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Issue #25003: On Solaris 11.3 or newer, os.urandom() now uses the getrandom()

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function instead of the getentropy() function. The getentropy() function is
blocking to generate very good quality entropy, os.urandom() doesn't need such
high-quality entropy.
This commit is contained in:
Victor Stinner 2015-09-18 15:38:37 +02:00
parent 258f17c96d
commit 3abf44e48f
5 changed files with 110 additions and 21 deletions
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43
configure vendored
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@ -16005,11 +16005,11 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
#include <sys/syscall.h>
int main() {
const int flags = 0;
char buffer[1];
int n;
const size_t buflen = sizeof(buffer);
const int flags = 0;
/* ignore the result, Python checks for ENOSYS at runtime */
(void)syscall(SYS_getrandom, buffer, sizeof(buffer), flags);
(void)syscall(SYS_getrandom, buffer, buflen, flags);
return 0;
}
@ -16031,6 +16031,43 @@ $as_echo "#define HAVE_GETRANDOM_SYSCALL 1" >>confdefs.h
fi
# check if the getrandom() function is available
# the test was written for the Solaris function of <sys/random.h>
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for the getrandom() function" >&5
$as_echo_n "checking for the getrandom() function... " >&6; }
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#include <sys/random.h>
int main() {
char buffer[1];
const size_t buflen = sizeof(buffer);
const int flags = 0;
/* ignore the result, Python checks for ENOSYS at runtime */
(void)getrandom(buffer, buflen, flags);
return 0;
}
_ACEOF
if ac_fn_c_try_link "$LINENO"; then :
have_getrandom=yes
else
have_getrandom=no
fi
rm -f core conftest.err conftest.$ac_objext \
conftest$ac_exeext conftest.$ac_ext
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $have_getrandom" >&5
$as_echo "$have_getrandom" >&6; }
if test "$have_getrandom" = yes; then
$as_echo "#define HAVE_GETRANDOM 1" >>confdefs.h
fi
# generate output files
ac_config_files="$ac_config_files Makefile.pre Modules/Setup.config Misc/python.pc Misc/python-config.sh"