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1 #!/usr/bin/env python3 2 # group: rw 3 # 4 # Test case for encryption key management versus image sharing 5 # 6 # Copyright (C) 2019 Red Hat, Inc. 7 # 8 # This program is free software; you can redistribute it and/or modify 9 # it under the terms of the GNU General Public License as published by 10 # the Free Software Foundation; either version 2 of the License, or 11 # (at your option) any later version. 12 # 13 # This program is distributed in the hope that it will be useful, 14 # but WITHOUT ANY WARRANTY; without even the implied warranty of 15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 # GNU General Public License for more details. 17 # 18 # You should have received a copy of the GNU General Public License 19 # along with this program. If not, see <http://www.gnu.org/licenses/>. 20 # 21 22 import iotests 23 import os 24 import time 25 import json 26 27 test_img = os.path.join(iotests.test_dir, 'test.img') 28 29 class Secret: 30 def __init__(self, index): 31 self._id = "keysec" + str(index) 32 # you are not supposed to see the password... 33 self._secret = "hunter" + str(index) 34 35 def id(self): 36 return self._id 37 38 def secret(self): 39 return self._secret 40 41 def to_cmdline_object(self): 42 return [ "secret,id=" + self._id + ",data=" + self._secret] 43 44 def to_qmp_object(self): 45 return { "qom_type" : "secret", "id": self.id(), 46 "data": self.secret() } 47 48 ################################################################################ 49 50 class EncryptionSetupTestCase(iotests.QMPTestCase): 51 52 # test case startup 53 def setUp(self): 54 55 # start the VMs 56 self.vm1 = iotests.VM(path_suffix = 'VM1') 57 self.vm2 = iotests.VM(path_suffix = 'VM2') 58 self.vm1.launch() 59 self.vm2.launch() 60 61 # create the secrets and load 'em into the VMs 62 self.secrets = [ Secret(i) for i in range(0, 4) ] 63 for secret in self.secrets: 64 result = self.vm1.qmp("object-add", **secret.to_qmp_object()) 65 self.assert_qmp(result, 'return', {}) 66 result = self.vm2.qmp("object-add", **secret.to_qmp_object()) 67 self.assert_qmp(result, 'return', {}) 68 69 # test case shutdown 70 def tearDown(self): 71 # stop the VM 72 self.vm1.shutdown() 73 self.vm2.shutdown() 74 75 ########################################################################### 76 # create the encrypted block device using qemu-img 77 def createImg(self, file, secret): 78 79 iotests.qemu_img( 80 'create', 81 '--object', *secret.to_cmdline_object(), 82 '-f', iotests.imgfmt, 83 '-o', 'key-secret=' + secret.id(), 84 '-o', 'iter-time=10', 85 file, 86 '1M') 87 iotests.log('') 88 89 # attempts to add a key using qemu-img 90 def addKey(self, file, secret, new_secret): 91 92 image_options = { 93 'key-secret' : secret.id(), 94 'driver' : iotests.imgfmt, 95 'file' : { 96 'driver':'file', 97 'filename': file, 98 } 99 } 100 101 output = iotests.qemu_img( 102 'amend', 103 '--object', *secret.to_cmdline_object(), 104 '--object', *new_secret.to_cmdline_object(), 105 106 '-o', 'state=active', 107 '-o', 'new-secret=' + new_secret.id(), 108 '-o', 'iter-time=10', 109 110 "json:" + json.dumps(image_options), 111 check=False # Expected to fail. Log output. 112 ).stdout 113 114 iotests.log(output, filters=[iotests.filter_test_dir]) 115 116 ########################################################################### 117 # open an encrypted block device 118 def openImageQmp(self, vm, id, file, secret, 119 readOnly = False, reOpen = False): 120 121 command = 'blockdev-reopen' if reOpen else 'blockdev-add' 122 123 opts = { 124 'driver': iotests.imgfmt, 125 'node-name': id, 126 'read-only': readOnly, 127 'key-secret' : secret.id(), 128 'file': { 129 'driver': 'file', 130 'filename': test_img, 131 } 132 } 133 134 if reOpen: 135 result = vm.qmp(command, options=[opts]) 136 else: 137 result = vm.qmp(command, **opts) 138 self.assert_qmp(result, 'return', {}) 139 140 141 ########################################################################### 142 # add virtio-blk consumer for a block device 143 def addImageUser(self, vm, id, disk_id, share_rw=False): 144 result = vm.qmp('device_add', ** 145 { 146 'driver': 'virtio-blk', 147 'id': id, 148 'drive': disk_id, 149 'share-rw' : share_rw 150 } 151 ) 152 153 iotests.log(result) 154 155 # close the encrypted block device 156 def closeImageQmp(self, vm, id): 157 result = vm.qmp('blockdev-del', **{ 'node-name': id }) 158 self.assert_qmp(result, 'return', {}) 159 160 ########################################################################### 161 162 # add a key to an encrypted block device 163 def addKeyQmp(self, vm, id, new_secret): 164 165 args = { 166 'node-name': id, 167 'job-id' : 'job0', 168 'options' : { 169 'state' : 'active', 170 'driver' : iotests.imgfmt, 171 'new-secret': new_secret.id(), 172 'iter-time' : 10 173 }, 174 } 175 176 result = vm.qmp('x-blockdev-amend', **args) 177 iotests.log(result) 178 # Run the job only if it was created 179 event = ('JOB_STATUS_CHANGE', 180 {'data': {'id': 'job0', 'status': 'created'}}) 181 if vm.events_wait([event], timeout=0.0) is not None: 182 vm.run_job('job0') 183 184 # test that when the image opened by two qemu processes, 185 # neither of them can update the encryption keys 186 def test1(self): 187 self.createImg(test_img, self.secrets[0]); 188 189 # VM1 opens the image and adds a key 190 self.openImageQmp(self.vm1, "testdev", test_img, self.secrets[0]) 191 self.addKeyQmp(self.vm1, "testdev", new_secret = self.secrets[1]) 192 193 194 # VM2 opens the image 195 self.openImageQmp(self.vm2, "testdev", test_img, self.secrets[0]) 196 197 198 # neither VMs now should be able to add a key 199 self.addKeyQmp(self.vm1, "testdev", new_secret = self.secrets[2]) 200 self.addKeyQmp(self.vm2, "testdev", new_secret = self.secrets[2]) 201 202 203 # VM 1 closes the image 204 self.closeImageQmp(self.vm1, "testdev") 205 206 207 # now VM2 can add the key 208 self.addKeyQmp(self.vm2, "testdev", new_secret = self.secrets[2]) 209 210 211 # qemu-img should also not be able to add a key 212 self.addKey(test_img, self.secrets[0], self.secrets[2]) 213 214 # cleanup 215 self.closeImageQmp(self.vm2, "testdev") 216 os.remove(test_img) 217 218 219 # test that when the image opened by two qemu processes, 220 # even if first VM opens it read-only, the second can't update encryption 221 # keys 222 def test2(self): 223 self.createImg(test_img, self.secrets[0]); 224 225 # VM1 opens the image readonly 226 self.openImageQmp(self.vm1, "testdev", test_img, self.secrets[0], 227 readOnly = True) 228 229 # VM2 opens the image 230 self.openImageQmp(self.vm2, "testdev", test_img, self.secrets[0]) 231 232 # VM1 can't add a key since image is readonly 233 self.addKeyQmp(self.vm1, "testdev", new_secret = self.secrets[2]) 234 235 # VM2 can't add a key since VM is has the image opened 236 self.addKeyQmp(self.vm2, "testdev", new_secret = self.secrets[2]) 237 238 239 #VM1 reopens the image read-write 240 self.openImageQmp(self.vm1, "testdev", test_img, self.secrets[0], 241 reOpen = True, readOnly = False) 242 243 # VM1 still can't add the key 244 self.addKeyQmp(self.vm1, "testdev", new_secret = self.secrets[2]) 245 246 # VM2 gets away 247 self.closeImageQmp(self.vm2, "testdev") 248 249 # VM1 now can add the key 250 self.addKeyQmp(self.vm1, "testdev", new_secret = self.secrets[2]) 251 252 self.closeImageQmp(self.vm1, "testdev") 253 os.remove(test_img) 254 255 # test that two VMs can't open the same luks image by default 256 # and attach it to a guest device 257 def test3(self): 258 self.createImg(test_img, self.secrets[0]); 259 260 self.openImageQmp(self.vm1, "testdev", test_img, self.secrets[0]) 261 self.addImageUser(self.vm1, "testctrl", "testdev") 262 263 self.openImageQmp(self.vm2, "testdev", test_img, self.secrets[0]) 264 self.addImageUser(self.vm2, "testctrl", "testdev") 265 266 267 # test that two VMs can attach the same luks image to a guest device, 268 # if both use share-rw=on 269 def test4(self): 270 self.createImg(test_img, self.secrets[0]); 271 272 self.openImageQmp(self.vm1, "testdev", test_img, self.secrets[0]) 273 self.addImageUser(self.vm1, "testctrl", "testdev", share_rw=True) 274 275 self.openImageQmp(self.vm2, "testdev", test_img, self.secrets[0]) 276 self.addImageUser(self.vm2, "testctrl", "testdev", share_rw=True) 277 278 279 280 if __name__ == '__main__': 281 # support only raw luks since luks encrypted qcow2 is a proper 282 # format driver which doesn't allow any sharing 283 iotests.activate_logging() 284 iotests.main(supported_fmts = ['luks'])