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From: "Fabian Grünbichler" <f.gruenbichler@proxmox.com>
To: pbs-devel@lists.proxmox.com
Subject: [pbs-devel] [PATCH proxmox-backup 06/13] manifest: check fingerprint when loading with key
Date: Fri, 20 Nov 2020 17:38:36 +0100	[thread overview]
Message-ID: <20201120163845.1225080-7-f.gruenbichler@proxmox.com> (raw)
In-Reply-To: <20201120163845.1225080-1-f.gruenbichler@proxmox.com>

otherwise loading will run into the signature mismatch which is
technically true, but not the complete picture in this case.

Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
---
 src/backup/manifest.rs | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/backup/manifest.rs b/src/backup/manifest.rs
index 00dafbd6..a64cbe15 100644
--- a/src/backup/manifest.rs
+++ b/src/backup/manifest.rs
@@ -273,6 +273,19 @@ impl BackupManifest {
         if let Some(ref crypt_config) = crypt_config {
             if let Some(signature) = signature {
                 let expected_signature = proxmox::tools::digest_to_hex(&Self::json_signature(&json, crypt_config)?);
+
+                let fingerprint = &json["unprotected"]["key-fingerprint"];
+                if fingerprint != &Value::Null {
+                    let fingerprint = serde_json::from_value(fingerprint.clone())?;
+                    let config_fp = crypt_config.fingerprint();
+                    if config_fp != fingerprint {
+                        bail!(
+                            "wrong key - unable to verify signature since manifest's key {} does not match provided key {}",
+                            fingerprint,
+                            config_fp
+                        );
+                    }
+                }
                 if signature != expected_signature {
                     bail!("wrong signature in manifest");
                 }
-- 
2.20.1





  parent reply	other threads:[~2020-11-20 16:40 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-20 16:38 [pbs-devel] [PATCH v2 proxmox-backup(-qemu) 00/15] add, persist and check fingerprint Fabian Grünbichler
2020-11-20 16:38 ` [pbs-devel] [PATCH proxmox-backup 01/13] crypt config: add fingerprint mechanism Fabian Grünbichler
2020-11-20 16:38 ` [pbs-devel] [PATCH proxmox-backup 02/13] key: add fingerprint to key config Fabian Grünbichler
2020-11-23  8:07   ` Wolfgang Bumiller
2020-11-20 16:38 ` [pbs-devel] [PATCH proxmox-backup 03/13] client: print key fingerprint and master key Fabian Grünbichler
2020-11-20 16:38 ` [pbs-devel] [PATCH proxmox-backup 04/13] client: add 'key show' command Fabian Grünbichler
2020-11-20 16:38 ` [pbs-devel] [PATCH proxmox-backup 05/13] fix #3139: add key fingerprint to manifest Fabian Grünbichler
2020-11-20 16:38 ` Fabian Grünbichler [this message]
2020-11-20 16:38 ` [pbs-devel] [PATCH proxmox-backup 07/13] client: check fingerprint after downloading manifest Fabian Grünbichler
2020-11-20 16:38 ` [pbs-devel] [PATCH proxmox-backup 08/13] paperkey: refactor common code Fabian Grünbichler
2020-11-20 16:38 ` [pbs-devel] [PATCH proxmox-backup 09/13] paperkey: add short key ID to subject Fabian Grünbichler
2020-11-23  7:07   ` Dietmar Maurer
2020-11-23  8:16     ` Fabian Grünbichler
2020-11-23  8:30       ` Dietmar Maurer
2020-11-23  8:47         ` Fabian Grünbichler
2020-11-23  8:41       ` Dietmar Maurer
2020-11-23  8:55       ` Dietmar Maurer
2020-11-23  9:44         ` Fabian Grünbichler
2020-11-20 16:38 ` [pbs-devel] [RFC proxmox-backup 10/13] expose previous backup time in backup env Fabian Grünbichler
2020-11-20 16:38 ` [pbs-devel] [PATCH proxmox-backup 11/13] refactor BackupInfo -> SnapshotListItem helper Fabian Grünbichler
2020-11-20 16:38 ` [pbs-devel] [PATCH proxmox-backup 12/13] list_snapshots: return manifest fingerprint Fabian Grünbichler
2020-11-20 16:38 ` [pbs-devel] [PATCH proxmox-backup 13/13] gui: add snapshot/file fingerprint tooltip Fabian Grünbichler
2020-11-20 16:38 ` [pbs-devel] [PATCH proxmox-backup-qemu 1/2] adapt to proxmox-backup fingerprint changes Fabian Grünbichler
2020-11-24  8:07   ` [pbs-devel] applied: " Dietmar Maurer
2020-11-20 16:38 ` [pbs-devel] [PATCH proxmox-backup-qemu 2/2] restore: improve error if key is missing Fabian Grünbichler
2020-11-24  7:47 ` [pbs-devel] [PATCH v2 proxmox-backup(-qemu) 00/15] add, persist and check fingerprint Dietmar Maurer

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