def deserialize_td_quotev4()

in cvm-attestation/deserialize_tdx_v4.py [0:0]

• 45 lines of code
• 2 McCabe index (conditional complexity)

def deserialize_td_quotev4(tq_quote):
    """
    Parses the given TD quote object and returns the structured data.
    :param tq_quote: The TD quote binary data.
    :return: Parsed TD Quote structure.
    """
    
    QuoteHeaderv4 = Struct(
        "version" / Int16ul,
        "attestation_key_type" / Int16ul,
        "tee_type" / Bytes(4),
        "reserved_0" / Int16ul,
        "reserved_1" / Int16ul,
        "qe_vendor_id" / Bytes(16),
        "user_data" / Bytes(20)
    )

    TDQuoteBodyv4 = Struct(
    "tee_tcb_svn" / Bytes(16),
    "mrseam" / Bytes(48),
    "mrsignerseam" / Bytes(48),
    "seam_attributes" / Bytes(8),
    "td_attributes" / Bytes(8),
    "xfam" / Int64ul,
    "mr_td" / Bytes(48),
    "mr_config_id" / Bytes(48),
    "mr_owner" / Bytes(48),
    "mr_owner_config" / Bytes(48),
    "rtmr_0" / Bytes(48),
    "rtmr_1" / Bytes(48),
    "rtmr_2" / Bytes(48),
    "rtmr_3" / Bytes(48),
    "report_data" / Bytes(64)
    )

    QuoteSignatureDatav4 = Struct(
        "signature" / Bytes(64),
        "attestation_key" / Bytes(64),
        "qe_certification_data_type" / Bytes(2),
        "cert_data_size" / Int32ul,
        "cert_data" / Bytes(this.cert_data_size)
    )

    TDQuote_V4 = Struct(
    "header" / QuoteHeaderv4,
    "td_quote_body" / TDQuoteBodyv4,
    "quote_signature_data_len" / Int32ul,
    "quote_signature_data" / QuoteSignatureDatav4,
    )

    try:
        return TDQuote_V4.parse(tq_quote)
    except Exception as e:
        print(f"Error parsing TD Quote: {e}", file=sys.stderr)
        return None