#!/usr/bin/ruby
+# password store management tool
+
+# Copyright (c) 2008 Peter Palfrader <peter@palfrader.org>
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
require 'optparse'
require 'thread'
+require 'tempfile'
+require 'yaml'
Thread.abort_on_exception = true
GNUPG = "/usr/bin/gpg"
$program_name = File.basename($0, '.*')
+$editor = ENV['EDITOR']
+if $editor == nil
+ %w{/usr/bin/sensible-editor /usr/bin/editor /usr/bin/vi}.each do |editor|
+ if FileTest.executable?(editor)
+ $editor = editor
+ break
+ end
+ end
+end
class GnuPG
@@my_keys = nil
+ @@my_fprs = nil
+ @@keyid_fpr_mapping = {}
def GnuPG.readwrite3(intxt, infd, stdoutfd, stderrfd, statusfd)
outtxt, stderrtxt, statustxt = ''
return outtxt, stderrtxt, statustxt
end
- def GnuPG.gpgcall(intxt, args)
+ def GnuPG.gpgcall(intxt, args, require_success = false)
inR, inW = IO.pipe
outR, outW = IO.pipe
errR, errW = IO.pipe
errW.close
statW.close
(outtxt, stderrtxt, statustxt) = readwrite3(intxt, inW, outR, errR, statR);
- Process.wait pid
- return outtxt, stderrtxt, statustxt
+ wpid, status = Process.waitpid2 pid
+ throw "Unexpected pid: #{pid} vs #{wpid}" unless pid == wpid
+ throw "Process has not exited!?" unless status.exited?
+ throw "gpg call did not exit sucessfully" if (require_success and status.exitstatus != 0)
+ return outtxt, stderrtxt, statustxt, status.exitstatus
end
def GnuPG.init_keys()
return if @@my_keys
- (outtxt, stderrtxt, statustxt) = GnuPG.gpgcall('', %w{--fast-list-mode --with-colons --list-secret-keys})
+ (outtxt, stderrtxt, statustxt) = GnuPG.gpgcall('', %w{--fast-list-mode --with-colons --with-fingerprint --list-secret-keys}, true)
@@my_keys = []
+ @@my_fprs = []
outtxt.split("\n").each do |line|
parts = line.split(':')
if (parts[0] == "ssb" or parts[0] == "sec")
@@my_keys.push parts[4]
+ elsif (parts[0] == "fpr")
+ @@my_fprs.push parts[9]
end
end
end
-
+ # This is for my private keys, so we can tell if a file is encrypted to us
def GnuPG.get_my_keys()
init_keys
@@my_keys
end
+ # And this is for my private keys also, so we can tell if we are encrypting to ourselves
+ def GnuPG.get_my_fprs()
+ init_keys
+ @@my_fprs
+ end
+
+ # This maps public keyids to fingerprints, so we can figure
+ # out if a file that is encrypted to a bunch of keys is
+ # encrypted to the fingerprints it should be encrypted to
+ def GnuPG.get_fpr_from_keyid(keyid)
+ fpr = @@keyid_fpr_mapping[keyid]
+ # this can be null, if we tried to find the fpr but failed to find the key in our keyring
+ unless fpr
+ STDERR.puts "Warning: No key found for keyid #{keyid}"
+ end
+ return fpr
+ end
+ def GnuPG.get_fprs_from_keyids(keyids)
+ learn_fingerprints_from_keyids(keyids)
+ return keyids.collect{ |k| get_fpr_from_keyid(k) or "unknown" }
+ end
+
+ # this is to load the keys we will soon be asking about into
+ # our keyid-fpr-mapping hash
+ def GnuPG.learn_fingerprints_from_keyids(keyids)
+ need_to_learn = keyids.reject{ |k| @@keyid_fpr_mapping.has_key?(k) }
+ if need_to_learn.size > 0
+ # we can't use --fast-list-mode here because GnuPG is broken
+ # and does not show elmo's fingerprint in a call like
+ # gpg --with-colons --fast-list-mode --with-fingerprint --list-key D7C3F131AB2A91F5
+ args = %w{--with-colons --with-fingerprint --list-keys}
+ args.concat need_to_learn
+ (outtxt, stderrtxt, statustxt) = GnuPG.gpgcall('', args, true)
+
+ pub = nil
+ fpr = nil
+ outtxt.split("\n").each do |line|
+ parts = line.split(':')
+ if (parts[0] == "pub")
+ pub = parts[4]
+ elsif (parts[0] == "fpr")
+ fpr = parts[9]
+ @@keyid_fpr_mapping[pub] = fpr
+ elsif (parts[0] == "sub")
+ @@keyid_fpr_mapping[parts[4]] = fpr
+ end
+ end
+ end
+ need_to_learn.reject{ |k| @@keyid_fpr_mapping.has_key?(k) }.each { |k| @@keyid_fpr_mapping[k] = nil }
+ end
end
-class EncryptedFile
- attr_reader :readable, :encrypted
+def read_input(query, default_yes=true)
+ if default_yes
+ append = '[Y/n]'
+ else
+ append = '[y/N]'
+ end
- def initialize(filename)
- content = File.read(filename)
- (outtxt, stderrtxt, statustxt) = GnuPG.gpgcall(content, %w{--with-colons --no-default-keyring --secret-keyring=/dev/null --keyring=/dev/null})
- @encrypted = !(statustxt =~ /\[GNUPG:\] NODATA/)
- if @encrypted
- @readers = EncryptedFile.list_readers(statustxt)
- @readable = EncryptedFile.determine_readable(@readers)
+ while true
+ print "#{query} #{append} "
+ i = STDIN.readline.chomp.downcase
+ if i==""
+ return default_yes
+ elsif i=="y"
+ return true
+ elsif i=="n"
+ return false
end
end
+end
+
+class GroupConfig
+ def initialize
+ parse_file
+ expand_groups
+ end
+
+ def verify(content)
+ begin
+ f = File.open(ENV['HOME']+'/.pws-trusted-users')
+ rescue Exception => e
+ STDERR.puts e
+ exit(1)
+ end
+
+ trusted = []
+ f.readlines.each do |line|
+ line.chomp!
+ next if line =~ /^$/
+ next if line =~ /^#/
+
+ trusted.push line
+ end
+
+ (outtxt, stderrtxt, statustxt, exitstatus) = GnuPG.gpgcall(content, %w{}, true)
+ goodsig = false
+ validsig = nil
+ statustxt.split("\n").each do |line|
+ if m = /^\[GNUPG:\] GOODSIG/.match(line)
+ goodsig = true
+ elsif m = /^\[GNUPG:\] VALIDSIG \S+ \S+ \S+ \S+ \S+ \S+ \S+ \S+ \S+ ([0-9A-F]+)/.match(line)
+ validsig = m[1]
+ end
+ end
+
+ if not goodsig
+ STDERR.puts ".users file is not signed properly"
+ exit(1)
+ end
+
+ if not trusted.include?(validsig)
+ STDERR.puts ".users file is signed by #{validsig} which is not in ~/.pws-trusted-users"
+ exit(1)
+ end
+
+ return outtxt
+ end
+
+ def parse_file
+ begin
+ f = File.open('.users')
+ rescue Exception => e
+ STDERR.puts e
+ exit(1)
+ end
+
+ users = f.read
+ f.close
+
+ users = verify(users)
+
+ @users = {}
+ @groups = {}
+
+ lno = 0
+ users.split("\n").each do |line|
+ lno = lno+1
+ next if line =~ /^$/
+ next if line =~ /^#/
+ if (m = /^([a-zA-Z0-9-]+)\s*=\s*([0-9A-Fa-f]{40})\s*$/.match line)
+ user = m[1]
+ fpr = m[2]
+ if @users.has_key?(user)
+ STDERR.puts "User #{user} redefined at line #{lno}!"
+ exit(1)
+ end
+ @users[user] = fpr
+ elsif (m = /^(@[a-zA-Z0-9-]+)\s*=\s*(.*)$/.match line)
+ group = m[1]
+ members = m[2].strip
+ if @groups.has_key?(group)
+ STDERR.puts "Group #{group} redefined at line #{lno}!"
+ exit(1)
+ end
+ members = members.split(/[\t ,]+/)
+ @groups[group] = { "members" => members }
+ end
+ end
+ end
+
+ def is_group(name)
+ return (name =~ /^@/)
+ end
+ def check_exists(x, whence, fatal=true)
+ ok=true
+ if is_group(x)
+ ok=false unless (@groups.has_key?(x))
+ else
+ ok=false unless @users.has_key?(x)
+ end
+ unless ok
+ STDERR.puts( (fatal ? "Error: " : "Warning: ") + "#{whence} contains unknown member #{x}")
+ exit(1) if fatal
+ end
+ return ok
+ end
+ def expand_groups
+ @groups.each_pair do |groupname, group|
+ group['members'].each do |member|
+ check_exists(member, "Group #{groupname}")
+ end
+ group['members_to_do'] = group['members'].clone
+ end
+
+ while true
+ had_progress = false
+ all_expanded = true
+ @groups.each_pair do |groupname, group|
+ group['keys'] = [] unless group['keys']
+
+ still_contains_groups = false
+ group['members_to_do'].each do |member|
+ if is_group(member)
+ if @groups[member]['members_to_do'].size == 0
+ group['keys'].concat @groups[member]['keys']
+ group['members_to_do'].delete(member)
+ had_progress = true
+ else
+ still_contains_groups = true
+ end
+ else
+ group['keys'].push @users[member]
+ group['members_to_do'].delete(member)
+ had_progress = true
+ end
+ end
+ all_expanded = false if still_contains_groups
+ end
+ break if all_expanded
+ unless had_progress
+ cyclic_groups = @groups.keys.reject{|name| @groups[name]['members_to_do'].size == 0}.join(", ")
+ STDERR.puts "Cyclic group memberships in #{cyclic_groups}?"
+ exit(1)
+ end
+ end
+ end
+
+ def expand_targets(targets)
+ fprs = []
+ ok = true
+ targets.each do |t|
+ unless check_exists(t, "access line", false)
+ ok = false
+ next
+ end
+ if is_group(t)
+ fprs.concat @groups[t]['keys']
+ else
+ fprs.push @users[t]
+ end
+ end
+ return ok, fprs.uniq
+ end
+end
+
+class EncryptedFile
+ attr_reader :accessible, :encrypted, :readable, :readers
def EncryptedFile.determine_readable(readers)
GnuPG.get_my_keys.each do |keyid|
end
return readers
end
+
+ def EncryptedFile.targets(text)
+ metaline = text.split("\n").first
+ m = /^access: (.*)/.match metaline
+ return [] unless m
+ return m[1].strip.split(/[\t ,]+/)
+ end
+
+
+ def initialize(filename, new=false)
+ @groupconfig = GroupConfig.new
+ @new = new
+ if @new
+ @readers = []
+ end
+
+ @filename = filename
+ unless FileTest.readable?(filename)
+ @accessible = false
+ return
+ end
+ @accessible = true
+ @encrypted_content = File.read(filename)
+ (outtxt, stderrtxt, statustxt) = GnuPG.gpgcall(@encrypted_content, %w{--with-colons --no-default-keyring --secret-keyring=/dev/null --keyring=/dev/null})
+ @encrypted = !(statustxt =~ /\[GNUPG:\] NODATA/)
+ if @encrypted
+ @readers = EncryptedFile.list_readers(statustxt)
+ @readable = EncryptedFile.determine_readable(@readers)
+ end
+ end
+
+ def decrypt
+ (outtxt, stderrtxt, statustxt, exitstatus) = GnuPG.gpgcall(@encrypted_content, %w{--decrypt})
+ if !@new and exitstatus != 0
+ proceed = read_input("Warning: gpg returned non-zero exit status #{exitstatus} when decrypting #{@filename}. Proceed?", false)
+ exit(0) unless proceed
+ elsif !@new and outtxt.length == 0
+ proceed = read_input("Warning: #{@filename} decrypted to an empty file. Proceed?")
+ exit(0) unless proceed
+ end
+
+ return outtxt
+ end
+
+ def encrypt(content, recipients)
+ args = recipients.collect{ |r| "--recipient=#{r}"}
+ args.push "--trust-model=always"
+ args.push "--encrypt"
+ (outtxt, stderrtxt, statustxt, exitstatus) = GnuPG.gpgcall(content, args)
+
+ invalid = []
+ statustxt.split("\n").each do |line|
+ m = /^\[GNUPG:\] INV_RECP \S+ ([0-9A-F]+)/.match line
+ next unless m
+ invalid.push m[1]
+ end
+ if invalid.size > 0
+ again = read_input("Warning: the following recipients are invalid: #{invalid.join(", ")}. Try again (or proceed)?")
+ return false if again
+ end
+ if outtxt.length == 0
+ tryagain = read_input("Error: #{@filename} encrypted to an empty file. Edit again (or exit)?")
+ return false if tryagain
+ exit(0)
+ end
+ if exitstatus != 0
+ proceed = read_input("Warning: gpg returned non-zero exit status #{exitstatus} when encrypting #{@filename}. Said:\n#{stderrtxt}\n#{statustxt}\n\nProceed (or try again)?")
+ return false unless proceed
+ end
+
+ return true, outtxt
+ end
+
+
+ def determine_encryption_targets(content)
+ targets = EncryptedFile.targets(content)
+ if targets.size == 0
+ tryagain = read_input("Warning: Did not find targets to encrypt to in header. Try again (or exit)?", true)
+ return false if tryagain
+ exit(0)
+ end
+
+ ok, expanded = @groupconfig.expand_targets(targets)
+ if (expanded.size == 0)
+ tryagain = read_input("Errors in access header. Edit again (or exit)?", true)
+ return false if tryagain
+ exit(0)
+ elsif (not ok)
+ tryagain = read_input("Warnings in access header. Edit again (or continue)?", true)
+ return false if tryagain
+ end
+
+ to_me = false
+ GnuPG.get_my_fprs.each do |fpr|
+ if expanded.include?(fpr)
+ to_me = true
+ break
+ end
+ end
+ unless to_me
+ tryagain = read_input("File is not being encrypted to you. Edit again (or continue)?", true)
+ return false if tryagain
+ end
+
+ return true, expanded
+ end
+
+ def write_back(content, targets)
+ ok, encrypted = encrypt(content, targets)
+ return false unless ok
+
+ File.open(@filename,"w").write(encrypted)
+ return true
+ end
end
class Ls
end
puts "#{dirname}:"
Dir.chdir(dirname) do
+ unless FileTest.exists?(".users")
+ STDERR.puts "The .users file does not exists here. This is not a password store, is it?"
+ exit(1)
+ end
dir.sort.each do |filename|
next if (filename =~ /^\./) and not (@all >= 3)
stat = File::Stat.new(filename)
puts "(other) #{filename}" if (@all >= 2)
else
f = EncryptedFile.new(filename)
- if f.encrypted
- if f.readable
- puts "(ok) #{filename}"
- else
- puts "(locked) #{filename}" if (@all >= 1)
- end
- else
+ if !f.accessible
+ puts "(!perm) #{filename}"
+ elsif !f.encrypted
puts "(file) #{filename}" if (@all >= 2)
+ elsif f.readable
+ puts "(ok) #{filename}"
+ else
+ puts "(locked) #{filename}" if (@all >= 1)
end
end
end
end
end
-case ARGV.shift
- when 'ls': Ls.new
- else
- STDERR.puts "What!?"
+class Ed
+ def help(parser, code=0, io=STDOUT)
+ io.puts "Usage: #{$program_name} ed <filename>"
+ io.puts parser.summarize
+ io.puts "Decrypts the file, spawns an editor, and encrypts it again"
+ exit(code)
+ end
+
+ def edit(filename)
+ encrypted_file = EncryptedFile.new(filename, @new)
+ if !@new and !encrypted_file.readable && !@force
+ STDERR.puts "#{filename} is probably not readable"
+ exit(1)
+ end
+
+ encrypted_to = GnuPG.get_fprs_from_keyids(encrypted_file.readers).sort
+
+ content = encrypted_file.decrypt
+ original_content = content
+ while true
+ oldsize = content.length
+ tempfile = Tempfile.open('pws')
+ tempfile.puts content
+ tempfile.flush
+ system($editor, tempfile.path)
+ status = $?
+ throw "Process has not exited!?" unless status.exited?
+ unless status.exitstatus == 0
+ proceed = read_input("Warning: Editor did not exit successfully (exit code #{status.exitstatus}. Proceed?")
+ exit(0) unless proceed
+ end
+ tempfile.seek(0, IO::SEEK_SET)
+ content = tempfile.read
+
+ # zero the file
+ newsize = content.length
+ tempfile.seek(0, IO::SEEK_SET)
+ clearsize = (newsize > oldsize) ? newsize : oldsize
+ tempfile.print "\0"*clearsize
+ tempfile.fsync
+ tempfile.close(true)
+
+ if content.length == 0
+ proceed = read_input("Warning: Content is now empty. Proceed?")
+ exit(0) unless proceed
+ end
+
+ ok, targets = encrypted_file.determine_encryption_targets(content)
+ next unless ok
+
+ if (original_content == content)
+ if (targets.sort == encrypted_to)
+ proceed = read_input("Nothing changed. Re-encrypt anyway?", false)
+ exit(0) unless proceed
+ else
+ STDERR.puts("Info: Content not changed but re-encrypting anyway because the list of keys changed")
+ end
+ end
+
+ success = encrypted_file.write_back(content, targets)
+ break if success
+ end
+ end
+
+ def initialize()
+ ARGV.options do |opts|
+ opts.on_tail("-h", "--help" , "Display this help screen") { help(opts) }
+ opts.on_tail("-n", "--new" , "Edit new file") { |@new| }
+ opts.on_tail("-f", "--force" , "Spawn an editor even if the file is probably not readable") { |@force| }
+ opts.parse!
+ end
+ help(ARGV.options, 1, STDERR) if ARGV.length != 1
+ filename = ARGV.shift
+
+ if @new
+ if FileTest.exists?(filename)
+ STDERR.puts "#{filename} does exist"
+ exit(1)
+ end
+ else
+ if !FileTest.exists?(filename)
+ STDERR.puts "#{filename} does not exist"
+ exit(1)
+ elsif !FileTest.file?(filename)
+ STDERR.puts "#{filename} is not a regular file"
+ exit(1)
+ elsif !FileTest.readable?(filename)
+ STDERR.puts "#{filename} is not accessible (unix perms)"
+ exit(1)
+ end
+ end
+
+ dirname = File.dirname(filename)
+ basename = File.basename(filename)
+ Dir.chdir(dirname) {
+ edit(basename)
+ }
+ end
+end
+
+
+def help(code=0, io=STDOUT)
+ io.puts "Usage: #{$program_name} ed"
+ io.puts " #{$program_name} ls"
+ io.puts " #{$program_name} help"
+ io.puts "Call #{$program_name} <command> --help for additional options/parameters"
+ exit(code)
end
+
+def parse_command
+ case ARGV.shift
+ when 'ls': Ls.new
+ when 'ed': Ed.new
+ when 'help':
+ case ARGV.length
+ when 0: help
+ when 1:
+ ARGV.push "--help"
+ parse_command
+ else help(1, STDERR)
+ end
+ else
+ help(1, STDERR)
+ end
+end
+
+parse_command
+
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projects / pwstore / blobdiff