make _pragma_key more generic

README.md

@@ -25,7 +25,7 @@ To create and open encrypted database files use the following DSN parameters:
 
 ```go
 key := "2DD29CA851E7B56E4697B0E1F08507293D761A05CE4D1B628663F411A8086D99"
-dbname := fmt.Sprintf("test?_pragma_key=%s&_pragma_cipher_page_size=4096", key)
+dbname := fmt.Sprintf("db?_pragma_key=x'%s'&_pragma_cipher_page_size=4096", key)
 db, _ := sql.Open("sqlite3", dbname)
 ```
 

sqlcipher_test.go

@@ -14,7 +14,7 @@ var db *sql.DB
 
 func init() {
 	// create DB
-	key := "2DD29CA851E7B56E4697B0E1F08507293D761A05CE4D1B628663F411A8086D99"
+	key := "passphrase"
 	tmpdir, err := ioutil.TempDir("", "sqlcipher_test")
 	if err != nil {
 		panic(err)

sqlite3.go

@@ -71,7 +71,6 @@ import "C"
 import (
 	"database/sql"
 	"database/sql/driver"
-	"encoding/hex"
 	"errors"
 	"fmt"
 	"io"
@@ -282,7 +281,7 @@ func errorString(err Error) string {
 //     "deferred", "exclusive".
 // go-sqlcipher adds the following query parameters to those used by SQLite:
 //   _pragma_key=XXX
-//     Specify raw PRAGMA key (must be 64 character hex string).
+//     Specify PRAGMA key.
 //   _pragma_cipher_page_size=XXX
 //     Set the PRAGMA cipher_page_size to adjust the page size.
 func (d *SQLiteDriver) Open(dsn string) (driver.Conn, error) {
@@ -368,13 +367,7 @@ func (d *SQLiteDriver) Open(dsn string) (driver.Conn, error) {
 	if params != nil {
 		// _pragma_key
 		if val := params.Get("_pragma_key"); val != "" {
-			if len(val) != 64 {
-				return nil, errors.New("sqlite3: _pragma_key doesn't have length 64")
-			}
-			if _, err := hex.DecodeString(val); err != nil {
-				return nil, fmt.Errorf("sqlite3: _pragma_key cannot be decoded: %s", err)
-			}
-			query := fmt.Sprintf("PRAGMA key = \"x'%s'\";", val)
+			query := fmt.Sprintf("PRAGMA key = \"%s\";", val)
 			if _, err := conn.Exec(query, nil); err != nil {
 				return nil, err
 			}