Imports github.com/luisfurquim/goose github.com/makiuchi-d/gozxing github.com/makiuchi-d/gozxing/qrcode github.com/youmark/pkcs8 Standard library imports bytes crypto crypto/rand crypto/rsa crypto/sha1 crypto/sha256 crypto/sha512 crypto/x509 crypto/x509/pkix encoding/asn1 encoding/base64 encoding/pem errors fmt image/color image/png io math/big net/mail os runtime time