From e5431fa6f5505e385c6f9367260717e9c47dc2ee Mon Sep 17 00:00:00 2001
From: Igor Pavlov <87184205+ip7z@users.noreply.github.com>
Date: Fri, 29 Nov 2024 00:00:00 +0000
Subject: 24.09

---
 C/Sha3.h | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 C/Sha3.h

(limited to 'C/Sha3.h')

diff --git a/C/Sha3.h b/C/Sha3.h
new file mode 100644
index 0000000..c5909c9
--- /dev/null
+++ b/C/Sha3.h
@@ -0,0 +1,36 @@
+/* Sha3.h -- SHA-3 Hash
+: Igor Pavlov : Public domain */
+
+#ifndef ZIP7_INC_MD5_H
+#define ZIP7_INC_MD5_H
+
+#include "7zTypes.h"
+
+EXTERN_C_BEGIN
+
+#define SHA3_NUM_STATE_WORDS  25
+
+#define SHA3_BLOCK_SIZE_FROM_DIGEST_SIZE(digestSize) \
+    (SHA3_NUM_STATE_WORDS * 8 - (digestSize) * 2)
+
+typedef struct
+{
+  UInt32 count;     // < blockSize
+  UInt32 blockSize; // <= SHA3_NUM_STATE_WORDS * 8
+  UInt64 _pad1[3];
+  // we want 32-bytes alignment here
+  UInt64 state[SHA3_NUM_STATE_WORDS];
+  UInt64 _pad2[3];
+  // we want 64-bytes alignment here
+  Byte buffer[SHA3_NUM_STATE_WORDS * 8]; // last bytes will be unused with predefined blockSize values
+} CSha3;
+
+#define Sha3_SET_blockSize(p, blockSize) { (p)->blockSize = (blockSize); }
+
+void Sha3_Init(CSha3 *p);
+void Sha3_Update(CSha3 *p, const Byte *data, size_t size);
+void Sha3_Final(CSha3 *p, Byte *digest, unsigned digestSize, unsigned shake);
+
+EXTERN_C_END
+
+#endif
-- 
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