OpenSSL RSA_sign C++ -与命令行不同的符号

#include <openssl/rsa.h>
#include <openssl/pem.h>

// 签名函数
bool signData(const unsigned char* data, size_t dataLen, const char* privateKeyFile, unsigned char* signature, size_t* signatureLen) {
    FILE* privateKey = fopen(privateKeyFile, "r");
    if (!privateKey) {
        return false;
    }

    RSA* rsa = PEM_read_RSAPrivateKey(privateKey, NULL, NULL, NULL);
    fclose(privateKey);
    if (!rsa) {
        return false;
    }

    int result = RSA_sign(NID_sha256, data, dataLen, signature, signatureLen, rsa);
    RSA_free(rsa);

    return result == 1;
}

int main() {
    const unsigned char* data = (const unsigned char*)"Hello, World!";
    size_t dataLen = strlen((const char*)data);

    unsigned char signature[4096];
    size_t signatureLen = sizeof(signature);

    const char* privateKeyFile = "private_key.pem";

    if (signData(data, dataLen, privateKeyFile, signature, &signatureLen)) {
        // 签名成功，可以使用签名结果进行后续操作
    } else {
        // 签名失败
    }

    return 0;
}