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diff --git a/.gitignore b/.gitignore
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+/Makefile.in
+/aclocal.m4
+/autom4te.cache/
+/build-aux/
+/config.log
+/config.status
+/configure
+/pre-inst-env
+/scripts/shroud
+/Makefile
+*.go
diff --git a/COPYING b/COPYING
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--- /dev/null
+++ b/COPYING
@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
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+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    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/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
diff --git a/Makefile.am b/Makefile.am
new file mode 100644
index 0000000..655a5ab
--- /dev/null
+++ b/Makefile.am
@@ -0,0 +1,44 @@
+## Shroud
+## Copyright © 2015 David Thompson <davet@gnu.org>
+##
+## Shroud 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.
+##
+## Shroud 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 Shroud.  If not, see <http://www.gnu.org/licenses/>.
+
+GOBJECTS = $(SOURCES:%.scm=%.go)
+
+nobase_mod_DATA = $(SOURCES) $(NOCOMP_SOURCES)
+nobase_go_DATA = $(GOBJECTS)
+
+# Make sure source files are installed first, so that the mtime of
+# installed compiled files is greater than that of installed source
+# files.  See
+# <http://lists.gnu.org/archive/html/guile-devel/2010-07/msg00125.html>
+# for details.
+guile_install_go_files = install-nobase_goDATA
+$(guile_install_go_files): install-nobase_modDATA
+
+CLEANFILES = $(GOBJECTS)
+EXTRA_DIST = $(SOURCES) $(NOCOMP_SOURCES)
+GUILE_WARNINGS = -Wunbound-variable -Warity-mismatch -Wformat
+SUFFIXES = .scm .go
+.scm.go:
+	$(AM_V_GEN)$(top_builddir)/pre-inst-env $(GUILE_TOOLS) compile $(GUILE_WARNINGS) -o "$@" "$<"
+
+moddir=$(prefix)/share/guile/site/2.0
+godir=$(libdir)/guile/2.0/ccache
+
+SOURCES = 					\
+  shroud/config.scm				\
+  shroud/utils.scm				\
+  shroud/secret.scm				\
+  shroud/ui.scm
diff --git a/README b/README
new file mode 100644
index 0000000..ba3f1a9
--- /dev/null
+++ b/README
@@ -0,0 +1,37 @@
+-*- mode: org -*-
+
+Shroud is a simple password manager with a command line interface.
+The password database is stored as a Scheme s-expression and encrypted
+with a [[gnupg.org][GnuPG]] key.
+
+* Usage
+
+  #+BEGIN_SRC sh
+    # Add a new password
+    shroud add "bank account" hackme
+
+    # Show a saved password
+    shroud show "bank account"
+
+    # Show all passwords
+    shroud list-all
+
+    # Delete a password
+    shroud remove "personal email"
+
+    # Delete all passwords
+    shroud clear
+  #+END_SRC
+
+* Dependencies
+
+  - GNU Guile >= 2.0.11
+  - GnuPG >= 1.4
+
+* Installation
+
+  Shroud uses the familiar GNU build system.
+
+  #+BEGIN_SRC sh
+    ./bootstrap && ./configure && make && make install
+  #+END_SRC
diff --git a/bootstrap b/bootstrap
new file mode 100755
index 0000000..872167c
--- /dev/null
+++ b/bootstrap
@@ -0,0 +1,3 @@
+#!/bin/sh
+
+autoreconf -vif
diff --git a/configure.ac b/configure.ac
new file mode 100644
index 0000000..4b6de58
--- /dev/null
+++ b/configure.ac
@@ -0,0 +1,15 @@
+dnl -*- Autoconf -*-
+
+AC_INIT(Shroud, 0.1)
+AC_CONFIG_SRCDIR(shroud)
+AC_CONFIG_AUX_DIR([build-aux])
+AM_INIT_AUTOMAKE([color-tests -Wall -Wno-portability foreign])
+AM_SILENT_RULES([yes])
+
+AC_CONFIG_FILES([Makefile])
+AC_CONFIG_FILES([pre-inst-env], [chmod +x pre-inst-env])
+AC_CONFIG_FILES([scripts/shroud], [chmod +x scripts/shroud])
+
+GUILE_PROGS([2.0.11])
+
+AC_OUTPUT
diff --git a/package.scm b/package.scm
new file mode 100644
index 0000000..edbba90
--- /dev/null
+++ b/package.scm
@@ -0,0 +1,46 @@
+;;; Shroud
+;;; Copyright © 2015 David Thompson <davet@gnu.org>
+;;;
+;;; Shroud 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.
+;;;
+;;; Shroud 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 Shroud.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+;;
+;; Development environment for GNU Guix.
+;;
+;;; Code:
+
+(use-modules (guix packages)
+             (guix licenses)
+             (guix build-system gnu)
+             (gnu))
+(use-package-modules autotools pkg-config guile gnupg)
+
+(package
+  (name "shroud")
+  (version "0.1")
+  (source (dirname (current-filename)))
+  (build-system gnu-build-system)
+  (native-inputs
+   `(("pkg-config" ,pkg-config)
+     ("autoconf" ,autoconf)
+     ("automake" ,automake)))
+  (inputs
+   `(("guile" ,guile-2.0)
+     ("gnupg" ,gnupg)))
+  (synopsis "Simple password manager")
+  (description "Shroud is a simple password manager with a
+command-line interface.  The password database is stored as a Scheme
+s-expression and encrypted with a GPG key.")
+  (home-page "http://dthompson.us/pages/software/shroud.html")
+  (license gpl3+))
diff --git a/pre-inst-env.in b/pre-inst-env.in
new file mode 100644
index 0000000..2e3eca2
--- /dev/null
+++ b/pre-inst-env.in
@@ -0,0 +1,26 @@
+#!/bin/sh
+
+## Shroud
+## Copyright © 2015 David Thompson <davet@gnu.org>
+##
+## Shroud 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.
+##
+## Shroud 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 Shroud.  If not, see <http://www.gnu.org/licenses/>.
+
+abs_top_srcdir="`cd "@abs_top_srcdir@" > /dev/null; pwd`"
+abs_top_builddir="`cd "@abs_top_builddir@" > /dev/null; pwd`"
+
+export GUILE_LOAD_COMPILED_PATH="$abs_top_builddir${GUILE_LOAD_COMPILED_PATH:+:}$GUILE_LOAD_COMPILED_PATH"
+export GUILE_LOAD_PATH="$abs_top_builddir:$abs_top_srcdir${GUILE_LOAD_PATH:+:}:$GUILE_LOAD_PATH"
+export PATH="$abs_top_builddir/scripts:$PATH"
+
+exec "$@"
diff --git a/scripts/shroud.in b/scripts/shroud.in
new file mode 100644
index 0000000..f464c7f
--- /dev/null
+++ b/scripts/shroud.in
@@ -0,0 +1,7 @@
+#!@GUILE@ --no-auto-compile
+-*- mode: scheme -*-
+!#
+
+(use-modules (shroud ui))
+
+(apply shroud-main (cdr (command-line)))
diff --git a/shroud/config.scm b/shroud/config.scm
new file mode 100644
index 0000000..c83bdfe
--- /dev/null
+++ b/shroud/config.scm
@@ -0,0 +1,27 @@
+;;; Shroud
+;;; Copyright © 2015 David Thompson <davet@gnu.org>
+;;;
+;;; Shroud 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.
+;;;
+;;; Shroud 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 Shroud.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (shroud config)
+  #:export (%shroud-version
+            %shroud-gpg-binary
+            %shroud-database-file
+            %shroud-user-id))
+
+(define %shroud-version "0.1")
+(define %shroud-gpg-binary "gpg")
+(define %shroud-database-file
+  (string-append (getenv "HOME") "/.shroud-db"))
+(define %shroud-user-id #f)
diff --git a/shroud/secret.scm b/shroud/secret.scm
new file mode 100644
index 0000000..f9f499a
--- /dev/null
+++ b/shroud/secret.scm
@@ -0,0 +1,56 @@
+;;; Shroud
+;;; Copyright © 2015 David Thompson <davet@gnu.org>
+;;;
+;;; Shroud 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.
+;;;
+;;; Shroud 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 Shroud.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (shroud secret)
+  #:use-module (ice-9 match)
+  #:use-module (srfi srfi-9)
+  #:export (make-secret
+            secret?
+            secret-id
+            secret-content
+            alist->secret
+            secret->alist
+            load-secrets
+            save-secrets))
+
+(define-record-type <secret>
+  (make-secret id content)
+  secret?
+  (id      secret-id)
+  (content secret-content))
+
+(define (alist->secret alist)
+  "Convert ALIST into a <secret> record."
+  (make-secret (assq-ref alist 'id) (assq-ref alist 'content)))
+
+(define (secret->alist secret)
+  "Convert SECRET into an alist."
+  (match secret
+    (($ <secret> id content)
+     `((id . ,id)
+       (content . ,content)))))
+
+(define (load-secrets file)
+  "Load secrets from FILE, or return '() if FILE does not exist."
+  (if (file-exists? file)
+      (map alist->secret (call-with-input-file file read))
+      '()))
+
+(define (save-secrets secrets file)
+  "Write SECRETS to FILE."
+  (call-with-output-file file
+    (lambda (port)
+      (write (map secret->alist secrets) port))))
diff --git a/shroud/ui.scm b/shroud/ui.scm
new file mode 100644
index 0000000..cbc0683
--- /dev/null
+++ b/shroud/ui.scm
@@ -0,0 +1,147 @@
+;;; Shroud
+;;; Copyright © 2015 David Thompson <davet@gnu.org>
+;;;
+;;; Shroud 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.
+;;;
+;;; Shroud 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 Shroud.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (shroud ui)
+  #:use-module (ice-9 format)
+  #:use-module (ice-9 match)
+  #:use-module (srfi srfi-37)
+  #:use-module (shroud config)
+  #:use-module (shroud secret)
+  #:export (program-name
+            show-version-and-exit
+            leave
+            make-user-module
+            load*
+            shroud-main))
+
+(define program-name (make-parameter "shroud"))
+
+(define %commands
+  '("add" "show" "list-all" "remove" "clear"))
+
+(define (show-help)
+  (format #t "Usage: shroud COMMAND ARGS...
+Run COMMAND with ARGS.~%~%")
+  (format #t "COMMAND may be one of the sub-commands listed below:~%~%")
+  (format #t "~{   ~a~%~}" %commands))
+
+(define (show-usage)
+  (format #t "Try `shroud --help' for more information.~%")
+  (exit 1))
+
+(define (show-version-and-exit)
+  (format #t "~a ~a
+Copyright (C) 2015 David Thompson <davet@gnu.org>
+License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
+This is free software: you are free to change and redistribute it.
+There is NO WARRANTY, to the extent permitted by law.~%"
+          (program-name) %shroud-version)
+  (exit 0))
+
+(define (leave format-string . args)
+  "Display error message and exist."
+  (apply format (current-error-port) format-string args)
+  (newline)
+  (exit 1))
+
+(define (make-user-module modules)
+  "Return a new user module with the additional MODULES loaded."
+  ;; Module in which the machine description file is loaded.
+  (let ((module (make-fresh-user-module)))
+    (for-each (lambda (iface)
+                (module-use! module (resolve-interface iface)))
+              modules)
+    module))
+
+(define (report-load-error file args)
+  "Report the failure to load FILE, a user-provided Scheme file, and exit.
+ARGS is the list of arguments received by the 'throw' handler."
+  (match args
+    (('system-error . _)
+     (let ((err (system-error-errno args)))
+       (leave "failed to load '~a': ~a~%" file (strerror err))))
+    (('syntax-error proc message properties form . rest)
+     (let ((file (assq-ref properties 'filename))
+           (line (assq-ref properties 'line))
+           (col  (assq-ref properties 'column)))
+       (format (current-error-port) "~a:~a:~a: error: ~a~%"
+               file (and line (1+ line)) col message))
+     (exit 1))
+    ((error args ...)
+     (format (current-error-port) "failed to load '~a':~%" file)
+     (apply display-error #f (current-error-port) args)
+     (exit 1))))
+
+(define (load* file user-module)
+  "Load the user provided Scheme source code FILE."
+  (catch #t
+    (lambda ()
+      (set! %fresh-auto-compile #t)
+
+      (save-module-excursion
+       (lambda ()
+         (set-current-module user-module)
+         (primitive-load file))))
+    (lambda args
+      (report-load-error file args))))
+
+(define %default-config
+  `((database-file . ,(string-append (getenv "HOME") "/.shroud-db"))
+    (gpg-binary    . "gpg")))
+
+(define (load-config)
+  "Load and evaluate user configuration file."
+  (append (load* (string-append (getenv "HOME") "/.shroud")
+                 (make-user-module '((shroud config))))
+          %default-config))
+
+(define (command-proc command)
+  "Return the procedure for COMMAND."
+  (let* ((module
+             (catch 'misc-error
+               (lambda ()
+                 (resolve-interface `(shroud ui ,command)))
+               (lambda -
+                 (format (current-error-port) "~a: invalid subcommand~%" command)
+                 (show-usage)))))
+    (module-ref module (symbol-append 'shroud- command))))
+
+(define (option? str)
+  "Return #t if STR is an option string."
+  (string-prefix? "-" str))
+
+(define (make-program-name command)
+  "Return a program name string for COMMAND."
+  (string-append "shroud " (symbol->string command)))
+
+(define (shroud-main . args)
+  (match args
+    (() (show-usage))
+    ((or ("-h") ("--help"))
+     (show-help))
+    (("--version")
+     (show-version-and-exit))
+    (((? option? opt) _ ...)
+     (format (current-error-port) "shroud: unrecognized option '~a'~%" opt))
+    (((= string->symbol command) . args)
+     (let* ((config  (load-config))
+            (db-file (assq-ref config 'database-file))
+            (db      (load-secrets db-file))
+            (proc    (command-proc command))
+            (result  (parameterize ((program-name (make-program-name command)))
+                       (apply proc config db args))))
+       (unless (eq? db result)
+         (save-secrets result db-file))))))
diff --git a/shroud/utils.scm b/shroud/utils.scm
new file mode 100644
index 0000000..a0714af
--- /dev/null
+++ b/shroud/utils.scm
@@ -0,0 +1,23 @@
+;;; Shroud
+;;; Copyright © 2015 David Thompson <davet@gnu.org>
+;;;
+;;; Shroud 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.
+;;;
+;;; Shroud 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 Shroud.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (shroud utils)
+  #:use-module (ice-9 match)
+  #:use-module (ice-9 popen)
+  #:export ())
+
+;; TODO: Add call-with-encrypted-output-file and
+;; call-with-decrypted-input-file.