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module Rex::Crypto
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  # Returns an encrypted string using AES256-CBC.
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  #
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  # @deprecated Access via Rex::Crypto::Aes256
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  # @param iv [String] Initialization vector.
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  # @param key [String] Secret key.
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  # @return [String] The encrypted string.
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  def self.encrypt_aes256(iv, key, value)
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    Aes256.encrypt_aes256(iv, key, value)
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  end
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  # Returns a decrypted string using AES256-CBC.
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  #
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  # @deprecated Access via Rex::Crypto::Aes256
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  # @param iv [String] Initialization vector.
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  # @param key [String] Secret key.
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  # @return [String] The decrypted string.
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  def self.decrypt_aes256(iv, key, value)
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    Aes256.decrypt_aes256(iv, key, value)
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  end
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  # Returns a decrypted or encrypted RC4 string.
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  #
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  # @deprecated Access via Rex::Crypto::Rc4
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  # @param key [String] Secret key.
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  # @param [String]
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  def self.rc4(key, value)
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    Rc4.rc4(key, value)
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  end
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  # Returns an integer represented as a byte array. Useful for certain key-related operations.
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  #
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  # @param bytes [String] The bytes to convert
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  # @return [Integer] The converted value.
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  def self.bytes_to_int(bytes)
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    bytes.each_byte.reduce(0) { |acc, byte| (acc << 8) | byte }
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  end
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  # Returns a byte array represented as a big-endian integer. Useful for certain key-related operations.
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  #
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  # @param bytes [String] The bytes to convert
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  # @return [Integer] The converted value.
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  def self.int_to_bytes(num)
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    bytes = []
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    while num > 0
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      bytes.unshift(num & 0xff)
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      num >>= 8
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    end
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    bytes.pack("C*")
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  end
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end
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