Fix integer overflow

    Make use of the check in rb_alloc_tmp_buffer2.

    https://hackerone.com/reports/1328463

    When parsing cookies, only decode the values

    Bump version

    Co-authored-by: Nobuyoshi Nakada <nobu@ruby-lang.org>
    Co-authored-by: Yusuke Endoh <mame@ruby-lang.org>

ext/cgi/escape/escape.c

@@ -36,7 +36,8 @@ static VALUE
 optimized_escape_html(VALUE str)
 {
     VALUE vbuf;
-    char *buf = ALLOCV_N(char, vbuf, RSTRING_LEN(str) * HTML_ESCAPE_MAX_LEN);
+    typedef char escape_buf[HTML_ESCAPE_MAX_LEN];
+    char *buf = *ALLOCV_N(escape_buf, vbuf, RSTRING_LEN(str));
     const char *cstr = RSTRING_PTR(str);
     const char *end = cstr + RSTRING_LEN(str);
 

lib/cgi.rb

@@ -288,7 +288,7 @@
 #
 
 class CGI
-  VERSION = "0.2.0"
+  VERSION = "0.2.1"
 end
 
 require 'cgi/core'

lib/cgi/cookie.rb

@@ -159,7 +159,6 @@ def self.parse(raw_cookie)
       raw_cookie.split(/;\s?/).each do |pairs|
         name, values = pairs.split('=',2)
         next unless name and values
-        name = CGI.unescape(name)
         values ||= ""
         values = values.split('&').collect{|v| CGI.unescape(v,@@accept_charset) }
         if cookies.has_key?(name)

test/cgi/test_cgi_cookie.rb

@@ -101,6 +101,11 @@ def test_cgi_cookie_parse
     end
   end
 
+  def test_cgi_cookie_parse_not_decode_name
+    cookie_str = "%66oo=baz;foo=bar"
+    cookies = CGI::Cookie.parse(cookie_str)
+    assert_equal({"%66oo" => ["baz"], "foo" => ["bar"]}, cookies)
+  end
 
   def test_cgi_cookie_arrayinterface
     cookie = CGI::Cookie.new('name1', 'a', 'b', 'c')

version.h

@@ -12,7 +12,7 @@
 # define RUBY_VERSION_MINOR RUBY_API_VERSION_MINOR
 #define RUBY_VERSION_TEENY 3
 #define RUBY_RELEASE_DATE RUBY_RELEASE_YEAR_STR"-"RUBY_RELEASE_MONTH_STR"-"RUBY_RELEASE_DAY_STR
-#define RUBY_PATCHLEVEL 156
+#define RUBY_PATCHLEVEL 157
 
 #define RUBY_RELEASE_YEAR 2021
 #define RUBY_RELEASE_MONTH 11