chore: initial commit (extracted from Launchers monorepo)

Plugin: ns7zip v2.0.0 Architectures: x86-ansi, x86-unicode, amd64-unicode License: LGPL-2.1-or-later
2026-04-29 14:07:51 +02:00
commit d074cc7c07
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+// HmacSha256.cpp
+
+#include "StdAfx.h"
+
+#include <string.h>
+
+#include "../../../C/CpuArch.h"
+
+#include "HmacSha256.h"
+
+namespace NCrypto {
+namespace NSha256 {
+
+void CHmac::SetKey(const Byte *key, size_t keySize)
+{
+  MY_ALIGN (16)
+  UInt32 temp[SHA256_NUM_BLOCK_WORDS];
+  size_t i;
+  
+  for (i = 0; i < SHA256_NUM_BLOCK_WORDS; i++)
+    temp[i] = 0;
+  
+  if (keySize > kBlockSize)
+  {
+    Sha256_Init(&_sha);
+    Sha256_Update(&_sha, key, keySize);
+    Sha256_Final(&_sha, (Byte *)temp);
+  }
+  else
+    memcpy(temp, key, keySize);
+  
+  for (i = 0; i < SHA256_NUM_BLOCK_WORDS; i++)
+    temp[i] ^= 0x36363636;
+  
+  Sha256_Init(&_sha);
+  Sha256_Update(&_sha, (const Byte *)temp, kBlockSize);
+  
+  for (i = 0; i < SHA256_NUM_BLOCK_WORDS; i++)
+    temp[i] ^= 0x36363636 ^ 0x5C5C5C5C;
+
+  Sha256_Init(&_sha2);
+  Sha256_Update(&_sha2, (const Byte *)temp, kBlockSize);
+}
+
+
+void CHmac::Final(Byte *mac)
+{
+  Sha256_Final(&_sha, mac);
+  Sha256_Update(&_sha2, mac, SHA256_DIGEST_SIZE);
+  Sha256_Final(&_sha2, mac);
+}
+
+}}