import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
public class HMACSHA256 {
/**
* 将加密后的字节数组转换成字符串
*
* @param b 字节数组
* @return 字符串
*/
public static String byteArrayToHexString(byte[] b) {
StringBuilder hs = new StringBuilder();
String stmp;
for (int n = 0; b != null && n < b.length; n++) {
stmp = Integer.toHexString(b[n] & 0XFF);
if (stmp.length() == 1)
hs.append('0');
hs.append(stmp);
}
return hs.toString().toLowerCase();
}
/**
* sha256_HMAC加密
*
* @param message 消息
* @param secret 秘钥
* @return 加密后字符串
*/
public static String sha256_HMAC(String message, String secret) {
String hash = "";
try {
Mac sha256_HMAC = Mac.getInstance("HmacSHA256");
SecretKeySpec secret_key = new SecretKeySpec(secret.getBytes(), "HmacSHA256");
sha256_HMAC.init(secret_key);
byte[] bytes = sha256_HMAC.doFinal(message.getBytes());
hash = byteArrayToHexString(bytes);
} catch (Exception e) {
System.out.println("Error HmacSHA256 ===========" + e.getMessage());
}
return hash;
}
public static void main(String[] args) {
String secret="aaa0711zzz";
System.err.println(sha256_HMAC(secret,"asd"));
}
}
输出：c6248891f19f33a0512f7b1b830f523cb6fc12797d6180881422abd2410d71a2
