openssl_private_decrypt()

(PHP 4 >= 4.0.6, PHP 5, PHP 7)

使用私钥解密数据

说明

openssl_private_decrypt(string $data,string &$decrypted, mixed $key[,int $padding= OPENSSL_PKCS1_PADDING]): bool

本函数并不会生成安全加密的值，不应用于加密用途。若需要安全加密的值，考虑使用openssl_random_pseudo_bytes()。

openssl_private_decrypt()解密先前通过openssl_public_encrypt()函数加密的$data并将结果保存至$decrypted变量中。

你可以用该函数来解密只对你可用的数据。

参数

$data

$decrypted

$key

$key必须是和用来加密数据所用公钥对应的私钥。

$padding

$padding可以是如下值：OPENSSL_PKCS1_PADDING,OPENSSL_SSLV23_PADDING,OPENSSL_PKCS1_OAEP_PADDING,OPENSSL_NO_PADDING.

返回值

成功时返回TRUE，或者在失败时返回FALSE。

参见

• openssl_public_encrypt()使用公钥加密数据
• openssl_public_decrypt()使用公钥解密数据

Encrypt using public key, decrypt using private key.
Use this to store stuff in your database: Unless someone
has your private key, the database contents are useless.
Also, use this for sending to a specific individual: Get
their public key, encrypt the message, only they can use
their private key to decode it.
<?php
echo "Source: $source";
$fp=fopen("/path/to/certificate.crt","r");
$pub_key=fread($fp,8192);
fclose($fp);
openssl_get_publickey($pub_key);
/*
 * NOTE: Here you use the $pub_key value (converted, I guess)
 */
openssl_public_encrypt($source,$crypttext,$pub_key);
echo "String crypted: $crypttext";
$fp=fopen("/path/to/private.key","r");
$priv_key=fread($fp,8192);
fclose($fp);
// $passphrase is required if your key is encoded (suggested)
$res = openssl_get_privatekey($priv_key,$passphrase);
/*
 * NOTE: Here you use the returned resource value
 */
openssl_private_decrypt($crypttext,$newsource,$res);
echo "String decrypt : $newsource";
?>

of course you have to add the openssl extension to you php environment.