add vendoring

vendor/maunium.net/go/mautrix/crypto/olm/olm.go

@@ -0,0 +1,32 @@
+package olm
+
+// #cgo LDFLAGS: -lolm -lstdc++
+// #include <olm/olm.h>
+import "C"
+import (
+	"maunium.net/go/mautrix/id"
+)
+
+// Signatures is the data structure used to sign JSON objects.
+type Signatures map[id.UserID]map[id.DeviceKeyID]string
+
+// Version returns the version number of the olm library.
+func Version() (major, minor, patch uint8) {
+	C.olm_get_library_version(
+		(*C.uint8_t)(&major),
+		(*C.uint8_t)(&minor),
+		(*C.uint8_t)(&patch))
+	return
+}
+
+// errorVal returns the value that olm functions return if there was an error.
+func errorVal() C.size_t {
+	return C.olm_error()
+}
+
+var pickleKey = []byte("maunium.net/go/mautrix/crypto/olm")
+
+// SetPickleKey sets the global pickle key used when encoding structs with Gob or JSON.
+func SetPickleKey(key []byte) {
+	pickleKey = key
+}