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# beecrypt/sha256.c File Reference

SHA-256 hash function, code. More...

`#include "system.h"`
`#include "sha256.h"`
`#include "mp32.h"`
`#include "endianness.h"`
`#include "debug.h"`

Go to the source code of this file.

## Defines

#define | R(x, s) ((x) >> (s))
#define | S(x, s) ROTR32(x, s)
#define | CH(x, y, z) ((x&(y^z))^z)
#define | MAJ(x, y, z) (((x|y)&z)|(x&y))
#define | SIG0(x) (S(x,2) ^ S(x,13) ^ S(x,22))
#define | SIG1(x) (S(x,6) ^ S(x,11) ^ S(x,25))
#define | sig0(x) (S(x,7) ^ S(x,18) ^ R(x,3))
#define | sig1(x) (S(x,17) ^ S(x,19) ^ R(x,10))
#define | ROUND(a, b, c, d, e, f, g, h, w, k)

## Functions

int | sha256Reset (register sha256Param *p)
void | sha256Process (register sha256Param *p)
int | sha256Update (register sha256Param *p, const byte *data, int size)
void | sha256Finish (register sha256Param *p)
int | sha256Digest (register sha256Param *p, uint32 *data)

## Variables

const uint32 | k [64]
const uint32 | hinit [8]
const hashFunction | sha256 = { "SHA-256", sizeof(sha256Param), 64, 8 * sizeof(uint32), (hashFunctionReset) sha256Reset, (hashFunctionUpdate) sha256Update, (hashFunctionDigest) sha256Digest }

## Detailed Description

SHA-256 hash function, code.

Definition in file sha256.c.

## Define Documentation

#define CH | ( | x,
|  | y,
|  | z |  | ) | ((x&(y^z))^z)

| Definition at line 73 of file sha256.c.

#define MAJ | ( | x,
|  | y,
|  | z |  | ) | (((x|y)&z)|(x&y))

| Definition at line 74 of file sha256.c.

#define R | ( | x,
|  | s |  | ) | ((x) >> (s))

| Definition at line 70 of file sha256.c.

#define ROUND | ( | a,
|  | b,
|  | c,
|  | d,
|  | e,
|  | f,
|  | g,
|  | h,
|  | w,
|  | k |  | ) |

Value:

    temp = h + SIG1(e) + CH(e,f,g) + k + w; \
            h = temp + SIG0(a) + MAJ(a,b,c);        \
            d += temp

Definition at line 80 of file sha256.c.

Referenced by sha256Process.

#define S | ( | x,
|  | s |  | ) | ROTR32(x, s)

| Definition at line 71 of file sha256.c.

#define sig0 | ( | x |  | ) | (S(x,7) ^ S(x,18) ^ R(x,3))

| Definition at line 77 of file sha256.c. Referenced by sha256Process.

#define SIG0 | ( | x |  | ) | (S(x,2) ^ S(x,13) ^ S(x,22))

| Definition at line 75 of file sha256.c.

#define sig1 | ( | x |  | ) | (S(x,17) ^ S(x,19) ^ R(x,10))

| Definition at line 78 of file sha256.c. Referenced by sha256Process.

#define SIG1 | ( | x |  | ) | (S(x,6) ^ S(x,11) ^ S(x,25))

| Definition at line 76 of file sha256.c.

## Function Documentation

int sha256Digest | ( | register sha256Param * | p,
|  | uint32 * | data
| ) |

| Definition at line 256 of file sha256.c. References mp32copy, sha256Finish, sha256Reset, and uint32.

void sha256Finish | ( | register sha256Param * | p | ) | `[static]`

| Definition at line 221 of file sha256.c. References sha256Process, swapu32, and uint32. Referenced by sha256Digest.

void sha256Process | ( | register sha256Param * | p | ) |

| Definition at line 87 of file sha256.c. References k, ROUND, sig0, sig1, swapu32, and uint32.

int sha256Reset | ( | register sha256Param * | p | ) |

| Definition at line 60 of file sha256.c. References hinit, mp32copy, and mp32zero.

int sha256Update | ( | register sha256Param * | p,
|  | const byte * | data,
|  | int | size
| ) |

| Definition at line 195 of file sha256.c. References sha256Process.

## Variable Documentation

const uint32 hinit[8]`[static]`

Initial value:

     {
            0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19
    }

Definition at line 51 of file sha256.c.

Referenced by sha256Reset.

const uint32 k[64]`[static]`

Initial value:

     {
            0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
            0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
            0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
            0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
            0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
            0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
            0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
            0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
    }

Definition at line 37 of file sha256.c.

Referenced by sha256Process.