func (a *archive50) parseEncryptionBlock(b readBuf) error {
	if ver := b.uvarint(); ver != 0 {
		return errUnknownEncMethod
	}
	flags := b.uvarint()
	keys, err := a.getKeys(&b)
	if err != nil {
		return err
	}
	if flags&enc5CheckPresent > 0 {
		if err := checkPassword(&b, keys); err != nil {
			return err
		}
	}
	a.blockKey = keys[0]
	return nil
}
func (a *archive50) parseEncryptionBlock(b readBuf) error {
	if ver := b.uvarint(); ver != 0 {
		return errUnknownEncMethod
	}
	flags := b.uvarint()
	keys, err := a.getKeys(&b)
	if err != nil {
		return err
	}
	if flags&enc5CheckPresent > 0 {
		if err := checkPassword(&b, keys); err != nil {
			return err
		}
	}
	a.blockKey = keys[0]
	return nil
}
func ( a * archive50 ) parseEncryptionBlock ( b readBuf ) error { if ver := b . uvarint ( ) ; ver != 0 { return errUnknownEncMethod } flags := b . uvarint ( ) keys , err := a . getKeys ( & b ) if err != nil { return err } if flags & enc5CheckPresent > 0 { if err := checkPassword ( & b , keys ) ; err != nil { return err } } a . blockKey = keys [ 0 ] return nil }
// parseEncryptionBlock calculates the key for block encryption.
parseEncryptionBlock calculates the key for block encryption .