gc-random: Replace implementation with call to getrandom.

* lib/gc-gnulib.c [GNULIB_GC_RANDOM]: Replace #include's with
those needed for getrandom.
(gc_init): Remove old randomness code.
(gc_done): Likewise.
(randomize): Rewrite using getrandom, inspired by getentropy.
* m4/gc-random.m4: Remove file.
* modules/crypto/gc-random: Drop gc-random.m4, gl_GC_RANDOM, and
LIB_GC_RANDOM.  Add conditional dependency on getrandom.
* modules/crypto/gc-tests (test_gc_LDADD): Drop LIB_GC_RANDOM.

1 files changed, 0 insertions, 89 deletions

diff --git a/m4/gc-random.m4 b/m4/gc-random.m4
deleted file mode 100644
index d27031b27b..0000000000
--- a/m4/gc-random.m4
+++ /dev/null
@@ -1,89 +0,0 @@
-# gc-random.m4 serial 9
-dnl Copyright (C) 2005-2021 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-AC_DEFUN([gl_GC_RANDOM],
-[
-  # Devices with randomness.
-  # FIXME: Are these the best defaults?
-
-  AC_REQUIRE([AC_CANONICAL_HOST])
-
-  case "$host_os" in
-    *mirbsd*)
-      NAME_OF_RANDOM_DEVICE="/dev/srandom"
-      NAME_OF_PSEUDO_RANDOM_DEVICE="/dev/prandom"
-      NAME_OF_NONCE_DEVICE="/dev/urandom"
-      ;;
-
-    *irix* | *dec-osf* )
-      NAME_OF_RANDOM_DEVICE="/dev/random"
-      NAME_OF_PSEUDO_RANDOM_DEVICE="/dev/random"
-      NAME_OF_NONCE_DEVICE="/dev/random"
-      ;;
-
-    *)
-      NAME_OF_RANDOM_DEVICE="/dev/random"
-      NAME_OF_PSEUDO_RANDOM_DEVICE="/dev/urandom"
-      NAME_OF_NONCE_DEVICE="/dev/urandom"
-      ;;
-  esac
-
-  AC_MSG_CHECKING([device with (strong) random data...])
-  AC_ARG_ENABLE([random-device],
-        AS_HELP_STRING([--enable-random-device],
-                [device with (strong) randomness (for Nettle)]),
-        NAME_OF_RANDOM_DEVICE=$enableval)
-  AC_MSG_RESULT([$NAME_OF_RANDOM_DEVICE])
-
-  AC_MSG_CHECKING([device with pseudo random data...])
-  AC_ARG_ENABLE([pseudo-random-device],
-        AS_HELP_STRING([--enable-pseudo-random-device],
-                [device with pseudo randomness (for Nettle)]),
-        NAME_OF_PSEUDO_RANDOM_DEVICE=$enableval)
-  AC_MSG_RESULT([$NAME_OF_PSEUDO_RANDOM_DEVICE])
-
-  AC_MSG_CHECKING([device with unpredictable data for nonces...])
-  AC_ARG_ENABLE([nonce-device],
-        AS_HELP_STRING([--enable-nonce-device],
-                [device with unpredictable nonces (for Nettle)]),
-        NAME_OF_NONCE_DEVICE=$enableval)
-  AC_MSG_RESULT([$NAME_OF_NONCE_DEVICE])
-
-  if test "$cross_compiling" != yes; then
-    if test "$NAME_OF_RANDOM_DEVICE" != "no"; then
-      AC_CHECK_FILE([$NAME_OF_RANDOM_DEVICE],,
-        AC_MSG_WARN([[Device '$NAME_OF_RANDOM_DEVICE' does not exist, consider to use --enable-random-device]]))
-    fi
-    if test "$NAME_OF_PSEUDO_RANDOM_DEVICE" != "no"; then
-      AC_CHECK_FILE([$NAME_OF_PSEUDO_RANDOM_DEVICE],,
-        AC_MSG_WARN([[Device '$NAME_OF_PSEUDO_RANDOM_DEVICE' does not exist, consider to use --enable-pseudo-random-device]]))
-    fi
-    if test "$NAME_OF_NONCE_DEVICE" != "no"; then
-      AC_CHECK_FILE([$NAME_OF_NONCE_DEVICE],,
-        AC_MSG_WARN([[Device '$NAME_OF_NONCE_DEVICE' does not exist, consider to use --enable-nonce-device]]))
-    fi
-  else
-    AC_MSG_NOTICE([[Cross compiling, assuming random devices exists on the target host...]])
-  fi
-
-  # FIXME?: Open+read 42 bytes+close twice and compare data.  Should differ.
-
-  AC_DEFINE_UNQUOTED([NAME_OF_RANDOM_DEVICE], ["$NAME_OF_RANDOM_DEVICE"],
-                   [defined to the name of the (strong) random device])
-  AC_DEFINE_UNQUOTED([NAME_OF_PSEUDO_RANDOM_DEVICE],
-                         "$NAME_OF_PSEUDO_RANDOM_DEVICE",
-                   [defined to the name of the pseudo random device])
-  AC_DEFINE_UNQUOTED([NAME_OF_NONCE_DEVICE], ["$NAME_OF_NONCE_DEVICE"],
-                   [defined to the name of the unpredictable nonce device])
-
-  case $host_os in
-    mingw*)
-      LIB_GC_RANDOM='-ladvapi32' ;;
-    *)
-      LIB_GC_RANDOM= ;;
-  esac
-  AC_SUBST([LIB_GC_RANDOM])
-])