Set parameters of qChecksum

[moravas]

Hi Folks,

I need to generate checksum for an array of data. Its stored in QByteArray, and as I googled, I found the qChecksum method, but I couldnot figure out, how should I set the parameters for CRC, like:

• applied algorithm
• seed
• polinome
• etc...

can anybody explain me, how I can use this method, or is there any alternative Qt solution for CRC generation?

Regards,
Norbert

[hpollak]

There are no more Parameters to set in qChecksum see Documentation:

quint16 qChecksum(const char * data, uint len)

Returns the CRC-16 checksum of the first len bytes of data.

The checksum is independent of the byte order (endianness).

**Note: This function is a 16-bit cache conserving (16 entry table) implementation of the CRC-16-CCITT algorithm.
**

But maybe you can use QCryptographicHash Class

Currently MD4, MD5, SHA-1, SHA-224, SHA-256, SHA-384, and SHA-512 are supported.

[moravas]

Hi,

I read the description of the method, but you can check for example this bug report:
https://bugreports.qt.io/browse/QTBUG-8595

In order to generate CRC, you need (you can set) to adjust more parameter as the input data.

Regards,
Norbert