SHA-256的实现

#include "SHA256.h"#include <stdio.h>#include <stdlib.h>#include <Windows.h>#define SHA256_ROTL(a,b) (((a>>(32-b))&(0x7fffffff>>(31-b)))|(a<<b))#define SHA256_SR(a,b) ((a>>b)&(0x7fffffff>>(b-1)))#define SHA256_Ch(x,y,z) ((x&y)^((~x)&z))#define SHA256_Maj(x,y,z) ((x&y)^(x&z)^(y&z))#define SHA256_E0(x) (SHA256_ROTL(x,30)^SHA256_ROTL(x,19)^SHA256_ROTL(x,10))#define SHA256_E1(x) (SHA256_ROTL(x,26)^SHA256_ROTL(x,21)^SHA256_ROTL(x,7))#define SHA256_O0(x) (SHA256_ROTL(x,25)^SHA256_ROTL(x,14)^SHA256_SR(x,3))#define SHA256_O1(x) (SHA256_ROTL(x,15)^SHA256_ROTL(x,13)^SHA256_SR(x,10))//计算字符串SHA-256//lpText:   字符串指针//ulSize:字符串长度//szSha256:用于保存SHA256字符串结果的数组指针,一定要大于64void TextSHA256(const char* lpText, unsigned long ulSize, char* szSha256){char *pp, *ppend;long l, i, W[64], T1, T2, A, B, C, D, E, F, G, H, H0, H1, H2, H3, H4, H5, H6, H7;H0 = 0x6a09e667, H1 = 0xbb67ae85, H2 = 0x3c6ef372, H3 = 0xa54ff53a;H4 = 0x510e527f, H5 = 0x9b05688c, H6 = 0x1f83d9ab, H7 = 0x5be0cd19;long 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,};l = ulSize + ((ulSize % 64 >= 56) ? (128 - ulSize % 64) : (64 - ulSize % 64));if (!(pp = (char*)malloc((unsigned long)l))) {return;}for (i = 0; i < ulSize; pp[i + 3 - 2 * (i % 4)] = lpText[i], i++);for (pp[i + 3 - 2 * (i % 4)] = 128, i++; i < l; pp[i + 3 - 2 * (i % 4)] = 0, i++);*((long*)(pp + l - 4)) = ulSize << 3;*((long*)(pp + l - 8)) = ulSize >> 29;for (ppend = pp + l; pp < ppend; pp += 64){for (i = 0; i < 16; W[i] = ((long*)pp)[i], i++);for (i = 16; i < 64; W[i] = (SHA256_O1(W[i - 2]) + W[i - 7] + SHA256_O0(W[i - 15]) + W[i - 16]), i++);A = H0, B = H1, C = H2, D = H3, E = H4, F = H5, G = H6, H = H7;for (i = 0; i < 64; i++){T1 = H + SHA256_E1(E) + SHA256_Ch(E, F, G) + K[i] + W[i];T2 = SHA256_E0(A) + SHA256_Maj(A, B, C);H = G, G = F, F = E, E = D + T1, D = C, C = B, B = A, A = T1 + T2;}H0 += A, H1 += B, H2 += C, H3 += D, H4 += E, H5 += F, H6 += G, H7 += H;}free(pp - l);//默认计算结果是大写形式，如需小写，将函数中末尾处所有 %08X 替换为 %08x 即可sprintf(szSha256, "%08X%08X%08X%08X%08X%08X%08X%08X", H0, H1, H2, H3, H4, H5, H6, H7);}//计算文件SHA256//lpText:   文件全路径//szSha256:用于保存SHA256字符串结果的数组指针,一定要大于64void FileSHA256(const char* lpFile, char* szSha256){if (INVALID_FILE_ATTRIBUTES == GetFileAttributes(lpFile)){return;}FILE* fh;char* addlp, T[64];long addlsize, j, W[64], T1, T2, A, B, C, D, E, F, G, H, H0, H1, H2, H3, H4, H5, H6, H7;long long length, i, cpys;void *pp, *ppend;H0 = 0x6a09e667, H1 = 0xbb67ae85, H2 = 0x3c6ef372, H3 = 0xa54ff53a;H4 = 0x510e527f, H5 = 0x9b05688c, H6 = 0x1f83d9ab, H7 = 0x5be0cd19;long 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,};fh = fopen(lpFile, "rb");fseek(fh, 0, SEEK_END);length = _ftelli64(fh);addlsize = (56 - length % 64 > 0) ? (64) : (128);if (!(addlp = (char*)malloc(addlsize))) {return;}cpys = ((length - (56 - length % 64)) > 0) ? (length - length % 64) : (0);j = (long)(length - cpys);if (!(pp = (char*)malloc(j))) {return;}fseek(fh, -j, SEEK_END);fread(pp, 1, j, fh);for (i = 0; i < j; addlp[i + 3 - 2 * (i % 4)] = ((char*)pp)[i], i++);free(pp);for (addlp[i + 3 - 2 * (i % 4)] = 128, i++; i < addlsize; addlp[i + 3 - 2 * (i % 4)] = 0, i++);*((long*)(addlp + addlsize - 4)) = length << 3;*((long*)(addlp + addlsize - 8)) = length >> 29;for (rewind(fh); 64 == fread(W, 1, 64, fh);){for (i = 0; i < 64; T[i + 3 - 2 * (i % 4)] = ((char*)W)[i], i++);for (i = 0; i < 16; W[i] = ((long*)T)[i], i++);for (i = 16; i < 64; W[i] = (SHA256_O1(W[i - 2]) + W[i - 7] + SHA256_O0(W[i - 15]) + W[i - 16]), i++);A = H0, B = H1, C = H2, D = H3, E = H4, F = H5, G = H6, H = H7;for (i = 0; i < 64; i++){T1 = H + SHA256_E1(E) + SHA256_Ch(E, F, G) + K[i] + W[i];T2 = SHA256_E0(A) + SHA256_Maj(A, B, C);H = G, G = F, F = E, E = D + T1, D = C, C = B, B = A, A = T1 + T2;}H0 += A, H1 += B, H2 += C, H3 += D, H4 += E, H5 += F, H6 += G, H7 += H;}for (pp = addlp, ppend = addlp + addlsize; pp < ppend; pp = (long*)pp + 16){for (i = 0; i < 16; W[i] = ((long*)pp)[i], i++);for (i = 16; i < 64; W[i] = (SHA256_O1(W[i - 2]) + W[i - 7] + SHA256_O0(W[i - 15]) + W[i - 16]), i++);A = H0, B = H1, C = H2, D = H3, E = H4, F = H5, G = H6, H = H7;for (i = 0; i < 64; i++){T1 = H + SHA256_E1(E) + SHA256_Ch(E, F, G) + K[i] + W[i];T2 = SHA256_E0(A) + SHA256_Maj(A, B, C);H = G, G = F, F = E, E = D + T1, D = C, C = B, B = A, A = T1 + T2;}H0 += A, H1 += B, H2 += C, H3 += D, H4 += E, H5 += F, H6 += G, H7 += H;}free(addlp); fclose(fh);//默认计算结果是大写形式，如需小写，将函数中末尾处所有 %08X 替换为 %08x 即可sprintf(szSha256, "%08X%08X%08X%08X%08X%08X%08X%08X", H0, H1, H2, H3, H4, H5, H6, H7);}