486 lines
10 KiB
Bash
486 lines
10 KiB
Bash
#!/bin/bash
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#IDM_MOD_SSH_DEPS="s0 id gpg"
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# trap 'idm_ssh_kill' 0
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## SSH functions
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##########################################
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idm_ssh__help ()
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{
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echo "Secure Shell"
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printf " %-20s: %s\n" "ssh ls" "List unlocked keys"
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printf " %-20s: %s\n" "ssh pub" "Show public keys"
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printf " %-20s: %s\n" "ssh tree" "Show keypairs tree"
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printf " %-20s: %s\n" "ssh new [dir]" "Create new ssh key dest dir"
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printf " %-20s: %s\n" "ssh add" "Unlock known keypairs"
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printf " %-20s: %s\n" "ssh rm" "Lock known keypairs"
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printf " %-20s: %s\n" "ssh del" "Delete keypair"
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printf " %-20s: %s\n" "ssh enable" "Enable agent"
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printf " %-20s: %s\n" "ssh disable" "Disable agent"
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printf " %-20s: %s\n" "ssh kill" "Kill agent"
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cat <<EOF
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Documentation:
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You can create a new ssh key with the assistant:
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i ssh new
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The you can add this key to your agent, it will ask you your key password:
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i ssh add
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If you want to kill the agent:
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i ssh rm
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If you want to delete your key files, simply run:
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i ssh rm
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EOF
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}
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idm_ssh ()
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{
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# Argument maangement
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if [ "$#" -eq 1 ]; then
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local id=$1
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idm_ssh__ls $id
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return 0
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else
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local action=$1
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local id=$2
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shift 2 || true
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local opt=${@-}
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fi
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# Internal override case
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# Fallback to command
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idm_ssh__help
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return 1
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}
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## Required functions
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##########################################
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idm_ssh__ls ()
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{
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local id=$1
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local opt=${2:--l}
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lib_id_is_enabled $id || return 0
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{ ssh-add $opt || true ; } 2>/dev/null | sed 's/^/ /'
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}
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idm_ssh__disable ()
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{
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local id=$1
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#lib_id_is_enabled $id
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lib_id_has_config $id
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# Return portion of code to clean
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echo "unset SSH_AUTH_SOCK SSH_AGENT_PID"
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}
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idm_ssh__enable ()
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{
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local id=$1
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lib_id_has_config $id
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# Source environment
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if [ -f "${XDG_RUNTIME_DIR}/ssh-agent/${id}/env" ] ; then
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. "${XDG_RUNTIME_DIR}/ssh-agent/${id}/env"
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else
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unset SSH_AUTH_SOCK SSH_AGENT_PID
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fi
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# Check status
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if ! idm_ssh__is_agent_working $id ${SSH_AUTH_SOCK:-_} ${SSH_AGENT_PID:-0}; then
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if ! idm_ssh__agent_start $id; then
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lib_log WARN "Could not start ssh agent :("
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return 1
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fi
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fi
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# Display config to load
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cat "${XDG_RUNTIME_DIR}/ssh-agent/${id}/env"
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}
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# LOGOUT
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idm_ssh__kill ()
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{
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#set -x
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local id=$1
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local run_dir="${XDG_RUNTIME_DIR}/ssh-agent/${id}"
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lib_id_is_enabled $id
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#lib_log NOTICE "Cleaning ssh-agent ..."
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[ -z "${SSH_AGENT_PID-}" ] && \
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[ -f "$run_dir/env" ] && \
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. "$run_dir/env"
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# Clean ssh-agent process
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if kill -0 ${SSH_AGENT_PID-} &>/dev/null; then
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/usr/bin/ssh-agent -k >/dev/null
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lib_log NOTICE "Kill ssh-agent ..."
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fi
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#eval "$(/usr/bin/ssh-agent -k 2>/dev/null)"
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# Clean ssh-agent env file
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[ ! -f "${XDG_RUNTIME_DIR}/ssh-agent/${id}/env" ] || \
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rm "${XDG_RUNTIME_DIR}/ssh-agent/${id}/env"
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# Disable agent
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idm_ssh__disable $id
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set +x
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}
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## Extra functions
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##########################################
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idm_ssh__tree ()
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{
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local id=$1
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if lib_id_has_config $id &>/dev/null; then
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tree -C "$HOME/.ssh/$id"
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else
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tree -C "$HOME/.ssh/"
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fi
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}
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idm_ssh__pub ()
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{
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local id=$1
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local path="$HOME/.ssh"
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if lib_id_has_config $id &>/dev/null; then
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path="$HOME/.ssh/$id"
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fi
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head -n 3 "$path"/*.pub
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}
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idm_ssh__new ()
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{
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local id=${1-}
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local dest=${2-}
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local default=
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local key_vers=
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local key_user=
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local key_host=
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local key_sizes=
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local key_vers="$(date +'%Y%m%d')"
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#set -x
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# Guess defaults
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default=$(id -un)
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if lib_id_has_config $id &>/dev/null; then
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default=${login:-$id}
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if [ -z "$dest" ]; then
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dest="$HOME/.ssh/$id"
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fi
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else
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dest=${dest:-.}
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fi
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mkdir -p "$dest"
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echo "INFO: Key destination dir: $dest"
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# Login
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while ! grep -q '\w\+' <<< "$key_user"; do
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read -rp "> Username [$default]: " ans
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key_user="${ans:-$default}"
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done
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# Host name
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default="${hostname:-$(hostname -f)}"
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while ! grep -q '[a-zA-Z0-9.-]\+' <<< "$key_host"; do
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read -rp "> Hostname [$default]: " ans
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#echo ""
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key_host="${ans:-$default}"
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done
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# Keys sizes
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default="ns"
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echo "Please choose key types:"
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echo "n) ed25519 strongest, fast"
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echo "s) rsa4096 most compatible, slow"
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echo "o) rsa2048 old compatility"
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while ! grep -q '[nso]\+' <<< "$key_sizes"; do
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echo -n "> Key types [$default]: "
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read -n 3 -r ans
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echo ""
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key_sizes="${ans:-$default}"
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done
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# Ask password
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echo "Define key passphrase for the key(s)."
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echo "Leave it empty for no password (not recommemded)."
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echo -n "> Key passphrase [none]: "
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read -rs key_pass
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echo
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key_pass="${key_pass:-}"
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ans=""
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while [ "$ans" != "$key_pass" ]; do
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echo -n "> Confirm passphrase: "
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read -rs ans
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echo
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done
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# Create keys
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local size=$key_sizes
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while [ -n "$size" ]; do
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local k=${size:0:1}
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echo -e "\n> Generating key ..."
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set +e
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case $k in
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n)
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ssh-keygen -f "$dest/${key_user}_ed25519_${key_vers}" \
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-t ed25519 -a 100 \
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-N "$key_pass" \
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-C "${key_user}@${key_host}:ed25519_${key_vers}"
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;;
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s)
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ssh-keygen -f "$dest/${key_user}_rsa4096_${key_vers}" \
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-t rsa -b 4096 -o -a 500 \
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-N "$key_pass" \
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-C "${key_user}@${key_host}:rsa4096_${key_vers}"
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;;
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o)
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ssh-keygen -f "$dest/${key_user}_rsa2048_${key_vers}" \
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-t rsa -b 2048 -o -a 100 \
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-N "$key_pass" \
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-C "${key_user}@${key_host}:rsa2048_${key_vers}"
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;;
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esac
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set -e
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size=${size:1}
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done
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echo
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echo "INFO: Key(s) has been created in $dest"
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}
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## Agent functions
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##########################################
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idm_ssh__is_agent_working ()
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{
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local id=$1
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local socket=${2:-_}
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local pid=${3:-0}
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local rc=
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set +e
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SSH_AUTH_SOCK=$socket SSH_AGENT_PID=$pid ssh-add -l &>/dev/null
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rc=$?
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set -e
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[ "$rc" -lt 2 ] && return 0
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}
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idm_ssh__agent_start() {
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local id=$1
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local life=5d
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local run_dir="${XDG_RUNTIME_DIR}/ssh-agent/${id}"
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# Check if we can recover from previous instance
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idm_ssh__agent_clean $id "$run_dir/socket" 0 || true
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# Ensure directory are present
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[ -d "$run_dir" ] || \
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mkdir -p "$run_dir"
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# Ensure env file is not present
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[ ! -f "${run_dir}/env" ] || \
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rm -f "${run_dir}/env"
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#set -x
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# Start the agent
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if ssh-agent -a "$run_dir/socket" -t $life -s | grep ^SSH_ > "$run_dir/env"; then
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echo "$run_dir/env"
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lib_log INFO "Start ssh-agent ..."
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else
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lib_log WARN "Could not start ssh agent :("
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return 1
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fi
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}
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idm_ssh__agent_clean ()
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{
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local id=$1
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local socket=$2
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local pid=${3:-0}
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# We should kill all agents ....
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if [ "${pid}" == '0' ]; then
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#set +x
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pid=$(grep -a "$socket" /proc/*/cmdline \
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| grep -a -v 'thread-self' \
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| strings -s' ' -1 \
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| sed -E 's@ /proc/@ \n/proc/@g'
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)
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#set -x
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pid="$( sed -E 's@/proc/([0-9]*)/.*@\1@' <<<"$pid" )"
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fi
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#set -x
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# Remove process
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if [ ! -z "$pid" ]; then
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if [ "$pid" -gt 0 ]; then
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kill $pid
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fi
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fi
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# Remove socket
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if [ -f "$socket" ]; then
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rm $socket
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fi
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unset SSH_AUTH_SOCK SSH_AGENT_PID
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#lib_log INFO "ssh-agent env cleaned is now clean"
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}
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## Extended functions
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##########################################
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idm_ssh__add ()
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{
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local id=$1
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local key=${2-}
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#lib_id_is_enabled $id
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lib_id_is_enabled $id
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key_list=$(idm_ssh_search_private_keys "$id" "$key")
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[ -n "$key_list" ] || \
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idm_exit 0 WARN "No keys found"
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lib_log INFO "Adding keys:"
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xargs -n 1 <<<$key_list | sed "s:$HOME:~:" | lib_log DUMP -
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echo ""
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ssh-add $key_list
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}
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## SSH Library
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##########################################
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# This function search the bests ssh key file to use matching to an ID
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idm_ssh_search_private_keys ()
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{
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local id=$1
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local key=${2-}
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local maxdepth=2
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if [[ ! -z "$key" ]]; then
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pub_keys=$(
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{
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# Compat mode
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find -L ~/.ssh/$id -maxdepth $maxdepth -name "${id}_*" -name '*pub' -name "*$id*" | sort
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} | sort | uniq
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)
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else
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pub_keys=$(find -L ~/.ssh/$id -maxdepth $maxdepth -name '*pub' | sort)
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fi
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# Get list of key
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local key_list=""
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while read -r pub_key; do
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if [[ -z "$pub_key" ]]; then
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continue
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elif [[ -f "${pub_key//\.pub/.key}" ]]; then
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key_list="${key_list:+$key_list\n}${pub_key//\.pub/.key}"
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else
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if [[ -f "${pub_key%\.pub}" ]]; then
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key_list="${key_list:+$key_list\n}${pub_key%\.pub}"
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else
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lib_log WARN "Can't find private key of: $pub_key"
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fi
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fi
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done <<< "$pub_keys"
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echo -e "$key_list"
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}
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## Deprecated functions
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##########################################
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# Useless at this stage i guess
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idm_ssh__agent_check ()
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{
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#set -x
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local id=$1
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local socket=${2:-_}
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local pid=${3:-0}
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if [ "$socket" == '_' ] && [ "$pid" == '0' ] ; then
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# Parameters are not valid, we assume ssh-agent is not launched at all
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return 1
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elif SSH_AUTH_SOCK=$socket SSH_AGENT_PID=$pid ssh-add -l &>/dev/null ; then
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return 0
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else
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lib_log WARN "ssh-agent is not working as expected"
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fi
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# Is the socket valid ?
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if [ "$socket" != '_' -a ! -S "$socket" ]; then
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lib_log WARN "Socket '$socket' is dead, can't recover ssh-agent"
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idm_ssh__agent_clean $id $socket 0
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return 1
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fi
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if [ "$pid" != '0' -a "$pid" -lt 1 ]; then
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local pid="$( ps aux | grep "$socket" | grep -v 'grep' | head -n 1 | awk '{ print $2 }' )" || \
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pid="$( ps aux | grep "" | grep -v 'grep' | head -n 1 | awk '{ print $2 }' )" || \
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{
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lib_log WARN "Process ssh-agent is dead, cannot recover"
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idm_ssh__agent_clean $id $socket 0
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return 1
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}
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# Kill all processes
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lib_log DEBUG "Multiple PID founds for ssh-agent: $pid"
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q=0
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for p in $pid; do
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return
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idm_ssh__agent_clean $id $socket $pid || true
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q=1
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done
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[ "$q" -eq 0 ] || return 1
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fi
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# Ok, now we can try to recover the things
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# Hmm, we should not arrive here ...
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lib_log WARN "ssh-agent is in a really weird state :/"
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return 1
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}
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