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https://github.com/Ascyii/dotfiles.git
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91 lines
1.9 KiB
Bash
Executable File
91 lines
1.9 KiB
Bash
Executable File
#!/usr/bin/env sh
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set -eu
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SSH_DIR="$HOME/.ssh"
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MACHINE_KEY="$SSH_DIR/id_ed25519"
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providers="github university strato gitea"
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mkdir -p "$SSH_DIR"
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chmod 700 "$SSH_DIR"
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###############################################################################
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# 1. Ensure machine-only key exists
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###############################################################################
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if [ ! -e "$MACHINE_KEY" ]; then
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echo "No machine key found. Generating id_ed25519 (machine-only)."
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ssh-keygen \
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-t ed25519 \
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-f "$MACHINE_KEY" \
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-N "" \
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-C "$(hostname)-machine"
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chmod 600 "$MACHINE_KEY"
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chmod 644 "$MACHINE_KEY.pub"
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echo "Machine key created:"
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echo " $MACHINE_KEY"
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echo " $MACHINE_KEY.pub"
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else
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echo "Machine key already exists: $MACHINE_KEY"
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fi
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###############################################################################
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# 2. Provider-specific key bootstrap
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###############################################################################
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echo
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echo "Select provider:"
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i=1
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for p in $providers; do
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printf " %d) %s\n" "$i" "$p"
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i=$((i + 1))
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done
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printf "> "
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read -r choice
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case "$choice" in
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1) provider="github" ;;
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2) provider="university" ;;
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3) provider="strato" ;;
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4) provider="gitea" ;;
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*)
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echo "Invalid selection" >&2
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exit 1
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;;
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esac
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key_path="$SSH_DIR/id_$provider"
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if [ -e "$key_path" ]; then
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echo "Refusing to overwrite existing key: $key_path" >&2
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exit 1
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fi
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umask 077
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echo
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echo "Paste the private key for '$provider'."
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echo "Finish with EOF (Ctrl-D on empty line)."
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echo
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key="$(cat)"
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case "$key" in
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*"BEGIN "*PRIVATE*" KEY"*)
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;;
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*)
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echo "Input does not look like a private key. Aborting." >&2
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exit 1
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;;
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esac
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printf "%s\n" "$key" > "$key_path"
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chmod 600 "$key_path"
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echo
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echo "Key written to $key_path with permissions 600"
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