From e86c1f6fc53433ef5c82ed2b7a4cc9a12c153e4c Mon Sep 17 00:00:00 2001 From: Jeremy Evans Date: Sat, 26 Jun 2021 12:32:39 -0700 Subject: [PATCH] Work around issue transcoding issue with non-ASCII compatible encodings and xml escaping When using a non-ASCII compatible source and destination encoding and xml escaping (the :xml option to String#encode), the resulting string was broken, as it used the correct non-ASCII compatible encoding, but contained data that was ASCII-compatible instead of compatible with the string's encoding. Work around this issue by detecting the case where both the source and destination encoding are non-ASCII compatible, and transcoding the source string from the non-ASCII compatible encoding to UTF-8. The xml escaping code will correctly handle the UTF-8 source string and the return the correctly encoded and escaped value. Fixes [Bug #12052] Co-authored-by: Nobuyoshi Nakada --- test/ruby/test_transcode.rb | 19 +++++++++++++++++++ transcode.c | 6 ++++++ 2 files changed, 25 insertions(+) diff --git a/test/ruby/test_transcode.rb b/test/ruby/test_transcode.rb index 04c8248697..17384fd0c7 100644 --- a/test/ruby/test_transcode.rb +++ b/test/ruby/test_transcode.rb @@ -126,6 +126,25 @@ class TestTranscode < Test::Unit::TestCase assert_equal("D\xFCrst".force_encoding('iso-8859-2'), "D\xFCrst".encode('iso-8859-2', 'iso-8859-1')) end + def test_encode_xml_multibyte + encodings = %w'UTF-8 UTF-16LE UTF-16BE UTF-32LE UTF-32BE' + encodings.each do |src_enc| + encodings.each do |dst_enc| + escaped = "<>".encode(src_enc).encode(dst_enc, :xml=>:text) + assert_equal("<>", escaped.encode('UTF-8'), "failed encoding #{src_enc} to #{dst_enc} with xml: :text") + + escaped = '<">'.encode(src_enc).encode(dst_enc, :xml=>:attr) + assert_equal('"<">"', escaped.encode('UTF-8'), "failed encoding #{src_enc} to #{dst_enc} with xml: :attr") + + escaped = "<>".encode(src_enc).force_encoding("UTF-8").encode(dst_enc, src_enc, :xml=>:text) + assert_equal("<>", escaped.encode('UTF-8'), "failed encoding #{src_enc} to #{dst_enc} with xml: :text") + + escaped = '<">'.encode(src_enc).force_encoding("UTF-8").encode(dst_enc, src_enc, :xml=>:attr) + assert_equal('"<">"', escaped.encode('UTF-8'), "failed encoding #{src_enc} to #{dst_enc} with xml: :attr") + end + end + end + def test_ascii_range encodings = [ 'US-ASCII', 'ASCII-8BIT', diff --git a/transcode.c b/transcode.c index 505c8177fb..a452448d99 100644 --- a/transcode.c +++ b/transcode.c @@ -2719,6 +2719,12 @@ str_transcode0(int argc, VALUE *argv, VALUE *self, int ecflags, VALUE ecopts) } } else { + if (senc && denc && !rb_enc_asciicompat(senc) && !rb_enc_asciicompat(denc)) { + rb_encoding *utf8 = rb_utf8_encoding(); + str = rb_str_conv_enc(str, senc, utf8); + senc = utf8; + sname = "UTF-8"; + } if (encoding_equal(sname, dname)) { sname = ""; dname = "";