Merge pull request #6732 from oconnorr/master
Use mktemp to create temporary files to hold ssh host keys and authorized keys
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commit
0666ee4739
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@ -137,40 +137,50 @@ in
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after = [ "network-online.target" "ip-up.target" ];
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wants = [ "network-online.target" "ip-up.target" ];
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script = let wget = "${pkgs.wget}/bin/wget --retry-connrefused -t 15 --waitretry=10 --header='Metadata-Flavor: Google'"; in
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script = let wget = "${pkgs.wget}/bin/wget --retry-connrefused -t 15 --waitretry=10 --header='Metadata-Flavor: Google'";
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mktemp = "mktemp --tmpdir=/run"; in
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''
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# When dealing with cryptographic keys, we want to keep things private.
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umask 077
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# Don't download the SSH key if it has already been downloaded
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if ! [ -e /root/.ssh/authorized_keys ]; then
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echo "obtaining SSH key..."
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mkdir -m 0700 -p /root/.ssh
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${wget} -O /root/authorized-keys-metadata http://metadata.google.internal/0.1/meta-data/authorized-keys
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if [ $? -eq 0 -a -e /root/authorized-keys-metadata ]; then
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cat /root/authorized-keys-metadata | cut -d: -f2- > /root/key.pub
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if ! grep -q -f /root/key.pub /root/.ssh/authorized_keys; then
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cat /root/key.pub >> /root/.ssh/authorized_keys
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echo "new key added to authorized_keys"
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fi
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chmod 600 /root/.ssh/authorized_keys
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fi
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rm -f /root/key.pub /root/authorized-keys-metadata
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if ! [ -s /root/.ssh/authorized_keys ]; then
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echo "obtaining SSH key..."
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mkdir -m 0700 -p /root/.ssh
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AUTH_KEYS=$(${mktemp})
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${wget} -O $AUTH_KEYS http://metadata.google.internal/0.1/meta-data/authorized-keys
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if [ -s $AUTH_KEYS ]; then
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KEY_PUB=$(${mktemp})
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cat $AUTH_KEYS | cut -d: -f2- > $KEY_PUB
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if ! grep -q -f $KEY_PUB /root/.ssh/authorized_keys; then
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cat $KEY_PUB >> /root/.ssh/authorized_keys
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echo "New key added to authorized_keys."
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fi
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chmod 600 /root/.ssh/authorized_keys
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rm -f $KEY_PUB
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else
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echo "Downloading http://metadata.google.internal/0.1/meta-data/authorized-keys failed."
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false
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fi
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rm -f $AUTH_KEYS
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fi
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countKeys=0
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${flip concatMapStrings config.services.openssh.hostKeys (k :
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let kName = baseNameOf k.path; in ''
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PRIV_KEY=$(${mktemp})
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echo "trying to obtain SSH private host key ${kName}"
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${wget} -O /root/${kName} http://metadata.google.internal/0.1/meta-data/attributes/${kName} && :
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if [ $? -eq 0 -a -e /root/${kName} ]; then
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${wget} -O $PRIV_KEY http://metadata.google.internal/0.1/meta-data/attributes/${kName} && :
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if [ $? -eq 0 -a -s $PRIV_KEY ]; then
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countKeys=$((countKeys+1))
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mv -f /root/${kName} ${k.path}
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echo "downloaded ${k.path}"
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mv -f $PRIV_KEY ${k.path}
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echo "Downloaded ${k.path}"
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chmod 600 ${k.path}
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${config.programs.ssh.package}/bin/ssh-keygen -y -f ${k.path} > ${k.path}.pub
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chmod 644 ${k.path}.pub
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else
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echo "Downloading http://metadata.google.internal/0.1/meta-data/attributes/${kName} failed."
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fi
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rm -f /root/${kName}
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rm -f $PRIV_KEY
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''
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)}
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