24.09HEAD24.09main

1 files changed, 86 insertions, 0 deletions

diff --git a/C/Sha512.h b/C/Sha512.h
new file mode 100644
index 0000000..1f3a4d1
--- /dev/null
+++ b/C/Sha512.h
@@ -0,0 +1,86 @@
+/* Sha512.h -- SHA-512 Hash
+: Igor Pavlov : Public domain */
+
+#ifndef ZIP7_INC_SHA512_H
+#define ZIP7_INC_SHA512_H
+
+#include "7zTypes.h"
+
+EXTERN_C_BEGIN
+
+#define SHA512_NUM_BLOCK_WORDS  16
+#define SHA512_NUM_DIGEST_WORDS  8
+
+#define SHA512_BLOCK_SIZE   (SHA512_NUM_BLOCK_WORDS * 8)
+#define SHA512_DIGEST_SIZE  (SHA512_NUM_DIGEST_WORDS * 8)
+#define SHA512_224_DIGEST_SIZE  (224 / 8)
+#define SHA512_256_DIGEST_SIZE  (256 / 8)
+#define SHA512_384_DIGEST_SIZE  (384 / 8)
+
+typedef void (Z7_FASTCALL *SHA512_FUNC_UPDATE_BLOCKS)(UInt64 state[8], const Byte *data, size_t numBlocks);
+
+/*
+  if (the system supports different SHA512 code implementations)
+  {
+    (CSha512::func_UpdateBlocks) will be used
+    (CSha512::func_UpdateBlocks) can be set by
+       Sha512_Init()        - to default (fastest)
+       Sha512_SetFunction() - to any algo
+  }
+  else
+  {
+    (CSha512::func_UpdateBlocks) is ignored.
+  }
+*/
+
+typedef struct
+{
+  union
+  {
+    struct
+    {
+      SHA512_FUNC_UPDATE_BLOCKS func_UpdateBlocks;
+      UInt64 count;
+    } vars;
+    UInt64 _pad_64bit[8];
+    void *_pad_align_ptr[2];
+  } v;
+  UInt64 state[SHA512_NUM_DIGEST_WORDS];
+  
+  Byte buffer[SHA512_BLOCK_SIZE];
+} CSha512;
+
+
+#define SHA512_ALGO_DEFAULT 0
+#define SHA512_ALGO_SW      1
+#define SHA512_ALGO_HW      2
+
+/*
+Sha512_SetFunction()
+return:
+  0 - (algo) value is not supported, and func_UpdateBlocks was not changed
+  1 - func_UpdateBlocks was set according (algo) value.
+*/
+
+BoolInt Sha512_SetFunction(CSha512 *p, unsigned algo);
+// we support only these (digestSize) values: 224/8, 256/8, 384/8, 512/8
+void Sha512_InitState(CSha512 *p, unsigned digestSize);
+void Sha512_Init(CSha512 *p, unsigned digestSize);
+void Sha512_Update(CSha512 *p, const Byte *data, size_t size);
+void Sha512_Final(CSha512 *p, Byte *digest, unsigned digestSize);
+
+
+
+
+// void Z7_FASTCALL Sha512_UpdateBlocks(UInt64 state[8], const Byte *data, size_t numBlocks);
+
+/*
+call Sha512Prepare() once at program start.
+It prepares all supported implementations, and detects the fastest implementation.
+*/
+
+void Sha512Prepare(void);
+
+EXTERN_C_END
+
+#endif