cc2530 T1CC0L=50000&0x00ff

这是一个嵌入式系统的编程问题，其中cc2530是一款系统芯片。T1CC0L是一个16位计数寄存器的名称，该寄存器用于定时器1的计数。在这个语句中，将50000与0x00ff进行按位与操作，得到的结果是0x0030。然后，将这个结果赋值给T1CC0L寄存器的低8位，从而将T1CC0L的值设置为0x0030。这个操作可能用于配置定时器1的计数，以生成一个特定的时间延迟或频率。

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。

给我一段Hash256的标准C语言源代码

### 回答1：
下面是一段 Hash256 的 C 语言源代码：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <openssl/sha.h>

int main(int argc, char *argv[])
{
unsigned char hash[SHA256_DIGEST_LENGTH];
const char *input = "Hello, world!";

SHA256((unsigned char*)input, strlen(input), hash);

for (int i = 0; i < SHA256_DIGEST_LENGTH; i++)
printf("%02x", hash[i]);
printf("\n");

return 0;
}

这段代码使用了 OpenSSL 库中的 SHA256 函数来对输入的字符串 "Hello, world!" 进行哈希。最后输出的是十六进制编码的哈希值。

### 回答2：
以下是使用标准C语言的Hash256算法的源代码：

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

#define ROTLEFT(x, c) (((x) << (c)) | ((x) >> (32 - (c))))

#define SHA256_BLOCK_SIZE 32

typedef struct {
    uint8_t data[64];
    uint32_t datalen;
    unsigned long long bitlen;
    uint32_t state[8];
} SHA256_CTX;

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
};

void sha256_transform(SHA256_CTX *ctx, const uint8_t data[]) {
    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] = (ROTLEFT(m[i - 2], 17) ^ ROTLEFT(m[i - 2], 19) ^ (m[i - 2] >> 10)) + m[i - 7] +
               (ROTLEFT(m[i - 15], 7) ^ ROTLEFT(m[i - 15], 18) ^ (m[i - 15] >> 3)) + 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 + (ROTLEFT(e, 6) ^ ROTLEFT(e, 11) ^ ROTLEFT(e, 25)) + ((e & f) ^ (~e & g)) + k[i] + m[i];
        t2 = (ROTLEFT(a, 2) ^ ROTLEFT(a, 13) ^ ROTLEFT(a, 22)) + ((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 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 uint8_t data[], uint32_t len) {
    uint32_t i;

    for (i = 0; i < len; ++i) {
        ctx->data[ctx->datalen] = data[i];
        ctx->datalen++;
        if (ctx->datalen == 64) {
            sha256_transform(ctx, ctx->data);
            ctx->bitlen += 512;
            ctx->datalen = 0;
        }
    }
}

void sha256_final(SHA256_CTX *ctx, uint8_t hash[]) {
    uint32_t i;

    i = ctx->datalen;

    if (ctx->datalen < 56) {
        ctx->data[i++] = 0x80;
        while (i < 56)
            ctx->data[i++] = 0x00;
    } else {
        ctx->data[i++] = 0x80;
        while (i < 64)
            ctx->data[i++] = 0x00;
        sha256_transform(ctx, ctx->data);
        memset(ctx->data, 0, 56);
    }

    ctx->bitlen += ctx->datalen * 8;
    ctx->data[63] = ctx->bitlen;
    ctx->data[62] = ctx->bitlen >> 8;
    ctx->data[61] = ctx->bitlen >> 16;
    ctx->data[60] = ctx->bitlen >> 24;
    ctx->data[59] = ctx->bitlen >> 32;
    ctx->data[58] = ctx->bitlen >> 40;
    ctx->data[57] = ctx->bitlen >> 48;
    ctx->data[56] = ctx->bitlen >> 56;
    sha256_transform(ctx, ctx->data);

    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;
    }
}

int main() {
    char str[] = "Hello World";
    uint8_t hash[SHA256_BLOCK_SIZE];
    SHA256_CTX ctx;

    sha256_init(&ctx);
    sha256_update(&ctx, (uint8_t *)str, strlen(str));
    sha256_final(&ctx, hash);

    printf("Hash: ");
    for (int i = 0; i < SHA256_BLOCK_SIZE; i++) {
        printf("%02x", hash[i]);
    }
    printf("\n");

    return 0;
}

该源代码使用SHA-256算法实现了Hash256的功能。它包含了SHA256_CTX结构体用于保存中间状态和结果，以及定义了SHA256的各种操作函数，如sha256_transform、sha256_update和sha256_final等。在main函数中，通过传入待哈希的字符串，调用这些函数对其进行SHA-256哈希计算，最后打印出计算得到的哈希值。

### 回答3：
Hash256是一种常用的哈希函数，它能够将任意长度的输入数据转化为固定长度的哈希值。以下是一段标准的C语言源代码实现：

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

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

void sha256(const uint8_t *message, uint32_t len, uint8_t hash[32]) {
    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
    };

    uint32_t h[8] = {
        0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19
    };

    uint32_t w[64];
    uint32_t a, b, c, d, e, f, g, h, i, j, t1, t2;

    for (i = 0; i < len / 64; i++) {
        memcpy(w, message + i * 64, 64);

        for (j = 16; j < 64; j++) {
            w[j] = w[j-16] + ROTL(w[j-15], 7) + w[j-7] + ROTL(w[j-2], 15);
        }

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

        for (j = 0; j < 64; j++) {
            t1 = h + SIGMA1(e) + CH(e, f, g) + k[j] + w[j];
            t2 = SIGMA0(a) + MAJ(a, b, c);
            h = g;
            g = f;
            f = e;
            e = d + t1;
            d = c;
            c = b;
            b = a;
            a = t1 + t2;
        }

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

    memcpy(hash, h, 32);
}

int main() {
    uint8_t message[] = "Hello, World!";
    uint8_t hash[32];

    sha256(message, sizeof(message) - 1, hash);

    printf("Hash: ");
    for (int i = 0; i < 32; i++) {
        printf("%02x", hash[i]);
    }
    printf("\n");

    return 0;
}

上述代码实现了对消息进行SHA-256哈希运算，并打印出哈希结果。可以根据需要将message数组替换为其他输入数据的数组，并在main函数中进行调用。