欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  IT编程

关于PHP的RSA加密实例讲解

程序员文章站 2022-06-17 10:22:05
这几天做了一些接口的对接需要用到RSA加密,百度一番发现原来有个openssl_public_encrypt函数,简单看了一下,恩,开干。 坑! 1.确认是否开启ssl...

这几天做了一些接口的对接需要用到RSA加密,百度一番发现原来有个openssl_public_encrypt函数,简单看了一下,恩,开干。

坑!

1.确认是否开启ssl

关于PHP的RSA加密实例讲解

2.解决总是返回false

2.1检查你的加密字符串是否超过117个字节

2.2检查公钥的缩进(这个貌似很严格)

2.3还是不行的话请用openssl_pkey_get_public($public_key)查看是否有返回resource ,如果没有请更换你的php版本。

我在PHP5.5.7是不行,更换到了5.6.25解决了。最后附上一个RSA类(网上找的,用于加密超过117个字节的字符,希望

能帮到你)

----------------------------------------------------华丽分割------------------------------------------------------

if (! function_exists('url_safe_base64_encode')) {

function url_safe_base64_encode ($data) {

return str_replace(array('+','/', '='),array('-','_', ''), base64_encode($data));

}

}

if (! function_exists('url_safe_base64_decode')) {

function url_safe_base64_decode ($data) {

$base_64 = str_replace(array('-','_'),array('+','/'), $data);

return base64_decode($base_64);

}

}

class XRsa

{

const CHAR_SET = "UTF-8";

const BASE_64_FORMAT = "UrlSafeNoPadding";

const RSA_ALGORITHM_KEY_TYPE = OPENSSL_KEYTYPE_RSA;

const RSA_ALGORITHM_SIGN = OPENSSL_ALGO_SHA256;

protected $public_key;

protected $private_key;

protected $key_len;

public function __construct($pub_key, $pri_key = null)

{

$this->public_key = $pub_key;

$this->private_key = $pri_key;

$pub_id = openssl_get_publickey($this->public_key);

$this->key_len = openssl_pkey_get_details($pub_id)['bits'];

}

/*

* 创建密钥对

*/

public static function createKeys($key_size = 2048)

{

$config = array(

"private_key_bits" => $key_size,

"private_key_type" => self::RSA_ALGORITHM_KEY_TYPE,

);

$res = openssl_pkey_new($config);

openssl_pkey_export($res, $private_key);

$public_key_detail = openssl_pkey_get_details($res);

$public_key = $public_key_detail["key"];

return [

"public_key" => $public_key,

"private_key" => $private_key,

];

}

/*

* 公钥加密

*/

public function publicEncrypt($data)

{

$encrypted = '';

$part_len = $this->key_len / 8 - 11;

$parts = str_split($data, $part_len);

foreach ($parts as $part) {

$encrypted_temp = '';

openssl_public_encrypt($part, $encrypted_temp, $this->public_key);

$encrypted .= $encrypted_temp;

}

return url_safe_base64_encode($encrypted);

}

/*

* 私钥解密

*/

public function privateDecrypt($encrypted)

{

$decrypted = "";

$part_len = $this->key_len / 8;

$base64_decoded = url_safe_base64_decode($encrypted);

$parts = str_split($base64_decoded, $part_len);

foreach ($parts as $part) {

$decrypted_temp = '';

openssl_private_decrypt($part, $decrypted_temp,$this->private_key);

$decrypted .= $decrypted_temp;

}

return $decrypted;

}

/*

* 私钥加密

*/

public function privateEncrypt($data)

{

$encrypted = '';

$part_len = $this->key_len / 8 - 11;

$parts = str_split($data, $part_len);

foreach ($parts as $part) {

$encrypted_temp = '';

openssl_private_encrypt($part, $encrypted_temp, $this->private_key);

$encrypted .= $encrypted_temp;

}

return url_safe_base64_encode($encrypted);

}

/*

* 公钥解密

*/

public function publicDecrypt($encrypted)

{

$decrypted = "";

$part_len = $this->key_len / 8;

$base64_decoded = url_safe_base64_decode($encrypted);

$parts = str_split($base64_decoded, $part_len);

foreach ($parts as $part) {

$decrypted_temp = '';

openssl_public_decrypt($part, $decrypted_temp,$this->public_key);

$decrypted .= $decrypted_temp;

}

return $decrypted;

}

/*

* 数据加签

*/

public function sign($data)

{

openssl_sign($data, $sign, $this->private_key, self::RSA_ALGORITHM_SIGN);

return url_safe_base64_encode($sign);

}

/*

* 数据签名验证

*/

public function verify($data, $sign)

{

$pub_id = openssl_get_publickey($this->public_key);

$res = openssl_verify($data, url_safe_base64_decode($sign), $pub_id, self::RSA_ALGORITHM_SIGN);

return $res;

}

}

?>