5 files changed, 75 insertions, 0 deletions
diff --git a/libcmix-crypto/elgamal/CMakeLists.txt b/libcmix-crypto/elgamal/CMakeLists.txt
new file mode 100644
index 0000000..88f5ba8
--- /dev/null
+++ b/libcmix-crypto/elgamal/CMakeLists.txt
@@ -0,0 +1,29 @@
+add_library(elgamal-interface INTERFACE)
+
+target_include_directories(elgamal-interface
+	INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}
+)
+
+target_sources(elgamal-interface
+	INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}/elgamal.h
+)
+
+target_link_libraries(elgamal-interface
+	INTERFACE cmix-crypto-interface
+)
+
+foreach(impl ${elgamal_implementations})
+	add_subdirectory(${impl})
+endforeach()
+
+add_library(elgamal-implementation
+	elgamal.h elgamal.c
+)
+
+target_include_directories(elgamal-implementation
+	PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}
+)
+
+target_link_libraries(elgamal-implementation
+	PUBLIC elgamal-${elgamal_implementation}
+)	
diff --git a/libcmix-crypto/elgamal/elgamal.c b/libcmix-crypto/elgamal/elgamal.c
new file mode 100644
index 0000000..3136688
--- /dev/null
+++ b/libcmix-crypto/elgamal/elgamal.c
@@ -0,0 +1,11 @@
+#include "elgamal.h"
+
+struct Api get_elgamal_implementation()
+{
+	return (struct Api) {
+		&elgamal_create_keypair,
+		&elgamal_keypair_deleter,
+		&elgamal_derive_shared_key,
+		&elgamal_shared_key_deleter
+	};
+}
diff --git a/libcmix-crypto/elgamal/elgamal.h b/libcmix-crypto/elgamal/elgamal.h
new file mode 100644
index 0000000..77b5c9b
--- /dev/null
+++ b/libcmix-crypto/elgamal/elgamal.h
@@ -0,0 +1,19 @@
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "api.h"
+
+extern struct KeyPair elgamal_create_keypair();
+extern void elgamal_keypair_deleter(struct KeyPair p);
+
+extern struct SharedKey elgamal_derive_shared_key(struct KeyPair pair, unsigned char* pub_key, bool swap_pub_order);
+extern void elgamal_shared_key_deleter(struct SharedKey s);
+
+struct Api get_elgamal_implementation();
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/libcmix-crypto/elgamal/null/CMakeLists.txt b/libcmix-crypto/elgamal/null/CMakeLists.txt
new file mode 100644
index 0000000..39db0f0
--- /dev/null
+++ b/libcmix-crypto/elgamal/null/CMakeLists.txt
@@ -0,0 +1,16 @@
+include(get_target_name)
+
+get_target_name(target_name)
+
+add_library(${target_name} SHARED
+	null_elgamal.c
+)
+
+target_compile_options(${target_name}
+	PRIVATE -std=c99
+)
+
+target_link_libraries(${target_name}
+	INTERFACE cmix-crypto
+	PRIVATE elgamal-interface
+)
diff --git a/libcmix-crypto/elgamal/null/null_elgamal.c b/libcmix-crypto/elgamal/null/null_elgamal.c
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/libcmix-crypto/elgamal/null/null_elgamal.c