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import os
def parse_version(v):
return tuple(map(int, (v.split("."))))
gnutls_min_required_version = "3.6.13"
conf.CHECK_FUNCS('getrandom', headers='sys/random.h')
if not conf.CONFIG_SET('HAVE_GETRANDOM'):
gnutls_min_required_version = "3.7.2"
gnutls_required_version = gnutls_min_required_version
conf.CHECK_CFG(package='gnutls',
args=('"gnutls >= %s" --cflags --libs' % gnutls_required_version),
msg='Checking for GnuTLS >= %s' % gnutls_required_version,
mandatory=True)
gnutls_version_str = conf.cmd_and_log(conf.env.PKGCONFIG + ['--modversion', 'gnutls']).strip()
gnutls_version = parse_version(gnutls_version_str)
# Define gnutls as a system library
conf.SET_TARGET_TYPE('gnutls', 'SYSLIB')
# Check for gnutls_aead_cipher_encryptv2
#
# This is available since version 3.6.10, but 3.6.10 has a bug which got fixed
# in 3.6.11, see:
#
# https://gitlab.com/gnutls/gnutls/-/merge_requests/1085
#
# 3.6.10 - 3.6.14 have a severe memory leak with AES-CCM
# https://gitlab.com/gnutls/gnutls/-/merge_requests/1278
if (gnutls_version > parse_version('3.6.14')):
conf.DEFINE('ALLOW_GNUTLS_AEAD_CIPHER_ENCRYPTV2_AES_CCM', 1)
# Check if gnutls has fips mode support
# gnutls_fips140_mode_enabled() is available since 3.3.0
fragment = '''
#include <gnutls/gnutls.h>
#include <stdlib.h>
int main(void)
{
unsigned int ok;
ok = gnutls_fips140_mode_enabled();
return !ok;
}
'''
os.environ['GNUTLS_FORCE_FIPS_MODE'] = '1'
conf.CHECK_CODE(fragment,
'HAVE_GNUTLS_FIPS_MODE_SUPPORTED',
execute=True,
addmain=False,
add_headers=False,
lib='gnutls',
msg='Checking for gnutls fips mode support')
del os.environ['GNUTLS_FORCE_FIPS_MODE']
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