public static String hmacsha256(String plainStr, String key) { SecretKeySpec secretKey = new SecretKeySpec(key.getBytes(Charset.forName("UTF-8")), "HmacSHA256"); Mac mac=null; try { mac = Mac.getInstance(secretKey.getAlgorithm()); mac.init(secretKey); } catch (NoSuchAlgorithmException | InvalidKeyException e) { e.printStackTrace(); } byte digest[] = mac.doFinal(plainStr.getBytes(Charset.forName("UTF- 8"))); return new StringBuilder().append(byte2HexStr(digest)).toString(); } public static String byte2HexStr(byte array[]) { return array != null ? new String(Hex.encodeHex(array)) : null; } 转为 PHP

以下是将Java代码转换为PHP代码的实现：

function hmacsha256($plainStr, $key) {
  $secretKey = new \SecretKeySpec(utf8_encode($key), "HmacSHA256");
  $mac = null;
  try {
    $mac = \Mac::getInstance($secretKey->getAlgorithm());
    $mac->init($secretKey);
  } catch (\NoSuchAlgorithmException | \InvalidKeyException $e) {
    echo $e->getMessage();
  }
  $digest = $mac->doFinal(utf8_encode($plainStr));
  return byte2HexStr($digest);
}

function byte2HexStr($array) {
  return $array != null ? bin2hex($array) : null;
}

注意，该PHP代码需要使用PHP 7.1或更高版本，因为它使用了PHP 7.1中的二进制字面量语法。另外，还需要确保已经加载了Hex编码器。

相关问题

public static String hmacsha256(String plainStr, String key) { SecretKeySpec secretKey = new SecretKeySpec(key.getBytes(Charset.forName("UTF-8")), "HmacSHA256"); Mac mac=null; try { mac = Mac.getInstance(secretKey.getAlgorithm()); mac.init(secretKey); } catch (NoSuchAlgorithmException | InvalidKeyException e) { e.printStackTrace(); } byte digest[] = mac.doFinal(plainStr.getBytes(Charset.forName("UTF- 8"))); return new StringBuilder().append(byte2HexStr(digest)).toString(); } public static String byte2HexStr(byte array[]) { return array != null ? new String(Hex.encodeHex(array)) : null; } java to PHP

Here's the PHP equivalent of the Java code for computing HMAC-SHA256:

function hmacsha256($plainStr, $key) {
    $secretKey = utf8_encode($key);
    $digest = hash_hmac('sha256', utf8_encode($plainStr), $secretKey, true);
    return bin2hex($digest);
}

Note that in PHP, the `hash_hmac` function is used to compute the HMAC with SHA256. The third parameter of `hash_hmac` is set to `true` to get the output as raw binary data. The `bin2hex` function is then used to convert the binary data to a hexadecimal string, which is the same format as the output of the `byte2HexStr` function in the Java code.

Also note that in PHP, strings are already represented as Unicode, so there's no need to convert the key and plain string to UTF-8 encoding using the `Charset.forName("UTF-8")` method.

签名步骤：byte2HexStr (HMAC_SHA256(post-content +RequestURI, key)， RequestURI 以”/” 开头，不包括域名；post-content 是指发送的完整 json 数据；key= AppSecret+Nonce+ timestamp， AppSecret 是和 vendorId 对应的密钥，签名的结果需要放到 name 为”parm-sign” 的 http header 中。 以下代码列出了 java 版本的签名实现： import javax.crypto.Mac; import javax.crypto.spec.SecretKeySpec; import java.nio.charset.Charset; import java.security.InvalidKeyException; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; import org.apache.commons.codec.binary.Hex; public class EncryptUtil { /** * * @param plainStr 需要加密的字符串 * @param key key=AppSecret+nonce+ timestamp * @return 加密后的字符串 */ public static String hmacsha256(String plainStr, String key) { SecretKeySpec secretKey = new SecretKeySpec(key.getBytes(Charset.forName("UTF-8")), "HmacSHA256"); Mac mac=null; try { mac = Mac.getInstance(secretKey.getAlgorithm()); mac.init(secretKey); } catch (NoSuchAlgorithmException | InvalidKeyException e) { e.printStackTrace(); } byte digest[] = mac.doFinal(plainStr.getBytes(Charset.forName("UTF-8"))); return new StringBuilder().append(byte2HexStr(digest)).toString(); } public static String byte2HexStr(byte array[]) { return array != null ? new String(Hex.encodeHex(array)) : null; } } 请以PHP7.4版本实现签名

以下是PHP 7.4版本的实现，使用了相同的依赖库`apache/commons-codec`来进行十六进制编码。

<?php

use function Sodium\crypto_generichash;
use function Sodium\crypto_pwhash_str;
use function Sodium\crypto_pwhash_str_verify;

require_once __DIR__ . '/vendor/autoload.php';

function hmacsha256($plainStr, $key)
{
    $secretKey = new \SecretKeySpec(
        utf8_encode($key),
        'HmacSHA256'
    );

    $mac = hash_init('sha256', HASH_HMAC, $secretKey);
    hash_update($mac, utf8_encode($plainStr));
    $digest = hash_final($mac, true);

    return byte2HexStr($digest);
}

function byte2HexStr($array)
{
    return $array !== null ? \strval(Hex::encode($array)) : null;
}

function generate_password($password, $salt)
{
    return crypto_pwhash_str($password, \SODIUM_CRYPTO_PWHASH_OPSLIMIT_INTERACTIVE, \SODIUM_CRYPTO_PWHASH_MEMLIMIT_INTERACTIVE);
}

function verify_password($hash, $password)
{
    return crypto_pwhash_str_verify($hash, $password);
}

使用方法示例：

$plainStr = '...'; // post-content RequestURI
$key = '...'; // AppSecret Nonce timestamp

$sign = hmacsha256($plainStr, $key);

$headers = [
    'parm-sign: ' . $sign,
];

// 发送HTTP请求，携带上述 headers