OpenSSL 函数
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openssl_public_decrypt

(PHP 4 >= 4.0.6, PHP 5)

openssl_public_decrypt — Decrypts data with public key

说明

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

openssl_public_decrypt() decrypts data that was previous encrypted via openssl_private_encrypt() and stores the result into decrypted.

You can use this function e.g. to check if the message was written by the owner of the private key.

参数

data

decrypted

key

key must be the public key corresponding that was used to encrypt the data.

padding

padding can be one of OPENSSL_PKCS1_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 函数
在线手册：中文 英文
PHP手册
PHP手册 - N: Decrypts data with public key

用户评论:

wfredkNOSPAM at L5DevelopmentNOSPAM dot com (08-Mar-2002 11:52)

Encrypt using private key, decrypt using public key.

Use this for posting signed messages:  Anyone with access to
your public key can read it, but they can't create one with
your signature.

<?php
echo "Source: $source";
$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,$passphrase);
/*
 * NOTE:  Here you use the returned resource value
 */
openssl_private_encrypt($source,$crypttext,$res);
echo "String crypted: $crypttext";

$fp=fopen ("/path/to/certificate.crt","r");
$pub_key=fread($fp,8192);
fclose($fp);
openssl_get_publickey($pub_key);
/*
 * NOTE:  Here you use the $pub_key value (converted, I guess)
 */
openssl_public_decrypt($crypttext,$newsource,$pub_key);
echo "String decrypt : $newsource";
?>

billnet at tiscalinet dot it (28-Jan-2002 06:41)

<?php
$fp=fopen ("/path/to/certificato.pem");
$pub_key=fread ($fp,8192);
openssl_get_publickey ($pub_key);
openssl_public_decrypt ($source,$finaltext,$pub_key);
echo "String decrypt : $finaltext";
?>