Packages
macula
4.2.9
7.0.0
6.0.0
5.2.2
5.2.1
5.2.0
5.1.0
5.0.0
4.8.0
4.7.1
4.7.0
4.6.0
4.5.0
4.4.10
4.4.9
4.4.8
4.4.7
4.4.6
4.4.5
4.4.4
4.4.3
4.4.2
4.4.1
4.4.0
4.3.1
4.3.0
4.2.9
4.2.8
4.2.7
4.2.6
4.2.5
4.2.4
4.2.3
4.2.2
4.2.1
4.2.0
4.1.1
4.1.0
4.0.0
3.16.0
3.15.3
3.15.2
3.15.1
3.14.0
3.13.0
3.12.1
3.12.0
3.11.1
3.11.0
3.10.3
3.10.2
3.10.1
3.9.0
3.8.0
3.7.0
3.5.0
3.4.0
3.3.0
3.2.0
3.1.0
3.0.0
2.1.1
2.1.0
2.0.0
1.5.2
1.5.1
1.4.30
1.4.29
1.4.28
1.4.27
1.4.26
1.4.25
1.4.24
1.4.23
1.4.22
1.4.21
1.4.20
1.4.19
1.4.18
1.4.17
1.4.16
1.4.15
1.4.14
1.4.13
1.4.11
1.4.10
1.4.9
1.4.8
1.4.7
1.4.6
1.4.5
1.4.4
1.4.3
1.4.2
1.4.1
1.4.0
1.3.1
1.3.0
1.2.0
1.1.0
1.0.10
1.0.9
1.0.8
1.0.7
1.0.6
1.0.5
1.0.4
1.0.3
1.0.2
1.0.1
1.0.0
0.48.6
0.48.5
0.48.4
0.48.3
0.48.2
0.48.1
0.48.0
0.47.1
0.47.0
0.46.3
0.46.1
0.46.0
0.45.3
0.45.2
0.45.1
0.45.0
0.44.2
0.44.1
0.44.0
0.43.3
0.43.2
0.43.1
0.43.0
0.42.9
0.42.8
0.42.7
0.42.6
0.42.5
0.42.4
0.42.3
0.42.2
0.42.1
0.42.0
0.41.1
0.41.0
0.40.1
0.40.0
0.39.9
0.39.8
0.39.7
0.39.6
0.39.5
0.39.4
0.39.3
0.39.2
0.39.1
0.39.0
0.38.8
0.38.7
0.38.6
0.38.5
0.38.4
0.38.3
0.38.2
0.38.1
0.38.0
0.37.7
0.37.6
0.37.5
0.37.4
0.37.3
0.37.2
0.37.1
0.37.0
0.36.6
0.36.5
0.36.4
0.36.3
0.36.2
0.36.1
0.36.0
0.35.4
0.35.3
0.35.2
0.35.1
0.35.0
0.34.1
0.34.0
0.33.1
0.33.0
0.32.5
0.32.4
0.32.3
0.32.2
0.32.1
0.32.0
0.31.9
0.31.8
0.31.7
0.31.6
0.31.5
0.31.4
0.31.3
0.31.2
0.31.1
0.31.0
0.30.10
0.30.9
0.30.8
0.30.7
0.30.6
0.30.5
0.30.4
0.30.3
0.30.2
0.30.1
0.30.0
0.29.0
0.28.3
0.28.2
0.28.1
0.28.0
0.27.1
0.27.0
0.26.1
0.26.0
0.25.6
0.25.5
0.25.4
0.25.3
0.25.2
0.25.1
0.25.0
0.24.6
0.24.5
0.24.4
0.24.3
0.24.2
0.24.1
0.24.0
0.23.3
0.23.2
0.23.1
0.23.0
0.22.12
0.22.11
0.22.10
0.22.9
0.22.8
0.22.7
0.22.6
0.22.5
0.22.4
0.22.3
0.22.2
0.22.1
0.22.0
0.21.7
0.21.6
0.21.5
0.21.4
0.21.2
0.21.1
0.21.0
0.20.25
0.20.24
0.20.23
0.20.22
0.20.21
0.20.20
0.20.19
0.20.18
0.20.17
0.20.16
0.20.15
0.20.14
0.20.13
0.20.12
0.20.11
0.20.10
0.20.9
0.20.8
0.20.7
0.20.6
0.20.5
0.20.3
0.20.2
0.20.1
0.20.0
0.19.2
0.19.1
0.19.0
0.18.1
0.18.0
0.17.4
0.17.3
0.17.2
0.17.1
0.17.0
0.16.6
0.16.5
0.16.4
0.16.3
0.16.2
0.16.1
0.16.0
0.15.1
0.15.0
0.14.3
0.14.2
0.14.1
0.14.0
0.12.6
0.12.5
0.12.3
0.11.3
0.10.2
0.10.1
0.10.0
0.9.2
0.9.1
0.9.0
0.8.25
0.8.24
0.8.23
0.8.22
0.8.21
0.8.20
0.8.19
0.8.18
0.8.17
0.8.16
0.8.15
0.8.14
0.8.13
0.8.12
0.8.11
0.8.10
0.8.9
0.8.8
0.8.7
0.8.6
0.8.5
0.8.4
0.8.3
0.8.2
0.8.1
0.8.0
0.7.30
0.7.29
0.7.28
0.7.27
0.7.26
0.7.25
0.7.24
0.7.23
0.7.22
0.7.21
0.7.20
0.7.19
0.7.18
0.7.17
0.7.16
0.7.15
0.7.14
0.7.13
0.7.12
0.7.11
0.7.10
0.7.9
0.7.8
0.7.7
0.7.6
0.7.5
0.7.4
0.7.3
0.7.2
0.7.1
0.7.0
0.6.7
0.6.6
0.6.5
0.6.4
0.6.3
0.6.2
0.6.1
0.6.0
0.5.0
0.4.4
0.4.3
0.4.2
0.4.1
0.4.0
0.3.4
0.3.3
0.3.2
0.3.1
Macula HTTP/3 Mesh SDK — connect, subscribe, publish, call, advertise
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Files
src/macula_id.erl
%%%-------------------------------------------------------------------
%%% @doc
%%% ID generation utilities for Macula.
%%% Provides functions for generating various types of IDs.
%%% @end
%%%-------------------------------------------------------------------
-module(macula_id).
%% API
-export([
node_id/0,
message_id/0,
session_id/0,
hash_id/1,
to_uuid/1,
from_uuid/1,
to_hex/1,
from_hex/1
]).
%%%===================================================================
%%% API Functions
%%%===================================================================
%% @doc Generate 256-bit (32-byte) random node ID.
-spec node_id() -> binary().
node_id() ->
crypto:strong_rand_bytes(32).
%% @doc Generate 128-bit (16-byte) random message ID.
-spec message_id() -> binary().
message_id() ->
crypto:strong_rand_bytes(16).
%% @doc Generate 128-bit (16-byte) random session ID.
-spec session_id() -> binary().
session_id() ->
crypto:strong_rand_bytes(16).
%% @doc Generate deterministic 256-bit hash ID from data.
-spec hash_id(binary()) -> binary().
hash_id(Data) when is_binary(Data) ->
crypto:hash(sha256, Data).
%% @doc Convert 16-byte or 32-byte binary ID to UUID string format.
%% For 16-byte: 8-4-4-4-12 (e.g., "12345678-90ab-cdef-1234-567890abcdef")
%% For 32-byte: Uses first 16 bytes
-spec to_uuid(binary()) -> binary().
to_uuid(<<A:32, B:16, C:16, D:16, E:48, _Rest/binary>>) ->
%% Handles both 16-byte and 32-byte inputs (uses first 16 bytes)
list_to_binary(
io_lib:format("~8.16.0b-~4.16.0b-~4.16.0b-~4.16.0b-~12.16.0b",
[A, B, C, D, E])
).
%% @doc Convert UUID string to 16-byte binary ID.
%% Crashes on invalid UUID format - exposes bugs in validation logic.
-spec from_uuid(binary()) -> binary().
from_uuid(Uuid) when is_binary(Uuid), byte_size(Uuid) =:= 36 ->
%% Parse UUID format: 8-4-4-4-12 (let it crash on invalid format)
<<A:8/binary, $-, B:4/binary, $-, C:4/binary, $-,
D:4/binary, $-, E:12/binary>> = Uuid,
%% Convert hex strings to integers (let it crash on invalid hex)
AInt = binary_to_integer(A, 16),
BInt = binary_to_integer(B, 16),
CInt = binary_to_integer(C, 16),
DInt = binary_to_integer(D, 16),
EInt = binary_to_integer(E, 16),
%% Pack into binary
<<AInt:32, BInt:16, CInt:16, DInt:16, EInt:48>>.
%% @doc Convert binary to lowercase hex string.
-spec to_hex(binary()) -> binary().
to_hex(Binary) when is_binary(Binary) ->
list_to_binary([io_lib:format("~2.16.0b", [B]) || <<B>> <= Binary]).
%% @doc Convert hex string to binary.
%% Crashes on invalid hex - exposes bugs in validation logic.
-spec from_hex(binary()) -> binary().
from_hex(Hex) when is_binary(Hex), byte_size(Hex) rem 2 =:= 0 ->
%% Parse hex string (let it crash on invalid hex characters)
Bytes = [binary_to_integer(<<H, L>>, 16) || <<H, L>> <= Hex],
list_to_binary(Bytes).