openssl_private_decrypt

(PHP 4 >= 4.0.6, PHP 5, PHP 7, PHP 8)

openssl_private_decrypt — 使用私钥解密数据

说明

openssl_private_decrypt(
    string $data,
    string &$decrypted_data,
    OpenSSLAsymmetricKey|OpenSSLCertificate|array|string $private_key,
    int $padding = OPENSSL_PKCS1_PADDING
): bool

openssl_private_decrypt() 解密之前通过 openssl_public_encrypt() 加密的 data，并将结果保存至 decrypted_data 中。

可以使用该函数来解密只对个人有效的数据。

参数

data
decrypted_data
private_key: private_key 必须是跟数据加密相对应的私钥。
padding: padding 可以是如下值：OPENSSL_PKCS1_PADDING、OPENSSL_SSLV23_PADDING、OPENSSL_PKCS1_OAEP_PADDING、OPENSSL_NO_PADDING。

更新日志

版本	说明
8.0.0	`private_key` 现在接受 OpenSSLAsymmetricKey 或 OpenSSLCertificate 实例。之前接受 `OpenSSL key` 类型或 `OpenSSL X.509` 类型的 resource。

参见

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

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User Contributed Notes 3 notes

down

wfredkNOSPAM at L5DevelopmentNOSPAM dot com ¶

21 years ago

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";
?>

down

-7

Anonymous ¶

2 years ago

<?php

// Generate keys in console:
// $ openssl genrsa -out private_key 8192
// $ openssl rsa -in private_key -out public_key.pem -pubout -outform PEM

// Test data
$data = 'Hello world';

// Encrypt data with public key
$publicKey = file_get_contents('public_key.pem');
$encrypted = null;

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

echo 'Encrypted data', PHP_EOL;
echo base64_encode($encrypted), PHP_EOL;

echo PHP_EOL;

// Decrypt data with private key
$privateKey = file_get_contents('private_key');
$decrypted = null;

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

echo 'Decrypted data', PHP_EOL;
echo $decrypted, PHP_EOL;

down

-50

tjusongchao at gmail dot com ¶

8 years ago

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

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