openssl_private_encrypt

(PHP 4 >= 4.0.6, PHP 5)

openssl_private_encrypt — Encrypts data with private key

说明

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

openssl_private_encrypt() encrypts data with private key and stores the result into crypted. Encrypted data can be decrypted via openssl_public_decrypt() .

This function can be used e.g. to sign data (or its hash) to prove that it is not written by someone else.

参数

data
crypted
key
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_public_encrypt() - Encrypts data with public key
openssl_public_decrypt() - Decrypts data with public key

用户评论:

[#1] adityasingh at techknowtrends dot com [2012-04-02 21:18:11]

Here is a over simplified version of using the crypt capabilities for getting started:

$res = openssl_pkey_new();

// Get private key
openssl_pkey_export($res, $privkey);

// Get public key
$pubkey = openssl_pkey_get_details($res);
$pubkey = $pubkey["key"];
var_dump($privkey);
var_dump($pubkey);

// get some text from command line to work with
$tocrypt = trim(fgets(STDIN));

// some variables to work with
$encryptedviaprivatekey = ""; //holds text encrypted with the private key
$decryptedviapublickey = ""; // holds text which was decrypted by the public key after being encrypted with the private key, should be same as $tocrypt
$encryptedviapublickey = ""; // holds text that was encrypted with the public key
$decryptedviaprivatekey = ""; // holds text that was decrypted with the private key after being encrypted with the public key, should be the same as $tocrypt

openssl_private_encrypt($tocrypt, $encryptedviaprivatekey, $privkey);
echo $tocrypt . "->" . $encryptedviaprivatekey;
echo "\n\n";
openssl_public_decrypt($encryptedviaprivatekey, $decryptedviapublickey, $pubkey);
echo $encryptedviaprivatekey . "->" . $decryptedviapublickey;
echo "\n\n";

openssl_public_encrypt($tocrypt,$encryptedviapublickey, $pubkey);
echo $tocrypt . "->" . $encryptedviapublickey;
echo "\n\n";
openssl_private_decrypt($encryptedviapublickey, $decryptedviaprivatekey, $privkey);
echo $encryptedviapublickey . "->" . $decryptedviaprivatekey;

Output:

string(887) "-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----
"
string(272) "-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCy745x8AqGKlTWBu2Ub80boPaQ
xo/midZ4LHZ0zbPpiCAfkADNVYSe8OckPKutdjPX7SNAx66PgQRH1xrz1gysbRrf
8K/mA0LQ00MKBFaFottWt5cCIaUS9zvCgPw7prwng3hkGShnvTSMXiKFyt1E3RTv
pXRk0u46D6hKiy+TSQIDAQAB
-----END PUBLIC KEY-----
"
this is a test for crypting
( ?E@n?u?7F???+-M???k?7?;t?8[j??r???-T?++?YG?-????}9+k8OJn_??x??
d??+a??v.c??-?`,????5u?p%Z????I?? ?

( ?E@n?u?7F???+-M???k?7?;t?8[j??r???-T?++?YG?-????}9+k8OJn_??x??
d??+a??v.c??-?`,????5u?p%Z????I?? ?->this is a test for crypting

this is a test for crypting->hT!?_
#+?-????o???Ss+??Sn??-(??Ikl[???=?????+Uy??N,=b=+?T??meNo?A~???t???@????SV5??*????U?oP?Fq
-? O{????|,?IN)+_-?F+*?{|??G-???/????"PFL

hT!?_
#+?-????o???Ss+??Sn??-(??Ikl[???=?????+Uy??N,=b=+?T??meNo?A~???t???@????SV5??*????U?oP?Fq
-? O{????|,?IN)+_-?F+*?{|??G-???/????"PFL->this is a test for crypting

[#2] wfredkNOSPAM at L5DevelopmentNOSPAM dot com [2002-03-08 15:50:14]

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,$passphrase); openssl_private_encrypt($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); openssl_public_decrypt($crypttext,$newsource,$pub_key); echo "String decrypt : $newsource"; ?>

[#3] billnet at tiscalinet dot it [2002-01-28 10:47:59]

<?php $fp=fopen ("/path/to/key.pem","r"); $priv_key=fread ($fp,8192); fclose($fp); openssl_get_privatekey ($priv_key); openssl_private_encrypt($source,$finaltext,$priv_key); echo "String crypted: $finaltext"; ?>

CIAO !