sha2.cpp File Reference

#include <string.h>
#include <stdio.h>
#include "sha2.h"
#include "filesys.h"
#include "../shared/shared.h"

Include dependency graph for sha2.cpp:

Go to the source code of this file.

Macros
#define	_CRT_SECURE_NO_DEPRECATE   1
#define	GET_UINT32_BE(n, b, i)
#define	PUT_UINT32_BE(n, b, i)
#define	SHR(x, n)
#define	ROTR(x, n)
#define	S0(x)
#define	S1(x)
#define	S2(x)
#define	S3(x)
#define	F0(x, y, z)
#define	F1(x, y, z)
#define	R(t)
#define	P(a, b, c, d, e, f, g, h, x, K)

Functions
void	Com_SHA2Starts (sha2_context *ctx)
static void	Com_SHA2Process (sha2_context *ctx, const byte data[64])
void	Com_SHA2Update (sha2_context *ctx, const byte *input, uint32_t length)
void	Com_SHA2Finish (sha2_context *ctx, byte digest[32])
bool	Com_SHA2File (const char *filename, byte digest[32])
	Output SHA-256(file contents).
void	Com_SHA2Csum (const byte *buf, uint32_t buflen, byte digest[32])
	Output SHA-256(buf).
void	Com_SHA2ToHex (const byte digest[32], char final[65])
void	Com_SHA2Hmac (const byte *buf, uint32_t buflen, const byte *key, uint32_t keylen, byte digest[32])
	Output HMAC-SHA-256(buf,key).

Variables
static const byte	sha2_padding [64]

Macro Definition Documentation

_CRT_SECURE_NO_DEPRECATE

#define _CRT_SECURE_NO_DEPRECATE   1

Definition at line 27 of file sha2.cpp.

F0

#define F0	(		x,
			y,
			z )

Value:

((x & y) | (z & (x | y)))

F1

#define F1	(		x,
			y,
			z )

Value:

(z ^ (x & (y ^ z)))

GET_UINT32_BE

#define GET_UINT32_BE	(		n,
			b,
			i )

Value:

{                                               \
    (n) = ( (uint64_t) (b)[(i)    ] << 24 )        \
        | ( (uint64_t) (b)[(i) + 1] << 16 )        \
        | ( (uint64_t) (b)[(i) + 2] <<  8 )        \
        | ( (uint64_t) (b)[(i) + 3]       );       \
}

32-bit integer manipulation macros (big endian)

Definition at line 41 of file sha2.cpp.

Referenced by Com_SHA2Process().

P

#define P	(		a,
			b,
			c,
			d,
			e,
			f,
			g,
			h,
			x,
			K )

Value:

{                                               \
    temp1 = h + S3(e) + F1(e,f,g) + K + x;      \
    temp2 = S2(a) + F0(a,b,c);                  \
    d += temp1; h = temp1 + temp2;              \
}

Referenced by Com_SHA2Process().

PUT_UINT32_BE

#define PUT_UINT32_BE	(		n,
			b,
			i )

Value:

{                                               \
    (b)[(i)    ] = (byte) ( (n) >> 24 );       \
    (b)[(i) + 1] = (byte) ( (n) >> 16 );       \
    (b)[(i) + 2] = (byte) ( (n) >>  8 );       \
    (b)[(i) + 3] = (byte) ( (n)       );       \
}

Definition at line 50 of file sha2.cpp.

Referenced by Com_SHA2Finish().

R

#define R

(

t

)

Value:

(                                               \
    W[t] = S1(W[t -  2]) + W[t -  7] +          \
           S0(W[t - 15]) + W[t - 16]            \
)

Referenced by Com_SHA2Process().

ROTR

#define ROTR	(		x,
			n )

Value:

(SHR(x,n) | (x << (32 - n)))

S0

#define S0

(

x

)

Value:

(ROTR(x, 7) ^ ROTR(x,18) ^  SHR(x, 3))

S1

#define S1

(

x

)

Value:

(ROTR(x,17) ^ ROTR(x,19) ^  SHR(x,10))

S2

#define S2

(

x

)

Value:

(ROTR(x, 2) ^ ROTR(x,13) ^ ROTR(x,22))

S3

#define S3

(

x

)

Value:

(ROTR(x, 6) ^ ROTR(x,11) ^ ROTR(x,25))

SHR

#define SHR	(		x,
			n )

Value:

((x & 0xFFFFFFFF) >> n)

Function Documentation

Com_SHA2Csum()

void Com_SHA2Csum	(	const byte *	buf,
		uint32_t	buflen,
		byte	digest[32] )

Output SHA-256(buf).

Definition at line 292 of file sha2.cpp.

References Com_SHA2Finish(), Com_SHA2Starts(), and Com_SHA2Update().

Referenced by TEST_F().

Com_SHA2File()

bool Com_SHA2File	(	const char *	filename,
		byte	digest[32] )

Output SHA-256(file contents).

Returns

true if successful

Definition at line 270 of file sha2.cpp.

References Com_SHA2Finish(), Com_SHA2Starts(), Com_SHA2Update(), f, FILE_READ, FS_OpenFile(), and FS_Read().

Com_SHA2Finish()

void Com_SHA2Finish	(	sha2_context *	ctx,
		byte	digest[32] )

Definition at line 244 of file sha2.cpp.

References Com_SHA2Update(), PUT_UINT32_BE, sha2_padding, sha2_context::state, and sha2_context::total.

Referenced by Com_SHA2Csum(), Com_SHA2File(), and Com_SHA2Hmac().

Com_SHA2Hmac()

void Com_SHA2Hmac	(	const byte *	buf,
		uint32_t	buflen,
		const byte *	key,
		uint32_t	keylen,
		byte	digest[32] )

Output HMAC-SHA-256(buf,key).

Definition at line 308 of file sha2.cpp.

References Com_SHA2Finish(), Com_SHA2Starts(), Com_SHA2Update(), i, and key.

Com_SHA2Process()

void Com_SHA2Process ( sha2_context * ctx, const byte data[64] )

static

Definition at line 77 of file sha2.cpp.

References data, E, F, G, GET_UINT32_BE, H, P, R, and sha2_context::state.

Referenced by Com_SHA2Update().

Com_SHA2Starts()

void Com_SHA2Starts

(

sha2_context *

ctx

)

Core SHA-256 functions

Definition at line 62 of file sha2.cpp.

References sha2_context::state, and sha2_context::total.

Referenced by Com_SHA2Csum(), Com_SHA2File(), and Com_SHA2Hmac().

Com_SHA2ToHex()

void Com_SHA2ToHex	(	const byte	digest[32],
		char	final[65] )

Definition at line 301 of file sha2.cpp.

References i, and Q_strcat().

Referenced by TEST_F().

Com_SHA2Update()

void Com_SHA2Update	(	sha2_context *	ctx,
		const byte *	input,
		uint32_t	length )

Definition at line 207 of file sha2.cpp.

References sha2_context::buffer, Com_SHA2Process(), length, and sha2_context::total.

Referenced by Com_SHA2Csum(), Com_SHA2File(), Com_SHA2Finish(), and Com_SHA2Hmac().

Variable Documentation

sha2_padding

const byte sha2_padding[64]

static

Initial value:

                       =
{ 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }

Definition at line 240 of file sha2.cpp.

Referenced by Com_SHA2Finish().