php中用生成的公鑰、私鑰進行加密解密

<?php

$private_key = '-----BEGIN RSA PRIVATE KEY-----

MIICXQIBAAKBgQC3//sR2tXw0wrC2DySx8vNGlqt3Y7ldU9+LBLI6e1KS5lfc5jl

TGF7KBTSkCHBM3ouEHWqp1ZJ85iJe59aF5gIB2klBd6h4wrbbHA2XE1sq21ykja/

Gqx7/IRia3zQfxGv/qEkyGOx+XALVoOlZqDwh76o2n1vP1D+tD3amHsK7QIDAQAB

AoGBAKH14bMitESqD4PYwODWmy7rrrvyFPEnJJTECLjvKB7IkrVxVDkp1XiJnGKH

2h5syHQ5qslPSGYJ1M/XkDnGINwaLVHVD3BoKKgKg1bZn7ao5pXT+herqxaVwWs6

ga63yVSIC8jcODxiuvxJnUMQRLaqoF6aUb/2VWc2T5MDmxLhAkEA3pwGpvXgLiWL

3h7QLYZLrLrbFRuRN4CYl4UYaAKokkAvZly04Glle8ycgOc2DzL4eiL4l/+x/gaq

deJU/cHLRQJBANOZY0mEoVkwhU4bScSdnfM6usQowYBEwHYYh/OTv1a3SqcCE1f+

qbAclCqeNiHajCcDmgYJ53LfIgyv0wCS54kCQAXaPkaHclRkQlAdqUV5IWYyJ25f

oiq+Y8SgCCs73qixrU1YpJy9yKA/meG9smsl4Oh9IOIGI+zUygh9YdSmEq0CQQC2

4G3IP2G3lNDRdZIm5NZ7PfnmyRabxk/UgVUWdk47IwTZHFkdhxKfC8QepUhBsAHL

QjifGXY4eJKUBm3FpDGJAkAFwUxYssiJjvrHwnHFbg0rFkvvY63OSmnRxiL4X6EY

yI9lblCsyfpl25l7l5zmJrAHn45zAiOoBrWqpM5edu7c

-----END RSA PRIVATE KEY-----';

 

$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);//這個函數可用來判斷私鑰是否是可用的，可用傳回資源id Resource id

$pu_key = openssl_pkey_get_public($public_key);//這個函數可用來判斷公鑰是否是可用的

//print_r($pi_key);echo "\n";

//print_r($pu_key);echo "\n";





$data = "aassssasssddd";//原始資料

$encrypted = "";

$decrypted = "";



echo "加密前：",$data,"\n<br><br><br>";



echo "私鑰加密:\n<br><br>";
openssl_private_encrypt($data,$encrypted,$pi_key);//私鑰加密
$encrypted = base64_encode($encrypted);//加密後的内容通常含有特殊字元，需要編碼轉換下，在網絡間通過url傳輸時要注意base64編碼是否是url安全的
echo $encrypted,"\n<br><br>";

echo "私鑰加密的内容通過公鑰可用解密出來:\n<br><br>";



openssl_public_decrypt(base64_decode($encrypted),$decrypted,$pu_key);//私鑰加密的内容通過公鑰可用解密出來

echo $decrypted,"\n<br><br>";



echo "<br><br>---------------------------------------\n";

echo "公鑰加密:\n<br><br>";



openssl_public_encrypt($data,$encrypted,$pu_key);//公鑰加密

$encrypted = base64_encode($encrypted);

echo $encrypted,"\n<br><br>";



echo "私鑰解密:\n<br><br>";

openssl_private_decrypt(base64_decode($encrypted),$decrypted,$pi_key);//私鑰解密

echo $decrypted,"\n<br><br>";