diff --git a/ChangeLog b/ChangeLog
index bb91ef7c7f..957d25c2be 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+Tue Dec 21 22:07:41 2004  GOTOU Yuuzou  <gotoyuzo@notwork.org>
+
+	* ext/openssl/ossl_asn1.c (ossl_asn1_decode_all): use rb_str_new4
+	  to avoid SEGV.
+
+	* ext/openssl/ossl_asn1.c (ossl_asn1_traverse, ossl_asn1_decode,
+	  ossl_asn1_decode_all): temporary value should be marked volatile.
+
 Tue Dec 21 12:42:34 2004  GOTOU Yuuzou  <gotoyuzo@notwork.org>
 
 	* ext/openssl/ossl_asn1.c (ossl_asn1_traverse, ossl_asn1_decode):
diff --git a/ext/openssl/ossl_asn1.c b/ext/openssl/ossl_asn1.c
index f353ce9b7a..1ce5fa50c5 100644
--- a/ext/openssl/ossl_asn1.c
+++ b/ext/openssl/ossl_asn1.c
@@ -813,11 +813,12 @@ ossl_asn1_traverse(VALUE self, VALUE obj)
 {
     unsigned char *p;
     long offset = 0;
+    volatile VALUE tmp;
 
     obj = ossl_to_der_if_possible(obj);
-    obj = rb_str_new4(StringValue(obj));
-    p = RSTRING(obj)->ptr;
-    ossl_asn1_decode0(&p, RSTRING(obj)->len, &offset, 0, 0, 1);
+    tmp = rb_str_new4(StringValue(obj));
+    p = RSTRING(tmp)->ptr;
+    ossl_asn1_decode0(&p, RSTRING(tmp)->len, &offset, 0, 0, 1);
 
     return Qnil;
 }
@@ -828,11 +829,12 @@ ossl_asn1_decode(VALUE self, VALUE obj)
     VALUE ret, ary;
     unsigned char *p;
     long offset = 0;
+    volatile VALUE tmp;
 
     obj = ossl_to_der_if_possible(obj);
-    obj = rb_str_new4(StringValue(obj));
-    p = RSTRING(obj)->ptr;
-    ary = ossl_asn1_decode0(&p, RSTRING(obj)->len, &offset, 0, 1, 0);
+    tmp = rb_str_new4(StringValue(obj));
+    p = RSTRING(tmp)->ptr;
+    ary = ossl_asn1_decode0(&p, RSTRING(tmp)->len, &offset, 0, 1, 0);
     ret = rb_ary_entry(ary, 0);
 
     return ret;
@@ -844,11 +846,12 @@ ossl_asn1_decode_all(VALUE self, VALUE obj)
     VALUE ret;
     unsigned char *p;
     long offset = 0;
+    volatile VALUE tmp;
 
     obj = ossl_to_der_if_possible(obj);
-    StringValue(obj);
-    p = RSTRING(obj)->ptr;
-    ret = ossl_asn1_decode0(&p, RSTRING(obj)->len, &offset, 0, 0, 0);
+    tmp = rb_str_new4(StringValue(obj));
+    p = RSTRING(tmp)->ptr;
+    ret = ossl_asn1_decode0(&p, RSTRING(tmp)->len, &offset, 0, 0, 0);
 
     return ret;
 }