lynq/MD310EU/ap/app/dmp-test/util/util_sha256.c

/*******************************************************************************
* Author		  :  author
* Version		  :  V1.0
* Date			  :  2021-07-27
* Description	  :  util_sha256.c
********************************************************************************/

/********************************* Include File ********************************/
#include <stdlib.h>
#include <string.h>
#include "util_sha256.h"


/********************************* Macro Definition ****************************/
#define SHR(x,n) ((x & 0xFFFFFFFF) >> n)
#define ROTR(x,n) (SHR(x,n) | (x << (32 - n)))	
#define S0(x) (ROTR(x, 7) ^ ROTR(x,18) ^  SHR(x, 3))
#define S1(x) (ROTR(x,17) ^ ROTR(x,19) ^  SHR(x,10))
#define S2(x) (ROTR(x, 2) ^ ROTR(x,13) ^ ROTR(x,22))
#define S3(x) (ROTR(x, 6) ^ ROTR(x,11) ^ ROTR(x,25))

#define F0(x,y,z) ((x & y) | (z & (x | y)))
#define F1(x,y,z) (z ^ (x & (y ^ z)))

#define R(t)  (M[t] = S1(M[t-2]) + M[t-7] + S0(M[t-15]) + M[t-16])
#define P(a,b,c,d,e,f,g,h,x,K)                  \
			{												\
				tep = h + S3(e) + F1(e,f,g) + K + x;		\
				tep1 = S2(a) + F0(a,b,c);					\
				d += tep; h = tep + tep1;				\
			}

#ifndef GET_UINT32_BE
#define GET_UINT32_BE(n,b,i)                            \
		do {													\
			(n) = ( (uint32_t) (b)[(i)	  ] << 24 ) 			\
				  | ( (uint32_t) (b)[(i) + 1] << 16 )			  \
				  | ( (uint32_t) (b)[(i) + 2] <<  8 )			  \
				  | ( (uint32_t) (b)[(i) + 3]		);			  \
		} while( 0 )
#endif

#ifndef PUT_UINT32_BE
#define PUT_UINT32_BE(n,b,i)                            \
    do {                                                    \
        (b)[(i)    ] = (unsigned char) ( (n) >> 24 );       \
        (b)[(i) + 1] = (unsigned char) ( (n) >> 16 );       \
        (b)[(i) + 2] = (unsigned char) ( (n) >>  8 );       \
        (b)[(i) + 3] = (unsigned char) ( (n)       );       \
    } while( 0 )
#endif


/********************************* Type Definition *****************************/


/********************************* Variables ***********************************/
static const uint32_t K[] = {
    0x428A2F98, 0x71374491, 0xB5C0FBCF, 0xE9B5DBA5,
    0x3956C25B, 0x59F111F1, 0x923F82A4, 0xAB1C5ED5,
    0xD807AA98, 0x12835B01, 0x243185BE, 0x550C7DC3,
    0x72BE5D74, 0x80DEB1FE, 0x9BDC06A7, 0xC19BF174,
    0xE49B69C1, 0xEFBE4786, 0x0FC19DC6, 0x240CA1CC,
    0x2DE92C6F, 0x4A7484AA, 0x5CB0A9DC, 0x76F988DA,
    0x983E5152, 0xA831C66D, 0xB00327C8, 0xBF597FC7,
    0xC6E00BF3, 0xD5A79147, 0x06CA6351, 0x14292967,
    0x27B70A85, 0x2E1B2138, 0x4D2C6DFC, 0x53380D13,
    0x650A7354, 0x766A0ABB, 0x81C2C92E, 0x92722C85,
    0xA2BFE8A1, 0xA81A664B, 0xC24B8B70, 0xC76C51A3,
    0xD192E819, 0xD6990624, 0xF40E3585, 0x106AA070,
    0x19A4C116, 0x1E376C08, 0x2748774C, 0x34B0BCB5,
    0x391C0CB3, 0x4ED8AA4A, 0x5B9CCA4F, 0x682E6FF3,
    0x748F82EE, 0x78A5636F, 0x84C87814, 0x8CC70208,
    0x90BEFFFA, 0xA4506CEB, 0xBEF9A3F7, 0xC67178F2,
};


/********************************* Function ************************************/
void utils_sha256_init(uni_sha256_s *tex)
{
    memset(tex, 0, sizeof(uni_sha256_s));
}

void utils_sha256_starts(uni_sha256_s *tex)
{
    int is224 = 0;
    tex->total[0] = 0;
    tex->total[1] = 0;

    if (is224 == 0) {
        tex->state[0] = 0x6A09E667;
        tex->state[1] = 0xBB67AE85;
        tex->state[2] = 0x3C6EF372;
        tex->state[3] = 0xA54FF53A;
        tex->state[4] = 0x510E527F;
        tex->state[5] = 0x9B05688C;
        tex->state[6] = 0x1F83D9AB;
        tex->state[7] = 0x5BE0CD19;
    }

    tex->type = is224;
}

void utils_sha256_process(uni_sha256_s *tex, const unsigned char data[64])
{
    unsigned int i;
    uint32_t B[8],M[64];
	uint32_t tep,tep1;

    for (i = 0; i < 8; i++) {
        B[i] = tex->state[i];
    }

    for (i = 0; i < 64; i++) {
        if (i < 16) {
            GET_UINT32_BE(M[i], data, 4 * i);
        } else {
            R(i);
        }

        P(B[0], B[1], B[2], B[3], B[4], B[5], B[6], B[7], M[i], K[i]);

        tep = B[7];
        B[7] = B[6];
        B[6] = B[5];
        B[5] = B[4];
        B[4] = B[3];
        B[3] = B[2];
        B[2] = B[1];
        B[1] = B[0];
        B[0] = tep;
    }
	
    for (i = 0; i < 8; i++) {
        tex->state[i] += B[i];
    }
}

void utils_sha256_update(uni_sha256_s *tex, const unsigned char *in, uint32_t in_len)
{
    uint32_t left;
    size_t cov;

    if (in_len == 0) {
        return;
    }

    left = tex->total[0] & 0x3F;
    cov = 64 - left;

    tex->total[0] += (uint32_t) in_len;
    tex->total[0] &= 0xFFFFFFFF;

    if (tex->total[0] < (uint32_t) in_len) {
        tex->total[1]++;
    }

    if (left && in_len >= cov) {
        memcpy((void *)(tex->buffer + left), in, cov);
        utils_sha256_process(tex, tex->buffer);
        in += cov;
        in_len  -= cov;
        left = 0;
    }

    while (in_len >= 64) {
        utils_sha256_process(tex, in);
        in += 64;
        in_len  -= 64;
    }

    if (in_len > 0) {
        memcpy((void *)(tex->buffer + left), in, in_len);
    }
}

static const unsigned char sha256_filling[64] = {
    0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};

void utils_sha256_finish(uni_sha256_s *tex, uint8_t out[32])
{
    uint32_t last, padn;
    uint32_t high, low;
    unsigned char msglen[8];

    high = (tex->total[0] >> 29)
           | (tex->total[1] <<  3);
    low  = (tex->total[0] <<  3);

    PUT_UINT32_BE(high, msglen, 0);
    PUT_UINT32_BE(low,  msglen, 4);

    last = tex->total[0] & 0x3F;
    padn = (last < 56) ? (56 - last) : (120 - last);

    utils_sha256_update(tex, sha256_filling, padn);
    utils_sha256_update(tex, msglen, 8);

    PUT_UINT32_BE(tex->state[0], out,  0);
    PUT_UINT32_BE(tex->state[1], out,  4);
    PUT_UINT32_BE(tex->state[2], out,  8);
    PUT_UINT32_BE(tex->state[3], out, 12);
    PUT_UINT32_BE(tex->state[4], out, 16);
    PUT_UINT32_BE(tex->state[5], out, 20);
    PUT_UINT32_BE(tex->state[6], out, 24);

    if (tex->type == 0) {
        PUT_UINT32_BE(tex->state[7], out, 28);
    }
}