RSA非对称加密算法，如果是公钥加密，就得用私钥解密，反过来也一样，私钥加密的就用公钥解密，以下是相关实现函数
PriKye = $this->_getRsaPriKey();
$this->PubKey = $this->_getRsaPubKey();
}
/**
* RSA私钥加密
* @param string $private_key 私钥
* @param string $data 要加密的字符串
* @return string $encrypted 返回加密后的字符串
* @author mosishu
*/
public function privateEncrypt( $data)
{
$encrypted = '';
$pi_key = openssl_pkey_get_private($this->PriKye);//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
//最大允许加密长度为117，得分段加密
$plainData = str_split($data, 100);//生成密钥位数 1024 bit key
foreach ($plainData as $chunk) {
$partialEncrypted = '';
$encryptionOk = openssl_private_encrypt($chunk, $partialEncrypted, $pi_key);//私钥加密
if ($encryptionOk === false) {
return false;
}
$encrypted .= $partialEncrypted;
}
$encrypted = base64_encode($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
return $encrypted;
}
/**
* RSA公钥解密(私钥加密的内容通过公钥可以解密出来)
* @param string $public_key 公钥
* @param string $data 私钥加密后的字符串
* @return string $decrypted 返回解密后的字符串
* @author mosishu
*/
public function publicDecrypt($data)
{
$decrypted = '';
$pu_key = openssl_pkey_get_public($this->PubKey);//这个函数可用来判断公钥是否是可用的
$plainData = str_split(base64_decode($data), 128);//生成密钥位数 1024 bit key
foreach ($plainData as $chunk) {
$str = '';
$decryptionOk = openssl_public_decrypt($chunk, $str, $pu_key);//公钥解密
if ($decryptionOk === false) {
return false;
}
$decrypted .= $str;
}
return $decrypted;
}
/**
* 获取Rsa私钥
*
* @return string
*/
private function _getRsaPriKey ()
{$rsaPriKey = <<这是一个私匙 加密 公匙 解密的类 ，调用
$ps = new Rsa();
$str = '我是谁，我在哪';
echo $ps->privateEncrypt($str);
结果：
F9ijWmD5EOjUbu3dHKMCoDZlITt0YaNeEEcBlENpQggtRtqnVZKqfe0DdUZzB6bQGt8bMl0eV13Ss/2e8XBDBfJ4ZK08oCYrwvbemyy4x/43HfJTgbJmoDJyKUZYu3CfL83oZrNAB2U59vEOG5DXcZlV0sHCBZdSXgAlkqU88fM=
下面解密：
$ps = new Rsa();
$str = '我是谁，我在哪';
echo $ps->publicDecrypt($ps->privateEncrypt($str));
结果：
image.png
同理、公匙加密 私匙 解密也是同样的道理，下面附上源码：
PriKye = $this->_getRsaPriKey();
$this->PubKey = $this->_getRsaPubKey();
}
/**
* RSA私钥加密
* @param string $private_key 私钥
* @param string $data 要加密的字符串
* @return string $encrypted 返回加密后的字符串
* @author mosishu
*/
public function privateEncrypt( $data)
{
$encrypted = '';
$pi_key = openssl_pkey_get_private($this->PriKye);//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
//最大允许加密长度为117，得分段加密
$plainData = str_split($data, 100);//生成密钥位数 1024 bit key
foreach ($plainData as $chunk) {
$partialEncrypted = '';
$encryptionOk = openssl_private_encrypt($chunk, $partialEncrypted, $pi_key);//私钥加密
if ($encryptionOk === false) {
return false;
}
$encrypted .= $partialEncrypted;
}
$encrypted = base64_encode($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
return $encrypted;
}
/**
* RSA公钥解密(私钥加密的内容通过公钥可以解密出来)
* @param string $public_key 公钥
* @param string $data 私钥加密后的字符串
* @return string $decrypted 返回解密后的字符串
* @author mosishu
*/
public function publicDecrypt($data)
{
$decrypted = '';
$pu_key = openssl_pkey_get_public($this->PubKey);//这个函数可用来判断公钥是否是可用的
$plainData = str_split(base64_decode($data), 128);//生成密钥位数 1024 bit key
foreach ($plainData as $chunk) {
$str = '';
$decryptionOk = openssl_public_decrypt($chunk, $str, $pu_key);//公钥解密
if ($decryptionOk === false) {
return false;
}
$decrypted .= $str;
}
return $decrypted;
}
//RSA公钥加密
public function publicEncrypt( $data)
{
$encrypted = '';
$pu_key = openssl_pkey_get_public($this->PubKey);
$plainData = str_split($data, 100);
foreach ($plainData as $chunk) {
$partialEncrypted = '';
$encryptionOk = openssl_public_encrypt($chunk, $partialEncrypted, $pu_key);//公钥加密
if ($encryptionOk === false) {
return false;
}
$encrypted .= $partialEncrypted;
}
$encrypted = base64_encode($encrypted);
return $encrypted;
}
//RSA私钥解密
public function privateDecrypt( $data)
{
$decrypted = '';
$pi_key = openssl_pkey_get_private($this->PriKye);
$plainData = str_split(base64_decode($data), 128);
foreach ($plainData as $chunk) {
$str = '';
$decryptionOk = openssl_private_decrypt($chunk, $str, $pi_key);//私钥解密
if ($decryptionOk === false) {
return false;
}
$decrypted .= $str;
}
return $decrypted;
}
/**
* 获取Rsa私钥
*
* @return string
*/
private function _getRsaPriKey ()
{$rsaPriKey = <<可以到 http://web.chacuo.net/netrsakeypair这个网站，在线生成公钥和私钥