From a76ad1478fb8cbc7914e94a24c7942de429c8445 Mon Sep 17 00:00:00 2001
From: zotlabs <mike@macgirvin.com>
Date: Sun, 2 Apr 2017 16:44:44 -0700
Subject: crypto updates

---
 boot.php           |  3 ---
 include/crypto.php | 44 +++++++++++++++++++++++++++++++++++---------
 include/zot.php    |  3 ---
 3 files changed, 35 insertions(+), 15 deletions(-)

diff --git a/boot.php b/boot.php
index 57f41894d..52b1113c1 100755
--- a/boot.php
+++ b/boot.php
@@ -619,9 +619,6 @@ function sys_boot() {
 		define( 'DEFAULT_NOTIFY_ICON', '/images/hz-white-32.png' );
 	}
 
-	if(! defined('CRYPTO_ALGORITHM')) {
-		define( 'CRYPTO_ALGORITHM', 'aes256cbc' );
-	}
 
 	/*
 	 * Try to open the database;
diff --git a/include/crypto.php b/include/crypto.php
index f75390985..2c5545e9b 100644
--- a/include/crypto.php
+++ b/include/crypto.php
@@ -55,6 +55,7 @@ function AES256CBC_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 AES128CBC_encrypt($data,$key,$iv) {
 	$key = substr($key,0,16);
 	$iv = substr($iv,0,16);
@@ -67,18 +68,33 @@ function AES128CBC_decrypt($data,$key,$iv) {
 	return openssl_decrypt($data,'aes-128-cbc',str_pad($key,16,"\0"),OPENSSL_RAW_DATA,str_pad($iv,16,"\0"));
 }
 
-function STD_encrypt($data,$key,$iv) {
+
+function AES256CTR_encrypt($data,$key,$iv) {
 	$key = substr($key,0,32);
 	$iv = substr($iv,0,16);
-	return openssl_encrypt($data,'aes-256-cbc',str_pad($key,32,"\0"),OPENSSL_RAW_DATA,str_pad($iv,16,"\0"));
+	return openssl_encrypt($data,'aes-256-ctr',str_pad($key,32,"\0"),OPENSSL_RAW_DATA,str_pad($iv,16,"\0"));
 }
 
-function STD_decrypt($data,$key,$iv) {
+function AES256CTR_decrypt($data,$key,$iv) {
 	$key = substr($key,0,32);
 	$iv = substr($iv,0,16);
-	return openssl_decrypt($data,'aes-256-cbc',str_pad($key,32,"\0"),OPENSSL_RAW_DATA,str_pad($iv,16,"\0"));
+	return openssl_decrypt($data,'aes-256-ctr',str_pad($key,32,"\0"),OPENSSL_RAW_DATA,str_pad($iv,16,"\0"));
+}
+
+
+function CAMELLIA256CFB_encrypt($data,$key,$iv) {
+	$key = substr($key,0,32);
+	$iv = substr($iv,0,16);
+	return openssl_encrypt($data,'camellia-256-cfb',str_pad($key,32,"\0"),OPENSSL_RAW_DATA,str_pad($iv,16,"\0"));
+}
+
+function CAMELLIA256CFB_decrypt($data,$key,$iv) {
+	$key = substr($key,0,32);
+	$iv = substr($iv,0,16);
+	return openssl_decrypt($data,'camellia-256-cfb',str_pad($key,32,"\0"),OPENSSL_RAW_DATA,str_pad($iv,16,"\0"));
 }
 
+
 function CAST5CBC_encrypt($data,$key,$iv) {
 	$key = substr($key,0,16);
 	$iv = substr($iv,0,8);
@@ -91,6 +107,20 @@ function CAST5CBC_decrypt($data,$key,$iv) {
 	return openssl_decrypt($data,'cast5-cbc',str_pad($key,16,"\0"),OPENSSL_RAW_DATA,str_pad($iv,8,"\0"));
 }
 
+function CAST5CFB_encrypt($data,$key,$iv) {
+	$key = substr($key,0,16);
+	$iv = substr($iv,0,8);
+	return openssl_encrypt($data,'cast5-cfb',str_pad($key,16,"\0"),OPENSSL_RAW_DATA,str_pad($iv,8,"\0"));
+}
+
+function CAST5CFB_decrypt($data,$key,$iv) {
+	$key = substr($key,0,16);
+	$iv = substr($iv,0,8);
+	return openssl_decrypt($data,'cast5-cfb',str_pad($key,16,"\0"),OPENSSL_RAW_DATA,str_pad($iv,8,"\0"));
+}
+
+
+
 function crypto_encapsulate($data,$pubkey,$alg='aes256cbc') {
 	$fn = strtoupper($alg) . '_encrypt';
 	
@@ -142,17 +172,13 @@ 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
 	// particular implementation or choice of underlying implementations based on the key/iv length. 
 	// 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' ];
+	$r = [ 'aes256ctr', 'camellia256cfb', 'cast5cfb', 'aes256cbc', 'aes128cbc', 'cast5cbc' ];
 	call_hooks('crypto_methods',$r);
 	return $r;
 
diff --git a/include/zot.php b/include/zot.php
index 8a2178913..b3999920f 100644
--- a/include/zot.php
+++ b/include/zot.php
@@ -165,9 +165,6 @@ function zot_build_packet($channel, $type = 'notify', $recipients = null, $remot
 
 function zot_best_algorithm($methods) {
 
-	if(\Zotlabs\Lib\System::get_server_role() !== 'pro')
-		return 'aes256cbc';
-
 	$x = [ 'methods' => $methods, 'result' => '' ];
 	call_hooks('zot_best_algorithm',$x);
 	if($x['result'])
-- 
cgit v1.2.3