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virtualization
linux
microvm
firecracker
Merge pull request #12 from tsirysndr/feat/detect-updated-ssh-keys
feat: add SSH key change detection and image regeneration for rootfs preparations
authored by
Tsiry Sandratraina
and committed by
GitHub
1df37615
b8a4c4f8
+141
-14
+1
Cargo.lock
+1
Cargo.lock
+1
crates/firecracker-prepare/Cargo.toml
+1
crates/firecracker-prepare/Cargo.toml
+139
-14
crates/firecracker-prepare/src/lib.rs
+139
-14
crates/firecracker-prepare/src/lib.rs
···
3
3
use anyhow::Result;
4
4
use owo_colors::OwoColorize;
5
5
use serde::{Deserialize, Serialize};
6
+
use sha2::{Digest, Sha256};
6
7
7
8
use crate::{
8
9
command::{run_command, run_command_with_stdout_inherit},
···
212
213
&["-p", &format!("{}/root/.ssh", debootstrap_dir)],
213
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true,
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215
)?;
216
+
217
+
let img_file = format!("{}/debian-rootfs.img", app_dir);
218
+
if ssh_keys_changed(
219
+
&ssh_keys,
220
+
&format!("{}/root/.ssh/authorized_keys", debootstrap_dir),
221
+
)? {
222
+
println!("[+] SSH keys have changed, removing existing image to regenerate.");
223
+
run_command("rm", &["-f", &img_file], true)?;
224
+
}
225
+
215
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match ssh_keys {
216
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Some(ref keys) => ssh::copy_ssh_keys(keys, &debootstrap_dir)?,
217
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None => ssh::generate_and_copy_ssh_key(&ssh_key_name, &debootstrap_dir)?,
···
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)?;
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}
246
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247
-
let img_file = format!("{}/debian-rootfs.img", app_dir);
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rootfs::create_overlay_dirs(&debootstrap_dir)?;
249
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rootfs::add_overlay_init(&debootstrap_dir)?;
250
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rootfs::create_squashfs(&debootstrap_dir, &img_file)?;
···
380
390
true,
381
391
)?;
382
392
393
+
let img_file = format!("{}/alpine-rootfs.img", app_dir);
394
+
if ssh_keys_changed(
395
+
&ssh_keys,
396
+
&format!("{}/root/.ssh/authorized_keys", minirootfs),
397
+
)? {
398
+
println!("[+] SSH keys have changed, removing existing image to regenerate.");
399
+
run_command("rm", &["-f", &img_file], true)?;
400
+
}
401
+
383
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let ssh_key_name = "id_rsa";
384
403
match ssh_keys {
385
404
Some(ref keys) => ssh::copy_ssh_keys(keys, &minirootfs)?,
386
405
None => ssh::generate_and_copy_ssh_key(&ssh_key_name, &minirootfs)?,
387
406
}
388
407
389
-
let img_file = format!("{}/alpine-rootfs.img", app_dir);
390
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rootfs::create_squashfs(&minirootfs, &img_file)?;
391
409
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let ssh_key_file = match ssh_keys {
···
448
466
true,
449
467
)?;
450
468
469
+
let img_file = format!("{}/ubuntu-rootfs.img", app_dir);
470
+
if ssh_keys_changed(
471
+
&ssh_keys,
472
+
&format!("{}/root/.ssh/authorized_keys", squashfs_root_dir),
473
+
)? {
474
+
println!("[+] SSH keys have changed, removing existing image to regenerate.");
475
+
run_command("rm", &["-f", &img_file], true)?;
476
+
}
477
+
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let ssh_key_name = "id_rsa";
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match ssh_keys {
453
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Some(ref keys) => ssh::copy_ssh_keys(keys, &squashfs_root_dir)?,
454
481
None => ssh::generate_and_copy_ssh_key(&ssh_key_name, &squashfs_root_dir)?,
455
482
}
456
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457
-
let img_file = format!("{}/ubuntu-rootfs.img", app_dir);
458
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rootfs::create_overlay_dirs(&squashfs_root_dir)?;
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rootfs::add_overlay_init(&squashfs_root_dir)?;
460
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rootfs::create_squashfs(&squashfs_root_dir, &img_file)?;
···
495
521
downloader::download_nixos_rootfs(arch)?;
496
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rootfs::extract_squashfs(&squashfs_file, &nixos_rootfs)?;
497
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524
+
let img_file = format!("{}/nixos-rootfs.img", app_dir);
525
+
if ssh_keys_changed(
526
+
&ssh_keys,
527
+
&format!("{}/root/.ssh/authorized_keys", nixos_rootfs),
528
+
)? {
529
+
println!("[+] SSH keys have changed, removing existing image to regenerate.");
530
+
run_command("rm", &["-f", &img_file], true)?;
531
+
}
532
+
498
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let ssh_key_name = "id_rsa";
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match ssh_keys {
500
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Some(ref keys) => ssh::copy_ssh_keys(keys, &nixos_rootfs)?,
501
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None => ssh::generate_and_copy_ssh_key(&ssh_key_name, &nixos_rootfs)?,
502
537
}
503
538
504
-
let img_file = format!("{}/nixos-rootfs.img", app_dir);
505
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rootfs::create_squashfs(&nixos_rootfs, &img_file)?;
506
540
507
541
let ssh_key_file = match ssh_keys {
···
547
581
downloader::download_fedora_rootfs(arch)?;
548
582
rootfs::extract_squashfs(&squashfs_file, &fedora_rootfs)?;
549
583
584
+
let img_file = format!("{}/fedora-rootfs.img", app_dir);
585
+
if ssh_keys_changed(
586
+
&ssh_keys,
587
+
&format!("{}/root/.ssh/authorized_keys", fedora_rootfs),
588
+
)? {
589
+
println!("[+] SSH keys have changed, removing existing image to regenerate.");
590
+
run_command("rm", &["-f", &img_file], true)?;
591
+
}
592
+
550
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run_command(
551
594
"chroot",
552
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&[&fedora_rootfs, "systemctl", "enable", "sshd"],
···
559
602
None => ssh::generate_and_copy_ssh_key(&ssh_key_name, &fedora_rootfs)?,
560
603
}
561
604
562
-
let img_file = format!("{}/fedora-rootfs.img", app_dir);
563
605
rootfs::create_squashfs(&fedora_rootfs, &img_file)?;
564
606
565
607
let ssh_key_file = match ssh_keys {
···
613
655
true,
614
656
)?;
615
657
658
+
let img_file = format!("{}/gentoo-rootfs.img", app_dir);
659
+
if ssh_keys_changed(
660
+
&ssh_keys,
661
+
&format!("{}/root/.ssh/authorized_keys", gentoo_rootfs),
662
+
)? {
663
+
println!("[+] SSH keys have changed, removing existing image to regenerate.");
664
+
run_command("rm", &["-f", &img_file], true)?;
665
+
}
666
+
616
667
let ssh_key_name = "id_rsa";
617
668
match ssh_keys {
618
669
Some(ref keys) => ssh::copy_ssh_keys(keys, &gentoo_rootfs)?,
619
670
None => ssh::generate_and_copy_ssh_key(&ssh_key_name, &gentoo_rootfs)?,
620
671
}
621
672
622
-
let img_file = format!("{}/gentoo-rootfs.img", app_dir);
623
673
rootfs::create_squashfs(&gentoo_rootfs, &img_file)?;
624
674
625
675
let ssh_key_file = match ssh_keys {
···
660
710
downloader::download_slackware_rootfs(arch)?;
661
711
rootfs::extract_squashfs(&squashfs_file, &slackware_rootfs)?;
662
712
713
+
let img_file = format!("{}/slackware-rootfs.img", app_dir);
714
+
if ssh_keys_changed(
715
+
&ssh_keys,
716
+
&format!("{}/root/.ssh/authorized_keys", slackware_rootfs),
717
+
)? {
718
+
println!("[+] SSH keys have changed, removing existing image to regenerate.");
719
+
run_command("rm", &["-f", &img_file], true)?;
720
+
}
721
+
663
722
run_command(
664
723
"chroot",
665
724
&[
···
678
737
None => ssh::generate_and_copy_ssh_key(&ssh_key_name, &slackware_rootfs)?,
679
738
}
680
739
681
-
let img_file = format!("{}/slackware-rootfs.img", app_dir);
682
740
rootfs::create_squashfs(&slackware_rootfs, &img_file)?;
683
741
684
742
let ssh_key_file = match ssh_keys {
···
719
777
downloader::download_opensuse_rootfs(arch)?;
720
778
rootfs::extract_squashfs(&squashfs_file, &opensuse_rootfs)?;
721
779
780
+
let img_file = format!("{}/opensuse-rootfs.img", app_dir);
781
+
if ssh_keys_changed(
782
+
&ssh_keys,
783
+
&format!("{}/root/.ssh/authorized_keys", opensuse_rootfs),
784
+
)? {
785
+
println!("[+] SSH keys have changed, removing existing image to regenerate.");
786
+
run_command("rm", &["-f", &img_file], true)?;
787
+
}
788
+
722
789
run_command(
723
790
"chroot",
724
791
&[&opensuse_rootfs, "systemctl", "enable", "sshd"],
···
731
798
None => ssh::generate_and_copy_ssh_key(&ssh_key_name, &opensuse_rootfs)?,
732
799
}
733
800
734
-
let img_file = format!("{}/opensuse-rootfs.img", app_dir);
735
801
rootfs::create_squashfs(&opensuse_rootfs, &img_file)?;
736
802
737
803
let ssh_key_file = match ssh_keys {
···
772
838
downloader::download_almalinux_rootfs(arch)?;
773
839
rootfs::extract_squashfs(&squashfs_file, &almalinux_rootfs)?;
774
840
841
+
let img_file = format!("{}/almalinux-rootfs.img", app_dir);
842
+
if ssh_keys_changed(
843
+
&ssh_keys,
844
+
&format!("{}/root/.ssh/authorized_keys", almalinux_rootfs),
845
+
)? {
846
+
println!("[+] SSH keys have changed, removing existing image to regenerate.");
847
+
run_command("rm", &["-f", &img_file], true)?;
848
+
}
849
+
775
850
let ssh_key_name = "id_rsa";
776
851
match ssh_keys {
777
852
Some(ref keys) => ssh::copy_ssh_keys(keys, &almalinux_rootfs)?,
778
853
None => ssh::generate_and_copy_ssh_key(&ssh_key_name, &almalinux_rootfs)?,
779
854
}
780
855
781
-
let img_file = format!("{}/almalinux-rootfs.img", app_dir);
782
856
rootfs::create_squashfs(&almalinux_rootfs, &img_file)?;
783
857
784
858
let ssh_key_file = match ssh_keys {
···
819
893
downloader::download_rockylinux_rootfs(arch)?;
820
894
rootfs::extract_squashfs(&squashfs_file, &rockylinux_rootfs)?;
821
895
896
+
let img_file = format!("{}/rockylinux-rootfs.img", app_dir);
897
+
if ssh_keys_changed(
898
+
&ssh_keys,
899
+
&format!("{}/root/.ssh/authorized_keys", rockylinux_rootfs),
900
+
)? {
901
+
println!("[+] SSH keys have changed, removing existing image to regenerate.");
902
+
run_command("rm", &["-f", &img_file], true)?;
903
+
}
904
+
822
905
let ssh_key_name = "id_rsa";
823
906
match ssh_keys {
824
907
Some(ref keys) => ssh::copy_ssh_keys(keys, &rockylinux_rootfs)?,
825
908
None => ssh::generate_and_copy_ssh_key(&ssh_key_name, &rockylinux_rootfs)?,
826
909
}
827
-
828
-
let img_file = format!("{}/rockylinux-rootfs.img", app_dir);
829
910
rootfs::create_squashfs(&rockylinux_rootfs, &img_file)?;
830
911
831
912
let ssh_key_file = match ssh_keys {
···
865
946
downloader::download_archlinux_rootfs(arch)?;
866
947
rootfs::extract_squashfs(&squashfs_file, &archlinux_rootfs)?;
867
948
949
+
let img_file = format!("{}/archlinux-rootfs.img", app_dir);
950
+
if ssh_keys_changed(
951
+
&ssh_keys,
952
+
&format!("{}/root/.ssh/authorized_keys", archlinux_rootfs),
953
+
)? {
954
+
println!("[+] SSH keys have changed, removing existing image to regenerate.");
955
+
run_command("rm", &["-f", &img_file], true)?;
956
+
}
957
+
868
958
run_command(
869
959
"chroot",
870
960
&[&archlinux_rootfs, "systemctl", "enable", "sshd"],
···
881
971
Some(ref keys) => ssh::copy_ssh_keys(keys, &archlinux_rootfs)?,
882
972
None => ssh::generate_and_copy_ssh_key(&ssh_key_name, &archlinux_rootfs)?,
883
973
}
884
-
885
-
let img_file = format!("{}/archlinux-rootfs.img", app_dir);
886
974
887
975
rootfs::create_squashfs(&archlinux_rootfs, &img_file)?;
888
976
···
924
1012
downloader::download_opensuse_tumbleweed_rootfs(arch)?;
925
1013
rootfs::extract_squashfs(&squashfs_file, &opensuse_rootfs)?;
926
1014
1015
+
let img_file = format!("{}/opensuse-tumbleweed-rootfs.img", app_dir);
1016
+
if ssh_keys_changed(
1017
+
&ssh_keys,
1018
+
&format!("{}/root/.ssh/authorized_keys", opensuse_rootfs),
1019
+
)? {
1020
+
println!("[+] SSH keys have changed, removing existing image to regenerate.");
1021
+
run_command("rm", &["-f", &img_file], true)?;
1022
+
}
1023
+
927
1024
run_command(
928
1025
"chroot",
929
1026
&[&opensuse_rootfs, "systemctl", "enable", "sshd"],
···
937
1034
None => ssh::generate_and_copy_ssh_key(&ssh_key_name, &opensuse_rootfs)?,
938
1035
}
939
1036
940
-
let img_file = format!("{}/opensuse-tumbleweed-rootfs.img", app_dir);
941
1037
rootfs::create_squashfs(&opensuse_rootfs, &img_file)?;
942
1038
943
1039
let ssh_key_file = match ssh_keys {
···
948
1044
Ok((kernel_file, img_file, ssh_key_file))
949
1045
}
950
1046
}
1047
+
1048
+
fn ssh_keys_changed(ssh_keys: &Option<Vec<String>>, authorized_keys_path: &str) -> Result<bool> {
1049
+
if ssh_keys.is_none() {
1050
+
return Ok(false);
1051
+
}
1052
+
let ssh_keys = ssh_keys.as_ref().unwrap();
1053
+
let mut hasher = Sha256::new();
1054
+
let ssh_keys_str = ssh_keys.join("\n");
1055
+
1056
+
let ssh_keys_str = match ssh_keys_str.ends_with('\n') {
1057
+
true => ssh_keys_str,
1058
+
false => format!("{}\n", ssh_keys_str),
1059
+
};
1060
+
1061
+
hasher.update(ssh_keys_str.as_bytes());
1062
+
let ssh_keys_hash = hasher.finalize();
1063
+
1064
+
if !run_command("test", &["-e", authorized_keys_path], true).is_ok() {
1065
+
return Ok(true);
1066
+
}
1067
+
1068
+
let output = run_command("cat", &[authorized_keys_path], true)?;
1069
+
let authorized_keys_content = String::from_utf8_lossy(&output.stdout);
1070
+
let mut hasher = Sha256::new();
1071
+
hasher.update(authorized_keys_content.as_bytes());
1072
+
let authorized_keys_hash = hasher.finalize();
1073
+
1074
+
Ok(ssh_keys_hash != authorized_keys_hash)
1075
+
}