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PDFHide

stegobox.codec.PDFHide

Bases: BaseCodec

This module implements steganography of any file in pdf file.

with code shamelessly taken from CyberCommands/StegoPDF

Source code in stegobox/codec/pdfhide.py 
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class PDFHide(BaseCodec):
    """This module implements steganography of any file in `pdf` file.

    with code shamelessly taken from
    [CyberCommands/StegoPDF](https://github.com/CyberCommands/StegoPDF)
    """

    def __init__(self) -> None:
        super().__init__()

    def encode(self, carrier: bytes, payload: bytes) -> bytes:
        """Encoder requires the carrier to be `pdf` file in bytes and the payload to be
        any file in bytes.

        Args:
            carrier: `pdf` file bytes. Read with `stegobox.io.txt.read_bytes()`.
            payload: Any file bytes. Payload (secret file) to be
                encoded. Also read with `stegobox.io.txt.read_bytes()`.

        Returns:
            Encrypted `pdf` file bytes.
        """
        return carrier + binascii.hexlify(payload)

    def decode(self, carrier: bytes) -> bytes:
        """Decode the secret file from the carrier `pdf` file in bytes.

        Args:
            carrier: Encrypted `pdf` file bytes. Read with
                `stegobox.io.txt.read_bytes()`.

        Returns:
            The decoded file in bytes (secret file).
        """
        filecontent = carrier
        filecontentsplit = filecontent.split(bytes("%%EOF", ENCODING))
        filecontent = filecontentsplit[len(filecontentsplit) - 1]
        filecontent = binascii.unhexlify(filecontent.strip())
        return filecontent

encode(carrier, payload)

Encoder requires the carrier to be pdf file in bytes and the payload to be any file in bytes.

Parameters:

Name Type Description Default
carrier bytes

pdf file bytes. Read with stegobox.io.txt.read_bytes().

 required
payload bytes

Any file bytes. Payload (secret file) to be encoded. Also read with stegobox.io.txt.read_bytes().

 required

Returns:

Type Description
bytes

Encrypted pdf file bytes.
Source code in stegobox/codec/pdfhide.py 
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def encode(self, carrier: bytes, payload: bytes) -> bytes:
    """Encoder requires the carrier to be `pdf` file in bytes and the payload to be
    any file in bytes.

    Args:
        carrier: `pdf` file bytes. Read with `stegobox.io.txt.read_bytes()`.
        payload: Any file bytes. Payload (secret file) to be
            encoded. Also read with `stegobox.io.txt.read_bytes()`.

    Returns:
        Encrypted `pdf` file bytes.
    """
    return carrier + binascii.hexlify(payload)

decode(carrier)

Decode the secret file from the carrier pdf file in bytes.

Parameters:

Name Type Description Default
carrier bytes

Encrypted pdf file bytes. Read with stegobox.io.txt.read_bytes().

 required

Returns:

Type Description
bytes

The decoded file in bytes (secret file).
Source code in stegobox/codec/pdfhide.py 
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def decode(self, carrier: bytes) -> bytes:
    """Decode the secret file from the carrier `pdf` file in bytes.

    Args:
        carrier: Encrypted `pdf` file bytes. Read with
            `stegobox.io.txt.read_bytes()`.

    Returns:
        The decoded file in bytes (secret file).
    """
    filecontent = carrier
    filecontentsplit = filecontent.split(bytes("%%EOF", ENCODING))
    filecontent = filecontentsplit[len(filecontentsplit) - 1]
    filecontent = binascii.unhexlify(filecontent.strip())
    return filecontent