crypto/ui/ui_openssl.c: UTF-y Windows code path.

Windows never composes UTF-8 strings as result of user interaction
such as input query. The only way to compose one is programmatic
conversion from WCHAR string, which in turn can be picked up with
ReadConsoleW.

Reviewed-by: Richard Levitte <levitte@openssl.org>

diff --git a/crypto/ui/ui_openssl.c b/crypto/ui/ui_openssl.c
index 929f7cb4c7ebe0d883afca8844d2738c1425f26e..7d1e389de044234cfeaeb790324c23ad559ede33 100644 (file)
--- a/crypto/ui/ui_openssl.c
+++ b/crypto/ui/ui_openssl.c
@@ -68,8 +68,8 @@
 #endif
 
 /*
- * There are 5 types of terminal interface supported, TERMIO, TERMIOS, VMS,
- * MSDOS and SGTTY.
+ * There are 6 types of terminal interface supported, TERMIO, TERMIOS, VMS,
+ * MSDOS, WIN32 Console and SGTTY.
  *
  * If someone defines one of the macros TERMIO, TERMIOS or SGTTY, it will
  * remain respected.  Otherwise, we default to TERMIOS except for a few
@@ -87,11 +87,9 @@
 #  undef  SGTTY
 /*
  * We know that VMS, MSDOS, VXWORKS, use entirely other mechanisms.
- * MAC_OS_GUSI_SOURCE should probably go away, but that needs to be confirmed.
  */
 # elif !defined(OPENSSL_SYS_VMS) \
        && !defined(OPENSSL_SYS_MSDOS) \
-       && !defined(MAC_OS_GUSI_SOURCE) \
        && !defined(OPENSSL_SYS_VXWORKS)
 #  define TERMIOS
 #  undef  TERMIO
@@ -144,15 +142,6 @@ struct IOSB {
 };
 #endif
 
-#if defined(MAC_OS_GUSI_SOURCE)
-/*
- * This one needs work. As a matter of fact the code is unoperational
- * and this is only a trick to get it compiled.
- *                                      <appro@fy.chalmers.se>
- */
-# define TTY_STRUCT int
-#endif
-
 #ifndef NX509_SIG
 # define NX509_SIG 32
 #endif
@@ -172,6 +161,8 @@ static long tty_orig[3], tty_new[3]; /* XXX Is there any guarantee that this
                                       * structures? */
 static long status;
 static unsigned short channel = 0;
+#elif defined(_WIN32) && !defined(_WIN32_WCE)
+static DWORD tty_orig, tty_new;
 #else
 # if !defined(OPENSSL_SYS_MSDOS) || defined(__DJGPP__)
 static TTY_STRUCT tty_orig, tty_new;
@@ -187,7 +178,7 @@ static void recsig(int);
 static void pushsig(void);
 static void popsig(void);
 #endif
-#if defined(OPENSSL_SYS_MSDOS)
+#if defined(OPENSSL_SYS_MSDOS) && !defined(_WIN32)
 static int noecho_fgets(char *buf, int size, FILE *tty);
 #endif
 static int read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl);
@@ -295,7 +286,8 @@ static int read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl)
     char result[BUFSIZ];
     int maxsize = BUFSIZ - 1;
 #if !defined(OPENSSL_SYS_WINCE)
-    char *p;
+    char *p = NULL;
+    int echo_eol = !echo;
 
     intr_signal = 0;
     ok = 0;
@@ -309,15 +301,48 @@ static int read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl)
     ps = 2;
 
     result[0] = '\0';
-# ifdef OPENSSL_SYS_MSDOS
+# if defined(_WIN32)
+    if (is_a_tty) {
+        DWORD numread;
+#  if defined(CP_UTF8)
+        WCHAR wresult[BUFSIZ];
+
+        if (ReadConsoleW(GetStdHandle(STD_INPUT_HANDLE),
+                         wresult, maxsize, &numread, NULL)) {
+            if (numread >= 2 &&
+                wresult[numread-2] == L'\r' && wresult[numread-1] == L'\n') {
+                wresult[numread-2] = L'\n';
+                numread--;
+                echo_eol = 0;
+            }
+            wresult[numread] = '\0';
+            if (WideCharToMultiByte(CP_UTF8, 0, wresult, -1,
+                                    result, sizeof(result), NULL, 0) > 0)
+                p = result;
+
+            OPENSSL_cleanse(wresult, sizeof(wresult));
+        }
+#  else
+        if (ReadConsoleA(GetStdHandle(STD_INPUT_HANDLE),
+                         result, maxsize, &numread, NULL)) {
+            if (numread >= 2 &&
+                result[numread-2] == '\r' && result[numread-1] == '\n') {
+                result[numread-2] = '\n';
+                numread--;
+                echo_eol = 0;
+            }
+            result[numread] = '\0';
+            p = result;
+        }
+#  endif
+    } else
+# elif defined(OPENSSL_SYS_MSDOS)
     if (!echo) {
         noecho_fgets(result, maxsize, tty_in);
         p = result;             /* FIXME: noecho_fgets doesn't return errors */
     } else
-        p = fgets(result, maxsize, tty_in);
-# else
-    p = fgets(result, maxsize, tty_in);
 # endif
+    p = fgets(result, maxsize, tty_in);
     if (!p)
         goto error;
     if (feof(tty_in))
@@ -335,7 +360,7 @@ static int read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl)
  error:
     if (intr_signal == SIGINT)
         ok = -1;
-    if (!echo)
+    if (echo_eol)
         fprintf(tty_out, "\n");
     if (ps >= 2 && !echo && !echo_console(ui))
         ok = 0;
@@ -359,6 +384,17 @@ static int open_console(UI *ui)
 #if defined(OPENSSL_SYS_VXWORKS)
     tty_in = stdin;
     tty_out = stderr;
+#elif defined(_WIN32) && !defined(_WIN32_WCE)
+    if ((tty_out = fopen("conout$", "w")) == NULL)
+        tty_out = stderr;
+
+    if (GetConsoleMode(GetStdHandle(STD_INPUT_HANDLE), &tty_orig)) {
+        tty_in = stdin;
+    } else {
+        is_a_tty = 0;
+        if ((tty_in = fopen("conin$", "r")) == NULL)
+            tty_in = stdin;
+    }
 #else
 # ifdef OPENSSL_SYS_MSDOS
 #  define DEV_TTY "con"
@@ -423,6 +459,13 @@ static int noecho_console(UI *ui)
                  0);
     if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
         return 0;
+#endif
+#if defined(_WIN32) && !defined(_WIN32_WCE)
+    if (is_a_tty) {
+        tty_new = tty_orig;
+        tty_new &= ~ENABLE_ECHO_INPUT;
+        SetConsoleMode(GetStdHandle(STD_INPUT_HANDLE), tty_new);
+    }
 #endif
     return 1;
 }
@@ -447,6 +490,13 @@ static int echo_console(UI *ui)
                  0);
     if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
         return 0;
+#endif
+#if defined(_WIN32) && !defined(_WIN32_WCE)
+    if (is_a_tty) {
+        tty_new = tty_orig;
+        tty_new |= ENABLE_ECHO_INPUT;
+        SetConsoleMode(GetStdHandle(STD_INPUT_HANDLE), tty_new);
+    }
 #endif
     return 1;
 }
@@ -549,7 +599,7 @@ static void recsig(int i)
 #endif
 
 /* Internal functions specific for Windows */
-#if defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_WINCE)
+#if defined(OPENSSL_SYS_MSDOS) && !defined(_WIN32)
 static int noecho_fgets(char *buf, int size, FILE *tty)
 {
     int i;