diff --git a/include/mach-o/ChangeLog b/include/mach-o/ChangeLog
index 2276d0145..9e5150582 100644
--- a/include/mach-o/ChangeLog
+++ b/include/mach-o/ChangeLog
@@ -1,3 +1,7 @@
+2011-12-16  Tristan Gingold  <gingold@adacore.com>
+
+	* codesign.h: New file.
+
 2011-08-08  Tristan Gingold  <gingold@adacore.com>
 
 	* loader.h (bfd_mach_o_load_command_type): Add
diff --git a/include/mach-o/codesign.h b/include/mach-o/codesign.h
new file mode 100644
index 000000000..ee2f792ac
--- /dev/null
+++ b/include/mach-o/codesign.h
@@ -0,0 +1,85 @@
+/* Mach-O support for BFD.
+   Copyright 2011
+   Free Software Foundation, Inc.
+
+   This file is part of BFD, the Binary File Descriptor library.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+   MA 02110-1301, USA.  */
+
+#ifndef _MACH_O_CODESIGN_H
+#define _MACH_O_CODESIGN_H
+
+/* Codesign blob magics.  */
+
+/* Superblob containing all the components.  */
+#define BFD_MACH_O_CS_MAGIC_EMBEDDED_SIGNATURE 0xfade0cc0
+
+/* Individual code requirement.  */
+#define BFD_MACH_O_CS_MAGIC_REQUIREMENT 0xfade0c00
+
+/* Collection of code requirements, indexed by type.  */
+#define BFD_MACH_O_CS_MAGIC_REQUIREMENTS 0xfade0c01
+
+/* Directory.  */
+#define BFD_MACH_O_CS_MAGIC_CODEDIRECTORY 0xfade0c02
+
+/* Entitlements blob.  */
+#define BFD_MACH_O_CS_MAGIC_EMBEDDED_ENTITLEMENTS 0xfade7171
+
+/* Blob container.  */
+#define BFD_MACH_O_CS_MAGIC_BLOB_WRAPPER 0xfade0b01
+
+struct mach_o_codesign_codedirectory_external_v1
+{
+  /* All the fields are in network byte order (big endian).  */
+  unsigned char version[4];
+  unsigned char flags[4];
+  unsigned char hash_offset[4];
+  unsigned char ident_offset[4];
+  unsigned char nbr_special_slots[4];
+  unsigned char nbr_code_slots[4];
+  unsigned char code_limit[4];
+  unsigned char hash_size[1];
+  unsigned char hash_type[1];
+  unsigned char spare1[1];
+  unsigned char page_size[1];
+  unsigned char spare2[4];
+};
+
+struct mach_o_codesign_codedirectory_v1
+{
+  unsigned int version;
+  unsigned int flags;
+  unsigned int hash_offset;
+  unsigned int ident_offset;
+  unsigned int nbr_special_slots;
+  unsigned int nbr_code_slots;
+  unsigned int code_limit;
+  unsigned char hash_size;
+  unsigned char hash_type;
+  unsigned char spare1;
+  unsigned char page_size;
+  unsigned int spare2;
+};
+
+/* Value for hash_type.  */
+#define BFD_MACH_O_CS_NO_HASH 0
+#define BFD_MACH_O_CS_HASH_SHA1 1
+#define BFD_MACH_O_CS_HASH_SHA256 2
+#define BFD_MACH_O_CS_HASH_PRESTANDARD_SKEIN_160x256 32 /* Skein, 160 bits */
+#define BFD_MACH_O_CS_HASH_PRESTANDARD_SKEIN_256x512 33 /* Skein, 256 bits */
+
+#endif /* _MACH_O_CODESIGN_H */