add wipeboltcard

wipeboltcard/database.go

@@ -0,0 +1,97 @@
+package main
+
+import (
+	"database/sql"
+	"errors"
+	"fmt"
+	_ "github.com/lib/pq"
+	"os"
+)
+
+func db_open() (*sql.DB, error) {
+
+	// get connection string from environment variables
+
+	conn := fmt.Sprintf("host=%s port=%s user=%s password=%s dbname=%s sslmode=disable",
+		os.Getenv("DB_HOST"),
+		os.Getenv("DB_PORT"),
+		os.Getenv("DB_USER"),
+		os.Getenv("DB_PASSWORD"),
+		os.Getenv("DB_NAME"))
+
+	db, err := sql.Open("postgres", conn)
+	if err != nil {
+		return db, err
+	}
+
+	return db, nil
+}
+
+func db_get_card_name_count(card_name string) (card_count int, err error) {
+
+        card_count = 0
+
+        db, err := db_open()
+        if err != nil {
+                return 0, err
+        }
+        defer db.Close()
+
+        sqlStatement := `SELECT COUNT(card_id) FROM cards WHERE card_name = $1;`
+
+        row := db.QueryRow(sqlStatement, card_name)
+        err = row.Scan(&card_count)
+        if err != nil {
+                return 0, err
+        }
+
+        return card_count, nil
+}
+
+func db_wipe_card(card_name string) (*card_wipe_info, error) {
+
+	card_wipe_info := card_wipe_info{}
+
+	db, err := db_open()
+	if err != nil {
+		return &card_wipe_info, err
+	}
+	defer db.Close()
+
+	// set card as wiped and disabled
+
+	sqlStatement := `UPDATE cards SET` +
+		` lnurlw_enable = 'N', lnurlp_enable = 'N', email_enable = 'N', wiped = 'Y'` +
+		` WHERE card_name = $1;`
+	res, err := db.Exec(sqlStatement, card_name)
+	if err != nil {
+		return &card_wipe_info, err
+	}
+	count, err := res.RowsAffected()
+	if err != nil {
+		return &card_wipe_info, err
+	}
+	if count != 1 {
+		return &card_wipe_info, errors.New("not one card record updated")
+	}
+
+	// get card keys
+
+	sqlStatement = `SELECT card_id, uid, k0_auth_key, k2_cmac_key, k3, k4` +
+		` FROM cards WHERE card_name = $1;`
+	row := db.QueryRow(sqlStatement, card_name)
+	err = row.Scan(
+		&card_wipe_info.id,
+		&card_wipe_info.uid,
+		&card_wipe_info.k0,
+		&card_wipe_info.k2,
+		&card_wipe_info.k3,
+		&card_wipe_info.k4)
+	if err != nil {
+		return &card_wipe_info, err
+	}
+
+	card_wipe_info.k1 = os.Getenv("AES_DECRYPT_KEY")
+
+	return &card_wipe_info, nil
+}