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Magicsig::generate is now static

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This also fixes a problem with "initial salmon slap", which was a
problem for newly registered accounts which would have their first
salmon slap fail to distribute since there was a problem with Magicsig
keys. Apparently we have to re-read them with importKeys so the
Crypt_RSA objects publicKey and privateKey match later instances of them.

I think it may have been that generate() doesn't specify a signatureMode,
but I leave experimentation of that to the future.
This commit is contained in:
Mikael Nordfeldth 2014-06-02 21:50:40 +02:00
parent 537dff7987
commit 0bc122ff58
3 changed files with 40 additions and 32 deletions
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4
plugins/OStatus/OStatusPlugin.php
View File

@ -1344,9 +1344,7 @@ class OStatusPlugin extends Plugin
// Get this profile's keypair
$magicsig = Magicsig::getKV('user_id', $target->id);
if (!$magicsig instanceof Magicsig && $target->isLocal()) {
// No keypair yet, let's generate one. Only for local users.
$magicsig = new Magicsig();
$magicsig->generate($target->getUser());
$magicsig = Magicsig::generate($target->getUser());
}
if ($magicsig instanceof Magicsig) {

23
plugins/OStatus/classes/Magicsig.php
View File

@ -132,7 +132,7 @@ class Magicsig extends Managed_DataObject
*/
function insert()
{
$this->keypair = $this->toString();
$this->keypair = $this->toString(true);
return parent::insert();
}
@ -145,20 +145,25 @@ class Magicsig extends Managed_DataObject
*
* @param User $user the local user (since we don't have remote private keys)
*/
public function generate(User $user, $bits=1024)
public static function generate(User $user, $bits=1024, $alg='RSA-SHA256')
{
$magicsig = new Magicsig($alg);
$magicsig->user_id = $user->id;
$rsa = new Crypt_RSA();
$keypair = $rsa->createKey($bits);
$this->privateKey = new Crypt_RSA();
$this->privateKey->loadKey($keypair['privatekey']);
$magicsig->privateKey = new Crypt_RSA();
$magicsig->privateKey->loadKey($keypair['privatekey']);
$this->publicKey = new Crypt_RSA();
$this->publicKey->loadKey($keypair['publickey']);
$magicsig->publicKey = new Crypt_RSA();
$magicsig->publicKey->loadKey($keypair['publickey']);
$this->user_id = $user->id;
$this->insert();
$magicsig->insert(); // will do $this->keypair = $this->toString(true);
$magicsig->importKeys(); // seems it's necessary to re-read keys from text keypair
return $magicsig;
}
/**
@ -172,7 +177,7 @@ class Magicsig extends Managed_DataObject
$mod = Magicsig::base64_url_encode($this->publicKey->modulus->toBytes());
$exp = Magicsig::base64_url_encode($this->publicKey->exponent->toBytes());
$private_exp = '';
if ($full_pair && $this->privateKey->exponent->toBytes()) {
if ($full_pair && $this->privateKey instanceof Crypt_RSA && $this->privateKey->exponent->toBytes()) {
$private_exp = '.' . Magicsig::base64_url_encode($this->privateKey->exponent->toBytes());
}

45
plugins/OStatus/lib/magicenvelope.php
View File

@ -153,21 +153,23 @@ class MagicEnvelope
* @param <type> $text
* @param <type> $mimetype
* @param Magicsig $magicsig Magicsig with private key available.
*
* @return MagicEnvelope object with all properties set
*
* @throws Exception of various kinds on signing failure
*/
public static function signMessage($text, $mimetype, Magicsig $magicsig)
public function signMessage($text, $mimetype, Magicsig $magicsig)
{
$magic_env = new MagicEnvelope();
assert($magicsig->privateKey instanceof Crypt_RSA);
// Prepare text and metadata for signing
$magic_env->data = Magicsig::base64_url_encode($text);
$magic_env->data_type = $mimetype;
$magic_env->encoding = self::ENCODING;
$magic_env->alg = $magicsig->getName();
// Get the actual signature
$magic_env->sig = $magicsig->sign($magic_env->signingText());
$this->data = Magicsig::base64_url_encode($text);
$this->data_type = $mimetype;
$this->encoding = self::ENCODING;
$this->alg = $magicsig->getName();
return $magic_env;
// Get the actual signature
$this->sig = $magicsig->sign($this->signingText());
}
/**
@ -182,7 +184,7 @@ class MagicEnvelope
$xs->element('me:data', array('type' => $this->data_type), $this->data);
$xs->element('me:encoding', null, $this->encoding);
$xs->element('me:alg', null, $this->alg);
$xs->element('me:sig', null, $this->sig);
$xs->element('me:sig', null, $this->getSignature());
$xs->elementEnd('me:env');
$string = $xs->getString();
@ -220,7 +222,7 @@ class MagicEnvelope
$prov->appendChild($enc);
$alg = $dom->createElementNS(self::NS, 'me:alg', $this->alg);
$prov->appendChild($alg);
$sig = $dom->createElementNS(self::NS, 'me:sig', $this->sig);
$sig = $dom->createElementNS(self::NS, 'me:sig', $this->getSignature());
$prov->appendChild($sig);
$dom->documentElement->appendChild($prov);
@ -231,6 +233,11 @@ class MagicEnvelope
return $dom;
}
public function getSignature()
{
return $this->sig;
}
/**
* Find the author URI referenced in the payload Atom entry.
*
@ -280,7 +287,7 @@ class MagicEnvelope
return false;
}
return $magicsig->verify($this->signingText(), $this->sig);
return $magicsig->verify($this->signingText(), $this->getSignature());
}
/**
@ -326,24 +333,22 @@ class MagicEnvelope
* @param string $text XML fragment to sign, assumed to be Atom
* @param User $user User who cryptographically signs $text
*
* @return string XML string representation of magic envelope
* @return MagicEnvelope object complete with signature
*
* @throws Exception on bad profile input or key generation problems
* @fixme if signing fails, this seems to return the original text without warning. Is there a reason for this?
*/
public static function signAsUser($text, User $user)
{
// Find already stored key
$magicsig = Magicsig::getKV('user_id', $user->id);
if (!$magicsig instanceof Magicsig) {
// No keypair yet, let's generate one.
$magicsig = new Magicsig();
$magicsig->generate($user);
$magicsig = Magicsig::generate($user);
}
assert($magicsig instanceof Magicsig);
assert($magicsig->privateKey instanceof Crypt_RSA);
$magic_env = self::signMessage($text, 'application/atom+xml', $magicsig);
assert($magic_env instanceof MagicEnvelope);
$magic_env = new MagicEnvelope();
$magic_env->signMessage($text, 'application/atom+xml', $magicsig);
return $magic_env;
}