LEADTOOLS Raster Imaging C DLL Help
| LEADTOOLS Raster Imaging C DLL Help > Quick Reference > Data Types > JPEG 2000 file format structures > L_JP2_DIGITAL_SIGNATURE_BOX |
typedef struct _tagL_JP2_DIGITAL_SIGNATURE_BOX
{
L_UINT32 uStructSize;
L_UINT8 uStyp;
L_UINT8 uPtyp;
L_UINT64 uOFF;
L_UINT64 uLength;
L_UINT8 * pData;
L_SIZE_T uDataSize;
}L_JP2_DIGITAL_SIGNATURE_BOX, *pL_JP2_DIGITAL_SIGNATURE_BOX;
The L_JP2_DIGITAL_SIGNATURE_BOX structure provides information for a Digital Signature box.
|
Member |
Description |
|
uStructSize |
Size of this structure, in bytes. Use the sizeof operator to calculate this value. |
|
uStyp |
Signature type. This field specifies the type of digital signature contained within this Digital Signature box. |
|
uPtyp |
Source pointer type. This field indicates how the source data range that is signed by this Digital signature box is specified. |
|
uOFF |
Source data offset. This field specifies the offset in bytes to the start of the source data range that is signed by this Digital Signature box. |
|
uLength |
Source data Length. If nonzero, this field specifies the length in byte of the source data range the is signed by this Digital Signature box. A value of zero specifies that the end of the source data range is the last byte of the file. |
|
pData |
Signature data. |
|
uDataSize |
The size of signature data. |
Comments
The Digital Signature box contains a checksum or digital signature that may be used to verify data contained within the file. This digital signature is used to protect a very specific byte stream within the file. Any change to that byte stream will invalidate the digital signature. This box is defined in JPX and above file formats. A JPEG 2000 file may contain zero or more Digital Signature boxes.
The L_JP2_DIGITAL_SIGNATURE_BOX structure is used in the following functions:
