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| author | David Trudgian <dave@trudgian.net> | 2020-01-04 09:19:17 -0600 |
|---|---|---|
| committer | Danny Milosavljevic <dannym@scratchpost.org> | 2020-01-05 11:14:00 +0100 |
| commit | 7aa28eb339dd667d07cfb8b5347e159d5da3ccd7 (patch) | |
| tree | 05b2af8453b524d97d1ddfd6c45ea4b395f3b2d9 /gnu | |
| parent | 7f16122efd59472ecc63a231054471c2bad5a46b (diff) | |
| download | guix-7aa28eb339dd667d07cfb8b5347e159d5da3ccd7.tar.gz | |
file-systems: Handle LUKS2 header.
* gnu/build/file-systems.scm (luks-superblock?): Handle LUKS2 header. Signed-off-by: Danny Milosavljevic <dannym@scratchpost.org>
Diffstat (limited to 'gnu')
| -rw-r--r-- | gnu/build/file-systems.scm | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/gnu/build/file-systems.scm b/gnu/build/file-systems.scm index 9299cc2e4c..ee6375515f 100644 --- a/gnu/build/file-systems.scm +++ b/gnu/build/file-systems.scm @@ -4,6 +4,7 @@ ;;; Copyright © 2017 Mathieu Othacehe <m.othacehe@gmail.com> ;;; Copyright © 2019 Guillaume Le Vaillant <glv@posteo.net> ;;; Copyright © 2019 Tobias Geerinckx-Rice <me@tobias.gr> +;;; Copyright © 2019 David C. Trudgian <dave@trudgian.net> ;;; ;;; This file is part of GNU Guix. ;;; @@ -343,6 +344,10 @@ if DEVICE does not contain a JFS file system." ;; <https://gitlab.com/cryptsetup/cryptsetup/wikis/Specification>. We follow ;; version 1.2.1 of this document. +;; The LUKS2 header format is described in "LUKS2 On-Disk Format Specification": +;; <https://gitlab.com/cryptsetup/LUKS2-docs/blob/master/luks2_doc_wip.pdf>. +;; It is a WIP document. + (define-syntax %luks-endianness ;; Endianness of LUKS headers. (identifier-syntax (endianness big))) @@ -356,12 +361,16 @@ if DEVICE does not contain a JFS file system." (let ((magic (sub-bytevector sblock 0 6)) (version (bytevector-u16-ref sblock 6 %luks-endianness))) (and (bytevector=? magic %luks-magic) - (= version 1)))) + (or (= version 1) (= version 2))))) (define (read-luks-header file) "Read a LUKS header from FILE. Return the raw header on success, and #f if not valid header was found." - ;; Size in bytes of the LUKS header, including key slots. + ;; Size in bytes of the LUKS binary header, which includes key slots in + ;; LUKS1. In LUKS2 the binary header is partially backward compatible, so + ;; that UUID can be extracted as for LUKS1. Keyslots and other metadata are + ;; not part of this header in LUKS2, but are included in the JSON metadata + ;; area that follows. (read-superblock file 0 592 luks-superblock?)) (define (luks-header-uuid header) |