diff options
Diffstat (limited to 'g13/keyblob.h')
| -rw-r--r-- | g13/keyblob.h | 29 |
1 files changed, 23 insertions, 6 deletions
diff --git a/g13/keyblob.h b/g13/keyblob.h index 5c3e74e12..47310e185 100644 --- a/g13/keyblob.h +++ b/g13/keyblob.h @@ -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. */ |