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首先
需要安装扩展 xmlseclibs
地址：https://github.com/robrichards/xmlseclibs
然后
看下面示例（github上面也有测试的调用示例）
/** * generateXMLSignFields XML生成签名域 * Use sha256withrsa algorithm to generate XML internal signature * @param $xml * @return string * @throws \Exception * @author liuml <liumenglei0211@163.com> * @DateTime 2018/12/21 16:37 */ protected function generateXMLSignFields($xml) { // 加载要签名的XML $doc = new \DOMDocument(); $doc->loadXML($xml); // 创建一个新的安全对象 $objDSig = new XMLSecurityDSig(); // 使用c14n专属规范化 $objDSig->setCanonicalMethod(XMLSecurityDSig::C14N); // 签名使用 SHA-256 $objDSig->addReference( $doc, XMLSecurityDSig::SHA1, array('http://www.w3.org/2000/09/xmldsig#enveloped-signature') ); // 创建一个新的(私有)安全密钥 $objKey = new XMLSecurityKey(XMLSecurityKey::RSA_SHA256, array('type' => 'private')); // 如果密钥有密码，则使用它进行设置 // $objKey->passphrase = '<passphrase>'; // 加载私钥 $objKey->loadKey("-----BEGIN RSA PRIVATE KEY-----\n" . $this->privateKey . "\n-----END RSA PRIVATE KEY-----\n"); // 对XML文件签名 $objDSig->sign($objKey); // 将关联的公钥添加到签名 $objDSig->add509Cert("-----BEGIN PUBLIC KEY-----\n" . $this->publicKey . "\n-----END PUBLIC KEY-----\n"); // 将签名附加到XML $objDSig->appendSignature($doc->documentElement); return $doc->saveXML(); } /** * checkResponseSign 验证签名 * Validate signatures in XML * @param $xml * @return bool * @throws \Exception * @author liuml <liumenglei0211@163.com> * @DateTime 2018/12/21 17:51 */ protected function checkResponseSign($xml) { $doc = new \DOMDocument(); $doc->loadXML($xml); $objXMLSecDSig = new XMLSecurityDSig(); $objDSig = $objXMLSecDSig->locateSignature($doc); if (!$objDSig) { throw new \Exception("Cannot locate Signature Node"); } $objXMLSecDSig->canonicalizeSignedInfo(); $objXMLSecDSig->idKeys = array('wsu:Id'); $objXMLSecDSig->idNS = array('wsu' => 'http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd'); $retVal = $objXMLSecDSig->validateReference(); if (!$retVal) { throw new \Exception("Reference Validation Failed"); } $objKey = $objXMLSecDSig->locateKey(); if (!$objKey) { throw new \Exception("We have no idea about the key"); } $key = NULL; $objKeyInfo = XMLSecEnc::staticLocateKeyInfo($objKey, $objDSig); if (!$objKeyInfo->key && empty($key)) { $objKey->loadKey("-----BEGIN PUBLIC KEY-----\n" . $this->myBankPublicKey . "\n-----END PUBLIC KEY-----\n"); } if ($objXMLSecDSig->verify($objKey) === 1) { return true; } else { return false; } }