PHP rsa加密解密使用方法

$public_key = '-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC3//sR2tXw0wrC2DySx8vNGlqt
3Y7ldU9+LBLI6e1KS5lfc5jlTGF7KBTSkCHBM3ouEHWqp1ZJ85iJe59aF5gIB2kl
Bd6h4wrbbHA2XE1sq21ykja/Gqx7/IRia3zQfxGv/qEkyGOx+XALVoOlZqDwh76o
2n1vP1D+tD3amHsK7QIDAQAB
-----END PUBLIC KEY-----';

//echo $private_key;
$pi_key = openssl_pkey_get_private($private_key);//这个函数可用来判断私钥是否是可用的，可用返回资源id Resource id
$pu_key = openssl_pkey_get_public($public_key);//这个函数可用来判断公钥是否是可用的
print_r($pi_key);echo "n";
print_r($pu_key);echo "n";

$data = "aassssasssddd";//原始数据
$encrypted = "";
$decrypted = "";

echo "source data:",$data,"n";

echo "private key encrypt:n";

openssl_private_encrypt($data,$encrypted,$pi_key);//私钥加密
$encrypted = base64_encode($encrypted);//加密后的内容通常含有特殊字符，需要编码转换下，在网络间通过url传输时要注意base64编码是否是url安全的
echo $encrypted,"n";

echo "public key decrypt:n";

openssl_public_decrypt(base64_decode($encrypted),$decrypted,$pu_key);//私钥加密的内容通过公钥可用解密出来
echo $decrypted,"n";

echo "---------------------------------------n";
echo "public key encrypt:n";

openssl_public_encrypt($data,$pu_key);//公钥加密
$encrypted = base64_encode($encrypted);
echo $encrypted,"n";

echo "private key decrypt:n";
openssl_private_decrypt(base64_decode($encrypted),$pi_key);//私钥解密
echo $decrypted,"n";