Define ASN1 bitmask macros in more direct way
diff --git a/include/mbedtls/asn1.h b/include/mbedtls/asn1.h
index 8d35c42..75b7b3d 100644
--- a/include/mbedtls/asn1.h
+++ b/include/mbedtls/asn1.h
@@ -99,9 +99,9 @@
* | Class | P/C | Tag number |
* +-------+-----+------------+
*/
-#define MBEDTLS_ASN1_TAG_CLASS_MASK ( 0x03 << 6 )
-#define MBEDTLS_ASN1_TAG_PC_MASK ( 0x01 << 5 )
-#define MBEDTLS_ASN1_TAG_VALUE_MASK ( 0x1F << 0 )
+#define MBEDTLS_ASN1_TAG_CLASS_MASK 0xC0
+#define MBEDTLS_ASN1_TAG_PC_MASK 0x20
+#define MBEDTLS_ASN1_TAG_VALUE_MASK 0x1F
/* \} name */
/* \} addtogroup asn1_module */