# sha2_context Struct Reference

`#include <sha2.h>`

## Detailed Description

SHA-256 context structure.

Definition at line 29 of file sha2.h.

## Data Fields
unsigned char | buffer [64]
unsigned char | ipad [64]
int | is224
unsigned char | opad [64]
unsigned long | state [8]
unsigned long | total [2]

## Field Documentation

unsigned char sha2_context::buffer[64]

data block being processed

Definition at line 33 of file sha2.h.

unsigned char sha2_context::ipad[64]

HMAC: inner padding

Definition at line 35 of file sha2.h.

int sha2_context::is224

0 => SHA-256, else SHA-224

Definition at line 37 of file sha2.h.

unsigned char sha2_context::opad[64]

HMAC: outer padding

Definition at line 36 of file sha2.h.

unsigned long sha2_context::state[8]

intermediate digest state

Definition at line 32 of file sha2.h.

unsigned long sha2_context::total[2]

number of bytes processed

Definition at line 31 of file sha2.h.