From d6ba30980a567f23e88f827be63cc0a577c309be Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jakobus=20Sch=C3=BCrz?= <jakobus.schuerz@home.arpa>
Date: Thu, 6 Jul 2023 17:28:33 +0200
Subject: [PATCH] =?UTF-8?q?wei=C3=9F=20nicht?=
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---
 bin/ssh-startagent | 166 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 166 insertions(+)
 create mode 100755 bin/ssh-startagent

diff --git a/bin/ssh-startagent b/bin/ssh-startagent
new file mode 100755
index 0000000..fca0630
--- /dev/null
+++ b/bin/ssh-startagent
@@ -0,0 +1,166 @@
+#!/bin/bash
+
+FILELOGLEVEL=DEBUG
+. $(dirname $0)/../logging
+# loggerfactory
+LANG=C
+
+ssh_runinagent () {
+    # run ssh-* commands in wanted agent
+    
+    if [ check_identity ]
+    then
+        local SSH_AUTH_SOCK
+        local SSH_AGENT_PID
+        local agentfile=$(get_agentfile)
+        shift
+        local sshcommand=${@}
+
+        logtrace "run command »$sshcommand« in agent $agentfile" 
+        if [ -e "$agentfile" ]; then 
+            . $agentfile 
+        fi
+        logdebug "SSH_AUTH_SOCK: ${SSH_AUTH_SOCK:-x}"
+        if [ "${SSH_AUTH_SOCK:-x}" = "x" ]
+        then
+            start_or_restart_agent
+            . $agentfile
+        fi
+        $sshcommand
+        ret=$?
+    fi
+}
+
+check_identity () {
+    # is ssh-identity existing?
+    if [ -e ${SSH_IDENTITIES_DIR}/${ssh_identity} ]
+    then
+        return 0
+    else
+        logerr "Identity ${ssh_identity} is not definded. Create identity-directory ${SSH_IDENTITIES_DIR}/${ssh_identity}"
+        exit 1
+    fi
+}
+
+get_agentfilename () {
+    printf "%s" "${SSH_AGENTS_DIR}/agent-${ssh_identity}"
+}
+get_agentsocketname () {
+    printf "%s" "${SSH_AGENT_SOCKETS_DIR}/socket-${ssh_identity}"
+}
+
+start_or_restart_agent () {
+    if check_identity
+    then
+        check_agent
+        ret=$?
+        logdebug "check_agent returncode $ret"
+        case $ret in
+            0) 
+                logdebug "agent is running"
+                ret=0
+                ;;
+            1)
+                logdebug "agent is running, but:"
+                ret=1
+                ;;
+            2)
+                logdebug "former agent is not running -> start it"
+                logdebug "SSH_AGENT_OPTIONS: $SSH_AGENT_OPTIONS"
+                startagent=true
+                ;;
+            3)
+                logwarning "Agent is not ok"
+                startagent=true
+                ;;
+            *)
+                logwarning "Something else with agent"
+                ret=99
+                ;;
+        esac
+        if ${startagent:-false}
+        then
+            ssh-agent -a $(get_agentsocketname) ${SSH_AGENT_OPTIONS} > $(get_agentfilename)
+            ret=$?
+        fi
+        ssh_runinagent ${ssh_identity} ssh-add -l >/dev/null 2>&1
+        if [ $? -eq 0 ]
+        then
+            printf "%s\n" "$(get_agentfilename)"
+        else
+            ret=92
+        fi
+    fi
+}
+
+check_agent () {
+    if [ -e $(get_agentsocketname) ]
+    then
+        ssh_runinagent ${ssh_identity} ssh-add -l >/dev/null 2>&1
+        return $?
+    fi
+    logdebug "agent socketname: $(get_agentsocketname)"
+    return 3
+}
+
+get_agentfile () {
+    if check_identity
+    then
+        printf "%s" "$(get_agentfilename)"
+    fi
+}
+
+get_agentsocket () {
+    if check_identity
+    then
+        printf "%s" "$(get_agentsocketname)"
+    fi
+}
+
+agent_load_identity_keys () {
+        
+    # If DISPLAY is set, ssh-add calls ssh-askpass, and if its in remote-terminal, it wont work
+    # So remember and unset DISPLAY, and set it at the end again, if it was set before
+    [ $DISPLAY ] && local DISPLAY_ORIG=$DISPLAY
+    [ $DISPLAY ] && logtrace "unset DISPLAY: $DISPLAY"
+    [ $DISPLAY ] && unset DISPLAY
+
+
+}
+
+ssh_identity=${1:-default}
+identitydir=${SSH_IDENTITIES_DIR}/${ssh_identity}
+[ -z "${SSH_IDENTITIES_DIR+x}" ]    && { export SSH_IDENTITIES_DIR="${SSH_IDENTITIES_DEFAULT_DIR-${HOME}/.ssh/identities}"; }
+[ -z "${SSH_AGENTS_DIR+x}" ]        && { export SSH_AGENTS_DIR=${SSH_AGENTS_DEFAULT_DIR-~/.ssh/agents}; }
+[ -z "${SSH_AGENT_SOCKETS_DIR+x}" ] && { export SSH_AGENT_SOCKETS_DIR=${SSH_AGENT_SOCKETS_DEFAULT_DIR-~/.ssh/agents}; }
+[ -z "${SSH_AGENT_OPTIONS+x}" ]     && { export SSH_AGENT_OPTIONS=${SSH_AGENT_DEFAULT_OPTIONS--t 7200 }; }
+
+export SSH_IDENTITIES_DIR SSH_AGENTS_DIR SSH_AGENT_SOCKETS_DIR SSH_AGENT_OPTIONS
+
+#logdebug "<< EOF
+#    ssh identity:       ${ssh_identity}
+#    identidies dir:     $SSH_IDENTITIES_DIR
+#    agents dir:         $SSH_AGENTS_DIR
+#    agents sockets dir: $SSH_AGENT_SOCKETS_DIR
+#    agents options:     $SSH_AGENT_OPTIONS
+#    agentfile:          $(get_agentfile ${ssh_identity})
+#    agentsocket:        $(get_agentsocket ${ssh_identity})
+#EOF
+#"
+#logtrace "Keys in your shells agent ${SSH_AUTH_SOCK}: $(ssh-add -l)"
+logtrace "Keys in agent ${ssh_identity}: $(ssh_runinagent bmi ssh-add -l)"
+
+
+createonly=false
+
+if [[ $SSH_TTY || $X2GO_SESSION ]] ; then
+    logdebug "Shell running with forwarded ssh-agent. Please add local token manually"
+    check_token
+    res=1
+else
+    logdebug "run with local ssh-agent"
+    start_or_restart_agent
+    ! $createonly && agent_load_identity_keys $ssh_identity
+    res=0
+fi
+#exit $res