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crypto stuff

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This commit is contained in:
Friendika 2011-08-09 18:55:46 -07:00
parent 49be394182
commit 1bfe1283aa
10 changed files with 102 additions and 90 deletions
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54
include/certfns.php → include/crypto.php
View file

@ -1,6 +1,56 @@
<?php
require_once('library/ASNValue.class.php');
require_once('library/asn1.php');
function rsa_sign($data,$key) {
$sig = '';
if (version_compare(PHP_VERSION, '5.3.0', '>=')) {
openssl_sign($data,$sig,$key,'sha256');
}
else {
if(strlen($key) < 1024 || extension_loaded('gmp')) {
require_once('library/phpsec/Crypt/RSA.php');
$rsa = new CRYPT_RSA();
$rsa->signatureMode = CRYPT_RSA_SIGNATURE_PKCS1;
$rsa->setHash('sha256');
$rsa->loadKey($key);
$sig = $rsa->sign($data);
}
else {
logger('rsa_sign: insecure algorithm used. Please upgrade PHP to 5.3');
openssl_private_encrypt(hex2bin('3031300d060960864801650304020105000420') . hash('sha256',$data,true), $sig, $key);
}
}
return $sig;
}
function rsa_verify($data,$sig,$key) {
if (version_compare(PHP_VERSION, '5.3.0', '>=')) {
$verify = openssl_verify($data,$sig,$key,'sha256');
}
else {
if(strlen($key) <= 300 || extension_loaded('gmp')) {
require_once('library/phpsec/Crypt/RSA.php');
$rsa = new CRYPT_RSA();
$rsa->signatureMode = CRYPT_RSA_SIGNATURE_PKCS1;
$rsa->setHash('sha256');
$rsa->loadKey($key);
$verify = $rsa->verify($data,$sig);
}
else {
// fallback sha256 verify for PHP < 5.3 and large key lengths
$rawsig = '';
openssl_public_decrypt($sig,$rawsig,$key);
$verify = (($rawsig && substr($rawsig,-32) === hash('sha256',$data,true)) ? true : false);
}
}
return $verify;
}
function DerToPem($Der, $Private=false)
{
@ -128,3 +178,7 @@ function metorsa($m,$e) {
return $key;
}
function salmon_key($pubkey) {
pemtome($pubkey,$m,$e);
return 'RSA' . '.' . base64url_encode($m,true) . '.' . base64url_encode($e,true) ;
}

25
include/diaspora.php
View file

@ -1,6 +1,6 @@
<?php
require_once('include/certfns.php');
require_once('include/crypto.php');
function receive_return($val) {
@ -83,9 +83,7 @@ function diaspora_msg_build($msg,$user,$contact,$prvkey,$pubkey) {
$signable_data = $data . '.' . base64url_encode($type) . "\n" . '.'
. base64url_encode($encoding) . "\n" . '.' . base64url_encode($alg) . "\n";
$signature = '';
$result = openssl_sign($signable_data,$signature,$prvkey,'SHA256');
$signature = rsa_sign($signable_data,$prvkey);
$sig = base64url_encode($signature);
$decrypted_header = <<< EOT
@ -226,7 +224,7 @@ function diaspora_decode($importer,$xml) {
if(! $author_link) {
logger('mod-diaspora: Could not retrieve author URI.');
receive_return(400);
http_status_exit(400);
}
// Once we have the author URI, go to the web and try to find their public key
@ -239,25 +237,14 @@ function diaspora_decode($importer,$xml) {
if(! $key) {
logger('mod-diaspora: Could not retrieve author key.');
receive_return(400);
http_status_exit(400);
}
$verify = false;
if (version_compare(PHP_VERSION, '5.3.0', '>=')) {
$verify = openssl_verify($signed_data,$signature,$key,'sha256');
}
else {
// fallback sha256 verify for PHP < 5.3
$rawsig = '';
$hash = hash('sha256',$signed_data,true);
openssl_public_decrypt($signature,$rawsig,$key);
$verify = (($rawsig && substr($rawsig,-32) === $hash) ? true : false);
}
$verify = rsa_verify($signed_data,$signature,$key);
if(! $verify) {
logger('mod-diaspora: Message did not verify. Discarding.');
receive_return(400);
http_status_exit(400);
}
logger('mod-diaspora: Message verified.');

14
include/network.php
View file

@ -181,6 +181,20 @@ function xml_status($st, $message = '') {
}}
if(! function_exists('http_status_exit')) {
function http_status_exit($val) {
if($val >= 400)
$err = 'Error';
if($val >= 200 && $val < 300)
$err = 'OK';
logger('http_status_exit ' . $val);
header($_SERVER["SERVER_PROTOCOL"] . ' ' . $val . ' ' . $err);
killme();
}}
// convert an XML document to a normalised, case-corrected array
// used by webfinger

31
include/salmon.php
View file

@ -1,21 +1,7 @@
<?php
require_once('library/asn1.php');
require_once('include/crypto.php');
function salmon_key($pubkey) {
$lines = explode("\n",$pubkey);
unset($lines[0]);
unset($lines[count($lines)]);
$x = base64_decode(implode('',$lines));
$r = ASN_BASE::parseASNString($x);
$m = $r[0]->asnData[1]->asnData[0]->asnData[0]->asnData;
$e = $r[0]->asnData[1]->asnData[0]->asnData[1]->asnData;
return 'RSA' . '.' . $m . '.' . $e ;
}
function get_salmon_key($uri,$keyhash) {
@ -112,24 +98,15 @@ EOT;
$algorithm = 'RSA-SHA256';
$keyhash = base64url_encode(hash('sha256',salmon_key($owner['spubkey'])),true);
// Setup RSA stuff to PKCS#1 sign the data
require_once('library/phpsec/Crypt/RSA.php');
$rsa = new CRYPT_RSA();
$rsa->signatureMode = CRYPT_RSA_SIGNATURE_PKCS1;
$rsa->setHash('sha256');
$rsa->loadKey($owner['sprvkey']);
// precomputed base64url encoding of data_type, encoding, algorithm concatenated with periods
$precomputed = '.YXBwbGljYXRpb24vYXRvbSt4bWw=.YmFzZTY0dXJs.UlNBLVNIQTI1Ng==';
$signature = base64url_encode($rsa->sign(str_replace('=','',$data . $precomputed),true));
$signature = base64url_encode(rsa_sign(str_replace('=','',$data . $precomputed),true),$owner['sprvkey']);
$signature2 = base64url_encode($rsa->sign($data . $precomputed));
$signature2 = base64url_encode(rsa_sign($data . $precomputed),$owner['sprvkey']);
$signature3 = base64url_encode($rsa->sign($data));
$signature3 = base64url_encode(rsa_sign($data),$owner['sprvkey']);
$salmon_tpl = get_markup_template('magicsig.tpl');

6
include/text.php
View file

@ -671,7 +671,7 @@ function smilies($s) {
$a = get_app();
return str_replace(
array( '&lt;3', '&lt;/3', '&lt;\\3', ':-)', ':)', ';-)', ':-(', ':(', ':-P', ':P', ':-"', ':-x', ':-X', ':-D', '8-|', '8-O'),
array( '&lt;3', '&lt;/3', '&lt;\\3', ':-)', ':)', ';-)', ':-(', ':(', ':-P', ':P', ':-"', ':-x', ':-X', ':-D', '8-|', '8-O', '~friendika' ),
array(
'<img src="' . $a->get_baseurl() . '/images/smiley-heart.gif" alt="<3" />',
'<img src="' . $a->get_baseurl() . '/images/smiley-brokenheart.gif" alt="</3" />',
@ -688,7 +688,9 @@ function smilies($s) {
'<img src="' . $a->get_baseurl() . '/images/smiley-kiss.gif" alt=":-X" />',
'<img src="' . $a->get_baseurl() . '/images/smiley-laughing.gif" alt=":-D" />',
'<img src="' . $a->get_baseurl() . '/images/smiley-surprised.gif" alt="8-|" />',
'<img src="' . $a->get_baseurl() . '/images/smiley-surprised.gif" alt="8-O" />'
'<img src="' . $a->get_baseurl() . '/images/smiley-surprised.gif" alt="8-O" />',
'<a href="http://project.friendika.com">~friendika <img src="' . $a->get_baseurl() . '/images/friendika-16.png" alt="~friendika" /></a>',
), $s);
}}