From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from firstgate.proxmox.com (firstgate.proxmox.com [212.224.123.68]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by lists.proxmox.com (Postfix) with ESMTPS id 5C7679E24F for ; Mon, 27 Nov 2023 11:16:49 +0100 (CET) Received: from firstgate.proxmox.com (localhost [127.0.0.1]) by firstgate.proxmox.com (Proxmox) with ESMTP id 44C3B49CA for ; Mon, 27 Nov 2023 11:16:49 +0100 (CET) Received: from proxmox-new.maurer-it.com (proxmox-new.maurer-it.com [94.136.29.106]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by firstgate.proxmox.com (Proxmox) with ESMTPS for ; Mon, 27 Nov 2023 11:16:48 +0100 (CET) Received: from proxmox-new.maurer-it.com (localhost.localdomain [127.0.0.1]) by proxmox-new.maurer-it.com (Proxmox) with ESMTP id 52DF344A5D for ; Mon, 27 Nov 2023 11:16:48 +0100 (CET) From: Gabriel Goller To: pbs-devel@lists.proxmox.com Date: Mon, 27 Nov 2023 11:16:42 +0100 Message-Id: <20231127101644.74160-2-g.goller@proxmox.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20231127101644.74160-1-g.goller@proxmox.com> References: <20231127101644.74160-1-g.goller@proxmox.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SPAM-LEVEL: Spam detection results: 0 AWL -0.215 Adjusted score from AWL reputation of From: address BAYES_00 -1.9 Bayes spam probability is 0 to 1% DMARC_MISSING 0.1 Missing DMARC policy KAM_DMARC_STATUS 0.01 Test Rule for DKIM or SPF Failure with Strict Alignment SPF_HELO_NONE 0.001 SPF: HELO does not publish an SPF Record SPF_PASS -0.001 SPF: sender matches SPF record T_SCC_BODY_TEXT_LINE -0.01 - URIBL_BLOCKED 0.001 ADMINISTRATOR NOTICE: The query to URIBL was blocked. See http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block for more information. [uefi.org, lib.rs] Subject: [pbs-devel] [PATCH v3 proxmox 1/3] sys: add function to get boot_mode X-BeenThere: pbs-devel@lists.proxmox.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: Proxmox Backup Server development discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 27 Nov 2023 10:16:49 -0000 Helper that returns the current boot_mode. Either EFI, BIOS, or EFI (Secure Boot). Detection works the same as in pve, we use `/sys/firmware/efi` and the `efivars/SecureBoot-xxx..` file. Signed-off-by: Gabriel Goller --- proxmox-sys/src/boot_mode.rs | 54 ++++++++++++++++++++++++++++++++++++ proxmox-sys/src/lib.rs | 1 + 2 files changed, 55 insertions(+) create mode 100644 proxmox-sys/src/boot_mode.rs diff --git a/proxmox-sys/src/boot_mode.rs b/proxmox-sys/src/boot_mode.rs new file mode 100644 index 0000000..6dcdf07 --- /dev/null +++ b/proxmox-sys/src/boot_mode.rs @@ -0,0 +1,54 @@ +use std::{io::Read, sync::Mutex}; + +#[derive(Clone, Copy)] +pub enum SecureBoot { + /// SecureBoot is enabled + Enabled, + /// SecureBoot is disabled + Disabled, +} + +/// The possible BootModes +#[derive(Clone, Copy)] +pub enum BootModeInformation { + /// The BootMode is EFI/UEFI, has a SecureBoot variant + Efi(SecureBoot), + /// The BootMode is Legacy BIOS + Bios, +} + +// Returns the current bootmode (BIOS, EFI, or EFI(Secure Boot)) +pub fn boot_mode() -> BootModeInformation { + lazy_static::lazy_static!( + static ref BOOT_MODE: Mutex> = Mutex::new(None); + ); + + let mut last = BOOT_MODE.lock().unwrap(); + let value = last.or_else(|| { + if std::path::Path::new("/sys/firmware/efi").exists() { + // Check if SecureBoot is enabled + // Attention: this file is not seekable! + // Spec: https://uefi.org/specs/UEFI/2.10/03_Boot_Manager.html?highlight=8be4d#globally-defined-variables + let efivar = std::fs::File::open( + "/sys/firmware/efi/efivars/SecureBoot-8be4df61-93ca-11d2-aa0d-00e098032b8c", + ); + if let Ok(mut file) = efivar { + let mut buf = [0; 5]; + let Ok(_) = file.read_exact(&mut buf) else { + return Some(BootModeInformation::Efi(SecureBoot::Disabled)); + }; + if buf[4..] == [1] { + Some(BootModeInformation::Efi(SecureBoot::Enabled)) + } else { + Some(BootModeInformation::Efi(SecureBoot::Disabled)) + } + } else { + Some(BootModeInformation::Efi(SecureBoot::Disabled)) + } + } else { + Some(BootModeInformation::Bios) + } + }); + *last = value; + value.unwrap() +} diff --git a/proxmox-sys/src/lib.rs b/proxmox-sys/src/lib.rs index 7e59058..8ea7073 100644 --- a/proxmox-sys/src/lib.rs +++ b/proxmox-sys/src/lib.rs @@ -1,5 +1,6 @@ use std::os::unix::ffi::OsStrExt; +pub mod boot_mode; pub mod command; #[cfg(feature = "crypt")] pub mod crypt; -- 2.39.2