From abbbeea236a18ccf91ee141d3d0f6cf9b488017c Mon Sep 17 00:00:00 2001
From: Denis <denis@sokolov.cc>
Date: Tue, 10 Dec 2013 00:25:55 +0200
Subject: [PATCH] Content-Transfer-Encoding value not case sensitive

---
 library/Zend/Mail/Header/ContentTransferEncoding.php       | 3 +++
 tests/ZendTest/Mail/Header/ContentTransferEncodingTest.php | 7 +++++++
 2 files changed, 10 insertions(+)

diff --git a/library/Zend/Mail/Header/ContentTransferEncoding.php b/library/Zend/Mail/Header/ContentTransferEncoding.php
index 3c371474916..1a9491a1a93 100644
--- a/library/Zend/Mail/Header/ContentTransferEncoding.php
+++ b/library/Zend/Mail/Header/ContentTransferEncoding.php
@@ -91,6 +91,9 @@ public function toString()
      */
     public function setTransferEncoding($transferEncoding)
     {
+        // Per RFC 1521, the value of the header is not case sensitive
+        $transferEncoding = strtolower($transferEncoding);
+
         if (!in_array($transferEncoding, self::$allowedTransferEncodings)) {
             throw new Exception\InvalidArgumentException(sprintf(
                 '%s expects one of "'. implode(', ', self::$allowedTransferEncodings) . '"; received "%s"',
diff --git a/tests/ZendTest/Mail/Header/ContentTransferEncodingTest.php b/tests/ZendTest/Mail/Header/ContentTransferEncodingTest.php
index ffbc3729cfe..16e5eb7490a 100644
--- a/tests/ZendTest/Mail/Header/ContentTransferEncodingTest.php
+++ b/tests/ZendTest/Mail/Header/ContentTransferEncodingTest.php
@@ -43,6 +43,13 @@ public function testContentTransferEncodingGetFieldValueReturnsProperValue()
         $this->assertEquals('7bit', $contentTransferEncodingHeader->getFieldValue());
     }
 
+    public function testContentTransferEncodingHandlesCaseInsensitivity()
+    {
+        $encoding = new ContentTransferEncoding();
+        $encoding->setTransferEncoding('quOtED-printAble');
+        $this->assertEquals('quoted-printable', strtolower($encoding->getFieldValue()));
+    }
+
     public function testContentTransferEncodingToStringReturnsHeaderFormattedString()
     {
         $contentTransferEncodingHeader = new ContentTransferEncoding();