找不到这个6598f2c的提交怎么办，并且我不知道完整的commit-SHA

对于找不到提交 "6598f2c" 的问题，你可以尝试以下几种方法：

1. 使用 Git 历史记录查找：你可以使用以下命令查看 Git 仓库的历史记录，以尝试找到包含 "6598f2c" 的提交：

   git log

这将显示提交的完整列表，包括每个提交的 SHA 和相关信息。你可以按下 `/` 键进入搜索模式，然后输入 "6598f2c" 进行搜索。如果找到相应的提交，你将看到完整的提交 SHA 和相关信息。

2. 使用模糊搜索：如果你不知道完整的提交 SHA，你可以尝试使用模糊搜索来查找相关提交。使用以下命令：

   git log --grep=<commit-message>

将 `<commit-message>` 替换为你认为可能与提交相关的信息，如提交消息、作者名称等。这将显示包含指定信息的提交列表。

3. 使用 Git 图形界面工具：如果你对命令行不熟悉，你可以使用 Git 图形界面工具，如 Git GUI、GitKraken 等。这些工具通常提供更直观的界面，帮助你浏览和搜索提交。

如果以上方法仍然无法找到提交 "6598f2c"，可能是因为该提交不存在于当前克隆的仓库中或已被删除。如果你知道该提交存在于其他分支、远程仓库或历史记录中，你可以尝试切换到相应的分支或克隆完整的远程仓库进行查找。

相关问题

用C语言写一个SHA-512加解密系统

SHA-512是一种安全哈希算法，用于产生消息摘要，不是加解密系统。下面是一个用C语言实现SHA-512算法的示例代码：

#include <stdio.h>
#include <stdint.h>
#include <string.h>

#define SHA512_BLOCK_SIZE 128
#define SHA512_DIGEST_SIZE 64

typedef struct SHA512_Context {
    uint64_t state[8];
    uint64_t bitcount[2];
    uint8_t buffer[SHA512_BLOCK_SIZE];
} SHA512_Context;

static const uint64_t K[80] = {
    0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL,
    0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL,
    0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
    0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL,
    0xd807aa98a3030242ULL, 0x12835b0145706fbeULL,
    0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
    0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL,
    0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL,
    0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,
    0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL,
    0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL,
    0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
    0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL,
    0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL,
    0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
    0x06ca6351e003826fULL, 0x142929670a0e6e70ULL,
    0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL,
    0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
    0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL,
    0x81c2c92e47edaee6ULL, 0x92722c851482353bULL,
    0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
    0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL,
    0xd192e819d6ef5218ULL, 0xd69906245565a910ULL,
    0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
    0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL,
    0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL,
    0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
    0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL,
    0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL,
    0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
    0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL,
    0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL,
    0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,
    0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL,
    0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL,
    0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
    0x28db77f523047d84ULL, 0x32caab7b40c72493ULL,
    0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL,
    0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
    0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL
};

static const uint8_t padding[SHA512_BLOCK_SIZE] = {
    0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};

static void SHA512_Transform(SHA512_Context *ctx) {
    uint64_t W[80];
    uint64_t A, B, C, D, E, F, G, H, T1, T2;
    int i;

    for (i = 0; i < 16; i++) {
        W[i] = ((uint64_t)ctx->buffer[i * 8 + 0] << 56) |
               ((uint64_t)ctx->buffer[i * 8 + 1] << 48) |
               ((uint64_t)ctx->buffer[i * 8 + 2] << 40) |
               ((uint64_t)ctx->buffer[i * 8 + 3] << 32) |
               ((uint64_t)ctx->buffer[i * 8 + 4] << 24) |
               ((uint64_t)ctx->buffer[i * 8 + 5] << 16) |
               ((uint64_t)ctx->buffer[i * 8 + 6] << 8) |
               ((uint64_t)ctx->buffer[i * 8 + 7] << 0);
    }

    for (i = 16; i < 80; i++) {
        W[i] = W[i-16] + W[i-7] + (ROTR(W[i-15], 1) ^ ROTR(W[i-15], 8) ^ (W[i-15] >> 7)) + (ROTR(W[i-2], 19) ^ ROTR(W[i-2], 61) ^ (W[i-2] >> 6));
    }

    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 < 80; i++) {
        T1 = H + (ROTR(E, 14) ^ ROTR(E, 18) ^ ROTR(E, 41)) + ((E & F) ^ (~E & G)) + K[i] + W[i];
        T2 = (ROTR(A, 28) ^ ROTR(A, 34) ^ ROTR(A, 39)) + ((A & B) ^ (A & C) ^ (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 SHA512_Init(SHA512_Context *ctx) {
    memset(ctx, 0, sizeof(*ctx));
    ctx->state[0] = 0x6a09e667f3bcc908ULL;
    ctx->state[1] = 0xbb67ae8584caa73bULL;
    ctx->state[2] = 0x3c6ef372fe94f82bULL;
    ctx->state[3] = 0xa54ff53a5f1d36f1ULL;
    ctx->state[4] = 0x510e527fade682d1ULL;
    ctx->state[5] = 0x9b05688c2b3e6c1fULL;
    ctx->state[6] = 0x1f83d9abfb41bd6bULL;
    ctx->state[7] = 0x5be0cd19137e2179ULL;
}

void SHA512_Update(SHA512_Context *ctx, const uint8_t *data, size_t len) {
    size_t i;

    for (i = 0; i < len; i++) {
        ctx->buffer[ctx->bitcount[0] % SHA512_BLOCK_SIZE] = data[i];
        ctx->bitcount[0] += 8;
        if (ctx->bitcount[0] == 0) {
            ctx->bitcount[1]++;
        }
        if (ctx->bitcount[0] % SHA512_BLOCK_SIZE == 0) {
            SHA512_Transform(ctx);
        }
    }
}

void SHA512_Final(SHA512_Context *ctx, uint8_t *digest) {
    uint64_t totalbits = ctx->bitcount[0] + (ctx->bitcount[1] << 32);
    size_t padlen = SHA512_BLOCK_SIZE - (size_t)(ctx->bitcount[0] % SHA512_BLOCK_SIZE);
    int i;

    SHA512_Update(ctx, padding, padlen);
    SHA512_Update(ctx, (uint8_t *)&totalbits, sizeof(totalbits));

    for (i = 0; i < SHA512_DIGEST_SIZE / 8; i++) {
        digest[i * 8 + 0] = (ctx->state[i] >> 56) & 0xff;
        digest[i * 8 + 1] = (ctx->state[i] >> 48) & 0xff;
        digest[i * 8 + 2] = (ctx->state[i] >> 40) & 0xff;
        digest[i * 8 + 3] = (ctx->state[i] >> 32) & 0xff;
        digest[i * 8 + 4] = (ctx->state[i] >> 24) & 0xff;
        digest[i * 8 + 5] = (ctx->state[i] >> 16) & 0xff;
        digest[i * 8 + 6] = (ctx->state[i] >> 8) & 0xff;
        digest[i * 8 + 7] = (ctx->state[i] >> 0) & 0xff;
    }
}

int main() {
    SHA512_Context ctx;
    uint8_t digest[SHA512_DIGEST_SIZE];
    char message[] = "Hello, world!";
    size_t len = strlen(message);

    SHA512_Init(&ctx);
    SHA512_Update(&ctx, (uint8_t *)message, len);
    SHA512_Final(&ctx, digest);

    int i;
    for (i = 0; i < SHA512_DIGEST_SIZE; i++) {
        printf("%02x", digest[i]);
    }
    printf("\n");

    return 0;
}

该代码可以计算输入消息的SHA-512哈希值。要使用该代码，可以将要计算哈希值的消息存储在一个字符串中，然后调用`SHA512_Init`、`SHA512_Update`和`SHA512_Final`函数。最终的哈希值将存储在一个64字节的缓冲区中。

用c语言实现基于BS模式的SHA-256算法文件完整性程序

以下是基于BS模式的SHA-256算法文件完整性程序的C语言实现：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>

#define ROTL(x, n) (((x) << (n)) | ((x) >> (32 - (n))))
#define ROTR(x, n) (((x) >> (n)) | ((x) << (32 - (n))))
#define SHR(x, n) ((x) >> (n))

#define CH(x, y, z) (((x) & (y)) ^ (~(x) & (z)))
#define MAJ(x, y, z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
#define EP0(x) (ROTR(x, 2) ^ ROTR(x, 13) ^ ROTR(x, 22))
#define EP1(x) (ROTR(x, 6) ^ ROTR(x, 11) ^ ROTR(x, 25))
#define SIG0(x) (ROTR(x, 7) ^ ROTR(x, 18) ^ SHR(x, 3))
#define SIG1(x) (ROTR(x, 17) ^ ROTR(x, 19) ^ SHR(x, 10))

static const uint32_t 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
};

static void sha256_transform(uint32_t state[8], const uint8_t data[64])
{
    uint32_t 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] = (data[j] << 24) | (data[j+1] << 16) | (data[j+2] << 8) | (data[j+3]);
    for (; i<64; ++i)
        m[i] = SIG1(m[i-2]) + m[i-7] + SIG0(m[i-15]) + m[i-16];

    a = state[0];
    b = state[1];
    c = state[2];
    d = state[3];
    e = state[4];
    f = state[5];
    g = state[6];
    h = 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;
    }

    state[0] += a;
    state[1] += b;
    state[2] += c;
    state[3] += d;
    state[4] += e;
    state[5] += f;
    state[6] += g;
    state[7] += h;
}

void sha256(const uint8_t *msg, size_t len, uint8_t hash[32])
{
    uint32_t state[8] = {
        0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a,
        0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19
    };
    uint8_t data[64];
    size_t i, j;

    for (i=0; i<len; ++i) {
        if ((i & 63) == 0 && i > 0)
            sha256_transform(state, data);
        j = i & 63;
        data[j] = msg[i];
    }

    j = i & 63;
    data[j++] = 0x80;
    if (j > 56) {
        memset(data+j, 0, 64-j);
        sha256_transform(state, data);
        j = 0;
    }
    memset(data+j, 0, 56-j);
    uint64_t bitlen = (uint64_t)len * 8;
    data[56] = (bitlen >> 56) & 0xff;
    data[57] = (bitlen >> 48) & 0xff;
    data[58] = (bitlen >> 40) & 0xff;
    data[59] = (bitlen >> 32) & 0xff;
    data[60] = (bitlen >> 24) & 0xff;
    data[61] = (bitlen >> 16) & 0xff;
    data[62] = (bitlen >> 8) & 0xff;
    data[63] = bitlen & 0xff;
    sha256_transform(state, data);

    for (i=0; i<8; ++i) {
        hash[i*4] = (state[i] >> 24) & 0xff;
        hash[i*4+1] = (state[i] >> 16) & 0xff;
        hash[i*4+2] = (state[i] >> 8) & 0xff;
        hash[i*4+3] = state[i] & 0xff;
    }
}

int main(int argc, char **argv)
{
    if (argc < 2) {
        printf("Usage: %s <filename>\n", argv[0]);
        return 1;
    }

    FILE *fp = fopen(argv[1], "rb");
    if (!fp) {
        printf("Unable to open file: %s\n", argv[1]);
        return 1;
    }

    fseek(fp, 0L, SEEK_END);
    size_t size = ftell(fp);
    rewind(fp);

    uint8_t *buf = (uint8_t*)malloc(size);
    if (!buf) {
        printf("Unable to allocate memory\n");
        fclose(fp);
        return 1;
    }

    if (fread(buf, 1, size, fp) != size) {
        printf("Unable to read file: %s\n", argv[1]);
        fclose(fp);
        free(buf);
        return 1;
    }

    uint8_t hash[32];
    sha256(buf, size, hash);

    printf("SHA-256 hash of %s:\n", argv[1]);
    for (int i=0; i<32; ++i)
        printf("%02x", hash[i]);
    printf("\n");

    free(buf);
    fclose(fp);
    return 0;
}

该程序使用了BS模式，对文件进行SHA-256算法计算，并输出计算结果。用户可以在命令行中指定要计算哈希值的文件，程序会打开文件并读取其中的内容，然后对内容进行哈希计算。计算结果以16进制形式输出。