chacha.c File Reference

#include "wizard/studio.h"
#include "wizard/chacha.h"
#include "wizard/exception.h"
#include "wizard/exception-private.h"
#include "wizard/memory_.h"

Include dependency graph for chacha.c:

Go to the source code of this file.

Data Structures
struct	_ChachaInfo

Macros
#define	ChachaBlocksize   64
#define	PushChachaWord(p)
#define	ChachaAdd(v, w)   ((unsigned int) ((v)+(w)) & 0xFFFFFFFFU)
#define	ChachaQuarterRound(a, b, c, d)
#define	ChachaRotate(v, n)    (((unsigned int) ((v) << (n)) & 0xFFFFFFFFU) | ((v) >> (32-(n))))
#define	PopChachaWord(p, v)

Functions
WizardExport ChachaInfo *	AcquireChachaInfo (void)
WizardExport void	DecipherChachaBlock (ChachaInfo *chacha_info, const unsigned char *ciphertext, unsigned char *plaintext)
WizardExport ChachaInfo *	DestroyChachaInfo (ChachaInfo *chacha_info)
WizardExport void	EncipherChachaBlock (ChachaInfo *chacha_info, const unsigned char *plaintext, unsigned char *ciphertext)
WizardExport unsigned int	GetChachaBlocksize (const ChachaInfo *chacha_info)
WizardExport void	SetChachaKey (ChachaInfo *chacha_info, const StringInfo *key)
WizardExport void	SetChachaNonce (ChachaInfo *chacha_info, const unsigned char *nonce, const unsigned char *counter)

Macro Definition Documentation

ChachaAdd

#define ChachaAdd	(		v,
			w
	)		((unsigned int) ((v)+(w)) & 0xFFFFFFFFU)

ChachaBlocksize

#define ChachaBlocksize   64

Definition at line 70 of file chacha.c.

ChachaQuarterRound

#define ChachaQuarterRound	(		a,
			b,
			c,
			d
	)

Value:

{ \
  a=ChachaAdd(a,b); d=ChachaRotate((d) ^ (a),16); \
  c=ChachaAdd(c,d); b=ChachaRotate((b) ^ (c),12); \
  a=ChachaAdd(a,b); d=ChachaRotate((d) ^ (a), 8); \
  c=ChachaAdd(c,d); b=ChachaRotate((b) ^ (c), 7); \
}

ChachaRotate

#define ChachaRotate	(		v,
			n
	)		(((unsigned int) ((v) << (n)) & 0xFFFFFFFFU) | ((v) >> (32-(n))))

PopChachaWord

#define PopChachaWord	(		p,
			v
	)

Value:

{ \
  (p)[0]=((unsigned char) (((v) >>  0) & 0xff)); \
  (p)[1]=((unsigned char) (((v) >>  8) & 0xff)); \
  (p)[2]=((unsigned char) (((v) >> 16) & 0xff)); \
  (p)[3]=((unsigned char) (((v) >> 24) & 0xff)); \
}

PushChachaWord

#define PushChachaWord

(

p

)

Value:

  (((unsigned int) ((p)[0]) <<  0) | \
   ((unsigned int) ((p)[1]) <<  8) | \
   ((unsigned int) ((p)[2]) << 16) | \
   ((unsigned int) ((p)[3]) << 24))

Definition at line 71 of file chacha.c.

Function Documentation

AcquireChachaInfo()

WizardExport ChachaInfo * AcquireChachaInfo

(

void

)

Definition at line 95 of file chacha.c.

References AcquireWizardMemory(), _ChachaInfo::blocksize, ChachaBlocksize, CipherDomain, MemoryError, _ChachaInfo::signature, ThrowWizardFatalError, _ChachaInfo::timestamp, and WizardSignature.

Referenced by AcquireCipherInfo().

DecipherChachaBlock()

WizardExport void DecipherChachaBlock	(	ChachaInfo *	chacha_info,
		const unsigned char *	ciphertext,
		unsigned char *	plaintext
	)

Definition at line 138 of file chacha.c.

References EncipherChachaBlock().

Referenced by AcquireCipherInfo().

DestroyChachaInfo()

WizardExport ChachaInfo * DestroyChachaInfo

(

ChachaInfo *

chacha_info

)

Definition at line 166 of file chacha.c.

References CipherDomain, GetWizardModule, LogWizardEvent(), RelinquishWizardMemory(), _ChachaInfo::signature, TraceEvent, WizardAssert, and WizardSignature.

Referenced by DestroyCipherInfo().

EncipherChachaBlock()

WizardExport void EncipherChachaBlock	(	ChachaInfo *	chacha_info,
		const unsigned char *	plaintext,
		unsigned char *	ciphertext
	)

Definition at line 203 of file chacha.c.

References ChachaAdd, ChachaQuarterRound, _ChachaInfo::key, PopChachaWord, and PushChachaWord.

Referenced by AcquireCipherInfo(), and DecipherChachaBlock().

GetChachaBlocksize()

WizardExport unsigned int GetChachaBlocksize

(

const ChachaInfo *

chacha_info

)

Definition at line 352 of file chacha.c.

References _ChachaInfo::blocksize, CipherDomain, GetWizardModule, LogWizardEvent(), _ChachaInfo::signature, TraceEvent, WizardAssert, and WizardSignature.

Referenced by AcquireCipherInfo().

SetChachaKey()

WizardExport void SetChachaKey	(	ChachaInfo *	chacha_info,
		const StringInfo *	key
	)

Definition at line 386 of file chacha.c.

References CipherDomain, GetStringInfoDatum(), GetStringInfoLength(), GetWizardModule, _ChachaInfo::key, LogWizardEvent(), PushChachaWord, _ChachaInfo::signature, TraceEvent, WizardAssert, and WizardSignature.

Referenced by SetCipherKey().

SetChachaNonce()

WizardExport void SetChachaNonce	(	ChachaInfo *	chacha_info,
		const unsigned char *	nonce,
		const unsigned char *	counter
	)

Definition at line 468 of file chacha.c.

References _ChachaInfo::key, and PushChachaWord.