status-go/vendor/github.com/mutecomm/go-sqlcipher/v4/sqlcipher.go

36 lines
915 B
Go
Raw Normal View History

package sqlite3
import (
"bytes"
"errors"
"os"
)
// sqlite3Header defines the header string used by SQLite 3.
var sqlite3Header = []byte("SQLite format 3\000")
// IsEncrypted returns true, if the database with the given filename is
// encrypted, and false otherwise.
// If the database header cannot be read properly an error is returned.
func IsEncrypted(filename string) (bool, error) {
// open file
db, err := os.Open(filename)
if err != nil {
return false, err
}
defer db.Close()
// read header
var header [16]byte
n, err := db.Read(header[:])
if err != nil {
return false, err
}
if n != len(header) {
return false, errors.New("go-sqlcipher: could not read full header")
}
// SQLCipher encrypts also the header, the file is encrypted if the read
// header does not equal the header string used by SQLite 3.
encrypted := !bytes.Equal(header[:], sqlite3Header)
return encrypted, nil
}