From 35c32a9c323046f2e8d2c0380c3e512ee5a88dd4 Mon Sep 17 00:00:00 2001
From: lohhiiccc <96543753+lohhiiccc@users.noreply.github.com>
Date: Thu, 30 Apr 2026 11:01:46 +0200
Subject: [PATCH] feat(libft_ssl): X-macro digest algo registry

---
 Makefile.am            |  4 +++-
 include/digest_algos.h |  2 ++
 include/libft_ssl.h    | 16 +++++++++++++---
 include/md5.h          | 13 +++++++++++++
 include/sha256.h       | 13 +++++++++++++
 src/libft_ssl.c        | 37 ++++++++++++++++++++-----------------
 6 files changed, 64 insertions(+), 21 deletions(-)
 create mode 100644 include/digest_algos.h
 create mode 100644 include/md5.h
 create mode 100644 include/sha256.h

diff --git a/Makefile.am b/Makefile.am
index 755af49..2ad04de 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -5,7 +5,9 @@ SUBDIRS				= src
 pkgincludedir		= $(includedir)/$(PACKAGE_NAME)
 pkginclude_HEADERS	= \
 					  include/libft_ssl.h \
-					  include/compiler.h
+					  include/compiler.h \
+					  include/md5.h \
+					  include/sha256.h
 
 pkgconfigdir		= $(libdir)/pkgconfig
 pkgconfig_DATA		= libft_ssl.pc
diff --git a/include/digest_algos.h b/include/digest_algos.h
new file mode 100644
index 0000000..effc4eb
--- /dev/null
+++ b/include/digest_algos.h
@@ -0,0 +1,2 @@
+DIGEST_ALGO(md5,    16, 64)
+DIGEST_ALGO(sha256, 32, 64)
diff --git a/include/libft_ssl.h b/include/libft_ssl.h
index 82b9a4c..63733fd 100644
--- a/include/libft_ssl.h
+++ b/include/libft_ssl.h
@@ -4,18 +4,28 @@
 #include <stddef.h>
 #include <stdint.h>
 
+#include "md5.h"
+#include "sha256.h"
+
 struct digest_algo
 {
 	const char	*name;
 	size_t		digest_size;
 	size_t		block_size;
-	size_t		ctx_size;
 	void		(*init)  (void *ctx);
 	void		(*update)(void *ctx, const uint8_t *data, size_t len);
 	void		(*final) (void *ctx, uint8_t *out);
 };
 
-extern const struct digest_algo	g_md5;
-extern const struct digest_algo	g_sha256;
+union digest_ctx
+{
+#define DIGEST_ALGO(lower, ds, bs)	struct lower##_ctx	lower;
+#include "digest_algos.h"
+#undef DIGEST_ALGO
+};
+
+#define DIGEST_ALGO(lower, ds, bs)	extern const struct digest_algo	g_##lower;
+#include "digest_algos.h"
+#undef DIGEST_ALGO
 
 #endif
diff --git a/include/md5.h b/include/md5.h
new file mode 100644
index 0000000..507fcff
--- /dev/null
+++ b/include/md5.h
@@ -0,0 +1,13 @@
+#ifndef MD5_H
+#define MD5_H
+
+#include <stdint.h>
+
+struct md5_ctx
+{
+	uint32_t	state[4];
+	uint64_t	count;
+	uint8_t		buf[64];
+};
+
+#endif
diff --git a/include/sha256.h b/include/sha256.h
new file mode 100644
index 0000000..995de15
--- /dev/null
+++ b/include/sha256.h
@@ -0,0 +1,13 @@
+#ifndef SHA256_H
+#define SHA256_H
+
+#include <stdint.h>
+
+struct sha256_ctx
+{
+	uint32_t	state[8];
+	uint64_t	count;
+	uint8_t		buf[64];
+};
+
+#endif
diff --git a/src/libft_ssl.c b/src/libft_ssl.c
index 3ce4a89..5eedc96 100644
--- a/src/libft_ssl.c
+++ b/src/libft_ssl.c
@@ -1,21 +1,24 @@
+#include "compiler.h"
 #include "libft_ssl.h"
 
-const struct digest_algo	g_md5 = {
-	.name			= "md5",
-	.digest_size	= 16,
-	.block_size		= 64,
-	.ctx_size		= 0,
-	.init			= NULL,
-	.update			= NULL,
-	.final			= NULL,
-};
+#define DIGEST_ALGO(lower, ds, bs)				\
+static void	lower##_init(__unused void *ctx) {}	\
+static void	lower##_update(__unused void *ctx,	\
+		__unused const uint8_t *data,			\
+		__unused size_t len) {}					\
+static void	lower##_final(__unused void *ctx,	\
+		__unused uint8_t *out) {}
+#include "digest_algos.h"
+#undef DIGEST_ALGO
 
-const struct digest_algo	g_sha256 = {
-	.name			= "sha256",
-	.digest_size	= 32,
-	.block_size		= 64,
-	.ctx_size		= 0,
-	.init			= NULL,
-	.update			= NULL,
-	.final			= NULL,
+#define DIGEST_ALGO(lower, ds, bs)				\
+const struct digest_algo	g_##lower = {		\
+	.name			= #lower,					\
+	.digest_size	= (ds),						\
+	.block_size		= (bs),						\
+	.init			= lower##_init,				\
+	.update			= lower##_update,			\
+	.final			= lower##_final,			\
 };
+#include "digest_algos.h"
+#undef DIGEST_ALGO