#include "bfdlink.h"
#include "mach-o.h"
#include "mach-o/external.h"
+#include "mach-o/codesign.h"
/* Index of the options in the options[] array. */
#define OPT_HEADER 0
#define OPT_MAP 2
#define OPT_LOAD 3
#define OPT_DYSYMTAB 4
+#define OPT_CODESIGN 5
/* List of actions. */
static struct objdump_private_option options[] =
{ "map", 0 },
{ "load", 0 },
{ "dysymtab", 0 },
+ { "codesign", 0 },
{ NULL, 0 }
};
map Display the section map\n\
load Display the load commands\n\
dysymtab Display the dynamic symbol table\n\
+ codesign Display code signature section\n\
"));
}
fputs (_("Mach-O header:\n"), stdout);
printf (_(" magic : %08lx\n"), h->magic);
printf (_(" cputype : %08lx (%s)\n"), h->cputype,
- bfd_mach_o_get_name (bfd_mach_o_cpu_name, h->cputype));
+ bfd_mach_o_get_name (bfd_mach_o_cpu_name, h->cputype));
printf (_(" cpusubtype: %08lx\n"), h->cpusubtype);
printf (_(" filetype : %08lx (%s)\n"),
- h->filetype,
- bfd_mach_o_get_name (bfd_mach_o_filetype_name, h->filetype));
+ h->filetype,
+ bfd_mach_o_get_name (bfd_mach_o_filetype_name, h->filetype));
printf (_(" ncmds : %08lx (%lu)\n"), h->ncmds, h->ncmds);
printf (_(" sizeofcmds: %08lx\n"), h->sizeofcmds);
printf (_(" flags : %08lx ("), h->flags);
{
char *buf = xmalloc (flavour->size);
- if (buf
- && bfd_seek (abfd, flavour->offset, SEEK_SET) == 0
- && (bfd_bread (buf, flavour->size, abfd)
- == flavour->size))
+ if (bfd_seek (abfd, flavour->offset, SEEK_SET) == 0
+ && bfd_bread (buf, flavour->size, abfd) == flavour->size)
(*bed->_bfd_mach_o_print_thread)(abfd, flavour, stdout, buf);
+
free (buf);
}
}
}
+static const bfd_mach_o_xlat_name bfd_mach_o_cs_magic[] =
+{
+ { "embedded signature", BFD_MACH_O_CS_MAGIC_EMBEDDED_SIGNATURE },
+ { "requirement", BFD_MACH_O_CS_MAGIC_REQUIREMENT },
+ { "requirements", BFD_MACH_O_CS_MAGIC_REQUIREMENTS },
+ { "code directory", BFD_MACH_O_CS_MAGIC_CODEDIRECTORY },
+ { "embedded entitlements", BFD_MACH_O_CS_MAGIC_EMBEDDED_ENTITLEMENTS },
+ { "blob wrapper", BFD_MACH_O_CS_MAGIC_BLOB_WRAPPER },
+ { NULL, 0 }
+};
+
+static const bfd_mach_o_xlat_name bfd_mach_o_cs_hash_type[] =
+{
+ { "no-hash", BFD_MACH_O_CS_NO_HASH },
+ { "sha1", BFD_MACH_O_CS_HASH_SHA1 },
+ { "sha256", BFD_MACH_O_CS_HASH_SHA256 },
+ { "skein 160", BFD_MACH_O_CS_HASH_PRESTANDARD_SKEIN_160x256 },
+ { "skein 256", BFD_MACH_O_CS_HASH_PRESTANDARD_SKEIN_256x512 },
+ { NULL, 0 }
+};
+
+static unsigned int
+dump_code_signature_blob (bfd *abfd, const unsigned char *buf, unsigned int len);
+
+static void
+dump_code_signature_superblob (bfd *abfd ATTRIBUTE_UNUSED,
+ const unsigned char *buf, unsigned int len)
+{
+ unsigned int count;
+ unsigned int i;
+
+ if (len < 12)
+ {
+ printf (_(" [bad block length]\n"));
+ return;
+ }
+ count = bfd_getb32 (buf + 8);
+ printf (_(" %u index entries:\n"), count);
+ if (len < 12 + 8 * count)
+ {
+ printf (_(" [bad block length]\n"));
+ return;
+ }
+ for (i = 0; i < count; i++)
+ {
+ unsigned int type;
+ unsigned int off;
+
+ type = bfd_getb32 (buf + 12 + 8 * i);
+ off = bfd_getb32 (buf + 12 + 8 * i + 4);
+ printf (_(" index entry %u: type: %08x, offset: %08x\n"),
+ i, type, off);
+
+ dump_code_signature_blob (abfd, buf + off, len - off);
+ }
+}
+
+static void
+swap_code_codedirectory_v1_in
+ (const struct mach_o_codesign_codedirectory_external_v1 *src,
+ struct mach_o_codesign_codedirectory_v1 *dst)
+{
+ dst->version = bfd_getb32 (src->version);
+ dst->flags = bfd_getb32 (src->flags);
+ dst->hash_offset = bfd_getb32 (src->hash_offset);
+ dst->ident_offset = bfd_getb32 (src->ident_offset);
+ dst->nbr_special_slots = bfd_getb32 (src->nbr_special_slots);
+ dst->nbr_code_slots = bfd_getb32 (src->nbr_code_slots);
+ dst->code_limit = bfd_getb32 (src->code_limit);
+ dst->hash_size = src->hash_size[0];
+ dst->hash_type = src->hash_type[0];
+ dst->spare1 = src->spare1[0];
+ dst->page_size = src->page_size[0];
+ dst->spare2 = bfd_getb32 (src->spare2);
+}
+
+static void
+hexdump (unsigned int start, unsigned int len,
+ const unsigned char *buf)
+{
+ unsigned int i, j;
+
+ for (i = 0; i < len; i += 16)
+ {
+ printf ("%08x:", start + i);
+ for (j = 0; j < 16; j++)
+ {
+ fputc (j == 8 ? '-' : ' ', stdout);
+ if (i + j < len)
+ printf ("%02x", buf[i + j]);
+ else
+ fputs (" ", stdout);
+ }
+ fputc (' ', stdout);
+ for (j = 0; j < 16; j++)
+ {
+ if (i + j < len)
+ fputc (ISPRINT (buf[i + j]) ? buf[i + j] : '.', stdout);
+ else
+ fputc (' ', stdout);
+ }
+ fputc ('\n', stdout);
+ }
+}
+
+static void
+dump_code_signature_codedirectory (bfd *abfd ATTRIBUTE_UNUSED,
+ const unsigned char *buf, unsigned int len)
+{
+ struct mach_o_codesign_codedirectory_v1 cd;
+ const char *id;
+
+ if (len < sizeof (struct mach_o_codesign_codedirectory_external_v1))
+ {
+ printf (_(" [bad block length]\n"));
+ return;
+ }
+
+ swap_code_codedirectory_v1_in
+ ((const struct mach_o_codesign_codedirectory_external_v1 *) (buf + 8), &cd);
+
+ printf (_(" version: %08x\n"), cd.version);
+ printf (_(" flags: %08x\n"), cd.flags);
+ printf (_(" hash offset: %08x\n"), cd.hash_offset);
+ id = (const char *) buf + cd.ident_offset;
+ printf (_(" ident offset: %08x (- %08x)\n"),
+ cd.ident_offset, cd.ident_offset + (unsigned) strlen (id) + 1);
+ printf (_(" identity: %s\n"), id);
+ printf (_(" nbr special slots: %08x (at offset %08x)\n"),
+ cd.nbr_special_slots,
+ cd.hash_offset - cd.nbr_special_slots * cd.hash_size);
+ printf (_(" nbr code slots: %08x\n"), cd.nbr_code_slots);
+ printf (_(" code limit: %08x\n"), cd.code_limit);
+ printf (_(" hash size: %02x\n"), cd.hash_size);
+ printf (_(" hash type: %02x (%s)\n"),
+ cd.hash_type,
+ bfd_mach_o_get_name (bfd_mach_o_cs_hash_type, cd.hash_type));
+ printf (_(" spare1: %02x\n"), cd.spare1);
+ printf (_(" page size: %02x\n"), cd.page_size);
+ printf (_(" spare2: %08x\n"), cd.spare2);
+ if (cd.version >= 0x20100)
+ printf (_(" scatter offset: %08x\n"),
+ (unsigned) bfd_getb32 (buf + 44));
+}
+
+static unsigned int
+dump_code_signature_blob (bfd *abfd, const unsigned char *buf, unsigned int len)
+{
+ unsigned int magic;
+ unsigned int length;
+
+ if (len < 8)
+ {
+ printf (_(" [truncated block]\n"));
+ return 0;
+ }
+ magic = bfd_getb32 (buf);
+ length = bfd_getb32 (buf + 4);
+ if (magic == 0 || length == 0)
+ return 0;
+
+ printf (_(" magic : %08x (%s)\n"), magic,
+ bfd_mach_o_get_name (bfd_mach_o_cs_magic, magic));
+ printf (_(" length: %08x\n"), length);
+ if (length > len)
+ {
+ printf (_(" [bad block length]\n"));
+ return 0;
+ }
+
+ switch (magic)
+ {
+ case BFD_MACH_O_CS_MAGIC_EMBEDDED_SIGNATURE:
+ dump_code_signature_superblob (abfd, buf, length);
+ break;
+ case BFD_MACH_O_CS_MAGIC_CODEDIRECTORY:
+ dump_code_signature_codedirectory (abfd, buf, length);
+ break;
+ default:
+ hexdump (0, length - 8, buf + 8);
+ break;
+ }
+ return length;
+}
+
+static void
+dump_code_signature (bfd *abfd, bfd_mach_o_linkedit_command *cmd)
+{
+ unsigned char *buf = xmalloc (cmd->datasize);
+ unsigned int off;
+
+ if (bfd_seek (abfd, cmd->dataoff, SEEK_SET) != 0
+ || bfd_bread (buf, cmd->datasize, abfd) != cmd->datasize)
+ {
+ non_fatal (_("cannot read code signature data"));
+ free (buf);
+ return;
+ }
+ for (off = 0; off < cmd->datasize;)
+ {
+ unsigned int len;
+
+ len = dump_code_signature_blob (abfd, buf + off, cmd->datasize - off);
+
+ if (len == 0)
+ break;
+ off += len;
+ }
+ free (buf);
+}
+
static void
dump_load_command (bfd *abfd, bfd_mach_o_load_command *cmd,
bfd_boolean verbose)
" dataoff: 0x%08lx datasize: 0x%08lx (endoff: 0x%08lx)\n",
linkedit->dataoff, linkedit->datasize,
linkedit->dataoff + linkedit->datasize);
+
+ if (verbose && cmd->type == BFD_MACH_O_LC_CODE_SIGNATURE)
+ dump_code_signature (abfd, linkedit);
break;
}
case BFD_MACH_O_LC_SUB_FRAMEWORK:
dump_load_commands (abfd, 0, 0);
if (options[OPT_DYSYMTAB].selected)
dump_load_commands (abfd, BFD_MACH_O_LC_DYSYMTAB, 0);
+ if (options[OPT_CODESIGN].selected)
+ dump_load_commands (abfd, BFD_MACH_O_LC_CODE_SIGNATURE, 0);
}
/* Vector for Mach-O. */
--- /dev/null
+/* 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 */
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