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✅ Unit Test for HTTPSig.

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This commit is contained in:
Klaus Weidenbach
2018-02-15 00:01:11 +01:00
parent 029d155a07
commit 7c28a40c3e
2 changed files with 212 additions and 30 deletions
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117
Zotlabs/Web/HTTPSig.php
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@@ -3,16 +3,24 @@
namespace Zotlabs\Web;
/**
* Implements HTTP Signatures per draft-cavage-http-signatures-07
* @brief Implements HTTP Signatures per draft-cavage-http-signatures-07.
*
* @see https://tools.ietf.org/html/draft-cavage-http-signatures-07
*/
class HTTPSig {
// See RFC5843
static function generate_digest($body,$set = true) {
$digest = base64_encode(hash('sha256',$body,true));
/**
* @brief RFC5843
*
* @see https://tools.ietf.org/html/rfc5843
*
* @param string $body The value to create the digest for
* @param boolean $set (optional, default true)
* If set send a Digest HTTP header
* @return string The generated digest of $body
*/
static function generate_digest($body, $set = true) {
$digest = base64_encode(hash('sha256', $body, true));
if($set) {
header('Digest: SHA-256=' . $digest);
@@ -40,6 +48,7 @@ class HTTPSig {
if(is_array($data) && $data['header']) {
if(! $data['success'])
return $result;
$h = new \Zotlabs\Web\HTTPHeaders($data['header']);
$headers = $h->fetcharr();
$body = $data['body'];
@@ -47,7 +56,7 @@ class HTTPSig {
else {
$headers = [];
$headers['(request-target)'] =
$headers['(request-target)'] =
strtolower($_SERVER['REQUEST_METHOD']) . ' ' .
$_SERVER['REQUEST_URI'];
foreach($_SERVER as $k => $v) {
@@ -78,7 +87,7 @@ class HTTPSig {
$result['header_signed'] = true;
$signed_headers = $sig_block['headers'];
if(! $signed_headers)
if(! $signed_headers)
$signed_headers = [ 'date' ];
$signed_data = '';
@@ -131,7 +140,7 @@ class HTTPSig {
if($digest[0] === 'SHA-512')
$hashalg = 'sha512';
// The explode operation will have stripped the '=' padding, so compare against unpadded base64
// The explode operation will have stripped the '=' padding, so compare against unpadded base64
if(rtrim(base64_encode(hash($hashalg,$body,true)),'=') === $digest[1]) {
$result['content_valid'] = true;
}
@@ -146,7 +155,7 @@ class HTTPSig {
if($digest[0] === 'SHA-512')
$hashalg = 'sha512';
// The explode operation will have stripped the '=' padding, so compare against unpadded base64
// The explode operation will have stripped the '=' padding, so compare against unpadded base64
if(rtrim(base64_encode(hash($hashalg,$_POST['data'],true)),'=') === $digest[1]) {
$result['content_valid'] = true;
}
@@ -155,9 +164,15 @@ class HTTPSig {
logger('Content_Valid: ' . (($result['content_valid']) ? 'true' : 'false'));
return $result;
}
/**
* @brief
*
* @param string $id
* @return boolean|string
* false if no pub key found, otherwise return the pub key
*/
function get_activitypub_key($id) {
if(strpos($id,'acct:') === 0) {
@@ -180,19 +195,33 @@ class HTTPSig {
$j = json_decode($r,true);
if($j['id'] !== $id)
return false;
return false;
if(array_key_exists('publicKey',$j) && array_key_exists('publicKeyPem',$j['publicKey'])) {
return($j['publicKey']['publicKeyPem']);
}
}
return false;
}
static function create_sig($request,$head,$prvkey,$keyid = 'Key',$send_headers = false,$auth = false,$alg = 'sha256',
$crypt_key = null, $crypt_algo = 'aes256ctr') {
/**
* @brief
*
* @param string $request
* @param array $head
* @param string $prvkey
* @param string $keyid (optional, default 'Key')
* @param boolean $send_headers (optional, default false)
* If set send a HTTP header
* @param boolean $auth (optional, default false)
* @param string $alg (optional, default 'sha256')
* @param string $crypt_key (optional, default null)
* @param string $crypt_algo (optional, default 'aes256ctr')
* @return array
*/
static function create_sig($request, $head, $prvkey, $keyid = 'Key', $send_headers = false, $auth = false,
$alg = 'sha256', $crypt_key = null, $crypt_algo = 'aes256ctr') {
$return_headers = [];
@@ -212,7 +241,7 @@ class HTTPSig {
$x = crypto_encapsulate($headerval,$crypt_key,$crypt_algo);
$headerval = 'iv="' . $x['iv'] . '",key="' . $x['key'] . '",alg="' . $x['alg'] . '",data="' . $x['data'] . '"';
}
if($auth) {
$sighead = 'Authorization: Signature ' . $headerval;
}
@@ -236,12 +265,20 @@ class HTTPSig {
else {
$return_headers[] = $sighead;
}
return $return_headers;
}
static function sign($request,$head,$prvkey,$alg = 'sha256') {
/**
* @brief
*
* @param string $request
* @param array $head
* @param string $prvkey
* @param string $alg (optional) default 'sha256'
* @return array
*/
static function sign($request, $head, $prvkey, $alg = 'sha256') {
$ret = [];
@@ -250,27 +287,38 @@ class HTTPSig {
if($request) {
$headers = '(request-target)' . ': ' . trim($request) . "\n";
$fields = '(request-target)';
}
}
if($head) {
foreach($head as $k => $v) {
$headers .= strtolower($k) . ': ' . trim($v) . "\n";
if($fields)
$fields .= ' ';
$fields .= strtolower($k);
}
// strip the trailing linefeed
$headers = rtrim($headers,"\n");
}
$sig = base64_encode(rsa_sign($headers,$prvkey,$alg));
$sig = base64_encode(rsa_sign($headers,$prvkey,$alg));
$ret['headers'] = $fields;
$ret['signature'] = $sig;
return $ret;
}
/**
* @brief
*
* @param string $header
* @return array associate array with
* - \e string \b keyID
* - \e string \b algorithm
* - \e array \b headers
* - \e string \b signature
*/
static function parse_sigheader($header) {
$ret = [];
@@ -297,12 +345,23 @@ class HTTPSig {
}
static function decrypt_sigheader($header,$prvkey = null) {
/**
* @brief
*
* @param string $header
* @param string $prvkey (optional), if not set use site private key
* @return array|string associative array, empty string if failue
* - \e string \b iv
* - \e string \b key
* - \e string \b alg
* - \e string \b data
*/
static function decrypt_sigheader($header, $prvkey = null) {
$iv = $key = $alg = $data = null;
if(! $prvkey) {
$prvkey = get_config('system','prvkey');
$prvkey = get_config('system', 'prvkey');
}
$matches = [];
@@ -319,10 +378,8 @@ class HTTPSig {
if($iv && $key && $alg && $data) {
return crypto_unencapsulate([ 'iv' => $iv, 'key' => $key, 'alg' => $alg, 'data' => $data ] , $prvkey);
}
return '';
return '';
}
}