package license import ( "encoding/base64" "fmt" "github.com/edgelesssys/constellation/internal/file" ) func FromFile(fileHandler file.Handler, path string) (string, error) { readBytes, err := fileHandler.Read(path) if err != nil { return "", fmt.Errorf("unable to read from '%s': %w", path, err) } maxSize := base64.StdEncoding.DecodedLen(len(readBytes)) decodedLicense := make([]byte, maxSize) n, err := base64.StdEncoding.Decode(decodedLicense, readBytes) if err != nil { return "", fmt.Errorf("unable to base64 decode license file: %w", err) } if n != 36 { // length of UUID return "", fmt.Errorf("license file corrupt: wrong length") } decodedLicense = decodedLicense[:n] return string(decodedLicense), nil }