BREAKING CHANGE: enforce password authentication

action.yml

@@ -41,6 +41,12 @@ runs:
     - name: Setup and start PostgreSQL
       run: |
         export PGDATA="$RUNNER_TEMP/pgdata"
+        export PWFILE="$RUNNER_TEMP/pwfile"
+
+        # Unfortunately 'initdb' could only receive a password via file on disk
+        # or prompt to enter on. Prompting is not an option since we're running
+        # in non-interactive mode.
+        echo '${{ inputs.password }}' > $PWFILE
 
         # There are couple of reasons why we need to create a new PostgreSQL
         # database cluster. First and foremost, we have to create a superuser
@@ -53,6 +59,8 @@ runs:
         # [1] https://www.postgresql.org/docs/15/reference-client.html
         initdb \
           --username="${{ inputs.username }}" \
+          --pwfile="$PWFILE" \
+          --auth="scram-sha-256" \
           --encoding="UTF-8" \
           --locale="en_US.UTF-8" \
           --no-instructions
@@ -69,13 +77,14 @@ runs:
         # PGHOST is required for Linux/macOS because we turned off unix sockets
         # and they use them by default.
         #
-        # PGPORT, PGUSER and PGDATABASE are required because they could be
-        # parametrized via action input parameters.
+        # PGPORT, PGUSER, PGPASSWORD and PGDATABASE are required because they
+        # could be parametrized via action input parameters.
         #
         # [1] https://www.postgresql.org/docs/15/reference-client.html
         echo "PGHOST=localhost" >> $GITHUB_ENV
         echo "PGPORT=${{ inputs.port }}" >> $GITHUB_ENV
         echo "PGUSER=${{ inputs.username }}" >> $GITHUB_ENV
+        echo "PGPASSWORD=${{ inputs.password }}" >> $GITHUB_ENV
         echo "PGDATABASE=${{ inputs.database }}" >> $GITHUB_ENV
       shell: bash
 

test_action.py

@@ -146,7 +146,7 @@ def test_user_create_drop_user(
         connection.execute(f"DROP USER {username}")
 
 
-def test_client_applications(connection_uri, connection_factory):
+def test_client_applications(connection_factory: ConnectionFactory, connection_uri: str):
     """Test that PostgreSQL client applications can be used."""
 
     username = "us3rname"
@@ -167,3 +167,26 @@ def test_client_applications(connection_uri, connection_factory):
     finally:
         subprocess.check_call(["dropdb", database])
         subprocess.check_call(["dropuser", username])
+
+
+def test_auth_wrong_username(connection_factory: ConnectionFactory, connection_uri: str):
+    """Test that wrong username is rejected!"""
+
+    connection_furl = furl.furl(connection_uri, username="wrong")
+
+    with pytest.raises(psycopg.OperationalError) as excinfo:
+        connection_factory(connection_furl.url)
+
+    assert 'password authentication failed for user "wrong"' in str(excinfo.value)
+
+
+def test_auth_wrong_password(connection_factory: ConnectionFactory, connection_uri: str):
+    """Test that wrong password is rejected!"""
+
+    connection_furl = furl.furl(connection_uri, password="wrong")
+    username = connection_furl.username
+
+    with pytest.raises(psycopg.OperationalError) as excinfo:
+        connection_factory(connection_furl.url)
+
+    assert f'password authentication failed for user "{username}"' in str(excinfo.value)