diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..c5941e1
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+bin/*
+obj/*
+
+!.empty
diff --git a/Makefile b/Makefile
index 730b3c9..f79e80b 100644
--- a/Makefile
+++ b/Makefile
@@ -5,7 +5,7 @@ main: main.cpp jsoncpp.o
 	@echo "compilation de aes"
 	@g++ -Wall -Wextra -ggdb -o $(EXEC) $(SRC) obj/jsoncpp.o -lcrypto --std=c++14
 
-jsoncpp.o: jsoncpp.cpp json/json.h json/json-forwards.h
+obj/jsoncpp.o: jsoncpp.cpp json/json.h json/json-forwards.h
 	@echo "compilation de jsoncpp"
 	@g++ -I ../lib/jsoncpp-master/include/ -Wall -Wextra -std=c++11 -c -ggdb jsoncpp.cpp -o obj/jsoncpp.o
 
@@ -15,7 +15,7 @@ run2:
 run:
 	@./$(EXEC) file
 
-decrypt.ex: mainDecrypt.cpp jsoncpp.o aes.hpp
+decrypt.ex: mainDecrypt.cpp obj/jsoncpp.o aes.hpp
 	@echo "compilation de decrypt.ex"
 	@g++ -Wall -Wextra -ggdb -o bin/decrypt.ex mainDecrypt.cpp obj/jsoncpp.o -lcrypto --std=c++14
 
diff --git a/bin/.empty b/bin/.empty
new file mode 100644
index 0000000..e69de29
diff --git a/decrypt.hpp b/decrypt.hpp
index 8c082bd..de5e2f4 100644
--- a/decrypt.hpp
+++ b/decrypt.hpp
@@ -5,7 +5,7 @@
 
 class decrypt : public aes {
 private:
-	    EVP_CIPHER_CTX* aesDecryptCtx;
+	EVP_CIPHER_CTX* aesDecryptCtx;
 public:
 	decrypt(std::string filename, unsigned char* aesKey=0, unsigned char* aesIV=0);
 	decrypt(const decrypt& a);
@@ -16,7 +16,8 @@ public:
 };
 
 decrypt::decrypt(std::string filename, unsigned char* aesKey, unsigned char* aesIV) : aes(filename) {
-	aesDecryptCtx = (EVP_CIPHER_CTX*)malloc(sizeof(EVP_CIPHER_CTX));
+	aesDecryptCtx = EVP_CIPHER_CTX_new();
+	//aesDecryptCtx = (EVP_CIPHER_CTX*)malloc(sizeof(EVP_CIPHER_CTX));
 	if(aesDecryptCtx == NULL) {
         exit(FAILURE);
 	}
@@ -31,7 +32,8 @@ decrypt::decrypt(std::string filename, unsigned char* aesKey, unsigned char* aes
 
 decrypt::decrypt(const decrypt& _a) : aes::aes() {
 	this->clone(_a);
-	aesDecryptCtx = (EVP_CIPHER_CTX*)malloc(sizeof(EVP_CIPHER_CTX));
+	aesDecryptCtx = EVP_CIPHER_CTX_new();
+	//aesDecryptCtx = (EVP_CIPHER_CTX*)malloc(sizeof(EVP_CIPHER_CTX));
     if(aesDecryptCtx == NULL) {
         exit(FAILURE);
     }
@@ -77,7 +79,8 @@ int decrypt::aesDecrypt(unsigned char *encMsg, size_t encMsgLen, unsigned char *
 decrypt::~decrypt() {
 	aes::clear_all();
 	EVP_CIPHER_CTX_cleanup(aesDecryptCtx);
-	free(aesDecryptCtx);
+	EVP_CIPHER_CTX_free(aesDecryptCtx);
+	//free(aesDecryptCtx);
 }
 
-#endif
\ No newline at end of file
+#endif
diff --git a/obj/.empty b/obj/.empty
new file mode 100644
index 0000000..e69de29