Moves cmix calculation stuff outisde of the node class.

Moves the computations and cryptography to the the libcmix library
where we can group and memory manage the underlying crypto-library.

1 files changed, 43 insertions, 0 deletions

diff --git a/libcmix/cmix.h b/libcmix/cmix.h
index e0d9961..3877382 100644
--- a/libcmix/cmix.h
+++ b/libcmix/cmix.h
@@ -1,7 +1,12 @@
+#pragma once
+
 #ifdef __cplusplus
 extern "C" {
 #endif
 
+#include "api.h"
+#include "keypair.h"
+#include "groupelement.h"
 #include "bignum.h"
 
 /*!
@@ -26,6 +31,7 @@ enum cmix_error {
 	no_error = 0,
 	index_out_of_range = 1000,
 	cmix_bignum_error = 2000,
+	out_of_memory = 4000,
 };
 
 /*!
@@ -63,6 +69,43 @@ enum cmix_error set_message(char const* message, struct CMixBuffer b, unsigned i
  */
 enum cmix_error calculate_shared_key_part(struct Bignum* result, struct Bignum partial_shared, struct Bignum my_share, struct Bignum mod);
 
+struct CMixContext {
+	struct Api api;
+	struct KeyPair keypair;
+	GroupElement network_key;
+	size_t nr_participants;
+	GroupElement* r;
+	GroupElement* s;
+	unsigned int* permutation;
+	GroupElement* pirs;
+};
+
+struct CMixContext initialize_cmix_context(struct Api api);
+
+void deinitialize(struct CMixContext* ctx);
+
+enum cmix_error initialize_keypair(struct CMixContext* ctx);
+
+enum cmix_error get_public_key(struct CMixContext const* ctx, char* buffer);
+
+enum cmix_error add_public_share(struct CMixContext const* ctx, char* buffer, char const* share);
+
+enum cmix_error start_mix(struct CMixContext* ctx, size_t nr_participants);
+
+enum cmix_error initialize_mix_randomness(struct CMixContext* ctx);
+
+size_t get_group_element_array_size(struct CMixContext const* ctx);
+
+enum cmix_error set_network_key(struct CMixContext* ctx, char const* buffer, size_t len);
+
+enum cmix_error encrypt_r(struct CMixContext const* ctx, char* random_buffer, char* message_buffer, size_t index);
+
+enum cmix_error encrypt_r_and_multiply(struct CMixContext const* ctx, char* random_buffer, char* message_buffer, char const* random_element, char const* message_element, size_t index);
+
+enum cmix_error multiply_s(struct CMixContext const* ctx, char* r_out_buffer, char* m_out_buffer, char const* r_in_buffer, char const* m_in_buffer, size_t index);
+
+enum cmix_error key_exchange(struct CMixContext const* ctx, GroupElement* shared_key, char* public_key_buffer, char* exhange_value_buffer, char const* pubkey, char const* value);
+
 #ifdef __cplusplus
 } // extern "C"
 #endif