial_hash_value[8] = {
0x6a09e667f3bcc908ULL,
0xbb67ae8584caa73bULL,
0x3c6ef372fe94f82bULL,
0xa54ff53a5f1d36f1ULL,
0x510e527fade682d1ULL,
0x9b05688c2b3e6c1fULL,
0x1f83d9abfb41bd6bULL,
0x5be0cd19137e2179ULL
};
typedef union _ldns_sha2_buffer_union {
uint8_t* theChars;
uint64_t* theLongs;
} ldns_sha2_buffer_union;
void SHA512_Init(SHA512_CTX* context) {
if (context == (SHA512_CTX*)0) {
return;
}
MEMCPY_BCOPY(context->state, sha512_initial_hash_value, SHA512_DIGEST_LENGTH);
MEMSET_BZERO(context->buffer, SHA512_BLOCK_LENGTH);
context->bitcount[0] = context->bitcount[1] = 0;
}
static void SHA512_Transform(SHA512_CTX* context,
const sha2_word64* data) {
sha2_word64 a, b, c, d, e, f, g, h, s0, s1;
sha2_word64 T1, T2, *W512 = (sha2_word64*)context->buffer;
int j;
a = context->state[0];
b = context->state[1];
c = context->state[2];
d = context->state[3];
e = context->state[4];
f = context->state[5];
g = context->state[6];
h = context->state[7];
j = 0;
do {
#if BYTE_ORDER == LITTLE_ENDIAN
REVERSE64(*data++, W512[j]);
T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] + W512[j];
#else
T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] + (W512[j] = *data++);
#endif
T2 = Sigma0_512(a) + Maj(a, b, c);
h = g;
g = f;
f = e;
e = d + T1;
d = c;
c = b;
b = a;
a = T1 + T2;
j++;
} while (j < 16);
do {
s0 = W512[(j+1)&0x0f];
s0 = sigma0_512(s0);
s1 = W512[(j+14)&0x0f];
s1 = sigma1_512(s1);
T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] +
(W512[j&0x0f] += s1 + W512[(j+9)&0x0f] + s0);
T2 = Sigma0_512(a) + Maj(a, b, c);
h = g;
g = f;
f = e;
e = d + T1;
d = c;
c = b;
b = a;
a = T1 + T2;
j++;
} while (j < 80);
context->state[0] += a;
context->state[1] += b;
context->state[2] += c;
context->state[3] += d;
context->state[4] += e;
context->state[5] += f;
context->state[6] += g;
context->state[7] += h;
a = b = c = d = e = f = g = h = T1 = T2 = 0;
}
void SHA512_Update(SHA512_CTX* context, void *datain, size_t len) {
size_t freespace, usedspace;
const sha2_byte* data = (const sha2_byte*)datain;
if (len == 0) {
return;
}
assert(context != (SHA512_CTX*)0 && data != (sha2_byte*)0);
usedspace = (context->bitcount[0] >> 3) % SHA512_BLOCK_LENGTH;
if (usedspace > 0) {
freespace = SHA512_BLOCK_LENGTH - usedspace;
if (len >= freespace) {
MEMCPY_BCOPY(&context->buffer[usedspace], data, freespace);
ADDINC128(context->bitcount, freespace << 3);
len -= freespace;
data += freespace;
SHA512_Transform(context, (sha2_word64*)context->buffer);
} else {
MEMCPY_BCOPY(&context->buffer[usedspace], data, len);
ADDINC128(context->bitcount, len << 3);
usedspace = freespace = 0;
return;
}
}
while (len >= SHA512_BLOCK_LENGTH) {
SHA512_Transform(context, (sha2_word64*)data);
ADDINC128(context->bitcount, SHA512_BLOCK_LENGTH << 3);
len -= SHA512_BLOCK_LENGTH;
data += SHA512_BLOCK_LENGTH;
}
if (len > 0) {
MEMCPY_BCOPY(context->buffer, data, len);
ADDINC128(context->bitcount, len << 3);
}
usedspace = freespace = 0;
}
static void SHA512_Last(SHA512_CTX* context) {
size_t usedspace;
ldns_sha2_buffer_union cast_var;
usedspace = (context->bitcount[0] >> 3) % SHA512_BLOCK_LENGTH;
#if BYTE_ORDER == LITTLE_ENDIAN
REVERSE64(context->bitcount[0],context->bitcount[0]);
REVERSE64(context->bitcount[1],context->bitcount[1]);
#endif
if (usedspace > 0) {
context->buffer[usedspace++] = 0x80;
if (usedspace <= SHA512_SHORT_BLOCK_LENGTH) {
MEMSET_BZERO(&context->buffer[usedspace], SHA512_SHORT_BLOCK_LENGTH - usedspace);
} else {
if (usedspace < SHA512_BLOCK_LENGTH) {
MEMSET_BZERO(&context->buffer[usedspace], SHA512_BLOCK_LENGTH - usedspace);
}
SHA512_Transform(context, (sha2_word64*)context->buffer);
MEMSET_BZERO(context->buffer, SHA512_BLOCK_LENGTH - 2);
}
} else {
MEMSET_BZERO(context->buffer, SHA512_SHORT_BLOCK_LENGTH);
*context->buffer = 0x80;
}
cast_var.theChars = context->buffer;
cast_var.theLongs[SHA512_SHORT_BLOCK_LENGTH / 8] = context->bitcount[1];
cast_var.theLongs[SHA512_SHORT_BLOCK_LENGTH / 8 + 1] = context->bitcount[0];
SHA512_Transform(context, (sha2_word64*)context->buffer);
}
void SHA512_Final(sha2_byte digest[], SHA512_CTX* context) {
sha2_word64 *d = (sha2_word64*)digest;
assert(context != (SHA512_CTX*)0);
if (digest != (sha2_byte*)0) {
SHA512_Last(context);
#if BYTE_ORDER == LITTLE_ENDIAN
{
int j;
for (j = 0; j < 8; j++) {
REVERSE64(context->state[j],context->state[j]);
*d++ = context->state[j];
}
}
#else
MEMCPY_BCOPY(d, context->state, SHA512_DIGEST_LENGTH);
#endif
}
MEMSET_BZERO(context, sizeof(SHA512_CTX));
}
unsigned char *
SHA512(void *data, unsigned int data_len, unsigned char *digest)
{
SHA512_CTX ctx;
SHA512_Init(&ctx);
SHA512_Update(&ctx, data, data_len);
SHA512_Final(digest, &ctx);
return digest;
}