private void btnL2ToL1_Click(object sender, EventArgs e)
{
byte[] l2data = new byte[23];
if (textL2Data.Text.Length != 23 * 2 && textL2Data.Text.Length != 23 * 3 - 1)
{
MessageBox.Show(this, "Supply 23 bytes L2 data ...");
textL1burst0.Text = "";
textL1burst1.Text = "";
textL1burst2.Text = "";
textL1burst3.Text = "";
return;
}
ByteUtil.BytesFromString(textL2Data.Text, ref l2data);
bool[][] l1bursts = new bool[4][];
for (int i = 0; i < l1bursts.Length; i++)
{
l1bursts[i] = new bool[114];
}
SDCCHBurst sdcch = new SDCCHBurst();
sdcch.L2DataAdd(l2data);
sdcch.L2ToL1Convert();
sdcch.L1BurstIGet(ref l1bursts);
textL1burst0.Text = ByteUtil.BitsToString(l1bursts[0]);
textL1burst1.Text = ByteUtil.BitsToString(l1bursts[1]);
textL1burst2.Text = ByteUtil.BitsToString(l1bursts[2]);
textL1burst3.Text = ByteUtil.BitsToString(l1bursts[3]);
}
private void btnBoolGadConvert_Click(object sender, EventArgs e)
{
bool inputError = false;
bool dirBoolToGad = radioBoolToGad.Checked;
if (dirBoolToGad)
{
if (textBool0.Text.Length != 114 || textBool1.Text.Length != 114 ||
textBool2.Text.Length != 114 || textBool3.Text.Length != 114)
{
inputError = true;
}
MessageBox.Show("not supported yet!");
return;
}
else
{
byte[] byteBuf = new byte[19];
GSMParameters param = new GSMParameters();
SDCCHBurst sdcch = new SDCCHBurst();
ByteUtil.BytesFromString(textGad0.Text, ref byteBuf);
sdcch.ParseData(param, ByteUtil.BitsFromBytes(byteBuf), 0);
ByteUtil.BytesFromString(textGad1.Text, ref byteBuf);
sdcch.ParseData(param, ByteUtil.BitsFromBytes(byteBuf), 1);
ByteUtil.BytesFromString(textGad2.Text, ref byteBuf);
sdcch.ParseData(param, ByteUtil.BitsFromBytes(byteBuf), 2);
ByteUtil.BytesFromString(textGad3.Text, ref byteBuf);
sdcch.ParseData(param, ByteUtil.BitsFromBytes(byteBuf), 3);
bool[][] boolBuf = new bool[4][];
for (int i = 0; i < boolBuf.Length; i++)
{
boolBuf[i] = new bool[114];
}
sdcch.L1BurstEGet(ref boolBuf);
if (boolBuf == null)
{
MessageBox.Show("error reading bits");
return;
}
textBool0.Text = ByteUtil.BitsToString(boolBuf[0]);
textBool1.Text = ByteUtil.BitsToString(boolBuf[1]);
textBool2.Text = ByteUtil.BitsToString(boolBuf[2]);
textBool3.Text = ByteUtil.BitsToString(boolBuf[3]);
}
}
private void btnEncryptToL1_Click(object sender, EventArgs e)
{
bool error = false;
if (textL2Data.Text.Length != 23 * 2 && textL2Data.Text.Length != 23 * 3 - 1)
{
MessageBox.Show(this, "Supply 23 bytes L2 data ...");
error = true;
}
if (textKc.Text.Length != 8 * 2)
{
MessageBox.Show(this, "Supply 8 bytes Kc ...");
error = true;
}
if (textFN.Text.Length == 0)
{
MessageBox.Show(this, "Supply frame number ...");
error = true;
}
if (error)
{
textL1crypt0.Text = "";
textL1crypt1.Text = "";
textL1crypt2.Text = "";
textL1crypt3.Text = "";
return;
}
byte[] l2data = new byte[23];
ByteUtil.BytesFromString(textL2Data.Text, ref l2data);
bool[][] l1bursts = new bool[4][];
for (int i = 0; i < l1bursts.Length; i++)
{
l1bursts[i] = new bool[114];
}
SDCCHBurst sdcch = new SDCCHBurst();
sdcch.L2DataAdd(l2data);
sdcch.L2ToL1Convert();
sdcch.L1BurstIGet(ref l1bursts);
/* crypt it */
byte[] kc = new byte[8];
ByteUtil.BytesFromString(textKc.Text, ref kc);
GSMParameters param = new GSMParameters();
param.FN = uint.Parse(textFN.Text);
CryptA5 A5Algo = new CryptA5(kc);
if (radioSameFN.Checked)
{
A5Algo.CryptDownlink(l1bursts[0], param.Count);
A5Algo.CryptDownlink(l1bursts[1], param.Count);
A5Algo.CryptDownlink(l1bursts[2], param.Count);
A5Algo.CryptDownlink(l1bursts[3], param.Count);
}
else
{
A5Algo.CryptDownlink(l1bursts[0], param.Count);
param.FN++;
A5Algo.CryptDownlink(l1bursts[1], param.Count);
param.FN++;
A5Algo.CryptDownlink(l1bursts[2], param.Count);
param.FN++;
A5Algo.CryptDownlink(l1bursts[3], param.Count);
}
textL1crypt0.Text = ByteUtil.BitsToString(l1bursts[0]);
textL1crypt1.Text = ByteUtil.BitsToString(l1bursts[1]);
textL1crypt2.Text = ByteUtil.BitsToString(l1bursts[2]);
textL1crypt3.Text = ByteUtil.BitsToString(l1bursts[3]);
}