php 生成加密公鑰加密私鑰實例詳解

生成公鑰私鑰 win下必須要openssl.cof支持 liunx一般已自帶安裝

$config = array(

//"digest_alg" => "sha512",

"private_key_bits" => 512, //字節數 512 1024 2048 4096 等

"private_key_type" => OPENSSL_KEYTYPE_RSA, //加密類型

);

//1.創建公鑰和私鑰 返回資源

$res = openssl_pkey_new($config);

//從得到的資源中獲取私鑰 并把私鑰賦給$privKey

openssl_pkey_export($res, $privKey);

//從得到的資源中獲取私鑰 并把私鑰賦給$pubKey

$pubKey = openssl_pkey_get_details($res);

$pubKey = $pubKey["key"];

var_dump(array('privKey'=>$privKey,'pubKey'=>$pubKey));

die;

//2.加密解密數據 要加密的數據

$data = 'plaintext data goes here';

//對$data進行加密 要加密的數據字符串 得到加密后的數據 加密所需要的公鑰

openssl_public_encrypt($data, $encrypted, $pubKey);

echo base64_encode($encrypted);

//對加密后的數據進行解密 解密的數據 得到解密后的數據 解密所需要的私鑰

$decrypted = base64_decode($encrypted);

openssl_private_decrypt($encrypted, $decrypted, $privKey);

echo $decrypted;

//3.一個加密解密類

class rsa {

private $public_key = ''; //公密鑰

private $private_key = ''; //私密鑰

private $public_key_resource = ''; //公密鑰資源

private $private_key_resource = ''; //私密鑰資源

/**

* 架構函數

* @param [string] $public_key_file [公密鑰文件地址]

* @param [string] $private_key_file [私密鑰文件地址]

*/

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);

}

/**

* 生成一對公私密鑰 成功返回 公私密鑰數組 失敗 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);

}

/**

* 用私密鑰加密

*/

public function private_encrypt($input) {

openssl_private_encrypt($input,$output,$this->private_key_resource);

return base64_encode($output);

}

/**

* 解密 私密鑰加密后的密文

*/

public function public_decrypt($input) {

openssl_public_decrypt(base64_decode($input),$output,$this->public_key_resource);

return $output;

}

/**

* 用公密鑰加密

*/

public function public_encrypt($input) {

openssl_public_encrypt($input,$output,$this->public_key_resource);

return base64_encode($output);

}

/**

* 解密 公密鑰加密后的密文

*/

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); //用公密鑰加密

echo $str,'';

$str = $rsa->private_decrypt($str); //用私密鑰解密

echo $str,'';

//=============================================================

$str = $rsa->private_encrypt($str); //用私密鑰加密

echo $str,'';

$str = $rsa->public_decrypt($str); //用公密鑰解密

echo $str,'';

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