php rsa签名

public function rsaSign($data,$private_key,$pass) {
    $certs = array();
    openssl_pkcs12_read(file_get_contents($private_key), $certs, $pass); //其中pass为你的证书密码

    if(!$certs) return ;
    $signature = '';
    openssl_sign($data, $signature, $certs['pkey']);
    return base64_encode($signature);
}

 

$sign = $this->rsaSign($signInput,$this->PRI_KEY_PATH,$this->CERT_PWD);