[Pkg-privacy-commits] [libgsecuredelete] 27/168: Added support for -z switch.

[Ulrike Uhlig]

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u-guest pushed a commit to branch master
in repository libgsecuredelete.

commit a845d8376e8e49c2b98b1bf908a3b2a6f1b55ff6
Author: Colomban Wendling <ban at herbesfolles.org>
Date:   Mon Oct 5 01:47:12 2009 +0200

    Added support for -z switch.
    
    Added support for the -z option of srm, sfill (and later sswap) through
    the new ZeroableOperation layer.
---
 gsecuredelete/Makefile.am             |  1 +
 gsecuredelete/delete-operation.vala   |  3 +-
 gsecuredelete/fill-operation.vala     |  8 ++---
 gsecuredelete/zeroable-operation.vala | 66 +++++++++++++++++++++++++++++++++++
 4 files changed, 71 insertions(+), 7 deletions(-)

diff --git a/gsecuredelete/Makefile.am b/gsecuredelete/Makefile.am
index 691ccdc..0b3cf43 100644
--- a/gsecuredelete/Makefile.am
+++ b/gsecuredelete/Makefile.am
@@ -10,6 +10,7 @@ libgsecuredelete_la_includedir=$(includedir)/gsecuredelete
 libgsecuredelete_la_VALAFLAGS = $(AM_VALAFLAGS) --library=libgsecuredelete -H libgsecuredelete.h
 libgsecuredelete_la_SOURCES = async-operation.vala \
                               securedelete-operation.vala \
+                              zeroable-operation.vala \
                               delete-operation.vala \
                               fill-operation.vala \
                               mem-operation.vala \
diff --git a/gsecuredelete/delete-operation.vala b/gsecuredelete/delete-operation.vala
index 1c51fa2..fdb27f9 100644
--- a/gsecuredelete/delete-operation.vala
+++ b/gsecuredelete/delete-operation.vala
@@ -21,7 +21,7 @@ using GLib;
 
 namespace SecureDelete
 {
-  public class DeleteOperation : SecureDeleteOperation
+  public class DeleteOperation : ZeroableOperation
   {
     private List<string>  _paths;
     private uint          n_files = 0;
@@ -67,6 +67,7 @@ namespace SecureDelete
       args.append ("srm");
       args.append ("-rv");
       this.add_mode_argument (ref args);
+      this.add_zeroise_argument (ref args);
       this.n_files = 0;
       foreach (unowned string path in this._paths) {
         args.append (path);
diff --git a/gsecuredelete/fill-operation.vala b/gsecuredelete/fill-operation.vala
index c6ee314..69a5820 100644
--- a/gsecuredelete/fill-operation.vala
+++ b/gsecuredelete/fill-operation.vala
@@ -19,12 +19,7 @@
 
 namespace SecureDelete
 {
-  /*
-   * TODO:
-   * perhaps add support -z.
-   */
-  
-  public class FillOperation : SecureDeleteOperation
+  public class FillOperation : ZeroableOperation
   {
     /**
      * WipeMode:
@@ -95,6 +90,7 @@ namespace SecureDelete
       args.append ("-v");
       this.add_mode_argument (ref args);
       this.add_wipe_mode_argument (ref args);
+      this.add_zeroise_argument (ref args);
       args.append (this.directory);
       
       return args;
diff --git a/gsecuredelete/zeroable-operation.vala b/gsecuredelete/zeroable-operation.vala
new file mode 100644
index 0000000..32f2022
--- /dev/null
+++ b/gsecuredelete/zeroable-operation.vala
@@ -0,0 +1,66 @@
+/* 
+ * 
+ * Copyright (C) 2009 Colomban Wendling <ban at herbesfolles.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ * 
+ */
+
+using GLib;
+
+namespace SecureDelete
+{
+  
+  /**
+   * ZeroableOperation:
+   * 
+   * A subclass of SecureDeleteOperation designed to be the base class for all
+   * SecureDelete operations that support wiping with zeros only as the last
+   * pass.
+   */
+  public abstract class ZeroableOperation : SecureDeleteOperation
+  {
+    /**
+     * zeroise:
+     * 
+     * Whether to wipe with zeros at the last pass instead of random data.
+     */
+    public bool zeroise {
+      get;
+      set;
+      default = false;
+    }
+    
+    /* returns the argument to pass to SecureDelete tools depending whether the
+     * last wiping pass should be done with zeros. %null wan be returned,
+     * meaning no argument should be added */
+    protected unowned string? get_argument_for_zeroise (bool zeroise)
+    {
+      if (zeroise) {
+        return "-z";
+      }
+      return null;
+    }
+    
+    /* adds the argument needed by the currently set zeorise setting to an
+     * argument list */
+    protected void add_zeroise_argument (ref List<string> args)
+    {
+      unowned string? arg = this.get_argument_for_zeroise (this.zeroise);
+      if (arg != null) {
+        args.append (arg);
+      }
+    }
+  }
+}

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