[Bug 2048681] [NEW] cryptdisks_start will not read a passphrase from stdin

[EML]

Public bug reported:

Is this the intended behaviour? cryptdisks_start can't be used for
scripting because it won't accept the passphrase from stdin:

# key=foo
# echo $key | cryptdisks_start cdata 
 * Starting crypto disk...                                                                                                 * cdata (starting)...                                                                                                  Nothing to read on input.

OTOH, 'cryptsetup open' *does* read a passphrase from stdin:

if ! output=$(echo "$key" | cryptsetup open /dev/mapper/vg0-data cdata 2>&1); then
   echo "'cryptsetup open' failed ($output)"
   exit 1
fi

I'm thinking that the user-friendly version of 'cryptsetup open' should
perhaps also do this.

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: cryptsetup 2:2.4.3-1ubuntu1.2
ProcVersionSignature: Ubuntu 5.15.0-91.101-generic 5.15.131
Uname: Linux 5.15.0-91-generic x86_64
ApportVersion: 2.20.11-0ubuntu82.5
Architecture: amd64
CasperMD5CheckResult: pass
Date: Mon Jan  8 18:11:10 2024
InstallationDate: Installed on 2023-12-24 (15 days ago)
InstallationMedia: Ubuntu-Server 22.04.3 LTS "Jammy Jellyfish" - Release amd64 (20230810)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: cryptsetup
UpgradeStatus: No upgrade log present (probably fresh install)
cmdline: BOOT_IMAGE=/vmlinuz-5.15.0-91-generic root=/dev/mapper/vg0-root ro
crypttab:
 # <target name>	<source device>		<key file>	<options>
 cswap /dev/mapper/vg0-swap /dev/urandom swap,plain,cipher=aes-xts-plain64,size=256,hash=sha256
 cdata /dev/mapper/vg0-data none         noauto,luks,check=blkid,checkargs=ext4,tries=10

** Affects: cryptsetup (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug jammy

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to cryptsetup in Ubuntu.
https://bugs.launchpad.net/bugs/2048681

Title:
  cryptdisks_start will not read a passphrase from stdin

Status in cryptsetup package in Ubuntu:
  New

Bug description:
  Is this the intended behaviour? cryptdisks_start can't be used for
  scripting because it won't accept the passphrase from stdin:

  # key=foo
  # echo $key | cryptdisks_start cdata 
   * Starting crypto disk...                                                                                                 * cdata (starting)...                                                                                                  Nothing to read on input.

  OTOH, 'cryptsetup open' *does* read a passphrase from stdin:

  if ! output=$(echo "$key" | cryptsetup open /dev/mapper/vg0-data cdata 2>&1); then
     echo "'cryptsetup open' failed ($output)"
     exit 1
  fi

  I'm thinking that the user-friendly version of 'cryptsetup open'
  should perhaps also do this.

  ProblemType: Bug
  DistroRelease: Ubuntu 22.04
  Package: cryptsetup 2:2.4.3-1ubuntu1.2
  ProcVersionSignature: Ubuntu 5.15.0-91.101-generic 5.15.131
  Uname: Linux 5.15.0-91-generic x86_64
  ApportVersion: 2.20.11-0ubuntu82.5
  Architecture: amd64
  CasperMD5CheckResult: pass
  Date: Mon Jan  8 18:11:10 2024
  InstallationDate: Installed on 2023-12-24 (15 days ago)
  InstallationMedia: Ubuntu-Server 22.04.3 LTS "Jammy Jellyfish" - Release amd64 (20230810)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  SourcePackage: cryptsetup
  UpgradeStatus: No upgrade log present (probably fresh install)
  cmdline: BOOT_IMAGE=/vmlinuz-5.15.0-91-generic root=/dev/mapper/vg0-root ro
  crypttab:
   # <target name>	<source device>		<key file>	<options>
   cswap /dev/mapper/vg0-swap /dev/urandom swap,plain,cipher=aes-xts-plain64,size=256,hash=sha256
   cdata /dev/mapper/vg0-data none         noauto,luks,check=blkid,checkargs=ext4,tries=10

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/cryptsetup/+bug/2048681/+subscriptions