README

Crypto

This package can be used to Encrypt, Decrypt and Sign data using Asymmetric algorithms in php.

the below algoritms can be used:

• RSA
• DSA
• DH
• EC

Install

Via Composer

$ composer require shetabit/payment

How to use

here is a simple encoding/decoding example.

$crypto = new Crypto;

// generate private key
$privateKey = $crypto->createPrivateKey();
echo $privateKey;

// generate public key
$publicKey = $crypto->createPublicKey($privateKey);
echo $publicKey;

$data = 'a simple text';

// encrypt, plain data
$encryptedData = $crypto->encrypt($publicKey, $data);
echo $encryptedData;

// decrypt, encrypted data
$decryptedData = $crypto->decrypt($privateKey, $encryptedData);
echo $decryptedData;

Create private key

you can create a private key like the below

$crypt = new Crypt;

$privateKey = $crypt->createPrivateKey();

echo $privatekey;

the below algorithms can be used:

• RSA: use Crypto::OPENSSL_KEYTYPE_RSA
• DSA: use Crypto::OPENSSL_KEYTYPE_DSA (not completely supported by PHP OpenSSL)
• DH: use Crypto::OPENSSL_KEYTYPE_DH (not completely supported by PHP OpenSSL)
• EC: use Crypto::OPENSSL_KEYTYPE_EC (not completely supported by PHP OpenSSL)

$crypt = new Crypt;

$privateKey = $crypt->createPrivateKey(Crypto::OPENSSL_KEYTYPE_RSA);

echo $privatekey;

Create public key:

a public key can be generated using a private key

$privatekey = '-----BEGIN EC PRIVATE KEY-----
MIHuAgEBBEgC1SvKxAMTrXYmC9CV+euaL8KVemuuU6I9A5moUh4HgTzESYt35lgc
CiwMetwIaB9RHFM7869D4rClXvnxFy91nMklcY7IsCmgBwYFK4EEACehgZUDgZIA
BAHBdOduvUMAft3s3xq/70CyHtJTfbFAMmyE6rIOAXYlOcvCvwfLRTbAXkZ+PnU+
5SkSqpC036F02Hr8GNxToie+gLrEAsmjQwLImuN9o+1UPwYR3LdG8N4JsnFkIMYr
qTvrA+usw5pjfZmqE4hHlFVdIaIb7r2m8w2OEZTfsfxQjRzY6uE9P3711NWdZdP2
Rg==
-----END EC PRIVATE KEY-----';

$crypt = new Crypt;

$publicKey = $crypt->createPublicKey($privateKey);

echo $publicKey;

Encrypt data:

• data must be in string format.
• you need a valid public key to encrypt data.

$publicKey = "-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzLBs9Y2+QSr8l5LV8beY
nidHPHhM0/zMy1V7CiTWQyQVyxsZKHQJZGP+zJNovSH+KG9wfUe5XnC7qVDU80Bi
ABfQFhLe+t7w8UnBbRnDxMnLCjoSrtG8ZlJBkfmvTMf4MdmvMUqzqUD+ssB76BOP
Cce7qGntIlhQOzj3crliLex6E4OmwUP9RgPtIz/GQuI+O/XSf6irkkRjE8Sq9J7S
zU7z/asXcSi9PMzql/3Z/K47azWBZJazpSf6rkfVQzsITcai+CaZvVItCrMq7z94
/poX24CX2MgOxWxv8thRG7jO7nNCT5Smc+wi1j3HXaxbnA3vcAt6yQ6ctXpf1rGI
FwIDAQAB
-----END PUBLIC KEY-----";

$data = 'this is a simple text';

$encryptedData = $crypto->encrypt($publicKey, $data);

echo $encryptedData;

Decrypt data:

• you need a valid public key to decrypt data.

$privateKey='private key';

$encryptedData = 'encrypted data';

$decryptedData = $crypto->decrypt($privateKey, $encryptedData);

echo $decryptedData;

Sign data:

• data must be in string format.
• you need a valid public key to sign data.

$privateKey = "-----BEGIN PRIVATE KEY-----
MIHuAgEBBEgC1SvKxAMTrXYmC9CV+euaL8KVemuuU6I9A5moUh4HgTzESYt35lgc
CiwMetwIaB9RHFM7869D4rClXvnxFy91nMklcY7IsCmgBwYFK4EEACehgZUDgZIA
BAHBdOduvUMAft3s3xq/70CyHtJTfbFAMmyE6rIOAXYlOcvCvwfLRTbAXkZ+PnU+
5SkSqpC036F02Hr8GNxToie+gLrEAsmjQwLImuN9o+1UPwYR3LdG8N4JsnFkIMYr
qTvrA+usw5pjfZmqE4hHlFVdIaIb7r2m8w2OEZTfsfxQjRzY6uE9P3711NWdZdP2
Rg==
-----END EC PRIVATE KEY-----";

$data = 'this is a simple text';

$signature = $crypto->sign($privateKey, $data);

echo $signature;

verify signature:

• you need a valid public key to verify data.

$publicKey = "-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzLBs9Y2+QSr8l5LV8beY
nidHPHhM0/zMy1V7CiTWQyQVyxsZKHQJZGP+zJNovSH+KG9wfUe5XnC7qVDU80Bi
ABfQFhLe+t7w8UnBbRnDxMnLCjoSrtG8ZlJBkfmvTMf4MdmvMUqzqUD+ssB76BOP
Cce7qGntIlhQOzj3crliLex6E4OmwUP9RgPtIz/GQuI+O/XSf6irkkRjE8Sq9J7S
zU7z/asXcSi9PMzql/3Z/K47azWBZJazpSf6rkfVQzsITcai+CaZvVItCrMq7z94
/poX24CX2MgOxWxv8thRG7jO7nNCT5Smc+wi1j3HXaxbnA3vcAt6yQ6ctXpf1rGI
FwIDAQAB
-----END PUBLIC KEY-----";

$signature = 'this is a signature';

$verification = $crypto->encrypt($publicKey, $data);

echo $encryptedData ? 'true' : 'false';