ILIAS\WOPI\Discovery\ProofKey Class Reference

A public RSA key of a WOPI client, as published in its discovery with base64 encoded modulus and exponent. More...

Collaboration diagram for ILIAS\WOPI\Discovery\ProofKey:

Public Member Functions
	__construct (public string $modulus, public string $exponent)
	toPem ()

Static Private Member Functions
static	integer (string $bytes)
static	der (int $tag, string $content)

Detailed Description

A public RSA key of a WOPI client, as published in its discovery with base64 encoded modulus and exponent.

Author

Fabian Schmid fabia.nosp@m.n@sr.nosp@m..solu.nosp@m.tion.nosp@m.s

Definition at line 29 of file ProofKey.php.

Constructor & Destructor Documentation

__construct()

ILIAS\WOPI\Discovery\ProofKey::__construct	(	public string	$modulus,
		public string	$exponent
	)

Definition at line 31 of file ProofKey.php.

      {
    }

Member Function Documentation

der()

static ILIAS\WOPI\Discovery\ProofKey::der ( int  $tag, string  $content  )

staticprivate

Definition at line 65 of file ProofKey.php.

                                                          : string
    {
        $length = strlen($content);
        if ($length < 0x80) {
            return chr($tag) . chr($length) . $content;
        }
        $length_bytes = ltrim(pack('N', $length), "\x00");
 
        return chr($tag) . chr(0x80 | strlen($length_bytes)) . $length_bytes . $content;
    }

Referenced by ILIAS\WOPI\Discovery\ProofKey\integer(), and ILIAS\WOPI\Discovery\ProofKey\toPem().

Here is the caller graph for this function:

integer()

static ILIAS\WOPI\Discovery\ProofKey::integer ( string  $bytes )

staticprivate

Definition at line 55 of file ProofKey.php.

                                                  : string
    {
        $bytes = ltrim($bytes, "\x00");
        if ($bytes === '' || (ord($bytes[0]) & 0x80) !== 0) {
            $bytes = "\x00" . $bytes;
        }
 
        return self::der(0x02, $bytes);
    }

References ILIAS\WOPI\Discovery\ProofKey\der().

Here is the call graph for this function:

toPem()

ILIAS\WOPI\Discovery\ProofKey::toPem

(

)

Definition at line 37 of file ProofKey.php.

                           : string
    {
        $modulus = base64_decode($this->modulus, true);
        $exponent = base64_decode($this->exponent, true);
        if ($modulus === false || $exponent === false || $modulus === '' || $exponent === '') {
            throw new \InvalidArgumentException('Invalid proof key');
        }
 
        // SubjectPublicKeyInfo: SEQUENCE { SEQUENCE { rsaEncryption, NULL }, BIT STRING { RSAPublicKey } }
        $rsa_public_key = self::der(0x30, self::integer($modulus) . self::integer($exponent));
        $algorithm = self::der(0x30, self::der(0x06, "\x2a\x86\x48\x86\xf7\x0d\x01\x01\x01") . self::der(0x05, ''));
        $info = self::der(0x30, $algorithm . self::der(0x03, "\x00" . $rsa_public_key));
 
        return "-----BEGIN PUBLIC KEY-----\n"
            . chunk_split(base64_encode($info), 64, "\n")
            . "-----END PUBLIC KEY-----\n";
    }

References $info, and ILIAS\WOPI\Discovery\ProofKey\der().

Referenced by ILIAS\WOPI\Handler\ProofValidator\verify().

Here is the call graph for this function:

Here is the caller graph for this function:

---

The documentation for this class was generated from the following file:

• components/ILIAS/WOPI/classes/Discovery/ProofKey.php