Imports github.com/dustyburwell/ed25519 github.com/kalaspuffar/base64url code.google.com/p/go.crypto/scrypt code.google.com/p/rsc/qr Standard library imports bytes crypto/hmac crypto/rand encoding/base64 encoding/binary errors fmt io math/rand net net/http strings time crypto/sha256 crypto/subtle crypto/aes crypto/cipher