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converted sign, verify and fromString to new crypt lib

This commit is contained in:
James Walker 2010-03-12 19:34:45 -05:00
parent 41d2ff662c
commit 23d44c7d59
1 changed files with 31 additions and 55 deletions
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86
plugins/OStatus/classes/Magicsig.php
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@ -40,8 +40,9 @@ class Magicsig extends Memcached_DataObject
public $keypair;
public $alg;
private $_rsa;
private $publicKey;
private $privateKey;
public function __construct($alg = 'RSA-SHA256')
{
$this->alg = $alg;
@ -101,15 +102,7 @@ class Magicsig extends Memcached_DataObject
public function generate($user_id, $key_length = 512)
{
PEAR::pushErrorHandling(PEAR_ERROR_RETURN);
$keypair = new Crypt_RSA_KeyPair($key_length);
$params['public_key'] = $keypair->getPublicKey();
$params['private_key'] = $keypair->getPrivateKey();
$this->_rsa = new Crypt_RSA($params);
PEAR::popErrorHandling();
// @fixme new key generation
$this->user_id = $user_id;
$this->insert();
}
@ -132,8 +125,6 @@ class Magicsig extends Memcached_DataObject
public static function fromString($text)
{
PEAR::pushErrorHandling(PEAR_ERROR_RETURN);
$magic_sig = new Magicsig();
// remove whitespace
@ -144,35 +135,40 @@ class Magicsig extends Memcached_DataObject
return false;
}
$mod = base64_url_decode($matches[1]);
$exp = base64_url_decode($matches[2]);
$mod = $matches[1];
$exp = $matches[2];
if (!empty($matches[4])) {
$private_exp = base64_url_decode($matches[4]);
$private_exp = $matches[4];
} else {
$private_exp = false;
}
$params['public_key'] = new Crypt_RSA_KEY($mod, $exp, 'public');
if ($params['public_key']->isError()) {
$error = $params['public_key']->getLastError();
common_log(LOG_DEBUG, 'RSA Error: '. $error->getMessage());
return false;
}
$magic_sig->loadKey($mod, $exp, 'public');
if ($private_exp) {
$params['private_key'] = new Crypt_RSA_KEY($mod, $private_exp, 'private');
if ($params['private_key']->isError()) {
$error = $params['private_key']->getLastError();
common_log(LOG_DEBUG, 'RSA Error: '. $error->getMessage());
return false;
}
$magic_sig->loadKey($mod, $private_exp, 'private');
}
$magic_sig->_rsa = new Crypt_RSA($params);
PEAR::popErrorHandling();
return $magic_sig;
}
public function loadKey($mod, $exp, $type = 'public')
{
common_log(LOG_DEBUG, "Adding ".$type." key: (".$mod .', '. $exp .")");
$rsa = new Crypt_RSA();
$rsa->signatureMode = CRYPT_RSA_SIGNATURE_PKCS1;
$rsa->setHash('sha256');
$rsa->modulus = new Math_BigInteger(base64_url_decode($mod), 256);
$rsa->k = strlen($rsa->modulus->toBytes());
$rsa->exponent = new Math_BigInteger(base64_url_decode($exp), 256);
if ($type == 'private') {
$this->privateKey = $rsa;
} else {
$this->publicKey = $rsa;
}
}
public function getName()
{
return $this->alg;
@ -190,38 +186,18 @@ class Magicsig extends Memcached_DataObject
public function sign($bytes)
{
$hash = $this->getHash();
$sig = $this->_rsa->createSign($bytes, null, $hash);
if ($this->_rsa->isError()) {
$error = $this->_rsa->getLastError();
common_log(LOG_DEBUG, 'RSA Error: '. $error->getMessage());
return false;
}
return $sig;
$sig = $this->privateKey->sign($bytes);
return base64_url_encode($sig);
}
public function verify($signed_bytes, $signature)
{
$hash = $this->getHash();
$result = $this->_rsa->validateSign($signed_bytes, $signature, null, $hash);
if ($this->_rsa->isError()) {
$error = $this->keypair->getLastError();
common_log(LOG_DEBUG, 'RSA Error: '. $error->getMessage());
return false;
}
return $result;
$signature = base64_url_decode($signature);
return $this->publicKey->verify($signed_bytes, $signature);
}
}
// Define a sha256 function for hashing
// (Crypt_RSA should really be updated to use hash() )
function magicsig_sha256($bytes)
{
return hash('sha256', $bytes);
}
function base64_url_encode($input)
{
return strtr(base64_encode($input), '+/', '-_');