QByteArray ImapPrivate::hmacMd5 (const QString& username,
const QString& password,
const QString& serverResponse)
{
QByteArray passwordBytes = password.toLatin1();
QByteArray ipad(64, 0);
QByteArray opad(64, 0);
for (int i = 0; i < 64; ++i) {
if (i < passwordBytes.size()) {
ipad[i] = (quint8)(0x36 ^ passwordBytes[i]);
opad[i] = (quint8)(0x5c ^ passwordBytes[i]);
} else {
ipad[i] = 0x36;
opad[i] = 0x5c;
}
}
QByteArray serverResponseBytes = serverResponse.toLatin1();
while (serverResponseBytes[0] == '+' || serverResponseBytes[0] == ' ')
serverResponseBytes.remove(0, 1);
QCryptographicHash md5hash(QCryptographicHash::Md5);
md5hash.addData(ipad);
md5hash.addData(serverResponseBytes);
QByteArray resultIpad = md5hash.result();
md5hash.reset();
md5hash.addData(opad);
md5hash.addData(resultIpad);
QByteArray resultOpad = md5hash.result();
QByteArray response = username.toLatin1() + ' ' + resultOpad.toHex();
return(response.toBase64());
}
void CAuthenticationHmac::ConstructL(const TLibraryPtr &aLib, TUint anIndex, const TDesC8 &aKey, TInt aBits)
{
/**
* Setup HMAC processing using the specified digest.
*
* @param aLib The library to use for the digest engine
* @param anIndex The digest algorithm number in library
* @param aKey The authentication key
* @param aBits The number of bits used from the digets.
*/
iDigest = aLib.iLibrary->MessageDigest(anIndex);
iBlockSize = aLib.iAlgs[anIndex].iBlock;
iDigestSize = aLib.iAlgs[anIndex].iVector;
iBits = aBits;
iHmac_ipad = HBufC8::NewMaxL(iBlockSize);
iHmac_opad = HBufC8::NewMaxL(iBlockSize);
iTemp = HBufC8::NewMaxL(iDigestSize);
TPtr8 ipad(iHmac_ipad->Des());
TPtr8 opad(iHmac_opad->Des());
if (aKey.Length() > iBlockSize)
{
iDigest->Init();
iDigest->Update(aKey);
iDigest->Final(ipad);
ipad.SetLength(iDigestSize);
}
else
ipad = aKey;
opad.SetLength(iBlockSize);
int i;
for (i = 0; i < ipad.Length(); ++i)
{
opad[i] = (TUint8)(ipad[i] ^ 0x5c);
ipad[i] ^= 0x36;
}
ipad.SetLength(iBlockSize);
for ( ;i < iBlockSize; ++i)
{
ipad[i] = 0x36;
opad[i] = 0x5c;
}
}
