diff --git a/linux/pec/pec_magic.c b/linux/pec/pec_magic.c
new file mode 100644
index 0000000..b2a6e91
--- /dev/null
+++ b/linux/pec/pec_magic.c
@@ -0,0 +1,265 @@
+#include "stdio.h"
+#include "stdlib.h"
+#include "string.h"
+#include "stdint.h"
+
+/*******************************************************************/
+/* SHA256 */
+/*******************************************************************/
+#define SHA256_BLOCK_SIZE 32
+
+typedef unsigned char BYTE;
+typedef unsigned int WORD;
+
+typedef struct {
+ BYTE ctxdata[64];
+ WORD datalen;
+ unsigned long long bitlen;
+ WORD state[8];
+} SHA256_CTX;
+
+void SHA256_Init(SHA256_CTX *ctx);
+void SHA256_Update(SHA256_CTX *ctx, const BYTE data[], WORD len);
+void SHA256_Final(SHA256_CTX *ctx, BYTE hash[]);
+
+#define ROTLEFT(a,b) (((a) << (b)) | ((a) >> (32-(b))))
+#define ROTRIGHT(a,b) (((a) >> (b)) | ((a) << (32-(b))))
+
+#define CH(x,y,z) (((x) & (y)) ^ (~(x) & (z)))
+#define MAJ(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
+#define EP0(x) (ROTRIGHT(x,2) ^ ROTRIGHT(x,13) ^ ROTRIGHT(x,22))
+#define EP1(x) (ROTRIGHT(x,6) ^ ROTRIGHT(x,11) ^ ROTRIGHT(x,25))
+#define SIG0(x) (ROTRIGHT(x,7) ^ ROTRIGHT(x,18) ^ ((x) >> 3))
+#define SIG1(x) (ROTRIGHT(x,17) ^ ROTRIGHT(x,19) ^ ((x) >> 10))
+
+static const unsigned int 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
+};
+
+void sha256_transform(SHA256_CTX *ctx, const BYTE databuf[])
+{
+ unsigned int a, b, c, d, e, f, g, h, i, j, t1, t2, m[64];
+
+ for (i = 0, j = 0; i < 16; ++i, j += 4)
+ m[i] = (databuf[j] << 24) | (databuf[j + 1] << 16) | (databuf[j + 2] << 8) | (databuf[j + 3]);
+ for ( ; i < 64; ++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 < 64; ++i) {
+ t1 = h + EP1(e) + CH(e,f,g) + k[i] + m[i];
+ t2 = EP0(a) + MAJ(a,b,c);
+ h = g;
+ g = f;
+ f = e;
+ e = d + t1;
+ d = c;
+ c = b;
+ b = a;
+ a = t1 + t2;
+ }
+
+ ctx->state[0] += a;
+ ctx->state[1] += b;
+ ctx->state[2] += c;
+ ctx->state[3] += d;
+ ctx->state[4] += e;
+ ctx->state[5] += f;
+ ctx->state[6] += g;
+ ctx->state[7] += h;
+}
+
+void SHA256_Init(SHA256_CTX *ctx)
+{
+ ctx->datalen = 0;
+ ctx->bitlen = 0;
+ ctx->state[0] = 0x6a09e667;
+ ctx->state[1] = 0xbb67ae85;
+ ctx->state[2] = 0x3c6ef372;
+ ctx->state[3] = 0xa54ff53a;
+ ctx->state[4] = 0x510e527f;
+ ctx->state[5] = 0x9b05688c;
+ ctx->state[6] = 0x1f83d9ab;
+ ctx->state[7] = 0x5be0cd19;
+}
+
+void SHA256_Update(SHA256_CTX *ctx, const BYTE databuf[], WORD len)
+{
+ unsigned int i;
+
+ for (i = 0; i < len; ++i) {
+ ctx->ctxdata[ctx->datalen] = databuf[i];
+ ctx->datalen++;
+ if (ctx->datalen == 64) {
+ sha256_transform(ctx, ctx->ctxdata);
+ ctx->bitlen += 512;
+ ctx->datalen = 0;
+ }
+ }
+}
+
+void SHA256_Final(SHA256_CTX *ctx, BYTE hash[])
+{
+ unsigned int i;
+ int j;
+ i = ctx->datalen;
+
+ if (ctx->datalen < 56) {
+ ctx->ctxdata[i++] = 0x80; // pad 10000000 = 0x80
+ while (i < 56)
+ ctx->ctxdata[i++] = 0x00;
+ }
+ else {
+ ctx->ctxdata[i++] = 0x80;
+ while (i < 64)
+ ctx->ctxdata[i++] = 0x00;
+ sha256_transform(ctx, ctx->ctxdata);
+ memset(ctx->ctxdata, 0, 56);
+ }
+
+ ctx->bitlen += ctx->datalen * 8;
+ ctx->ctxdata[63] = ctx->bitlen;
+ ctx->ctxdata[62] = ctx->bitlen >> 8;
+ ctx->ctxdata[61] = ctx->bitlen >> 16;
+ ctx->ctxdata[60] = ctx->bitlen >> 24;
+ ctx->ctxdata[59] = ctx->bitlen >> 32;
+ ctx->ctxdata[58] = ctx->bitlen >> 40;
+ ctx->ctxdata[57] = ctx->bitlen >> 48;
+ ctx->ctxdata[56] = ctx->bitlen >> 56;
+ sha256_transform(ctx, ctx->ctxdata);
+
+ for (i = 0; i < 4; ++i) {
+ hash[i] = (ctx->state[0] >> (24 - i * 8)) & 0x000000ff;
+ hash[i + 4] = (ctx->state[1] >> (24 - i * 8)) & 0x000000ff;
+ hash[i + 8] = (ctx->state[2] >> (24 - i * 8)) & 0x000000ff;
+ hash[i + 12] = (ctx->state[3] >> (24 - i * 8)) & 0x000000ff;
+ hash[i + 16] = (ctx->state[4] >> (24 - i * 8)) & 0x000000ff;
+ hash[i + 20] = (ctx->state[5] >> (24 - i * 8)) & 0x000000ff;
+ hash[i + 24] = (ctx->state[6] >> (24 - i * 8)) & 0x000000ff;
+ hash[i + 28] = (ctx->state[7] >> (24 - i * 8)) & 0x000000ff;
+ }
+}
+
+/******************************************************************************
+* Name: CRC-32 x32+x26+x23+x22+x16+x12+x11+x10+x8+x7+x5+x4+x2+x+1
+* Poly: 0x4C11DB7
+* Init: 0xFFFFFFF
+* Refin: True
+* Refout: True
+* Xorout: 0xFFFFFFF
+* Alias: CRC_32/ADCCP
+* Use: WinRAR,ect.
+*****************************************************************************/
+uint32_t bflb_soft_crc32_ex(uint32_t initial, void *in, uint32_t len)
+{
+ uint8_t i;
+ uint32_t crc = ~initial; // Initial value
+ uint8_t *data = (uint8_t *)in;
+
+ while (len--) {
+ crc ^= *data++; // crc ^= *data; data++;
+ for (i = 0; i < 8; ++i) {
+ if (crc & 1) {
+ crc = (crc >> 1) ^ 0xEDB88320; // 0xEDB88320= reverse 0x04C11DB7
+ } else {
+ crc = (crc >> 1);
+ }
+ }
+ }
+ return ~crc;
+}
+
+#define PEC_HEAD (4 * 1024)
+#define PEC_MAX (1024 * 1024)
+uint8_t pec[PEC_MAX];
+uint32_t pec_length;
+uint32_t crc;
+
+void main(int argc, char *argv[])
+{
+ BYTE sha_buf[SHA256_BLOCK_SIZE];
+ SHA256_CTX ctx;
+
+ if (argc != 3) {
+ printf("Usage: %s