diff --git a/README.md b/README.md
index 21d2dbe..8831e99 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 BlackBox
 ========
 
-Safely store secrets in a VCS repo (i.e. Git, Mercurial, or Subversion). These
+Safely store secrets in a VCS repo (i.e. Git, Mercurial, Subversion or Perforce). These
 commands make it easy
 for you to Gnu Privacy Guard (GPG) encrypt specific files in a repo so they are
 "encrypted at rest" in your repository. However, the scripts
@@ -42,8 +42,8 @@ files.  Simply set up a GPG key for the Puppet master (or the role
 account that pushes new files to the Puppet master) and have that
 user run `blackbox_postdeploy` after any files are updated.
 
-Getting started is easy.  Just `cd` into a Git, Mercurial or Subversion
-repository and run `blackbox_initialize`.  After that, if a file is to
+Getting started is easy.  Just `cd` into a Git, Mercurial, Subversion or
+Perforce repository and run `blackbox_initialize`.  After that, if a file is to
 be encrypted, run `blackbox_register_new_file` and you are done.  Add
 and remove keys with `blackbox_addadmin` and `blackbox_removeadmin`.
 To view and/or edit a file, run `blackbox_edit`; this will decrypt the
@@ -117,6 +117,7 @@ It has been tested to work with many operating systems.
   * `git` -- The Git
   * `hg` -- Mercurial
   * `svn` -- SubVersion (Thanks, Ben Drasin!)
+  * `p4` -- Perforce
 * Operating system
   * CentOS / RedHat
   * MacOS X
@@ -133,7 +134,7 @@ Note: Cywin support requires the following packages:
 
   * Normal operation:
     * gnupg
-    * git or mercurial or subversion (as appropriate)
+    * git or mercurial or subversion or perforce (as appropriate)
   * Development (if you will be adding code and want to run the confidence test)
     * procps
     * make
diff --git a/bin/_blackbox_common.sh b/bin/_blackbox_common.sh
index 9e60c8a..420af23 100755
--- a/bin/_blackbox_common.sh
+++ b/bin/_blackbox_common.sh
@@ -349,6 +349,17 @@ function is_in_svn() {
     echo false
   fi
 }
+# Perforce
+function is_in_p4() {
+  local filename
+  filename="$1"
+
+  if p4 list "$filename" ; then
+    echo true
+  else
+    echo false
+  fi
+}
 
 
 # Add a file to the repo (but don't commit it).
@@ -367,6 +378,10 @@ function vcs_add_git() {
 function vcs_add_svn() {
   svn add --parents """$@"""
 }
+# Perfoce
+function vcs_add_p4() {
+  p4 add """$@"""
+}
 
 
 # Commit a file to the repo
@@ -385,6 +400,10 @@ function vcs_commit_git() {
 function vcs_commit_svn() {
   svn commit -m"""$@"""
 }
+# Perforce
+function vcs_commit_p4() {
+  p4 submit -d """$@"""
+}
 
 
 # Remove file from repo, even if it was deleted locally already.
@@ -404,3 +423,7 @@ function vcs_remove_git() {
 function vcs_remove_svn() {
   svn delete """$@"""
 }
+# Perforce
+function vcs_remove_svn() {
+  p4 delete """$@"""
+}