windows: Provide a getpass() implementation

diff --git a/src/libstrongswan/utils/windows.c b/src/libstrongswan/utils/windows.c
index 492821d..c0ae3d8 100644 (file)
--- a/src/libstrongswan/utils/windows.c
+++ b/src/libstrongswan/utils/windows.c
@@ -251,6 +251,65 @@ int socketpair(int domain, int type, int protocol, int sv[2])
 }
 
 /**
+ * See header
+ */
+char* getpass(const char *prompt)
+{
+       static char buf[64] = "";
+       char *pos;
+       HANDLE in, out;
+       DWORD mode, written = 0, total, done;
+
+       out = GetStdHandle(STD_OUTPUT_HANDLE);
+       in = GetStdHandle(STD_INPUT_HANDLE);
+
+       if (out == INVALID_HANDLE_VALUE || in == INVALID_HANDLE_VALUE ||
+               !GetConsoleMode(out, &mode) || !GetConsoleMode(in, &mode))
+       {
+               return NULL;
+       }
+
+       total = strlen(prompt);
+       while (written < total)
+       {
+               if (!WriteConsole(out, prompt + written, total - written, &done, NULL))
+               {
+                       return NULL;
+               }
+               written += done;
+       }
+
+       if (!SetConsoleMode(in, mode & ~ENABLE_ECHO_INPUT))
+       {
+               return NULL;
+       }
+
+       while (TRUE)
+       {
+               if (!ReadConsole(in, buf, sizeof(buf), &done, NULL))
+               {
+                       SetConsoleMode(in, mode);
+                       return NULL;
+               }
+               if (done)
+               {
+                       pos = strchr(buf, '\r');
+                       if (pos)
+                       {
+                               *pos = '\0';
+                       }
+                       break;
+               }
+       }
+       SetConsoleMode(in, mode);
+
+       /* append a newline, as we have no echo during input */
+       WriteConsole(out, "\r\n", 2, &done, NULL);
+
+       return buf;
+}
+
+/**
  * Set errno for a function setting WSA error on failure
  */
 static int wserr(int retval)

diff --git a/src/libstrongswan/utils/windows.h b/src/libstrongswan/utils/windows.h
index 235586c..c93f3fd 100644 (file)
--- a/src/libstrongswan/utils/windows.h
+++ b/src/libstrongswan/utils/windows.h
@@ -255,6 +255,12 @@ int dlclose(void *handle);
 int socketpair(int domain, int type, int protocol, int sv[2]);
 
 /**
+ * getpass(3) on Windows consoles
+ */
+char* getpass(const char *prompt);
+#define HAVE_GETPASS
+
+/**
  * Map MSG_DONTWAIT to the reserved, but deprecated MSG_INTERRUPT
  */
 #define MSG_DONTWAIT MSG_INTERRUPT