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sha1.h File Reference
#include <ntdef.h>
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Classes

struct  SHA_CTX
 

Typedefs

typedef struct SHA_CTXPSHA_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.

172 {
173  INT Pad, Index;
174  UCHAR Buffer[72];
175  ULONG *Count;
176  ULONG BufferContentSize, LengthHi, LengthLo;
177 
178  BufferContentSize = Context->Count[1] & 63;
179  if (BufferContentSize >= 56)
180  Pad = 56 + 64 - BufferContentSize;
181  else
182  Pad = 56 - BufferContentSize;
183 
184  LengthHi = (Context->Count[0] << 3) | (Context->Count[1] >> (32 - 3));
185  LengthLo = (Context->Count[1] << 3);
186 
187  memset(Buffer + 1, 0, Pad - 1);
188  Buffer[0] = 0x80;
189  Count = (ULONG*)(Buffer + Pad);
190  Count[0] = DWORD2BE(LengthHi);
191  Count[1] = DWORD2BE(LengthLo);
192  A_SHAUpdate(Context, Buffer, Pad + 8);
193 
194  for (Index = 0; Index < 5; Index++)
195  Result[Index] = DWORD2BE(Context->State[Index]);
196 
198 }
_Inout_ __drv_aliasesMem PSLIST_ENTRY _Inout_ PSLIST_ENTRY _In_ ULONG Count
Definition: exfuncs.h:1223
char * Pad(char *Str, char PadChar, ULONG Length)
Definition: cabman.cxx:29
int32_t INT
Definition: typedefs.h:58
_At_(*)(_In_ PWSK_CLIENT Client, _In_opt_ PUNICODE_STRING NodeName, _In_opt_ PUNICODE_STRING ServiceName, _In_opt_ ULONG NameSpace, _In_opt_ GUID *Provider, _In_opt_ PADDRINFOEXW Hints, _Outptr_ PADDRINFOEXW *Result, _In_opt_ PEPROCESS OwningProcess, _In_opt_ PETHREAD OwningThread, _Inout_ PIRP Irp Result)(Mem)) NTSTATUS(WSKAPI *PFN_WSK_GET_ADDRESS_INFO
Definition: wsk.h:426
Definition: bufpool.h:45
VOID NTAPI A_SHAUpdate(PSHA_CTX Context, const unsigned char *Buffer, ULONG BufferSize)
Definition: sha1.c:128
static const UCHAR Index[8]
Definition: usbohci.c:18
unsigned char UCHAR
Definition: xmlstorage.h:181
VOID NTAPI A_SHAInit(PSHA_CTX Context)
Definition: sha1.c:102
#define DWORD2BE(x)
Definition: sha1.c:26
unsigned int ULONG
Definition: retypes.h:1
#define memset(x, y, z)
Definition: compat.h:39

◆ A_SHAInit()

VOID NTAPI A_SHAInit ( PSHA_CTX  Context)

Definition at line 102 of file sha1.c.

103 {
104  /* SHA1 initialization constants */
105  Context->State[0] = 0x67452301;
106  Context->State[1] = 0xEFCDAB89;
107  Context->State[2] = 0x98BADCFE;
108  Context->State[3] = 0x10325476;
109  Context->State[4] = 0xC3D2E1F0;
110  Context->Count[0] =
111  Context->Count[1] = 0;
112 }

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.

129 {
130  ULONG BufferContentSize;
131 
132  BufferContentSize = Context->Count[1] & 63;
133  Context->Count[1] += BufferSize;
134  if (Context->Count[1] < BufferSize)
135  Context->Count[0]++;
136  Context->Count[0] += (BufferSize >> 29);
137 
138  if (BufferContentSize + BufferSize < 64)
139  {
140  memcpy(&Context->Buffer[BufferContentSize], Buffer,
141  BufferSize);
142  }
143  else
144  {
145  while (BufferContentSize + BufferSize >= 64)
146  {
147  memcpy(Context->Buffer + BufferContentSize, Buffer,
148  64 - BufferContentSize);
149  Buffer += 64 - BufferContentSize;
150  BufferSize -= 64 - BufferContentSize;
151  SHA1Transform(Context->State, Context->Buffer);
152  BufferContentSize = 0;
153  }
154  memcpy(Context->Buffer + BufferContentSize, Buffer, BufferSize);
155  }
156 }
static void SHA1Transform(ULONG State[5], UCHAR Buffer[64])
Definition: sha1.c:42
Definition: bufpool.h:45
#define BufferSize
Definition: mmc.h:75
#define memcpy(s1, s2, n)
Definition: mkisofs.h:878
unsigned int ULONG
Definition: retypes.h:1

Referenced by A_SHAFinal().