/*********************************************************************
*?Filename:???sha256.c
*?Author:?????Brad?Conte?（brad?AT?bradconte.com）
*?Copyright:
*?Disclaimer:?This?code?is?presented?“as?is“?without?any?guarantees.
*?Details:????Implementation?of?the?SHA-256?hashing?algorithm.
??????????????SHA-256?is?one?of?the?three?algorithms?in?the?SHA2
??????????????specification.?The?others?SHA-384?and?SHA-512?are?not
??????????????offered?in?this?implementation.
??????????????Algorithm?specification?can?be?found?here:
???????????????*?http://csrc.nist.gov/publications/fips/fips180-2/fips180-2withchangenotice.pdf
??????????????This?implementation?uses?little?endian?byte?order.
*********************************************************************/

/***************************?HEADER?FILES?***************************/
#include?
#include?
//#include?
#include?“sha256_2.h“

/******************************?MACROS?******************************/
#define?ROTLEFT（ab）?（（（a）?<>?（32-（b））））
#define?ROTRIGHT（ab）?（（（a）?>>?（b））?|?（（a）?<
#define?CH（xyz）?（（（x）?&?（y））?^?（~（x）?&?（z）））
#define?MAJ（xyz）?（（（x）?&?（y））?^?（（x）?&?（z））?^?（（y）?&?（z）））
#define?EP0（x）?（ROTRIGHT（x2）?^?ROTRIGHT（x13）?^?ROTRIGHT（x22））
#define?EP1（x）?（ROTRIGHT（x6）?^?ROTRIGHT（x11）?^?ROTRIGHT（x25））
#define?SIG0（x）?（ROTRIGHT（x7）?^?ROTRIGHT（x18）?^?（（x）?>>?3））
#define?SIG1（x）?（ROTRIGHT（x17）?^?ROTRIGHT（x19）?^?（（x）?>>?10））

/****************************?VARIABLES?*****************************/
static?const?WORD?k[64]?=?{
	0x428a2f980x713744910xb5c0fbcf0xe9b5dba50x3956c25b0x59f111f10x923f82a40xab1c5ed5
	0xd807aa980x12835b010x243185be0x550c7dc30x72be5d740x80deb1fe0x9bdc06a70xc19bf174
	0xe49b69c10xefbe47860x0fc19dc60x240ca1cc0x2de92c6f0x4a7484aa0x5cb0a9dc0x76f988da
	0x983e51520xa831c66d0xb00327c80xbf597fc70xc6e00bf30xd5a791470x06ca63510x14292967
	0x27b70a850x2e1b21380x4d2c6dfc0x53380d130x650a73540x766a0abb0x81c2c92e0x92722c85
	0xa2bfe8a10xa81a664b0xc24b8b700xc76c51a30xd192e8190xd69906240xf40e35850x106aa070
	0x19a4c1160x1e376c080x2748774c0x34b0bcb50x391c0cb30x4ed8aa4a0x5b9cca4f0x682e6ff3
	0x748f82ee0x78a5636f0x84c878140x8cc702080x90befffa0xa4506ceb0xbef9a3f70xc67178f2
};

/***********************?FUNCTION?DEFINITIONS?***********************/
static?void?sha256_transform（SHA256_CTX?*ctx?const?BYTE?data[]）
{
	WORD?a?b?c?d?e?f?g?h?i?j?t1?t2?m[64];

	for?（i?=?0?j?=?0;?i?		m[i]?=?（data[j]?<	for?（?;?i?		m[i]?=?SIG1（m[i?-?2]）?+?m[i?-?7]?+?SIG0（m[i?-?15]）?+?m[i?-?16];

	a?=?ctx->state[0];
	b?=?ctx->state[1];
	c?=?ctx->state[2];
	d?=?ctx->state[3];
	e?=?ctx->state[4];
	f?=?ctx->state[5];
	g?=?ctx->state[6];
	h?=?ctx->state[7];

	for?（i?=?0;?i?		t1?=?h?+?EP1（e）?+?CH（efg）?+?k[i]?+?m[i];
		t2?=?EP0

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????5664??2017-07-28?16:50??sha256_2.c

?????文件???????1155??2017-07-28?16:55??sha256_2.h

-----------?---------??----------?-----??----

?????????????????6819????????????????????2