From 5a86dfa7c35aeb076271f2c3fcbaeba9fb221d66 Mon Sep 17 00:00:00 2001
From: Louise Crow <louise.crow@gmail.com>
Date: Fri, 23 Oct 2015 18:39:56 +0100
Subject: [PATCH 1/6] Set file encoding to ASCII-8BIT

---
 contrib/wmf.rb                 | 4 ++--
 lib/mapi.rb                    | 2 +-
 lib/mapi/base.rb               | 2 +-
 lib/mapi/convert.rb            | 2 +-
 lib/mapi/convert/contact.rb    | 2 +-
 lib/mapi/convert/note-mime.rb  | 2 +-
 lib/mapi/convert/note-tmail.rb | 2 +-
 lib/mapi/mime.rb               | 2 +-
 lib/mapi/msg.rb                | 2 +-
 lib/mapi/orderedhash.rb        | 2 +-
 lib/mapi/property_set.rb       | 2 +-
 lib/mapi/pst.rb                | 2 +-
 lib/mapi/rtf.rb                | 2 +-
 lib/mapi/types.rb              | 2 +-
 lib/mapi/version.rb            | 2 +-
 test/test_convert_contact.rb   | 2 +-
 test/test_convert_note.rb      | 2 +-
 test/test_mime.rb              | 2 +-
 test/test_msg.rb               | 2 +-
 test/test_property_set.rb      | 2 +-
 test/test_types.rb             | 2 +-
 21 files changed, 22 insertions(+), 22 deletions(-)

diff --git a/contrib/wmf.rb b/contrib/wmf.rb
index f662dc4..899c0da 100644
--- a/contrib/wmf.rb
+++ b/contrib/wmf.rb
@@ -1,4 +1,4 @@
-# -*- encoding : utf-8 -*-
+# -*- encoding : ASCII-8BIT -*-
 
 # this file will be used later to enhance the msg conversion.
 
@@ -52,7 +52,7 @@ def wmf_getdimensions wmf_data
 \b\f2\fs20{\object\objemb{\*\objclass PBrush}\objw1320\objh1274{\*\objdata
 01050000 <- looks like standard header
 02000000 <- not sure
-07000000 <- this means length of following is 7. 
+07000000 <- this means length of following is 7.
 50427275736800 <- Pbrush\000 in hex
 00000000 <- ?
 00000000 <- ?
diff --git a/lib/mapi.rb b/lib/mapi.rb
index 3dfd441..af9b364 100644
--- a/lib/mapi.rb
+++ b/lib/mapi.rb
@@ -1,4 +1,4 @@
-# -*- encoding : utf-8 -*-
+# -*- encoding : ASCII-8BIT -*-
 require 'mapi/version'
 require 'mapi/base'
 require 'mapi/types'
diff --git a/lib/mapi/base.rb b/lib/mapi/base.rb
index 91cf190..73e1920 100644
--- a/lib/mapi/base.rb
+++ b/lib/mapi/base.rb
@@ -1,4 +1,4 @@
-# -*- encoding : utf-8 -*-
+# -*- encoding : ASCII-8BIT -*-
 module Mapi
 	#
 	# Mapi::Item is the base class used for all mapi objects, and is purely a
diff --git a/lib/mapi/convert.rb b/lib/mapi/convert.rb
index cc7e18a..2e86e67 100644
--- a/lib/mapi/convert.rb
+++ b/lib/mapi/convert.rb
@@ -1,4 +1,4 @@
-# -*- encoding : utf-8 -*-
+# -*- encoding : ASCII-8BIT -*-
 # we have two different "backends" for note conversion. we're sticking with
 # the current (home grown) mime one until the tmail version is suitably
 # polished.
diff --git a/lib/mapi/convert/contact.rb b/lib/mapi/convert/contact.rb
index 6b02e21..1a2297b 100644
--- a/lib/mapi/convert/contact.rb
+++ b/lib/mapi/convert/contact.rb
@@ -1,4 +1,4 @@
-# -*- encoding : utf-8 -*-
+# -*- encoding : ASCII-8BIT -*-
 require 'rubygems'
 require 'vpim/vcard'
 
diff --git a/lib/mapi/convert/note-mime.rb b/lib/mapi/convert/note-mime.rb
index cd326d5..2156e8f 100644
--- a/lib/mapi/convert/note-mime.rb
+++ b/lib/mapi/convert/note-mime.rb
@@ -1,4 +1,4 @@
-# -*- encoding : utf-8 -*-
+# -*- encoding : ASCII-8BIT -*-
 require 'base64'
 require 'mapi/mime'
 require 'time'
diff --git a/lib/mapi/convert/note-tmail.rb b/lib/mapi/convert/note-tmail.rb
index 1688f97..b2930a4 100644
--- a/lib/mapi/convert/note-tmail.rb
+++ b/lib/mapi/convert/note-tmail.rb
@@ -1,4 +1,4 @@
-# -*- encoding : utf-8 -*-
+# -*- encoding : ASCII-8BIT -*-
 require 'rubygems'
 require 'tmail'
 
diff --git a/lib/mapi/mime.rb b/lib/mapi/mime.rb
index b278ff0..7240489 100644
--- a/lib/mapi/mime.rb
+++ b/lib/mapi/mime.rb
@@ -1,4 +1,4 @@
-# -*- encoding : utf-8 -*-
+# -*- encoding : ASCII-8BIT -*-
 #
 # = Introduction
 #
diff --git a/lib/mapi/msg.rb b/lib/mapi/msg.rb
index 8d8b286..c805ea4 100644
--- a/lib/mapi/msg.rb
+++ b/lib/mapi/msg.rb
@@ -1,4 +1,4 @@
-# -*- encoding : utf-8 -*-
+# -*- encoding : ASCII-8BIT -*-
 require 'ole/storage'
 require 'mapi'
 require 'mapi/rtf'
diff --git a/lib/mapi/orderedhash.rb b/lib/mapi/orderedhash.rb
index 34b9777..dc33741 100644
--- a/lib/mapi/orderedhash.rb
+++ b/lib/mapi/orderedhash.rb
@@ -1,4 +1,4 @@
-# -*- encoding : utf-8 -*-
+# -*- encoding : ASCII-8BIT -*-
 # = OrderedHash
 #
 # == Version
diff --git a/lib/mapi/property_set.rb b/lib/mapi/property_set.rb
index 5e8abe9..1e6bf79 100644
--- a/lib/mapi/property_set.rb
+++ b/lib/mapi/property_set.rb
@@ -1,4 +1,4 @@
-# -*- encoding : utf-8 -*-
+# -*- encoding : ASCII-8BIT -*-
 require 'yaml'
 require 'mapi/types'
 require 'mapi/rtf'
diff --git a/lib/mapi/pst.rb b/lib/mapi/pst.rb
index 57cd2e1..ce6bfda 100644
--- a/lib/mapi/pst.rb
+++ b/lib/mapi/pst.rb
@@ -1,4 +1,4 @@
-# -*- encoding : utf-8 -*-
+# -*- encoding : ASCII-8BIT -*-
 #
 # = Introduction
 #
diff --git a/lib/mapi/rtf.rb b/lib/mapi/rtf.rb
index 8651a71..8a34467 100644
--- a/lib/mapi/rtf.rb
+++ b/lib/mapi/rtf.rb
@@ -1,4 +1,4 @@
-# -*- encoding : utf-8 -*-
+# -*- encoding : ASCII-8BIT -*-
 require 'stringio'
 require 'strscan'
 
diff --git a/lib/mapi/types.rb b/lib/mapi/types.rb
index c802682..cbf6092 100644
--- a/lib/mapi/types.rb
+++ b/lib/mapi/types.rb
@@ -1,4 +1,4 @@
-# -*- encoding : utf-8 -*-
+# -*- encoding : ASCII-8BIT -*-
 require 'rubygems'
 require 'ole/types'
 
diff --git a/lib/mapi/version.rb b/lib/mapi/version.rb
index 689b454..e2c4f06 100644
--- a/lib/mapi/version.rb
+++ b/lib/mapi/version.rb
@@ -1,4 +1,4 @@
-# -*- encoding : utf-8 -*-
+# -*- encoding : ASCII-8BIT -*-
 module Mapi
 	VERSION = '1.5.2'
 end
diff --git a/test/test_convert_contact.rb b/test/test_convert_contact.rb
index b37c529..1466572 100644
--- a/test/test_convert_contact.rb
+++ b/test/test_convert_contact.rb
@@ -1,4 +1,4 @@
-# -*- encoding : utf-8 -*-
+# -*- encoding : ASCII-8BIT -*-
 require 'test/unit'
 
 $:.unshift File.dirname(__FILE__) + '/../lib'
diff --git a/test/test_convert_note.rb b/test/test_convert_note.rb
index 09c9981..8aabccb 100644
--- a/test/test_convert_note.rb
+++ b/test/test_convert_note.rb
@@ -1,4 +1,4 @@
-# -*- encoding : utf-8 -*-
+# -*- encoding : ASCII-8BIT -*-
 require 'test/unit'
 
 $:.unshift File.dirname(__FILE__) + '/../lib'
diff --git a/test/test_mime.rb b/test/test_mime.rb
index 124d428..e597d88 100644
--- a/test/test_mime.rb
+++ b/test/test_mime.rb
@@ -1,4 +1,4 @@
-# -*- encoding : utf-8 -*-
+# -*- encoding : ASCII-8BIT -*-
 #! /usr/bin/ruby -w
 
 $: << File.dirname(__FILE__) + '/../lib'
diff --git a/test/test_msg.rb b/test/test_msg.rb
index e5435bc..80e5beb 100644
--- a/test/test_msg.rb
+++ b/test/test_msg.rb
@@ -1,4 +1,4 @@
-# -*- encoding : utf-8 -*-
+# -*- encoding : ASCII-8BIT -*-
 #! /usr/bin/ruby
 
 TEST_DIR = File.dirname __FILE__
diff --git a/test/test_property_set.rb b/test/test_property_set.rb
index bd6b85b..a34451b 100644
--- a/test/test_property_set.rb
+++ b/test/test_property_set.rb
@@ -1,4 +1,4 @@
-# -*- encoding : utf-8 -*-
+# -*- encoding : ASCII-8BIT -*-
 require 'test/unit'
 
 $:.unshift File.dirname(__FILE__) + '/../lib'
diff --git a/test/test_types.rb b/test/test_types.rb
index fc9c94f..4353fcf 100644
--- a/test/test_types.rb
+++ b/test/test_types.rb
@@ -1,4 +1,4 @@
-# -*- encoding : utf-8 -*-
+# -*- encoding : ASCII-8BIT -*-
 require 'test/unit'
 
 $:.unshift File.dirname(__FILE__) + '/../lib'

From f9f928ed76c024b4bc3a08bc1a59beb62df36663 Mon Sep 17 00:00:00 2001
From: Louise Crow <louise.crow@gmail.com>
Date: Fri, 23 Oct 2015 18:41:58 +0100
Subject: [PATCH 2/6] Remove previous fix - see comments at
 https://github.com/aquasync/ruby-msg/pull/5#issuecomment-50475467

---
 lib/mapi/property_set.rb |  5 ----
 test/test_msg.rb         | 59 +++++++++++++++++++---------------------
 2 files changed, 28 insertions(+), 36 deletions(-)

diff --git a/lib/mapi/property_set.rb b/lib/mapi/property_set.rb
index 1e6bf79..d911b98 100644
--- a/lib/mapi/property_set.rb
+++ b/lib/mapi/property_set.rb
@@ -282,11 +282,6 @@ def body_html
 					end
 				end
 			end
-			if @body_html && @body_html.respond_to?(:encoding)
-				@body_html.force_encoding("utf-8")
-				@body_html = @body_html.valid_encoding? ? @body_html : @body_html.encode("utf-16le", :invalid => :replace, :replace => "").encode("utf-8")
-			end
-			@body_html
 		end
 	end
 end
diff --git a/test/test_msg.rb b/test/test_msg.rb
index 80e5beb..ed52f0e 100644
--- a/test/test_msg.rb
+++ b/test/test_msg.rb
@@ -9,39 +9,36 @@
 require 'mapi/convert'
 
 class TestMsg < Test::Unit::TestCase
-	def test_blammo
-		Mapi::Msg.open "#{TEST_DIR}/test_Blammo.msg" do |msg|
-			assert_equal '"TripleNickel" <TripleNickel@mapi32.net>', msg.from
-			assert_equal 'BlammoBlammo', msg.subject
-			assert_equal 0, msg.recipients.length
-			assert_equal 0, msg.attachments.length
-			# this is all properties
-			assert_equal 66, msg.properties.raw.length
-			# this is unique named properties
-			assert_equal 48, msg.properties.to_h.length
-			# test accessing the named property keys - same name but different namespace
-			assert_equal 'Yippee555', msg.props['Name4', Ole::Types::Clsid.parse('55555555-5555-5555-c000-000000000046')]
-			assert_equal 'Yippee666', msg.props['Name4', Ole::Types::Clsid.parse('66666666-6666-6666-c000-000000000046')]
-		end
-	end
+  def test_blammo
+    Mapi::Msg.open "#{TEST_DIR}/test_Blammo.msg" do |msg|
+      assert_equal '"TripleNickel" <TripleNickel@mapi32.net>', msg.from
+      assert_equal 'BlammoBlammo', msg.subject
+      assert_equal 0, msg.recipients.length
+      assert_equal 0, msg.attachments.length
+      # this is all properties
+      assert_equal 66, msg.properties.raw.length
+      # this is unique named properties
+      assert_equal 48, msg.properties.to_h.length
+      # test accessing the named property keys - same name but different namespace
+      assert_equal 'Yippee555', msg.props['Name4', Ole::Types::Clsid.parse('55555555-5555-5555-c000-000000000046')]
+      assert_equal 'Yippee666', msg.props['Name4', Ole::Types::Clsid.parse('66666666-6666-6666-c000-000000000046')]
+    end
+  end
 
 
-	def test_rtf_to_html_returns_valid_utf8
-		msg = Mapi::Msg.open "#{TEST_DIR}/multipart-with-html.msg" do |msg|
-			assert_equal 1, msg.recipients.length
-			assert_equal 3, msg.attachments.length
-			html_part = msg.to_mime.parts[0].parts[1].to_s
-			if html_part.respond_to?(:encoding)
-				assert_equal 'UTF-8', html_part.encoding.to_s
-				assert html_part.valid_encoding?
-			end
-		end
-	end
+  def test_rendered_string_is_valid_encoding
+    msg = Mapi::Msg.open "#{TEST_DIR}/multipart-with-html.msg" do |msg|
+      string_version = msg.to_mime.to_s
+      if string_version.respond_to?(:valid_encoding?)
+        assert_equal true, string_version.valid_encoding?
+      end
+    end
+  end
 
-	def test_embedded_msg_renders_as_string
-		msg = Mapi::Msg.open "#{TEST_DIR}/embedded.msg" do |msg|
-			assert_match "message/rfc822", msg.to_mime.to_s
-		end
-	end
+  def test_embedded_msg_renders_as_string
+    msg = Mapi::Msg.open "#{TEST_DIR}/embedded.msg" do |msg|
+      assert_match "message/rfc822", msg.to_mime.to_s
+    end
+  end
 end
 

From fac10c808fe73bfb1a38c1d63fa30a8cb0a92f82 Mon Sep 17 00:00:00 2001
From: Gareth Rees <gareth@garethrees.co.uk>
Date: Thu, 6 Oct 2016 16:34:16 +0100
Subject: [PATCH 3/6] Ruby 1.9+ compatible path in Rakefile

Rake was failing because PKG_NAME was not defined.
---
 Rakefile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Rakefile b/Rakefile
index f09cb7d..f2e659f 100644
--- a/Rakefile
+++ b/Rakefile
@@ -4,7 +4,8 @@ require 'rake/testtask'
 require 'rbconfig'
 require 'fileutils'
 
-spec = eval File.read('ruby-msg.gemspec')
+gemspec_file = File.expand_path(File.dirname(__FILE__) + '/ruby-msg.gemspec')
+spec = eval File.read(gemspec_file)
 
 task :default => [:test]
 

From fae72e547299ab1f8b23239a79f5a1d353426b40 Mon Sep 17 00:00:00 2001
From: Gareth Rees <gareth@garethrees.co.uk>
Date: Thu, 6 Oct 2016 16:49:46 +0100
Subject: [PATCH 4/6] Rescue from error when converting Mime to String

Rescue from Encoding::CompatibilityError when converting Mapi::Mime to a String.

In some situations the parts can legitimately be different encodings,
but cannot be concatenated given the encoding differences.

In this situation, force the encoding to ASCII-8BIT rather than
erroring.
---
 lib/mapi/mime.rb | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/lib/mapi/mime.rb b/lib/mapi/mime.rb
index 7240489..c8b007a 100644
--- a/lib/mapi/mime.rb
+++ b/lib/mapi/mime.rb
@@ -106,8 +106,17 @@ def to_s opts={}
   		opts = {:boundary_counter => 0}.merge opts
   		if multipart?
   			boundary = Mime.make_boundary opts[:boundary_counter] += 1, self
-  			@body = [preamble, parts.map { |part| "\r\n" + part.to_s(opts) + "\r\n" }, "--\r\n" + epilogue].
-  				flatten.join("\r\n--" + boundary)
+        begin
+          @body = [preamble, parts.map { |part| "\r\n" + part.to_s(opts) + "\r\n" }, "--\r\n" + epilogue].
+            flatten.join("\r\n--" + boundary)
+        rescue Encoding::CompatibilityError => e
+          if ''.respond_to?(:force_encoding)
+            @body = [preamble, parts.map { |part| "\r\n" + part.to_s(opts).force_encoding('ASCII-8BIT') + "\r\n" }, "--\r\n" + epilogue].
+              flatten.join("\r\n--" + boundary)
+          else
+            raise e
+          end
+        end
   			content_type, attrs = Mime.split_header @headers['Content-Type'][0]
   			attrs['boundary'] = boundary
   			@headers['Content-Type'] = [([content_type] + attrs.map { |key, val| %{#{key}="#{val}"} }).join('; ')]

From 2d09aaaf03f4248320b24c217a6bbea485c7264e Mon Sep 17 00:00:00 2001
From: Gareth Rees <gareth@garethrees.co.uk>
Date: Tue, 22 Sep 2020 17:00:54 +0100
Subject: [PATCH 5/6] Add spec for fae72e5
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Copy spec added in 43c8797 that was used to test variations on the fix
for falling back to ASCII encoding. We finally settled on fae72e5 as a
fix, but didn’t introduce the spec for some reason.
---
 test/small-business-rates-relief.msg | Bin 0 -> 30720 bytes
 test/test_msg.rb                     |   9 +++++++++
 2 files changed, 9 insertions(+)
 create mode 100644 test/small-business-rates-relief.msg

diff --git a/test/small-business-rates-relief.msg b/test/small-business-rates-relief.msg
new file mode 100644
index 0000000000000000000000000000000000000000..1de113005dca6ff7fcd05b5e824aad9acf11b891
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/test/test_msg.rb b/test/test_msg.rb
index ed52f0e..c1741b6 100644
--- a/test/test_msg.rb
+++ b/test/test_msg.rb
@@ -35,6 +35,15 @@ def test_rendered_string_is_valid_encoding
     end
   end
 
+  def test_multipart_rendered_string_is_valid_encoding
+    msg = Mapi::Msg.open "#{TEST_DIR}/small-business-rates-relief.msg" do |msg|
+      string_version = msg.to_mime.to_s
+      if string_version.respond_to?(:valid_encoding?)
+        assert_equal true, string_version.valid_encoding?
+      end
+    end
+  end
+
   def test_embedded_msg_renders_as_string
     msg = Mapi::Msg.open "#{TEST_DIR}/embedded.msg" do |msg|
       assert_match "message/rfc822", msg.to_mime.to_s

From a9272b2060637a9d24db490bc85fa3ea520d05d0 Mon Sep 17 00:00:00 2001
From: Gareth Rees <gareth@garethrees.co.uk>
Date: Tue, 22 Sep 2020 17:16:33 +0100
Subject: [PATCH 6/6] Fix another incompatible character encoding error
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

In fae72e5 we introduced a fallback for incompatible character
encodings, but that only covered the case where Mapi::Mime#is_multipart?
returns true.

This is a slight variation for the other branch of the conditional.

The error is being raised where we have a `@body` in a different
encoding to the default string encoding. In this case, just always force
the string to be the same encoding as `@body` so we don’t get an error.

This passes the spec for the particular file we’re seeing problems with,
but I’m not at all sure this is the right thing to do. Maybe we should
always treat anything in mapi as ASCII, and then force to UTF-8 for
display? [1]

Fixes https://github.com/mysociety/alaveteli/issues/5783

[1] https://github.com/aquasync/ruby-msg/issues/9#issuecomment-54589744
---
 lib/mapi/mime.rb                  |   2 +-
 test/28101-outlook-attachment.msg | Bin 0 -> 45056 bytes
 test/test_msg.rb                  |   9 +++++++++
 3 files changed, 10 insertions(+), 1 deletion(-)
 create mode 100644 test/28101-outlook-attachment.msg

diff --git a/lib/mapi/mime.rb b/lib/mapi/mime.rb
index c8b007a..2cdab98 100644
--- a/lib/mapi/mime.rb
+++ b/lib/mapi/mime.rb
@@ -126,7 +126,7 @@ def to_s opts={}
   		@headers.each do |key, vals|
   			vals.each { |val| str << "#{key}: #{val}\r\n" }
   		end
-  		str << "\r\n" + @body
+  		str.force_encoding(@body.encoding) << "\r\n" + @body
   	end
 
   	def self.split_header header
diff --git a/test/28101-outlook-attachment.msg b/test/28101-outlook-attachment.msg
new file mode 100644
index 0000000000000000000000000000000000000000..6ec6aa9b66f18b73dfd8a104947f39775940be21
GIT binary patch
literal 45056
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HcmV?d00001

diff --git a/test/test_msg.rb b/test/test_msg.rb
index c1741b6..67bc7d5 100644
--- a/test/test_msg.rb
+++ b/test/test_msg.rb
@@ -44,6 +44,15 @@ def test_multipart_rendered_string_is_valid_encoding
     end
   end
 
+  def test_non_multipart_rendered_string_is_valid_encoding
+    msg = Mapi::Msg.open "#{TEST_DIR}/28101-outlook-attachment.msg" do |msg|
+      string_version = msg.to_mime.to_s
+      if string_version.respond_to?(:valid_encoding?)
+        assert_equal true, string_version.valid_encoding?
+      end
+    end
+  end
+
   def test_embedded_msg_renders_as_string
     msg = Mapi::Msg.open "#{TEST_DIR}/embedded.msg" do |msg|
       assert_match "message/rfc822", msg.to_mime.to_s