Imports github.com/chrisfenner/pkcs7 github.com/google/certificate-transparency-go/x509 github.com/google/go-attestation/attest github.com/google/go-tpm/tpm2 github.com/google/go-tpm/tpmutil Standard library imports bytes crypto crypto/rand crypto/rsa crypto/sha1 crypto/sha256 crypto/x509 crypto/x509/pkix encoding/asn1 encoding/binary encoding/hex fmt io io/ioutil math/big math/rand net/http reflect strings time unicode/utf16