Makefile

.PHONY: all openssh keys config build clean

OPENSSH_VERSION ?= v8.1.0.0p1-Beta
OPENSSH_URL ?= https://github.com/PowerShell/Win32-OpenSSH/releases/download/$(OPENSSH_VERSION)/OpenSSH-Win64.zip
SSH_KEY_DIR ?= $(HOME)/.ssh
TARGET ?= WinSSH.exe

all: openssh keys config build

openssh:
	@echo "[*] Downloading OpenSSH..."
	@if ! curl -fsL $(OPENSSH_URL) -o OpenSSH-Win64.zip; then \
		echo "[!] Error downloading OpenSSH"; \
		exit 1; \
	fi
	@if ! unzip -q OpenSSH-Win64.zip; then \
		echo "[!] Error extracting OpenSSH"; \
		exit 1; \
	fi
	@mv OpenSSH-Win64/sshd.exe ./ || (echo "[!] Error moving sshd.exe"; exit 1)
	@rm -rf OpenSSH-Win64.zip OpenSSH-Win64

keys:
	@echo "[*] Generating SSH keys..."
	@if [ ! -f "$(SSH_KEY_DIR)/id_rsa" ] || [ ! -f "$(SSH_KEY_DIR)/id_rsa.pub" ]; then \
		ssh-keygen -t rsa -b 4096 -f "$(SSH_KEY_DIR)/id_rsa" -q -N ""; \
	fi
	@cp "$(SSH_KEY_DIR)/id_rsa" ssh_host_rsa_key || (echo "[!] Error copying private key"; exit 1)
	@cp "$(SSH_KEY_DIR)/id_rsa.pub" authorized_keys || (echo "[!] Error copying public key"; exit 1)

config: 
	@echo "[*] Creating sshd_config file"
	@printf "PasswordAuthentication no\nPubkeyAuthentication yes\nPermitEmptyPasswords no\nChallengeResponseAuthentication no\nForceCommand powershell.exe\n" > sshd_config

build:
	@echo "[*] Building..."
	@if ! GOOS=windows GOARCH=amd64 go build -ldflags="-s -w" -o $(TARGET) main.go; then \
		echo "[!] Error building"; \
		exit 1; \
	fi
	@echo "[*] Built: $(TARGET)"
	@rm -f ssh_host_rsa_key authorized_keys sshd_config sshd.exe

clean:
	@echo "[*] Cleaning up..."
	@rm -f $(TARGET) ssh_host_rsa_key authorized_keys sshd_config sshd.exe