diff --git a/ChangeLog b/ChangeLog
index 55da807d5b..cfb299b3ca 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Tue Aug 23 06:07:02 2005  GOTOU Yuuzou  <gotoyuzo@notwork.org>
+
+	* ext/openssl/lib/digest.rb: added SHA224, SHA256, SHA384 and SHA512.
+	  these features are enabled if this library is compiled with
+	  OpenSSL 0.9.8 or later.
+
 Tue Aug 23 05:47:04 2005  GOTOU Yuuzou  <gotoyuzo@notwork.org>
 
 	* ext/openssl/ossl_ns_spki.c (ossl_spki_initialize): try to decode
diff --git a/ext/openssl/lib/openssl/digest.rb b/ext/openssl/lib/openssl/digest.rb
index 58622f543e..5745661c3c 100644
--- a/ext/openssl/lib/openssl/digest.rb
+++ b/ext/openssl/lib/openssl/digest.rb
@@ -21,8 +21,13 @@
 module OpenSSL
   module Digest
 
-    %w(DSS DSS1 MD2 MD4 MD5 MDC2 RIPEMD160 SHA SHA1).each{|digest|
-      eval(<<-EOD)
+    alg = %w(DSS DSS1 MD2 MD4 MD5 MDC2 RIPEMD160 SHA SHA1)
+    if OPENSSL_VERSION_NUMBER > 0x00908000
+      alg += %w(SHA224 SHA256 SHA384 SHA512)
+    end
+
+    alg.each{|digest|
+      self.module_eval(<<-EOD)
         class #{digest} < Digest
           def initialize(data=nil)
             super(\"#{digest}\", data)