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9
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<?php |
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2 |
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if (class_exists('ParagonIE_Sodium_File', false)) { |
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return; |
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} |
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/** |
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* Class ParagonIE_Sodium_File |
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*/ |
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class ParagonIE_Sodium_File extends ParagonIE_Sodium_Core_Util |
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{ |
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/* PHP's default buffer size is 8192 for fread()/fwrite(). */ |
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const BUFFER_SIZE = 8192; |
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13 |
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/** |
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* Box a file (rather than a string). Uses less memory than |
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* ParagonIE_Sodium_Compat::crypto_box(), but produces |
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* the same result. |
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* |
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* @param string $inputFile Absolute path to a file on the filesystem |
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* @param string $outputFile Absolute path to a file on the filesystem |
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* @param string $nonce Number to be used only once |
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* @param string $keyPair ECDH secret key and ECDH public key concatenated |
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* |
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* @return bool |
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* @throws SodiumException |
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* @throws TypeError |
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*/ |
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public static function box($inputFile, $outputFile, $nonce, $keyPair) |
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{ |
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/* Type checks: */ |
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if (!is_string($inputFile)) { |
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throw new TypeError('Argument 1 must be a string, ' . gettype($inputFile) . ' given.'); |
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} |
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if (!is_string($outputFile)) { |
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throw new TypeError('Argument 2 must be a string, ' . gettype($outputFile) . ' given.'); |
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} |
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if (!is_string($nonce)) { |
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throw new TypeError('Argument 3 must be a string, ' . gettype($nonce) . ' given.'); |
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} |
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40 |
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/* Input validation: */ |
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if (!is_string($keyPair)) { |
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throw new TypeError('Argument 4 must be a string, ' . gettype($keyPair) . ' given.'); |
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} |
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if (self::strlen($nonce) !== ParagonIE_Sodium_Compat::CRYPTO_BOX_NONCEBYTES) { |
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throw new TypeError('Argument 3 must be CRYPTO_BOX_NONCEBYTES bytes'); |
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} |
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if (self::strlen($keyPair) !== ParagonIE_Sodium_Compat::CRYPTO_BOX_KEYPAIRBYTES) { |
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throw new TypeError('Argument 4 must be CRYPTO_BOX_KEYPAIRBYTES bytes'); |
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} |
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/** @var int $size */ |
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$size = filesize($inputFile); |
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if (!is_int($size)) { |
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throw new SodiumException('Could not obtain the file size'); |
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} |
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57 |
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/** @var resource $ifp */ |
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$ifp = fopen($inputFile, 'rb'); |
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if (!is_resource($ifp)) { |
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throw new SodiumException('Could not open input file for reading'); |
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} |
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/** @var resource $ofp */ |
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$ofp = fopen($outputFile, 'wb'); |
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if (!is_resource($ofp)) { |
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fclose($ifp); |
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throw new SodiumException('Could not open output file for writing'); |
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} |
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$res = self::box_encrypt($ifp, $ofp, $size, $nonce, $keyPair); |
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fclose($ifp); |
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fclose($ofp); |
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return $res; |
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} |
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/** |
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* Open a boxed file (rather than a string). Uses less memory than |
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* ParagonIE_Sodium_Compat::crypto_box_open(), but produces |
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* the same result. |
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* |
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* Warning: Does not protect against TOCTOU attacks. You should |
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* just load the file into memory and use crypto_box_open() if |
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* you are worried about those. |
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* |
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* @param string $inputFile |
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* @param string $outputFile |
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* @param string $nonce |
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* @param string $keypair |
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* @return bool |
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* @throws SodiumException |
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* @throws TypeError |
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*/ |
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public static function box_open($inputFile, $outputFile, $nonce, $keypair) |
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{ |
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/* Type checks: */ |
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if (!is_string($inputFile)) { |
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throw new TypeError('Argument 1 must be a string, ' . gettype($inputFile) . ' given.'); |
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} |
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if (!is_string($outputFile)) { |
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throw new TypeError('Argument 2 must be a string, ' . gettype($outputFile) . ' given.'); |
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} |
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if (!is_string($nonce)) { |
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throw new TypeError('Argument 3 must be a string, ' . gettype($nonce) . ' given.'); |
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} |
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if (!is_string($keypair)) { |
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throw new TypeError('Argument 4 must be a string, ' . gettype($keypair) . ' given.'); |
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} |
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/* Input validation: */ |
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if (self::strlen($nonce) !== ParagonIE_Sodium_Compat::CRYPTO_BOX_NONCEBYTES) { |
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throw new TypeError('Argument 4 must be CRYPTO_BOX_NONCEBYTES bytes'); |
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} |
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if (self::strlen($keypair) !== ParagonIE_Sodium_Compat::CRYPTO_BOX_KEYPAIRBYTES) { |
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throw new TypeError('Argument 4 must be CRYPTO_BOX_KEYPAIRBYTES bytes'); |
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} |
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/** @var int $size */ |
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$size = filesize($inputFile); |
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if (!is_int($size)) { |
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throw new SodiumException('Could not obtain the file size'); |
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} |
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/** @var resource $ifp */ |
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$ifp = fopen($inputFile, 'rb'); |
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if (!is_resource($ifp)) { |
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throw new SodiumException('Could not open input file for reading'); |
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} |
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129 |
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/** @var resource $ofp */ |
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$ofp = fopen($outputFile, 'wb'); |
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if (!is_resource($ofp)) { |
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fclose($ifp); |
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throw new SodiumException('Could not open output file for writing'); |
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} |
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136 |
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$res = self::box_decrypt($ifp, $ofp, $size, $nonce, $keypair); |
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fclose($ifp); |
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fclose($ofp); |
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try { |
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ParagonIE_Sodium_Compat::memzero($nonce); |
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ParagonIE_Sodium_Compat::memzero($ephKeypair); |
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} catch (SodiumException $ex) { |
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18
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144 |
if (isset($ephKeypair)) { |
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unset($ephKeypair); |
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} |
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9
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} |
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return $res; |
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} |
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150 |
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/** |
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* Seal a file (rather than a string). Uses less memory than |
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* ParagonIE_Sodium_Compat::crypto_box_seal(), but produces |
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* the same result. |
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* |
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* @param string $inputFile Absolute path to a file on the filesystem |
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* @param string $outputFile Absolute path to a file on the filesystem |
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* @param string $publicKey ECDH public key |
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* |
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* @return bool |
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* @throws SodiumException |
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* @throws TypeError |
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*/ |
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public static function box_seal($inputFile, $outputFile, $publicKey) |
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{ |
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/* Type checks: */ |
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if (!is_string($inputFile)) { |
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throw new TypeError('Argument 1 must be a string, ' . gettype($inputFile) . ' given.'); |
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} |
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if (!is_string($outputFile)) { |
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throw new TypeError('Argument 2 must be a string, ' . gettype($outputFile) . ' given.'); |
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} |
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if (!is_string($publicKey)) { |
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throw new TypeError('Argument 3 must be a string, ' . gettype($publicKey) . ' given.'); |
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} |
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176 |
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/* Input validation: */ |
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if (self::strlen($publicKey) !== ParagonIE_Sodium_Compat::CRYPTO_BOX_PUBLICKEYBYTES) { |
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throw new TypeError('Argument 3 must be CRYPTO_BOX_PUBLICKEYBYTES bytes'); |
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} |
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181 |
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/** @var int $size */ |
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$size = filesize($inputFile); |
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if (!is_int($size)) { |
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throw new SodiumException('Could not obtain the file size'); |
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} |
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187 |
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/** @var resource $ifp */ |
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$ifp = fopen($inputFile, 'rb'); |
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if (!is_resource($ifp)) { |
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throw new SodiumException('Could not open input file for reading'); |
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} |
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193 |
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/** @var resource $ofp */ |
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$ofp = fopen($outputFile, 'wb'); |
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if (!is_resource($ofp)) { |
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fclose($ifp); |
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throw new SodiumException('Could not open output file for writing'); |
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} |
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200 |
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/** @var string $ephKeypair */ |
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$ephKeypair = ParagonIE_Sodium_Compat::crypto_box_keypair(); |
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203 |
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/** @var string $msgKeypair */ |
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$msgKeypair = ParagonIE_Sodium_Compat::crypto_box_keypair_from_secretkey_and_publickey( |
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ParagonIE_Sodium_Compat::crypto_box_secretkey($ephKeypair), |
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$publicKey |
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); |
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209 |
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/** @var string $ephemeralPK */ |
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$ephemeralPK = ParagonIE_Sodium_Compat::crypto_box_publickey($ephKeypair); |
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212 |
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/** @var string $nonce */ |
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$nonce = ParagonIE_Sodium_Compat::crypto_generichash( |
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$ephemeralPK . $publicKey, |
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'', |
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217 |
24 |
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); |
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219 |
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/** @var int $firstWrite */ |
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$firstWrite = fwrite( |
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222 |
$ofp, |
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$ephemeralPK, |
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ParagonIE_Sodium_Compat::CRYPTO_BOX_PUBLICKEYBYTES |
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); |
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226 |
if (!is_int($firstWrite)) { |
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227 |
fclose($ifp); |
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228 |
fclose($ofp); |
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229 |
ParagonIE_Sodium_Compat::memzero($ephKeypair); |
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230 |
throw new SodiumException('Could not write to output file'); |
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231 |
} |
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232 |
if ($firstWrite !== ParagonIE_Sodium_Compat::CRYPTO_BOX_PUBLICKEYBYTES) { |
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233 |
ParagonIE_Sodium_Compat::memzero($ephKeypair); |
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234 |
fclose($ifp); |
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fclose($ofp); |
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236 |
throw new SodiumException('Error writing public key to output file'); |
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237 |
} |
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238 |
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$res = self::box_encrypt($ifp, $ofp, $size, $nonce, $msgKeypair); |
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240 |
fclose($ifp); |
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241 |
fclose($ofp); |
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242 |
try { |
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243 |
ParagonIE_Sodium_Compat::memzero($nonce); |
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244 |
ParagonIE_Sodium_Compat::memzero($ephKeypair); |
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245 |
} catch (SodiumException $ex) { |
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246 |
/** @psalm-suppress PossiblyUndefinedVariable */ |
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unset($ephKeypair); |
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248 |
} |
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249 |
return $res; |
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250 |
} |
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251 |
|
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252 |
/** |
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253 |
* Open a sealed file (rather than a string). Uses less memory than |
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254 |
* ParagonIE_Sodium_Compat::crypto_box_seal_open(), but produces |
|
|
255 |
* the same result. |
|
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256 |
* |
|
|
257 |
* Warning: Does not protect against TOCTOU attacks. You should |
|
|
258 |
* just load the file into memory and use crypto_box_seal_open() if |
|
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259 |
* you are worried about those. |
|
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260 |
* |
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261 |
* @param string $inputFile |
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262 |
* @param string $outputFile |
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263 |
* @param string $ecdhKeypair |
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264 |
* @return bool |
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265 |
* @throws SodiumException |
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266 |
* @throws TypeError |
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267 |
*/ |
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268 |
public static function box_seal_open($inputFile, $outputFile, $ecdhKeypair) |
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269 |
{ |
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270 |
/* Type checks: */ |
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271 |
if (!is_string($inputFile)) { |
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272 |
throw new TypeError('Argument 1 must be a string, ' . gettype($inputFile) . ' given.'); |
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273 |
} |
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274 |
if (!is_string($outputFile)) { |
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275 |
throw new TypeError('Argument 2 must be a string, ' . gettype($outputFile) . ' given.'); |
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276 |
} |
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277 |
if (!is_string($ecdhKeypair)) { |
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278 |
throw new TypeError('Argument 3 must be a string, ' . gettype($ecdhKeypair) . ' given.'); |
|
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279 |
} |
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280 |
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281 |
/* Input validation: */ |
|
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282 |
if (self::strlen($ecdhKeypair) !== ParagonIE_Sodium_Compat::CRYPTO_BOX_KEYPAIRBYTES) { |
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283 |
throw new TypeError('Argument 3 must be CRYPTO_BOX_KEYPAIRBYTES bytes'); |
|
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284 |
} |
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285 |
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286 |
$publicKey = ParagonIE_Sodium_Compat::crypto_box_publickey($ecdhKeypair); |
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287 |
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288 |
/** @var int $size */ |
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289 |
$size = filesize($inputFile); |
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|
290 |
if (!is_int($size)) { |
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291 |
throw new SodiumException('Could not obtain the file size'); |
|
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292 |
} |
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293 |
|
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294 |
/** @var resource $ifp */ |
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295 |
$ifp = fopen($inputFile, 'rb'); |
|
|
296 |
if (!is_resource($ifp)) { |
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297 |
throw new SodiumException('Could not open input file for reading'); |
|
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298 |
} |
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|
299 |
|
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300 |
/** @var resource $ofp */ |
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301 |
$ofp = fopen($outputFile, 'wb'); |
|
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302 |
if (!is_resource($ofp)) { |
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303 |
fclose($ifp); |
|
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304 |
throw new SodiumException('Could not open output file for writing'); |
|
|
305 |
} |
|
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306 |
|
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307 |
$ephemeralPK = fread($ifp, ParagonIE_Sodium_Compat::CRYPTO_BOX_PUBLICKEYBYTES); |
|
|
308 |
if (!is_string($ephemeralPK)) { |
|
|
309 |
throw new SodiumException('Could not read input file'); |
|
|
310 |
} |
|
|
311 |
if (self::strlen($ephemeralPK) !== ParagonIE_Sodium_Compat::CRYPTO_BOX_PUBLICKEYBYTES) { |
|
|
312 |
fclose($ifp); |
|
|
313 |
fclose($ofp); |
|
|
314 |
throw new SodiumException('Could not read public key from sealed file'); |
|
|
315 |
} |
|
|
316 |
|
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|
317 |
$nonce = ParagonIE_Sodium_Compat::crypto_generichash( |
|
|
318 |
$ephemeralPK . $publicKey, |
|
|
319 |
'', |
|
|
320 |
24 |
|
|
321 |
); |
|
|
322 |
$msgKeypair = ParagonIE_Sodium_Compat::crypto_box_keypair_from_secretkey_and_publickey( |
|
|
323 |
ParagonIE_Sodium_Compat::crypto_box_secretkey($ecdhKeypair), |
|
|
324 |
$ephemeralPK |
|
|
325 |
); |
|
|
326 |
|
|
|
327 |
$res = self::box_decrypt($ifp, $ofp, $size, $nonce, $msgKeypair); |
|
|
328 |
fclose($ifp); |
|
|
329 |
fclose($ofp); |
|
|
330 |
try { |
|
|
331 |
ParagonIE_Sodium_Compat::memzero($nonce); |
|
|
332 |
ParagonIE_Sodium_Compat::memzero($ephKeypair); |
|
|
333 |
} catch (SodiumException $ex) { |
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18
|
334 |
if (isset($ephKeypair)) { |
|
|
335 |
unset($ephKeypair); |
|
|
336 |
} |
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9
|
337 |
} |
|
|
338 |
return $res; |
|
|
339 |
} |
|
|
340 |
|
|
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341 |
/** |
|
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342 |
* Calculate the BLAKE2b hash of a file. |
|
|
343 |
* |
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344 |
* @param string $filePath Absolute path to a file on the filesystem |
|
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345 |
* @param string|null $key BLAKE2b key |
|
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346 |
* @param int $outputLength Length of hash output |
|
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347 |
* |
|
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348 |
* @return string BLAKE2b hash |
|
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349 |
* @throws SodiumException |
|
|
350 |
* @throws TypeError |
|
|
351 |
* @psalm-suppress FailedTypeResolution |
|
|
352 |
*/ |
|
|
353 |
public static function generichash($filePath, $key = '', $outputLength = 32) |
|
|
354 |
{ |
|
|
355 |
/* Type checks: */ |
|
|
356 |
if (!is_string($filePath)) { |
|
|
357 |
throw new TypeError('Argument 1 must be a string, ' . gettype($filePath) . ' given.'); |
|
|
358 |
} |
|
|
359 |
if (!is_string($key)) { |
|
|
360 |
if (is_null($key)) { |
|
|
361 |
$key = ''; |
|
|
362 |
} else { |
|
|
363 |
throw new TypeError('Argument 2 must be a string, ' . gettype($key) . ' given.'); |
|
|
364 |
} |
|
|
365 |
} |
|
|
366 |
if (!is_int($outputLength)) { |
|
|
367 |
if (!is_numeric($outputLength)) { |
|
|
368 |
throw new TypeError('Argument 3 must be an integer, ' . gettype($outputLength) . ' given.'); |
|
|
369 |
} |
|
|
370 |
$outputLength = (int) $outputLength; |
|
|
371 |
} |
|
|
372 |
|
|
|
373 |
/* Input validation: */ |
|
|
374 |
if (!empty($key)) { |
|
|
375 |
if (self::strlen($key) < ParagonIE_Sodium_Compat::CRYPTO_GENERICHASH_KEYBYTES_MIN) { |
|
|
376 |
throw new TypeError('Argument 2 must be at least CRYPTO_GENERICHASH_KEYBYTES_MIN bytes'); |
|
|
377 |
} |
|
|
378 |
if (self::strlen($key) > ParagonIE_Sodium_Compat::CRYPTO_GENERICHASH_KEYBYTES_MAX) { |
|
|
379 |
throw new TypeError('Argument 2 must be at most CRYPTO_GENERICHASH_KEYBYTES_MAX bytes'); |
|
|
380 |
} |
|
|
381 |
} |
|
|
382 |
if ($outputLength < ParagonIE_Sodium_Compat::CRYPTO_GENERICHASH_BYTES_MIN) { |
|
|
383 |
throw new SodiumException('Argument 3 must be at least CRYPTO_GENERICHASH_BYTES_MIN'); |
|
|
384 |
} |
|
|
385 |
if ($outputLength > ParagonIE_Sodium_Compat::CRYPTO_GENERICHASH_BYTES_MAX) { |
|
|
386 |
throw new SodiumException('Argument 3 must be at least CRYPTO_GENERICHASH_BYTES_MAX'); |
|
|
387 |
} |
|
|
388 |
|
|
|
389 |
/** @var int $size */ |
|
|
390 |
$size = filesize($filePath); |
|
|
391 |
if (!is_int($size)) { |
|
|
392 |
throw new SodiumException('Could not obtain the file size'); |
|
|
393 |
} |
|
|
394 |
|
|
|
395 |
/** @var resource $fp */ |
|
|
396 |
$fp = fopen($filePath, 'rb'); |
|
|
397 |
if (!is_resource($fp)) { |
|
|
398 |
throw new SodiumException('Could not open input file for reading'); |
|
|
399 |
} |
|
|
400 |
$ctx = ParagonIE_Sodium_Compat::crypto_generichash_init($key, $outputLength); |
|
|
401 |
while ($size > 0) { |
|
|
402 |
$blockSize = $size > 64 |
|
|
403 |
? 64 |
|
|
404 |
: $size; |
|
|
405 |
$read = fread($fp, $blockSize); |
|
|
406 |
if (!is_string($read)) { |
|
|
407 |
throw new SodiumException('Could not read input file'); |
|
|
408 |
} |
|
|
409 |
ParagonIE_Sodium_Compat::crypto_generichash_update($ctx, $read); |
|
|
410 |
$size -= $blockSize; |
|
|
411 |
} |
|
|
412 |
|
|
|
413 |
fclose($fp); |
|
|
414 |
return ParagonIE_Sodium_Compat::crypto_generichash_final($ctx, $outputLength); |
|
|
415 |
} |
|
|
416 |
|
|
|
417 |
/** |
|
|
418 |
* Encrypt a file (rather than a string). Uses less memory than |
|
|
419 |
* ParagonIE_Sodium_Compat::crypto_secretbox(), but produces |
|
|
420 |
* the same result. |
|
|
421 |
* |
|
|
422 |
* @param string $inputFile Absolute path to a file on the filesystem |
|
|
423 |
* @param string $outputFile Absolute path to a file on the filesystem |
|
|
424 |
* @param string $nonce Number to be used only once |
|
|
425 |
* @param string $key Encryption key |
|
|
426 |
* |
|
|
427 |
* @return bool |
|
|
428 |
* @throws SodiumException |
|
|
429 |
* @throws TypeError |
|
|
430 |
*/ |
|
|
431 |
public static function secretbox($inputFile, $outputFile, $nonce, $key) |
|
|
432 |
{ |
|
|
433 |
/* Type checks: */ |
|
|
434 |
if (!is_string($inputFile)) { |
|
|
435 |
throw new TypeError('Argument 1 must be a string, ' . gettype($inputFile) . ' given..'); |
|
|
436 |
} |
|
|
437 |
if (!is_string($outputFile)) { |
|
|
438 |
throw new TypeError('Argument 2 must be a string, ' . gettype($outputFile) . ' given.'); |
|
|
439 |
} |
|
|
440 |
if (!is_string($nonce)) { |
|
|
441 |
throw new TypeError('Argument 3 must be a string, ' . gettype($nonce) . ' given.'); |
|
|
442 |
} |
|
|
443 |
|
|
|
444 |
/* Input validation: */ |
|
|
445 |
if (self::strlen($nonce) !== ParagonIE_Sodium_Compat::CRYPTO_SECRETBOX_NONCEBYTES) { |
|
|
446 |
throw new TypeError('Argument 3 must be CRYPTO_SECRETBOX_NONCEBYTES bytes'); |
|
|
447 |
} |
|
|
448 |
if (!is_string($key)) { |
|
|
449 |
throw new TypeError('Argument 4 must be a string, ' . gettype($key) . ' given.'); |
|
|
450 |
} |
|
|
451 |
if (self::strlen($key) !== ParagonIE_Sodium_Compat::CRYPTO_SECRETBOX_KEYBYTES) { |
|
|
452 |
throw new TypeError('Argument 4 must be CRYPTO_SECRETBOX_KEYBYTES bytes'); |
|
|
453 |
} |
|
|
454 |
|
|
|
455 |
/** @var int $size */ |
|
|
456 |
$size = filesize($inputFile); |
|
|
457 |
if (!is_int($size)) { |
|
|
458 |
throw new SodiumException('Could not obtain the file size'); |
|
|
459 |
} |
|
|
460 |
|
|
|
461 |
/** @var resource $ifp */ |
|
|
462 |
$ifp = fopen($inputFile, 'rb'); |
|
|
463 |
if (!is_resource($ifp)) { |
|
|
464 |
throw new SodiumException('Could not open input file for reading'); |
|
|
465 |
} |
|
|
466 |
|
|
|
467 |
/** @var resource $ofp */ |
|
|
468 |
$ofp = fopen($outputFile, 'wb'); |
|
|
469 |
if (!is_resource($ofp)) { |
|
|
470 |
fclose($ifp); |
|
|
471 |
throw new SodiumException('Could not open output file for writing'); |
|
|
472 |
} |
|
|
473 |
|
|
|
474 |
$res = self::secretbox_encrypt($ifp, $ofp, $size, $nonce, $key); |
|
|
475 |
fclose($ifp); |
|
|
476 |
fclose($ofp); |
|
|
477 |
return $res; |
|
|
478 |
} |
|
|
479 |
/** |
|
|
480 |
* Seal a file (rather than a string). Uses less memory than |
|
|
481 |
* ParagonIE_Sodium_Compat::crypto_secretbox_open(), but produces |
|
|
482 |
* the same result. |
|
|
483 |
* |
|
|
484 |
* Warning: Does not protect against TOCTOU attacks. You should |
|
|
485 |
* just load the file into memory and use crypto_secretbox_open() if |
|
|
486 |
* you are worried about those. |
|
|
487 |
* |
|
|
488 |
* @param string $inputFile |
|
|
489 |
* @param string $outputFile |
|
|
490 |
* @param string $nonce |
|
|
491 |
* @param string $key |
|
|
492 |
* @return bool |
|
|
493 |
* @throws SodiumException |
|
|
494 |
* @throws TypeError |
|
|
495 |
*/ |
|
|
496 |
public static function secretbox_open($inputFile, $outputFile, $nonce, $key) |
|
|
497 |
{ |
|
|
498 |
/* Type checks: */ |
|
|
499 |
if (!is_string($inputFile)) { |
|
|
500 |
throw new TypeError('Argument 1 must be a string, ' . gettype($inputFile) . ' given.'); |
|
|
501 |
} |
|
|
502 |
if (!is_string($outputFile)) { |
|
|
503 |
throw new TypeError('Argument 2 must be a string, ' . gettype($outputFile) . ' given.'); |
|
|
504 |
} |
|
|
505 |
if (!is_string($nonce)) { |
|
|
506 |
throw new TypeError('Argument 3 must be a string, ' . gettype($nonce) . ' given.'); |
|
|
507 |
} |
|
|
508 |
if (!is_string($key)) { |
|
|
509 |
throw new TypeError('Argument 4 must be a string, ' . gettype($key) . ' given.'); |
|
|
510 |
} |
|
|
511 |
|
|
|
512 |
/* Input validation: */ |
|
|
513 |
if (self::strlen($nonce) !== ParagonIE_Sodium_Compat::CRYPTO_SECRETBOX_NONCEBYTES) { |
|
|
514 |
throw new TypeError('Argument 4 must be CRYPTO_SECRETBOX_NONCEBYTES bytes'); |
|
|
515 |
} |
|
|
516 |
if (self::strlen($key) !== ParagonIE_Sodium_Compat::CRYPTO_SECRETBOX_KEYBYTES) { |
|
|
517 |
throw new TypeError('Argument 4 must be CRYPTO_SECRETBOXBOX_KEYBYTES bytes'); |
|
|
518 |
} |
|
|
519 |
|
|
|
520 |
/** @var int $size */ |
|
|
521 |
$size = filesize($inputFile); |
|
|
522 |
if (!is_int($size)) { |
|
|
523 |
throw new SodiumException('Could not obtain the file size'); |
|
|
524 |
} |
|
|
525 |
|
|
|
526 |
/** @var resource $ifp */ |
|
|
527 |
$ifp = fopen($inputFile, 'rb'); |
|
|
528 |
if (!is_resource($ifp)) { |
|
|
529 |
throw new SodiumException('Could not open input file for reading'); |
|
|
530 |
} |
|
|
531 |
|
|
|
532 |
/** @var resource $ofp */ |
|
|
533 |
$ofp = fopen($outputFile, 'wb'); |
|
|
534 |
if (!is_resource($ofp)) { |
|
|
535 |
fclose($ifp); |
|
|
536 |
throw new SodiumException('Could not open output file for writing'); |
|
|
537 |
} |
|
|
538 |
|
|
|
539 |
$res = self::secretbox_decrypt($ifp, $ofp, $size, $nonce, $key); |
|
|
540 |
fclose($ifp); |
|
|
541 |
fclose($ofp); |
|
|
542 |
try { |
|
|
543 |
ParagonIE_Sodium_Compat::memzero($key); |
|
|
544 |
} catch (SodiumException $ex) { |
|
18
|
545 |
/** @psalm-suppress PossiblyUndefinedVariable */ |
|
9
|
546 |
unset($key); |
|
|
547 |
} |
|
|
548 |
return $res; |
|
|
549 |
} |
|
|
550 |
|
|
|
551 |
/** |
|
|
552 |
* Sign a file (rather than a string). Uses less memory than |
|
|
553 |
* ParagonIE_Sodium_Compat::crypto_sign_detached(), but produces |
|
|
554 |
* the same result. |
|
|
555 |
* |
|
|
556 |
* @param string $filePath Absolute path to a file on the filesystem |
|
|
557 |
* @param string $secretKey Secret signing key |
|
|
558 |
* |
|
|
559 |
* @return string Ed25519 signature |
|
|
560 |
* @throws SodiumException |
|
|
561 |
* @throws TypeError |
|
|
562 |
*/ |
|
|
563 |
public static function sign($filePath, $secretKey) |
|
|
564 |
{ |
|
|
565 |
/* Type checks: */ |
|
|
566 |
if (!is_string($filePath)) { |
|
|
567 |
throw new TypeError('Argument 1 must be a string, ' . gettype($filePath) . ' given.'); |
|
|
568 |
} |
|
|
569 |
if (!is_string($secretKey)) { |
|
|
570 |
throw new TypeError('Argument 2 must be a string, ' . gettype($secretKey) . ' given.'); |
|
|
571 |
} |
|
|
572 |
|
|
|
573 |
/* Input validation: */ |
|
|
574 |
if (self::strlen($secretKey) !== ParagonIE_Sodium_Compat::CRYPTO_SIGN_SECRETKEYBYTES) { |
|
|
575 |
throw new TypeError('Argument 2 must be CRYPTO_SIGN_SECRETKEYBYTES bytes'); |
|
|
576 |
} |
|
|
577 |
if (PHP_INT_SIZE === 4) { |
|
|
578 |
return self::sign_core32($filePath, $secretKey); |
|
|
579 |
} |
|
|
580 |
|
|
|
581 |
/** @var int $size */ |
|
|
582 |
$size = filesize($filePath); |
|
|
583 |
if (!is_int($size)) { |
|
|
584 |
throw new SodiumException('Could not obtain the file size'); |
|
|
585 |
} |
|
|
586 |
|
|
|
587 |
/** @var resource $fp */ |
|
|
588 |
$fp = fopen($filePath, 'rb'); |
|
|
589 |
if (!is_resource($fp)) { |
|
|
590 |
throw new SodiumException('Could not open input file for reading'); |
|
|
591 |
} |
|
|
592 |
|
|
|
593 |
/** @var string $az */ |
|
|
594 |
$az = hash('sha512', self::substr($secretKey, 0, 32), true); |
|
|
595 |
|
|
|
596 |
$az[0] = self::intToChr(self::chrToInt($az[0]) & 248); |
|
|
597 |
$az[31] = self::intToChr((self::chrToInt($az[31]) & 63) | 64); |
|
|
598 |
|
|
|
599 |
$hs = hash_init('sha512'); |
|
18
|
600 |
self::hash_update($hs, self::substr($az, 32, 32)); |
|
9
|
601 |
/** @var resource $hs */ |
|
|
602 |
$hs = self::updateHashWithFile($hs, $fp, $size); |
|
|
603 |
|
|
|
604 |
/** @var string $nonceHash */ |
|
|
605 |
$nonceHash = hash_final($hs, true); |
|
|
606 |
|
|
|
607 |
/** @var string $pk */ |
|
|
608 |
$pk = self::substr($secretKey, 32, 32); |
|
|
609 |
|
|
|
610 |
/** @var string $nonce */ |
|
|
611 |
$nonce = ParagonIE_Sodium_Core_Ed25519::sc_reduce($nonceHash) . self::substr($nonceHash, 32); |
|
|
612 |
|
|
|
613 |
/** @var string $sig */ |
|
|
614 |
$sig = ParagonIE_Sodium_Core_Ed25519::ge_p3_tobytes( |
|
|
615 |
ParagonIE_Sodium_Core_Ed25519::ge_scalarmult_base($nonce) |
|
|
616 |
); |
|
|
617 |
|
|
|
618 |
$hs = hash_init('sha512'); |
|
18
|
619 |
self::hash_update($hs, self::substr($sig, 0, 32)); |
|
|
620 |
self::hash_update($hs, self::substr($pk, 0, 32)); |
|
9
|
621 |
/** @var resource $hs */ |
|
|
622 |
$hs = self::updateHashWithFile($hs, $fp, $size); |
|
|
623 |
|
|
|
624 |
/** @var string $hramHash */ |
|
|
625 |
$hramHash = hash_final($hs, true); |
|
|
626 |
|
|
|
627 |
/** @var string $hram */ |
|
|
628 |
$hram = ParagonIE_Sodium_Core_Ed25519::sc_reduce($hramHash); |
|
|
629 |
|
|
|
630 |
/** @var string $sigAfter */ |
|
|
631 |
$sigAfter = ParagonIE_Sodium_Core_Ed25519::sc_muladd($hram, $az, $nonce); |
|
|
632 |
|
|
|
633 |
/** @var string $sig */ |
|
|
634 |
$sig = self::substr($sig, 0, 32) . self::substr($sigAfter, 0, 32); |
|
|
635 |
|
|
|
636 |
try { |
|
|
637 |
ParagonIE_Sodium_Compat::memzero($az); |
|
|
638 |
} catch (SodiumException $ex) { |
|
|
639 |
$az = null; |
|
|
640 |
} |
|
|
641 |
fclose($fp); |
|
|
642 |
return $sig; |
|
|
643 |
} |
|
|
644 |
|
|
|
645 |
/** |
|
|
646 |
* Verify a file (rather than a string). Uses less memory than |
|
|
647 |
* ParagonIE_Sodium_Compat::crypto_sign_verify_detached(), but |
|
|
648 |
* produces the same result. |
|
|
649 |
* |
|
|
650 |
* @param string $sig Ed25519 signature |
|
|
651 |
* @param string $filePath Absolute path to a file on the filesystem |
|
|
652 |
* @param string $publicKey Signing public key |
|
|
653 |
* |
|
|
654 |
* @return bool |
|
|
655 |
* @throws SodiumException |
|
|
656 |
* @throws TypeError |
|
|
657 |
* @throws Exception |
|
|
658 |
*/ |
|
|
659 |
public static function verify($sig, $filePath, $publicKey) |
|
|
660 |
{ |
|
|
661 |
/* Type checks: */ |
|
|
662 |
if (!is_string($sig)) { |
|
|
663 |
throw new TypeError('Argument 1 must be a string, ' . gettype($sig) . ' given.'); |
|
|
664 |
} |
|
|
665 |
if (!is_string($filePath)) { |
|
|
666 |
throw new TypeError('Argument 2 must be a string, ' . gettype($filePath) . ' given.'); |
|
|
667 |
} |
|
|
668 |
if (!is_string($publicKey)) { |
|
|
669 |
throw new TypeError('Argument 3 must be a string, ' . gettype($publicKey) . ' given.'); |
|
|
670 |
} |
|
|
671 |
|
|
|
672 |
/* Input validation: */ |
|
|
673 |
if (self::strlen($sig) !== ParagonIE_Sodium_Compat::CRYPTO_SIGN_BYTES) { |
|
|
674 |
throw new TypeError('Argument 1 must be CRYPTO_SIGN_BYTES bytes'); |
|
|
675 |
} |
|
|
676 |
if (self::strlen($publicKey) !== ParagonIE_Sodium_Compat::CRYPTO_SIGN_PUBLICKEYBYTES) { |
|
|
677 |
throw new TypeError('Argument 3 must be CRYPTO_SIGN_PUBLICKEYBYTES bytes'); |
|
|
678 |
} |
|
|
679 |
if (self::strlen($sig) < 64) { |
|
|
680 |
throw new SodiumException('Signature is too short'); |
|
|
681 |
} |
|
|
682 |
|
|
|
683 |
if (PHP_INT_SIZE === 4) { |
|
|
684 |
return self::verify_core32($sig, $filePath, $publicKey); |
|
|
685 |
} |
|
|
686 |
|
|
|
687 |
/* Security checks */ |
|
16
|
688 |
if ( |
|
|
689 |
(ParagonIE_Sodium_Core_Ed25519::chrToInt($sig[63]) & 240) |
|
|
690 |
&& |
|
|
691 |
ParagonIE_Sodium_Core_Ed25519::check_S_lt_L(self::substr($sig, 32, 32)) |
|
|
692 |
) { |
|
9
|
693 |
throw new SodiumException('S < L - Invalid signature'); |
|
|
694 |
} |
|
|
695 |
if (ParagonIE_Sodium_Core_Ed25519::small_order($sig)) { |
|
|
696 |
throw new SodiumException('Signature is on too small of an order'); |
|
|
697 |
} |
|
|
698 |
if ((self::chrToInt($sig[63]) & 224) !== 0) { |
|
|
699 |
throw new SodiumException('Invalid signature'); |
|
|
700 |
} |
|
|
701 |
$d = 0; |
|
|
702 |
for ($i = 0; $i < 32; ++$i) { |
|
|
703 |
$d |= self::chrToInt($publicKey[$i]); |
|
|
704 |
} |
|
|
705 |
if ($d === 0) { |
|
|
706 |
throw new SodiumException('All zero public key'); |
|
|
707 |
} |
|
|
708 |
|
|
|
709 |
/** @var int $size */ |
|
|
710 |
$size = filesize($filePath); |
|
|
711 |
if (!is_int($size)) { |
|
|
712 |
throw new SodiumException('Could not obtain the file size'); |
|
|
713 |
} |
|
|
714 |
|
|
|
715 |
/** @var resource $fp */ |
|
|
716 |
$fp = fopen($filePath, 'rb'); |
|
|
717 |
if (!is_resource($fp)) { |
|
|
718 |
throw new SodiumException('Could not open input file for reading'); |
|
|
719 |
} |
|
|
720 |
|
|
|
721 |
/** @var bool The original value of ParagonIE_Sodium_Compat::$fastMult */ |
|
|
722 |
$orig = ParagonIE_Sodium_Compat::$fastMult; |
|
|
723 |
|
|
|
724 |
// Set ParagonIE_Sodium_Compat::$fastMult to true to speed up verification. |
|
|
725 |
ParagonIE_Sodium_Compat::$fastMult = true; |
|
|
726 |
|
|
|
727 |
/** @var ParagonIE_Sodium_Core_Curve25519_Ge_P3 $A */ |
|
|
728 |
$A = ParagonIE_Sodium_Core_Ed25519::ge_frombytes_negate_vartime($publicKey); |
|
|
729 |
|
|
|
730 |
$hs = hash_init('sha512'); |
|
18
|
731 |
self::hash_update($hs, self::substr($sig, 0, 32)); |
|
|
732 |
self::hash_update($hs, self::substr($publicKey, 0, 32)); |
|
9
|
733 |
/** @var resource $hs */ |
|
|
734 |
$hs = self::updateHashWithFile($hs, $fp, $size); |
|
|
735 |
/** @var string $hDigest */ |
|
|
736 |
$hDigest = hash_final($hs, true); |
|
|
737 |
|
|
|
738 |
/** @var string $h */ |
|
|
739 |
$h = ParagonIE_Sodium_Core_Ed25519::sc_reduce($hDigest) . self::substr($hDigest, 32); |
|
|
740 |
|
|
|
741 |
/** @var ParagonIE_Sodium_Core_Curve25519_Ge_P2 $R */ |
|
|
742 |
$R = ParagonIE_Sodium_Core_Ed25519::ge_double_scalarmult_vartime( |
|
|
743 |
$h, |
|
|
744 |
$A, |
|
|
745 |
self::substr($sig, 32) |
|
|
746 |
); |
|
|
747 |
|
|
|
748 |
/** @var string $rcheck */ |
|
|
749 |
$rcheck = ParagonIE_Sodium_Core_Ed25519::ge_tobytes($R); |
|
|
750 |
|
|
|
751 |
// Close the file handle |
|
|
752 |
fclose($fp); |
|
|
753 |
|
|
|
754 |
// Reset ParagonIE_Sodium_Compat::$fastMult to what it was before. |
|
|
755 |
ParagonIE_Sodium_Compat::$fastMult = $orig; |
|
|
756 |
return self::verify_32($rcheck, self::substr($sig, 0, 32)); |
|
|
757 |
} |
|
|
758 |
|
|
|
759 |
/** |
|
|
760 |
* @param resource $ifp |
|
|
761 |
* @param resource $ofp |
|
|
762 |
* @param int $mlen |
|
|
763 |
* @param string $nonce |
|
|
764 |
* @param string $boxKeypair |
|
|
765 |
* @return bool |
|
|
766 |
* @throws SodiumException |
|
|
767 |
* @throws TypeError |
|
|
768 |
*/ |
|
|
769 |
protected static function box_encrypt($ifp, $ofp, $mlen, $nonce, $boxKeypair) |
|
|
770 |
{ |
|
|
771 |
if (PHP_INT_SIZE === 4) { |
|
|
772 |
return self::secretbox_encrypt( |
|
|
773 |
$ifp, |
|
|
774 |
$ofp, |
|
|
775 |
$mlen, |
|
|
776 |
$nonce, |
|
|
777 |
ParagonIE_Sodium_Crypto32::box_beforenm( |
|
|
778 |
ParagonIE_Sodium_Crypto32::box_secretkey($boxKeypair), |
|
|
779 |
ParagonIE_Sodium_Crypto32::box_publickey($boxKeypair) |
|
|
780 |
) |
|
|
781 |
); |
|
|
782 |
} |
|
|
783 |
return self::secretbox_encrypt( |
|
|
784 |
$ifp, |
|
|
785 |
$ofp, |
|
|
786 |
$mlen, |
|
|
787 |
$nonce, |
|
|
788 |
ParagonIE_Sodium_Crypto::box_beforenm( |
|
|
789 |
ParagonIE_Sodium_Crypto::box_secretkey($boxKeypair), |
|
|
790 |
ParagonIE_Sodium_Crypto::box_publickey($boxKeypair) |
|
|
791 |
) |
|
|
792 |
); |
|
|
793 |
} |
|
|
794 |
|
|
|
795 |
|
|
|
796 |
/** |
|
|
797 |
* @param resource $ifp |
|
|
798 |
* @param resource $ofp |
|
|
799 |
* @param int $mlen |
|
|
800 |
* @param string $nonce |
|
|
801 |
* @param string $boxKeypair |
|
|
802 |
* @return bool |
|
|
803 |
* @throws SodiumException |
|
|
804 |
* @throws TypeError |
|
|
805 |
*/ |
|
|
806 |
protected static function box_decrypt($ifp, $ofp, $mlen, $nonce, $boxKeypair) |
|
|
807 |
{ |
|
|
808 |
if (PHP_INT_SIZE === 4) { |
|
|
809 |
return self::secretbox_decrypt( |
|
|
810 |
$ifp, |
|
|
811 |
$ofp, |
|
|
812 |
$mlen, |
|
|
813 |
$nonce, |
|
|
814 |
ParagonIE_Sodium_Crypto32::box_beforenm( |
|
|
815 |
ParagonIE_Sodium_Crypto32::box_secretkey($boxKeypair), |
|
|
816 |
ParagonIE_Sodium_Crypto32::box_publickey($boxKeypair) |
|
|
817 |
) |
|
|
818 |
); |
|
|
819 |
} |
|
|
820 |
return self::secretbox_decrypt( |
|
|
821 |
$ifp, |
|
|
822 |
$ofp, |
|
|
823 |
$mlen, |
|
|
824 |
$nonce, |
|
|
825 |
ParagonIE_Sodium_Crypto::box_beforenm( |
|
|
826 |
ParagonIE_Sodium_Crypto::box_secretkey($boxKeypair), |
|
|
827 |
ParagonIE_Sodium_Crypto::box_publickey($boxKeypair) |
|
|
828 |
) |
|
|
829 |
); |
|
|
830 |
} |
|
|
831 |
|
|
|
832 |
/** |
|
|
833 |
* Encrypt a file |
|
|
834 |
* |
|
|
835 |
* @param resource $ifp |
|
|
836 |
* @param resource $ofp |
|
|
837 |
* @param int $mlen |
|
|
838 |
* @param string $nonce |
|
|
839 |
* @param string $key |
|
|
840 |
* @return bool |
|
|
841 |
* @throws SodiumException |
|
|
842 |
* @throws TypeError |
|
|
843 |
*/ |
|
|
844 |
protected static function secretbox_encrypt($ifp, $ofp, $mlen, $nonce, $key) |
|
|
845 |
{ |
|
|
846 |
if (PHP_INT_SIZE === 4) { |
|
|
847 |
return self::secretbox_encrypt_core32($ifp, $ofp, $mlen, $nonce, $key); |
|
|
848 |
} |
|
|
849 |
|
|
|
850 |
$plaintext = fread($ifp, 32); |
|
|
851 |
if (!is_string($plaintext)) { |
|
|
852 |
throw new SodiumException('Could not read input file'); |
|
|
853 |
} |
|
16
|
854 |
$first32 = self::ftell($ifp); |
|
9
|
855 |
|
|
|
856 |
/** @var string $subkey */ |
|
|
857 |
$subkey = ParagonIE_Sodium_Core_HSalsa20::hsalsa20($nonce, $key); |
|
|
858 |
|
|
|
859 |
/** @var string $realNonce */ |
|
|
860 |
$realNonce = ParagonIE_Sodium_Core_Util::substr($nonce, 16, 8); |
|
|
861 |
|
|
|
862 |
/** @var string $block0 */ |
|
|
863 |
$block0 = str_repeat("\x00", 32); |
|
|
864 |
|
|
|
865 |
/** @var int $mlen - Length of the plaintext message */ |
|
|
866 |
$mlen0 = $mlen; |
|
|
867 |
if ($mlen0 > 64 - ParagonIE_Sodium_Crypto::secretbox_xsalsa20poly1305_ZEROBYTES) { |
|
|
868 |
$mlen0 = 64 - ParagonIE_Sodium_Crypto::secretbox_xsalsa20poly1305_ZEROBYTES; |
|
|
869 |
} |
|
|
870 |
$block0 .= ParagonIE_Sodium_Core_Util::substr($plaintext, 0, $mlen0); |
|
|
871 |
|
|
|
872 |
/** @var string $block0 */ |
|
|
873 |
$block0 = ParagonIE_Sodium_Core_Salsa20::salsa20_xor( |
|
|
874 |
$block0, |
|
|
875 |
$realNonce, |
|
|
876 |
$subkey |
|
|
877 |
); |
|
|
878 |
|
|
|
879 |
$state = new ParagonIE_Sodium_Core_Poly1305_State( |
|
|
880 |
ParagonIE_Sodium_Core_Util::substr( |
|
|
881 |
$block0, |
|
|
882 |
0, |
|
|
883 |
ParagonIE_Sodium_Crypto::onetimeauth_poly1305_KEYBYTES |
|
|
884 |
) |
|
|
885 |
); |
|
|
886 |
|
|
|
887 |
// Pre-write 16 blank bytes for the Poly1305 tag |
|
16
|
888 |
$start = self::ftell($ofp); |
|
9
|
889 |
fwrite($ofp, str_repeat("\x00", 16)); |
|
|
890 |
|
|
|
891 |
/** @var string $c */ |
|
|
892 |
$cBlock = ParagonIE_Sodium_Core_Util::substr( |
|
|
893 |
$block0, |
|
|
894 |
ParagonIE_Sodium_Crypto::secretbox_xsalsa20poly1305_ZEROBYTES |
|
|
895 |
); |
|
|
896 |
$state->update($cBlock); |
|
|
897 |
fwrite($ofp, $cBlock); |
|
|
898 |
$mlen -= 32; |
|
|
899 |
|
|
|
900 |
/** @var int $iter */ |
|
|
901 |
$iter = 1; |
|
|
902 |
|
|
|
903 |
/** @var int $incr */ |
|
|
904 |
$incr = self::BUFFER_SIZE >> 6; |
|
|
905 |
|
|
|
906 |
/* |
|
|
907 |
* Set the cursor to the end of the first half-block. All future bytes will |
|
|
908 |
* generated from salsa20_xor_ic, starting from 1 (second block). |
|
|
909 |
*/ |
|
|
910 |
fseek($ifp, $first32, SEEK_SET); |
|
|
911 |
|
|
|
912 |
while ($mlen > 0) { |
|
|
913 |
$blockSize = $mlen > self::BUFFER_SIZE |
|
|
914 |
? self::BUFFER_SIZE |
|
|
915 |
: $mlen; |
|
|
916 |
$plaintext = fread($ifp, $blockSize); |
|
|
917 |
if (!is_string($plaintext)) { |
|
|
918 |
throw new SodiumException('Could not read input file'); |
|
|
919 |
} |
|
|
920 |
$cBlock = ParagonIE_Sodium_Core_Salsa20::salsa20_xor_ic( |
|
|
921 |
$plaintext, |
|
|
922 |
$realNonce, |
|
|
923 |
$iter, |
|
|
924 |
$subkey |
|
|
925 |
); |
|
|
926 |
fwrite($ofp, $cBlock, $blockSize); |
|
|
927 |
$state->update($cBlock); |
|
|
928 |
|
|
|
929 |
$mlen -= $blockSize; |
|
|
930 |
$iter += $incr; |
|
|
931 |
} |
|
|
932 |
try { |
|
|
933 |
ParagonIE_Sodium_Compat::memzero($block0); |
|
|
934 |
ParagonIE_Sodium_Compat::memzero($subkey); |
|
|
935 |
} catch (SodiumException $ex) { |
|
|
936 |
$block0 = null; |
|
|
937 |
$subkey = null; |
|
|
938 |
} |
|
16
|
939 |
$end = self::ftell($ofp); |
|
9
|
940 |
|
|
|
941 |
/* |
|
|
942 |
* Write the Poly1305 authentication tag that provides integrity |
|
|
943 |
* over the ciphertext (encrypt-then-MAC) |
|
|
944 |
*/ |
|
|
945 |
fseek($ofp, $start, SEEK_SET); |
|
|
946 |
fwrite($ofp, $state->finish(), ParagonIE_Sodium_Compat::CRYPTO_SECRETBOX_MACBYTES); |
|
|
947 |
fseek($ofp, $end, SEEK_SET); |
|
|
948 |
unset($state); |
|
|
949 |
|
|
|
950 |
return true; |
|
|
951 |
} |
|
|
952 |
|
|
|
953 |
/** |
|
|
954 |
* Decrypt a file |
|
|
955 |
* |
|
|
956 |
* @param resource $ifp |
|
|
957 |
* @param resource $ofp |
|
|
958 |
* @param int $mlen |
|
|
959 |
* @param string $nonce |
|
|
960 |
* @param string $key |
|
|
961 |
* @return bool |
|
|
962 |
* @throws SodiumException |
|
|
963 |
* @throws TypeError |
|
|
964 |
*/ |
|
|
965 |
protected static function secretbox_decrypt($ifp, $ofp, $mlen, $nonce, $key) |
|
|
966 |
{ |
|
|
967 |
if (PHP_INT_SIZE === 4) { |
|
|
968 |
return self::secretbox_decrypt_core32($ifp, $ofp, $mlen, $nonce, $key); |
|
|
969 |
} |
|
|
970 |
$tag = fread($ifp, 16); |
|
|
971 |
if (!is_string($tag)) { |
|
|
972 |
throw new SodiumException('Could not read input file'); |
|
|
973 |
} |
|
|
974 |
|
|
|
975 |
/** @var string $subkey */ |
|
|
976 |
$subkey = ParagonIE_Sodium_Core_HSalsa20::hsalsa20($nonce, $key); |
|
|
977 |
|
|
|
978 |
/** @var string $realNonce */ |
|
|
979 |
$realNonce = ParagonIE_Sodium_Core_Util::substr($nonce, 16, 8); |
|
|
980 |
|
|
|
981 |
/** @var string $block0 */ |
|
|
982 |
$block0 = ParagonIE_Sodium_Core_Salsa20::salsa20( |
|
|
983 |
64, |
|
|
984 |
ParagonIE_Sodium_Core_Util::substr($nonce, 16, 8), |
|
|
985 |
$subkey |
|
|
986 |
); |
|
|
987 |
|
|
|
988 |
/* Verify the Poly1305 MAC -before- attempting to decrypt! */ |
|
|
989 |
$state = new ParagonIE_Sodium_Core_Poly1305_State(self::substr($block0, 0, 32)); |
|
|
990 |
if (!self::onetimeauth_verify($state, $ifp, $tag, $mlen)) { |
|
|
991 |
throw new SodiumException('Invalid MAC'); |
|
|
992 |
} |
|
|
993 |
|
|
|
994 |
/* |
|
|
995 |
* Set the cursor to the end of the first half-block. All future bytes will |
|
|
996 |
* generated from salsa20_xor_ic, starting from 1 (second block). |
|
|
997 |
*/ |
|
|
998 |
$first32 = fread($ifp, 32); |
|
|
999 |
if (!is_string($first32)) { |
|
|
1000 |
throw new SodiumException('Could not read input file'); |
|
|
1001 |
} |
|
|
1002 |
$first32len = self::strlen($first32); |
|
|
1003 |
fwrite( |
|
|
1004 |
$ofp, |
|
|
1005 |
self::xorStrings( |
|
|
1006 |
self::substr($block0, 32, $first32len), |
|
|
1007 |
self::substr($first32, 0, $first32len) |
|
|
1008 |
) |
|
|
1009 |
); |
|
|
1010 |
$mlen -= 32; |
|
|
1011 |
|
|
|
1012 |
/** @var int $iter */ |
|
|
1013 |
$iter = 1; |
|
|
1014 |
|
|
|
1015 |
/** @var int $incr */ |
|
|
1016 |
$incr = self::BUFFER_SIZE >> 6; |
|
|
1017 |
|
|
|
1018 |
/* Decrypts ciphertext, writes to output file. */ |
|
|
1019 |
while ($mlen > 0) { |
|
|
1020 |
$blockSize = $mlen > self::BUFFER_SIZE |
|
|
1021 |
? self::BUFFER_SIZE |
|
|
1022 |
: $mlen; |
|
|
1023 |
$ciphertext = fread($ifp, $blockSize); |
|
|
1024 |
if (!is_string($ciphertext)) { |
|
|
1025 |
throw new SodiumException('Could not read input file'); |
|
|
1026 |
} |
|
|
1027 |
$pBlock = ParagonIE_Sodium_Core_Salsa20::salsa20_xor_ic( |
|
|
1028 |
$ciphertext, |
|
|
1029 |
$realNonce, |
|
|
1030 |
$iter, |
|
|
1031 |
$subkey |
|
|
1032 |
); |
|
|
1033 |
fwrite($ofp, $pBlock, $blockSize); |
|
|
1034 |
$mlen -= $blockSize; |
|
|
1035 |
$iter += $incr; |
|
|
1036 |
} |
|
|
1037 |
return true; |
|
|
1038 |
} |
|
|
1039 |
|
|
|
1040 |
/** |
|
|
1041 |
* @param ParagonIE_Sodium_Core_Poly1305_State $state |
|
|
1042 |
* @param resource $ifp |
|
|
1043 |
* @param string $tag |
|
|
1044 |
* @param int $mlen |
|
|
1045 |
* @return bool |
|
|
1046 |
* @throws SodiumException |
|
|
1047 |
* @throws TypeError |
|
|
1048 |
*/ |
|
|
1049 |
protected static function onetimeauth_verify( |
|
|
1050 |
ParagonIE_Sodium_Core_Poly1305_State $state, |
|
|
1051 |
$ifp, |
|
|
1052 |
$tag = '', |
|
|
1053 |
$mlen = 0 |
|
|
1054 |
) { |
|
|
1055 |
/** @var int $pos */ |
|
16
|
1056 |
$pos = self::ftell($ifp); |
|
9
|
1057 |
|
|
|
1058 |
/** @var int $iter */ |
|
|
1059 |
$iter = 1; |
|
|
1060 |
|
|
|
1061 |
/** @var int $incr */ |
|
|
1062 |
$incr = self::BUFFER_SIZE >> 6; |
|
|
1063 |
|
|
|
1064 |
while ($mlen > 0) { |
|
|
1065 |
$blockSize = $mlen > self::BUFFER_SIZE |
|
|
1066 |
? self::BUFFER_SIZE |
|
|
1067 |
: $mlen; |
|
|
1068 |
$ciphertext = fread($ifp, $blockSize); |
|
|
1069 |
if (!is_string($ciphertext)) { |
|
|
1070 |
throw new SodiumException('Could not read input file'); |
|
|
1071 |
} |
|
|
1072 |
$state->update($ciphertext); |
|
|
1073 |
$mlen -= $blockSize; |
|
|
1074 |
$iter += $incr; |
|
|
1075 |
} |
|
|
1076 |
$res = ParagonIE_Sodium_Core_Util::verify_16($tag, $state->finish()); |
|
|
1077 |
|
|
|
1078 |
fseek($ifp, $pos, SEEK_SET); |
|
|
1079 |
return $res; |
|
|
1080 |
} |
|
|
1081 |
|
|
|
1082 |
/** |
|
|
1083 |
* Update a hash context with the contents of a file, without |
|
|
1084 |
* loading the entire file into memory. |
|
|
1085 |
* |
|
18
|
1086 |
* @param resource|HashContext $hash |
|
9
|
1087 |
* @param resource $fp |
|
|
1088 |
* @param int $size |
|
|
1089 |
* @return resource|object Resource on PHP < 7.2, HashContext object on PHP >= 7.2 |
|
|
1090 |
* @throws SodiumException |
|
|
1091 |
* @throws TypeError |
|
|
1092 |
* @psalm-suppress PossiblyInvalidArgument |
|
|
1093 |
* PHP 7.2 changes from a resource to an object, |
|
|
1094 |
* which causes Psalm to complain about an error. |
|
|
1095 |
* @psalm-suppress TypeCoercion |
|
|
1096 |
* Ditto. |
|
|
1097 |
*/ |
|
|
1098 |
public static function updateHashWithFile($hash, $fp, $size = 0) |
|
|
1099 |
{ |
|
|
1100 |
/* Type checks: */ |
|
|
1101 |
if (PHP_VERSION_ID < 70200) { |
|
|
1102 |
if (!is_resource($hash)) { |
|
|
1103 |
throw new TypeError('Argument 1 must be a resource, ' . gettype($hash) . ' given.'); |
|
|
1104 |
} |
|
|
1105 |
} else { |
|
|
1106 |
if (!is_object($hash)) { |
|
|
1107 |
throw new TypeError('Argument 1 must be an object (PHP 7.2+), ' . gettype($hash) . ' given.'); |
|
|
1108 |
} |
|
|
1109 |
} |
|
|
1110 |
|
|
|
1111 |
if (!is_resource($fp)) { |
|
|
1112 |
throw new TypeError('Argument 2 must be a resource, ' . gettype($fp) . ' given.'); |
|
|
1113 |
} |
|
|
1114 |
if (!is_int($size)) { |
|
|
1115 |
throw new TypeError('Argument 3 must be an integer, ' . gettype($size) . ' given.'); |
|
|
1116 |
} |
|
|
1117 |
|
|
|
1118 |
/** @var int $originalPosition */ |
|
16
|
1119 |
$originalPosition = self::ftell($fp); |
|
9
|
1120 |
|
|
|
1121 |
// Move file pointer to beginning of file |
|
|
1122 |
fseek($fp, 0, SEEK_SET); |
|
|
1123 |
for ($i = 0; $i < $size; $i += self::BUFFER_SIZE) { |
|
|
1124 |
/** @var string|bool $message */ |
|
|
1125 |
$message = fread( |
|
|
1126 |
$fp, |
|
|
1127 |
($size - $i) > self::BUFFER_SIZE |
|
|
1128 |
? $size - $i |
|
|
1129 |
: self::BUFFER_SIZE |
|
|
1130 |
); |
|
|
1131 |
if (!is_string($message)) { |
|
|
1132 |
throw new SodiumException('Unexpected error reading from file.'); |
|
|
1133 |
} |
|
|
1134 |
/** @var string $message */ |
|
|
1135 |
/** @psalm-suppress InvalidArgument */ |
|
18
|
1136 |
self::hash_update($hash, $message); |
|
9
|
1137 |
} |
|
|
1138 |
// Reset file pointer's position |
|
|
1139 |
fseek($fp, $originalPosition, SEEK_SET); |
|
|
1140 |
return $hash; |
|
|
1141 |
} |
|
|
1142 |
|
|
|
1143 |
/** |
|
|
1144 |
* Sign a file (rather than a string). Uses less memory than |
|
|
1145 |
* ParagonIE_Sodium_Compat::crypto_sign_detached(), but produces |
|
|
1146 |
* the same result. (32-bit) |
|
|
1147 |
* |
|
|
1148 |
* @param string $filePath Absolute path to a file on the filesystem |
|
|
1149 |
* @param string $secretKey Secret signing key |
|
|
1150 |
* |
|
|
1151 |
* @return string Ed25519 signature |
|
|
1152 |
* @throws SodiumException |
|
|
1153 |
* @throws TypeError |
|
|
1154 |
*/ |
|
|
1155 |
private static function sign_core32($filePath, $secretKey) |
|
|
1156 |
{ |
|
|
1157 |
/** @var int|bool $size */ |
|
|
1158 |
$size = filesize($filePath); |
|
|
1159 |
if (!is_int($size)) { |
|
|
1160 |
throw new SodiumException('Could not obtain the file size'); |
|
|
1161 |
} |
|
|
1162 |
/** @var int $size */ |
|
|
1163 |
|
|
|
1164 |
/** @var resource|bool $fp */ |
|
|
1165 |
$fp = fopen($filePath, 'rb'); |
|
|
1166 |
if (!is_resource($fp)) { |
|
|
1167 |
throw new SodiumException('Could not open input file for reading'); |
|
|
1168 |
} |
|
|
1169 |
/** @var resource $fp */ |
|
|
1170 |
|
|
|
1171 |
/** @var string $az */ |
|
|
1172 |
$az = hash('sha512', self::substr($secretKey, 0, 32), true); |
|
|
1173 |
|
|
|
1174 |
$az[0] = self::intToChr(self::chrToInt($az[0]) & 248); |
|
|
1175 |
$az[31] = self::intToChr((self::chrToInt($az[31]) & 63) | 64); |
|
|
1176 |
|
|
|
1177 |
$hs = hash_init('sha512'); |
|
18
|
1178 |
self::hash_update($hs, self::substr($az, 32, 32)); |
|
9
|
1179 |
/** @var resource $hs */ |
|
|
1180 |
$hs = self::updateHashWithFile($hs, $fp, $size); |
|
|
1181 |
|
|
|
1182 |
/** @var string $nonceHash */ |
|
|
1183 |
$nonceHash = hash_final($hs, true); |
|
|
1184 |
|
|
|
1185 |
/** @var string $pk */ |
|
|
1186 |
$pk = self::substr($secretKey, 32, 32); |
|
|
1187 |
|
|
|
1188 |
/** @var string $nonce */ |
|
|
1189 |
$nonce = ParagonIE_Sodium_Core32_Ed25519::sc_reduce($nonceHash) . self::substr($nonceHash, 32); |
|
|
1190 |
|
|
|
1191 |
/** @var string $sig */ |
|
|
1192 |
$sig = ParagonIE_Sodium_Core32_Ed25519::ge_p3_tobytes( |
|
|
1193 |
ParagonIE_Sodium_Core32_Ed25519::ge_scalarmult_base($nonce) |
|
|
1194 |
); |
|
|
1195 |
|
|
|
1196 |
$hs = hash_init('sha512'); |
|
18
|
1197 |
self::hash_update($hs, self::substr($sig, 0, 32)); |
|
|
1198 |
self::hash_update($hs, self::substr($pk, 0, 32)); |
|
9
|
1199 |
/** @var resource $hs */ |
|
|
1200 |
$hs = self::updateHashWithFile($hs, $fp, $size); |
|
|
1201 |
|
|
|
1202 |
/** @var string $hramHash */ |
|
|
1203 |
$hramHash = hash_final($hs, true); |
|
|
1204 |
|
|
|
1205 |
/** @var string $hram */ |
|
|
1206 |
$hram = ParagonIE_Sodium_Core32_Ed25519::sc_reduce($hramHash); |
|
|
1207 |
|
|
|
1208 |
/** @var string $sigAfter */ |
|
|
1209 |
$sigAfter = ParagonIE_Sodium_Core32_Ed25519::sc_muladd($hram, $az, $nonce); |
|
|
1210 |
|
|
|
1211 |
/** @var string $sig */ |
|
|
1212 |
$sig = self::substr($sig, 0, 32) . self::substr($sigAfter, 0, 32); |
|
|
1213 |
|
|
|
1214 |
try { |
|
|
1215 |
ParagonIE_Sodium_Compat::memzero($az); |
|
|
1216 |
} catch (SodiumException $ex) { |
|
|
1217 |
$az = null; |
|
|
1218 |
} |
|
|
1219 |
fclose($fp); |
|
|
1220 |
return $sig; |
|
|
1221 |
} |
|
|
1222 |
|
|
|
1223 |
/** |
|
|
1224 |
* |
|
|
1225 |
* Verify a file (rather than a string). Uses less memory than |
|
|
1226 |
* ParagonIE_Sodium_Compat::crypto_sign_verify_detached(), but |
|
|
1227 |
* produces the same result. (32-bit) |
|
|
1228 |
* |
|
|
1229 |
* @param string $sig Ed25519 signature |
|
|
1230 |
* @param string $filePath Absolute path to a file on the filesystem |
|
|
1231 |
* @param string $publicKey Signing public key |
|
|
1232 |
* |
|
|
1233 |
* @return bool |
|
|
1234 |
* @throws SodiumException |
|
|
1235 |
* @throws Exception |
|
|
1236 |
*/ |
|
|
1237 |
public static function verify_core32($sig, $filePath, $publicKey) |
|
|
1238 |
{ |
|
|
1239 |
/* Security checks */ |
|
|
1240 |
if (ParagonIE_Sodium_Core32_Ed25519::check_S_lt_L(self::substr($sig, 32, 32))) { |
|
|
1241 |
throw new SodiumException('S < L - Invalid signature'); |
|
|
1242 |
} |
|
|
1243 |
if (ParagonIE_Sodium_Core32_Ed25519::small_order($sig)) { |
|
|
1244 |
throw new SodiumException('Signature is on too small of an order'); |
|
|
1245 |
} |
|
|
1246 |
if ((self::chrToInt($sig[63]) & 224) !== 0) { |
|
|
1247 |
throw new SodiumException('Invalid signature'); |
|
|
1248 |
} |
|
|
1249 |
$d = 0; |
|
|
1250 |
for ($i = 0; $i < 32; ++$i) { |
|
|
1251 |
$d |= self::chrToInt($publicKey[$i]); |
|
|
1252 |
} |
|
|
1253 |
if ($d === 0) { |
|
|
1254 |
throw new SodiumException('All zero public key'); |
|
|
1255 |
} |
|
|
1256 |
|
|
|
1257 |
/** @var int|bool $size */ |
|
|
1258 |
$size = filesize($filePath); |
|
|
1259 |
if (!is_int($size)) { |
|
|
1260 |
throw new SodiumException('Could not obtain the file size'); |
|
|
1261 |
} |
|
|
1262 |
/** @var int $size */ |
|
|
1263 |
|
|
|
1264 |
/** @var resource|bool $fp */ |
|
|
1265 |
$fp = fopen($filePath, 'rb'); |
|
|
1266 |
if (!is_resource($fp)) { |
|
|
1267 |
throw new SodiumException('Could not open input file for reading'); |
|
|
1268 |
} |
|
|
1269 |
/** @var resource $fp */ |
|
|
1270 |
|
|
|
1271 |
/** @var bool The original value of ParagonIE_Sodium_Compat::$fastMult */ |
|
|
1272 |
$orig = ParagonIE_Sodium_Compat::$fastMult; |
|
|
1273 |
|
|
|
1274 |
// Set ParagonIE_Sodium_Compat::$fastMult to true to speed up verification. |
|
|
1275 |
ParagonIE_Sodium_Compat::$fastMult = true; |
|
|
1276 |
|
|
|
1277 |
/** @var ParagonIE_Sodium_Core32_Curve25519_Ge_P3 $A */ |
|
|
1278 |
$A = ParagonIE_Sodium_Core32_Ed25519::ge_frombytes_negate_vartime($publicKey); |
|
|
1279 |
|
|
|
1280 |
$hs = hash_init('sha512'); |
|
18
|
1281 |
self::hash_update($hs, self::substr($sig, 0, 32)); |
|
|
1282 |
self::hash_update($hs, self::substr($publicKey, 0, 32)); |
|
9
|
1283 |
/** @var resource $hs */ |
|
|
1284 |
$hs = self::updateHashWithFile($hs, $fp, $size); |
|
|
1285 |
/** @var string $hDigest */ |
|
|
1286 |
$hDigest = hash_final($hs, true); |
|
|
1287 |
|
|
|
1288 |
/** @var string $h */ |
|
|
1289 |
$h = ParagonIE_Sodium_Core32_Ed25519::sc_reduce($hDigest) . self::substr($hDigest, 32); |
|
|
1290 |
|
|
|
1291 |
/** @var ParagonIE_Sodium_Core32_Curve25519_Ge_P2 $R */ |
|
|
1292 |
$R = ParagonIE_Sodium_Core32_Ed25519::ge_double_scalarmult_vartime( |
|
|
1293 |
$h, |
|
|
1294 |
$A, |
|
|
1295 |
self::substr($sig, 32) |
|
|
1296 |
); |
|
|
1297 |
|
|
|
1298 |
/** @var string $rcheck */ |
|
|
1299 |
$rcheck = ParagonIE_Sodium_Core32_Ed25519::ge_tobytes($R); |
|
|
1300 |
|
|
|
1301 |
// Close the file handle |
|
|
1302 |
fclose($fp); |
|
|
1303 |
|
|
|
1304 |
// Reset ParagonIE_Sodium_Compat::$fastMult to what it was before. |
|
|
1305 |
ParagonIE_Sodium_Compat::$fastMult = $orig; |
|
|
1306 |
return self::verify_32($rcheck, self::substr($sig, 0, 32)); |
|
|
1307 |
} |
|
|
1308 |
|
|
|
1309 |
/** |
|
|
1310 |
* Encrypt a file (32-bit) |
|
|
1311 |
* |
|
|
1312 |
* @param resource $ifp |
|
|
1313 |
* @param resource $ofp |
|
|
1314 |
* @param int $mlen |
|
|
1315 |
* @param string $nonce |
|
|
1316 |
* @param string $key |
|
|
1317 |
* @return bool |
|
|
1318 |
* @throws SodiumException |
|
|
1319 |
* @throws TypeError |
|
|
1320 |
*/ |
|
|
1321 |
protected static function secretbox_encrypt_core32($ifp, $ofp, $mlen, $nonce, $key) |
|
|
1322 |
{ |
|
|
1323 |
$plaintext = fread($ifp, 32); |
|
|
1324 |
if (!is_string($plaintext)) { |
|
|
1325 |
throw new SodiumException('Could not read input file'); |
|
|
1326 |
} |
|
16
|
1327 |
$first32 = self::ftell($ifp); |
|
9
|
1328 |
|
|
|
1329 |
/** @var string $subkey */ |
|
|
1330 |
$subkey = ParagonIE_Sodium_Core32_HSalsa20::hsalsa20($nonce, $key); |
|
|
1331 |
|
|
|
1332 |
/** @var string $realNonce */ |
|
|
1333 |
$realNonce = ParagonIE_Sodium_Core32_Util::substr($nonce, 16, 8); |
|
|
1334 |
|
|
|
1335 |
/** @var string $block0 */ |
|
|
1336 |
$block0 = str_repeat("\x00", 32); |
|
|
1337 |
|
|
|
1338 |
/** @var int $mlen - Length of the plaintext message */ |
|
|
1339 |
$mlen0 = $mlen; |
|
|
1340 |
if ($mlen0 > 64 - ParagonIE_Sodium_Crypto::secretbox_xsalsa20poly1305_ZEROBYTES) { |
|
|
1341 |
$mlen0 = 64 - ParagonIE_Sodium_Crypto::secretbox_xsalsa20poly1305_ZEROBYTES; |
|
|
1342 |
} |
|
|
1343 |
$block0 .= ParagonIE_Sodium_Core32_Util::substr($plaintext, 0, $mlen0); |
|
|
1344 |
|
|
|
1345 |
/** @var string $block0 */ |
|
|
1346 |
$block0 = ParagonIE_Sodium_Core32_Salsa20::salsa20_xor( |
|
|
1347 |
$block0, |
|
|
1348 |
$realNonce, |
|
|
1349 |
$subkey |
|
|
1350 |
); |
|
|
1351 |
|
|
|
1352 |
$state = new ParagonIE_Sodium_Core32_Poly1305_State( |
|
|
1353 |
ParagonIE_Sodium_Core32_Util::substr( |
|
|
1354 |
$block0, |
|
|
1355 |
0, |
|
|
1356 |
ParagonIE_Sodium_Crypto::onetimeauth_poly1305_KEYBYTES |
|
|
1357 |
) |
|
|
1358 |
); |
|
|
1359 |
|
|
|
1360 |
// Pre-write 16 blank bytes for the Poly1305 tag |
|
16
|
1361 |
$start = self::ftell($ofp); |
|
9
|
1362 |
fwrite($ofp, str_repeat("\x00", 16)); |
|
|
1363 |
|
|
|
1364 |
/** @var string $c */ |
|
|
1365 |
$cBlock = ParagonIE_Sodium_Core32_Util::substr( |
|
|
1366 |
$block0, |
|
|
1367 |
ParagonIE_Sodium_Crypto::secretbox_xsalsa20poly1305_ZEROBYTES |
|
|
1368 |
); |
|
|
1369 |
$state->update($cBlock); |
|
|
1370 |
fwrite($ofp, $cBlock); |
|
|
1371 |
$mlen -= 32; |
|
|
1372 |
|
|
|
1373 |
/** @var int $iter */ |
|
|
1374 |
$iter = 1; |
|
|
1375 |
|
|
|
1376 |
/** @var int $incr */ |
|
|
1377 |
$incr = self::BUFFER_SIZE >> 6; |
|
|
1378 |
|
|
|
1379 |
/* |
|
|
1380 |
* Set the cursor to the end of the first half-block. All future bytes will |
|
|
1381 |
* generated from salsa20_xor_ic, starting from 1 (second block). |
|
|
1382 |
*/ |
|
|
1383 |
fseek($ifp, $first32, SEEK_SET); |
|
|
1384 |
|
|
|
1385 |
while ($mlen > 0) { |
|
|
1386 |
$blockSize = $mlen > self::BUFFER_SIZE |
|
|
1387 |
? self::BUFFER_SIZE |
|
|
1388 |
: $mlen; |
|
|
1389 |
$plaintext = fread($ifp, $blockSize); |
|
|
1390 |
if (!is_string($plaintext)) { |
|
|
1391 |
throw new SodiumException('Could not read input file'); |
|
|
1392 |
} |
|
|
1393 |
$cBlock = ParagonIE_Sodium_Core32_Salsa20::salsa20_xor_ic( |
|
|
1394 |
$plaintext, |
|
|
1395 |
$realNonce, |
|
|
1396 |
$iter, |
|
|
1397 |
$subkey |
|
|
1398 |
); |
|
|
1399 |
fwrite($ofp, $cBlock, $blockSize); |
|
|
1400 |
$state->update($cBlock); |
|
|
1401 |
|
|
|
1402 |
$mlen -= $blockSize; |
|
|
1403 |
$iter += $incr; |
|
|
1404 |
} |
|
|
1405 |
try { |
|
|
1406 |
ParagonIE_Sodium_Compat::memzero($block0); |
|
|
1407 |
ParagonIE_Sodium_Compat::memzero($subkey); |
|
|
1408 |
} catch (SodiumException $ex) { |
|
|
1409 |
$block0 = null; |
|
|
1410 |
$subkey = null; |
|
|
1411 |
} |
|
16
|
1412 |
$end = self::ftell($ofp); |
|
9
|
1413 |
|
|
|
1414 |
/* |
|
|
1415 |
* Write the Poly1305 authentication tag that provides integrity |
|
|
1416 |
* over the ciphertext (encrypt-then-MAC) |
|
|
1417 |
*/ |
|
|
1418 |
fseek($ofp, $start, SEEK_SET); |
|
|
1419 |
fwrite($ofp, $state->finish(), ParagonIE_Sodium_Compat::CRYPTO_SECRETBOX_MACBYTES); |
|
|
1420 |
fseek($ofp, $end, SEEK_SET); |
|
|
1421 |
unset($state); |
|
|
1422 |
|
|
|
1423 |
return true; |
|
|
1424 |
} |
|
|
1425 |
|
|
|
1426 |
/** |
|
|
1427 |
* Decrypt a file (32-bit) |
|
|
1428 |
* |
|
|
1429 |
* @param resource $ifp |
|
|
1430 |
* @param resource $ofp |
|
|
1431 |
* @param int $mlen |
|
|
1432 |
* @param string $nonce |
|
|
1433 |
* @param string $key |
|
|
1434 |
* @return bool |
|
|
1435 |
* @throws SodiumException |
|
|
1436 |
* @throws TypeError |
|
|
1437 |
*/ |
|
|
1438 |
protected static function secretbox_decrypt_core32($ifp, $ofp, $mlen, $nonce, $key) |
|
|
1439 |
{ |
|
|
1440 |
$tag = fread($ifp, 16); |
|
|
1441 |
if (!is_string($tag)) { |
|
|
1442 |
throw new SodiumException('Could not read input file'); |
|
|
1443 |
} |
|
|
1444 |
|
|
|
1445 |
/** @var string $subkey */ |
|
|
1446 |
$subkey = ParagonIE_Sodium_Core32_HSalsa20::hsalsa20($nonce, $key); |
|
|
1447 |
|
|
|
1448 |
/** @var string $realNonce */ |
|
|
1449 |
$realNonce = ParagonIE_Sodium_Core32_Util::substr($nonce, 16, 8); |
|
|
1450 |
|
|
|
1451 |
/** @var string $block0 */ |
|
|
1452 |
$block0 = ParagonIE_Sodium_Core32_Salsa20::salsa20( |
|
|
1453 |
64, |
|
|
1454 |
ParagonIE_Sodium_Core32_Util::substr($nonce, 16, 8), |
|
|
1455 |
$subkey |
|
|
1456 |
); |
|
|
1457 |
|
|
|
1458 |
/* Verify the Poly1305 MAC -before- attempting to decrypt! */ |
|
|
1459 |
$state = new ParagonIE_Sodium_Core32_Poly1305_State(self::substr($block0, 0, 32)); |
|
|
1460 |
if (!self::onetimeauth_verify_core32($state, $ifp, $tag, $mlen)) { |
|
|
1461 |
throw new SodiumException('Invalid MAC'); |
|
|
1462 |
} |
|
|
1463 |
|
|
|
1464 |
/* |
|
|
1465 |
* Set the cursor to the end of the first half-block. All future bytes will |
|
|
1466 |
* generated from salsa20_xor_ic, starting from 1 (second block). |
|
|
1467 |
*/ |
|
|
1468 |
$first32 = fread($ifp, 32); |
|
|
1469 |
if (!is_string($first32)) { |
|
|
1470 |
throw new SodiumException('Could not read input file'); |
|
|
1471 |
} |
|
|
1472 |
$first32len = self::strlen($first32); |
|
|
1473 |
fwrite( |
|
|
1474 |
$ofp, |
|
|
1475 |
self::xorStrings( |
|
|
1476 |
self::substr($block0, 32, $first32len), |
|
|
1477 |
self::substr($first32, 0, $first32len) |
|
|
1478 |
) |
|
|
1479 |
); |
|
|
1480 |
$mlen -= 32; |
|
|
1481 |
|
|
|
1482 |
/** @var int $iter */ |
|
|
1483 |
$iter = 1; |
|
|
1484 |
|
|
|
1485 |
/** @var int $incr */ |
|
|
1486 |
$incr = self::BUFFER_SIZE >> 6; |
|
|
1487 |
|
|
|
1488 |
/* Decrypts ciphertext, writes to output file. */ |
|
|
1489 |
while ($mlen > 0) { |
|
|
1490 |
$blockSize = $mlen > self::BUFFER_SIZE |
|
|
1491 |
? self::BUFFER_SIZE |
|
|
1492 |
: $mlen; |
|
|
1493 |
$ciphertext = fread($ifp, $blockSize); |
|
|
1494 |
if (!is_string($ciphertext)) { |
|
|
1495 |
throw new SodiumException('Could not read input file'); |
|
|
1496 |
} |
|
|
1497 |
$pBlock = ParagonIE_Sodium_Core32_Salsa20::salsa20_xor_ic( |
|
|
1498 |
$ciphertext, |
|
|
1499 |
$realNonce, |
|
|
1500 |
$iter, |
|
|
1501 |
$subkey |
|
|
1502 |
); |
|
|
1503 |
fwrite($ofp, $pBlock, $blockSize); |
|
|
1504 |
$mlen -= $blockSize; |
|
|
1505 |
$iter += $incr; |
|
|
1506 |
} |
|
|
1507 |
return true; |
|
|
1508 |
} |
|
|
1509 |
|
|
|
1510 |
/** |
|
|
1511 |
* One-time message authentication for 32-bit systems |
|
|
1512 |
* |
|
|
1513 |
* @param ParagonIE_Sodium_Core32_Poly1305_State $state |
|
|
1514 |
* @param resource $ifp |
|
|
1515 |
* @param string $tag |
|
|
1516 |
* @param int $mlen |
|
|
1517 |
* @return bool |
|
|
1518 |
* @throws SodiumException |
|
|
1519 |
* @throws TypeError |
|
|
1520 |
*/ |
|
|
1521 |
protected static function onetimeauth_verify_core32( |
|
|
1522 |
ParagonIE_Sodium_Core32_Poly1305_State $state, |
|
|
1523 |
$ifp, |
|
|
1524 |
$tag = '', |
|
|
1525 |
$mlen = 0 |
|
|
1526 |
) { |
|
|
1527 |
/** @var int $pos */ |
|
16
|
1528 |
$pos = self::ftell($ifp); |
|
9
|
1529 |
|
|
|
1530 |
while ($mlen > 0) { |
|
|
1531 |
$blockSize = $mlen > self::BUFFER_SIZE |
|
|
1532 |
? self::BUFFER_SIZE |
|
|
1533 |
: $mlen; |
|
|
1534 |
$ciphertext = fread($ifp, $blockSize); |
|
|
1535 |
if (!is_string($ciphertext)) { |
|
|
1536 |
throw new SodiumException('Could not read input file'); |
|
|
1537 |
} |
|
|
1538 |
$state->update($ciphertext); |
|
|
1539 |
$mlen -= $blockSize; |
|
|
1540 |
} |
|
|
1541 |
$res = ParagonIE_Sodium_Core32_Util::verify_16($tag, $state->finish()); |
|
|
1542 |
|
|
|
1543 |
fseek($ifp, $pos, SEEK_SET); |
|
|
1544 |
return $res; |
|
|
1545 |
} |
|
16
|
1546 |
|
|
|
1547 |
/** |
|
|
1548 |
* @param resource $resource |
|
|
1549 |
* @return int |
|
|
1550 |
* @throws SodiumException |
|
|
1551 |
*/ |
|
|
1552 |
private static function ftell($resource) |
|
|
1553 |
{ |
|
|
1554 |
$return = ftell($resource); |
|
|
1555 |
if (!is_int($return)) { |
|
|
1556 |
throw new SodiumException('ftell() returned false'); |
|
|
1557 |
} |
|
|
1558 |
return (int) $return; |
|
|
1559 |
} |
|
9
|
1560 |
} |