* Makefile.in: Add dependencies for fhandler_random.o

* fhandler.h: Add device type FH_RANDOM. Add class
        fhandler_dev_random.
        * fhandler_random.cc: New file. Implementation of
        fhandler_dev_random.
        * hinfo.cc (build_fhandler): Add case for FH_RANDOM.
        * path.cc: Add device names for random devices to
        windows_device_names.
        (get_device_number): Add if branch for random devices.
        (win32_device_name): Add device name generation for
        random devices.
        winsup.h: Include <wincrypt.h>.

winsup/cygwin/ChangeLog

@@ -1,3 +1,18 @@
+Wed May  3 17:28:00 2000  Corinna Vinschen <corinna@vinschen.de>
+
+        * Makefile.in: Add dependencies for fhandler_random.o
+        * fhandler.h: Add device type FH_RANDOM. Add class
+        fhandler_dev_random.
+        * fhandler_random.cc: New file. Implementation of
+        fhandler_dev_random.
+        * hinfo.cc (build_fhandler): Add case for FH_RANDOM.
+        * path.cc: Add device names for random devices to
+        windows_device_names.
+        (get_device_number): Add if branch for random devices.
+        (win32_device_name): Add device name generation for
+        random devices.
+        winsup.h: Include <wincrypt.h>.
+
 2000-05-02  Kazuhiro Fujieda  <fujieda@jaist.ac.jp>
 
 	* path.cc (mount_info::conv_to_win32_path): Previous patch 

winsup/cygwin/Makefile.in

@@ -119,7 +119,8 @@ DLL_IMPORTS:=$(w32api_lib)/libkernel32.a $(w32api_lib)/libadvapi32.a
 DLL_OFILES:=assert.o dcrt0.o debug.o delqueue.o dir.o dlfcn.o dll_init.o \
 	environ.o  errno.o exceptions.o exec.o external.o fcntl.o fhandler.o \
 	fhandler_console.o fhandler_serial.o fhandler_termios.o fhandler_tty.o \
-	fhandler_windows.o fhandler_raw.o fhandler_floppy.o fhandler_tape.o fhandler_zero.o \
+	fhandler_windows.o fhandler_raw.o fhandler_floppy.o fhandler_tape.o \
+        fhandler_zero.o fhandler_random.o \
 	fork.o glob.o grp.o heap.o hinfo.o init.o ioctl.o localtime.o malloc.o \
 	mmap.o net.o ntea.o passwd.o path.o pinfo.o pipe.o regexp.o regerror.o \
 	regsub.o registry.o resource.o scandir.o security.o select.o shared.o \
@@ -292,6 +293,7 @@ fhandler_raw.o: $(WINSUP_H)
 fhandler_floppy.o: $(WINSUP_H)
 fhandler_tape.o: $(WINSUP_H)
 fhandler_zero.o: $(WINSUP_H)
+fhandler_random.o: $(WINSUP_H)
 fork.o: $(WINSUP_H) dll_init.h
 glob.o: include/glob.h
 gmon.o: profil.h gmon.h

winsup/cygwin/dtable.cc

@@ -282,6 +282,9 @@ hinfo::build_fhandler (int fd, DWORD dev, const char *name, int unit)
       case FH_ZERO:
 	fh = new (buf) fhandler_dev_zero (name);
 	break;
+      case FH_RANDOM:
+	fh = new (buf) fhandler_dev_random (name, unit);
+	break;
       default:
 	/* FIXME - this could recurse forever */
 	return build_fhandler (fd, name, NULL);

winsup/cygwin/fhandler.h

@@ -91,8 +91,9 @@ enum
   FH_TAPE    = 0x00000012,	/* is a tape */
   FH_NULL    = 0x00000013,	/* is the null device */
   FH_ZERO    = 0x00000014,	/* is the zero device */
+  FH_RANDOM  = 0x00000015,	/* is a random device */
 
-  FH_NDEV    = 0x00000015,	/* Maximum number of devices */
+  FH_NDEV    = 0x00000016,	/* Maximum number of devices */
   FH_DEVMASK = 0x00000fff,	/* devices live here */
   FH_BAD     = 0xffffffff
 };
@@ -732,6 +733,24 @@ public:
   void dump ();
 };
 
+class fhandler_dev_random: public fhandler_base
+{
+protected:
+  int unit;
+  HCRYPTPROV crypt_prov;
+public:
+  fhandler_dev_random (const char *name, int unit);
+  int get_unit () { return unit; }
+  int open (const char *path, int flags, mode_t mode = 0);
+  int write (const void *ptr, size_t len);
+  int read (void *ptr, size_t len);
+  off_t lseek (off_t offset, int whence);
+  int close (void);
+  int dup (fhandler_base *child);
+
+  void dump ();
+};
+
 class fhandler_windows: public fhandler_base
 {
 private:

winsup/cygwin/fhandler_random.cc

@@ -0,0 +1,92 @@
+/* fhandler_dev_random.cc: code to access /dev/random
+
+   Copyright 2000 Cygnus Solutions.
+
+   Written by Corinna Vinschen (vinschen@cygnus.com)
+
+This file is part of Cygwin.
+
+This software is a copyrighted work licensed under the terms of the
+Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
+details. */
+
+#include <errno.h>
+#include "winsup.h"
+
+#define RANDOM   8
+#define URANDOM  9
+
+fhandler_dev_random::fhandler_dev_random (const char *name, int nunit)
+  : fhandler_base (FH_RANDOM, name),
+    unit(nunit),
+    crypt_prov((HCRYPTPROV)NULL)
+{
+  set_cb (sizeof *this);
+}
+
+int
+fhandler_dev_random::open (const char *, int flags, mode_t)
+{
+  set_flags (flags);
+  return 1;
+}
+
+int
+fhandler_dev_random::write (const void *, size_t len)
+{
+  return len;
+}
+
+int
+fhandler_dev_random::read (void *ptr, size_t len)
+{
+  if (!len)
+    return 0;
+  if (!crypt_prov
+      && !CryptAcquireContext (&crypt_prov, NULL, MS_DEF_PROV,
+                            PROV_RSA_FULL, 0)
+      && !CryptAcquireContext (&crypt_prov, NULL, MS_DEF_PROV,
+                               PROV_RSA_FULL, CRYPT_NEWKEYSET))
+    {
+      __seterrno ();
+      return -1;
+    }
+  if (!CryptGenRandom (crypt_prov, len, (BYTE *)ptr))
+    {
+      __seterrno ();
+      return -1;
+    }
+  return len;
+}
+
+off_t
+fhandler_dev_random::lseek (off_t, int)
+{
+  return 0;
+}
+
+int
+fhandler_dev_random::close (void)
+{
+  if (crypt_prov)
+    while (!CryptReleaseContext (crypt_prov, 0)
+           && GetLastError () == ERROR_BUSY)
+      Sleep(10);
+  return 0;
+}
+
+int
+fhandler_dev_random::dup (fhandler_base *child)
+{
+  fhandler_dev_random *fhr = (fhandler_dev_random *) child;
+  fhr->unit = unit;
+  fhr->crypt_prov = (HCRYPTPROV)NULL;
+  return 0;
+}
+
+void
+fhandler_dev_random::dump ()
+{
+  paranoid_printf("here, fhandler_dev_random");
+}
+

winsup/cygwin/path.cc

@@ -436,6 +436,7 @@ const char *windows_device_names[] =
   "\\dev\\st%d",
   "nul",
   "\\dev\\zero",
+  "\\dev\\%srandom",
 };
 
 static int
@@ -500,6 +501,11 @@ get_device_number (const char *name, int &unit, BOOL from_conv)
 	devn = FH_NULL;
       else if (deveq ("zero"))
 	devn = FH_ZERO;
+      else if (deveq ("random") || deveq ("urandom"))
+        {
+	  devn = FH_RANDOM;
+          unit = 8 + (deveqn ("u", 1) ? 1 : 0); /* Keep unit Linux conformant */
+        }
       else if (deveqn ("com", 3) && (unit = digits (name + 3)) >= 0)
 	devn = FH_SERIAL;
       else if (deveq ("pipe") || deveq ("piper") || deveq ("pipew"))
@@ -535,7 +541,10 @@ win32_device_name (const char *src_path, char *win32_path,
 
   if ((devfmt = windows_device_names[FHDEVN (devn)]) == NULL)
     return FALSE;
-  __small_sprintf (win32_path, devfmt, unit);
+  if (devn == FH_RANDOM)
+    __small_sprintf (win32_path, devfmt, unit == 8 ? "" : "u");
+  else
+    __small_sprintf (win32_path, devfmt, unit);
   return TRUE;
 }
 

winsup/cygwin/winsup.h

@@ -51,6 +51,7 @@ return __res;
 }
 
 #include <windows.h>
+#include <wincrypt.h>
 
 /* Used for runtime OS check/decisions. */
 enum os_type {winNT = 1, win95, win98, win32s, unknown};