#include <linux/init.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/videodev2.h>
#include <linux/clk.h>
#include <linux/slab.h>
#include <linux/io.h>
#include "sha256.h"
#define ATSHA204_DEBUG_EN 1
#if(ATSHA204_DEBUG_EN == 1)
#define atsh204_dbg(x,arg...) printk("[ATSHA204]"x,##arg)
#define atsh204_err(x,arg...) printk("[ATSHA204]"x,##arg)
#define atsh204_print(x,arg...) printk("[ATSHA204]"x,##arg)
#else
#define atsh204_dbg(x,arg...)
#define atsh204_err(x,arg...)
#define atsh204_print(x,arg...)
#endif
#define ATSHA204_I2C_ADDR 0xc8
#define ATSHA204_NAME "atsha204"
#define SHA204_SUCCESS 1
#define SHA204_BAD_CRC -1
#define WRITE_CFG_SUCCESS 8
#define WRITE_OTP_SUCCESS 7
#define WRITE_DATA_SUCCESS 6
/*word address use to different function*/
#define RESET_ADDRESS 0x00
#define SLEEP_ADDRESS 0x01
#define IDLE_ADDRESS 0x02
#define COMMAND_ADDRESS 0x03
#define ATSHA204_READ_COMMAND 0x02
#define ATSHA204_WRITE_COMMAND 0x12
#define ATSHA204_LOCK_COMMAND 0x17
#define ATSHA204_NONCE_COMMAND 0x16
#define ATSHA204_MAC_COMMAND 0x08
#define ATSHA204_CHECKMAC_COMMAND 0x28
#define SHFR(x, n) (x >> n)
#define ROTR(x, n) ((x >> n) | (x << ((sizeof(x) << 3) - n)))
#define ROTL(x, n) ((x << n) | (x >> ((sizeof(x) << 3) - n)))
#define CH(x, y, z) ((x & y) ^ (~x & z))
#define MAJ(x, y, z) ((x & y) ^ (x & z) ^ (y & z))
#define SHA256_F1(x) (ROTR(x, 2) ^ ROTR(x, 13) ^ ROTR(x, 22))
#define SHA256_F2(x) (ROTR(x, 6) ^ ROTR(x, 11) ^ ROTR(x, 25))
#define SHA256_F3(x) (ROTR(x, 7) ^ ROTR(x, 18) ^ SHFR(x, 3))
#define SHA256_F4(x) (ROTR(x, 17) ^ ROTR(x, 19) ^ SHFR(x, 10))
#define UNPACK32(x, str) \
{ \
*((str) + 3) = (uint8) ((x) ); \
*((str) + 2) = (uint8) ((x) >> 8); \
*((str) + 1) = (uint8) ((x) >> 16); \
*((str) + 0) = (uint8) ((x) >> 24); \
}
#define PACK32(str, x) \
{ \
*(x) = ((uint32) *((str) + 3) ) \
| ((uint32) *((str) + 2) << 8) \
| ((uint32) *((str) + 1) << 16) \
| ((uint32) *((str) + 0) << 24); \
}
/* Macros used for loops unrolling */
#define SHA256_SCR(i) \
{ \
w[i] = SHA256_F4(w[i - 2]) + w[i - 7] \
+ SHA256_F3(w[i - 15]) + w[i - 16]; \
}
#define SHA256_EXP(a, b, c, d, e, f, g, h, j) \
{ \
t1 = wv[h] + SHA256_F2(wv[e]) + CH(wv[e], wv[f], wv[g]) \
+ sha256_k[j] + w[j]; \
t2 = SHA256_F1(wv[a]) + MAJ(wv[a], wv[b], wv[c]); \
wv[d] += t1; \
wv[h] = t1 + t2; \
}
typedef enum
{
CONFIG_ZONE_BIT=0,//config zone
OTP_ZONE_BIT, // otp zone
DATA_ZONE_BIT, //data zone
}DIFF_ZONE;
static __u32 twi_id = 1;
static __u32 iic_addr = 0x64;
static int READ32_MODE = 1;
static int READ4_MODE = 0;
struct atsha204_st {
struct i2c_client *client;
u8 device_id;
};
static const struct i2c_device_id atsha204_id[] = {
{ATSHA204_NAME, 0},
{}
};
/************************************************************************************/
uint32 sha256_h0[8] =
{0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a,
0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19};
//flash uint32 sha256_k[64] =
uint32 sha256_k[64] =
{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};
/* SHA-256 functions */
// some helper macros for TPM implementation
//#define zram32 ((UINT32*) zram)
//#define eob32(buf) ((sizeof(buf)/sizeof(UINT32)))
void sha256_transf(sha256_ctx *ctx, const uint8 *message,
uint32 block_nb)
{
uint32 w[64];
uint32 wv[8];
// uint32 *wv = &zram32[eob32(zram)-8];
// uint32 *w = &zram32[eob32(zram)-(8+64)];
uint32 t1, t2;
const uint8 *sub_block;
int i;
#ifndef UNROLL_LOOPS
int j;
#endif
for (i = 0; i < (int) block_nb; i++) {
sub_block = message + (i << 6);
#ifndef UNROLL_LOOPS
for (j = 0; j < 16; j++) {
PACK32(&sub_block[j << 2], &w[j]);
}
for (j = 16; j < 64; j++) {
SHA256_SCR(j);
}
for (j = 0; j < 8; j++) {
wv[j] = ctx->h[j];
}
for (j = 0; j < 64; j++) {
t1 = wv[7] + SHA256_F2(wv[4]) + CH(wv[4], wv[5], wv[6])
+ sha256_k[j] + w[j];
t2 = SHA256_F1(wv[0]) + MAJ(wv[0], wv[1], wv[2]);
wv[7] = wv[6];
wv[6] = wv[5];
wv[5] = wv[4];
wv[4] = wv[3] + t1;
wv[3] = wv[2];
wv[2] = wv[1];
wv[1] = wv[0];
wv[0] = t1 + t2;
}
for (j = 0; j < 8; j++) {
ctx->h[j] += wv[j];
}
#else
PACK32(&sub_block[ 0], &w[ 0]); PACK32(&sub_block[ 4], &w[ 1]);
PACK32(&sub_block[ 8], &w[ 2]); PACK32(&sub_block[12], &w[ 3]);
PACK32(&sub_block[16], &w[ 4]); PACK32(&sub_block[20], &w[ 5]);
PACK32(&sub_block[24], &w[ 6]); PACK32(&sub_block[28], &w[ 7]);
PACK32(&sub_block[32], &w[ 8]); PACK32(&sub_block[36], &w[ 9]);
PACK32(&sub_block[40], &w[10]); PACK32(&sub_block[44], &w[11]);
PACK32(&sub_block[48], &w[12]); PACK32(&sub_block[52], &w[13]);
PACK32(&sub_block[56], &w[14]); PACK32(&sub_block[60], &w[15]);
SHA256_SCR(16); SHA256_SCR(17); SHA256_SCR(18); SHA256_SCR(19);
SHA256_SCR(20); SHA256_SCR(21); SHA256_SCR(22); SHA256_SCR(23);
SHA256_SCR(24); SHA256_SCR(25); SHA256_SCR(26); SHA256_SCR(27);
SHA256_SCR(28); SHA256_SCR(29); SHA256_SCR(30); SHA256_SCR(31);
SHA256_SCR(32); SHA256_SCR(33); SHA256_SCR(34); SHA256_SCR(35);
SHA256_SCR(36); SHA256_SCR(37); SHA256_SCR(38); SHA256_SCR(39);
SHA256_SCR(40); SHA256_SCR(41); SHA256_SCR(42); SHA256_SCR(43);
SHA256_SCR(44); SHA256_SCR(45); SHA256_SCR(46); SHA256_SCR(47);
SHA256_SCR(48); SHA256_SCR(49); SHA256_SCR(50); SHA256_SCR(51);
SHA256_SCR(52); SHA256_SCR(53); SHA256_SCR(54); SHA256_SCR(55);
SHA256_SCR(56); SHA256_SCR(57); SHA256_SCR(58); SHA256_SCR(59);
SHA256_SCR(60); SHA256_SCR(61); SHA256_SCR(62); SHA256_SCR(63);
wv[0] = ctx->h[0]; wv[1] = ctx->h[1];
wv[2] = ctx->h[2]; wv[3] = ctx->h[3];
wv[4] = ctx->h[4]; wv[5] = ctx->h[5];
wv[6] = ctx->h[6]; wv[7] = ctx->h[7];
SHA256_EXP(0,1,2,3,4,5,6,7, 0); SHA256_EXP(7,0,1,2,3,4,5,6, 1);
SHA256_EXP(6,7,0,1,2,3,4,5, 2); SHA256_EXP(5,6,7,0,1,2,3,4, 3);
SHA256_EXP(4,5,6,7,0,1,2,3, 4); SHA256_EXP(3,4,5,6,7,0,1,2, 5);
SHA256_EXP(2,3,4,5,6,7,0,1, 6); SHA256_EXP(1,2,3,4,5,6,7,0, 7);
SHA256_EXP(0,1,2,3,4,5,6,7, 8); SHA256_EXP(7,0,1,2,3,4,5,6, 9);
SHA256_EXP(6,7,0,1,2,3,4,5,10); SHA256_EXP(5,6,7,0,1,2,3,4,11);
SHA256_EXP(4,5,6,7,0
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