Add implementation for siphash

2026-08-31 02:15:01 +01:00
parent bca2e720ad
commit 900c16415b
13 changed files with 848 additions and 2 deletions
@@ -0,0 +1,103 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
+/**
+ * Implementations of the SipHash-2-4-128, SipHash4-8-128, SipHash-2-4-64 and SipHash4-8-64
+ * algorithms based on https://github.com/veorq/SipHash/blob/master/siphash.c
+ */
+
+#ifndef SIPHASH_H
+#define SIPHASH_H
+
+#include "../../stream/stream.h"
+#include "../../../common/aliases/aliases.h"
+#include "../../../common/platform/platform.h"
+
+#ifdef WP_PLATFORM_CPP
+BEGIN_C_LINKAGE
+#endif // !WP_PLATFORM_CPP
+
+#define WP_SIP_HASHER_128_MAGIC ((u64)0x5750534950313238)
+#define WP_SIP_HASHER_64_MAGIC ((u64)0x57505349503634)
+
+typedef struct {
+	u64 lo;
+	u64 hi;
+} WpSipHasherKey;
+
+typedef struct {
+	WpSipHasherKey key;
+	u64 magic;
+	u64 compression;
+	u64 finalisation;
+} WpSipHasherParams;
+
+typedef struct {
+	WpSipHasherParams params;
+	u64 hash[2];
+} WpSipHasher128IO;
+
+typedef struct {
+	WpSipHasherParams params;
+	u64 hash;
+} WpSipHasher64IO;
+
+#ifdef WP_PLATFORM_CPP
+#define wpSip24Hasher128IO(KEY) (WpSipHasher128IO{                                                 \
+	WpSipHasherParams{KEY, WP_SIP_HASHER_128_MAGIC, 2, 4},                                           \
+	{},                                                                                              \
+})
+#define wpSip48Hasher128IO(KEY) (WpSipHasher128IO{                                                 \
+	WpSipHasherParams{KEY, WP_SIP_HASHER_128_MAGIC, 4, 8},                                           \
+	{},                                                                                              \
+})
+#define wpSip24Hasher64IO(KEY) (WpSipHasher64IO{                                                   \
+	WpSipHasherParams{KEY, WP_SIP_HASHER_64_MAGIC, 2, 4},                                            \
+	0,                                                                                               \
+})
+#define wpSip48Hasher64IO(KEY) (WpSipHasher64IO{                                                   \
+	WpSipHasherParams{KEY, WP_SIP_HASHER_64_MAGIC, 4, 8},                                            \
+	0,                                                                                               \
+})
+#else
+#define wpSip24Hasher128IO(KEY) ((WpSipHasher128IO){                                               \
+	.params = (WpSipHasherParams){                                                                   \
+		.key          = KEY,                                                                           \
+		.magic        = WP_SIP_HASHER_128_MAGIC,                                                       \
+		.compression  = 2,                                                                             \
+		.finalisation = 4,                                                                             \
+	}                                                                                                \
+})
+#define wpSip48Hasher128IO(KEY) ((WpSipHasher128IO){                                               \
+	.params = (WpSipHasherParams){                                                                   \
+		.key          = KEY,                                                                           \
+		.magic        = WP_SIP_HASHER_128_MAGIC,                                                       \
+		.compression  = 4,                                                                             \
+		.finalisation = 8,                                                                             \
+	}                                                                                                \
+})
+#define wpSip24Hasher64IO(KEY) ((WpSipHasher64IO){                                                 \
+	.params = (WpSipHasherParams){                                                                   \
+		.key          = KEY,                                                                           \
+		.magic        = WP_SIP_HASHER_64_MAGIC,                                                        \
+		.compression  = 2,                                                                             \
+		.finalisation = 4,                                                                             \
+	}                                                                                                \
+})
+#define wpSip48Hasher64IO(KEY) ((WpSipHasher64IO){                                                 \
+	.params = (WpSipHasherParams){                                                                   \
+		.key          = KEY,                                                                           \
+		.magic        = WP_SIP_HASHER_64_MAGIC,                                                        \
+		.compression  = 4,                                                                             \
+		.finalisation = 8,                                                                             \
+	}                                                                                                \
+})
+#endif
+
+void wpSipHasher128(WpU8Stream *bytes, void *hasher_io);
+void wpSipHasher64(WpU8Stream *bytes, void *hasher_io);
+
+#ifdef WP_PLATFORM_CPP
+END_C_LINKAGE
+#endif // !WP_PLATFORM_CPP
+
+#endif // !SIPHASH_H