Changed the SHA512 context system

CMakeLists.txt

@@ -22,6 +22,7 @@ if(USE_OPENSSL)
 	add_definitions(-DUSE_OPENSSL)
 	set(SOURCE ${SOURCE} src/sha512_openssl.c)
 else()
+	message(FATAL_ERROR "Not supported yet!")
 	set(SOURCE ${SOURCE} src/sha512.c)
 endif()
 

include/sha512.h

@@ -3,22 +3,9 @@
 
 #include <assert.h>
 
-#ifdef USE_OPENSSL
-	#include <openssl/sha.h>
-
-	typedef SHA512_CTX sha512_context;
-#else
-	#include <stddef.h>
-
-	#include "fixedint.h"
-
-	/* state */
-	typedef struct sha512_context_ {
-		uint64_t  length, state[8];
-		size_t curlen;
-		unsigned char buf[128];
-	} sha512_context;
-#endif
+typedef struct {
+	void* context;
+} sha512_context;
 
 typedef struct sha512_functions_ {
 	int(*_ed_sha512_init)(sha512_context*);

src/sha512.c

@@ -12,6 +12,13 @@
 #include "../include/fixedint.h"
 #include "../include/sha512.h"
 
+/* state */
+typedef struct sha512_context_ {
+	uint64_t  length, state[8];
+	size_t curlen;
+	unsigned char buf[128];
+} sha512_context;
+
 /* the K array */
 static const uint64_t K[80] = {
 		UINT64_C(0x428a2f98d728ae22), UINT64_C(0x7137449123ef65cd),

src/sha512_openssl.c

@@ -1,17 +1,28 @@
 #include <openssl/sha.h>
+#include <stdlib.h>
 #include "../include/sha512.h"
 
 
-int _ed_sha512_init(sha512_context * md) {
-	return SHA512_Init(md) != 1; /* Returns 0 on success */
+int _ed_sha512_init(sha512_context* md) {
+	assert(!md->context);
+
+	md->context = malloc(sizeof(SHA512_CTX));
+	return SHA512_Init(md->context) != 1; /* Returns 0 on success */
 }
 
-int _ed_sha512_final(sha512_context * md, unsigned char *out) {
-	return SHA512_Final(out, md) != 1; /* Returns 0 on success */
+int _ed_sha512_final(sha512_context* md, unsigned char *out) {
+	assert(md->context);
+
+	int result = SHA512_Final(out, md->context) != 1; /* Returns 0 on success */
+	free(md->context);
+	md->context = 0;
+	return result;
 }
 
-int _ed_sha512_update(sha512_context * md, const unsigned char *in, size_t inlen) {
-	return SHA512_Update(md, in, inlen) != 1; /* Returns 0 on success */
+int _ed_sha512_update(sha512_context* md, const unsigned char *in, size_t inlen) {
+	assert(md->context);
+
+	return SHA512_Update(md->context, in, inlen) != 1; /* Returns 0 on success */
 }
 
 sha512_functions _ed_sha512_functions = {