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use aes-ctr which is slightly/arguably better than a poke in the eye and don't restrict the crypto algorithm by server role.

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zotlabs
2017-04-01 15:30:59 -07:00
parent 7256579c16
commit 810d9e21bc
3 changed files with 7 additions and 20 deletions
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17
include/crypto.php
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@@ -79,16 +79,16 @@ function STD_decrypt($data,$key,$iv) {
return openssl_decrypt($data,'aes-256-cbc',str_pad($key,32,"\0"),OPENSSL_RAW_DATA,str_pad($iv,16,"\0"));
}
function AES256GCM_encrypt($data,$key,$iv) {
function AES256CTR_encrypt($data,$key,$iv) {
$key = substr($key,0,32);
$iv = substr($iv,0,12);
return openssl_encrypt($data,'aes-256-gcm',str_pad($key,32,"\0"),OPENSSL_RAW_DATA,str_pad($iv,12,"\0"));
$iv = substr($iv,0,16);
return openssl_encrypt($data,'aes-256-ctr',str_pad($key,32,"\0"),OPENSSL_RAW_DATA,str_pad($iv,16,"\0"));
}
function AES256GCM_decrypt($data,$key,$iv) {
function AES256CTR_decrypt($data,$key,$iv) {
$key = substr($key,0,32);
$iv = substr($iv,0,12);
return openssl_decrypt($data,'aes-256-gcm',str_pad($key,32,"\0"),OPENSSL_RAW_DATA,str_pad($iv,12,"\0"));
$iv = substr($iv,0,16);
return openssl_decrypt($data,'aes-256-ctr',str_pad($key,32,"\0"),OPENSSL_RAW_DATA,str_pad($iv,16,"\0"));
}
@@ -155,9 +155,6 @@ function other_encapsulate($data,$pubkey,$alg) {
function crypto_methods() {
if(\Zotlabs\Lib\System::get_server_role() !== 'pro')
return [ 'aes256cbc' ];
// 'std' is the new project standard which is aes256cbc but transmits/receives 256-byte key and iv.
// aes256cbc is provided for compatibility with earlier zot implementations which assume 32-byte key and 16-byte iv.
// other_encapsulate() now produces these longer keys/ivs by default so that it is difficult to guess a
@@ -165,7 +162,7 @@ function crypto_methods() {
// The actual methods are responsible for deriving the actual key/iv from the provided parameters;
// possibly by truncation or segmentation - though many other methods could be used.
$r = [ 'std', 'aes256cbc', 'aes128cbc', 'cast5cbc' ];
$r = [ 'aes256ctr', 'std', 'aes256cbc', 'aes128cbc', 'cast5cbc' ];
call_hooks('crypto_methods',$r);
return $r;