QByteArray toHex()

ckvsoft

Hallo

I hope this is the right Forum.

I have troubles with display a QString in Hex.

When i do:

QByteArray ba;
ba.append(reinterpret_cast<const char *>(out), sizeof(out));
QString resultBase63 = ba.toBase64();

i Got a String , i this Case "aj58R5u6PsY="

When i do a decode

QByteArray ba;
ba.append(str);
QString result = QByteArray::fromBase64(ba).toHex();

i got a Hex with "6a3e7c479bba3ec6"

But when i have the encoded String the result is an other false one;

Example;

QByteArray ba;
ba.append(str);
QString result = QByteArray::fromBase64(ba);

QByteArray baResult;
baResult.append(result);
QString resultHex = baResult.toHex();

the Hex is "6a3e7c47efbfbdefbfbd3eefbfbd" (false one)

What is wrong?

Thanx for help Chris

raven-worx

@ckvsoft
sry, for me it's not clear what you want. Why is the result false?
Also it's not clear how the data you pass to append() looks like.

ckvsoft

@raven-worx
Hi

i have a string wich is an base64Encoded String

QString encoded = "aj58R5u6PsY=";
QByteArray ba;
ba.append(encoded);
QString decoded = QByteArray::fromBase64(ba).toHex();

// Here is the Right result
// decoded HEX = 6a3e7c479bba3ec6

But when i do this not in one run

QString encoded = "aj58R5u6PsY=";
QByteArray ba;
ba.append(encoded);

QString decoded = QByteArray::fromBase64(ba);

// than in the next step

QByteArray baDecoded;
ba.append(decoded);

QString decodedHEX = ba.toHex();

// decoded HEX is "6a3e7c47efbfbdefbfbd3eefbfbd" and NOT "6a3e7c479bba3ec6"

Do you now what i meen?

lg Chris

SGaist

Hi and welcome to devnet,

Because you are not consistent in your code.

In the one-liner you are working only with QByteArrays: fromBase64 returns a QByteArray on which you call toHex() which also returns a QByteArray that is then converted into a QString.

On the second version, you put a QByteArray in a QString that you then put back in a QByteArray that you again put in a QString. QString works internally on UTF16 data while QByteArray works on bytes. Don't mix them, work only with QByteArrays in this case.

ckvsoft

@SGaist

Hi

Thanx for welcome and the Hint.

I rewrite some of my function to return QByteArray. Now it works correctly.

lg Chris

SGaist

You're welcome !

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