-/*

- * Copyright (c) 2011 Remko Tronçon

- * Licensed under the GNU General Public License v3.

- * See Documentation/Licenses/GPLv3.txt for more information.

- */

-

-#include <Swiften/StringCodecs/SHA256.h>

-

-#include <cassert>

-#include <algorithm>

-#include <string.h>

-

-#pragma GCC diagnostic ignored "-Wold-style-cast"

-

-using namespace Swift;

-

-// Copied & adapted from LibTomCrypt, by Tom St Denis, tomstdenis@gmail.com, http://libtom.org

-// Substituted some macros by the platform-independent (slower) variants

-

-#include <stdlib.h>

-

-#define CRYPT_OK 0

-#define CRYPT_INVALID_ARG -1

-#define LTC_ARGCHK assert

-

-#define ROR(x, y) ( ((((unsigned long)(x)&0xFFFFFFFFUL)>>(unsigned long)((y)&31)) | ((unsigned long)(x)<<(unsigned long)(32-((y)&31)))) & 0xFFFFFFFFUL)

-#define RORc(x, y) ( ((((unsigned long)(x)&0xFFFFFFFFUL)>>(unsigned long)((y)&31)) | ((unsigned long)(x)<<(unsigned long)(32-((y)&31)))) & 0xFFFFFFFFUL)

-

-#define LOAD32H(x, y) \

- { x = ((unsigned long)((y)[0] & 255)<<24) | \

- ((unsigned long)((y)[1] & 255)<<16) | \

- ((unsigned long)((y)[2] & 255)<<8) | \

- ((unsigned long)((y)[3] & 255)); }

-

-#define STORE32H(x, y) \

- { (y)[0] = (unsigned char)(((x)>>24)&255); (y)[1] = (unsigned char)(((x)>>16)&255); \

- (y)[2] = (unsigned char)(((x)>>8)&255); (y)[3] = (unsigned char)((x)&255); }

-

-#define STORE64H(x, y) \

- { (y)[0] = (unsigned char)(((x)>>56)&255); (y)[1] = (unsigned char)(((x)>>48)&255); \

- (y)[2] = (unsigned char)(((x)>>40)&255); (y)[3] = (unsigned char)(((x)>>32)&255); \

- (y)[4] = (unsigned char)(((x)>>24)&255); (y)[5] = (unsigned char)(((x)>>16)&255); \

- (y)[6] = (unsigned char)(((x)>>8)&255); (y)[7] = (unsigned char)((x)&255); }

-

-/* a simple macro for making hash "process" functions */

-#define HASH_PROCESS(func_name, compress_name, state_var, block_size) \

-int func_name (State * md, const unsigned char *in, unsigned int inlen) \

-{ \

- unsigned long n; \

- int err; \

- LTC_ARGCHK(md != NULL); \

- LTC_ARGCHK(in != NULL || inlen == 0); \

- if (md-> curlen > sizeof(md->buf)) { \

- return CRYPT_INVALID_ARG; \

- } \

- while (inlen > 0) { \

- if (md->curlen == 0 && inlen >= block_size) { \

- if ((err = compress_name (md, (unsigned char *)in)) != CRYPT_OK) { \

- return err; \

- } \

- md-> length += block_size * 8; \

- in += block_size; \

- inlen -= block_size; \

- } else { \

- n = std::min(inlen, (block_size - md-> curlen)); \

- memcpy(md-> buf + md-> curlen, in, (size_t)n); \

- md-> curlen += n; \

- in += n; \

- inlen -= n; \

- if (md-> curlen == block_size) { \

- if ((err = compress_name (md, md-> buf)) != CRYPT_OK) { \

- return err; \

- } \

- md-> length += 8*block_size; \

- md-> curlen = 0; \

- } \

- } \

- } \

- return CRYPT_OK; \

-}

-

-#ifdef LTC_SMALL_CODE

-/* the K array */

-static const boost::uint32_t K[64] = {

- 0x428a2f98UL, 0x71374491UL, 0xb5c0fbcfUL, 0xe9b5dba5UL, 0x3956c25bUL,

- 0x59f111f1UL, 0x923f82a4UL, 0xab1c5ed5UL, 0xd807aa98UL, 0x12835b01UL,

- 0x243185beUL, 0x550c7dc3UL, 0x72be5d74UL, 0x80deb1feUL, 0x9bdc06a7UL,

- 0xc19bf174UL, 0xe49b69c1UL, 0xefbe4786UL, 0x0fc19dc6UL, 0x240ca1ccUL,

- 0x2de92c6fUL, 0x4a7484aaUL, 0x5cb0a9dcUL, 0x76f988daUL, 0x983e5152UL,

- 0xa831c66dUL, 0xb00327c8UL, 0xbf597fc7UL, 0xc6e00bf3UL, 0xd5a79147UL,

- 0x06ca6351UL, 0x14292967UL, 0x27b70a85UL, 0x2e1b2138UL, 0x4d2c6dfcUL,

- 0x53380d13UL, 0x650a7354UL, 0x766a0abbUL, 0x81c2c92eUL, 0x92722c85UL,

- 0xa2bfe8a1UL, 0xa81a664bUL, 0xc24b8b70UL, 0xc76c51a3UL, 0xd192e819UL,

- 0xd6990624UL, 0xf40e3585UL, 0x106aa070UL, 0x19a4c116UL, 0x1e376c08UL,

- 0x2748774cUL, 0x34b0bcb5UL, 0x391c0cb3UL, 0x4ed8aa4aUL, 0x5b9cca4fUL,

- 0x682e6ff3UL, 0x748f82eeUL, 0x78a5636fUL, 0x84c87814UL, 0x8cc70208UL,

- 0x90befffaUL, 0xa4506cebUL, 0xbef9a3f7UL, 0xc67178f2UL

-};

-#endif

-

-/* Various logical functions */

-#define Ch(x,y,z) (z ^ (x & (y ^ z)))

-#define Maj(x,y,z) (((x | y) & z) | (x & y))

-#define S(x, n) RORc((x),(n))

-#define R(x, n) (((x)&0xFFFFFFFFUL)>>(n))

-#define Sigma0(x) (S(x, 2) ^ S(x, 13) ^ S(x, 22))

-#define Sigma1(x) (S(x, 6) ^ S(x, 11) ^ S(x, 25))

-#define Gamma0(x) (S(x, 7) ^ S(x, 18) ^ R(x, 3))

-#define Gamma1(x) (S(x, 17) ^ S(x, 19) ^ R(x, 10))

-

-#ifdef LTC_CLEAN_STACK

-int SHA256::_compress(State * md, unsigned char *buf)

-#else

-int SHA256::compress(State * md, unsigned char *buf)

-#endif

-{

- boost::uint32_t S[8], W[64], t0, t1;

-#ifdef LTC_SMALL_CODE

- boost::uint32_t t;

-#endif

- int i;

-

- /* copy state into S */

- for (i = 0; i < 8; i++) {

- S[i] = md->state[i];

- }

-

- /* copy the state into 512-bits into W[0..15] */

- for (i = 0; i < 16; i++) {

- LOAD32H(W[i], buf + (4*i));

- }

-

- /* fill W[16..63] */

- for (i = 16; i < 64; i++) {

- W[i] = Gamma1(W[i - 2]) + W[i - 7] + Gamma0(W[i - 15]) + W[i - 16];

- }

-

- /* Compress */

-#ifdef LTC_SMALL_CODE

-#define RND(a,b,c,d,e,f,g,h,i) \

- t0 = h + Sigma1(e) + Ch(e, f, g) + K[i] + W[i]; \

- t1 = Sigma0(a) + Maj(a, b, c); \

- d += t0; \

- h = t0 + t1;

-

- for (i = 0; i < 64; ++i) {

- RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],i);

- t = S[7]; S[7] = S[6]; S[6] = S[5]; S[5] = S[4];

- S[4] = S[3]; S[3] = S[2]; S[2] = S[1]; S[1] = S[0]; S[0] = t;

- }

-#else

-#define RND(a,b,c,d,e,f,g,h,i,ki) \

- t0 = h + Sigma1(e) + Ch(e, f, g) + ki + W[i]; \

- t1 = Sigma0(a) + Maj(a, b, c); \

- d += t0; \

- h = t0 + t1;

-

- RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],0,0x428a2f98);

- RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],1,0x71374491);

- RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],2,0xb5c0fbcf);

- RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],3,0xe9b5dba5);

- RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],4,0x3956c25b);

- RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],5,0x59f111f1);

- RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],6,0x923f82a4);

- RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],7,0xab1c5ed5);

- RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],8,0xd807aa98);

- RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],9,0x12835b01);

- RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],10,0x243185be);

- RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],11,0x550c7dc3);

- RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],12,0x72be5d74);

- RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],13,0x80deb1fe);

- RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],14,0x9bdc06a7);

- RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],15,0xc19bf174);

- RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],16,0xe49b69c1);

- RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],17,0xefbe4786);

- RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],18,0x0fc19dc6);

- RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],19,0x240ca1cc);

- RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],20,0x2de92c6f);

- RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],21,0x4a7484aa);

- RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],22,0x5cb0a9dc);

- RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],23,0x76f988da);

- RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],24,0x983e5152);

- RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],25,0xa831c66d);

- RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],26,0xb00327c8);

- RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],27,0xbf597fc7);

- RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],28,0xc6e00bf3);

- RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],29,0xd5a79147);

- RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],30,0x06ca6351);

- RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],31,0x14292967);

- RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],32,0x27b70a85);

- RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],33,0x2e1b2138);

- RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],34,0x4d2c6dfc);

- RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],35,0x53380d13);

- RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],36,0x650a7354);

- RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],37,0x766a0abb);

- RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],38,0x81c2c92e);

- RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],39,0x92722c85);

- RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],40,0xa2bfe8a1);

- RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],41,0xa81a664b);

- RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],42,0xc24b8b70);

- RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],43,0xc76c51a3);

- RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],44,0xd192e819);

- RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],45,0xd6990624);

- RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],46,0xf40e3585);

- RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],47,0x106aa070);

- RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],48,0x19a4c116);

- RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],49,0x1e376c08);

- RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],50,0x2748774c);

- RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],51,0x34b0bcb5);

- RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],52,0x391c0cb3);

- RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],53,0x4ed8aa4a);

- RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],54,0x5b9cca4f);

- RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],55,0x682e6ff3);

- RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],56,0x748f82ee);

- RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],57,0x78a5636f);

- RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],58,0x84c87814);

- RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],59,0x8cc70208);

- RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],60,0x90befffa);

- RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],61,0xa4506ceb);

- RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],62,0xbef9a3f7);

- RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],63,0xc67178f2);

-

-#undef RND

-

-#endif

-

- /* feedback */

- for (i = 0; i < 8; i++) {

- md->state[i] = md->state[i] + S[i];

- }

- return CRYPT_OK;

-}

-

-#ifdef LTC_CLEAN_STACK

-int SHA256::compress(State * md, unsigned char *buf)

-{

- int err;

- err = SHA256::_compress(md, buf);

- burn_stack(sizeof(boost::uint32_t) * 74);

- return err;

-}

-#endif

-

-/**

- Initialize the hash state

- @param md The hash state you wish to initialize

- @return CRYPT_OK if successful

-*/

-int SHA256::init(State * md)

-{

- LTC_ARGCHK(md != NULL);

-

- md->curlen = 0;

- md->length = 0;

- md->state[0] = 0x6A09E667UL;

- md->state[1] = 0xBB67AE85UL;

- md->state[2] = 0x3C6EF372UL;

- md->state[3] = 0xA54FF53AUL;

- md->state[4] = 0x510E527FUL;

- md->state[5] = 0x9B05688CUL;

- md->state[6] = 0x1F83D9ABUL;

- md->state[7] = 0x5BE0CD19UL;

- return CRYPT_OK;

-}

-

-/**

- Process a block of memory though the hash

- @param md The hash state

- @param in The data to hash

- @param inlen The length of the data (octets)

- @return CRYPT_OK if successful

-*/

-HASH_PROCESS(SHA256::process, SHA256::compress, sha256, 64)

-

-/**

- Terminate the hash to get the digest

- @param md The hash state

- @param out [out] The destination of the hash (32 bytes)

- @return CRYPT_OK if successful

-*/

-int SHA256::done(State * md, unsigned char *out)

-{

- int i;

-

- LTC_ARGCHK(md != NULL);

- LTC_ARGCHK(out != NULL);

-

- if (md->curlen >= sizeof(md->buf)) {

- return CRYPT_INVALID_ARG;

- }

-

-

- /* increase the length of the message */

- md->length += md->curlen * 8;

-

- /* append the '1' bit */

- md->buf[md->curlen++] = (unsigned char)0x80;

-

- /* if the length is currently above 56 bytes we append zeros

- * then compress. Then we can fall back to padding zeros and length

- * encoding like normal.

- */

- if (md->curlen > 56) {

- while (md->curlen < 64) {

- md->buf[md->curlen++] = (unsigned char)0;

- }

- SHA256::compress(md, md->buf);

- md->curlen = 0;

- }

-

- /* pad upto 56 bytes of zeroes */

- while (md->curlen < 56) {

- md->buf[md->curlen++] = (unsigned char)0;

- }

-

- /* store length */

- STORE64H(md->length, md->buf+56);

- SHA256::compress(md, md->buf);

-

- /* copy output */

- for (i = 0; i < 8; i++) {

- STORE32H(md->state[i], out+(4*i));

- }

-#ifdef LTC_CLEAN_STACK

- zeromem(md, sizeof(State));

-#endif

- return CRYPT_OK;

-}

-

-// End copied code

-

-namespace Swift {

-

-SHA256::SHA256() {

- init(&state);

-}

-

-SHA256& SHA256::update(const std::vector<unsigned char>& input) {

- std::vector<unsigned char> inputCopy(input);

- process(&state, (boost::uint8_t*) vecptr(inputCopy), inputCopy.size());

- return *this;

-}

-

-std::vector<unsigned char> SHA256::getHash() const {

- std::vector<unsigned char> digest;

- digest.resize(256/8);

- State contextCopy(state);

- done(&contextCopy, (boost::uint8_t*) vecptr(digest));

- return digest;

-}

-

-template<typename Container>

-ByteArray SHA256::getHashInternal(const Container& input) {

- State context;

- init(&context);

-

- Container inputCopy(input);

- process(&context, (boost::uint8_t*) vecptr(inputCopy), inputCopy.size());

-

- ByteArray digest;

- digest.resize(256/8);

- done(&context, (boost::uint8_t*) vecptr(digest));

-

- return digest;

-}

-

-ByteArray SHA256::getHash(const ByteArray& input) {

- return getHashInternal(input);

-}

-

-ByteArray SHA256::getHash(const SafeByteArray& input) {

- return getHashInternal(input);

-}

-

-}