Eliminate attachment corruption caused by line ending conversions

* Omit initial CRLF linefeed conversion since CRLF are required newline separators. We shouldn't need to convert bare CR or LF. Update our fixture emails to use CRLF throughout. Closes mikel#609. Fixes mikel#408. * Drop quoted-printable CRLF conversion. This was introduced to harmonize with Ruby's \n-based line endings. But this breaks Q-P encoding with binary data. It's not *meant* for binary data, but we don't yet take adequate measures to use base64 for these cases. Reverts mikel#496. Fixes mikel#1010. Closes mikel#1113
muhammadn · May 22, 2017 · 21222e1 · 21222e1
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diff --git a/CHANGELOG.rdoc b/CHANGELOG.rdoc
@@ -55,6 +55,7 @@ Bugs:
 * #1074 - Fix that the first address in a list is dropped when a subsequent address has non-US-ASCII characters. (domininik)
 * #1107 - Fix Address#display_name and other formatting flip-flopping between encoded and decoded forms depending on whether #encoded or #decoded was called last. (jeremy)
 * #1110 - Fix that Mail::Multibyte::Chars#initialize mutated its argument by calling force_encoding on it. (jeremy)
+* #1113 - Eliminate attachment corruption caused by CRLF conversion. (jeremy)
 
 == Version 2.6.4 - Wed Mar 23 08:16 -0700 2016 Jeremy Daer <jeremydaer@gmail.com>
 

diff --git a/lib/mail/attachments_list.rb b/lib/mail/attachments_list.rb
@@ -7,7 +7,7 @@ def initialize(parts_list)
       @content_disposition_type = 'attachment'
       parts_list.map { |p|
         if p.mime_type == 'message/rfc822'
-          Mail.new(p.body).attachments
+          Mail.new(p.body.encoded).attachments
         elsif p.parts.empty?
           p if p.attachment?
         else

diff --git a/lib/mail/encodings/quoted_printable.rb b/lib/mail/encodings/quoted_printable.rb
@@ -16,11 +16,11 @@ def self.can_encode?(str)
       # Decode the string from Quoted-Printable. Cope with hard line breaks
       # that were incorrectly encoded as hex instead of literal CRLF.
       def self.decode(str)
-        ::Mail::Utilities.to_lf str.gsub(/(?:=0D=0A|=0D|=0A)\r\n/, "\r\n").unpack("M*").first
+        str.gsub(/(?:=0D=0A|=0D|=0A)\r\n/, "\r\n").unpack("M*").first
       end
 
       def self.encode(str)
-        ::Mail::Utilities.to_crlf([::Mail::Utilities.to_lf(str)].pack("M"))
+        [str].pack("M")
       end
 
       def self.cost(str)

diff --git a/lib/mail/message.rb b/lib/mail/message.rb
@@ -2012,7 +2012,7 @@ def parse_message
 
     def raw_source=(value)
       value = value.dup.force_encoding(Encoding::BINARY) if RUBY_VERSION >= "1.9.1"
-      @raw_source = ::Mail::Utilities.to_crlf(value)
+      @raw_source = value
     end
 
     # see comments to body=. We take data and process it lazily

diff --git a/spec/fixtures/emails/.gitattributes b/spec/fixtures/emails/.gitattributes
@@ -0,0 +1,2 @@
+# Never autoconvert line endings on fixture emails
+*.eml -text
diff --git a/spec/fixtures/emails/attachment_emails/attachment_content_disposition.eml b/spec/fixtures/emails/attachment_emails/attachment_content_disposition.eml
@@ -1,29 +1,29 @@
-Mime-Version: 1.0 (Apple Message framework v730)
-Content-Type: multipart/mixed; boundary=Apple-Mail-13-196941151
-Message-Id: <9169D984-4E0B-45EF-82D4-8F5E53AD7012@example.com>
-From: foo@example.com
-Subject: testing
-Date: Mon, 6 Jun 2005 22:21:22 +0200
-To: blah@example.com
-
-
---Apple-Mail-13-196941151
-Content-Transfer-Encoding: quoted-printable
-Content-Type: text/plain;
-	charset=ISO-8859-1;
-	delsp=yes;
-	format=flowed
-
-This is the first part.
-
---Apple-Mail-13-196941151
-Content-Type: text/x-ruby-script; name="hello.rb"
-Content-Transfer-Encoding: 7bit
-Content-Disposition: attachment;
-	filename="api.rb"
-
-puts "Hello, world!"
-gets
-
---Apple-Mail-13-196941151--
-
+Mime-Version: 1.0 (Apple Message framework v730)
+Content-Type: multipart/mixed; boundary=Apple-Mail-13-196941151
+Message-Id: <9169D984-4E0B-45EF-82D4-8F5E53AD7012@example.com>
+From: foo@example.com
+Subject: testing
+Date: Mon, 6 Jun 2005 22:21:22 +0200
+To: blah@example.com
+
+
+--Apple-Mail-13-196941151
+Content-Transfer-Encoding: quoted-printable
+Content-Type: text/plain;
+	charset=ISO-8859-1;
+	delsp=yes;
+	format=flowed
+
+This is the first part.
+
+--Apple-Mail-13-196941151
+Content-Type: text/x-ruby-script; name="hello.rb"
+Content-Transfer-Encoding: 7bit
+Content-Disposition: attachment;
+	filename="api.rb"
+
+puts "Hello, world!"
+gets
+
+--Apple-Mail-13-196941151--
+
diff --git a/spec/fixtures/emails/attachment_emails/attachment_content_location.eml b/spec/fixtures/emails/attachment_emails/attachment_content_location.eml
@@ -1,32 +1,32 @@
-Mime-Version: 1.0 (Apple Message framework v730)
-Content-Type: multipart/mixed; boundary=Apple-Mail-13-196941151
-Message-Id: <9169D984-4E0B-45EF-82D4-8F5E53AD7012@example.com>
-From: foo@example.com
-Subject: testing
-Date: Mon, 6 Jun 2005 22:21:22 +0200
-To: blah@example.com
-
-
---Apple-Mail-13-196941151
-Content-Transfer-Encoding: quoted-printable
-Content-Type: text/plain;
-	charset=ISO-8859-1;
-	delsp=yes;
-	format=flowed
-
-This is the first part.
-
---Apple-Mail-13-196941151
-Content-Type: image/jpeg
-Content-Transfer-Encoding: base64
-Content-Location: Photo25.jpg
-Content-ID: <qbFGyPQAS8>
-Content-Disposition: inline
-
-jamisSqGSIb3DQEHAqCAMIjamisxCzAJBgUrDgMCGgUAMIAGCSqGSjamisEHAQAAoIIFSjCCBUYw
-ggQujamisQICBD++ukQwDQYJKojamisNAQEFBQAwMTELMAkGA1UEBhMCRjamisAKBgNVBAoTA1RE
-QzEUMBIGjamisxMLVERDIE9DRVMgQ0jamisNMDQwMjI5MTE1OTAxWhcNMDYwMjamisIyOTAxWjCB
-gDELMAkGA1UEjamisEsxKTAnBgNVBAoTIEjamisuIG9yZ2FuaXNhdG9yaXNrIHRpbjamisRuaW5=
-
---Apple-Mail-13-196941151--
-
+Mime-Version: 1.0 (Apple Message framework v730)
+Content-Type: multipart/mixed; boundary=Apple-Mail-13-196941151
+Message-Id: <9169D984-4E0B-45EF-82D4-8F5E53AD7012@example.com>
+From: foo@example.com
+Subject: testing
+Date: Mon, 6 Jun 2005 22:21:22 +0200
+To: blah@example.com
+
+
+--Apple-Mail-13-196941151
+Content-Transfer-Encoding: quoted-printable
+Content-Type: text/plain;
+	charset=ISO-8859-1;
+	delsp=yes;
+	format=flowed
+
+This is the first part.
+
+--Apple-Mail-13-196941151
+Content-Type: image/jpeg
+Content-Transfer-Encoding: base64
+Content-Location: Photo25.jpg
+Content-ID: <qbFGyPQAS8>
+Content-Disposition: inline
+
+jamisSqGSIb3DQEHAqCAMIjamisxCzAJBgUrDgMCGgUAMIAGCSqGSjamisEHAQAAoIIFSjCCBUYw
+ggQujamisQICBD++ukQwDQYJKojamisNAQEFBQAwMTELMAkGA1UEBhMCRjamisAKBgNVBAoTA1RE
+QzEUMBIGjamisxMLVERDIE9DRVMgQ0jamisNMDQwMjI5MTE1OTAxWhcNMDYwMjamisIyOTAxWjCB
+gDELMAkGA1UEjamisEsxKTAnBgNVBAoTIEjamisuIG9yZ2FuaXNhdG9yaXNrIHRpbjamisRuaW5=
+
+--Apple-Mail-13-196941151--
+
diff --git a/spec/fixtures/emails/attachment_emails/attachment_message_rfc822.eml b/spec/fixtures/emails/attachment_emails/attachment_message_rfc822.eml
@@ -1,93 +1,93 @@
-Mime-Version: 1.0 (Apple Message framework v730)
-Content-Type: multipart/mixed; boundary=Apple-Mail-13-196941151
-Message-Id: <9169D984-4E0B-45EF-82D4-8F5E53AD7012@example.com>
-From: foo@example.com
-Subject: testing
-Date: Mon, 6 Jun 2005 22:21:22 +0200
-To: blah@example.com
-
-
---Apple-Mail-13-196941151
-Content-Transfer-Encoding: quoted-printable
-Content-Type: text/plain;
-	charset=ISO-8859-1;
-	delsp=yes;
-	format=flowed
-
-This is the first part.
-
---Apple-Mail-13-196941151
-Content-Type: message/rfc822;
-  name="ForwardedMessage.eml";
-
-From xxxx@xxxx.com Tue May 10 11:28:07 2005
-Return-Path: <xxxx@xxxx.com>
-X-Original-To: xxxx@xxxx.com
-Delivered-To: xxxx@xxxx.com
-Received: from localhost (localhost [127.0.0.1])
-	by xxx.xxxxx.com (Postfix) with ESMTP id 50FD3A96F
-	for <xxxx@xxxx.com>; Tue, 10 May 2005 17:26:50 +0000 (GMT)
-Received: from xxx.xxxxx.com ([127.0.0.1])
- by localhost (xxx.xxxxx.com [127.0.0.1]) (amavisd-new, port 10024)
- with LMTP id 70060-03 for <xxxx@xxxx.com>;
- Tue, 10 May 2005 17:26:49 +0000 (GMT)
-Received: from xxx.xxxxx.com (xxx.xxxxx.com [69.36.39.150])
-	by xxx.xxxxx.com (Postfix) with ESMTP id 8B957A94B
-	for <xxxx@xxxx.com>; Tue, 10 May 2005 17:26:48 +0000 (GMT)
-Received: from xxx.xxxxx.com (xxx.xxxxx.com [64.233.184.203])
-	by xxx.xxxxx.com (Postfix) with ESMTP id 9972514824C
-	for <xxxx@xxxx.com>; Tue, 10 May 2005 12:26:40 -0500 (CDT)
-Received: by xxx.xxxxx.com with SMTP id 68so1694448wri
-        for <xxxx@xxxx.com>; Tue, 10 May 2005 10:26:40 -0700 (PDT)
-DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws;
-        s=beta; d=xxxxx.com;
-        h=received:message-id:date:from:reply-to:to:subject:mime-version:content-type;
-        b=g8ZO5ttS6GPEMAz9WxrRk9+9IXBUfQIYsZLL6T88+ECbsXqGIgfGtzJJFn6o9CE3/HMrrIGkN5AisxVFTGXWxWci5YA/7PTVWwPOhJff5BRYQDVNgRKqMl/SMttNrrRElsGJjnD1UyQ/5kQmcBxq2PuZI5Zc47u6CILcuoBcM+A=
-Received: by 10.54.96.19 with SMTP id t19mr621017wrb;
-        Tue, 10 May 2005 10:26:39 -0700 (PDT)
-Received: by 10.54.110.5 with HTTP; Tue, 10 May 2005 10:26:39 -0700 (PDT)
-Message-ID: <xxxx@xxxx.com>
-Date: Tue, 10 May 2005 11:26:39 -0600
-From: Test Tester <xxxx@xxxx.com>
-Reply-To: Test Tester <xxxx@xxxx.com>
-To: xxxx@xxxx.com, xxxx@xxxx.com
-Subject: Another PDF
-Mime-Version: 1.0
-Content-Type: multipart/mixed;
-	boundary="----=_Part_2192_32400445.1115745999735"
-X-Virus-Scanned: amavisd-new at textdrive.com
-
-------=_Part_2192_32400445.1115745999735
-Content-Type: text/plain; charset=ISO-8859-1
-Content-Transfer-Encoding: quoted-printable
-Content-Disposition: inline
-
-Just attaching another PDF, here, to see what the message looks like,
-and to see if I can figure out what is going wrong here.
-
-------=_Part_2192_32400445.1115745999735
-Content-Type: application/pdf; name="broken.pdf"
-Content-Transfer-Encoding: base64
-Content-Disposition: attachment; filename="broken.pdf"
-
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-------=_Part_2192_32400445.1115745999735--
-
---Apple-Mail-13-196941151--
+Mime-Version: 1.0 (Apple Message framework v730)
+Content-Type: multipart/mixed; boundary=Apple-Mail-13-196941151
+Message-Id: <9169D984-4E0B-45EF-82D4-8F5E53AD7012@example.com>
+From: foo@example.com
+Subject: testing
+Date: Mon, 6 Jun 2005 22:21:22 +0200
+To: blah@example.com
+
+
+--Apple-Mail-13-196941151
+Content-Transfer-Encoding: quoted-printable
+Content-Type: text/plain;
+	charset=ISO-8859-1;
+	delsp=yes;
+	format=flowed
+
+This is the first part.
+
+--Apple-Mail-13-196941151
+Content-Type: message/rfc822;
+  name="ForwardedMessage.eml";
+
+From xxxx@xxxx.com Tue May 10 11:28:07 2005
+Return-Path: <xxxx@xxxx.com>
+X-Original-To: xxxx@xxxx.com
+Delivered-To: xxxx@xxxx.com
+Received: from localhost (localhost [127.0.0.1])
+	by xxx.xxxxx.com (Postfix) with ESMTP id 50FD3A96F
+	for <xxxx@xxxx.com>; Tue, 10 May 2005 17:26:50 +0000 (GMT)
+Received: from xxx.xxxxx.com ([127.0.0.1])
+ by localhost (xxx.xxxxx.com [127.0.0.1]) (amavisd-new, port 10024)
+ with LMTP id 70060-03 for <xxxx@xxxx.com>;
+ Tue, 10 May 2005 17:26:49 +0000 (GMT)
+Received: from xxx.xxxxx.com (xxx.xxxxx.com [69.36.39.150])
+	by xxx.xxxxx.com (Postfix) with ESMTP id 8B957A94B
+	for <xxxx@xxxx.com>; Tue, 10 May 2005 17:26:48 +0000 (GMT)
+Received: from xxx.xxxxx.com (xxx.xxxxx.com [64.233.184.203])
+	by xxx.xxxxx.com (Postfix) with ESMTP id 9972514824C
+	for <xxxx@xxxx.com>; Tue, 10 May 2005 12:26:40 -0500 (CDT)
+Received: by xxx.xxxxx.com with SMTP id 68so1694448wri
+        for <xxxx@xxxx.com>; Tue, 10 May 2005 10:26:40 -0700 (PDT)
+DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws;
+        s=beta; d=xxxxx.com;
+        h=received:message-id:date:from:reply-to:to:subject:mime-version:content-type;
+        b=g8ZO5ttS6GPEMAz9WxrRk9+9IXBUfQIYsZLL6T88+ECbsXqGIgfGtzJJFn6o9CE3/HMrrIGkN5AisxVFTGXWxWci5YA/7PTVWwPOhJff5BRYQDVNgRKqMl/SMttNrrRElsGJjnD1UyQ/5kQmcBxq2PuZI5Zc47u6CILcuoBcM+A=
+Received: by 10.54.96.19 with SMTP id t19mr621017wrb;
+        Tue, 10 May 2005 10:26:39 -0700 (PDT)
+Received: by 10.54.110.5 with HTTP; Tue, 10 May 2005 10:26:39 -0700 (PDT)
+Message-ID: <xxxx@xxxx.com>
+Date: Tue, 10 May 2005 11:26:39 -0600
+From: Test Tester <xxxx@xxxx.com>
+Reply-To: Test Tester <xxxx@xxxx.com>
+To: xxxx@xxxx.com, xxxx@xxxx.com
+Subject: Another PDF
+Mime-Version: 1.0
+Content-Type: multipart/mixed;
+	boundary="----=_Part_2192_32400445.1115745999735"
+X-Virus-Scanned: amavisd-new at textdrive.com
+
+------=_Part_2192_32400445.1115745999735
+Content-Type: text/plain; charset=ISO-8859-1
+Content-Transfer-Encoding: quoted-printable
+Content-Disposition: inline
+
+Just attaching another PDF, here, to see what the message looks like,
+and to see if I can figure out what is going wrong here.
+
+------=_Part_2192_32400445.1115745999735
+Content-Type: application/pdf; name="broken.pdf"
+Content-Transfer-Encoding: base64
+Content-Disposition: attachment; filename="broken.pdf"
+
+JVBERi0xLjQNCiXk9tzfDQoxIDAgb2JqDQo8PCAvTGVuZ3RoIDIgMCBSDQogICAvRmlsdGVyIC9G
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+------=_Part_2192_32400445.1115745999735--
+
+--Apple-Mail-13-196941151--
diff --git a/spec/fixtures/emails/attachment_emails/attachment_only_email.eml b/spec/fixtures/emails/attachment_emails/attachment_only_email.eml
@@ -1,17 +1,17 @@
-Subject: this message JUST contains an attachment
-From: Ryan Finnie <rfinnie@domain.dom>
-To: bob@domain.dom
-Content-Disposition: attachment; filename=blah.gz
-Content-Transfer-Encoding: base64
-Content-Description: Attachment has identical content to above foo.gz
-Message-Id: <1066974048.4264.62.camel@localhost>
-Mime-Version: 1.0
-Date: 23 Oct 2003 22:40:49 -0700
-Content-Type: application/x-gzip; NAME=blah.gz
-
-SubjectthismessageJUSTcontainsanattachmentFromRyanFinnierfinniedomaindomTobo
-bdomaindomContentDispositionattachmentfilenameAblahgzContentTypeapplication/
-xgzipnameAblahgzContentTransferEncodingbase64ContentDescriptionAttachmenthas
-identicalcontenttoabovefoogzMessageId1066974048426462camellocalhostMimeVersi
-on10Date23Oct20032240490700H4sIAOHBmD8AA4vML1XPyVHISy1LLVJIy8xLUchNVeQCAHbe7
+Subject: this message JUST contains an attachment
+From: Ryan Finnie <rfinnie@domain.dom>
+To: bob@domain.dom
+Content-Disposition: attachment; filename=blah.gz
+Content-Transfer-Encoding: base64
+Content-Description: Attachment has identical content to above foo.gz
+Message-Id: <1066974048.4264.62.camel@localhost>
+Mime-Version: 1.0
+Date: 23 Oct 2003 22:40:49 -0700
+Content-Type: application/x-gzip; NAME=blah.gz
+
+SubjectthismessageJUSTcontainsanattachmentFromRyanFinnierfinniedomaindomTobo
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