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-rw-r--r--src/account.cpp154
1 files changed, 60 insertions, 94 deletions
diff --git a/src/account.cpp b/src/account.cpp
index 6a76583..796b06e 100644
--- a/src/account.cpp
+++ b/src/account.cpp
@@ -69,22 +69,12 @@ std::size_t olm::Account::new_account(
namespace {
-static const uint8_t IDENTITY_JSON_PART_0[] =
- "{\"algorithms\":"
- "[\"m.olm.curve25519-aes-sha256\""
- "],\"device_id\":\"";
-static const uint8_t IDENTITY_JSON_PART_1[] = "\",\"keys\":{\"curve25519:";
-static const uint8_t IDENTITY_JSON_PART_2[] = "\":\"";
-static const uint8_t IDENTITY_JSON_PART_3[] = "\",\"ed25519:";
-static const uint8_t IDENTITY_JSON_PART_4[] = "\":\"";
-static const uint8_t IDENTITY_JSON_PART_5[] = "\"},\"user_id\":\"";
-static const uint8_t IDENTITY_JSON_PART_6[] = "\",\"valid_after_ts\":";
-static const uint8_t IDENTITY_JSON_PART_7[] = ",\"valid_until_ts\":";
-static const uint8_t IDENTITY_JSON_PART_8[] = ",\"signatures\":{\"";
-static const uint8_t IDENTITY_JSON_PART_9[] = "/";
-static const uint8_t IDENTITY_JSON_PART_A[] = "\":{\"ed25519:";
-static const uint8_t IDENTITY_JSON_PART_B[] = "\":\"";
-static const uint8_t IDENTITY_JSON_PART_C[] = "\"}}}";
+
+namespace {
+uint8_t KEY_JSON_ED25519[] = "\"ed25519\":";
+uint8_t KEY_JSON_CURVE25519[] = "\"curve25519\":";
+}
+
std::size_t count_digits(
std::uint64_t value
@@ -130,104 +120,79 @@ std::uint8_t * write_digits(
}
-std::size_t olm::Account::get_identity_json_length(
- std::size_t user_id_length,
- std::size_t device_id_length,
- std::uint64_t valid_after_ts,
- std::uint64_t valid_until_ts
-) {
+std::size_t olm::Account::get_identity_json_length() {
std::size_t length = 0;
- length += sizeof(IDENTITY_JSON_PART_0) - 1;
- length += device_id_length;
- length += sizeof(IDENTITY_JSON_PART_1) - 1;
- length += olm::encode_base64_length(3);
- length += sizeof(IDENTITY_JSON_PART_2) - 1;
+ length += 1; /* { */
+ length += sizeof(KEY_JSON_CURVE25519) - 1;
+ length += 1; /* " */
length += olm::encode_base64_length(
sizeof(identity_keys.curve25519_key.public_key)
);
- length += sizeof(IDENTITY_JSON_PART_3) - 1;
- length += olm::encode_base64_length(3);
- length += sizeof(IDENTITY_JSON_PART_4) - 1;
+ length += 2; /* ", */
+ length += sizeof(KEY_JSON_ED25519) - 1;
+ length += 1; /* " */
length += olm::encode_base64_length(
sizeof(identity_keys.ed25519_key.public_key)
);
- length += sizeof(IDENTITY_JSON_PART_5) - 1;
- length += user_id_length;
- length += sizeof(IDENTITY_JSON_PART_6) - 1;
- length += count_digits(valid_after_ts);
- length += sizeof(IDENTITY_JSON_PART_7) - 1;
- length += count_digits(valid_until_ts);
- length += sizeof(IDENTITY_JSON_PART_8) - 1;
- length += user_id_length;
- length += sizeof(IDENTITY_JSON_PART_9) - 1;
- length += device_id_length;
- length += sizeof(IDENTITY_JSON_PART_A) - 1;
- length += olm::encode_base64_length(3);
- length += sizeof(IDENTITY_JSON_PART_B) - 1;
- length += olm::encode_base64_length(64);
- length += sizeof(IDENTITY_JSON_PART_C) - 1;
+ length += 2; /* "} */
return length;
}
std::size_t olm::Account::get_identity_json(
- std::uint8_t const * user_id, std::size_t user_id_length,
- std::uint8_t const * device_id, std::size_t device_id_length,
- std::uint64_t valid_after_ts,
- std::uint64_t valid_until_ts,
std::uint8_t * identity_json, std::size_t identity_json_length
) {
std::uint8_t * pos = identity_json;
std::uint8_t signature[64];
- size_t expected_length = get_identity_json_length(
- user_id_length, device_id_length, valid_after_ts, valid_until_ts
- );
+ size_t expected_length = get_identity_json_length();
if (identity_json_length < expected_length) {
last_error = olm::ErrorCode::OUTPUT_BUFFER_TOO_SMALL;
return std::size_t(-1);
}
- pos = write_string(pos, IDENTITY_JSON_PART_0);
- pos = write_string(pos, device_id, device_id_length);
- pos = write_string(pos, IDENTITY_JSON_PART_1);
- pos = encode_base64(identity_keys.curve25519_key.public_key, 3, pos);
- pos = write_string(pos, IDENTITY_JSON_PART_2);
- pos = encode_base64(identity_keys.curve25519_key.public_key, 32, pos);
- pos = write_string(pos, IDENTITY_JSON_PART_3);
- pos = encode_base64(identity_keys.ed25519_key.public_key, 3, pos);
- pos = write_string(pos, IDENTITY_JSON_PART_4);
- pos = encode_base64(identity_keys.ed25519_key.public_key, 32, pos);
- pos = write_string(pos, IDENTITY_JSON_PART_5);
- pos = write_string(pos, user_id, user_id_length);
- pos = write_string(pos, IDENTITY_JSON_PART_6);
- pos = write_digits(pos, valid_after_ts);
- pos = write_string(pos, IDENTITY_JSON_PART_7);
- pos = write_digits(pos, valid_until_ts);
- *pos = '}';
- // Sign the JSON up to written up to this point.
- ed25519_sign(
- identity_keys.ed25519_key,
- identity_json, 1 + pos - identity_json,
- signature
+ *(pos++) = '{';
+ pos = write_string(pos, KEY_JSON_CURVE25519);
+ *(pos++) = '\"';
+ pos = olm::encode_base64(
+ identity_keys.curve25519_key.public_key,
+ sizeof(identity_keys.curve25519_key.public_key),
+ pos
);
- // Append the signature to the end of the JSON.
- pos = write_string(pos, IDENTITY_JSON_PART_8);
- pos = write_string(pos, user_id, user_id_length);
- pos = write_string(pos, IDENTITY_JSON_PART_9);
- pos = write_string(pos, device_id, device_id_length);
- pos = write_string(pos, IDENTITY_JSON_PART_A);
- pos = encode_base64(identity_keys.ed25519_key.public_key, 3, pos);
- pos = write_string(pos, IDENTITY_JSON_PART_B);
- pos = encode_base64(signature, 64, pos);
- pos = write_string(pos, IDENTITY_JSON_PART_C);
+ *(pos++) = '\"'; *(pos++) = ',';
+ pos = write_string(pos, KEY_JSON_ED25519);
+ *(pos++) = '\"';
+ pos = olm::encode_base64(
+ identity_keys.ed25519_key.public_key,
+ sizeof(identity_keys.ed25519_key.public_key),
+ pos
+ );
+ *(pos++) = '\"'; *(pos++) = '}';
return pos - identity_json;
}
-namespace {
-uint8_t ONE_TIME_KEY_JSON_ALG[] = "curve25519";
+
+std::size_t olm::Account::signature_length(
+) {
+ return 64;
}
+
+std::size_t olm::Account::sign(
+ std::uint8_t const * message, std::size_t message_length,
+ std::uint8_t * signature, std::size_t signature_length
+) {
+ if (signature_length < this->signature_length()) {
+ last_error = olm::ErrorCode::OUTPUT_BUFFER_TOO_SMALL;
+ return std::size_t(-1);
+ }
+ olm::ed25519_sign(
+ identity_keys.ed25519_key, message, message_length, signature
+ );
+ return this->signature_length();
+}
+
+
std::size_t olm::Account::get_one_time_keys_json_length(
) {
std::size_t length = 0;
@@ -236,18 +201,18 @@ std::size_t olm::Account::get_one_time_keys_json_length(
continue;
}
length += 2; /* {" */
- length += sizeof(ONE_TIME_KEY_JSON_ALG) - 1;
- length += 1; /* : */
length += olm::encode_base64_length(olm::pickle_length(key.id));
length += 3; /* ":" */
length += olm::encode_base64_length(sizeof(key.key.public_key));
length += 1; /* " */
}
- if (length) {
- return length + 1; /* } */
- } else {
- return 2; /* {} */
+ if (length == 0) {
+ /* The list was empty. Add a byte for the opening '{' */
+ length = 1;
}
+ length += 3; /* }{} */
+ length += sizeof(KEY_JSON_CURVE25519) - 1;
+ return length;
}
@@ -259,6 +224,8 @@ std::size_t olm::Account::get_one_time_keys_json(
last_error = olm::ErrorCode::OUTPUT_BUFFER_TOO_SMALL;
return std::size_t(-1);
}
+ *(pos++) = '{';
+ pos = write_string(pos, KEY_JSON_CURVE25519);
std::uint8_t sep = '{';
for (auto const & key : one_time_keys) {
if (key.published) {
@@ -266,8 +233,6 @@ std::size_t olm::Account::get_one_time_keys_json(
}
*(pos++) = sep;
*(pos++) = '\"';
- pos = write_string(pos, ONE_TIME_KEY_JSON_ALG);
- *(pos++) = ':';
std::uint8_t key_id[olm::pickle_length(key.id)];
olm::pickle(key_id, key.id);
pos = olm::encode_base64(key_id, sizeof(key_id), pos);
@@ -282,6 +247,7 @@ std::size_t olm::Account::get_one_time_keys_json(
*(pos++) = sep;
}
*(pos++) = '}';
+ *(pos++) = '}';
return pos - one_time_json;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-08 00:21:43 +0000