ac1d887849
Introduce a new QCryptoSecret object class which will be used
for providing passwords and keys to other objects which need
sensitive credentials.
The new object can provide secret values directly as properties,
or indirectly via a file. The latter includes support for file
descriptor passing syntax on UNIX platforms. Ordinarily passing
secret values directly as properties is insecure, since they
are visible in process listings, or in log files showing the
CLI args / QMP commands. It is possible to use AES-256-CBC to
encrypt the secret values though, in which case all that is
visible is the ciphertext. For ad hoc developer testing though,
it is fine to provide the secrets directly without encryption
so this is not explicitly forbidden.
The anticipated scenario is that libvirtd will create a random
master key per QEMU instance (eg /var/run/libvirt/qemu/$VMNAME.key)
and will use that key to encrypt all passwords it provides to
QEMU via '-object secret,....'. This avoids the need for libvirt
(or other mgmt apps) to worry about file descriptor passing.
It also makes life easier for people who are scripting the
management of QEMU, for whom FD passing is significantly more
complex.
Providing data inline (insecure, only for ad hoc dev testing)
$QEMU -object secret,id=sec0,data=letmein
Providing data indirectly in raw format
printf "letmein" > mypasswd.txt
$QEMU -object secret,id=sec0,file=mypasswd.txt
Providing data indirectly in base64 format
$QEMU -object secret,id=sec0,file=mykey.b64,format=base64
Providing data with encryption
$QEMU -object secret,id=master0,file=mykey.b64,format=base64 \
-object secret,id=sec0,data=[base64 ciphertext],\
keyid=master0,iv=[base64 IV],format=base64
Note that 'format' here refers to the format of the ciphertext
data. The decrypted data must always be in raw byte format.
More examples are shown in the updated docs.
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
453 lines
11 KiB
C
453 lines
11 KiB
C
/*
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* QEMU Crypto secret handling
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*
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* Copyright (c) 2015 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include <glib.h>
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#include "crypto/init.h"
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#include "crypto/secret.h"
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static void test_secret_direct(void)
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{
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Object *sec = object_new_with_props(
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TYPE_QCRYPTO_SECRET,
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object_get_objects_root(),
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"sec0",
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&error_abort,
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"data", "123456",
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NULL);
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char *pw = qcrypto_secret_lookup_as_utf8("sec0",
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&error_abort);
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g_assert_cmpstr(pw, ==, "123456");
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object_unparent(sec);
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g_free(pw);
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}
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static void test_secret_indirect_good(void)
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{
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Object *sec;
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char *fname = NULL;
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int fd = g_file_open_tmp("secretXXXXXX",
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&fname,
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NULL);
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g_assert(fd >= 0);
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g_assert_nonnull(fname);
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g_assert(write(fd, "123456", 6) == 6);
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sec = object_new_with_props(
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TYPE_QCRYPTO_SECRET,
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object_get_objects_root(),
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"sec0",
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&error_abort,
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"file", fname,
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NULL);
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char *pw = qcrypto_secret_lookup_as_utf8("sec0",
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&error_abort);
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g_assert_cmpstr(pw, ==, "123456");
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object_unparent(sec);
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g_free(pw);
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close(fd);
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g_free(fname);
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}
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static void test_secret_indirect_badfile(void)
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{
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Object *sec = object_new_with_props(
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TYPE_QCRYPTO_SECRET,
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object_get_objects_root(),
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"sec0",
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NULL,
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"file", "does-not-exist",
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NULL);
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g_assert(sec == NULL);
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}
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static void test_secret_indirect_emptyfile(void)
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{
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Object *sec;
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char *fname = NULL;
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int fd = g_file_open_tmp("secretXXXXXX",
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&fname,
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NULL);
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g_assert(fd >= 0);
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g_assert_nonnull(fname);
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sec = object_new_with_props(
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TYPE_QCRYPTO_SECRET,
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object_get_objects_root(),
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"sec0",
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&error_abort,
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"file", fname,
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NULL);
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char *pw = qcrypto_secret_lookup_as_utf8("sec0",
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&error_abort);
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g_assert_cmpstr(pw, ==, "");
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object_unparent(sec);
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g_free(pw);
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close(fd);
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g_free(fname);
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}
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static void test_secret_noconv_base64_good(void)
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{
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Object *sec = object_new_with_props(
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TYPE_QCRYPTO_SECRET,
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object_get_objects_root(),
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"sec0",
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&error_abort,
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"data", "MTIzNDU2",
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"format", "base64",
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NULL);
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char *pw = qcrypto_secret_lookup_as_base64("sec0",
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&error_abort);
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g_assert_cmpstr(pw, ==, "MTIzNDU2");
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object_unparent(sec);
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g_free(pw);
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}
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static void test_secret_noconv_base64_bad(void)
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{
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Object *sec = object_new_with_props(
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TYPE_QCRYPTO_SECRET,
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object_get_objects_root(),
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"sec0",
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NULL,
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"data", "MTI$NDU2",
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"format", "base64",
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NULL);
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g_assert(sec == NULL);
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}
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static void test_secret_noconv_utf8(void)
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{
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Object *sec = object_new_with_props(
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TYPE_QCRYPTO_SECRET,
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object_get_objects_root(),
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"sec0",
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&error_abort,
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"data", "123456",
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"format", "raw",
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NULL);
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char *pw = qcrypto_secret_lookup_as_utf8("sec0",
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&error_abort);
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g_assert_cmpstr(pw, ==, "123456");
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object_unparent(sec);
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g_free(pw);
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}
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static void test_secret_conv_base64_utf8valid(void)
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{
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Object *sec = object_new_with_props(
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TYPE_QCRYPTO_SECRET,
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object_get_objects_root(),
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"sec0",
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&error_abort,
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"data", "MTIzNDU2",
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"format", "base64",
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NULL);
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char *pw = qcrypto_secret_lookup_as_utf8("sec0",
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&error_abort);
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g_assert_cmpstr(pw, ==, "123456");
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object_unparent(sec);
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g_free(pw);
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}
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static void test_secret_conv_base64_utf8invalid(void)
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{
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Object *sec = object_new_with_props(
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TYPE_QCRYPTO_SECRET,
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object_get_objects_root(),
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"sec0",
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&error_abort,
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"data", "f0VMRgIBAQAAAA==",
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"format", "base64",
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NULL);
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char *pw = qcrypto_secret_lookup_as_utf8("sec0",
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NULL);
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g_assert(pw == NULL);
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object_unparent(sec);
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}
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static void test_secret_conv_utf8_base64(void)
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{
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Object *sec = object_new_with_props(
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TYPE_QCRYPTO_SECRET,
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object_get_objects_root(),
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"sec0",
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&error_abort,
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"data", "123456",
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NULL);
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char *pw = qcrypto_secret_lookup_as_base64("sec0",
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&error_abort);
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g_assert_cmpstr(pw, ==, "MTIzNDU2");
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object_unparent(sec);
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g_free(pw);
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}
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static void test_secret_crypt_raw(void)
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{
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Object *master = object_new_with_props(
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TYPE_QCRYPTO_SECRET,
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object_get_objects_root(),
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"master",
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&error_abort,
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"data", "9miloPQCzGy+TL6aonfzVcptibCmCIhKzrnlfwiWivk=",
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"format", "base64",
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NULL);
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Object *sec = object_new_with_props(
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TYPE_QCRYPTO_SECRET,
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object_get_objects_root(),
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"sec0",
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&error_abort,
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"data",
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"\xCC\xBF\xF7\x09\x46\x19\x0B\x52\x2A\x3A\xB4\x6B\xCD\x7A\xB0\xB0",
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"format", "raw",
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"keyid", "master",
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"iv", "0I7Gw/TKuA+Old2W2apQ3g==",
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NULL);
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char *pw = qcrypto_secret_lookup_as_utf8("sec0",
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&error_abort);
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g_assert_cmpstr(pw, ==, "123456");
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object_unparent(sec);
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object_unparent(master);
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g_free(pw);
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}
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static void test_secret_crypt_base64(void)
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{
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Object *master = object_new_with_props(
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TYPE_QCRYPTO_SECRET,
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object_get_objects_root(),
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"master",
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&error_abort,
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"data", "9miloPQCzGy+TL6aonfzVcptibCmCIhKzrnlfwiWivk=",
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"format", "base64",
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NULL);
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Object *sec = object_new_with_props(
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TYPE_QCRYPTO_SECRET,
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object_get_objects_root(),
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"sec0",
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&error_abort,
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"data", "zL/3CUYZC1IqOrRrzXqwsA==",
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"format", "base64",
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"keyid", "master",
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"iv", "0I7Gw/TKuA+Old2W2apQ3g==",
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NULL);
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char *pw = qcrypto_secret_lookup_as_utf8("sec0",
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&error_abort);
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g_assert_cmpstr(pw, ==, "123456");
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object_unparent(sec);
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object_unparent(master);
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g_free(pw);
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}
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static void test_secret_crypt_short_key(void)
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{
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Object *master = object_new_with_props(
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TYPE_QCRYPTO_SECRET,
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object_get_objects_root(),
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"master",
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&error_abort,
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"data", "9miloPQCzGy+TL6aonfzVc",
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"format", "base64",
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NULL);
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Object *sec = object_new_with_props(
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TYPE_QCRYPTO_SECRET,
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object_get_objects_root(),
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"sec0",
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NULL,
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"data", "zL/3CUYZC1IqOrRrzXqwsA==",
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"format", "raw",
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"keyid", "master",
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"iv", "0I7Gw/TKuA+Old2W2apQ3g==",
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NULL);
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g_assert(sec == NULL);
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object_unparent(master);
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}
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static void test_secret_crypt_short_iv(void)
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{
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Object *master = object_new_with_props(
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TYPE_QCRYPTO_SECRET,
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object_get_objects_root(),
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"master",
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&error_abort,
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"data", "9miloPQCzGy+TL6aonfzVcptibCmCIhKzrnlfwiWivk=",
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"format", "base64",
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NULL);
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Object *sec = object_new_with_props(
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TYPE_QCRYPTO_SECRET,
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object_get_objects_root(),
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"sec0",
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NULL,
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"data", "zL/3CUYZC1IqOrRrzXqwsA==",
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"format", "raw",
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"keyid", "master",
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"iv", "0I7Gw/TKuA+Old2W2a",
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NULL);
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g_assert(sec == NULL);
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object_unparent(master);
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}
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static void test_secret_crypt_missing_iv(void)
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{
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Object *master = object_new_with_props(
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TYPE_QCRYPTO_SECRET,
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object_get_objects_root(),
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"master",
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&error_abort,
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"data", "9miloPQCzGy+TL6aonfzVcptibCmCIhKzrnlfwiWivk=",
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"format", "base64",
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NULL);
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Object *sec = object_new_with_props(
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TYPE_QCRYPTO_SECRET,
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object_get_objects_root(),
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"sec0",
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NULL,
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"data", "zL/3CUYZC1IqOrRrzXqwsA==",
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"format", "raw",
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"keyid", "master",
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NULL);
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g_assert(sec == NULL);
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object_unparent(master);
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}
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static void test_secret_crypt_bad_iv(void)
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{
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Object *master = object_new_with_props(
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TYPE_QCRYPTO_SECRET,
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object_get_objects_root(),
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"master",
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&error_abort,
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"data", "9miloPQCzGy+TL6aonfzVcptibCmCIhKzrnlfwiWivk=",
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"format", "base64",
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NULL);
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Object *sec = object_new_with_props(
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TYPE_QCRYPTO_SECRET,
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object_get_objects_root(),
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"sec0",
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NULL,
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"data", "zL/3CUYZC1IqOrRrzXqwsA==",
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"format", "raw",
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"keyid", "master",
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"iv", "0I7Gw/TK$$uA+Old2W2a",
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NULL);
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g_assert(sec == NULL);
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object_unparent(master);
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}
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int main(int argc, char **argv)
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{
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module_call_init(MODULE_INIT_QOM);
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g_test_init(&argc, &argv, NULL);
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g_assert(qcrypto_init(NULL) == 0);
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g_test_add_func("/crypto/secret/direct",
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test_secret_direct);
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g_test_add_func("/crypto/secret/indirect/good",
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test_secret_indirect_good);
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g_test_add_func("/crypto/secret/indirect/badfile",
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test_secret_indirect_badfile);
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g_test_add_func("/crypto/secret/indirect/emptyfile",
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test_secret_indirect_emptyfile);
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g_test_add_func("/crypto/secret/noconv/base64/good",
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test_secret_noconv_base64_good);
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g_test_add_func("/crypto/secret/noconv/base64/bad",
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test_secret_noconv_base64_bad);
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g_test_add_func("/crypto/secret/noconv/utf8",
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test_secret_noconv_utf8);
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g_test_add_func("/crypto/secret/conv/base64/utf8valid",
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test_secret_conv_base64_utf8valid);
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g_test_add_func("/crypto/secret/conv/base64/utf8invalid",
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test_secret_conv_base64_utf8invalid);
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g_test_add_func("/crypto/secret/conv/utf8/base64",
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test_secret_conv_utf8_base64);
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g_test_add_func("/crypto/secret/crypt/raw",
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test_secret_crypt_raw);
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g_test_add_func("/crypto/secret/crypt/base64",
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test_secret_crypt_base64);
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g_test_add_func("/crypto/secret/crypt/shortkey",
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test_secret_crypt_short_key);
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g_test_add_func("/crypto/secret/crypt/shortiv",
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test_secret_crypt_short_iv);
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g_test_add_func("/crypto/secret/crypt/missingiv",
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test_secret_crypt_missing_iv);
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g_test_add_func("/crypto/secret/crypt/badiv",
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test_secret_crypt_bad_iv);
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return g_test_run();
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}
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