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g13: First chunk of code to support dm-crypt.

Browse source 
* g13/call-syshelp.c, g13/call-syshelp.h: New.
* g13/g13-syshelp.c, g13/g13-syshelp.h: New.
* g13/sh-cmd.c: New.
* g13/sh-blockdev.c: New.
* g13/sh-exectool.c: New.
* g13/sh-dmcrypt.c: New.
* g13/Makefile.am (sbin_PROGRAMS): Add g13-syshelp.c
(g13_syshelp_SOURCES): New.
(g13_syshelp_LDADD): New.

* g13/g13.c (opts): Add option --type.
(g13_deinit_default_ctrl): New.
(main): Implement that option.  Call g13_deinit_default_ctrl.
* g13/g13.h (struct call_syshelp_s): New declaration.
(server_control_s): Add field syshelp_local.
* g13/keyblob.h (KEYBLOB_TAG_CREATED): New.
(KEYBLOB_TAG_ALGOSTR): New.
(KEYBLOB_TAG_HDRCOPY): New.
* g13/backend.c (be_parse_conttype_name): New.
(be_get_detached_name): Add CONTTYPE_DM_CRYPT.

Signed-off-by: Werner Koch <wk@gnupg.org>
This commit is contained in:
Werner Koch 2015-10-21 08:38:10 +02:00
parent d711f5c769
commit 81494fd30d
No known key found for this signature in database
GPG key ID: E3FDFF218E45B72B
14 changed files with 2489 additions and 9 deletions
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29
g13/keyblob.h
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@ -20,7 +20,8 @@
#ifndef G13_KEYBLOB_H
#define G13_KEYBLOB_H
/* The header block is the actual core of G13. Here is the format:
/* The setup area (header block) is the actual core of G13. Here is
the format:
u8 Packet type. Value is 61 (0x3d).
u8 Constant value 255 (0xff).
@ -29,7 +30,7 @@
u8 Version. Value is 1.
u8 reserved
u8 reserved
u8 OS Flag: reserved, should be 0.
u8 OS Flag: 0 = unspecified, 1 = Linux
u32 Length of the entire header. This includes all bytes
starting at the packet type and ending with the last
padding byte of the header.
@ -37,9 +38,9 @@
u8 Number of copies of this header at the end of the
container (usually 0).
b6 reserved
n bytes: OpenPGP encrypted and optionally signed message.
n bytes: CMS encrypted and optionally signed packet. Such a CMS
packet will be enclosed in a a private flagged OpenPGP
n bytes: OpenPGP encrypted and optionally signed keyblob.
n bytes: CMS encrypted and optionally signed keyblob. Such a CMS
packet will be enclosed in a private flagged OpenPGP
packet. Either the OpenPGP encrypted packet as described
above, the CMS encrypted or both packets must exist. The
encapsulation packet has this structure:
@ -54,6 +55,8 @@
u32 Length of the following structure
b10 Value: "GnuPG/PAD\x00".
b(n) Padding stuff.
(repeat the above value
or if the remaining N < 10, all 0x00).
Given this structure the minimum padding is 16 bytes.
n bytes: File system container.
@ -77,6 +80,14 @@
keyblob. If a value is given it is expected to be the GUID of the
partition. */
#define KEYBLOB_TAG_CREATED 3
/* This is an ISO 8601 time string with the date the container was
created. */
#define KEYBLOB_TAG_ALGOSTR 10
/* For a dm-crypt container this is the used algorithm string. For
example: "aes-cbc-essiv:sha256". */
#define KEYBLOB_TAG_KEYNO 16
/* This tag indicates a new key. The value is a 4 byte big endian
integer giving the key number. If the container type does only
@ -105,8 +116,14 @@
The value is the key used for MACing. */
#define KEYBLOB_TAG_HDRCOPY 21
/* The value of this tag is a copy of the setup area prefix header
block (packet 61 with marker "GnuPG/G13\x00". We use it to allow
signing of that cleartext data. */
#define KEYBLOB_TAG_FILLER 0xffff
/* This tag may be used for alignment and padding porposes. The value
/* This tag may be used for alignment and padding purposes. The value
has no meaning. */