test: some sanity tests for jit pam module

Author: samrose

testinfra/test_ami_nix.py

@@ -623,6 +623,140 @@ def test_libpq5_version(host):
     print("✓ libpq5 version is >= 14")
 
 
+def test_jit_pam_module_installed(host):
+    """Test that the JIT PAM module (pam_jit_pg.so) is properly installed."""
+    # Check if gatekeeper is installed via Nix
+    result = run_ssh_command(host['ssh'], "sudo -u postgres ls -la /var/lib/postgresql/.nix-profile/lib/security/pam_jit_pg.so 2>/dev/null")
+    if result['succeeded']:
+        print(f"\nJIT PAM module found in Nix profile:\n{result['stdout']}")
+    else:
+        print("\nJIT PAM module not found in postgres user's Nix profile")
+        assert False, "JIT PAM module (pam_jit_pg.so) not found in expected location"
+    
+    # Check if the symlink exists in the Linux PAM security directory
+    result = run_ssh_command(host['ssh'], "find /nix/store -type f -path '*/lib/security/pam_jit_pg.so' 2>/dev/null | head -5")
+    if result['succeeded'] and result['stdout'].strip():
+        print(f"\nJIT PAM module symlinks found:\n{result['stdout']}")
+    else:
+        print("\nNo JIT PAM module symlinks found in /nix/store")
+    
+    # Verify the module is a valid shared library
+    result = run_ssh_command(host['ssh'], "file /var/lib/postgresql/.nix-profile/lib/security/pam_jit_pg.so")
+    if result['succeeded']:
+        print(f"\nJIT PAM module file type:\n{result['stdout']}")
+        assert "shared object" in result['stdout'].lower() or "dynamically linked" in result['stdout'].lower(), \
+            "JIT PAM module is not a valid shared library"
+    
+    print("✓ JIT PAM module is properly installed")
+
+
+def test_pam_postgresql_config(host):
+    """Test that the PAM configuration for PostgreSQL exists and is properly configured."""
+    # Check PostgreSQL version to determine if PAM config should exist
+    result = run_ssh_command(host['ssh'], "sudo -u postgres psql --version | grep -oE '[0-9]+' | head -1")
+    pg_major_version = 15  # Default
+    if result['succeeded'] and result['stdout'].strip():
+        try:
+            pg_major_version = int(result['stdout'].strip())
+        except ValueError:
+            pass
+    
+    print(f"\nPostgreSQL major version: {pg_major_version}")
+    
+    # PAM config should exist for non-PostgreSQL 15 versions
+    if pg_major_version != 15:
+        # Check if PAM config file exists
+        result = run_ssh_command(host['ssh'], "ls -la /etc/pam.d/postgresql")
+        if result['succeeded']:
+            print(f"\nPAM config file found:\n{result['stdout']}")
+            
+            # Check file permissions
+            result = run_ssh_command(host['ssh'], "stat -c '%a %U %G' /etc/pam.d/postgresql")
+            if result['succeeded']:
+                perms = result['stdout'].strip()
+                print(f"PAM config permissions: {perms}")
+                # Should be owned by postgres:postgres with 664 permissions
+                assert "postgres postgres" in perms, "PAM config not owned by postgres:postgres"
+        else:
+            print("\nPAM config file not found")
+            assert False, "PAM configuration file /etc/pam.d/postgresql not found"
+    else:
+        print("\nSkipping PAM config check for PostgreSQL 15")
+        # For PostgreSQL 15, the PAM config should NOT exist
+        result = run_ssh_command(host['ssh'], "test -f /etc/pam.d/postgresql")
+        if result['succeeded']:
+            print("\nWARNING: PAM config exists for PostgreSQL 15 (not expected)")
+    
+    print("✓ PAM configuration is properly set up")
+
+
+def test_jit_pam_gatekeeper_profile(host):
+    """Test that the gatekeeper package is properly installed in the postgres user's Nix profile."""
+    # Check if gatekeeper is in the postgres user's Nix profile
+    result = run_ssh_command(host['ssh'], "sudo -u postgres nix profile list 2>/dev/null | grep -i gatekeeper")
+    if result['succeeded'] and result['stdout'].strip():
+        print(f"\nGatekeeper found in Nix profile:\n{result['stdout']}")
+    else:
+        # Try alternative check
+        result = run_ssh_command(host['ssh'], "sudo -u postgres ls -la /var/lib/postgresql/.nix-profile/ | grep -i gate")
+        if result['succeeded'] and result['stdout'].strip():
+            print(f"\nGatekeeper-related files in profile:\n{result['stdout']}")
+        else:
+            print("\nGatekeeper not found in postgres user's Nix profile")
+            # This might be expected if it's installed system-wide instead
+    
+    # Check if we can find the gatekeeper derivation
+    result = run_ssh_command(host['ssh'], "find /nix/store -maxdepth 1 -type d -name '*gatekeeper*' 2>/dev/null | head -5")
+    if result['succeeded'] and result['stdout'].strip():
+        print(f"\nGatekeeper derivations found:\n{result['stdout']}")
+    else:
+        print("\nNo gatekeeper derivations found in /nix/store")
+    
+    print("✓ Gatekeeper package installation check completed")
+
+
+def test_jit_pam_module_dependencies(host):
+    """Test that the JIT PAM module has all required dependencies."""
+    # Check dependencies of the PAM module
+    result = run_ssh_command(host['ssh'], "ldd /var/lib/postgresql/.nix-profile/lib/security/pam_jit_pg.so 2>/dev/null")
+    if result['succeeded']:
+        print(f"\nJIT PAM module dependencies:\n{result['stdout']}")
+        
+        # Check for required libraries
+        required_libs = ["libpam", "libc"]
+        for lib in required_libs:
+            if lib not in result['stdout'].lower():
+                print(f"WARNING: Required library {lib} not found in dependencies")
+        
+        # Check for any missing dependencies
+        if "not found" in result['stdout'].lower():
+            assert False, "JIT PAM module has missing dependencies"
+    else:
+        print("\nCould not check JIT PAM module dependencies")
+    
+    print("✓ JIT PAM module dependencies are satisfied")
+
+
+def test_jit_pam_postgresql_integration(host):
+    """Test that PostgreSQL can be configured to use PAM authentication."""
+    # Check if PAM is available as an authentication method in PostgreSQL
+    result = run_ssh_command(host['ssh'], "sudo -u postgres psql -c \"SELECT name, setting FROM pg_settings WHERE name LIKE '%pam%';\" 2>/dev/null")
+    if result['succeeded']:
+        print(f"\nPostgreSQL PAM-related settings:\n{result['stdout']}")
+    
+    # Check pg_hba.conf for potential PAM entries (even if not currently active)
+    result = run_ssh_command(host['ssh'], "grep -i pam /etc/postgresql/pg_hba.conf 2>/dev/null || echo 'No PAM entries in pg_hba.conf'")
+    if result['succeeded']:
+        print(f"\nPAM entries in pg_hba.conf:\n{result['stdout']}")
+    
+    # Verify PostgreSQL was compiled with PAM support
+    result = run_ssh_command(host['ssh'], "sudo -u postgres pg_config --configure 2>/dev/null | grep -i pam || echo 'PAM compile flag not found'")
+    if result['succeeded']:
+        print(f"\nPostgreSQL PAM compile flags:\n{result['stdout']}")
+    
+    print("✓ PostgreSQL PAM integration check completed")
+
+
 def test_postgrest_read_only_session_attrs(host):
     """Test PostgREST with target_session_attrs=read-only and check for session errors."""
     # First, check if PostgreSQL is configured for read-only mode