Greetings, I have enabled module signature verification on my kernel, and it does seem to be enabled upon boot:
$ dmesg | grep -i 'x.*509' [ 1.259988] Asymmetric key parser 'x509' registered [ 1.811026] Loading compiled-in X.509 certificates [ 1.813833] Loaded X.509 cert 'Build time autogenerated kernel key: 77e716fc52a6293567d953cd24a5977e55b41a5e' and doing a cat /proc/keys seems to show the key enabled: $ cat /proc/keys ... 37c67374 I------ 1 perm 1f030000 0 0 asymmetri Build time autogenerated kernel key: 77e716fc52a6293567d953cd24a5977e55b41a5e: X509.rsa 55b41a5e [] ... However, if I do a modinfo to see the key on a module, it seems empty: $modinfo ntfs filename: /lib/modules/4.9.76-gentoo-r1/kernel/fs/ntfs/ntfs.ko license: GPL version: 2.1.32 description: NTFS 1.2/3.x driver - Copyright (c) 2001-2014 Anton Altaparmakov and Tuxera Inc. author: Anton Altaparmakov <[email protected]> alias: fs-ntfs srcversion: 0D7ACE93F603E9350827FB8 depends: intree: Y vermagic: 4.9.76-gentoo-r1 SMP mod_unload signat: PKCS#7 signer: sig_key: sig_hashalgo: md4 And hex dump does show me the digital signature appended at the end: $ hexdump -C /lib64/modules/4.9.76-gentoo-r1/kernel/fs/ntfs/ntfs.ko| tail 0004e8c0 e3 dd 54 9d 5e f1 1a 12 56 47 4e 54 91 b9 fa ce |..T.^...VGNT....| 0004e8d0 e6 01 db 37 eb 83 f3 77 10 f0 b5 f8 11 fd 4e 86 |...7...w......N.| 0004e8e0 6c 81 8a 61 c2 15 6d 5a 35 93 8b 33 c0 32 2f e4 |l..a..mZ5..3.2/.| 0004e8f0 8c 15 71 de c8 c5 39 58 cc e8 65 e1 be 36 e6 02 |..q...9X..e..6..| 0004e900 b0 75 b5 a2 73 d8 4d 22 e7 2f 53 1f 42 fb ee 58 |.u..s.M"./S.B..X| 0004e910 f2 65 44 13 26 30 7b 31 1c 58 12 5a f2 5d b1 45 |.eD.&0{1.X.Z.].E| 0004e920 3a f0 a5 79 74 f4 00 00 02 00 00 00 00 00 00 00 |:..yt...........| 0004e930 02 9e 7e 4d 6f 64 75 6c 65 20 73 69 67 6e 61 74 |..~Module signat| 0004e940 75 72 65 20 61 70 70 65 6e 64 65 64 7e 0a |ure appended~.| 0004e94e My question is: why doesn't modinfo show me the key fingerprint? -- Kind regards, Met een vriendelijke groet, Ben Mezger https://seds.nl PGP: C473 DDC9 D1B1 40AF 2051 1CF6 18C4 6052 1688 92F7
