function Rsacheck($data){
//rsa私钥
$PRIVATEkey ='-----BEGIN PRIVATE KEY-----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-----END PRIVATE KEY-----'; //测试私钥
$data='ceshi';
$res = openssl_get_privatekey($PRIVATEkey);//必须通过OpenSSL的方法进行读取rsa的私钥否则如果直接使用私钥进行加密的话会出现乱码
$res =openssl_private_encrypt($data,$decrypt,$res);//rsa使用私钥进行加密，第一个是需要加密的参数，第二个是空参数，第三个是私钥
$sign = base64_encode($decrypt);//经过以上的加密后还是需要最后一步进行base64_encode，的加密，encode是加密，decode是解密
var_dump($sign);die;
}
RSA算法—解密—！
//rsa公钥解密---妥善保存好公钥
function check2(){
$publickey='
-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAql/yyHUPPiIbk/3QlNv9
l1js4eA234XRwrXz5RMcT4wX9ebJbs4prfxAiK1qPI4LeOKaJM9a14mM4n0j1/Q2
5pTSXBuat00NddmgS1hWybMCHIUl7xn5B3bUlz+t1neBoObgmVosjlX56OXkv9iQ
J0E1eKJ5v7wm59n6ZC52ChgDC4T8ftHGpr8WPxMBTBpfTCT7+JWtCLMKJqesrlSS
A0+5bGzBCumua6USqwytW5aMKCs15MXl8MeWcew2ho6E86UTo6irIAz2qZRMb/3T
9K4b0cyEIZDo2GEd2CC9t+PQQ9AbPq2/S+SUiiiFmxGswIvGje8QxWwrXe/PLKEp
AwIDAQAB
-----END PUBLIC KEY-----';
$data1='H8wz7AswZEV+jkAaQhTMu4+vsPQ432XL6QVB/UKiXShXUKR0HFTuA6L9KmA7PEtli1eqi4Q41BZ/iCl+aUxc9NIBve2mh3CC2gTj5LODSRV1BOY0F1BRkmTGZS5VKfhuce7KzkaTlgtHtH1j/nCqruMoAgWnFn0jh/767kGH4kq8uD2TrBqwx6JPfh2blQy2op3MpV5RIsb9MJnj/C/honjZ5u6WXOzntZhMVPkRCKIyh3H2hUrsXYFATkjcLmuJpoimfrUqldVuqSAdQ5me8c4w5e/mOHAFg3SHVhp/NgNQzdk75154GYrdOQxpY5pCeaFxw53myG1moiwTb3pe1g==';//测试数据
$data=base64_decode($data1);//拿到已经加密的密文，首先进行bade64_decode的解密这个是首要的，先解密。才能继续下一步
$res=openssl_public_decrypt($data,$decrypt,$publickey);//已经经过base64——decode的加密的密文还需要进行一次rsa公钥解密，跟加密的时候参数位置一样，
var_dump($decrypt);die;
}
RSA算法—加签—！
//rsa进行私钥加签
//以下使用rsa进行签名调用open_sgin的方法进行签名，记住这个是签名，不是加密，签名的密文跟加密的密文是不一样的，谨记！
function check3(){
$PRIVATEkey ='-----BEGIN PRIVATE KEY-----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-----END PRIVATE KEY-----';
$data='ceshi';//常规的业务流程就是参数拼接，最后加上唯一的MD5，最后赋值给$data。然后进行加签，这里只是测试而已
$res = openssl_get_privatekey($PRIVATEkey);//必须通过OpenSSL的方法进行读取rsa的私钥否则如果直接使用私钥进行加签的话会出现乱码
openssl_sign($data, $sign, $res,OPENSSL_ALGO_MD5);////rsa使用私钥进行加签，第一个是需要加密的参数，第二个是空参数，第三个是私钥，这里出现了第四个参数，OPENSSL_ALGO_MD5，这个是MD5实现的就是MD5withRSA签名的算法，看情况需求吧，有的需要有的不需要！
$sign = base64_encode($sign);//经过以上的加签后还是需要最后一步进行base64_encode，加密，encode是加密，decode是解密
var_dump($sign);die;
}
RSA算法—验签—！
function check4(){
$publickey='-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAql/yyHUPPiIbk/3QlNv9
l1js4eA234XRwrXz5RMcT4wX9ebJbs4prfxAiK1qPI4LeOKaJM9a14mM4n0j1/Q2
5pTSXBuat00NddmgS1hWybMCHIUl7xn5B3bUlz+t1neBoObgmVosjlX56OXkv9iQ
J0E1eKJ5v7wm59n6ZC52ChgDC4T8ftHGpr8WPxMBTBpfTCT7+JWtCLMKJqesrlSS
A0+5bGzBCumua6USqwytW5aMKCs15MXl8MeWcew2ho6E86UTo6irIAz2qZRMb/3T
9K4b0cyEIZDo2GEd2CC9t+PQQ9AbPq2/S+SUiiiFmxGswIvGje8QxWwrXe/PLKEp
AwIDAQAB
-----END PUBLIC KEY-----';
$data='ceshi';
$sign='BLHa1JaXonj3paLNBmFpm6rAKy46hBJxVp/JOm0U0Ipy6webw2ev5KYgWtU/vANeIwGcT+YJW9yPXYwd+LpdRscbegBRq0UDUH4Id14hojgkJYnOACl2SrbF470zn5pv6XBLYCUs3EXWMknV7exHOuyVfJSoyds3KC0ITEWoSsHSnjviW2sxMMY94tqLy9oh75QEk6uRksRB0GkTRHtYU3fW2So8hDNgL43FnCVKF6MCCkOvoGqbUpxWNCODYz0s3FyVjIA6zkdVRfnEpFEnR8zOTtjaAb+G7MHnfDLf6i8wgMqQGlosU0+9z0g89a6hjI/eujq9B0uu69wwX3Fbtg==';//测试数据
$res = openssl_get_publickey($publickey);
$result = (bool)openssl_verify($data, base64_decode($sign), $res,OPENSSL_ALGO_MD5);//$data是签名参数，$sign,是需要验签的签名，先对签名进行base64_decode的解密，然后在对签名密文进行MD5withRSA进行验签，验签是调用openssl内置方法验签，返回bool值
}
会员可下载实例文档进行参考！！！
