#include <ntdef.h>

Include dependency graph for sha1.h:

This graph shows which files directly or indirectly include this file:

Classes
struct	SHA_CTX

Typedefs
typedef struct SHA_CTX *	PSHA_CTX

Functions
VOID NTAPI	A_SHAInit (PSHA_CTX Context)

VOID NTAPI	A_SHAUpdate (PSHA_CTX Context, const unsigned char *Buffer, ULONG BufferSize)

VOID NTAPI	A_SHAFinal (PSHA_CTX Context, PULONG Result)

Typedef Documentation

◆ PSHA_CTX

typedef struct SHA_CTX * PSHA_CTX

Function Documentation

◆ A_SHAFinal()

VOID NTAPI A_SHAFinal	(	PSHA_CTX	Context,
		PULONG	Result
	)

Definition at line 171 of file sha1.c.

{
   INT Pad, Index;
   UCHAR Buffer[72];
   ULONG *Count;
   ULONG BufferContentSize, LengthHi, LengthLo;
 
   BufferContentSize = Context->Count[1] & 63;
   if (BufferContentSize >= 56)
      Pad = 56 + 64 - BufferContentSize;
   else
      Pad = 56 - BufferContentSize;
 
   LengthHi = (Context->Count[0] << 3) | (Context->Count[1] >> (32 - 3));
   LengthLo = (Context->Count[1] << 3);
 
   memset(Buffer + 1, 0, Pad - 1);
   Buffer[0] = 0x80;
   Count = (ULONG*)(Buffer + Pad);
   Count[0] = DWORD2BE(LengthHi);
   Count[1] = DWORD2BE(LengthLo);
   A_SHAUpdate(Context, Buffer, Pad + 8);
 
   for (Index = 0; Index < 5; Index++)
      Result[Index] = DWORD2BE(Context->State[Index]);
 
   memset(Context->Buffer, 0, sizeof(Context->Buffer));
   A_SHAInit(Context);
}

◆ A_SHAInit()

VOID NTAPI A_SHAInit ( PSHA_CTX Context )

Definition at line 102 of file sha1.c.

{
   /* SHA1 initialization constants */
   Context->State[0] = 0x67452301;
   Context->State[1] = 0xEFCDAB89;
   Context->State[2] = 0x98BADCFE;
   Context->State[3] = 0x10325476;
   Context->State[4] = 0xC3D2E1F0;
   Context->Count[0] =
   Context->Count[1] = 0;
}

Referenced by A_SHAFinal().

◆ A_SHAUpdate()

VOID NTAPI A_SHAUpdate	(	PSHA_CTX	Context,
		const unsigned char *	Buffer,
		ULONG	BufferSize
	)

Definition at line 128 of file sha1.c.

{
   ULONG BufferContentSize;
 
   BufferContentSize = Context->Count[1] & 63;
   Context->Count[1] += BufferSize;
   if (Context->Count[1] < BufferSize)
      Context->Count[0]++;
   Context->Count[0] += (BufferSize >> 29);
 
   if (BufferContentSize + BufferSize < 64)
   {
      memcpy(&Context->Buffer[BufferContentSize], Buffer,
                    BufferSize);
   }
   else
   {
      while (BufferContentSize + BufferSize >= 64)
      {
         memcpy(Context->Buffer + BufferContentSize, Buffer,
                       64 - BufferContentSize);
         Buffer += 64 - BufferContentSize;
         BufferSize -= 64 - BufferContentSize;
         SHA1Transform(Context->State, Context->Buffer);
         BufferContentSize = 0;
      }
      memcpy(Context->Buffer + BufferContentSize, Buffer, BufferSize);
   }
}