[Bug 1858285] [NEW] SSH not honoring use of ~/.ssh/authorized_keys

[Timothy Yates]

Public bug reported:

Have tested this successfully on other distros, used the same steps to
updating /etc/ssh/sshd_config but SSH will not honor the use of
~/.ssh/authorized_keys.

Simple test

mkdir -m 700 ~/.ssh
cd ~/.ssh
ssh-keygen -t rsa -b 4096
press enter to accept the defaults and empty passphrase
cp id_rsa.pub authorized_keys

ssh localhost /bin/date
works

mv id-rsa $(hostname -s)
mv id-rsa.pub $(hostname -s).pub
ssh localhost /bin/date
**fails.  this works on CentOS, RHEL

ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: openssh-server 1:8.0p1-6build1
ProcVersionSignature: Ubuntu 5.3.0-1014.16-raspi2 5.3.10
Uname: Linux 5.3.0-1014-raspi2 aarch64
ApportVersion: 2.20.11-0ubuntu8.2
Architecture: arm64
Date: Sat Jan  4 12:42:58 2020
ExecutablePath: /usr/sbin/sshd
ProcEnviron:
 LANG=C.UTF-8
 PATH=(custom, no user)
SourcePackage: openssh
UpgradeStatus: No upgrade log present (probably fresh install)

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


** Tags: apport-bug arm64 eoan

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https://bugs.launchpad.net/bugs/1858285

Title:
  SSH not honoring use of ~/.ssh/authorized_keys

Status in openssh package in Ubuntu:
  New

Bug description:
  Have tested this successfully on other distros, used the same steps to
  updating /etc/ssh/sshd_config but SSH will not honor the use of
  ~/.ssh/authorized_keys.

  Simple test

  mkdir -m 700 ~/.ssh
  cd ~/.ssh
  ssh-keygen -t rsa -b 4096
  press enter to accept the defaults and empty passphrase
  cp id_rsa.pub authorized_keys

  ssh localhost /bin/date
  works

  mv id-rsa $(hostname -s)
  mv id-rsa.pub $(hostname -s).pub
  ssh localhost /bin/date
  **fails.  this works on CentOS, RHEL

  ProblemType: Bug
  DistroRelease: Ubuntu 19.10
  Package: openssh-server 1:8.0p1-6build1
  ProcVersionSignature: Ubuntu 5.3.0-1014.16-raspi2 5.3.10
  Uname: Linux 5.3.0-1014-raspi2 aarch64
  ApportVersion: 2.20.11-0ubuntu8.2
  Architecture: arm64
  Date: Sat Jan  4 12:42:58 2020
  ExecutablePath: /usr/sbin/sshd
  ProcEnviron:
   LANG=C.UTF-8
   PATH=(custom, no user)
  SourcePackage: openssh
  UpgradeStatus: No upgrade log present (probably fresh install)

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