libaxolotl - initial commit

git-svn-id: http://svn.miranda-ng.org/main/trunk@16169 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c

1 files changed, 149 insertions, 0 deletions

diff --git a/libs/libaxolotl/src/group_session_builder.c b/libs/libaxolotl/src/group_session_builder.c
new file mode 100644
index 0000000000..4ac825b142
--- /dev/null
+++ b/libs/libaxolotl/src/group_session_builder.c
@@ -0,0 +1,149 @@
+#include "group_session_builder.h"
+
+#include <assert.h>
+#include <string.h>
+#include "axolotl_internal.h"
+#include "sender_key_record.h"
+#include "sender_key_state.h"
+#include "sender_key.h"
+#include "protocol.h"
+#include "key_helper.h"
+
+struct group_session_builder
+{
+    axolotl_store_context *store;
+    axolotl_context *global_context;
+};
+
+int group_session_builder_create(group_session_builder **builder,
+        axolotl_store_context *store, axolotl_context *global_context)
+{
+    group_session_builder *result = 0;
+
+    assert(store);
+    assert(global_context);
+
+    result = malloc(sizeof(group_session_builder));
+    if(!result) {
+        return AX_ERR_NOMEM;
+    }
+    memset(result, 0, sizeof(group_session_builder));
+
+    result->store = store;
+    result->global_context = global_context;
+
+    *builder = result;
+    return 0;
+}
+
+int group_session_builder_process_session(group_session_builder *builder,
+        const axolotl_sender_key_name *sender_key_name,
+        sender_key_distribution_message *distribution_message)
+{
+    int result = 0;
+    sender_key_record *record = 0;
+
+    assert(builder);
+    assert(builder->store);
+    axolotl_lock(builder->global_context);
+
+    result = axolotl_sender_key_load_key(builder->store, &record, sender_key_name);
+    if(result < 0) {
+        goto complete;
+    }
+
+    result = sender_key_record_add_sender_key_state(record,
+            sender_key_distribution_message_get_id(distribution_message),
+            sender_key_distribution_message_get_iteration(distribution_message),
+            sender_key_distribution_message_get_chain_key(distribution_message),
+            sender_key_distribution_message_get_signature_key(distribution_message));
+    if(result < 0) {
+        goto complete;
+    }
+
+    result = axolotl_sender_key_store_key(builder->store, sender_key_name, record);
+
+complete:
+    AXOLOTL_UNREF(record);
+    axolotl_unlock(builder->global_context);
+    return result;
+}
+
+int group_session_builder_create_session(group_session_builder *builder,
+        sender_key_distribution_message **distribution_message,
+        const axolotl_sender_key_name *sender_key_name)
+{
+    int result = 0;
+    sender_key_record *record = 0;
+    sender_key_state *state = 0;
+    uint32_t sender_key_id = 0;
+    axolotl_buffer *sender_key = 0;
+    ec_key_pair *sender_signing_key = 0;
+    sender_chain_key *chain_key = 0;
+    axolotl_buffer *seed = 0;
+
+    assert(builder);
+    assert(builder->store);
+    axolotl_lock(builder->global_context);
+
+    result = axolotl_sender_key_load_key(builder->store, &record, sender_key_name);
+    if(result < 0) {
+        goto complete;
+    }
+
+    if(sender_key_record_is_empty(record)) {
+        result = axolotl_key_helper_generate_sender_key_id(&sender_key_id, builder->global_context);
+        if(result < 0) {
+            goto complete;
+        }
+
+        result = axolotl_key_helper_generate_sender_key(&sender_key, builder->global_context);
+        if(result < 0) {
+            goto complete;
+        }
+
+        result = axolotl_key_helper_generate_sender_signing_key(&sender_signing_key, builder->global_context);
+        if(result < 0) {
+            goto complete;
+        }
+
+        result = sender_key_record_set_sender_key_state(record, sender_key_id, 0, sender_key, sender_signing_key);
+        if(result < 0) {
+            goto complete;
+        }
+
+        result = axolotl_sender_key_store_key(builder->store, sender_key_name, record);
+        if(result < 0) {
+            goto complete;
+        }
+    }
+
+    result = sender_key_record_get_sender_key_state(record, &state);
+    if(result < 0) {
+        goto complete;
+    }
+
+    chain_key = sender_key_state_get_chain_key(state);
+    seed = sender_chain_key_get_seed(chain_key);
+
+    result = sender_key_distribution_message_create(distribution_message,
+            sender_key_state_get_key_id(state),
+            sender_chain_key_get_iteration(chain_key),
+            axolotl_buffer_data(seed), axolotl_buffer_len(seed),
+            sender_key_state_get_signing_key_public(state),
+            builder->global_context);
+
+complete:
+    axolotl_buffer_free(sender_key);
+    AXOLOTL_UNREF(sender_signing_key);
+    AXOLOTL_UNREF(record);
+    axolotl_unlock(builder->global_context);
+    return result;
+}
+
+void group_session_builder_free(group_session_builder *builder)
+{
+    if(builder) {
+        free(builder);
+    }
+}