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, 9 insertions, 8 deletions

diff --git a/libcmix-crypto/elgamal/gcrypt/gcrypt_elgamal.c b/libcmix-crypto/elgamal/gcrypt/gcrypt_elgamal.c
index a0512dd..c610556 100644
--- a/libcmix-crypto/elgamal/gcrypt/gcrypt_elgamal.c
+++ b/libcmix-crypto/elgamal/gcrypt/gcrypt_elgamal.c
@@ -152,11 +152,15 @@ GroupElement gcrypt_elgamal_multiply(GroupElement lh, GroupElement rh, bool secu
 	return ret;
 }
 
+size_t gcrypt_elgamal_get_group_element_array_size() {
+	return 256u;
+}
+
 void gcrypt_elgamal_delete_group_element(void* el) {
 	gcry_mpi_release((gcry_mpi_t) el);
 }
 
-void gcrypt_elgamal_add_public_share(char** buffer, size_t* out_len, char const* share, size_t in_len, void* pubkey) {
+void gcrypt_elgamal_add_public_share(GroupElement* el, char const* share, size_t in_len, void* pubkey) {
 	
 	gcry_error_t error;
 	size_t parse_error_pos;
@@ -170,14 +174,12 @@ void gcrypt_elgamal_add_public_share(char** buffer, size_t* out_len, char const*
 	gcry_mpi_t result = gcry_mpi_new(0);
 	gcry_mpi_mulm(result, mpi_share, y, p);
 	
-	error = gcry_mpi_aprint(GCRYMPI_FMT_USG, (unsigned char**) buffer, out_len, result);
-	check(error);
+	*el = result;
 	
 	gcry_mpi_release(mpi_share);
-	gcry_mpi_release(result);
 }
 
-struct SharedKey gcrypt_elgamal_derive_shared_key(struct KeyPair keypair, unsigned char const* other_pub, size_t pub_len, unsigned char const* value, size_t value_len, void* priv_value, bool swap) {
+GroupElement gcrypt_elgamal_derive_shared_key(struct KeyPair keypair, unsigned char const* other_pub, size_t pub_len, unsigned char const* value, size_t value_len, void* priv_value, bool swap) {
 
 	gcry_error_t error;
 	size_t parse_error_pos;
@@ -192,9 +194,7 @@ struct SharedKey gcrypt_elgamal_derive_shared_key(struct KeyPair keypair, unsign
 
 	gcry_mpi_release(ga);
 
-	return (struct SharedKey){
-		gab
-	};
+	return gab;
 }
 
 void gcrypt_elgamal_delete_shared_key(struct SharedKey* s) {
@@ -241,6 +241,7 @@ GroupElementGetter elgamal_get_group_element = &gcrypt_elgamal_get_group_element
 GroupElementDeleter elgamal_delete_group_element = &gcrypt_elgamal_delete_group_element;
 KeyExchangeValueGetter elgamal_get_key_exchange_value = &gcrypt_elgamal_get_key_exchange_value;
 GroupElementMultiplier elgamal_multiply = &gcrypt_elgamal_multiply;
+GroupElementArraySizeGetter elgamal_get_group_element_array_size = &gcrypt_elgamal_get_group_element_array_size;
 PublicShareAdder elgamal_add_public_share = &gcrypt_elgamal_add_public_share;
 SharedKeyDeriver elgamal_derive_shared_key = &gcrypt_elgamal_derive_shared_key;
 SharedKeyDeleter elgamal_delete_shared_key = &gcrypt_elgamal_delete_shared_key;