package crypto import ( "encoding/base64" "google.golang.org/protobuf/proto" "go.mau.fi/mautrix-gmessages/libgm/binary" ) var SequenceOne = []int{1, 2, 840, 10045, 2, 1} var SequenceTwo = []int{1, 2, 840, 10045, 3, 1, 7} func EncodeValues(a *[]byte, b []int) { *a = append(*a, 6) idx := len(*a) *a = append(*a, 0) *a = append(*a, byte(40*b[0]+b[1])) for i := 2; i < len(b); i++ { d := b[i] e := make([]byte, 0) if d > 128 { e = append(e, byte(d/128)+128) } e = append(e, byte(d%128)) *a = append(*a, e...) } (*a)[idx] = byte(len(*a) - idx - 1) } func AppendBytes(a []byte, b []byte) []byte { newA := make([]byte, len(a)) copy(newA, a) newA = HelperAppendBytes(newA, 48) newA = HelperAppendBytes(newA, byte(len(b))) for _, value := range b { newA = HelperAppendBytes(newA, value) } return newA } func HelperAppendBytes(a []byte, b byte) []byte { return append(a, b) } func AppendByteSequence(byteArr1 []byte, byteArr2 []byte, uncompressedPublicKey []byte) []byte { copiedByteArray := AppendBytes(byteArr1, byteArr2) copiedByteArray = HelperAppendBytes(copiedByteArray, 3) copiedByteArray = HelperAppendBytes(copiedByteArray, uint8(len(uncompressedPublicKey)+1)) copiedByteArray = HelperAppendBytes(copiedByteArray, 0) return copiedByteArray } func EncodeProtoB64(message proto.Message) (string, error) { protoBytes, protoErr := binary.EncodeProtoMessage(message) if protoErr != nil { return "", protoErr } encodedStr := base64.StdEncoding.EncodeToString(protoBytes) return encodedStr, nil }