kc3-lang/gnulib/m4/gc-random.m4

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• Hash : a3fd683d
  Author :
  Date : 2017-01-01T02:59:23
  

  version-etc: new year
  
  * build-aux/gendocs.sh (version):
  * doc/gendocs_template:
  * doc/gendocs_template_min:
  * doc/gnulib.texi:
  * lib/version-etc.c (COPYRIGHT_YEAR):
  Update copyright dates by hand in templates and the like.
  * all files: Run 'make update-copyright'.
  

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• m4/gc-random.m4

• # gc-random.m4 serial 6
  dnl Copyright (C) 2005-2017 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])dnl
  
    case "$host_os" in
      *openbsd* | *mirbsd*)
        NAME_OF_RANDOM_DEVICE="/dev/srandom"
        NAME_OF_PSEUDO_RANDOM_DEVICE="/dev/prandom"
        NAME_OF_NONCE_DEVICE="/dev/urandom"
        ;;
  
      *netbsd*)
        NAME_OF_RANDOM_DEVICE="/dev/srandom"
        NAME_OF_PSEUDO_RANDOM_DEVICE="/dev/urandom"
        NAME_OF_NONCE_DEVICE="/dev/urandom"
        ;;
  
      *solaris* | *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])
  ])
  

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