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-rw-r--r--include/olm/message.h7
-rw-r--r--src/inbound_group_session.c4
-rw-r--r--src/message.cpp18
-rw-r--r--src/outbound_group_session.c3
-rw-r--r--tests/test_message.cpp23
5 files changed, 10 insertions, 45 deletions
diff --git a/include/olm/message.h b/include/olm/message.h
index e80d54c..5eb504d 100644
--- a/include/olm/message.h
+++ b/include/olm/message.h
@@ -35,7 +35,6 @@ extern "C" {
* The length of the buffer needed to hold a group message.
*/
size_t _olm_encode_group_message_length(
- size_t group_session_id_length,
uint32_t chain_index,
size_t ciphertext_length,
size_t mac_length
@@ -45,8 +44,6 @@ size_t _olm_encode_group_message_length(
* Writes the message headers into the output buffer.
*
* version: version number of the olm protocol
- * session_id: group session identifier
- * session_id_length: length of session_id
* message_index: message index
* ciphertext_length: length of the ciphertext
* output: where to write the output. Should be at least
@@ -58,8 +55,6 @@ size_t _olm_encode_group_message_length(
*/
size_t _olm_encode_group_message(
uint8_t version,
- const uint8_t *session_id,
- size_t session_id_length,
uint32_t message_index,
size_t ciphertext_length,
uint8_t *output,
@@ -69,8 +64,6 @@ size_t _olm_encode_group_message(
struct _OlmDecodeGroupMessageResults {
uint8_t version;
- const uint8_t *session_id;
- size_t session_id_length;
uint32_t message_index;
int has_message_index;
const uint8_t *ciphertext;
diff --git a/src/inbound_group_session.c b/src/inbound_group_session.c
index e171205..ce26033 100644
--- a/src/inbound_group_session.c
+++ b/src/inbound_group_session.c
@@ -231,9 +231,7 @@ static size_t _decrypt(
return (size_t)-1;
}
- if (!decoded_results.has_message_index || !decoded_results.session_id
- || !decoded_results.ciphertext
- ) {
+ if (!decoded_results.has_message_index || !decoded_results.ciphertext ) {
session->last_error = OLM_BAD_MESSAGE_FORMAT;
return (size_t)-1;
}
diff --git a/src/message.cpp b/src/message.cpp
index 2e841e5..ad26cb9 100644
--- a/src/message.cpp
+++ b/src/message.cpp
@@ -328,18 +328,15 @@ void olm::decode_one_time_key_message(
-static const std::uint8_t GROUP_SESSION_ID_TAG = 012;
-static const std::uint8_t GROUP_MESSAGE_INDEX_TAG = 020;
-static const std::uint8_t GROUP_CIPHERTEXT_TAG = 032;
+static const std::uint8_t GROUP_MESSAGE_INDEX_TAG = 010;
+static const std::uint8_t GROUP_CIPHERTEXT_TAG = 022;
size_t _olm_encode_group_message_length(
- size_t group_session_id_length,
uint32_t message_index,
size_t ciphertext_length,
size_t mac_length
) {
size_t length = VERSION_LENGTH;
- length += 1 + varstring_length(group_session_id_length);
length += 1 + varint_length(message_index);
length += 1 + varstring_length(ciphertext_length);
length += mac_length;
@@ -349,19 +346,14 @@ size_t _olm_encode_group_message_length(
size_t _olm_encode_group_message(
uint8_t version,
- const uint8_t *session_id,
- size_t session_id_length,
uint32_t message_index,
size_t ciphertext_length,
uint8_t *output,
uint8_t **ciphertext_ptr
) {
std::uint8_t * pos = output;
- std::uint8_t * session_id_pos;
*(pos++) = version;
- pos = encode(pos, GROUP_SESSION_ID_TAG, session_id_pos, session_id_length);
- std::memcpy(session_id_pos, session_id, session_id_length);
pos = encode(pos, GROUP_MESSAGE_INDEX_TAG, message_index);
pos = encode(pos, GROUP_CIPHERTEXT_TAG, *ciphertext_ptr, ciphertext_length);
return pos-output;
@@ -376,8 +368,6 @@ void _olm_decode_group_message(
std::uint8_t const * end = input + input_length - mac_length;
std::uint8_t const * unknown = nullptr;
- results->session_id = nullptr;
- results->session_id_length = 0;
bool has_message_index = false;
results->message_index = 0;
results->ciphertext = nullptr;
@@ -389,10 +379,6 @@ void _olm_decode_group_message(
while (pos != end) {
pos = decode(
- pos, end, GROUP_SESSION_ID_TAG,
- results->session_id, results->session_id_length
- );
- pos = decode(
pos, end, GROUP_MESSAGE_INDEX_TAG,
results->message_index, has_message_index
);
diff --git a/src/outbound_group_session.c b/src/outbound_group_session.c
index 9b2298a..2a6c220 100644
--- a/src/outbound_group_session.c
+++ b/src/outbound_group_session.c
@@ -187,7 +187,7 @@ static size_t raw_message_length(
mac_length = megolm_cipher->ops->mac_length(megolm_cipher);
return _olm_encode_group_message_length(
- GROUP_SESSION_ID_LENGTH, session->ratchet.counter,
+ session->ratchet.counter,
ciphertext_length, mac_length);
}
@@ -220,7 +220,6 @@ static size_t _encrypt(
*/
message_length = _olm_encode_group_message(
OLM_PROTOCOL_VERSION,
- session->session_id, GROUP_SESSION_ID_LENGTH,
session->ratchet.counter,
ciphertext_length,
buffer,
diff --git a/tests/test_message.cpp b/tests/test_message.cpp
index 30c10a0..06b36dc 100644
--- a/tests/test_message.cpp
+++ b/tests/test_message.cpp
@@ -67,12 +67,8 @@ assert_equals(message2, output, 35);
TestCase test_case("Group message encode test");
- const uint8_t session_id[] = "sessionid";
- size_t session_id_len = 9;
-
- size_t length = _olm_encode_group_message_length(
- session_id_len, 200, 10, 8);
- size_t expected_length = 1 + (2+session_id_len) + (1+2) + (2+10) + 8;
+ size_t length = _olm_encode_group_message_length(200, 10, 8);
+ size_t expected_length = 1 + (1+2) + (2+10) + 8;
assert_equals(expected_length, length);
uint8_t output[50];
@@ -80,7 +76,6 @@ assert_equals(message2, output, 35);
_olm_encode_group_message(
3,
- session_id, session_id_len,
200, // counter
10, // ciphertext length
output,
@@ -89,9 +84,8 @@ assert_equals(message2, output, 35);
uint8_t expected[] =
"\x03"
- "\x0A\x09sessionid"
- "\x10\xC8\x01"
- "\x1A\x0A";
+ "\x08\xC8\x01"
+ "\x12\x0A";
assert_equals(expected, output, sizeof(expected)-1);
assert_equals(output+sizeof(expected)-1, ciphertext_ptr);
@@ -103,17 +97,12 @@ assert_equals(message2, output, 35);
struct _OlmDecodeGroupMessageResults results;
std::uint8_t message[] =
"\x03"
- "\x0A\x09sessionid"
- "\x10\xC8\x01"
- "\x1A\x0A" "ciphertext"
+ "\x08\xC8\x01"
+ "\x12\x0A" "ciphertext"
"hmacsha2";
- const uint8_t expected_session_id[] = "sessionid";
-
_olm_decode_group_message(message, sizeof(message)-1, 8, &results);
assert_equals(std::uint8_t(3), results.version);
- assert_equals(std::size_t(9), results.session_id_length);
- assert_equals(expected_session_id, results.session_id, 9);
assert_equals(1, results.has_message_index);
assert_equals(std::uint32_t(200), results.message_index);
assert_equals(std::size_t(10), results.ciphertext_length);
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-29 08:46:53 +0000