sop / gcm

examples/encrypt.php

Indentation +1 added lines, -1 removed lines

@@ -23,4 +23,4 @@
 // print the ciphertext along with the authentication tag
 // and the initialization vector
 echo bin2hex($ciphertext) . "\n" . bin2hex($auth_tag) . "\n" . bin2hex($iv) .
-     "\n";
+	 "\n";

examples/explicit-decrypt.php

Indentation +1 added lines, -1 removed lines

@@ -14,7 +14,7 @@
 $key = "012345678901234567890123";
 // read ciphertext, authentication tag and initialization vector from the stdin
 list($ciphertext, $auth_tag, $iv) = array_map("hex2bin",
-    file("php://stdin", FILE_IGNORE_NEW_LINES));
+	file("php://stdin", FILE_IGNORE_NEW_LINES));
 // configure GCM object with AES-192 cipher and 13-bytes long authentication tag
 $gcm = new GCM(new AES192Cipher(), 13);
 // decrypt and authenticate

examples/decrypt.php

Indentation +1 added lines, -1 removed lines

@@ -16,7 +16,7 @@
 $key = "some 128 bit key";
 // read ciphertext, authentication tag and initialization vector from the stdin
 list($ciphertext, $auth_tag, $iv) = array_map("hex2bin",
-    file("php://stdin", FILE_IGNORE_NEW_LINES));
+	file("php://stdin", FILE_IGNORE_NEW_LINES));
 // decrypt and authenticate
 $plaintext = AESGCM::decrypt($ciphertext, $auth_tag, $aad, $key, $iv);
 echo "$plaintext\n";

examples/explicit-encrypt.php

Indentation +1 added lines, -1 removed lines

@@ -23,4 +23,4 @@
 // print the ciphertext along with the authentication tag
 // and the initialization vector
 echo bin2hex($ciphertext) . "\n" . bin2hex($auth_tag) . "\n" . bin2hex($iv) .
-     "\n";
+	 "\n";

lib/GCM/GHASH.php

Indentation +88 added lines, -88 removed lines

@@ -13,97 +13,97 @@
  */
 class GHASH
 {
-    /**
-     * Fixed R-block.
-     *
-     * @var string
-     */
-    const R = "\xE1\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0";
+	/**
+	 * Fixed R-block.
+	 *
+	 * @var string
+	 */
+	const R = "\xE1\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0";
 
-    /**
-     * Hash subkey.
-     *
-     * @var string
-     */
-    protected $_subkey;
+	/**
+	 * Hash subkey.
+	 *
+	 * @var string
+	 */
+	protected $_subkey;
 
-    /**
-     * Constructor.
-     *
-     * @param string $subkey Hash subkey
-     */
-    public function __construct(string $subkey)
-    {
-        if (16 != strlen($subkey)) {
-            throw new \LengthException('Subkey must be 128 bits.');
-        }
-        $this->_subkey = $subkey;
-    }
+	/**
+	 * Constructor.
+	 *
+	 * @param string $subkey Hash subkey
+	 */
+	public function __construct(string $subkey)
+	{
+		if (16 != strlen($subkey)) {
+			throw new \LengthException('Subkey must be 128 bits.');
+		}
+		$this->_subkey = $subkey;
+	}
 
-    /**
-     * Functor method for <code>compute</code>.
-     *
-     * @param string $arg
-     *
-     * @return string
-     */
-    public function __invoke(string $arg): string
-    {
-        return $this->compute($arg);
-    }
+	/**
+	 * Functor method for <code>compute</code>.
+	 *
+	 * @param string $arg
+	 *
+	 * @return string
+	 */
+	public function __invoke(string $arg): string
+	{
+		return $this->compute($arg);
+	}
 
-    /**
-     * Compute hash.
-     *
-     * @param string $X Input string
-     *
-     * @return string Hash
-     */
-    public function compute(string $X): string
-    {
-        $len = strlen($X);
-        if (0 != $len % 16) {
-            throw new \UnexpectedValueException(
-                'Input string must be a multiple of 128 bits.');
-        }
-        $Y = GCM::ZB_128;
-        // number of 128-bit blocks
-        $m = $len >> 4;
-        for ($i = 0; $i < $m; ++$i) {
-            $xi = substr($X, $i << 4, 16);
-            $Y = $this->_mult($Y ^ $xi, $this->_subkey);
-        }
-        return $Y;
-    }
+	/**
+	 * Compute hash.
+	 *
+	 * @param string $X Input string
+	 *
+	 * @return string Hash
+	 */
+	public function compute(string $X): string
+	{
+		$len = strlen($X);
+		if (0 != $len % 16) {
+			throw new \UnexpectedValueException(
+				'Input string must be a multiple of 128 bits.');
+		}
+		$Y = GCM::ZB_128;
+		// number of 128-bit blocks
+		$m = $len >> 4;
+		for ($i = 0; $i < $m; ++$i) {
+			$xi = substr($X, $i << 4, 16);
+			$Y = $this->_mult($Y ^ $xi, $this->_subkey);
+		}
+		return $Y;
+	}
 
-    /**
-     * Apply block multiplication operation.
-     *
-     * See NIST SP-800-38D, chapter 6.3 for the details.
-     *
-     * @param string $X
-     * @param string $Y
-     *
-     * @return string
-     */
-    private function _mult(string $X, string $Y): string
-    {
-        $x = GCM::strToGMP($X);
-        $Z = GCM::strToGMP(GCM::ZB_128);
-        $V = GCM::strToGMP($Y);
-        $R = GCM::strToGMP(self::R);
-        for ($i = 0; $i < 128; ++$i) {
-            // if bit at X[i] is set
-            if (gmp_testbit($x, 127 - $i)) {
-                $Z ^= $V;
-            }
-            // if LSB(Vi) = 0
-            if (!gmp_testbit($V, 0)) {
-                $V >>= 1;
-            } else {
-                $V = ($V >> 1) ^ $R;
-            }
-        }
-        return GCM::gmpToStr($Z, 16);
-    }
+	/**
+	 * Apply block multiplication operation.
+	 *
+	 * See NIST SP-800-38D, chapter 6.3 for the details.
+	 *
+	 * @param string $X
+	 * @param string $Y
+	 *
+	 * @return string
+	 */
+	private function _mult(string $X, string $Y): string
+	{
+		$x = GCM::strToGMP($X);
+		$Z = GCM::strToGMP(GCM::ZB_128);
+		$V = GCM::strToGMP($Y);
+		$R = GCM::strToGMP(self::R);
+		for ($i = 0; $i < 128; ++$i) {
+			// if bit at X[i] is set
+			if (gmp_testbit($x, 127 - $i)) {
+				$Z ^= $V;
+			}
+			// if LSB(Vi) = 0
+			if (!gmp_testbit($V, 0)) {
+				$V >>= 1;
+			} else {
+				$V = ($V >> 1) ^ $R;
+			}
+		}
+		return GCM::gmpToStr($Z, 16);
+	}
 }

Spacing +1 added lines, -1 removed lines

@@ -1,6 +1,6 @@
 <?php
 
-declare(strict_types = 1);
+declare(strict_types=1);
 
 namespace Sop\GCM;
 

lib/GCM/Cipher/Cipher.php

Indentation +9 added lines, -9 removed lines

@@ -9,13 +9,13 @@
  */
 interface Cipher
 {
-    /**
-     * Encrypt data.
-     *
-     * @param string $data Data to encrypt
-     * @param string $key  Encryption key
-     *
-     * @return string Encrypted data
-     */
-    public function encrypt(string $data, string $key): string;
+	/**
+	 * Encrypt data.
+	 *
+	 * @param string $data Data to encrypt
+	 * @param string $key  Encryption key
+	 *
+	 * @return string Encrypted data
+	 */
+	public function encrypt(string $data, string $key): string;
 }

Spacing +1 added lines, -1 removed lines

@@ -1,6 +1,6 @@
 <?php
 
-declare(strict_types = 1);
+declare(strict_types=1);
 
 namespace Sop\GCM\Cipher;
 

lib/GCM/Cipher/AES/AESCipher.php

Indentation +79 added lines, -79 removed lines

@@ -11,88 +11,88 @@
  */
 abstract class AESCipher implements Cipher
 {
-    /**
-     * Mapping from key size in bits to AES cipher implementation class name.
-     *
-     * @internal
-     *
-     * @var array
-     */
-    const MAP_KEYSIZE_TO_CLS = [
-        128 => AES128Cipher::class,
-        192 => AES192Cipher::class,
-        256 => AES256Cipher::class,
-    ];
+	/**
+	 * Mapping from key size in bits to AES cipher implementation class name.
+	 *
+	 * @internal
+	 *
+	 * @var array
+	 */
+	const MAP_KEYSIZE_TO_CLS = [
+		128 => AES128Cipher::class,
+		192 => AES192Cipher::class,
+		256 => AES256Cipher::class,
+	];
 
-    /**
-     * Get AES cipher instance by key length.
-     *
-     * @param int $len Key length in bytes
-     *
-     * @throws \UnexpectedValueException
-     *
-     * @return self
-     */
-    public static function fromKeyLength(int $len): self
-    {
-        $bits = $len << 3;
-        if (!array_key_exists($bits, self::MAP_KEYSIZE_TO_CLS)) {
-            throw new \UnexpectedValueException(
-                "No AES implementation for ${bits}-bit key size.");
-        }
-        $cls = self::MAP_KEYSIZE_TO_CLS[$bits];
-        return new $cls();
-    }
+	/**
+	 * Get AES cipher instance by key length.
+	 *
+	 * @param int $len Key length in bytes
+	 *
+	 * @throws \UnexpectedValueException
+	 *
+	 * @return self
+	 */
+	public static function fromKeyLength(int $len): self
+	{
+		$bits = $len << 3;
+		if (!array_key_exists($bits, self::MAP_KEYSIZE_TO_CLS)) {
+			throw new \UnexpectedValueException(
+				"No AES implementation for ${bits}-bit key size.");
+		}
+		$cls = self::MAP_KEYSIZE_TO_CLS[$bits];
+		return new $cls();
+	}
 
-    /**
-     * @see \Sop\GCM\Cipher\Cipher::encrypt()
-     *
-     * @throws \UnexpectedValueException If key size is incorrect
-     * @throws \RuntimeException         For generic errors
-     *
-     * @return string
-     */
-    public function encrypt(string $data, string $key): string
-    {
-        $key_size = $this->_keySize();
-        if (strlen($key) != $key_size) {
-            throw new \UnexpectedValueException(
-                "Key size must be ${key_size} bytes.");
-        }
-        $result = openssl_encrypt($data, $this->_cipherName(), $key,
-            OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING);
-        if (false === $result) {
-            throw new \RuntimeException(
-                'openssl_encrypt() failed: ' . self::_getLastOpenSSLError());
-        }
-        return $result;
-    }
+	/**
+	 * @see \Sop\GCM\Cipher\Cipher::encrypt()
+	 *
+	 * @throws \UnexpectedValueException If key size is incorrect
+	 * @throws \RuntimeException         For generic errors
+	 *
+	 * @return string
+	 */
+	public function encrypt(string $data, string $key): string
+	{
+		$key_size = $this->_keySize();
+		if (strlen($key) != $key_size) {
+			throw new \UnexpectedValueException(
+				"Key size must be ${key_size} bytes.");
+		}
+		$result = openssl_encrypt($data, $this->_cipherName(), $key,
+			OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING);
+		if (false === $result) {
+			throw new \RuntimeException(
+				'openssl_encrypt() failed: ' . self::_getLastOpenSSLError());
+		}
+		return $result;
+	}
 
-    /**
-     * Get the cipher method name recognized by OpenSSL.
-     *
-     * @return string
-     */
-    abstract protected function _cipherName(): string;
+	/**
+	 * Get the cipher method name recognized by OpenSSL.
+	 *
+	 * @return string
+	 */
+	abstract protected function _cipherName(): string;
 
-    /**
-     * Get the key size in bytes.
-     *
-     * @return int
-     */
-    abstract protected function _keySize(): int;
+	/**
+	 * Get the key size in bytes.
+	 *
+	 * @return int
+	 */
+	abstract protected function _keySize(): int;
 
-    /**
-     * Get latest OpenSSL error message.
-     *
-     * @return string
-     */
-    protected static function _getLastOpenSSLError(): string
-    {
-        $msg = '';
-        while (false !== ($err = openssl_error_string())) {
-            $msg = $err;
-        }
-        return $msg;
-    }
+	/**
+	 * Get latest OpenSSL error message.
+	 *
+	 * @return string
+	 */
+	protected static function _getLastOpenSSLError(): string
+	{
+		$msg = '';
+		while (false !== ($err = openssl_error_string())) {
+			$msg = $err;
+		}
+		return $msg;
+	}
 }

Spacing +1 added lines, -1 removed lines

@@ -1,6 +1,6 @@
 <?php
 
-declare(strict_types = 1);
+declare(strict_types=1);
 
 namespace Sop\GCM\Cipher\AES;
 

lib/GCM/Cipher/AES/AES128Cipher.php

Indentation +14 added lines, -14 removed lines

@@ -9,19 +9,19 @@
  */
 class AES128Cipher extends AESCipher
 {
-    /**
-     * {@inheritdoc}
-     */
-    protected function _cipherName(): string
-    {
-        return 'AES-128-ECB';
-    }
+	/**
+	 * {@inheritdoc}
+	 */
+	protected function _cipherName(): string
+	{
+		return 'AES-128-ECB';
+	}
 
-    /**
-     * {@inheritdoc}
-     */
-    protected function _keySize(): int
-    {
-        return 16;
-    }
+	/**
+	 * {@inheritdoc}
+	 */
+	protected function _keySize(): int
+	{
+		return 16;
+	}
 }

Spacing +1 added lines, -1 removed lines

@@ -1,6 +1,6 @@
 <?php
 
-declare(strict_types = 1);
+declare(strict_types=1);
 
 namespace Sop\GCM\Cipher\AES;
 

lib/GCM/Cipher/AES/AES256Cipher.php

Indentation +14 added lines, -14 removed lines

@@ -9,19 +9,19 @@
  */
 class AES256Cipher extends AESCipher
 {
-    /**
-     * {@inheritdoc}
-     */
-    protected function _cipherName(): string
-    {
-        return 'AES-256-ECB';
-    }
+	/**
+	 * {@inheritdoc}
+	 */
+	protected function _cipherName(): string
+	{
+		return 'AES-256-ECB';
+	}
 
-    /**
-     * {@inheritdoc}
-     */
-    protected function _keySize(): int
-    {
-        return 32;
-    }
+	/**
+	 * {@inheritdoc}
+	 */
+	protected function _keySize(): int
+	{
+		return 32;
+	}
 }

Spacing +1 added lines, -1 removed lines

@@ -1,6 +1,6 @@
 <?php
 
-declare(strict_types = 1);
+declare(strict_types=1);
 
 namespace Sop\GCM\Cipher\AES;