#include "ctaes.h"

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Macros
#define	BIT_RANGE(from, to) (((1 << ((to) - (from))) - 1) << (from))

#define	BIT_RANGE_LEFT(x, from, to, shift) (((x)&BIT_RANGE((from), (to))) << (shift))

#define	BIT_RANGE_RIGHT(x, from, to, shift) (((x)&BIT_RANGE((from), (to))) >> (shift))

#define	ROT(x, b) (((x) >> ((b)4)) \| ((x) << ((4 - (b)) 4)))

Functions
static void	LoadByte (AES_state *s, uint8_t byte, int r, int c)
	Convert a byte to sliced form, storing it corresponding to given row and column in s. More...

static void	LoadBytes (AES_state s, const uint8_t data16)
	Load 16 bytes of data into 8 sliced integers. More...

static void	SaveBytes (uint8_t data16, const AES_state s)
	Convert 8 sliced integers into 16 bytes of data. More...

static void	SubBytes (AES_state *s, int inv)

static void	ShiftRows (AES_state *s)

static void	InvShiftRows (AES_state *s)

static void	MixColumns (AES_state *s, int inv)

static void	AddRoundKey (AES_state s, const AES_state round)

static void	GetOneColumn (AES_state s, const AES_state a, int c)
	column_0(s) = column_c(a) More...

static void	KeySetupColumnMix (AES_state s, AES_state r, const AES_state *a, int c1, int c2)
	column_c1(r) \|= (column_0(s) ^= column_c2(a)) More...

static void	KeySetupTransform (AES_state s, const AES_state r)
	Rotate the rows in s one position upwards, and xor in r. More...

static void	MultX (AES_state *s)

static void	AES_setup (AES_state rounds, const uint8_t key, int nkeywords, int nrounds)
	Expand the cipher key into the key schedule. More...

static void	AES_encrypt (const AES_state rounds, int nrounds, uint8_t cipher16, const uint8_t *plain16)

static void	AES_decrypt (const AES_state rounds, int nrounds, uint8_t plain16, const uint8_t *cipher16)

void	AES128_init (AES128_ctx ctx, const uint8_t key16)

void	AES128_encrypt (const AES128_ctx ctx, size_t blocks, uint8_t cipher16, const uint8_t *plain16)

void	AES128_decrypt (const AES128_ctx ctx, size_t blocks, uint8_t plain16, const uint8_t *cipher16)

void	AES192_init (AES192_ctx ctx, const uint8_t key24)

void	AES192_encrypt (const AES192_ctx ctx, size_t blocks, uint8_t cipher16, const uint8_t *plain16)

void	AES192_decrypt (const AES192_ctx ctx, size_t blocks, uint8_t plain16, const uint8_t *cipher16)

void	AES256_init (AES256_ctx ctx, const uint8_t key32)

void	AES256_encrypt (const AES256_ctx ctx, size_t blocks, uint8_t cipher16, const uint8_t *plain16)

void	AES256_decrypt (const AES256_ctx ctx, size_t blocks, uint8_t plain16, const uint8_t *cipher16)

Macro Definition Documentation

◆ BIT_RANGE

#define BIT_RANGE	(	from,
		to
	)	(((1 << ((to) - (from))) - 1) << (from))

Definition at line 267 of file ctaes.c.

◆ BIT_RANGE_LEFT

#define BIT_RANGE_LEFT	(	x,
		from,
		to,
		shift
	)	(((x)&BIT_RANGE((from), (to))) << (shift))

Definition at line 269 of file ctaes.c.

◆ BIT_RANGE_RIGHT

#define BIT_RANGE_RIGHT	(	x,
		from,
		to,
		shift
	)	(((x)&BIT_RANGE((from), (to))) >> (shift))

Definition at line 271 of file ctaes.c.

◆ ROT

#define ROT	(	x,
		b
	)	(((x) >> ((b)4)) \| ((x) << ((4 - (b)) 4)))

Definition at line 298 of file ctaes.c.

Function Documentation

◆ AddRoundKey()

static void AddRoundKey	(	AES_state *	s,
		const AES_state *	round
	)

static

Definition at line 367 of file ctaes.c.

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◆ AES128_decrypt()

void AES128_decrypt	(	const AES128_ctx *	ctx,
		size_t	blocks,
		uint8_t *	plain16,
		const uint8_t *	cipher16
	)

Definition at line 531 of file ctaes.c.

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◆ AES128_encrypt()

void AES128_encrypt	(	const AES128_ctx *	ctx,
		size_t	blocks,
		uint8_t *	cipher16,
		const uint8_t *	plain16
	)

Definition at line 522 of file ctaes.c.

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◆ AES128_init()

void AES128_init	(	AES128_ctx *	ctx,
		const uint8_t *	key16
	)

Definition at line 518 of file ctaes.c.

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◆ AES192_decrypt()

void AES192_decrypt	(	const AES192_ctx *	ctx,
		size_t	blocks,
		uint8_t *	plain16,
		const uint8_t *	cipher16
	)

Definition at line 553 of file ctaes.c.

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◆ AES192_encrypt()

void AES192_encrypt	(	const AES192_ctx *	ctx,
		size_t	blocks,
		uint8_t *	cipher16,
		const uint8_t *	plain16
	)

Definition at line 544 of file ctaes.c.

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◆ AES192_init()

void AES192_init	(	AES192_ctx *	ctx,
		const uint8_t *	key24
	)

Definition at line 540 of file ctaes.c.

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◆ AES256_decrypt()

void AES256_decrypt	(	const AES256_ctx *	ctx,
		size_t	blocks,
		uint8_t *	plain16,
		const uint8_t *	cipher16
	)

Definition at line 575 of file ctaes.c.

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◆ AES256_encrypt()

void AES256_encrypt	(	const AES256_ctx *	ctx,
		size_t	blocks,
		uint8_t *	cipher16,
		const uint8_t *	plain16
	)

Definition at line 566 of file ctaes.c.

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◆ AES256_init()

void AES256_init	(	AES256_ctx *	ctx,
		const uint8_t *	key32
	)

Definition at line 562 of file ctaes.c.

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◆ AES_decrypt()

static void AES_decrypt	(	const AES_state *	rounds,
		int	nrounds,
		uint8_t *	plain16,
		const uint8_t *	cipher16
	)

static

Definition at line 490 of file ctaes.c.

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◆ AES_encrypt()

static void AES_encrypt	(	const AES_state *	rounds,
		int	nrounds,
		uint8_t *	cipher16,
		const uint8_t *	plain16
	)

static

Definition at line 468 of file ctaes.c.

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◆ AES_setup()

static void AES_setup	(	AES_state *	rounds,
		const uint8_t *	key,
		int	nkeywords,
		int	nrounds
	)

static

Expand the cipher key into the key schedule.

state must be a pointer to an array of size nrounds + 1. key must be a pointer to 4 * nkeywords bytes.

AES128 uses nkeywords = 4, nrounds = 10 AES192 uses nkeywords = 6, nrounds = 12 AES256 uses nkeywords = 8, nrounds = 14

Definition at line 423 of file ctaes.c.

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◆ GetOneColumn()

static void GetOneColumn	(	AES_state *	s,
		const AES_state *	a,
		int	c
	)

static

column_0(s) = column_c(a)

Definition at line 375 of file ctaes.c.

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◆ InvShiftRows()

static void InvShiftRows ( AES_state * s )

static

Definition at line 286 of file ctaes.c.

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◆ KeySetupColumnMix()

static void KeySetupColumnMix	(	AES_state *	s,
		AES_state *	r,
		const AES_state *	a,
		int	c1,
		int	c2
	)

static

column_c1(r) |= (column_0(s) ^= column_c2(a))

Definition at line 383 of file ctaes.c.

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◆ KeySetupTransform()

static void KeySetupTransform	(	AES_state *	s,
		const AES_state *	r
	)

static

Rotate the rows in s one position upwards, and xor in r.

Definition at line 393 of file ctaes.c.

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◆ LoadByte()

static void LoadByte	(	AES_state *	s,
		uint8_t	byte,
		int	r,
		int	c
	)

static

Convert a byte to sliced form, storing it corresponding to given row and column in s.

Definition at line 29 of file ctaes.c.

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◆ LoadBytes()

static void LoadBytes	(	AES_state *	s,
		const uint8_t *	data16
	)

static

Load 16 bytes of data into 8 sliced integers.

Definition at line 38 of file ctaes.c.

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◆ MixColumns()

static void MixColumns	(	AES_state *	s,
		int	inv
	)

static

Definition at line 300 of file ctaes.c.

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◆ MultX()

static void MultX ( AES_state * s )

static

Definition at line 402 of file ctaes.c.

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◆ SaveBytes()

static void SaveBytes	(	uint8_t *	data16,
		const AES_state *	s
	)

static

Convert 8 sliced integers into 16 bytes of data.

Definition at line 49 of file ctaes.c.

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◆ ShiftRows()

static void ShiftRows ( AES_state * s )

static

Definition at line 274 of file ctaes.c.

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◆ SubBytes()

static void SubBytes	(	AES_state *	s,
		int	inv
	)

static

Definition at line 68 of file ctaes.c.

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Macros

Functions

Macro Definition Documentation

◆ BIT_RANGE

◆ BIT_RANGE_LEFT

◆ BIT_RANGE_RIGHT

◆ ROT

Function Documentation

◆ AddRoundKey()

◆ AES128_decrypt()

◆ AES128_encrypt()

◆ AES128_init()

◆ AES192_decrypt()

◆ AES192_encrypt()

◆ AES192_init()

◆ AES256_decrypt()

◆ AES256_encrypt()

◆ AES256_init()

◆ AES_decrypt()

◆ AES_encrypt()

◆ AES_setup()

◆ GetOneColumn()

◆ InvShiftRows()

◆ KeySetupColumnMix()

◆ KeySetupTransform()

◆ LoadByte()

◆ LoadBytes()

◆ MixColumns()

◆ MultX()

◆ SaveBytes()

◆ ShiftRows()

◆ SubBytes()