Qt openssl aes lib

[zgulser]

Hi,

I wrote the following enc/dec code;

AES_KEY enc_key, dec_key;
 
	AES_set_encrypt_key((unsigned char*)p_key, 128, &enc_key);
    AES_ecb_encrypt((unsigned char*)textManip, (unsigned char*)enc_out, &enc_key, 1);  
 
    AES_set_decrypt_key((unsigned char*)p_key, 128, &dec_key);
    AES_decrypt((unsigned char*)enc_out, (unsigned char*)dec_out, &dec_key);

AES_KEY enc_key, dec_key;

	AES_set_encrypt_key((unsigned char*)p_key, 128, &enc_key);
    AES_ecb_encrypt((unsigned char*)textManip, (unsigned char*)enc_out, &enc_key, 1);  

    AES_set_decrypt_key((unsigned char*)p_key, 128, &dec_key);
    AES_decrypt((unsigned char*)enc_out, (unsigned char*)dec_out, &dec_key);

To copy to clipboard, switch view to plain text mode 

& to test it;

qDebug() << "Original: " << (char*)(text);
	enc_out[strlen(p_Text)] = '\0';
	qDebug() << "Encrypted: " <<(enc_out);
	dec_out[strlen(p_Text)] = '\0';
	qDebug() << "Decrypted: " << (dec_out);

qDebug() << "Original: " << (char*)(text);
	enc_out[strlen(p_Text)] = '\0';
	qDebug() << "Encrypted: " <<(enc_out);
	dec_out[strlen(p_Text)] = '\0';
	qDebug() << "Decrypted: " << (dec_out);

To copy to clipboard, switch view to plain text mode 

the output is;

Original: WirofonPC010101
Encrypted: ??c?'r???)?A?
Decrypted: WirofonPC010101

which seems ecryption is working. But I somehow thought that my encrypted characters are no good. I mean Shouldn't they like

"31298sdf788123" or "122dfsdrwer324" ??

Thanks..

[wysota]

You're dumping binary data as text (and it is not text) to the console.

[zgulser]

Ok,

QString enc_str = QString::fromUtf8(enc_out);

QString enc_str = QString::fromUtf8(enc_out);

To copy to clipboard, switch view to plain text mode 

should work then..

---

Added after 23 minutes:

Hi,

I couldn't figured out how to convert binary to txt.. Can you show me a way?

[wysota]

Ok,

QString enc_str = QString::fromUtf8(enc_out);

QString enc_str = QString::fromUtf8(enc_out);

To copy to clipboard, switch view to plain text mode 

should work then..

Not really.

You can try this:

qDebug() << QByteArray(enc_out, size);

qDebug() << QByteArray(enc_out, size);

To copy to clipboard, switch view to plain text mode 

but you need to know the size of enc_out content, strlen() will not work here in a general case as the data can contain \0 characters.

[zgulser]

Hi,

qDebug() <<"Output: " << QByteArray(encryptedData, strlen(encryptedData));

qDebug() <<"Output: " << QByteArray(encryptedData, strlen(encryptedData));

To copy to clipboard, switch view to plain text mode 

gave actually the same result that is;

Encrypted: ??c?'r???)?A?

replacing strlen with a custom one do not affect the result I guess?

[wysota]

Try:

qDebug() << "Output:" << QByteArray(encryptedData, ...).toHex();

qDebug() << "Output:" << QByteArray(encryptedData, ...).toHex();

To copy to clipboard, switch view to plain text mode 

but still you can't use strlen to find the size of data. You need to read that using OpenSSL functions.