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# gc_random.m4 serial 1
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# Copyright (C) 2004 Simon Josefsson
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# This file is free software, distributed under the terms of the GNU
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# General Public License. As a special exception to the GNU General
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# Public License, this file may be distributed as part of a program
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# that contains a configuration script generated by Autoconf, under
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# the same distribution terms as the rest of that program.
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AC_REQUIRE([AC_CANONICAL_TARGET])
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# Devices with randomness.
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# FIXME: Are these the best defaults?
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NAME_OF_RANDOM_DEVICE="/dev/srandom"
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NAME_OF_PSEUDO_RANDOM_DEVICE="/dev/prandom"
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NAME_OF_NONCE_DEVICE="/dev/urandom"
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NAME_OF_RANDOM_DEVICE="/dev/srandom"
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NAME_OF_PSEUDO_RANDOM_DEVICE="/dev/urandom"
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NAME_OF_NONCE_DEVICE="/dev/urandom"
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*-solaris* | *-irix* | *-dec-osf* )
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NAME_OF_RANDOM_DEVICE="/dev/random"
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NAME_OF_PSEUDO_RANDOM_DEVICE="/dev/random"
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NAME_OF_NONCE_DEVICE="/dev/random"
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NAME_OF_RANDOM_DEVICE="/dev/random"
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NAME_OF_PSEUDO_RANDOM_DEVICE="/dev/urandom"
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NAME_OF_NONCE_DEVICE="/dev/urandom"
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AC_MSG_CHECKING([device with (strong) random data...])
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AC_ARG_ENABLE(random-device,
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AC_HELP_STRING([--enable-random-device],
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[device with (strong) randomness (for Nettle)]),
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NAME_OF_RANDOM_DEVICE=$enableval)
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AC_MSG_RESULT($NAME_OF_RANDOM_DEVICE)
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AC_MSG_CHECKING([device with pseudo random data...])
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AC_ARG_ENABLE(pseudo-random-device,
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AC_HELP_STRING([--enable-pseudo-random-device],
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[device with pseudo randomness (for Nettle)]),
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NAME_OF_PSEUDO_RANDOM_DEVICE=$enableval)
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AC_MSG_RESULT($NAME_OF_PSEUDO_RANDOM_DEVICE)
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AC_MSG_CHECKING([device with unpredictable data for nonces...])
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AC_ARG_ENABLE(nonce-device,
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AC_HELP_STRING([--enable-nonce-device],
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[device with unpredictable nonces (for Nettle)]),
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NAME_OF_NONCE_DEVICE=$enableval)
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AC_MSG_RESULT($NAME_OF_NONCE_DEVICE)
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AC_CHECK_FILE($NAME_OF_RANDOM_DEVICE,, AC_MSG_ERROR([[
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*** Device for (strong) random data $NAME_OF_RANDOM_DEVICE does not exist
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AC_CHECK_FILE($NAME_OF_PSEUDO_RANDOM_DEVICE,, AC_MSG_ERROR([[
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*** Device for pseudo-random data $NAME_OF_PSEUDO_RANDOM_DEVICE does not exist
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AC_CHECK_FILE($NAME_OF_NONCE_DEVICE,, AC_MSG_ERROR([[
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*** Device for unpredictable nonces $NAME_OF_NONCE_DEVICE does not exist
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# FIXME: Open+read 42 bytes+close twice and compare data. Should differ.
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AC_DEFINE_UNQUOTED(NAME_OF_RANDOM_DEVICE, "$NAME_OF_RANDOM_DEVICE",
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[defined to the name of the (strong) random device])
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AC_DEFINE_UNQUOTED(NAME_OF_PSEUDO_RANDOM_DEVICE,
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"$NAME_OF_PSEUDO_RANDOM_DEVICE",
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[defined to the name of the pseudo random device])
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AC_DEFINE_UNQUOTED(NAME_OF_NONCE_DEVICE, "$NAME_OF_NONCE_DEVICE",
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[defined to the name of the unpredictable nonce device])