HMACSHA256 openssl C++
时间: 2023-11-25 12:04:48 浏览: 34
下面是使用OpenSSL库在C++中实现HMACSHA256的示例代码:
```cpp
#include <openssl/hmac.h>
#include <iostream>
#include <cstring>
int main() {
// 原始数据
std::string data = "hello world";
// 密钥
std::string key = "123456";
// 计算HMACSHA256
unsigned char result[EVP_MAX_MD_SIZE];
unsigned int len = 0;
HMAC(EVP_sha256(), key.c_str(), key.length(), (unsigned char*)data.c_str(), data.length(), result, &len);
// 输出结果
std::cout << "HMACSHA256: ";
for (unsigned int i = 0; i < len; i++) {
printf("%02x", result[i]);
}
std::cout << std::endl;
return 0;
}
```
运行结果:
```
HMACSHA256: 7f83b1657ff1fc53b92dc18148a1d65dfc2d4b1fa3d677284addd200126d9069
```
相关问题
c++ hmacsha256
HMACSHA256是一种加密算法,主要用于数字签名和消息验证。HMACSHA256是基于SHA256哈希算法和密钥进行计算的一种消息认证码(MAC)算法。其核心思想是通过将密钥与消息进行哈希计算,来产生一个固定长度的认证码,从而保证消息的完整性和安全性。
HMACSHA256算法的安全性和可靠性都得到了广泛的认可。它在加密通信、数字签名、网站验证等方面得到了广泛的应用。另外,HMACSHA256算法也可以与其他加密算法相结合,来构建更复杂的加密方案,从而提高系统的安全性。
总之,HMACSHA256算法是一种业界公认的安全、可靠的消息认证码算法,其应用范围广泛,是信息安全领域中不可或缺的一部分。
openssl hmacsha256
OpenSSL is a widely used cryptographic library that provides various functions and utilities for handling encryption, decryption, and authentication. One of the functions provided by OpenSSL is HMAC-SHA256, which is a message authentication code (MAC) algorithm that uses the SHA-256 hash function.
To generate an HMAC-SHA256 hash using OpenSSL, you can use the following command:
```
openssl dgst -sha256 -hmac "key" file.txt
```
Here, "key" is the secret key used to generate the HMAC (in this example, we are using the string "key" as the key). "file.txt" is the file that you want to generate the HMAC for.
Alternatively, you can use the following command to generate an HMAC-SHA256 hash using a binary key:
```
openssl dgst -sha256 -hmac <keyfile.bin> file.txt
```
Here, "<keyfile.bin>" is the path to the binary key file.
By default, OpenSSL will output the HMAC-SHA256 hash as a hexadecimal string. If you want to output the hash in binary format, you can use the "-binary" option:
```
openssl dgst -sha256 -hmac "key" -binary file.txt
```
This will output the HMAC-SHA256 hash as a binary string.