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[libvirt] [PATCH 3/3] storage: Allow inputvol to be encrypted



https://bugzilla.redhat.com/show_bug.cgi?id=1613737

When processing the inputvol for encryption, we need to handle
the case where the inputvol is encrypted. This then allows for
the encrypted inputvol to be used either for an output encrypted
volume or an output volume of some XML provided type.

Add tests to show the various conversion options when either input
or output is encrypted. This includes when both are encrypted.

Signed-off-by: John Ferlan <jferlan redhat com>
---
 src/storage/storage_util.c                    | 62 ++++++++++++++++---
 src/storage/storage_util.h                    |  1 +
 .../luks-convert-encrypt.argv                 | 11 ++++
 .../luks-convert-encrypt2fileqcow2.argv       |  7 +++
 .../luks-convert-encrypt2fileraw.argv         |  7 +++
 tests/storagevolxml2argvtest.c                | 15 ++++-
 tests/storagevolxml2xmlin/vol-encrypt1.xml    | 21 +++++++
 tests/storagevolxml2xmlin/vol-encrypt2.xml    | 21 +++++++
 8 files changed, 137 insertions(+), 8 deletions(-)
 create mode 100644 tests/storagevolxml2argvdata/luks-convert-encrypt.argv
 create mode 100644 tests/storagevolxml2argvdata/luks-convert-encrypt2fileqcow2.argv
 create mode 100644 tests/storagevolxml2argvdata/luks-convert-encrypt2fileraw.argv
 create mode 100644 tests/storagevolxml2xmlin/vol-encrypt1.xml
 create mode 100644 tests/storagevolxml2xmlin/vol-encrypt2.xml

diff --git a/src/storage/storage_util.c b/src/storage/storage_util.c
index cc49a5b9f7..3c1e875b27 100644
--- a/src/storage/storage_util.c
+++ b/src/storage/storage_util.c
@@ -1084,6 +1084,7 @@ virStorageBackendCreateQemuImgCmdFromVol(virStoragePoolObjPtr pool,
                                          unsigned int flags,
                                          const char *create_tool,
                                          const char *secretPath,
+                                         const char *inputSecretPath,
                                          virStorageVolEncryptConvertStep convertStep)
 {
     virCommandPtr cmd = NULL;
@@ -1101,6 +1102,8 @@ virStorageBackendCreateQemuImgCmdFromVol(virStoragePoolObjPtr pool,
         .secretAlias = NULL,
     };
     virStorageEncryptionPtr enc = vol->target.encryption;
+    char *inputSecretAlias = NULL;
+    virStorageEncryptionPtr inputenc = inputvol ? inputvol->target.encryption : NULL;
     virStorageEncryptionInfoDefPtr encinfo = NULL;
 
     virCheckFlags(VIR_STORAGE_VOL_CREATE_PREALLOC_METADATA, NULL);
@@ -1114,6 +1117,12 @@ virStorageBackendCreateQemuImgCmdFromVol(virStoragePoolObjPtr pool,
         goto error;
     }
 
+    if (inputenc && inputenc->format != VIR_STORAGE_ENCRYPTION_FORMAT_LUKS) {
+        virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                       _("encryption format of inputvol must be LUKS"));
+        goto error;
+    }
+
     if (virStorageBackendCreateQemuImgSetInfo(pool, vol, inputvol,
                                               convertStep, &info) < 0)
         goto error;
@@ -1153,6 +1162,20 @@ virStorageBackendCreateQemuImgCmdFromVol(virStoragePoolObjPtr pool,
         encinfo = &enc->encinfo;
     }
 
+    if (inputenc && convertStep == VIR_STORAGE_VOL_ENCRYPT_CONVERT) {
+        if (!inputSecretPath) {
+            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                           _("path to inputvol secret data file is required"));
+            goto error;
+        }
+        if (virAsprintf(&inputSecretAlias, "%s_encrypt0",
+                        inputvol->name) < 0)
+            goto error;
+        if (storageBackendCreateQemuImgSecretObject(cmd, inputSecretPath,
+                                                    inputSecretAlias) < 0)
+            goto error;
+    }
+
     if (convertStep != VIR_STORAGE_VOL_ENCRYPT_CONVERT) {
         if (storageBackendCreateQemuImgSetOptions(cmd, encinfo, info) < 0)
             goto error;
@@ -1163,19 +1186,32 @@ virStorageBackendCreateQemuImgCmdFromVol(virStoragePoolObjPtr pool,
             virCommandAddArgFormat(cmd, "%lluK", info.size_arg);
     } else {
         /* source */
-        virCommandAddArgFormat(cmd, "driver=%s,file.filename=%s",
-                               info.inputType, info.inputPath);
+        if (inputenc)
+            virCommandAddArgFormat(cmd,
+                                   "driver=luks,file.filename=%s,key-secret=%s",
+                                   info.inputPath, inputSecretAlias);
+        else
+            virCommandAddArgFormat(cmd, "driver=%s,file.filename=%s",
+                                   info.inputType, info.inputPath);
 
         /* dest */
-        virCommandAddArgFormat(cmd, "driver=%s,file.filename=%s,key-secret=%s",
-                               info.type, info.path, info.secretAlias);
+        if (enc)
+            virCommandAddArgFormat(cmd,
+                                   "driver=%s,file.filename=%s,key-secret=%s",
+                                   info.type, info.path, info.secretAlias);
+        else
+            virCommandAddArgFormat(cmd, "driver=%s,file.filename=%s",
+                                   info.type, info.path);
+
     }
     VIR_FREE(info.secretAlias);
+    VIR_FREE(inputSecretAlias);
 
     return cmd;
 
  error:
     VIR_FREE(info.secretAlias);
+    VIR_FREE(inputSecretAlias);
     virCommandFree(cmd);
     return NULL;
 }
@@ -1261,6 +1297,7 @@ storageBackendDoCreateQemuImg(virStoragePoolObjPtr pool,
                               unsigned int flags,
                               const char *create_tool,
                               const char *secretPath,
+                              const char *inputSecretPath,
                               virStorageVolEncryptConvertStep convertStep)
 {
     int ret;
@@ -1268,7 +1305,8 @@ storageBackendDoCreateQemuImg(virStoragePoolObjPtr pool,
 
     cmd = virStorageBackendCreateQemuImgCmdFromVol(pool, vol, inputvol,
                                                    flags, create_tool,
-                                                   secretPath, convertStep);
+                                                   secretPath, inputSecretPath,
+                                                   convertStep);
     if (!cmd)
         return -1;
 
@@ -1289,6 +1327,7 @@ storageBackendCreateQemuImg(virStoragePoolObjPtr pool,
     int ret = -1;
     char *create_tool;
     char *secretPath = NULL;
+    char *inputSecretPath = NULL;
     virStorageVolEncryptConvertStep convertStep = VIR_STORAGE_VOL_ENCRYPT_NONE;
 
     virCheckFlags(VIR_STORAGE_VOL_CREATE_PREALLOC_METADATA, -1);
@@ -1305,16 +1344,21 @@ storageBackendCreateQemuImg(virStoragePoolObjPtr pool,
         !(secretPath = storageBackendCreateQemuImgSecretPath(pool, vol)))
         goto cleanup;
 
+    if (inputvol && inputvol->target.encryption &&
+        !(inputSecretPath = storageBackendCreateQemuImgSecretPath(pool,
+                                                                  inputvol)))
+        goto cleanup;
+
     /* Using an input file for encryption requires a multi-step process
      * to create an image of the same size as the inputvol and then to
      * convert the inputvol afterwards. */
-    if (secretPath && inputvol)
+    if ((secretPath || inputSecretPath) && inputvol)
         convertStep = VIR_STORAGE_VOL_ENCRYPT_CREATE;
 
     do {
         ret = storageBackendDoCreateQemuImg(pool, vol, inputvol, flags,
                                             create_tool, secretPath,
-                                            convertStep);
+                                            inputSecretPath, convertStep);
 
         /* Failure to convert, attempt to delete what we created */
         if (ret < 0 && convertStep == VIR_STORAGE_VOL_ENCRYPT_CONVERT)
@@ -1336,6 +1380,10 @@ storageBackendCreateQemuImg(virStoragePoolObjPtr pool,
         unlink(secretPath);
         VIR_FREE(secretPath);
     }
+    if (inputSecretPath) {
+        unlink(inputSecretPath);
+        VIR_FREE(inputSecretPath);
+    }
     VIR_FREE(create_tool);
     return ret;
 }
diff --git a/src/storage/storage_util.h b/src/storage/storage_util.h
index 6fc8e8972c..58b991c772 100644
--- a/src/storage/storage_util.h
+++ b/src/storage/storage_util.h
@@ -167,6 +167,7 @@ virStorageBackendCreateQemuImgCmdFromVol(virStoragePoolObjPtr pool,
                                          unsigned int flags,
                                          const char *create_tool,
                                          const char *secretPath,
+                                         const char *inputSecretPath,
                                          virStorageVolEncryptConvertStep convertStep);
 
 int virStorageBackendSCSIFindLUs(virStoragePoolObjPtr pool,
diff --git a/tests/storagevolxml2argvdata/luks-convert-encrypt.argv b/tests/storagevolxml2argvdata/luks-convert-encrypt.argv
new file mode 100644
index 0000000000..b2ad16b7cb
--- /dev/null
+++ b/tests/storagevolxml2argvdata/luks-convert-encrypt.argv
@@ -0,0 +1,11 @@
+qemu-img create -f luks \
+--object secret,id=encrypt2.img_encrypt0,file=/path/to/secretFile \
+-o key-secret=encrypt2.img_encrypt0 \
+/var/lib/libvirt/images/encrypt2.img 5242880K
+qemu-img convert --image-opts -n --target-image-opts \
+--object secret,id=encrypt2.img_encrypt0,file=/path/to/secretFile \
+--object secret,id=encrypt1.img_encrypt0,file=/path/to/inputSecretFile \
+driver=luks,file.filename=/var/lib/libvirt/images/encrypt1.img,\
+key-secret=encrypt1.img_encrypt0 \
+driver=luks,file.filename=/var/lib/libvirt/images/encrypt2.img,\
+key-secret=encrypt2.img_encrypt0
diff --git a/tests/storagevolxml2argvdata/luks-convert-encrypt2fileqcow2.argv b/tests/storagevolxml2argvdata/luks-convert-encrypt2fileqcow2.argv
new file mode 100644
index 0000000000..82cb364b61
--- /dev/null
+++ b/tests/storagevolxml2argvdata/luks-convert-encrypt2fileqcow2.argv
@@ -0,0 +1,7 @@
+qemu-img create -f qcow2 \
+-o compat=0.10 /var/lib/libvirt/images/sparse-qcow2.img 1073741824K
+qemu-img convert --image-opts -n --target-image-opts \
+--object secret,id=encrypt2.img_encrypt0,file=/path/to/inputSecretFile \
+driver=luks,file.filename=/var/lib/libvirt/images/encrypt2.img,\
+key-secret=encrypt2.img_encrypt0 \
+driver=qcow2,file.filename=/var/lib/libvirt/images/sparse-qcow2.img
diff --git a/tests/storagevolxml2argvdata/luks-convert-encrypt2fileraw.argv b/tests/storagevolxml2argvdata/luks-convert-encrypt2fileraw.argv
new file mode 100644
index 0000000000..2661c345a8
--- /dev/null
+++ b/tests/storagevolxml2argvdata/luks-convert-encrypt2fileraw.argv
@@ -0,0 +1,7 @@
+qemu-img create -f raw \
+/var/lib/libvirt/images/sparse.img 1073741824K
+qemu-img convert --image-opts -n --target-image-opts \
+--object secret,id=encrypt2.img_encrypt0,file=/path/to/inputSecretFile \
+driver=luks,file.filename=/var/lib/libvirt/images/encrypt2.img,\
+key-secret=encrypt2.img_encrypt0 \
+driver=raw,file.filename=/var/lib/libvirt/images/sparse.img
diff --git a/tests/storagevolxml2argvtest.c b/tests/storagevolxml2argvtest.c
index 6a9a080dd1..105705f348 100644
--- a/tests/storagevolxml2argvtest.c
+++ b/tests/storagevolxml2argvtest.c
@@ -85,7 +85,7 @@ testCompareXMLToArgvFiles(bool shouldFail,
      * convert the inputvol afterwards. Since we only care about the
      * command line we have to copy code from storageBackendCreateQemuImg
      * and adjust it for the test needs. */
-    if (inputvol && vol->target.encryption)
+    if (inputvol && (vol->target.encryption || inputvol->target.encryption))
         convertStep = VIR_STORAGE_VOL_ENCRYPT_CREATE;
 
     do {
@@ -93,6 +93,7 @@ testCompareXMLToArgvFiles(bool shouldFail,
                                                        inputvol, flags,
                                                        create_tool,
                                                        "/path/to/secretFile",
+                                                       "/path/to/inputSecretFile",
                                                        convertStep);
         if (!cmd) {
             if (shouldFail) {
@@ -288,6 +289,18 @@ mymain(void)
             "pool-dir", "vol-file-qcow2",
             "luks-convert-qcow2", 0);
 
+    DO_TEST("pool-dir", "vol-encrypt2",
+            "pool-dir", "vol-encrypt1",
+            "luks-convert-encrypt", 0);
+
+    DO_TEST("pool-dir", "vol-file",
+            "pool-dir", "vol-encrypt2",
+            "luks-convert-encrypt2fileraw", 0);
+
+    DO_TEST("pool-dir", "vol-file-qcow2",
+            "pool-dir", "vol-encrypt2",
+            "luks-convert-encrypt2fileqcow2", 0);
+
     return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
 }
 
diff --git a/tests/storagevolxml2xmlin/vol-encrypt1.xml b/tests/storagevolxml2xmlin/vol-encrypt1.xml
new file mode 100644
index 0000000000..681734dc7b
--- /dev/null
+++ b/tests/storagevolxml2xmlin/vol-encrypt1.xml
@@ -0,0 +1,21 @@
+<volume>
+  <name>encrypt1.img</name>
+  <key>/var/lib/libvirt/images/encrypt1.img</key>
+  <source>
+  </source>
+  <capacity unit="G">5</capacity>
+  <allocation>294912</allocation>
+  <target>
+    <path>/var/lib/libvirt/images/encrypt1.img</path>
+    <format type='raw'/>
+    <permissions>
+      <mode>0644</mode>
+      <owner>0</owner>
+      <group>0</group>
+      <label>unconfined_u:object_r:virt_image_t:s0</label>
+    </permissions>
+    <encryption format='luks'>
+      <secret type='passphrase' uuid='e78d4b51-a2af-485f-b0f5-afca709a80f4'/>
+    </encryption>
+  </target>
+</volume>
diff --git a/tests/storagevolxml2xmlin/vol-encrypt2.xml b/tests/storagevolxml2xmlin/vol-encrypt2.xml
new file mode 100644
index 0000000000..0507d3b9e6
--- /dev/null
+++ b/tests/storagevolxml2xmlin/vol-encrypt2.xml
@@ -0,0 +1,21 @@
+<volume>
+  <name>encrypt2.img</name>
+  <key>/var/lib/libvirt/images/encrypt2.img</key>
+  <source>
+  </source>
+  <capacity unit="G">5</capacity>
+  <allocation>294912</allocation>
+  <target>
+    <path>/var/lib/libvirt/images/encrypt2.img</path>
+    <format type='raw'/>
+    <permissions>
+      <mode>0644</mode>
+      <owner>0</owner>
+      <group>0</group>
+      <label>unconfined_u:object_r:virt_image_t:s0</label>
+    </permissions>
+    <encryption format='luks'>
+      <secret type='passphrase' uuid='e78d4b51-a2af-485f-b0f5-afca709af480'/>
+    </encryption>
+  </target>
+</volume>
-- 
2.17.1


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