wanderer/ KRY-0x01-ng
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feat: decryption functional 

* still kind of WIP (a couple more things to check)
* added check if cryptmessage length mod 2 == 0
This commit is contained in:
citizen-VM 2020-08-24 05:47:29 +02:00
parent 33e268d7dc
commit f89eec7b96
Signed by: wanderer
GPG Key ID: 6391444A736EEE7E
1 changed files with 41 additions and 0 deletions
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41
main_form.cs
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@ -182,6 +182,11 @@ namespace KRY_0x01_ng
MessageBox.Show("Only alphabetic characters (with the exception of W) are allowed.\nCheck the cryptmessage for numbers, symbols or tab whitespace and remove them before continuing.", "Error");
return;
}
if (tb_m.Text.Length % 2 != 0)
{
MessageBox.Show("This pretty sure can't be a message I can deal with (uneven number of characters).", "Error");
return;
}
textBox9.Text = msg;
return;
}
@ -291,7 +296,43 @@ namespace KRY_0x01_ng
{
return;
}
fill_array_table();
check_cryptmessage(textBox9);
string message = "";
string crm = textBox9.Text;
int arrtb_gl = arrayTable.GetLength(0);
for (int i = 0; i < crm.Length; i+=2)
{
char ch1 = crm[i];
char ch2 = crm[i + 1];
char ech1;
char ech2;
int[] ch1xy = gimme_char_indices(ch1);
int[] ch2xy = gimme_char_indices(ch2);
if (ch1xy[0] == ch2xy[0])
{
/* c# neg modulo issue hack */
ech1 = arrayTable[ch1xy[0], (ch1xy[1] + 4) % arrtb_gl];
ech2 = arrayTable[ch2xy[0], (ch2xy[1] + 4) % arrtb_gl];
}
else if (ch1xy[1] == ch2xy[1])
{
ech1 = arrayTable[(ch1xy[0] + 4) % arrtb_gl, ch1xy[1]];
ech2 = arrayTable[(ch2xy[0] + 4) % arrtb_gl, ch2xy[1]];
}
else
{
ech1 = arrayTable[ch1xy[0], ch2xy[1]];
ech2 = arrayTable[ch2xy[0], ch1xy[1]];
}
string resulting_digraph = ech1.ToString() + ech2.ToString();
message += resulting_digraph;
}
textBox12.Text = message;
return;
}