Imports github.com/sec51/convert github.com/sec51/convert/bigendian golang.org/x/sync/errgroup rsc.io/qr golang.org/x/crypto/bcrypt github.com/pilinux/cryptoengine Standard library imports bytes context crypto crypto/hmac crypto/rand crypto/sha1 crypto/sha256 crypto/sha512 encoding/base32 encoding/hex errors fmt hash io math net/url regexp strconv strings time