refactor to mautrix 0.17.x; update deps

vendor/maunium.net/go/mautrix/crypto/goolm/libolmpickle/pickle.go

@@ -0,0 +1,41 @@
+package libolmpickle
+
+import (
+	"encoding/binary"
+)
+
+func PickleUInt8(value uint8, target []byte) int {
+	target[0] = value
+	return 1
+}
+func PickleUInt8Len(value uint8) int {
+	return 1
+}
+
+func PickleBool(value bool, target []byte) int {
+	if value {
+		target[0] = 0x01
+	} else {
+		target[0] = 0x00
+	}
+	return 1
+}
+func PickleBoolLen(value bool) int {
+	return 1
+}
+
+func PickleBytes(value, target []byte) int {
+	return copy(target, value)
+}
+func PickleBytesLen(value []byte) int {
+	return len(value)
+}
+
+func PickleUInt32(value uint32, target []byte) int {
+	res := make([]byte, 4) //4 bytes for int32
+	binary.BigEndian.PutUint32(res, value)
+	return copy(target, res)
+}
+func PickleUInt32Len(value uint32) int {
+	return 4
+}

vendor/maunium.net/go/mautrix/crypto/goolm/libolmpickle/unpickle.go

@@ -0,0 +1,53 @@
+package libolmpickle
+
+import (
+	"fmt"
+
+	"maunium.net/go/mautrix/crypto/goolm"
+)
+
+func isZeroByteSlice(bytes []byte) bool {
+	b := byte(0)
+	for _, s := range bytes {
+		b |= s
+	}
+	return b == 0
+}
+
+func UnpickleUInt8(value []byte) (uint8, int, error) {
+	if len(value) < 1 {
+		return 0, 0, fmt.Errorf("unpickle uint8: %w", goolm.ErrValueTooShort)
+	}
+	return value[0], 1, nil
+}
+
+func UnpickleBool(value []byte) (bool, int, error) {
+	if len(value) < 1 {
+		return false, 0, fmt.Errorf("unpickle bool: %w", goolm.ErrValueTooShort)
+	}
+	return value[0] != uint8(0x00), 1, nil
+}
+
+func UnpickleBytes(value []byte, length int) ([]byte, int, error) {
+	if len(value) < length {
+		return nil, 0, fmt.Errorf("unpickle bytes: %w", goolm.ErrValueTooShort)
+	}
+	resp := value[:length]
+	if isZeroByteSlice(resp) {
+		return nil, length, nil
+	}
+	return resp, length, nil
+}
+
+func UnpickleUInt32(value []byte) (uint32, int, error) {
+	if len(value) < 4 {
+		return 0, 0, fmt.Errorf("unpickle uint32: %w", goolm.ErrValueTooShort)
+	}
+	var res uint32
+	count := 0
+	for i := 3; i >= 0; i-- {
+		res |= uint32(value[count]) << (8 * i)
+		count++
+	}
+	return res, 4, nil
+}