diff options
| author | Mounir IDRASSI <mounir.idrassi@idrix.fr> | 2013-06-22 16:16:13 +0200 |
|---|---|---|
| committer | Mounir IDRASSI <mounir.idrassi@idrix.fr> | 2014-11-08 23:18:07 +0100 |
| commit | c606f0866c3a2a5db3ef9bc41738ef33eb9612a9 (patch) | |
| tree | 5847c644cdfff3c1dd55b88b565448087ae89f11 /src/Boot/Windows/BootConsoleIo.cpp | |
| download | VeraCrypt-c606f0866c3a2a5db3ef9bc41738ef33eb9612a9.tar.gz VeraCrypt-c606f0866c3a2a5db3ef9bc41738ef33eb9612a9.zip | |
Add original TrueCrypt 7.1a sources
Diffstat (limited to 'src/Boot/Windows/BootConsoleIo.cpp')
| -rw-r--r-- | src/Boot/Windows/BootConsoleIo.cpp | 330 |
1 files changed, 330 insertions, 0 deletions
diff --git a/src/Boot/Windows/BootConsoleIo.cpp b/src/Boot/Windows/BootConsoleIo.cpp new file mode 100644 index 00000000..6558018f --- /dev/null +++ b/src/Boot/Windows/BootConsoleIo.cpp @@ -0,0 +1,330 @@ +/*
+ Copyright (c) 2008-2009 TrueCrypt Developers Association. All rights reserved.
+
+ Governed by the TrueCrypt License 3.0 the full text of which is contained in
+ the file License.txt included in TrueCrypt binary and source code distribution
+ packages.
+*/
+
+#include "Platform.h"
+#include "Bios.h"
+#include "BootConsoleIo.h"
+#include "BootDebug.h"
+#include "BootStrings.h"
+
+
+static int ScreenOutputDisabled = 0;
+
+void DisableScreenOutput ()
+{
+ ++ScreenOutputDisabled;
+}
+
+
+void EnableScreenOutput ()
+{
+ --ScreenOutputDisabled;
+}
+
+
+void PrintChar (char c)
+{
+#ifdef TC_BOOT_TRACING_ENABLED
+ WriteDebugPort (c);
+#endif
+
+ if (ScreenOutputDisabled)
+ return;
+
+ __asm
+ {
+ mov bx, 7
+ mov al, c
+ mov ah, 0xe
+ int 0x10
+ }
+}
+
+
+void PrintCharAtCursor (char c)
+{
+ if (ScreenOutputDisabled)
+ return;
+
+ __asm
+ {
+ mov bx, 7
+ mov al, c
+ mov cx, 1
+ mov ah, 0xa
+ int 0x10
+ }
+}
+
+
+void Print (const char *str)
+{
+ char c;
+ while (c = *str++)
+ PrintChar (c);
+}
+
+
+void Print (uint32 number)
+{
+ char str[12];
+ int pos = 0;
+ while (number >= 10)
+ {
+ str[pos++] = (char) (number % 10) + '0';
+ number /= 10;
+ }
+ str[pos] = (char) (number % 10) + '0';
+
+ while (pos >= 0)
+ PrintChar (str[pos--]);
+}
+
+
+void Print (const uint64 &number)
+{
+ if (number.HighPart == 0)
+ Print (number.LowPart);
+ else
+ PrintHex (number);
+}
+
+
+void PrintHex (byte b)
+{
+ PrintChar (((b >> 4) >= 0xA ? 'A' - 0xA : '0') + (b >> 4));
+ PrintChar (((b & 0xF) >= 0xA ? 'A' - 0xA : '0') + (b & 0xF));
+}
+
+
+void PrintHex (uint16 data)
+{
+ PrintHex (byte (data >> 8));
+ PrintHex (byte (data));
+}
+
+
+void PrintHex (uint32 data)
+{
+ PrintHex (uint16 (data >> 16));
+ PrintHex (uint16 (data));
+}
+
+
+void PrintHex (const uint64 &data)
+{
+ PrintHex (data.HighPart);
+ PrintHex (data.LowPart);
+}
+
+void PrintRepeatedChar (char c, int n)
+{
+ while (n-- > 0)
+ PrintChar (c);
+}
+
+
+void PrintEndl ()
+{
+ Print ("\r\n");
+}
+
+
+void PrintEndl (int cnt)
+{
+ while (cnt-- > 0)
+ PrintEndl ();
+}
+
+
+void Beep ()
+{
+ PrintChar (7);
+}
+
+
+void InitVideoMode ()
+{
+ if (ScreenOutputDisabled)
+ return;
+
+ __asm
+ {
+ // Text mode 80x25
+ mov ax, 3
+ int 0x10
+
+ // Page 0
+ mov ax, 0x500
+ int 0x10
+ }
+}
+
+
+void ClearScreen ()
+{
+ if (ScreenOutputDisabled)
+ return;
+
+ __asm
+ {
+ // White text on black
+ mov bh, 7
+ xor cx, cx
+ mov dx, 0x184f
+ mov ax, 0x600
+ int 0x10
+
+ // Cursor at 0,0
+ xor bh, bh
+ xor dx, dx
+ mov ah, 2
+ int 0x10
+ }
+}
+
+
+void PrintBackspace ()
+{
+ PrintChar (TC_BIOS_CHAR_BACKSPACE);
+ PrintCharAtCursor (' ');
+}
+
+
+void PrintError (const char *message)
+{
+ Print (TC_BOOT_STR_ERROR);
+ Print (message);
+ PrintEndl();
+ Beep();
+}
+
+
+void PrintErrorNoEndl (const char *message)
+{
+ Print (TC_BOOT_STR_ERROR);
+ Print (message);
+ Beep();
+}
+
+
+byte GetShiftFlags ()
+{
+ byte flags;
+ __asm
+ {
+ mov ah, 2
+ int 0x16
+ mov flags, al
+ }
+
+ return flags;
+}
+
+
+byte GetKeyboardChar ()
+{
+ return GetKeyboardChar (nullptr);
+}
+
+
+byte GetKeyboardChar (byte *scanCode)
+{
+ // Work around potential BIOS bugs (Windows boot manager polls the keystroke buffer)
+ while (!IsKeyboardCharAvailable());
+
+ byte asciiCode;
+ byte scan;
+ __asm
+ {
+ mov ah, 0
+ int 0x16
+ mov asciiCode, al
+ mov scan, ah
+ }
+
+ if (scanCode)
+ *scanCode = scan;
+
+ return asciiCode;
+}
+
+
+bool IsKeyboardCharAvailable ()
+{
+ bool available = false;
+ __asm
+ {
+ mov ah, 1
+ int 0x16
+ jz not_avail
+ mov available, true
+ not_avail:
+ }
+
+ return available;
+}
+
+
+bool EscKeyPressed ()
+{
+ if (IsKeyboardCharAvailable ())
+ {
+ byte keyScanCode;
+ GetKeyboardChar (&keyScanCode);
+ return keyScanCode == TC_BIOS_KEY_ESC;
+ }
+
+ return false;
+}
+
+
+void ClearBiosKeystrokeBuffer ()
+{
+ __asm
+ {
+ push es
+ xor ax, ax
+ mov es, ax
+ mov di, 0x41e
+ mov cx, 32
+ cld
+ rep stosb
+ pop es
+ }
+}
+
+
+bool IsPrintable (char c)
+{
+ return c >= ' ' && c <= '~';
+}
+
+
+int GetString (char *buffer, size_t bufferSize)
+{
+ byte c;
+ byte scanCode;
+ size_t pos = 0;
+
+ while (pos < bufferSize)
+ {
+ c = GetKeyboardChar (&scanCode);
+
+ if (scanCode == TC_BIOS_KEY_ENTER)
+ break;
+
+ if (scanCode == TC_BIOS_KEY_ESC)
+ return 0;
+
+ buffer[pos++] = c;
+ PrintChar (IsPrintable (c) ? c : ' ');
+ }
+
+ return pos;
+}
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