Implement readpassphrase function, which read a passphrase from console, on Windows.

1 files changed, 36 insertions, 5 deletions

diff --git a/libarchive_fe/passphrase.c b/libarchive_fe/passphrase.c
index 0fe630e7..f6f76278 100644
--- a/libarchive_fe/passphrase.c
+++ b/libarchive_fe/passphrase.c
@@ -76,16 +76,47 @@ __FBSDID("$FreeBSD$");
 
 
 #if defined(_WIN32) && !defined(__CYGWIN__)
+#include <Windows.h>
 
 static char *
 readpassphrase(const char *prompt, char *buf, size_t bufsiz, int flags)
 {
-	(void)prompt;
-	(void)buf;
-	(void)bufsiz;
+	HANDLE hStdin, hStdout;
+	DWORD mode, rbytes;
+	BOOL success;
+
 	(void)flags;
-	errno = EINVAL;
-	return (NULL);
+
+	hStdin = GetStdHandle(STD_INPUT_HANDLE);
+	if (hStdin == INVALID_HANDLE_VALUE)
+		return (NULL);
+	hStdout = GetStdHandle(STD_OUTPUT_HANDLE);
+	if (hStdout == INVALID_HANDLE_VALUE)
+		return (NULL);
+
+	success = GetConsoleMode(hStdin, &mode);
+	if (!success)
+		return (NULL);
+	mode &= ~ENABLE_ECHO_INPUT;
+	mode |= ENABLE_LINE_INPUT | ENABLE_PROCESSED_INPUT;
+	success = SetConsoleMode(hStdin, mode);
+	if (!success)
+		return (NULL);
+
+	success = WriteFile(hStdout, prompt, (DWORD)strlen(prompt),
+		NULL, NULL);
+	if (!success)
+		return (NULL);
+	success = ReadFile(hStdin, buf, (DWORD)bufsiz - 1, &rbytes, NULL);
+	if (!success)
+		return (NULL);
+	WriteFile(hStdout, "\r\n", 2, NULL, NULL);
+	buf[rbytes] = '\0';
+	/* Remove trailing carriage return(s). */
+	if (rbytes > 2 && buf[rbytes - 2] == '\r' && buf[rbytes - 1] == '\n')
+		buf[rbytes - 2] = '\0';
+
+	return (buf);
 }
 
 #else /* _WIN32 && !__CYGWIN__ */