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harden security

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zotlabs 2017-04-02 16:40:36 -07:00
parent 810d9e21bc
commit 044067f055
1 changed files with 29 additions and 13 deletions
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42
include/crypto.php
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@ -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);
@ -67,17 +68,6 @@ 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) {
$key = substr($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($iv,16,"\0"));
}
function STD_decrypt($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($iv,16,"\0"));
}
function AES256CTR_encrypt($data,$key,$iv) {
$key = substr($key,0,32);
@ -92,6 +82,19 @@ function AES256CTR_decrypt($data,$key,$iv) {
}
function CAMELLIA256CFB_encrypt($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);
@ -104,6 +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';
@ -155,14 +172,13 @@ function other_encapsulate($data,$pubkey,$alg) {
function crypto_methods() {
// '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 = [ 'aes256ctr', 'std', 'aes256cbc', 'aes128cbc', 'cast5cbc' ];
$r = [ 'aes256ctr', 'camellia256cfb', 'cast5cfb', 'aes256cbc', 'aes128cbc', 'cast5cbc' ];
call_hooks('crypto_methods',$r);
return $r;