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Merge pull request #469 from terrafrost/rsa-xml-unsigned

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RSA: make XML keys use unsigned integers

* terrafrost/rsa-xml-unsigned:
  RSA: syntax error in unit tests
  RSA: make unit tests perform string comparisons sans white space chars
  RSA: update unit test
  RSA: add unit test
  RSA: make XML keys use unsigned integers
This commit is contained in:
Andreas Fischer 2014-09-09 16:41:58 +02:00
commit 3f3b9b90fb
2 changed files with 55 additions and 10 deletions
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23
phpseclib/Crypt/RSA.php
View File

@ -742,17 +742,18 @@ class Crypt_RSA
*/
function _convertPrivateKey($n, $e, $d, $primes, $exponents, $coefficients)
{
$signed = $this->privateKeyFormat != CRYPT_RSA_PRIVATE_FORMAT_XML;
$num_primes = count($primes);
$raw = array(
'version' => $num_primes == 2 ? chr(0) : chr(1), // two-prime vs. multi
'modulus' => $n->toBytes(true),
'publicExponent' => $e->toBytes(true),
'privateExponent' => $d->toBytes(true),
'prime1' => $primes[1]->toBytes(true),
'prime2' => $primes[2]->toBytes(true),
'exponent1' => $exponents[1]->toBytes(true),
'exponent2' => $exponents[2]->toBytes(true),
'coefficient' => $coefficients[2]->toBytes(true)
'modulus' => $n->toBytes($signed),
'publicExponent' => $e->toBytes($signed),
'privateExponent' => $d->toBytes($signed),
'prime1' => $primes[1]->toBytes($signed),
'prime2' => $primes[2]->toBytes($signed),
'exponent1' => $exponents[1]->toBytes($signed),
'exponent2' => $exponents[2]->toBytes($signed),
'coefficient' => $coefficients[2]->toBytes($signed)
);
// if the format in question does not support multi-prime rsa and multi-prime rsa was used,
@ -941,8 +942,10 @@ class Crypt_RSA
*/
function _convertPublicKey($n, $e)
{
$modulus = $n->toBytes(true);
$publicExponent = $e->toBytes(true);
$signed = $this->publicKeyFormat != CRYPT_RSA_PUBLIC_FORMAT_XML;
$modulus = $n->toBytes($signed);
$publicExponent = $e->toBytes($signed);
switch ($this->publicKeyFormat) {
case CRYPT_RSA_PUBLIC_FORMAT_RAW:

42
tests/Unit/Crypt/RSA/LoadKeyTest.php
View File

@ -259,4 +259,46 @@ Ao8eayMp6FcvNucIpUndo1X8dKMv3Y26ZQIDAQAB
$this->assertGreaterThanOrEqual(1, strlen("$rsa"));
$this->assertFalse($rsa->getPublicKey());
}
/**
* make phpseclib generated XML keys be unsigned. this may need to be reverted
* if it is later learned that XML keys are, in fact, supposed to be signed
* @group github468
*/
public function testUnsignedXML()
{
$rsa = new Crypt_RSA();
$key = '<RSAKeyValue>
<Modulus>v5OxcEgxPUfa701NpxnScCmlRkbwSGBiTWobHkIWZEB+AlRTHaVoZg/D8l6YzR7VdQidG6gF+nuUMjY75dBXgY/XcyVq0Hccf1jTfgARuNuq4GGG3hnCJVi2QsOgcf9R7TeXn+p1RKIhjQoWCiEQeEBTotNbJhcabNcPGSEJw+s=</Modulus>
<Exponent>AQAB</Exponent>
</RSAKeyValue>';
$rsa->loadKey($key);
$rsa->setPublicKey();
$newkey = $rsa->getPublicKey(CRYPT_RSA_PUBLIC_FORMAT_XML);
$this->assertSame(preg_replace('#\s#', '', $key), preg_replace('#\s#', '', $newkey));
}
/**
* @group github468
*/
public function testSignedPKCS1()
{
$rsa = new Crypt_RSA();
$key = '-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC/k7FwSDE9R9rvTU2nGdJwKaVG
RvBIYGJNahseQhZkQH4CVFMdpWhmD8PyXpjNHtV1CJ0bqAX6e5QyNjvl0FeBj9dz
JWrQdxx/WNN+ABG426rgYYbeGcIlWLZCw6Bx/1HtN5ef6nVEoiGNChYKIRB4QFOi
01smFxps1w8ZIQnD6wIDAQAB
-----END PUBLIC KEY-----';
$rsa->loadKey($key);
$rsa->setPublicKey();
$newkey = $rsa->getPublicKey();
$this->assertSame(preg_replace('#\s#', '', $key), preg_replace('#\s#', '', $newkey));
}
}