Add API for removing used one time keys

include/axolotl/account.hh

@@ -41,6 +41,10 @@ struct Account {
     LocalKey const * lookup_key(
         std::uint32_t id
     );
+
+    std::size_t remove_key(
+        std::uint32_t id
+    );
 };
 
 

include/axolotl/axolotl.hh

@@ -121,6 +121,11 @@ size_t axolotl_matches_inbound_session(
     void * one_time_key_message, size_t message_length
 );
 
+size_t axolotl_remove_one_time_keys(
+    AxolotlAccount * account,
+    AxolotlSession * session
+);
+
 size_t axolotl_encrypt_message_type(
     AxolotlSession * session
 );

src/account.cpp

@@ -11,6 +11,18 @@ axolotl::LocalKey const * axolotl::Account::lookup_key(
     return 0;
 }
 
+std::size_t axolotl::Account::remove_key(
+    std::uint32_t id
+) {
+    LocalKey * i;
+    for (i = one_time_keys.begin(); i != one_time_keys.end(); ++i) {
+        if (i->id == id) {
+            one_time_keys.erase(i);
+            return id;
+        }
+    }
+    return std::size_t(-1);
+}
 
 std::size_t axolotl::Account::new_account_random_length() {
     return 103 * 32;
@@ -21,6 +33,7 @@ std::size_t axolotl::Account::new_account(
 ) {
     if (random_length < new_account_random_length()) {
         last_error = axolotl::ErrorCode::NOT_ENOUGH_RANDOM;
+        return std::size_t(-1);
     }
 
     unsigned id = 0;
@@ -46,8 +59,6 @@ std::size_t axolotl::Account::new_account(
 }
 
 
-
-
 namespace axolotl {
 
 

src/axolotl.cpp

@@ -468,6 +468,20 @@ size_t axolotl_matches_inbound_session(
 }
 
 
+size_t axolotl_remove_one_time_keys(
+    AxolotlAccount * account,
+    AxolotlSession * session
+) {
+    size_t result = from_c(account)->remove_key(
+        from_c(session)->bob_one_time_key_id
+    );
+    if (result == std::size_t(-1)) {
+        from_c(account)->last_error = axolotl::ErrorCode::BAD_MESSAGE_KEY_ID;
+    }
+    return result;
+}
+
+
 size_t axolotl_encrypt_message_type(
     AxolotlSession * session
 ) {