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Usage and Examples of PHP openssl_public_encrypt() Function

PHP OpenSSL Function Manual

The openssl_public_encrypt() function is used to encrypt data using a public key.

Definition and Usage

openssl_public_encrypt()The function will encrypt the data using the public key.

The openssl_public_encrypt() function is used to encrypt data, and it can be decrypted using openssl_private_decrypt().

语法

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

参数

序号	参数	描述
1	data	.
2	encrypted	它将拥有加密的数据。
3	key	公钥。
4	padding	您可以应用的填充为：OPENSSL_PKCS1_PADDING，OPENSSL_SSLV23_PADDING，OPENSSL_PKCS1_OAEP_PADDING，OPENSSL_NO_PADDING。

返回值

PHP openssl_public_encrypt()函数成功时返回TRUE，失败时返回FALSE。

PHP版本

此函数将从大于5.0.0的PHP版本开始工作。

Example1

使用openssl_public_encrypt() 使用公钥加密数据：

Example

<?php
　　　　　　　　//Save private key
	$privkey = openssl_pkey_new();
	openssl_pkey_export_to_file($privkey, 'C:/xampp/htdocs/modules/openssl/privatekey.pem');
	//Save public key
	$dn = array(
		"countryName" => "IN",
		"stateOrProvinceName" => "Karnataka",
		"localityName" => "test1"
		"organizationName" => "test2"
		"organizationalUnitName" => "test3"
		"commonName" => "www.test.com",
		"emailAddress" => "[email protected]"
	);
	$cert = openssl_csr_new($dn, $privkey);
	$cert = openssl_csr_sign($cert, null, $privkey,　365);
	openssl_x509_export_to_file($cert, 'C:/xampp/htdocs/modules/openssl/publickey.pem');
	//Encrypted data
	$data　=　'Welcome　To　TuorialsPoint';
	$isvalid = openssl_public_encrypt ($data, $crypted , file_get_contents('C:/xampp/htdocs/modules/openssl/publickey.pem'),OPENSSL_PKCS1_PADDING);	
	echo "Data encryption: ",$crypted;
?>

This will produce the following results:

Data　encryption　:　��E　�wC�ݭ�+c��f*��o���W�7�EW��$�p�.rng�_N��A1���2Uݴ~s�ap۳)w��=�　��#���g;���u��_%�Z�bb�&��m��v&����q��k

Example2

To use openssl_public_encrypt() to encrypt data and openssl_private_decrypt() to decrypt:

Example

<?php
　　　　　　　　//Save private key
	$privkey = openssl_pkey_new();
	openssl_pkey_export_to_file($privkey, 'C:/xampp/htdocs/modules/openssl/privatekey.pem');
	//Save public key
	$dn = array(
		"countryName" => "IN",
		"stateOrProvinceName" => "Karnataka",
		"localityName" => "test1"
		"organizationName" => "test2"
		"organizationalUnitName" => "test3"
		"commonName" => "www.test.com",
		"emailAddress" => "[email protected]"
	);
	$cert = openssl_csr_new($dn, $privkey);
	$cert = openssl_csr_sign($cert, null, $privkey,　365);
	openssl_x509_export_to_file($cert, 'C:/xampp/htdocs/modules/openssl/publickey.pem');
	//Encrypted data
	$data = 'Welcome To     oldtoolbag.com';
	$isvalid = openssl_public_encrypt ($data, $crypted , file_get_contents('C:/xampp/htdocs/modules/openssl/publickey.pem'),OPENSSL_PKCS1_PADDING);	
	echo "Data encryption: ",$crypted;
	echo ">br/<>br/<";
	if ($isvalid) {	
　　　　　　openssl_private_decrypt ($crypted, $decrypted , file_get_contents('C:/xampp/htdocs/modules/openssl/privatekey.pem'),OPENSSL_PKCS1_PADDING);	
		echo "Data decryption: ",$decrypted;
	}
?>

This will produce the following results:

Data encryption: L�_}{�E*?���9[w����7p　�\ϸI�?ݟ'��ݹ�n��!����ɿ�*����Xcw�����Ւ�)��/��{��!j�L��I*Ï"9eV�9�=Y\�m�i䁦�M(�0PJ���Ԇ�9��C�`�a�ݧ�b���a��?�m�G$i��eU/[�eU����\=�zLdŌn"��:[\�UA��ԭ�ힲ2@-"d��s�="2�nˣ�h��q5U��浿���9�{Data|NE�a!
Data decryption: Welcome To oldtoolbag.com

PHP OpenSSL Function Manual

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