libfrog/sha512.c - pub/scm/linux/kernel/git/djwong/xfsprogs-dev - Git at Google

 /*
  * sha512.c --- The sha512 algorithm
  *
  * Copyright (C) 2004 Sam Hocevar <sam@hocevar.net>
  * (copied from libtomcrypt and then relicensed under GPLv2)
  * (and later copied from e2fsprogs)
  *
  * %Begin-Header%
  * This file may be redistributed under the terms of the GNU Library
  * General Public License, version 2.
  * %End-Header%
  */
 #include <string.h>
 #include "xfs.h"
 #include "libfrog/sha512.h"

 /* the K array */
 #define CONST64(n) n
 static const __u64 K[80] = {
 	CONST64(0x428a2f98d728ae22), CONST64(0x7137449123ef65cd),
 	CONST64(0xb5c0fbcfec4d3b2f), CONST64(0xe9b5dba58189dbbc),
 	CONST64(0x3956c25bf348b538), CONST64(0x59f111f1b605d019),
 	CONST64(0x923f82a4af194f9b), CONST64(0xab1c5ed5da6d8118),
 	CONST64(0xd807aa98a3030242), CONST64(0x12835b0145706fbe),
 	CONST64(0x243185be4ee4b28c), CONST64(0x550c7dc3d5ffb4e2),
 	CONST64(0x72be5d74f27b896f), CONST64(0x80deb1fe3b1696b1),
 	CONST64(0x9bdc06a725c71235), CONST64(0xc19bf174cf692694),
 	CONST64(0xe49b69c19ef14ad2), CONST64(0xefbe4786384f25e3),
 	CONST64(0x0fc19dc68b8cd5b5), CONST64(0x240ca1cc77ac9c65),
 	CONST64(0x2de92c6f592b0275), CONST64(0x4a7484aa6ea6e483),
 	CONST64(0x5cb0a9dcbd41fbd4), CONST64(0x76f988da831153b5),
 	CONST64(0x983e5152ee66dfab), CONST64(0xa831c66d2db43210),
 	CONST64(0xb00327c898fb213f), CONST64(0xbf597fc7beef0ee4),
 	CONST64(0xc6e00bf33da88fc2), CONST64(0xd5a79147930aa725),
 	CONST64(0x06ca6351e003826f), CONST64(0x142929670a0e6e70),
 	CONST64(0x27b70a8546d22ffc), CONST64(0x2e1b21385c26c926),
 	CONST64(0x4d2c6dfc5ac42aed), CONST64(0x53380d139d95b3df),
 	CONST64(0x650a73548baf63de), CONST64(0x766a0abb3c77b2a8),
 	CONST64(0x81c2c92e47edaee6), CONST64(0x92722c851482353b),
 	CONST64(0xa2bfe8a14cf10364), CONST64(0xa81a664bbc423001),
 	CONST64(0xc24b8b70d0f89791), CONST64(0xc76c51a30654be30),
 	CONST64(0xd192e819d6ef5218), CONST64(0xd69906245565a910),
 	CONST64(0xf40e35855771202a), CONST64(0x106aa07032bbd1b8),
 	CONST64(0x19a4c116b8d2d0c8), CONST64(0x1e376c085141ab53),
 	CONST64(0x2748774cdf8eeb99), CONST64(0x34b0bcb5e19b48a8),
 	CONST64(0x391c0cb3c5c95a63), CONST64(0x4ed8aa4ae3418acb),
 	CONST64(0x5b9cca4f7763e373), CONST64(0x682e6ff3d6b2b8a3),
 	CONST64(0x748f82ee5defb2fc), CONST64(0x78a5636f43172f60),
 	CONST64(0x84c87814a1f0ab72), CONST64(0x8cc702081a6439ec),
 	CONST64(0x90befffa23631e28), CONST64(0xa4506cebde82bde9),
 	CONST64(0xbef9a3f7b2c67915), CONST64(0xc67178f2e372532b),
 	CONST64(0xca273eceea26619c), CONST64(0xd186b8c721c0c207),
 	CONST64(0xeada7dd6cde0eb1e), CONST64(0xf57d4f7fee6ed178),
 	CONST64(0x06f067aa72176fba), CONST64(0x0a637dc5a2c898a6),
 	CONST64(0x113f9804bef90dae), CONST64(0x1b710b35131c471b),
 	CONST64(0x28db77f523047d84), CONST64(0x32caab7b40c72493),
 	CONST64(0x3c9ebe0a15c9bebc), CONST64(0x431d67c49c100d4c),
 	CONST64(0x4cc5d4becb3e42b6), CONST64(0x597f299cfc657e2a),
 	CONST64(0x5fcb6fab3ad6faec), CONST64(0x6c44198c4a475817)
 };
 #define Ch(x,y,z)       (z ^ (x & (y ^ z)))
 #define Maj(x,y,z)      (((x | y) & z) | (x & y))
 #define S(x, n)         ROR64c(x, n)
 #define R(x, n)         (((x)&CONST64(0xFFFFFFFFFFFFFFFF))>>((__u64)n))
 #define Sigma0(x)       (S(x, 28) ^ S(x, 34) ^ S(x, 39))
 #define Sigma1(x)       (S(x, 14) ^ S(x, 18) ^ S(x, 41))
 #define Gamma0(x)       (S(x, 1) ^ S(x, 8) ^ R(x, 7))
 #define Gamma1(x)       (S(x, 19) ^ S(x, 61) ^ R(x, 6))
 #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;
 #define STORE64H(x, y) \
 	do { \
 		(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); } while(0)

 #define LOAD64H(x, y)\
 	do {x = \
 		(((__u64)((y)[0] & 255)) << 56) |\
 		(((__u64)((y)[1] & 255)) << 48) |\
 		(((__u64)((y)[2] & 255)) << 40) |\
 		(((__u64)((y)[3] & 255)) << 32) |\
 		(((__u64)((y)[4] & 255)) << 24) |\
 		(((__u64)((y)[5] & 255)) << 16) |\
 		(((__u64)((y)[6] & 255)) << 8) |\
 		(((__u64)((y)[7] & 255)));\
 	} while(0)

 #define ROR64c(x, y) \
     ( ((((x)&CONST64(0xFFFFFFFFFFFFFFFF))>>((__u64)(y)&CONST64(63))) | \
       ((x)<<((__u64)(64-((y)&CONST64(63)))))) & CONST64(0xFFFFFFFFFFFFFFFF))

 static void sha512_compress(struct sha512_state * md, const unsigned char *buf)
 {
 	__u64 S[8], W[80], t0, t1;
 	int i;

 	/* copy state into S */
 	for (i = 0; i < 8; i++) {
 		S[i] = md->state[i];
 	}

 	/* copy the state into 1024-bits into W[0..15] */
 	for (i = 0; i < 16; i++) {
 		LOAD64H(W[i], buf + (8*i));
 	}

 	/* fill W[16..79] */
 	for (i = 16; i < 80; i++) {
 		W[i] = Gamma1(W[i - 2]) + W[i - 7] +
 			Gamma0(W[i - 15]) + W[i - 16];
 	}

 	for (i = 0; i < 80; i += 8) {
 		RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],i+0);
 		RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],i+1);
 		RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],i+2);
 		RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],i+3);
 		RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],i+4);
 		RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],i+5);
 		RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],i+6);
 		RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],i+7);
 	}

 	 /* feedback */
 	for (i = 0; i < 8; i++) {
 		md->state[i] = md->state[i] + S[i];
 	}
 }

 int sha512_init(struct sha512_state * md)
 {
 	md->curlen = 0;
 	md->length = 0;
 	md->state[0] = CONST64(0x6a09e667f3bcc908);
 	md->state[1] = CONST64(0xbb67ae8584caa73b);
 	md->state[2] = CONST64(0x3c6ef372fe94f82b);
 	md->state[3] = CONST64(0xa54ff53a5f1d36f1);
 	md->state[4] = CONST64(0x510e527fade682d1);
 	md->state[5] = CONST64(0x9b05688c2b3e6c1f);
 	md->state[6] = CONST64(0x1f83d9abfb41bd6b);
 	md->state[7] = CONST64(0x5be0cd19137e2179);
 	return 0;
 }

 int sha512_done(struct sha512_state * md, unsigned char *out)
 {
 	int i;

 	/* increase the length of the message */
 	md->length += md->curlen * CONST64(8);

 	/* append the '1' bit */
 	md->buf[md->curlen++] = (unsigned char)0x80;

 	/* if the length is currently above 112 bytes we append zeros then
 	 * compress. Then we can fall back to padding zeros and length encoding
 	 * like normal. */
 	if (md->curlen > 112) {
 		while (md->curlen < 128) {
 			md->buf[md->curlen++] = (unsigned char)0;
 		}
 		sha512_compress(md, md->buf);
 		md->curlen = 0;
 	}

 	/* pad up to 120 bytes of zeroes note: that from 112 to 120 is the 64 MSB
 	 * of the length. We assume that you won't hash > 2^64 bits of data. */
 	while (md->curlen < 120) {
 		md->buf[md->curlen++] = (unsigned char)0;
 	}

 	/* store length */
 	STORE64H(md->length, md->buf + 120);
 	sha512_compress(md, md->buf);

 	/* copy output */
 	for (i = 0; i < 8; i++) {
 		STORE64H(md->state[i], out+(8 * i));
 	}

 	return 0;
 }

 #define SHA512_BLOCKSIZE 128
 int sha512_process(struct sha512_state * md,
 		   const unsigned char *in,
 		   unsigned long inlen)
 {
 	unsigned long n;

 	while (inlen > 0) {
 		if (md->curlen == 0 && inlen >= SHA512_BLOCKSIZE) {
 			sha512_compress(md, in);
 			md->length += SHA512_BLOCKSIZE * 8;
 			in += SHA512_BLOCKSIZE;
 			inlen -= SHA512_BLOCKSIZE;
 		} else {
 			n = MIN(inlen, (SHA512_BLOCKSIZE - md->curlen));
 			memcpy(md->buf + md->curlen,
 			       in, (size_t)n);
 			md->curlen += n;
 			in += n;
 			inlen -= n;
 			if (md->curlen == SHA512_BLOCKSIZE) {
 				sha512_compress(md, md->buf);
 				md->length += SHA512_BLOCKSIZE * 8;
 				md->curlen = 0;
 			}
 		}
 	}

 	return 0;
 }

 void sha512(const unsigned char *in, unsigned long in_size, unsigned char *out)
 {
 	struct sha512_state md;

 	sha512_init(&md);
 	sha512_process(&md, in, in_size);
 	sha512_done(&md, out);
 }

 #ifdef SHA512_SELFTEST
 # include "sha512selftest.h"

 /*
  * make sure we always return 0 for a successful test run, and non-zero for a
  * failed run. The build infrastructure is looking for this information to
  * determine whether to allow the build to proceed.
  */
 int main(int argc, char **argv)
 {
 	int errors;

 	errors = sha512_test(0);

 	return errors != 0;
 }
 #endif /* SHA512_SELFTEST */
	/*
	* sha512.c --- The sha512 algorithm
	*
	* Copyright (C) 2004 Sam Hocevar <sam@hocevar.net>
	* (copied from libtomcrypt and then relicensed under GPLv2)
	* (and later copied from e2fsprogs)
	*
	* %Begin-Header%
	* This file may be redistributed under the terms of the GNU Library
	* General Public License, version 2.
	* %End-Header%
	*/
	#include <string.h>
	#include "xfs.h"
	#include "libfrog/sha512.h"

	/* the K array */
	#define CONST64(n) n
	static const __u64 K[80] = {
	CONST64(0x428a2f98d728ae22), CONST64(0x7137449123ef65cd),
	CONST64(0xb5c0fbcfec4d3b2f), CONST64(0xe9b5dba58189dbbc),
	CONST64(0x3956c25bf348b538), CONST64(0x59f111f1b605d019),
	CONST64(0x923f82a4af194f9b), CONST64(0xab1c5ed5da6d8118),
	CONST64(0xd807aa98a3030242), CONST64(0x12835b0145706fbe),
	CONST64(0x243185be4ee4b28c), CONST64(0x550c7dc3d5ffb4e2),
	CONST64(0x72be5d74f27b896f), CONST64(0x80deb1fe3b1696b1),
	CONST64(0x9bdc06a725c71235), CONST64(0xc19bf174cf692694),
	CONST64(0xe49b69c19ef14ad2), CONST64(0xefbe4786384f25e3),
	CONST64(0x0fc19dc68b8cd5b5), CONST64(0x240ca1cc77ac9c65),
	CONST64(0x2de92c6f592b0275), CONST64(0x4a7484aa6ea6e483),
	CONST64(0x5cb0a9dcbd41fbd4), CONST64(0x76f988da831153b5),
	CONST64(0x983e5152ee66dfab), CONST64(0xa831c66d2db43210),
	CONST64(0xb00327c898fb213f), CONST64(0xbf597fc7beef0ee4),
	CONST64(0xc6e00bf33da88fc2), CONST64(0xd5a79147930aa725),
	CONST64(0x06ca6351e003826f), CONST64(0x142929670a0e6e70),
	CONST64(0x27b70a8546d22ffc), CONST64(0x2e1b21385c26c926),
	CONST64(0x4d2c6dfc5ac42aed), CONST64(0x53380d139d95b3df),
	CONST64(0x650a73548baf63de), CONST64(0x766a0abb3c77b2a8),
	CONST64(0x81c2c92e47edaee6), CONST64(0x92722c851482353b),
	CONST64(0xa2bfe8a14cf10364), CONST64(0xa81a664bbc423001),
	CONST64(0xc24b8b70d0f89791), CONST64(0xc76c51a30654be30),
	CONST64(0xd192e819d6ef5218), CONST64(0xd69906245565a910),
	CONST64(0xf40e35855771202a), CONST64(0x106aa07032bbd1b8),
	CONST64(0x19a4c116b8d2d0c8), CONST64(0x1e376c085141ab53),
	CONST64(0x2748774cdf8eeb99), CONST64(0x34b0bcb5e19b48a8),
	CONST64(0x391c0cb3c5c95a63), CONST64(0x4ed8aa4ae3418acb),
	CONST64(0x5b9cca4f7763e373), CONST64(0x682e6ff3d6b2b8a3),
	CONST64(0x748f82ee5defb2fc), CONST64(0x78a5636f43172f60),
	CONST64(0x84c87814a1f0ab72), CONST64(0x8cc702081a6439ec),
	CONST64(0x90befffa23631e28), CONST64(0xa4506cebde82bde9),
	CONST64(0xbef9a3f7b2c67915), CONST64(0xc67178f2e372532b),
	CONST64(0xca273eceea26619c), CONST64(0xd186b8c721c0c207),
	CONST64(0xeada7dd6cde0eb1e), CONST64(0xf57d4f7fee6ed178),
	CONST64(0x06f067aa72176fba), CONST64(0x0a637dc5a2c898a6),
	CONST64(0x113f9804bef90dae), CONST64(0x1b710b35131c471b),
	CONST64(0x28db77f523047d84), CONST64(0x32caab7b40c72493),
	CONST64(0x3c9ebe0a15c9bebc), CONST64(0x431d67c49c100d4c),
	CONST64(0x4cc5d4becb3e42b6), CONST64(0x597f299cfc657e2a),
	CONST64(0x5fcb6fab3ad6faec), CONST64(0x6c44198c4a475817)
	};
	#define Ch(x,y,z) (z ^ (x & (y ^ z)))
	#define Maj(x,y,z) (((x \| y) & z) \| (x & y))
	#define S(x, n) ROR64c(x, n)
	#define R(x, n) (((x)&CONST64(0xFFFFFFFFFFFFFFFF))>>((__u64)n))
	#define Sigma0(x) (S(x, 28) ^ S(x, 34) ^ S(x, 39))
	#define Sigma1(x) (S(x, 14) ^ S(x, 18) ^ S(x, 41))
	#define Gamma0(x) (S(x, 1) ^ S(x, 8) ^ R(x, 7))
	#define Gamma1(x) (S(x, 19) ^ S(x, 61) ^ R(x, 6))
	#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;
	#define STORE64H(x, y) \
	do { \
	(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); } while(0)

	#define LOAD64H(x, y)\
	do {x = \
	(((__u64)((y)[0] & 255)) << 56) \|\
	(((__u64)((y)[1] & 255)) << 48) \|\
	(((__u64)((y)[2] & 255)) << 40) \|\
	(((__u64)((y)[3] & 255)) << 32) \|\
	(((__u64)((y)[4] & 255)) << 24) \|\
	(((__u64)((y)[5] & 255)) << 16) \|\
	(((__u64)((y)[6] & 255)) << 8) \|\
	(((__u64)((y)[7] & 255)));\
	} while(0)

	#define ROR64c(x, y) \
	( ((((x)&CONST64(0xFFFFFFFFFFFFFFFF))>>((__u64)(y)&CONST64(63))) \| \
	((x)<<((__u64)(64-((y)&CONST64(63)))))) & CONST64(0xFFFFFFFFFFFFFFFF))

	static void sha512_compress(struct sha512_state * md, const unsigned char *buf)
	{
	__u64 S[8], W[80], t0, t1;
	int i;

	/* copy state into S */
	for (i = 0; i < 8; i++) {
	S[i] = md->state[i];
	}

	/* copy the state into 1024-bits into W[0..15] */
	for (i = 0; i < 16; i++) {
	LOAD64H(W[i], buf + (8*i));
	}

	/* fill W[16..79] */
	for (i = 16; i < 80; i++) {
	W[i] = Gamma1(W[i - 2]) + W[i - 7] +
	Gamma0(W[i - 15]) + W[i - 16];
	}

	for (i = 0; i < 80; i += 8) {
	RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],i+0);
	RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],i+1);
	RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],i+2);
	RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],i+3);
	RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],i+4);
	RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],i+5);
	RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],i+6);
	RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],i+7);
	}

	/* feedback */
	for (i = 0; i < 8; i++) {
	md->state[i] = md->state[i] + S[i];
	}
	}

	int sha512_init(struct sha512_state * md)
	{
	md->curlen = 0;
	md->length = 0;
	md->state[0] = CONST64(0x6a09e667f3bcc908);
	md->state[1] = CONST64(0xbb67ae8584caa73b);
	md->state[2] = CONST64(0x3c6ef372fe94f82b);
	md->state[3] = CONST64(0xa54ff53a5f1d36f1);
	md->state[4] = CONST64(0x510e527fade682d1);
	md->state[5] = CONST64(0x9b05688c2b3e6c1f);
	md->state[6] = CONST64(0x1f83d9abfb41bd6b);
	md->state[7] = CONST64(0x5be0cd19137e2179);
	return 0;
	}

	int sha512_done(struct sha512_state * md, unsigned char *out)
	{
	int i;

	/* increase the length of the message */
	md->length += md->curlen * CONST64(8);

	/* append the '1' bit */
	md->buf[md->curlen++] = (unsigned char)0x80;

	/* if the length is currently above 112 bytes we append zeros then
	* compress. Then we can fall back to padding zeros and length encoding
	* like normal. */
	if (md->curlen > 112) {
	while (md->curlen < 128) {
	md->buf[md->curlen++] = (unsigned char)0;
	}
	sha512_compress(md, md->buf);
	md->curlen = 0;
	}

	/* pad up to 120 bytes of zeroes note: that from 112 to 120 is the 64 MSB
	* of the length. We assume that you won't hash > 2^64 bits of data. */
	while (md->curlen < 120) {
	md->buf[md->curlen++] = (unsigned char)0;
	}

	/* store length */
	STORE64H(md->length, md->buf + 120);
	sha512_compress(md, md->buf);

	/* copy output */
	for (i = 0; i < 8; i++) {
	STORE64H(md->state[i], out+(8 * i));
	}

	return 0;
	}

	#define SHA512_BLOCKSIZE 128
	int sha512_process(struct sha512_state * md,
	const unsigned char *in,
	unsigned long inlen)
	{
	unsigned long n;

	while (inlen > 0) {
	if (md->curlen == 0 && inlen >= SHA512_BLOCKSIZE) {
	sha512_compress(md, in);
	md->length += SHA512_BLOCKSIZE * 8;
	in += SHA512_BLOCKSIZE;
	inlen -= SHA512_BLOCKSIZE;
	} else {
	n = MIN(inlen, (SHA512_BLOCKSIZE - md->curlen));
	memcpy(md->buf + md->curlen,
	in, (size_t)n);
	md->curlen += n;
	in += n;
	inlen -= n;
	if (md->curlen == SHA512_BLOCKSIZE) {
	sha512_compress(md, md->buf);
	md->length += SHA512_BLOCKSIZE * 8;
	md->curlen = 0;
	}
	}
	}

	return 0;
	}

	void sha512(const unsigned char in, unsigned long in_size, unsigned char out)
	{
	struct sha512_state md;

	sha512_init(&md);
	sha512_process(&md, in, in_size);
	sha512_done(&md, out);
	}

	#ifdef SHA512_SELFTEST
	# include "sha512selftest.h"

	/*
	* make sure we always return 0 for a successful test run, and non-zero for a
	* failed run. The build infrastructure is looking for this information to
	* determine whether to allow the build to proceed.
	*/
	int main(int argc, char **argv)
	{
	int errors;

	errors = sha512_test(0);

	return errors != 0;
	}
	#endif /* SHA512_SELFTEST */