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ssb: Allow encrypting/decrypting with the server identity as an admin.

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This commit is contained in:
Cory McWilliams 2024-12-10 12:43:07 -05:00
parent ea70299a45
commit 954830be18
4 changed files with 37 additions and 18 deletions
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4
src/httpd.js.c
View File

@ -1360,7 +1360,7 @@ static void _httpd_endpoint_save_work(tf_ssb_t* ssb, void* user_data)
user_app_t* user_app = _parse_user_app_from_path(request->path, "/save");
if (user_app)
{
if (strcmp(user_string, user_app->user) == 0 || (strcmp(user_app->user, "core") == 0 && tf_ssb_db_user_has_permission(ssb, user_string, "administration")))
if (strcmp(user_string, user_app->user) == 0 || (strcmp(user_app->user, "core") == 0 && tf_ssb_db_user_has_permission(ssb, NULL, user_string, "administration")))
{
size_t path_length = strlen("path:") + strlen(user_app->app) + 1;
char* app_path = tf_malloc(path_length);
@ -1516,7 +1516,7 @@ static void _httpd_endpoint_delete_work(tf_ssb_t* ssb, void* user_data)
user_app_t* user_app = _parse_user_app_from_path(request->path, "/delete");
if (user_app)
{
if (strcmp(user_string, user_app->user) == 0 || (strcmp(user_app->user, "core") == 0 && tf_ssb_db_user_has_permission(ssb, user_string, "administration")))
if (strcmp(user_string, user_app->user) == 0 || (strcmp(user_app->user, "core") == 0 && tf_ssb_db_user_has_permission(ssb, NULL, user_string, "administration")))
{
size_t path_length = strlen("path:") + strlen(user_app->app) + 1;
char* app_path = tf_malloc(path_length);

11
src/ssb.db.c
View File

@ -2007,12 +2007,12 @@ bool tf_ssb_db_verify(tf_ssb_t* ssb, const char* id)
return verified;
}
bool tf_ssb_db_user_has_permission(tf_ssb_t* ssb, const char* id, const char* permission)
bool tf_ssb_db_user_has_permission(tf_ssb_t* ssb, sqlite3* db, const char* id, const char* permission)
{
bool has_permission = false;
sqlite3* db = tf_ssb_acquire_db_reader(ssb);
sqlite3* reader = db ? db : tf_ssb_acquire_db_reader(ssb);
sqlite3_stmt* statement = NULL;
if (sqlite3_prepare(db,
if (sqlite3_prepare(reader,
"SELECT COUNT(*) FROM properties, json_each(properties.value -> 'permissions' -> ?) AS permission WHERE properties.id = 'core' AND properties.key = 'settings' AND "
"permission.value = ?",
-1, &statement, NULL) == SQLITE_OK)
@ -2024,6 +2024,9 @@ bool tf_ssb_db_user_has_permission(tf_ssb_t* ssb, const char* id, const char* pe
}
sqlite3_finalize(statement);
}
tf_ssb_release_db_reader(ssb, db);
if (reader != db)
{
tf_ssb_release_db_reader(ssb, reader);
}
return has_permission;
}

3
src/ssb.db.h
View File

@ -448,11 +448,12 @@ bool tf_ssb_db_verify(tf_ssb_t* ssb, const char* id);
/**
** Check if a user has a specific permission.
** @param ssb The SSB instance.
** @param db Optional database instance. If NULL, one will be acquired from ssb.
** @param id The user ID.
** @param permission The name of the permission.
** @return true If the user has the requested permission.
*/
bool tf_ssb_db_user_has_permission(tf_ssb_t* ssb, const char* id, const char* permission);
bool tf_ssb_db_user_has_permission(tf_ssb_t* ssb, sqlite3* db, const char* id, const char* permission);
/**
** An SQLite authorizer callback. See https://www.sqlite.org/c3ref/set_authorizer.html for use.

37
src/ssb.js.c
View File

@ -368,9 +368,9 @@ typedef struct _swap_with_server_identity_t
static void _tf_ssb_swap_with_server_identity_work(tf_ssb_t* ssb, void* user_data)
{
swap_with_server_identity_t* work = user_data;
if (tf_ssb_db_user_has_permission(ssb, work->user, "administration"))
sqlite3* db = tf_ssb_acquire_db_writer(ssb);
if (tf_ssb_db_user_has_permission(ssb, db, work->user, "administration"))
{
sqlite3* db = tf_ssb_acquire_db_writer(ssb);
char* error = NULL;
if (sqlite3_exec(db, "BEGIN TRANSACTION", NULL, NULL, &error) == SQLITE_OK)
{
@ -404,12 +404,12 @@ static void _tf_ssb_swap_with_server_identity_work(tf_ssb_t* ssb, void* user_dat
{
work->error = error ? tf_strdup(error) : tf_strdup(sqlite3_errmsg(db));
}
tf_ssb_release_db_writer(ssb, db);
}
else
{
work->error = tf_strdup("not administrator");
}
tf_ssb_release_db_writer(ssb, db);
}
static void _tf_ssb_swap_with_server_identity_after_work(tf_ssb_t* ssb, int status, void* user_data)
@ -480,7 +480,7 @@ static void _tf_ssb_getIdentities_visit(const char* identity, void* user_data)
static void _tf_ssb_get_identities_work(tf_ssb_t* ssb, void* user_data)
{
identities_visit_t* work = user_data;
if (tf_ssb_db_user_has_permission(ssb, work->user, "administration"))
if (tf_ssb_db_user_has_permission(ssb, NULL, work->user, "administration"))
{
char id[k_id_base64_len] = "";
if (tf_ssb_whoami(ssb, id, sizeof(id)))
@ -552,7 +552,7 @@ static void _tf_ssb_get_private_key_work(tf_ssb_t* ssb, void* user_data)
{
get_private_key_t* work = user_data;
work->got_private_key = tf_ssb_db_identity_get_private_key(ssb, work->user, work->id, work->private_key, sizeof(work->private_key));
if (!work->got_private_key && tf_ssb_db_user_has_permission(ssb, work->user, "administration"))
if (!work->got_private_key && tf_ssb_db_user_has_permission(ssb, NULL, work->user, "administration"))
{
work->got_private_key = tf_ssb_db_identity_get_private_key(ssb, ":admin", work->id, work->private_key, sizeof(work->private_key));
}
@ -658,7 +658,7 @@ static void _tf_ssb_getActiveIdentity_work(tf_ssb_t* ssb, void* user_data)
tf_ssb_db_identity_visit(ssb, request->name, _tf_ssb_getActiveIdentity_visit, request);
}
if (!*request->identity && tf_ssb_db_user_has_permission(ssb, request->name, "administration"))
if (!*request->identity && tf_ssb_db_user_has_permission(ssb, NULL, request->name, "administration"))
{
tf_ssb_whoami(ssb, request->identity, sizeof(request->identity));
}
@ -742,7 +742,7 @@ static void _tf_ssb_getIdentityInfo_work(tf_ssb_t* ssb, void* user_data)
{
identity_info_work_t* request = user_data;
char id[k_id_base64_len] = "";
if (tf_ssb_db_user_has_permission(ssb, request->name, "administration"))
if (tf_ssb_db_user_has_permission(ssb, NULL, request->name, "administration"))
{
if (tf_ssb_whoami(ssb, id, sizeof(id)))
{
@ -904,7 +904,7 @@ static void _tf_ssb_append_message_with_identity_get_key_work(tf_ssb_t* ssb, voi
{
append_message_t* work = user_data;
work->got_private_key = tf_ssb_db_identity_get_private_key(ssb, work->user, work->id, work->private_key, sizeof(work->private_key));
if (!work->got_private_key && tf_ssb_db_user_has_permission(ssb, work->user, "administration"))
if (!work->got_private_key && tf_ssb_db_user_has_permission(ssb, NULL, work->user, "administration"))
{
work->got_private_key = tf_ssb_db_identity_get_private_key(ssb, ":admin", work->id, work->private_key, sizeof(work->private_key));
}
@ -1974,7 +1974,7 @@ enum
k_max_private_message_recipients = 8
};
static bool _tf_ssb_get_private_key_curve25519(sqlite3* db, const char* user, const char* identity, uint8_t out_private_key[static crypto_sign_SECRETKEYBYTES])
static bool _tf_ssb_get_private_key_curve25519_internal(sqlite3* db, const char* user, const char* identity, uint8_t out_private_key[static crypto_sign_SECRETKEYBYTES])
{
if (!user || !identity)
{
@ -2003,6 +2003,21 @@ static bool _tf_ssb_get_private_key_curve25519(sqlite3* db, const char* user, co
return success;
}
static bool _tf_ssb_get_private_key_curve25519(tf_ssb_t* ssb, sqlite3* db, const char* user, const char* identity, uint8_t out_private_key[static crypto_sign_SECRETKEYBYTES])
{
if (_tf_ssb_get_private_key_curve25519_internal(db, user, identity, out_private_key))
{
return true;
}
if (tf_ssb_db_user_has_permission(ssb, db, user, "administration"))
{
return _tf_ssb_get_private_key_curve25519_internal(db, ":admin", identity, out_private_key);
}
return false;
}
typedef struct _private_message_encrypt_t
{
const char* signer_user;
@ -2025,7 +2040,7 @@ static void _tf_ssb_private_message_encrypt_work(tf_ssb_t* ssb, void* user_data)
uint8_t private_key[crypto_sign_SECRETKEYBYTES] = { 0 };
sqlite3* db = tf_ssb_acquire_db_reader(ssb);
bool found = _tf_ssb_get_private_key_curve25519(db, work->signer_user, work->signer_identity, private_key);
bool found = _tf_ssb_get_private_key_curve25519(ssb, db, work->signer_user, work->signer_identity, private_key);
tf_ssb_release_db_reader(ssb, db);
if (found)
@ -2214,7 +2229,7 @@ static void _tf_ssb_private_message_decrypt_work(tf_ssb_t* ssb, void* user_data)
uint8_t private_key[crypto_sign_SECRETKEYBYTES] = { 0 };
sqlite3* db = tf_ssb_acquire_db_reader(ssb);
bool found = _tf_ssb_get_private_key_curve25519(db, work->user, work->identity, private_key);
bool found = _tf_ssb_get_private_key_curve25519(ssb, db, work->user, work->identity, private_key);
tf_ssb_release_db_reader(ssb, db);
if (found)