266 lines
8.1 KiB
C
266 lines
8.1 KiB
C
#include "stdio.h"
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#include "stdlib.h"
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#include "string.h"
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#include "stdint.h"
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/*******************************************************************/
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/* SHA256 */
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/*******************************************************************/
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#define SHA256_BLOCK_SIZE 32
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typedef unsigned char BYTE;
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typedef unsigned int WORD;
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typedef struct {
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BYTE ctxdata[64];
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WORD datalen;
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unsigned long long bitlen;
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WORD state[8];
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} SHA256_CTX;
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void SHA256_Init(SHA256_CTX *ctx);
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void SHA256_Update(SHA256_CTX *ctx, const BYTE data[], WORD len);
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void SHA256_Final(SHA256_CTX *ctx, BYTE hash[]);
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#define ROTLEFT(a,b) (((a) << (b)) | ((a) >> (32-(b))))
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#define ROTRIGHT(a,b) (((a) >> (b)) | ((a) << (32-(b))))
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#define CH(x,y,z) (((x) & (y)) ^ (~(x) & (z)))
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#define MAJ(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
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#define EP0(x) (ROTRIGHT(x,2) ^ ROTRIGHT(x,13) ^ ROTRIGHT(x,22))
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#define EP1(x) (ROTRIGHT(x,6) ^ ROTRIGHT(x,11) ^ ROTRIGHT(x,25))
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#define SIG0(x) (ROTRIGHT(x,7) ^ ROTRIGHT(x,18) ^ ((x) >> 3))
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#define SIG1(x) (ROTRIGHT(x,17) ^ ROTRIGHT(x,19) ^ ((x) >> 10))
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static const unsigned int k[64] = {
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0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5,0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5,
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0xd807aa98,0x12835b01,0x243185be,0x550c7dc3,0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174,
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0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc,0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da,
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0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7,0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967,
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0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13,0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85,
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0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3,0xd192e819,0xd6990624,0xf40e3585,0x106aa070,
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0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5,0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3,
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0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208,0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2
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};
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void sha256_transform(SHA256_CTX *ctx, const BYTE databuf[])
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{
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unsigned int a, b, c, d, e, f, g, h, i, j, t1, t2, m[64];
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for (i = 0, j = 0; i < 16; ++i, j += 4)
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m[i] = (databuf[j] << 24) | (databuf[j + 1] << 16) | (databuf[j + 2] << 8) | (databuf[j + 3]);
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for ( ; i < 64; ++i)
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m[i] = SIG1(m[i - 2]) + m[i - 7] + SIG0(m[i - 15]) + m[i - 16];
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a = ctx->state[0];
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b = ctx->state[1];
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c = ctx->state[2];
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d = ctx->state[3];
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e = ctx->state[4];
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f = ctx->state[5];
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g = ctx->state[6];
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h = ctx->state[7];
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for (i = 0; i < 64; ++i) {
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t1 = h + EP1(e) + CH(e,f,g) + k[i] + m[i];
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t2 = EP0(a) + MAJ(a,b,c);
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h = g;
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g = f;
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f = e;
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e = d + t1;
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d = c;
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c = b;
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b = a;
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a = t1 + t2;
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}
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ctx->state[0] += a;
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ctx->state[1] += b;
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ctx->state[2] += c;
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ctx->state[3] += d;
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ctx->state[4] += e;
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ctx->state[5] += f;
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ctx->state[6] += g;
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ctx->state[7] += h;
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}
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void SHA256_Init(SHA256_CTX *ctx)
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{
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ctx->datalen = 0;
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ctx->bitlen = 0;
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ctx->state[0] = 0x6a09e667;
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ctx->state[1] = 0xbb67ae85;
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ctx->state[2] = 0x3c6ef372;
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ctx->state[3] = 0xa54ff53a;
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ctx->state[4] = 0x510e527f;
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ctx->state[5] = 0x9b05688c;
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ctx->state[6] = 0x1f83d9ab;
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ctx->state[7] = 0x5be0cd19;
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}
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void SHA256_Update(SHA256_CTX *ctx, const BYTE databuf[], WORD len)
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{
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unsigned int i;
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for (i = 0; i < len; ++i) {
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ctx->ctxdata[ctx->datalen] = databuf[i];
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ctx->datalen++;
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if (ctx->datalen == 64) {
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sha256_transform(ctx, ctx->ctxdata);
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ctx->bitlen += 512;
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ctx->datalen = 0;
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}
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}
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}
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void SHA256_Final(SHA256_CTX *ctx, BYTE hash[])
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{
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unsigned int i;
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int j;
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i = ctx->datalen;
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if (ctx->datalen < 56) {
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ctx->ctxdata[i++] = 0x80; // pad 10000000 = 0x80
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while (i < 56)
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ctx->ctxdata[i++] = 0x00;
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}
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else {
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ctx->ctxdata[i++] = 0x80;
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while (i < 64)
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ctx->ctxdata[i++] = 0x00;
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sha256_transform(ctx, ctx->ctxdata);
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memset(ctx->ctxdata, 0, 56);
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}
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ctx->bitlen += ctx->datalen * 8;
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ctx->ctxdata[63] = ctx->bitlen;
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ctx->ctxdata[62] = ctx->bitlen >> 8;
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ctx->ctxdata[61] = ctx->bitlen >> 16;
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ctx->ctxdata[60] = ctx->bitlen >> 24;
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ctx->ctxdata[59] = ctx->bitlen >> 32;
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ctx->ctxdata[58] = ctx->bitlen >> 40;
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ctx->ctxdata[57] = ctx->bitlen >> 48;
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ctx->ctxdata[56] = ctx->bitlen >> 56;
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sha256_transform(ctx, ctx->ctxdata);
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for (i = 0; i < 4; ++i) {
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hash[i] = (ctx->state[0] >> (24 - i * 8)) & 0x000000ff;
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hash[i + 4] = (ctx->state[1] >> (24 - i * 8)) & 0x000000ff;
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hash[i + 8] = (ctx->state[2] >> (24 - i * 8)) & 0x000000ff;
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hash[i + 12] = (ctx->state[3] >> (24 - i * 8)) & 0x000000ff;
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hash[i + 16] = (ctx->state[4] >> (24 - i * 8)) & 0x000000ff;
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hash[i + 20] = (ctx->state[5] >> (24 - i * 8)) & 0x000000ff;
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hash[i + 24] = (ctx->state[6] >> (24 - i * 8)) & 0x000000ff;
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hash[i + 28] = (ctx->state[7] >> (24 - i * 8)) & 0x000000ff;
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}
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}
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/******************************************************************************
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* Name: CRC-32 x32+x26+x23+x22+x16+x12+x11+x10+x8+x7+x5+x4+x2+x+1
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* Poly: 0x4C11DB7
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* Init: 0xFFFFFFF
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* Refin: True
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* Refout: True
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* Xorout: 0xFFFFFFF
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* Alias: CRC_32/ADCCP
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* Use: WinRAR,ect.
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*****************************************************************************/
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uint32_t bflb_soft_crc32_ex(uint32_t initial, void *in, uint32_t len)
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{
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uint8_t i;
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uint32_t crc = ~initial; // Initial value
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uint8_t *data = (uint8_t *)in;
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while (len--) {
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crc ^= *data++; // crc ^= *data; data++;
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for (i = 0; i < 8; ++i) {
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if (crc & 1) {
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crc = (crc >> 1) ^ 0xEDB88320; // 0xEDB88320= reverse 0x04C11DB7
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} else {
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crc = (crc >> 1);
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}
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}
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}
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return ~crc;
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}
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#define PEC_HEAD (4 * 1024)
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#define PEC_MAX (1024 * 1024)
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uint8_t pec[PEC_MAX];
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uint32_t pec_length;
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uint32_t crc;
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void main(int argc, char *argv[])
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{
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BYTE sha_buf[SHA256_BLOCK_SIZE];
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SHA256_CTX ctx;
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if (argc != 3) {
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printf("Usage: %s <input file> <output file>\r\n", argv[0]);
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return;
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}
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/* read input file */
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FILE *file = fopen(argv[1], "rb");
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if (file == NULL) {
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printf("Error opening file %s\r\n", argv[1]);
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return;
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}
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fseek(file, 0, SEEK_END);
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pec_length = ftell(file);
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rewind(file);
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printf("input file \"%s\" length is %d bytes\r\n", argv[1], pec_length);
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if (pec_length <= 4 * 1024) {
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printf("input file \"%s\" is too small, must more than 4K bytes\r\n", argv[1]);
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fclose(file);
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return;
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}
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if (pec_length > PEC_MAX) {
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printf("input file \"%s\" is too big, must not more than %d bytes\r\n", argv[1], PEC_MAX);
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fclose(file);
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return;
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}
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memset(pec, 0, sizeof(pec));
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if (pec_length != fread(pec, 1, pec_length, file)) {
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printf("read input file \"%s\" error\r\n", argv[1]);
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fclose(file);
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return;
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}
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fclose(file);
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/* complement file with 0 to 1Kbyte aligned */
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pec_length = (pec_length + 1023) & (~0x3FF);
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printf("after aligned, input file \"%s\" length is %d bytes\r\n", argv[1], pec_length);
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*(uint32_t *)(&(pec[PEC_HEAD - 4 - SHA256_BLOCK_SIZE - 4])) = pec_length - PEC_HEAD;
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/* calculate sha256sum */
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SHA256_Init(&ctx);
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SHA256_Update(&ctx, pec + PEC_HEAD, pec_length - PEC_HEAD);
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SHA256_Final(&ctx, sha_buf);
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printf("sha256sum: ");
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for (uint32_t i = 0; i < SHA256_BLOCK_SIZE; i++) {
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printf("%02x", sha_buf[i]);
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pec[PEC_HEAD - 4 - SHA256_BLOCK_SIZE + i] = sha_buf[i];
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}
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printf("\r\n");
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/* calculate CRC32 */
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crc = bflb_soft_crc32_ex(0, pec, PEC_HEAD - 4);
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printf("CRC32: 0x%08X\r\n", crc);
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*(uint32_t *)(&(pec[PEC_HEAD - 4])) = crc;
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/* write output file */
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file = fopen(argv[2], "wb");
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if (file == NULL) {
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printf("Error opening file %s\r\n", argv[2]);
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return;
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}
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if (pec_length != fwrite(pec, 1, pec_length, file)) {
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printf("write output file \"%s\" error\r\n", argv[2]);
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fclose(file);
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return;
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}
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fclose(file);
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printf("release pec binary succeed!\r\n");
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}
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