git subrepo clone https://github.com/mailcow/mailcow-dockerized.git mailcow/src/mailcow-dockerized
subrepo: subdir: "mailcow/src/mailcow-dockerized"
merged: "a832becb"
upstream: origin: "https://github.com/mailcow/mailcow-dockerized.git"
branch: "master"
commit: "a832becb"
git-subrepo: version: "0.4.3"
origin: "???"
commit: "???"
Change-Id: If5be2d621a211e164c9b6577adaa7884449f16b5
diff --git a/mailcow/src/mailcow-dockerized/data/web/inc/lib/WebAuthn/Attestation/AuthenticatorData.php b/mailcow/src/mailcow-dockerized/data/web/inc/lib/WebAuthn/Attestation/AuthenticatorData.php
new file mode 100644
index 0000000..374d9ab
--- /dev/null
+++ b/mailcow/src/mailcow-dockerized/data/web/inc/lib/WebAuthn/Attestation/AuthenticatorData.php
@@ -0,0 +1,423 @@
+<?php
+
+namespace WebAuthn\Attestation;
+use WebAuthn\WebAuthnException;
+use WebAuthn\CBOR\CborDecoder;
+use WebAuthn\Binary\ByteBuffer;
+
+/**
+ * @author Lukas Buchs
+ * @license https://github.com/lbuchs/WebAuthn/blob/master/LICENSE MIT
+ */
+class AuthenticatorData {
+ protected $_binary;
+ protected $_rpIdHash;
+ protected $_flags;
+ protected $_signCount;
+ protected $_attestedCredentialData;
+ protected $_extensionData;
+
+
+
+ // Cose encoded keys
+ private static $_COSE_KTY = 1;
+ private static $_COSE_ALG = 3;
+
+ // Cose EC2 ES256 P-256 curve
+ private static $_COSE_CRV = -1;
+ private static $_COSE_X = -2;
+ private static $_COSE_Y = -3;
+
+ // Cose RSA PS256
+ private static $_COSE_N = -1;
+ private static $_COSE_E = -2;
+
+ private static $_EC2_TYPE = 2;
+ private static $_EC2_ES256 = -7;
+ private static $_EC2_P256 = 1;
+
+ private static $_RSA_TYPE = 3;
+ private static $_RSA_RS256 = -257;
+
+ /**
+ * Parsing the authenticatorData binary.
+ * @param string $binary
+ * @throws WebAuthnException
+ */
+ public function __construct($binary) {
+ if (!\is_string($binary) || \strlen($binary) < 37) {
+ throw new WebAuthnException('Invalid authenticatorData input', WebAuthnException::INVALID_DATA);
+ }
+ $this->_binary = $binary;
+
+ // Read infos from binary
+ // https://www.w3.org/TR/webauthn/#sec-authenticator-data
+
+ // RP ID
+ $this->_rpIdHash = \substr($binary, 0, 32);
+
+ // flags (1 byte)
+ $flags = \unpack('Cflags', \substr($binary, 32, 1))['flags'];
+ $this->_flags = $this->_readFlags($flags);
+
+ // signature counter: 32-bit unsigned big-endian integer.
+ $this->_signCount = \unpack('Nsigncount', \substr($binary, 33, 4))['signcount'];
+
+ $offset = 37;
+ // https://www.w3.org/TR/webauthn/#sec-attested-credential-data
+ if ($this->_flags->attestedDataIncluded) {
+ $this->_attestedCredentialData = $this->_readAttestData($binary, $offset);
+ }
+
+ if ($this->_flags->extensionDataIncluded) {
+ $this->_readExtensionData(\substr($binary, $offset));
+ }
+ }
+
+ /**
+ * Authenticator Attestation Globally Unique Identifier, a unique number
+ * that identifies the model of the authenticator (not the specific instance
+ * of the authenticator)
+ * The aaguid may be 0 if the user is using a old u2f device and/or if
+ * the browser is using the fido-u2f format.
+ * @return string
+ * @throws WebAuthnException
+ */
+ public function getAAGUID() {
+ if (!($this->_attestedCredentialData instanceof \stdClass)) {
+ throw new WebAuthnException('credential data not included in authenticator data', WebAuthnException::INVALID_DATA);
+ }
+ return $this->_attestedCredentialData->aaguid;
+ }
+
+ /**
+ * returns the authenticatorData as binary
+ * @return string
+ */
+ public function getBinary() {
+ return $this->_binary;
+ }
+
+ /**
+ * returns the credentialId
+ * @return string
+ * @throws WebAuthnException
+ */
+ public function getCredentialId() {
+ if (!($this->_attestedCredentialData instanceof \stdClass)) {
+ throw new WebAuthnException('credential id not included in authenticator data', WebAuthnException::INVALID_DATA);
+ }
+ return $this->_attestedCredentialData->credentialId;
+ }
+
+ /**
+ * returns the public key in PEM format
+ * @return string
+ */
+ public function getPublicKeyPem() {
+ $der = null;
+ switch ($this->_attestedCredentialData->credentialPublicKey->kty) {
+ case self::$_EC2_TYPE: $der = $this->_getEc2Der(); break;
+ case self::$_RSA_TYPE: $der = $this->_getRsaDer(); break;
+ default: throw new WebAuthnException('invalid key type', WebAuthnException::INVALID_DATA);
+ }
+
+ $pem = '-----BEGIN PUBLIC KEY-----' . "\n";
+ $pem .= \chunk_split(\base64_encode($der), 64, "\n");
+ $pem .= '-----END PUBLIC KEY-----' . "\n";
+ return $pem;
+ }
+
+ /**
+ * returns the public key in U2F format
+ * @return string
+ * @throws WebAuthnException
+ */
+ public function getPublicKeyU2F() {
+ if (!($this->_attestedCredentialData instanceof \stdClass)) {
+ throw new WebAuthnException('credential data not included in authenticator data', WebAuthnException::INVALID_DATA);
+ }
+ return "\x04" . // ECC uncompressed
+ $this->_attestedCredentialData->credentialPublicKey->x .
+ $this->_attestedCredentialData->credentialPublicKey->y;
+ }
+
+ /**
+ * returns the SHA256 hash of the relying party id (=hostname)
+ * @return string
+ */
+ public function getRpIdHash() {
+ return $this->_rpIdHash;
+ }
+
+ /**
+ * returns the sign counter
+ * @return int
+ */
+ public function getSignCount() {
+ return $this->_signCount;
+ }
+
+ /**
+ * returns true if the user is present
+ * @return boolean
+ */
+ public function getUserPresent() {
+ return $this->_flags->userPresent;
+ }
+
+ /**
+ * returns true if the user is verified
+ * @return boolean
+ */
+ public function getUserVerified() {
+ return $this->_flags->userVerified;
+ }
+
+ // -----------------------------------------------
+ // PRIVATE
+ // -----------------------------------------------
+
+ /**
+ * Returns DER encoded EC2 key
+ * @return string
+ */
+ private function _getEc2Der() {
+ return $this->_der_sequence(
+ $this->_der_sequence(
+ $this->_der_oid("\x2A\x86\x48\xCE\x3D\x02\x01") . // OID 1.2.840.10045.2.1 ecPublicKey
+ $this->_der_oid("\x2A\x86\x48\xCE\x3D\x03\x01\x07") // 1.2.840.10045.3.1.7 prime256v1
+ ) .
+ $this->_der_bitString($this->getPublicKeyU2F())
+ );
+ }
+
+ /**
+ * Returns DER encoded RSA key
+ * @return string
+ */
+ private function _getRsaDer() {
+ return $this->_der_sequence(
+ $this->_der_sequence(
+ $this->_der_oid("\x2A\x86\x48\x86\xF7\x0D\x01\x01\x01") . // OID 1.2.840.113549.1.1.1 rsaEncryption
+ $this->_der_nullValue()
+ ) .
+ $this->_der_bitString(
+ $this->_der_sequence(
+ $this->_der_unsignedInteger($this->_attestedCredentialData->credentialPublicKey->n) .
+ $this->_der_unsignedInteger($this->_attestedCredentialData->credentialPublicKey->e)
+ )
+ )
+ );
+ }
+
+ /**
+ * reads the flags from flag byte
+ * @param string $binFlag
+ * @return \stdClass
+ */
+ private function _readFlags($binFlag) {
+ $flags = new \stdClass();
+
+ $flags->bit_0 = !!($binFlag & 1);
+ $flags->bit_1 = !!($binFlag & 2);
+ $flags->bit_2 = !!($binFlag & 4);
+ $flags->bit_3 = !!($binFlag & 8);
+ $flags->bit_4 = !!($binFlag & 16);
+ $flags->bit_5 = !!($binFlag & 32);
+ $flags->bit_6 = !!($binFlag & 64);
+ $flags->bit_7 = !!($binFlag & 128);
+
+ // named flags
+ $flags->userPresent = $flags->bit_0;
+ $flags->userVerified = $flags->bit_2;
+ $flags->attestedDataIncluded = $flags->bit_6;
+ $flags->extensionDataIncluded = $flags->bit_7;
+ return $flags;
+ }
+
+ /**
+ * read attested data
+ * @param string $binary
+ * @param int $endOffset
+ * @return \stdClass
+ * @throws WebAuthnException
+ */
+ private function _readAttestData($binary, &$endOffset) {
+ $attestedCData = new \stdClass();
+ if (\strlen($binary) <= 55) {
+ throw new WebAuthnException('Attested data should be present but is missing', WebAuthnException::INVALID_DATA);
+ }
+
+ // The AAGUID of the authenticator
+ $attestedCData->aaguid = \substr($binary, 37, 16);
+
+ //Byte length L of Credential ID, 16-bit unsigned big-endian integer.
+ $length = \unpack('nlength', \substr($binary, 53, 2))['length'];
+ $attestedCData->credentialId = \substr($binary, 55, $length);
+
+ // set end offset
+ $endOffset = 55 + $length;
+
+ // extract public key
+ $attestedCData->credentialPublicKey = $this->_readCredentialPublicKey($binary, 55 + $length, $endOffset);
+
+ return $attestedCData;
+ }
+
+ /**
+ * reads COSE key-encoded elliptic curve public key in EC2 format
+ * @param string $binary
+ * @param int $endOffset
+ * @return \stdClass
+ * @throws WebAuthnException
+ */
+ private function _readCredentialPublicKey($binary, $offset, &$endOffset) {
+ $enc = CborDecoder::decodeInPlace($binary, $offset, $endOffset);
+
+ // COSE key-encoded elliptic curve public key in EC2 format
+ $credPKey = new \stdClass();
+ $credPKey->kty = $enc[self::$_COSE_KTY];
+ $credPKey->alg = $enc[self::$_COSE_ALG];
+
+ switch ($credPKey->alg) {
+ case self::$_EC2_ES256: $this->_readCredentialPublicKeyES256($credPKey, $enc); break;
+ case self::$_RSA_RS256: $this->_readCredentialPublicKeyRS256($credPKey, $enc); break;
+ }
+
+ return $credPKey;
+ }
+
+ /**
+ * extract ES256 informations from cose
+ * @param \stdClass $credPKey
+ * @param \stdClass $enc
+ * @throws WebAuthnException
+ */
+ private function _readCredentialPublicKeyES256(&$credPKey, $enc) {
+ $credPKey->crv = $enc[self::$_COSE_CRV];
+ $credPKey->x = $enc[self::$_COSE_X] instanceof ByteBuffer ? $enc[self::$_COSE_X]->getBinaryString() : null;
+ $credPKey->y = $enc[self::$_COSE_Y] instanceof ByteBuffer ? $enc[self::$_COSE_Y]->getBinaryString() : null;
+ unset ($enc);
+
+ // Validation
+ if ($credPKey->kty !== self::$_EC2_TYPE) {
+ throw new WebAuthnException('public key not in EC2 format', WebAuthnException::INVALID_PUBLIC_KEY);
+ }
+
+ if ($credPKey->alg !== self::$_EC2_ES256) {
+ throw new WebAuthnException('signature algorithm not ES256', WebAuthnException::INVALID_PUBLIC_KEY);
+ }
+
+ if ($credPKey->crv !== self::$_EC2_P256) {
+ throw new WebAuthnException('curve not P-256', WebAuthnException::INVALID_PUBLIC_KEY);
+ }
+
+ if (\strlen($credPKey->x) !== 32) {
+ throw new WebAuthnException('Invalid X-coordinate', WebAuthnException::INVALID_PUBLIC_KEY);
+ }
+
+ if (\strlen($credPKey->y) !== 32) {
+ throw new WebAuthnException('Invalid Y-coordinate', WebAuthnException::INVALID_PUBLIC_KEY);
+ }
+ }
+
+ /**
+ * extract RS256 informations from COSE
+ * @param \stdClass $credPKey
+ * @param \stdClass $enc
+ * @throws WebAuthnException
+ */
+ private function _readCredentialPublicKeyRS256(&$credPKey, $enc) {
+ $credPKey->n = $enc[self::$_COSE_N] instanceof ByteBuffer ? $enc[self::$_COSE_N]->getBinaryString() : null;
+ $credPKey->e = $enc[self::$_COSE_E] instanceof ByteBuffer ? $enc[self::$_COSE_E]->getBinaryString() : null;
+ unset ($enc);
+
+ // Validation
+ if ($credPKey->kty !== self::$_RSA_TYPE) {
+ throw new WebAuthnException('public key not in RSA format', WebAuthnException::INVALID_PUBLIC_KEY);
+ }
+
+ if ($credPKey->alg !== self::$_RSA_RS256) {
+ throw new WebAuthnException('signature algorithm not ES256', WebAuthnException::INVALID_PUBLIC_KEY);
+ }
+
+ if (\strlen($credPKey->n) !== 256) {
+ throw new WebAuthnException('Invalid RSA modulus', WebAuthnException::INVALID_PUBLIC_KEY);
+ }
+
+ if (\strlen($credPKey->e) !== 3) {
+ throw new WebAuthnException('Invalid RSA public exponent', WebAuthnException::INVALID_PUBLIC_KEY);
+ }
+
+ }
+
+ /**
+ * reads cbor encoded extension data.
+ * @param string $binary
+ * @return array
+ * @throws WebAuthnException
+ */
+ private function _readExtensionData($binary) {
+ $ext = CborDecoder::decode($binary);
+ if (!\is_array($ext)) {
+ throw new WebAuthnException('invalid extension data', WebAuthnException::INVALID_DATA);
+ }
+
+ return $ext;
+ }
+
+
+ // ---------------
+ // DER functions
+ // ---------------
+
+ private function _der_length($len) {
+ if ($len < 128) {
+ return \chr($len);
+ }
+ $lenBytes = '';
+ while ($len > 0) {
+ $lenBytes = \chr($len % 256) . $lenBytes;
+ $len = \intdiv($len, 256);
+ }
+ return \chr(0x80 | \strlen($lenBytes)) . $lenBytes;
+ }
+
+ private function _der_sequence($contents) {
+ return "\x30" . $this->_der_length(\strlen($contents)) . $contents;
+ }
+
+ private function _der_oid($encoded) {
+ return "\x06" . $this->_der_length(\strlen($encoded)) . $encoded;
+ }
+
+ private function _der_bitString($bytes) {
+ return "\x03" . $this->_der_length(\strlen($bytes) + 1) . "\x00" . $bytes;
+ }
+
+ private function _der_nullValue() {
+ return "\x05\x00";
+ }
+
+ private function _der_unsignedInteger($bytes) {
+ $len = \strlen($bytes);
+
+ // Remove leading zero bytes
+ for ($i = 0; $i < ($len - 1); $i++) {
+ if (\ord($bytes[$i]) !== 0) {
+ break;
+ }
+ }
+ if ($i !== 0) {
+ $bytes = \substr($bytes, $i);
+ }
+
+ // If most significant bit is set, prefix with another zero to prevent it being seen as negative number
+ if ((\ord($bytes[0]) & 0x80) !== 0) {
+ $bytes = "\x00" . $bytes;
+ }
+
+ return "\x02" . $this->_der_length(\strlen($bytes)) . $bytes;
+ }
+}