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<?php |
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/** |
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* Trait implementation of the block cipher capabilities and actions for symmetric encryption algorithms. |
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*/ |
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namespace CryptoManana\Core\Traits\MessageEncryption; |
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use \CryptoManana\Core\Interfaces\MessageEncryption\BlockOperationsInterface as BlockOperationsSpecification; |
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/** |
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* Trait BlockOperationsTrait - Reusable implementation of `BlockOperationsInterface`. |
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* |
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* @see \CryptoManana\Core\Interfaces\MessageDigestion\BlockOperationsInterface The abstract specification. |
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* |
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* @package CryptoManana\Core\Traits\MessageEncryption |
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* |
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* @property string $iv The initialization vector (IV) string property storage. |
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* @property string $mode The block encryption operation mode string property. |
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* @property int $padding The final block padding operation property. |
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* |
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* @mixin BlockOperationsSpecification |
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*/ |
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trait BlockOperationsTrait |
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{ |
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/** |
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* Setter for the initialization vector (IV) string property. |
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* |
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* @param string $iv The initialization vector (IV) string. |
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* |
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* @return $this The encryption algorithm object. |
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* @throws \Exception Validation errors. |
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*/ |
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public function setInitializationVector($iv) |
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{ |
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if (!is_string($iv)) { |
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throw new \InvalidArgumentException('The initialization vector must be a string or a binary string.'); |
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} |
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/** |
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* {@internal The encryption standard is 8-bit wise (don not use StringBuilder) and utilizes performance. }} |
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*/ |
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if (strlen($iv) > static::IV_SIZE) { |
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$iv = hash_hkdf('sha256', $iv, static::IV_SIZE, 'CryptoMañana', ''); |
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} elseif (strlen($iv) < static::IV_SIZE) { |
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$iv = str_pad($iv, static::IV_SIZE, "\x0", STR_PAD_RIGHT); |
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} |
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$this->iv = $iv; |
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return $this; |
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} |
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/** |
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* Getter for the initialization vector (IV) string property. |
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* |
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* @return string The initialization vector (IV) string. |
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*/ |
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public function getInitializationVector() |
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{ |
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return $this->iv; |
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} |
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/** |
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* Setter for the block encryption operation mode string property. |
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* |
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* @param string $mode The block operation mode string. |
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* |
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* @return $this The encryption algorithm object. |
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* @throws \Exception Validation errors. |
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*/ |
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public function setBlockOperationMode($mode) |
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{ |
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$validModes = [ |
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self::CBC_MODE, |
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self::CFB_MODE, |
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self::OFB_MODE, |
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self::CTR_MODE, |
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self::ECB_MODE |
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]; |
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if (!is_string($mode) || !in_array(strtoupper($mode), $validModes, true)) { |
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throw new \InvalidArgumentException( |
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'The mode of operation must be a string and be a standardized block mode name.' |
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); |
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} |
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$newMethodName = static::ALGORITHM_NAME . '-' . (static::KEY_SIZE * 8) . '-' . $mode; |
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// @codeCoverageIgnoreStart |
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if (!in_array($newMethodName, openssl_get_cipher_methods(), true)) { |
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throw new \RuntimeException( |
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'The algorithm `' . $newMethodName . '`is not supported under the current system configuration.' |
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); |
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} |
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// @codeCoverageIgnoreEnd |
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$this->mode = strtoupper($mode); |
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return $this; |
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} |
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/** |
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* Getter for the block encryption operation mode string property. |
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* |
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* @return string The block operation mode string. |
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*/ |
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public function getBlockOperationMode() |
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{ |
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return $this->mode; |
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} |
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/** |
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* Setter for the final block padding operation property. |
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* |
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* @param int $padding The padding standard integer code value. |
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* |
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* @return $this The encryption algorithm object. |
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* @throws \Exception Validation errors. |
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*/ |
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public function setPaddingStandard($padding) |
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{ |
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$padding = filter_var( |
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$padding, |
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FILTER_VALIDATE_INT, |
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[ |
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"options" => [ |
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"min_range" => self::PKCS7_PADDING, |
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"max_range" => self::ZERO_PADDING, |
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], |
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] |
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); |
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if ($padding === false) { |
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throw new \InvalidArgumentException( |
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'The padding standard must must be a valid integer between ' . |
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self::PKCS7_PADDING . ' and ' . self::ZERO_PADDING . '.' |
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); |
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} |
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$this->padding = $padding; |
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return $this; |
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} |
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/** |
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* Getter for the final block padding operation property. |
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* |
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* @return string The padding standard integer code value. |
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*/ |
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public function getPaddingStandard() |
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{ |
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return $this->padding; |
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} |
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} |
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TonyKaravasilev /
CryptoManana
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