2 dnl Copyright (C) 2005 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
9 AC_LIBSOURCES([gc.h, gc-gnulib.c, gc-libgcrypt.c])
10 AC_ARG_WITH(libgcrypt,
11 AS_HELP_STRING([--with-libgcrypt], [use libgcrypt for low-level crypto]),
12 libgcrypt=$withval, libgcrypt=no)
13 if test "$libgcrypt" != no; then
14 AC_LIB_HAVE_LINKFLAGS([gcrypt])
16 if test "$ac_cv_libgcrypt" = yes; then
17 AC_CHECK_HEADER(gcrypt.h)
18 AC_LIBOBJ([gc-libgcrypt])
20 AC_LIBOBJ([gc-gnulib])
22 # Devices with randomness.
23 # FIXME: Are these the best defaults?
27 NAME_OF_RANDOM_DEVICE="/dev/srandom"
28 NAME_OF_PSEUDO_RANDOM_DEVICE="/dev/prandom"
29 NAME_OF_NONCE_DEVICE="/dev/urandom"
33 NAME_OF_RANDOM_DEVICE="/dev/srandom"
34 NAME_OF_PSEUDO_RANDOM_DEVICE="/dev/urandom"
35 NAME_OF_NONCE_DEVICE="/dev/urandom"
38 *-solaris* | *-irix* | *-dec-osf* )
39 NAME_OF_RANDOM_DEVICE="/dev/random"
40 NAME_OF_PSEUDO_RANDOM_DEVICE="/dev/random"
41 NAME_OF_NONCE_DEVICE="/dev/random"
45 NAME_OF_RANDOM_DEVICE="/dev/random"
46 NAME_OF_PSEUDO_RANDOM_DEVICE="/dev/urandom"
47 NAME_OF_NONCE_DEVICE="/dev/urandom"
51 AC_MSG_CHECKING([device with (strong) random data...])
52 AC_ARG_ENABLE(random-device,
53 AC_HELP_STRING([--enable-random-device],
54 [device with (strong) randomness (for Nettle)]),
55 NAME_OF_RANDOM_DEVICE=$enableval)
56 AC_MSG_RESULT($NAME_OF_RANDOM_DEVICE)
58 AC_MSG_CHECKING([device with pseudo random data...])
59 AC_ARG_ENABLE(pseudo-random-device,
60 AC_HELP_STRING([--enable-pseudo-random-device],
61 [device with pseudo randomness (for Nettle)]),
62 NAME_OF_PSEUDO_RANDOM_DEVICE=$enableval)
63 AC_MSG_RESULT($NAME_OF_PSEUDO_RANDOM_DEVICE)
65 AC_MSG_CHECKING([device with unpredictable data for nonces...])
66 AC_ARG_ENABLE(nonce-device,
67 AC_HELP_STRING([--enable-nonce-device],
68 [device with unpredictable nonces (for Nettle)]),
69 NAME_OF_NONCE_DEVICE=$enableval)
70 AC_MSG_RESULT($NAME_OF_NONCE_DEVICE)
72 if test "$cross_compiling" != yes; then
73 AC_CHECK_FILE($NAME_OF_RANDOM_DEVICE,, AC_MSG_ERROR([[
74 *** Device for (strong) random data $NAME_OF_RANDOM_DEVICE does not exist
76 AC_CHECK_FILE($NAME_OF_PSEUDO_RANDOM_DEVICE,, AC_MSG_ERROR([[
77 *** Device for pseudo-random data $NAME_OF_PSEUDO_RANDOM_DEVICE does not exist
79 AC_CHECK_FILE($NAME_OF_NONCE_DEVICE,, AC_MSG_ERROR([[
80 *** Device for unpredictable nonces $NAME_OF_NONCE_DEVICE does not exist
83 AC_MSG_NOTICE([[Cross compiling, assuming random devices exists...]])
86 # FIXME: Open+read 42 bytes+close twice and compare data. Should differ.
88 AC_DEFINE_UNQUOTED(NAME_OF_RANDOM_DEVICE, "$NAME_OF_RANDOM_DEVICE",
89 [defined to the name of the (strong) random device])
90 AC_DEFINE_UNQUOTED(NAME_OF_PSEUDO_RANDOM_DEVICE,
91 "$NAME_OF_PSEUDO_RANDOM_DEVICE",
92 [defined to the name of the pseudo random device])
93 AC_DEFINE_UNQUOTED(NAME_OF_NONCE_DEVICE, "$NAME_OF_NONCE_DEVICE",
94 [defined to the name of the unpredictable nonce device])
98 # Prerequisites of lib/gc.h
99 AC_DEFUN([gl_PREREQ_GC], [:])