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From: Patrick Steinhardt <ps@pks.im>
To: grub-devel@gnu.org
Cc: Denis GNUtoo Carikli <GNUtoo@cyberdimension.org>,
	Glenn Washburn <development@efficientek.com>,
	Daniel Kiper <daniel.kiper@oracle.com>
Subject: [PATCH v2 5/9] luks2: Improve error reporting when decrypting/verifying key
Date: Wed, 26 Aug 2020 10:13:44 +0200	[thread overview]
Message-ID: <7dbfad5683f1486044f477c5a5442af463251aa6.1598429170.git.ps@pks.im> (raw)
In-Reply-To: <cover.1598429170.git.ps@pks.im>

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While we already set up error messages in both `luks2_verify_key()` and
`luks2_decrypt_key()`, we do not ever print them. This makes it really
hard to discover why a given key actually failed to decrypt a disk.

Improve this by including the error message in the user-visible output.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
---
 grub-core/disk/luks2.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/grub-core/disk/luks2.c b/grub-core/disk/luks2.c
index 5f15a4d2c..26e1126b1 100644
--- a/grub-core/disk/luks2.c
+++ b/grub-core/disk/luks2.c
@@ -612,14 +612,16 @@ luks2_recover_key (grub_disk_t disk,
 			       (const grub_uint8_t *) passphrase, grub_strlen (passphrase));
       if (ret)
 	{
-	  grub_dprintf ("luks2", "Decryption with keyslot %"PRIuGRUB_SIZE" failed\n", i);
+	  grub_dprintf ("luks2", "Decryption with keyslot %"PRIuGRUB_SIZE" failed: %s\n",
+			i, grub_errmsg);
 	  continue;
 	}
 
       ret = luks2_verify_key (&digest, candidate_key, keyslot.key_size);
       if (ret)
 	{
-	  grub_dprintf ("luks2", "Could not open keyslot %"PRIuGRUB_SIZE"\n", i);
+	  grub_dprintf ("luks2", "Could not open keyslot %"PRIuGRUB_SIZE": %s\n",
+			i, grub_errmsg);
 	  continue;
 	}
 
-- 
2.28.0


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  parent reply	other threads:[~2020-08-26  8:11 UTC|newest]

Thread overview: 68+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-23 10:59 [PATCH 0/9] Cryptodisk fixes for v2.06 Patrick Steinhardt
2020-08-23 10:59 ` [PATCH 1/9] json: Remove invalid typedef redefinition Patrick Steinhardt
2020-08-23 10:59 ` [PATCH 2/9] luks: Fix out-of-bounds copy of UUID Patrick Steinhardt
2020-08-23 21:34   ` Denis 'GNUtoo' Carikli
2020-08-26  7:18     ` Patrick Steinhardt
2020-08-23 11:03 ` [PATCH 3/9] luks2: Fix use of incorrect index and some error messages Patrick Steinhardt
2020-08-24  6:30   ` Glenn Washburn
2020-08-24  6:33     ` Patrick Steinhardt
2020-08-23 11:03 ` [PATCH 4/9] luks2: grub_cryptodisk_t->total_length is the max number of device native sectors Patrick Steinhardt
2020-08-23 11:03 ` [PATCH 5/9] luks2: Improve error reporting when decrypting/verifying key Patrick Steinhardt
2020-08-23 11:03 ` [PATCH 6/9] cryptodisk: Unregister cryptomount command when removing module Patrick Steinhardt
2020-08-23 11:04 ` [PATCH 7/9] cryptodisk: Incorrect calculation of start sector for grub_disk_read in grub_cryptodisk_read Patrick Steinhardt
2020-08-23 11:04 ` [PATCH 8/9] cryptodisk: Fix cipher IV mode 'plain64' always being set as 'plain' Patrick Steinhardt
2020-08-23 11:04 ` [PATCH 9/9] cryptodisk: Properly handle non-512 byte sized sectors Patrick Steinhardt
2020-08-24  6:22 ` [PATCH 0/9] Cryptodisk fixes for v2.06 Glenn Washburn
2020-08-24  6:31   ` Patrick Steinhardt
2020-08-26  8:13 ` [PATCH v2 " Patrick Steinhardt
2020-08-26  8:13   ` [PATCH v2 1/9] json: Remove invalid typedef redefinition Patrick Steinhardt
2020-08-26  8:13   ` [PATCH v2 2/9] luks: Fix out-of-bounds copy of UUID Patrick Steinhardt
2020-08-26  8:13   ` [PATCH v2 3/9] luks2: Fix use of incorrect index and some error messages Patrick Steinhardt
2020-08-26  8:13   ` [PATCH v2 4/9] luks2: grub_cryptodisk_t->total_length is the max number of device native sectors Patrick Steinhardt
2020-08-26  8:13   ` Patrick Steinhardt [this message]
2020-08-26  8:13   ` [PATCH v2 6/9] cryptodisk: Unregister cryptomount command when removing module Patrick Steinhardt
2020-08-26 23:44     ` [PATCH] cryptodisk: Incorrect calculation of sector in grub_cryptodisk_read/write Glenn Washburn
2020-08-26 23:50       ` Glenn Washburn
2020-08-28  7:12         ` Patrick Steinhardt
2020-08-26  8:13   ` [PATCH v2 7/9] cryptodisk: Fix incorrect calculation of start sector Patrick Steinhardt
2020-08-26  8:13   ` [PATCH v2 8/9] cryptodisk: Fix cipher IV mode 'plain64' always being set as 'plain' Patrick Steinhardt
2020-08-26  8:14   ` [PATCH v2 9/9] cryptodisk: Properly handle non-512 byte sized sectors Patrick Steinhardt
2020-08-31 18:43     ` Glenn Washburn
2020-09-01 15:28       ` Patrick Steinhardt
2020-09-01 23:21     ` [PATCH] " Glenn Washburn
2020-09-02  0:01       ` Glenn Washburn
2020-09-07 15:28         ` Patrick Steinhardt
2020-08-26 22:16   ` [PATCH v2 0/9] Cryptodisk fixes for v2.06 Glenn Washburn
2020-08-28  7:17     ` Patrick Steinhardt
2020-09-07 15:27 ` [PATCH v3 " Patrick Steinhardt
2020-09-07 15:27   ` [PATCH v3 1/9] json: Remove invalid typedef redefinition Patrick Steinhardt
2020-09-07 15:27   ` [PATCH v3 2/9] luks: Fix out-of-bounds copy of UUID Patrick Steinhardt
2020-09-07 15:27   ` [PATCH v3 3/9] luks2: Fix use of incorrect index and some error messages Patrick Steinhardt
2020-09-08 12:58     ` Daniel Kiper
2020-09-21  6:45       ` Glenn Washburn
2020-09-21 11:24         ` Daniel Kiper
2020-09-07 15:27   ` [PATCH v3 4/9] luks2: grub_cryptodisk_t->total_length is the max number of device native sectors Patrick Steinhardt
2020-09-08 13:21     ` Daniel Kiper
2020-09-21  6:28       ` Glenn Washburn
2020-09-21 11:23         ` Daniel Kiper
2020-10-03  5:42           ` Glenn Washburn
2020-10-27 19:11             ` Daniel Kiper
2020-10-29 19:53               ` Glenn Washburn
2020-10-30 12:49                 ` Daniel Kiper
2020-11-03 20:21                   ` Glenn Washburn
2020-11-04 13:15                     ` Daniel Kiper
2020-11-06  6:41                       ` Glenn Washburn
2020-09-07 15:27   ` [PATCH v3 5/9] luks2: Improve error reporting when decrypting/verifying key Patrick Steinhardt
2020-09-07 15:27   ` [PATCH v3 6/9] cryptodisk: Unregister cryptomount command when removing module Patrick Steinhardt
2020-09-08 13:28     ` Daniel Kiper
2020-09-21  6:45       ` Glenn Washburn
2020-09-21 11:25         ` Daniel Kiper
2020-09-07 15:27   ` [PATCH v3 7/9] cryptodisk: Fix incorrect calculation of start sector Patrick Steinhardt
2020-09-07 15:28   ` [PATCH v3 8/9] cryptodisk: Fix cipher IV mode 'plain64' always being set as 'plain' Patrick Steinhardt
2020-09-08 13:42     ` Daniel Kiper
2020-09-07 15:28   ` [PATCH v3 9/9] cryptodisk: Properly handle non-512 byte sized sectors Patrick Steinhardt
2020-09-09 11:21     ` Daniel Kiper
2020-09-21  5:58       ` Glenn Washburn
2020-09-21 11:16         ` Daniel Kiper
2020-09-09 11:28   ` [PATCH v3 0/9] Cryptodisk fixes for v2.06 Daniel Kiper
2020-09-17 14:14   ` Patrick Steinhardt

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