Working implementation of elgamal in 2048 bit multiplicative group.

1 files changed, 15 insertions, 8 deletions

diff --git a/libcmix/cmix.c b/libcmix/cmix.c
index 4465011..9db4dbb 100644
--- a/libcmix/cmix.c
+++ b/libcmix/cmix.c
@@ -268,31 +268,38 @@ enum cmix_error post_process(struct CMixContext* ctx, char* r_out, char* m_out,
 	GroupElement msg = ctx->api.array_to_element(m_epirs, get_group_element_array_size(ctx), true);
 	GroupElement pirs = ctx->api.multiply(D, msg, true);
 	element_to_buffer(ctx, m_out, pirs);
-	GroupElement new_r = ctx->api.multiply(x, D, true);
-	element_to_buffer(ctx, r_out, new_r);
+	//GroupElement new_r = ctx->api.multiply(x, D, true);
+	//element_to_buffer(ctx, r_out, new_r);
+	
+	memcpy(r_out, r_epirs, get_group_element_array_size(ctx));
 	
 	ctx->pirs[index] = pirs; // this is not always usable as only the last node will be able to use this effectively, but we store it anyways.
 	
 	ctx->api.free_group_element(x);
 	ctx->api.free_group_element(D);
 	ctx->api.free_group_element(msg);
-	ctx->api.free_group_element(new_r);
+	//ctx->api.free_group_element(new_r);
 	
 	return no_error;
 }
 
 enum cmix_error blind_message(struct CMixContext const* ctx, char* m_out, char const* message, GroupElement const* keys, size_t const nr_nodes) {
-	size_t len = get_group_element_array_size(ctx);
+	size_t len = get_group_element_array_size(ctx); 
+	
+	GroupElement* intermediates = (GroupElement*) calloc(nr_nodes + 1, sizeof(GroupElement));
 	
-	GroupElement mes = ctx->api.array_to_element(message, len, true);
+	intermediates[0] = ctx->api.array_to_element(message, len, true);
 	
 	for(size_t i = 0; i < nr_nodes; ++i) {
-		ctx->api.multiply(mes, mes, keys[i]);
+		intermediates[i+1] = ctx->api.multiply(intermediates[i], keys[i], false);
 	}
 	
-	element_to_buffer(ctx, m_out, mes);
+	element_to_buffer(ctx, m_out, intermediates[nr_nodes]);
 	
-	ctx->api.free_group_element(mes);
+	for(size_t i = 0; i < nr_nodes + 1; ++i) {
+		ctx->api.free_group_element(intermediates[i]);
+	}
+	free(intermediates);
 	
 	return no_error;
 }