php 生成加密公钥加密私钥实例详解

php 生成加密公钥加密私钥实例详解

生成公钥私钥     win下必须要openssl.cof支持   liunx一般已自带安装 

$config = array( 
  //"digest_alg" => "sha512", 
  "private_key_bits" => 512,           //字节数  512 1024 2048  4096 等 
  "private_key_type" => openssl_keytype_rsa,   //加密类型 
); 
   
//1.创建公钥和私钥  返回资源 
$res = openssl_pkey_new($config); 
 
//从得到的资源中获取私钥  并把私钥赋给$privkey
openssl_pkey_export($res, $privkey); 
 
//从得到的资源中获取私钥  并把私钥赋给$pubkey
$pubkey = openssl_pkey_get_details($res); 
 
$pubkey = $pubkey["key"]; 
var_dump(array('privkey'=>$privkey,'pubkey'=>$pubkey)); 
die; 

//2.加密解密数据 要加密的数据 
$data = 'plaintext data goes here';             

//对$data进行加密 要加密的数据字符串 得到加密后的数据 加密所需要的公钥
openssl_public_encrypt($data, $encrypted, $pubkey); 
echo base64_encode($encrypted); 
 
//对加密后的数据进行解密 解密的数据 得到解密后的数据 解密所需要的私钥
$decrypted = base64_decode($encrypted);
openssl_private_decrypt($encrypted, $decrypted, $privkey); 
echo $decrypted;  

//3.一个加密解密类 
class rsa { 
  private $public_key = ''; //公密钥 
  private $private_key = ''; //私密钥 
  private $public_key_resource = ''; //公密钥资源 
  private $private_key_resource = ''; //私密钥资源 
  /** 
   * 架构函数 
   * @param [string] $public_key_file [公密钥文件地址] 
   * @param [string] $private_key_file [私密钥文件地址] 
   */ 
  public function __construct($public_key,$private_key) { 
    $this->public_key = $public_key;   
 $this->private_key = $private_key;
 
 if(false == ($this->public_key_resource = $this->is_bad_public_key($this->public_key)) || false == ($this->private_key_resource = $this->is_bad_private_key($this->private_key))) { 
  throw new exception('public key or private key no usable'); 
 } 
  } 
  private function is_bad_public_key($public_key) { 
    return openssl_pkey_get_public($public_key); 
  } 
  private function is_bad_private_key($private_key) { 
    return openssl_pkey_get_private($private_key); 
  } 
  /** 
   * 生成一对公私密钥 成功返回 公私密钥数组 失败 返回 false 
   */ 
  public function create_key() { 
    $res = openssl_pkey_new(); 
    if($res == false) return false; 
    openssl_pkey_export($res, $private_key); 
    $public_key = openssl_pkey_get_details($res); 
    return array('public_key'=>$public_key["key"],'private_key'=>$private_key); 
  } 
  /** 
   * 用私密钥加密 
   */ 
  public function private_encrypt($input) { 
    openssl_private_encrypt($input,$output,$this->private_key_resource); 
    return base64_encode($output); 
  } 
  /** 
   * 解密 私密钥加密后的密文 
   */ 
  public function public_decrypt($input) { 
    openssl_public_decrypt(base64_decode($input),$output,$this->public_key_resource); 
    return $output; 
  } 
  /** 
   * 用公密钥加密 
   */ 
  public function public_encrypt($input) { 
    openssl_public_encrypt($input,$output,$this->public_key_resource); 
    return base64_encode($output); 
  } 
  /** 
   * 解密 公密钥加密后的密文 
   */ 
  public function private_decrypt($input) { 
    openssl_private_decrypt(base64_decode($input),$output,$this->private_key_resource); 
    return $output; 
  } 
} 

$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-----';

$rsa = new rsa($public_key,$private_key);  
$str = '加密解密'; 
$str = $rsa->public_encrypt($str); //用公密钥加密 
echo $str,'</br>'; 
$str = $rsa->private_decrypt($str); //用私密钥解密 
echo $str,'</br>'; 
//============================================================= 
$str = $rsa->private_encrypt($str); //用私密钥加密 
echo $str,'</br>'; 
$str = $rsa->public_decrypt($str); //用公密钥解密 
echo $str,'</br>'; 

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