-
-
Save ezimuel/485eb4745b58b30a2435bd92bdffb19f to your computer and use it in GitHub Desktop.
OpenSSL AEAD support in PHP 7.1
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
<?php | |
// Benchmark GCM vs. CCM with PHP 7.1 | |
// Result: GCM is 3x faster than CCM | |
$key = random_bytes(32); | |
$data = random_bytes(1024 * 1024 * 10); // 10 Mb | |
$iv = random_bytes(openssl_cipher_iv_length('aes-256-gcm')); | |
$start = microtime(true); | |
$ciphertext = openssl_encrypt($data, 'aes-256-gcm', $key, OPENSSL_RAW_DATA, $iv, $tag); | |
$gcmTimeEnc = microtime(true) - $start; | |
$start = microtime(true); | |
$decrypt = openssl_decrypt($ciphertext, 'aes-256-gcm', $key, OPENSSL_RAW_DATA, $iv, $tag); | |
$gcmTimeDec = microtime(true) - $start; | |
if ($decrypt !== $data) { | |
throw new Exception("Decryption failed for GCM"); | |
} | |
$iv = random_bytes(openssl_cipher_iv_length('aes-256-ccm')); | |
$start = microtime(true); | |
$ciphertext = openssl_encrypt($data, 'aes-256-ccm', $key, OPENSSL_RAW_DATA, $iv, $tag); | |
$ccmTimeEnc = microtime(true) - $start; | |
$start = microtime(true); | |
$decrypt = openssl_decrypt($ciphertext, 'aes-256-ccm', $key, OPENSSL_RAW_DATA, $iv, $tag); | |
$ccmTimeDec = microtime(true) - $start; | |
if ($decrypt !== $data) { | |
throw new Exception("Decryption failed for CCM"); | |
} | |
printf("GCM (enc): %.4f, GCM (dec): %.4f\n", $gcmTimeEnc, $gcmTimeDec); | |
printf("CCM (enc): %.4f, CCM (dec): %.4f\n", $ccmTimeEnc, $ccmTimeDec); |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
<?php | |
$iv = random_bytes(openssl_cipher_iv_length('aes-256-ccm')); | |
$key = random_bytes(32); | |
$data = random_bytes(1024); | |
// Encryption and authen | |
$ciphertext = openssl_encrypt($data, 'aes-256-ccm', $key, OPENSSL_RAW_DATA, $iv, $tag); | |
// the message is $tag . $ciphertext | |
// Uncomment to alter 1 bit in ciphertext | |
// $i = rand(0, mb_strlen($ciphertext, '8bit') - 1); | |
// $ciphertext[$i] = $ciphertext[$i] ^ chr(1); | |
$decrypt = openssl_decrypt($ciphertext, 'aes-256-ccm', $key, OPENSSL_RAW_DATA, $iv, $tag); | |
if (false === $decrypt) { | |
throw new Exception("Authentication failed!"); | |
} | |
printf ("Decryption %s\n", $data === $decrypt ? 'Ok' : 'Failed'); | |
// Additional authenticated data | |
$aad = 'foo@domain.com'; | |
$ciphertext = openssl_encrypt($data, 'aes-256-ccm', $key, OPENSSL_RAW_DATA, $iv, $tag, $aad); | |
// the message is $aad . $tag . $ciphertext | |
// Uncomment to alter 1 bit in additional authenticated data | |
//$i = rand(0, mb_strlen($aad, '8bit') - 1); | |
//$aad[$i] = $aad[$i] ^ chr(1); | |
$decrypt = openssl_decrypt($ciphertext, 'aes-256-ccm', $key, OPENSSL_RAW_DATA, $iv, $tag, $aad); | |
if (false === $decrypt) { | |
throw new Exception("Authentication failed!"); | |
} | |
printf ("Decryption %s\n", $data === $decrypt ? 'Ok' : 'Failed'); |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
<?php | |
$iv = random_bytes(openssl_cipher_iv_length('aes-256-gcm')); | |
$key = random_bytes(32); | |
$data = random_bytes(1024); | |
// Encryption and authen | |
$ciphertext = openssl_encrypt($data, 'aes-256-gcm', $key, OPENSSL_RAW_DATA, $iv, $tag); | |
// the message is $tag . $ciphertext | |
// Change 1 bit in ciphertext | |
//$i = rand(0, mb_strlen($ciphertext, '8bit') - 1); | |
//$ciphertext[$i] = $ciphertext[$i] ^ chr(1); | |
$decrypt = openssl_decrypt($ciphertext, 'aes-256-gcm', $key, OPENSSL_RAW_DATA, $iv, $tag); | |
if (false === $decrypt) { | |
throw new Exception("Authentication failed!"); | |
} | |
printf ("Decryption %s\n", $data === $decrypt ? 'Ok' : 'Failed'); | |
// Additional authenticated data | |
$aad = 'foo@domain.com'; | |
$ciphertext = openssl_encrypt($data, 'aes-256-gcm', $key, OPENSSL_RAW_DATA, $iv, $tag, $aad); | |
// the message is $aad . $tag . $ciphertext | |
// Change 1 bit in additional authenticated data | |
//$i = rand(0, mb_strlen($aad, '8bit') - 1); | |
//$aad[$i] = $aad[$i] ^ chr(1); | |
$decrypt = openssl_decrypt($ciphertext, 'aes-256-gcm', $key, OPENSSL_RAW_DATA, $iv, $tag, $aad); | |
if (false === $decrypt) { | |
throw new Exception("Authentication failed!"); | |
} | |
printf ("Decryption %s\n", $data === $decrypt ? 'Ok' : 'Failed'); |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment