diff options
| -rwxr-xr-x | configure | 11 | ||||
| -rw-r--r-- | crypto/Makefile.objs | 3 | ||||
| -rw-r--r-- | crypto/random-none.c | 38 |
3 files changed, 51 insertions, 1 deletions
diff --git a/configure b/configure index bb7fd12612..997284e094 100755 --- a/configure +++ b/configure @@ -509,6 +509,7 @@ libpmem="" default_devices="yes" plugins="no" fuzzing="no" +rng_none="no" supported_cpu="no" supported_os="no" @@ -1601,6 +1602,10 @@ for opt do ;; --gdb=*) gdb_bin="$optarg" ;; + --enable-rng-none) rng_none=yes + ;; + --disable-rng-none) rng_none=no + ;; *) echo "ERROR: unknown option $opt" echo "Try '$0 --help' for more information" @@ -1898,6 +1903,7 @@ disabled with --disable-FEATURE, default is enabled if available: debug-mutex mutex debugging support libpmem libpmem support xkbcommon xkbcommon support + rng-none dummy RNG, avoid using /dev/(u)random and getrandom() NOTE: The object files are built at the place where configure is launched EOF @@ -6767,6 +6773,7 @@ echo "default devices $default_devices" echo "plugin support $plugins" echo "fuzzing support $fuzzing" echo "gdb $gdb_bin" +echo "rng-none $rng_none" if test "$supported_cpu" = "no"; then echo @@ -7744,6 +7751,10 @@ if test "$edk2_blobs" = "yes" ; then echo "DECOMPRESS_EDK2_BLOBS=y" >> $config_host_mak fi +if test "$rng_none" = "yes"; then + echo "CONFIG_RNG_NONE=y" >> $config_host_mak +fi + # use included Linux headers if test "$linux" = "yes" ; then mkdir -p linux-headers diff --git a/crypto/Makefile.objs b/crypto/Makefile.objs index c2a371b0b4..cdee92b4e5 100644 --- a/crypto/Makefile.objs +++ b/crypto/Makefile.objs @@ -35,5 +35,6 @@ crypto-obj-y += block-luks.o util-obj-$(CONFIG_GCRYPT) += random-gcrypt.o util-obj-$(if $(CONFIG_GCRYPT),n,$(CONFIG_GNUTLS)) += random-gnutls.o -util-obj-$(if $(CONFIG_GCRYPT),n,$(if $(CONFIG_GNUTLS),n,y)) += random-platform.o +util-obj-$(if $(CONFIG_GCRYPT),n,$(if $(CONFIG_GNUTLS),n,$(CONFIG_RNG_NONE))) += random-none.o +util-obj-$(if $(CONFIG_GCRYPT),n,$(if $(CONFIG_GNUTLS),n,$(if $(CONFIG_RNG_NONE),n,y))) += random-platform.o util-obj-y += aes.o init.o diff --git a/crypto/random-none.c b/crypto/random-none.c new file mode 100644 index 0000000000..102f8a4dce --- /dev/null +++ b/crypto/random-none.c @@ -0,0 +1,38 @@ +/* + * QEMU Crypto "none" random number provider + * + * Copyright (c) 2020 Marek Marczykowski-Górecki + * <marmarek@invisiblethingslab.com> + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, see <http://www.gnu.org/licenses/>. + * + */ + +#include "qemu/osdep.h" + +#include "crypto/random.h" +#include "qapi/error.h" + +int qcrypto_random_init(Error **errp) +{ + return 0; +} + +int qcrypto_random_bytes(void *buf, + size_t buflen, + Error **errp) +{ + error_setg(errp, "Random bytes not available with \"none\" rng"); + return -1; +} |