mirror of
https://github.com/friendica/friendica
synced 2025-04-29 03:04:22 +02:00
port hubzillas OpenWebAuth - remote authentification
This commit is contained in:
rabuzarus
parent
5fb8c758fd
commit
1c7f4e3c63
16 changed files with 1151 additions and 41 deletions
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@ -4,6 +4,7 @@
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*/
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namespace Friendica\Util;
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use Friendica\Core\Addon;
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use Friendica\Core\Config;
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use ASN_BASE;
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use ASNValue;
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@ -246,4 +247,221 @@ class Crypto
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return $response;
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}
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/**
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* Encrypt a string with 'aes-256-cbc' cipher method.
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*
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* @param string $data
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* @param string $key The key used for encryption.
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* @param string $iv A non-NULL Initialization Vector.
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*
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* @return string|boolean Encrypted string or false on failure.
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*/
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private static function encryptAES256CBC($data, $key, $iv)
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{
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return openssl_encrypt($data, 'aes-256-cbc', str_pad($key, 32, "\0"), OPENSSL_RAW_DATA, str_pad($iv, 16, "\0"));
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}
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/**
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* Decrypt a string with 'aes-256-cbc' cipher method.
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*
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* @param string $data
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* @param string $key The key used for decryption.
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* @param string $iv A non-NULL Initialization Vector.
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*
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* @return string|boolean Decrypted string or false on failure.
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*/
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private static function decryptAES256CBC($data, $key, $iv)
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{
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return openssl_decrypt($data, 'aes-256-cbc', str_pad($key, 32, "\0"), OPENSSL_RAW_DATA, str_pad($iv, 16, "\0"));
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}
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/**
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* Encrypt a string with 'aes-256-ctr' cipher method.
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*
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* @param string $data
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* @param string $key The key used for encryption.
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* @param string $iv A non-NULL Initialization Vector.
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*
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* @return string|boolean Encrypted string or false on failure.
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*/
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private static function encryptAES256CTR($data, $key, $iv)
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{
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$key = substr($key, 0, 32);
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$iv = substr($iv, 0, 16);
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return openssl_encrypt($data, 'aes-256-ctr', str_pad($key, 32, "\0"), OPENSSL_RAW_DATA, str_pad($iv, 16, "\0"));
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}
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/**
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* Decrypt a string with 'aes-256-cbc' cipher method.
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*
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* @param string $data
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* @param string $key The key used for decryption.
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* @param string $iv A non-NULL Initialization Vector.
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*
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* @return string|boolean Decrypted string or false on failure.
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*/
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private static function decryptAES256CTR($data, $key, $iv)
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{
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$key = substr($key, 0, 32);
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$iv = substr($iv, 0, 16);
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return openssl_decrypt($data, 'aes-256-ctr', str_pad($key, 32, "\0"), OPENSSL_RAW_DATA, str_pad($iv, 16, "\0"));
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}
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/**
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*
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* @param string $data
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* @param string $pubkey The public key.
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* @param string $alg The algorithm used for encryption.
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*
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* @return array
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*/
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public static function encapsulate($data, $pubkey, $alg = 'aes256cbc')
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{
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if ($alg === 'aes256cbc') {
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return self::encapsulateAes($data, $pubkey);
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}
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return self::encapsulateOther($data, $pubkey, $alg);
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}
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/**
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*
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* @param type $data
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* @param type $pubkey The public key.
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* @param type $alg The algorithm used for encryption.
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*
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* @return array
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*/
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private static function encapsulateOther($data, $pubkey, $alg)
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{
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if (!$pubkey) {
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logger('no key. data: '.$data);
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}
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$fn = 'encrypt' . strtoupper($alg);
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if (method_exists(__CLASS__, $fn)) {
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// A bit hesitant to use openssl_random_pseudo_bytes() as we know
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// it has been historically targeted by US agencies for 'weakening'.
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// It is still arguably better than trying to come up with an
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// alternative cryptographically secure random generator.
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// There is little point in using the optional second arg to flag the
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// assurance of security since it is meaningless if the source algorithms
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// have been compromised. Also none of this matters if RSA has been
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// compromised by state actors and evidence is mounting that this has
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// already happened.
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$result = ['encrypted' => true];
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$key = openssl_random_pseudo_bytes(256);
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$iv = openssl_random_pseudo_bytes(256);
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$result['data'] = base64url_encode(self::$fn($data, $key, $iv), true);
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// log the offending call so we can track it down
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if (!openssl_public_encrypt($key, $k, $pubkey)) {
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$x = debug_backtrace();
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logger('RSA failed. ' . print_r($x[0], true));
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}
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$result['alg'] = $alg;
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$result['key'] = base64url_encode($k, true);
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openssl_public_encrypt($iv, $i, $pubkey);
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$result['iv'] = base64url_encode($i, true);
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return $result;
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} else {
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$x = ['data' => $data, 'pubkey' => $pubkey, 'alg' => $alg, 'result' => $data];
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Addon::callHooks('other_encapsulate', $x);
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return $x['result'];
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}
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}
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/**
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*
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* @param string $data
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* @param string $pubkey
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*
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* @return array
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*/
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private static function encapsulateAes($data, $pubkey)
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{
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if (!$pubkey) {
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logger('aes_encapsulate: no key. data: ' . $data);
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}
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$key = openssl_random_pseudo_bytes(32);
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$iv = openssl_random_pseudo_bytes(16);
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$result = ['encrypted' => true];
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$result['data'] = base64url_encode(AES256CBC_encrypt($data, $key, $iv), true);
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// log the offending call so we can track it down
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if (!openssl_public_encrypt($key, $k, $pubkey)) {
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$x = debug_backtrace();
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logger('aes_encapsulate: RSA failed. ' . print_r($x[0], true));
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}
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$result['alg'] = 'aes256cbc';
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$result['key'] = base64url_encode($k, true);
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openssl_public_encrypt($iv, $i, $pubkey);
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$result['iv'] = base64url_encode($i, true);
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return $result;
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}
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/**
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*
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* @param string $data
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* @param string $prvkey The private key used for decryption.
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*
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* @return string|boolean The decrypted string or false on failure.
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*/
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public static function unencapsulate($data, $prvkey)
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{
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if (!$data) {
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return;
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}
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$alg = ((array_key_exists('alg', $data)) ? $data['alg'] : 'aes256cbc');
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if ($alg === 'aes256cbc') {
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return self::encapsulateAes($data, $prvkey);
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}
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return self::encapsulateOther($data, $prvkey, $alg);
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}
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/**
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*
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* @param string $data
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* @param string $prvkey The private key used for decryption.
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* @param string $alg
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*
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* @return string|boolean The decrypted string or false on failure.
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*/
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private static function unencapsulateOther($data, $prvkey, $alg)
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{
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$fn = 'decrypt' . strtoupper($alg);
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if (method_exists(__CLASS__, $fn)) {
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openssl_private_decrypt(base64url_decode($data['key']), $k, $prvkey);
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openssl_private_decrypt(base64url_decode($data['iv']), $i, $prvkey);
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return self::$fn(base64url_decode($data['data']), $k, $i);
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} else {
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$x = ['data' => $data, 'prvkey' => $prvkey, 'alg' => $alg, 'result' => $data];
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Addon::callHooks('other_unencapsulate', $x);
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return $x['result'];
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}
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}
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/**
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*
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* @param array $data
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* @param string $prvkey The private key used for decryption.
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*
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* @return string|boolean The decrypted string or false on failure.
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*/
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private static function unencapsulateAes($data, $prvkey)
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{
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openssl_private_decrypt(base64url_decode($data['key']), $k, $prvkey);
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openssl_private_decrypt(base64url_decode($data['iv']), $i, $prvkey);
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return self::decryptAES256CBC(base64url_decode($data['data']), $k, $i);
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}
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}
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59
src/Util/HTTPHeaders.php
Normal file
59
src/Util/HTTPHeaders.php
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@ -0,0 +1,59 @@
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<?php
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/**
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* @file src/Util/HTTPHeaders.php
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*/
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namespace Friendica\Util;
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class HTTPHeaders
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{
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private $in_progress = [];
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private $parsed = [];
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function __construct($headers)
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{
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$lines = explode("\n", str_replace("\r", '', $headers));
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if ($lines) {
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foreach ($lines as $line) {
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if (preg_match('/^\s+/', $line, $matches) && trim($line)) {
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if ($this->in_progress['k']) {
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$this->in_progress['v'] .= ' ' . ltrim($line);
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continue;
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}
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} else {
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if ($this->in_progress['k']) {
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$this->parsed[] = [$this->in_progress['k'] => $this->in_progress['v']];
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$this->in_progress = [];
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}
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$this->in_progress['k'] = strtolower(substr($line, 0, strpos($line, ':')));
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$this->in_progress['v'] = ltrim(substr($line, strpos($line, ':') + 1));
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}
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}
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if ($this->in_progress['k']) {
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$this->parsed[] = [$this->in_progress['k'] => $this->in_progress['v']];
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$this->in_progress = [];
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}
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}
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}
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function fetch()
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{
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return $this->parsed;
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}
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function fetcharr()
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{
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$ret = [];
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if ($this->parsed) {
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foreach ($this->parsed as $x) {
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foreach ($x as $y => $z) {
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$ret[$y] = $z;
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}
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}
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}
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return $ret;
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}
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}
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352
src/Util/HTTPSig.php
Normal file
352
src/Util/HTTPSig.php
Normal file
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@ -0,0 +1,352 @@
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<?php
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/**
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* @file src/Util/HTTPSig.php
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*/
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namespace Friendica\Util;
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use Friendica\Core\Config;
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use Friendica\Util\Crypto;
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use Friendica\Util\HTTPHeaders;
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/**
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* @brief Implements HTTP Signatures per draft-cavage-http-signatures-07.
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*
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* @see https://tools.ietf.org/html/draft-cavage-http-signatures-07
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*/
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class HTTPSig
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{
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/**
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* @brief RFC5843
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*
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* @see https://tools.ietf.org/html/rfc5843
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*
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* @param string $body The value to create the digest for
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* @param boolean $set (optional, default true)
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* If set send a Digest HTTP header
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* @return string The generated digest of $body
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*/
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public static function generateDigest($body, $set = true)
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{
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$digest = base64_encode(hash('sha256', $body, true));
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if($set) {
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header('Digest: SHA-256=' . $digest);
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}
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return $digest;
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}
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// See draft-cavage-http-signatures-08
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public static function verify($data, $key = '')
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{
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$body = $data;
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$headers = null;
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$spoofable = false;
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$result = [
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'signer' => '',
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'header_signed' => false,
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'header_valid' => false,
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'content_signed' => false,
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'content_valid' => false
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];
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// Decide if $data arrived via controller submission or curl.
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if (is_array($data) && $data['header']) {
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if (!$data['success']) {
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return $result;
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}
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$h = new HTTPHeaders($data['header']);
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$headers = $h->fetcharr();
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$body = $data['body'];
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} else {
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$headers = [];
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$headers['(request-target)'] = strtolower($_SERVER['REQUEST_METHOD']).' '.$_SERVER['REQUEST_URI'];
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foreach ($_SERVER as $k => $v) {
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if (strpos($k, 'HTTP_') === 0) {
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$field = str_replace('_', '-', strtolower(substr($k, 5)));
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$headers[$field] = $v;
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}
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}
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}
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$sig_block = null;
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if (array_key_exists('signature', $headers)) {
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$sig_block = self::parseSigheader($headers['signature']);
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} elseif (array_key_exists('authorization', $headers)) {
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$sig_block = self::parseSigheader($headers['authorization']);
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}
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if (!$sig_block) {
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logger('no signature provided.');
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return $result;
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}
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// Warning: This log statement includes binary data
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// logger('sig_block: ' . print_r($sig_block,true), LOGGER_DATA);
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$result['header_signed'] = true;
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$signed_headers = $sig_block['headers'];
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if (!$signed_headers) {
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$signed_headers = ['date'];
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}
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$signed_data = '';
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foreach ($signed_headers as $h) {
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if (array_key_exists($h, $headers)) {
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$signed_data .= $h . ': ' . $headers[$h] . "\n";
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}
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if (strpos($h, '.')) {
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$spoofable = true;
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}
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}
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$signed_data = rtrim($signed_data, "\n");
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$algorithm = null;
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if ($sig_block['algorithm'] === 'rsa-sha256') {
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$algorithm = 'sha256';
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}
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if ($sig_block['algorithm'] === 'rsa-sha512') {
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$algorithm = 'sha512';
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}
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if ($key && function_exists($key)) { /// @todo What function do we check for - maybe we check now for a method !!!
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$result['signer'] = $sig_block['keyId'];
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$key = $key($sig_block['keyId']);
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}
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if (!$key) {
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return $result;
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}
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$x = Crypto::rsaVerify($signed_data, $sig_block['signature'], $key, $algorithm);
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logger('verified: ' . $x, LOGGER_DEBUG);
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if (!$x) {
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return $result;
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}
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if (!$spoofable) {
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$result['header_valid'] = true;
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}
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if (in_array('digest', $signed_headers)) {
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$result['content_signed'] = true;
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$digest = explode('=', $headers['digest']);
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if ($digest[0] === 'SHA-256') {
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$hashalg = 'sha256';
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}
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if ($digest[0] === 'SHA-512') {
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$hashalg = 'sha512';
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}
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// The explode operation will have stripped the '=' padding, so compare against unpadded base64.
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if (rtrim(base64_encode(hash($hashalg, $body, true)), '=') === $digest[1]) {
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$result['content_valid'] = true;
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}
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}
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logger('Content_Valid: ' . $result['content_valid']);
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return $result;
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}
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/**
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* @brief
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*
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* @param string $request
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* @param array $head
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* @param string $prvkey
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* @param string $keyid (optional, default 'Key')
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* @param boolean $send_headers (optional, default false)
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* If set send a HTTP header
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* @param boolean $auth (optional, default false)
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* @param string $alg (optional, default 'sha256')
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* @param string $crypt_key (optional, default null)
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* @param string $crypt_algo (optional, default 'aes256ctr')
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*
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* @return array
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*/
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public static function createSig($request, $head, $prvkey, $keyid = 'Key', $send_headers = false, $auth = false, $alg = 'sha256', $crypt_key = null, $crypt_algo = 'aes256ctr')
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{
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$return_headers = [];
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if ($alg === 'sha256') {
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$algorithm = 'rsa-sha256';
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}
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if ($alg === 'sha512') {
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$algorithm = 'rsa-sha512';
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}
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$x = self::sign($request, $head, $prvkey, $alg);
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$headerval = 'keyId="' . $keyid . '",algorithm="' . $algorithm
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. '",headers="' . $x['headers'] . '",signature="' . $x['signature'] . '"';
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||||
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if ($crypt_key) {
|
||||
$x = Crypto::encapsulate($headerval, $crypt_key, $crypt_algo);
|
||||
$headerval = 'iv="' . $x['iv'] . '",key="' . $x['key'] . '",alg="' . $x['alg'] . '",data="' . $x['data'] . '"';
|
||||
}
|
||||
|
||||
if ($auth) {
|
||||
$sighead = 'Authorization: Signature ' . $headerval;
|
||||
} else {
|
||||
$sighead = 'Signature: ' . $headerval;
|
||||
}
|
||||
|
||||
if ($head) {
|
||||
foreach ($head as $k => $v) {
|
||||
if ($send_headers) {
|
||||
header($k . ': ' . $v);
|
||||
} else {
|
||||
$return_headers[] = $k . ': ' . $v;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if ($send_headers) {
|
||||
header($sighead);
|
||||
} else {
|
||||
$return_headers[] = $sighead;
|
||||
}
|
||||
|
||||
return $return_headers;
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief
|
||||
*
|
||||
* @param string $request
|
||||
* @param array $head
|
||||
* @param string $prvkey
|
||||
* @param string $alg (optional) default 'sha256'
|
||||
*
|
||||
* @return array
|
||||
*/
|
||||
private static function sign($request, $head, $prvkey, $alg = 'sha256')
|
||||
{
|
||||
$ret = [];
|
||||
$headers = '';
|
||||
$fields = '';
|
||||
|
||||
if ($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");
|
||||
}
|
||||
|
||||
$sig = base64_encode(Crypto::rsaSign($headers, $prvkey, $alg));
|
||||
|
||||
$ret['headers'] = $fields;
|
||||
$ret['signature'] = $sig;
|
||||
|
||||
return $ret;
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief
|
||||
*
|
||||
* @param string $header
|
||||
* @return array associate array with
|
||||
* - \e string \b keyID
|
||||
* - \e string \b algorithm
|
||||
* - \e array \b headers
|
||||
* - \e string \b signature
|
||||
*/
|
||||
public static function parseSigheader($header)
|
||||
{
|
||||
$ret = [];
|
||||
$matches = [];
|
||||
|
||||
// if the header is encrypted, decrypt with (default) site private key and continue
|
||||
if (preg_match('/iv="(.*?)"/ism', $header, $matches)) {
|
||||
$header = self::decryptSigheader($header);
|
||||
}
|
||||
|
||||
if (preg_match('/keyId="(.*?)"/ism', $header, $matches)) {
|
||||
$ret['keyId'] = $matches[1];
|
||||
}
|
||||
|
||||
if (preg_match('/algorithm="(.*?)"/ism', $header, $matches)) {
|
||||
$ret['algorithm'] = $matches[1];
|
||||
}
|
||||
|
||||
if (preg_match('/headers="(.*?)"/ism', $header, $matches)) {
|
||||
$ret['headers'] = explode(' ', $matches[1]);
|
||||
}
|
||||
|
||||
if (preg_match('/signature="(.*?)"/ism', $header, $matches)) {
|
||||
$ret['signature'] = base64_decode(preg_replace('/\s+/', '', $matches[1]));
|
||||
}
|
||||
|
||||
if (($ret['signature']) && ($ret['algorithm']) && (!$ret['headers'])) {
|
||||
$ret['headers'] = ['date'];
|
||||
}
|
||||
|
||||
return $ret;
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief
|
||||
*
|
||||
* @param string $header
|
||||
* @param string $prvkey (optional), if not set use site private key
|
||||
*
|
||||
* @return array|string associative array, empty string if failue
|
||||
* - \e string \b iv
|
||||
* - \e string \b key
|
||||
* - \e string \b alg
|
||||
* - \e string \b data
|
||||
*/
|
||||
private static function decryptSigheader($header, $prvkey = null)
|
||||
{
|
||||
$iv = $key = $alg = $data = null;
|
||||
|
||||
if (!$prvkey) {
|
||||
$prvkey = Config::get('system', 'prvkey');
|
||||
}
|
||||
|
||||
$matches = [];
|
||||
|
||||
if (preg_match('/iv="(.*?)"/ism', $header, $matches)) {
|
||||
$iv = $matches[1];
|
||||
}
|
||||
|
||||
if (preg_match('/key="(.*?)"/ism', $header, $matches)) {
|
||||
$key = $matches[1];
|
||||
}
|
||||
|
||||
if (preg_match('/alg="(.*?)"/ism', $header, $matches)) {
|
||||
$alg = $matches[1];
|
||||
}
|
||||
|
||||
if (preg_match('/data="(.*?)"/ism', $header, $matches)) {
|
||||
$data = $matches[1];
|
||||
}
|
||||
|
||||
if ($iv && $key && $alg && $data) {
|
||||
return Crypto::unencapsulate(['iv' => $iv, 'key' => $key, 'alg' => $alg, 'data' => $data], $prvkey);
|
||||
}
|
||||
|
||||
return '';
|
||||
}
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue