#include <stdint.h>
#include <string.h>
#include "aes128.h"

Data Structures
struct	aes128_ctx

Macros
#define	AES_BLOCK_SIZE 16
#define	AES_KEY_SIZE 16
#define	AES_NUM_ROUNDS 10
#define	AES_KEY_EXP_SIZE 176 /* 16 * (10 + 1) */
#define	MULTIPLY(x, y)

Functions
static uint8_t	xtime (uint8_t x)
static void	key_expansion (aes128_ctx *ctx, const uint8_t key[16])
static void	add_round_key (uint8_t round, uint8_t state[4][4], const uint8_t *round_key)
static void	sub_bytes (uint8_t state[4][4])
static void	inv_sub_bytes (uint8_t state[4][4])
static void	shift_rows (uint8_t state[4][4])
static void	inv_shift_rows (uint8_t state[4][4])
static void	mix_columns (uint8_t state[4][4])
static void	inv_mix_columns (uint8_t state[4][4])
static void	cipher (uint8_t state[4][4], const uint8_t *round_key)
static void	inv_cipher (uint8_t state[4][4], const uint8_t *round_key)
static void	xor_block (uint8_t buf, const uint8_t xor_val)
void	aes128_cbc_encrypt (const uint8_t key[16], const uint8_t iv[16], uint8_t *data, uint32_t length)
	AES-128 CBC encrypt data in-place.
void	aes128_cbc_decrypt (const uint8_t key[16], const uint8_t iv[16], uint8_t *data, uint32_t length)
	AES-128 CBC decrypt data in-place.

Variables
static const uint8_t	sbox [256]
static const uint8_t	rsbox [256]
static const uint8_t	rcon [11] = {0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36}

Macro Definition Documentation

◆ AES_BLOCK_SIZE

#define AES_BLOCK_SIZE 16

Definition at line 27 of file aes128.c.

Referenced by aes128_cbc_decrypt(), aes128_cbc_encrypt(), and xor_block().

◆ AES_KEY_EXP_SIZE

#define AES_KEY_EXP_SIZE 176 /* 16 * (10 + 1) */

Definition at line 30 of file aes128.c.

◆ AES_KEY_SIZE

#define AES_KEY_SIZE 16

Definition at line 28 of file aes128.c.

Referenced by key_expansion().

◆ AES_NUM_ROUNDS

#define AES_NUM_ROUNDS 10

Definition at line 29 of file aes128.c.

Referenced by cipher(), inv_cipher(), and key_expansion().

◆ MULTIPLY

#define MULTIPLY	(		x,
			y )

Value:

(((y & 1) * x) ^ ((y >> 1 & 1) * xtime(x)) ^ ((y >> 2 & 1) * xtime(xtime(x))) ^ \

((y >> 3 & 1) * xtime(xtime(xtime(x)))) ^ ((y >> 4 & 1) * xtime(xtime(xtime(xtime(x))))))

xtime

static uint8_t xtime(uint8_t x)

Definition aes128.c:74

Definition at line 215 of file aes128.c.

Referenced by inv_mix_columns().

Function Documentation

◆ add_round_key()

void add_round_key	(	uint8_t	round,
		uint8_t	state[4][4],
		const uint8_t *	round_key )

static

Definition at line 118 of file aes128.c.

Referenced by cipher(), and inv_cipher().

◆ aes128_cbc_decrypt()

void aes128_cbc_decrypt	(	const uint8_t	key[16],
		const uint8_t	iv[16],
		uint8_t *	data,
		uint32_t	length )

AES-128 CBC decrypt data in-place.

Parameters

key	16-byte decryption key.
iv	16-byte initialization vector (not modified).
data	Buffer to decrypt in-place. Must be a multiple of 16 bytes.
length	Number of bytes to decrypt. Must be a multiple of 16.

Definition at line 290 of file aes128.c.

References AES_BLOCK_SIZE, inv_cipher(), key_expansion(), aes128_ctx::round_key, and xor_block().

Referenced by ps3_decrypt_sector(), wii_decrypt_group(), and wiiu_decrypt_physical_sector().

◆ aes128_cbc_encrypt()

void aes128_cbc_encrypt	(	const uint8_t	key[16],
		const uint8_t	iv[16],
		uint8_t *	data,
		uint32_t	length )

AES-128 CBC encrypt data in-place.

Parameters

key	16-byte encryption key.
iv	16-byte initialization vector (not modified).
data	Buffer to encrypt in-place. Must be a multiple of 16 bytes.
length	Number of bytes to encrypt. Must be a multiple of 16.

Definition at line 274 of file aes128.c.

References AES_BLOCK_SIZE, cipher(), key_expansion(), aes128_ctx::round_key, and xor_block().

Referenced by ps3_derive_disc_key(), ps3_encrypt_sector(), wii_encrypt_group(), and wiiu_encrypt_physical_sector().

◆ cipher()

void cipher	(	uint8_t	state[4][4],
		const uint8_t *	round_key )

static

Definition at line 235 of file aes128.c.

References add_round_key(), AES_NUM_ROUNDS, mix_columns(), shift_rows(), and sub_bytes().

Referenced by aes128_cbc_encrypt().

◆ inv_cipher()

void inv_cipher	(	uint8_t	state[4][4],
		const uint8_t *	round_key )

static

Definition at line 252 of file aes128.c.

References add_round_key(), AES_NUM_ROUNDS, inv_mix_columns(), inv_shift_rows(), and inv_sub_bytes().

Referenced by aes128_cbc_decrypt().

◆ inv_mix_columns()

void inv_mix_columns ( uint8_t state[4][4] )

static

Definition at line 219 of file aes128.c.

References MULTIPLY.

Referenced by inv_cipher().

◆ inv_shift_rows()

void inv_shift_rows ( uint8_t state[4][4] )

static

Definition at line 163 of file aes128.c.

Referenced by inv_cipher().

◆ inv_sub_bytes()

void inv_sub_bytes ( uint8_t state[4][4] )

static

Definition at line 130 of file aes128.c.

References rsbox.

Referenced by inv_cipher().

◆ key_expansion()

void key_expansion	(	aes128_ctx *	ctx,
		const uint8_t	key[16] )

static

Definition at line 76 of file aes128.c.

References AES_KEY_SIZE, AES_NUM_ROUNDS, rcon, aes128_ctx::round_key, and sbox.

Referenced by aes128_cbc_decrypt(), and aes128_cbc_encrypt().

◆ mix_columns()

void mix_columns ( uint8_t state[4][4] )

static

Definition at line 190 of file aes128.c.

References xtime().

Referenced by cipher().

◆ shift_rows()

void shift_rows ( uint8_t state[4][4] )

static

Definition at line 136 of file aes128.c.

Referenced by cipher().

◆ sub_bytes()

void sub_bytes ( uint8_t state[4][4] )

static

Definition at line 124 of file aes128.c.

References sbox.

Referenced by cipher().

◆ xor_block()

void xor_block	(	uint8_t *	buf,
		const uint8_t *	xor_val )

static

Definition at line 269 of file aes128.c.

References AES_BLOCK_SIZE.

Referenced by aes128_cbc_decrypt(), and aes128_cbc_encrypt().

◆ xtime()

uint8_t xtime ( uint8_t x )

static

Definition at line 74 of file aes128.c.

Referenced by mix_columns().

Variable Documentation

◆ rcon

const uint8_t rcon[11] = {0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36}

static

Definition at line 67 of file aes128.c.

Referenced by key_expansion().

◆ rsbox

const uint8_t rsbox[256]

static

Initial value:

                       = {
0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb, 0x7c, 0xe3, 0x39,
0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb, 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2,
0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e, 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76,
0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25, 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc,
0x5d, 0x65, 0xb6, 0x92, 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d,
0x84, 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06, 0xd0, 0x2c,
0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b, 0x3a, 0x91, 0x11, 0x41, 0x4f,
0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73, 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85,
0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e, 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62,
0x0e, 0xaa, 0x18, 0xbe, 0x1b, 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd,
0x5a, 0xf4, 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f, 0x60,
0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef, 0xa0, 0xe0, 0x3b, 0x4d,
0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61, 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6,
0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d}

Definition at line 50 of file aes128.c.

Referenced by inv_sub_bytes().

◆ sbox

const uint8_t sbox[256]

static

Initial value:

                      = {
0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76, 0xca, 0x82, 0xc9,
0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f,
0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07,
0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3,
0x29, 0xe3, 0x2f, 0x84, 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58,
0xcf, 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, 0x51, 0xa3,
0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, 0xcd, 0x0c, 0x13, 0xec, 0x5f,
0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88,
0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac,
0x62, 0x91, 0x95, 0xe4, 0x79, 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a,
0xae, 0x08, 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, 0x70,
0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, 0xe1, 0xf8, 0x98, 0x11,
0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42,
0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16}

Definition at line 33 of file aes128.c.

Referenced by key_expansion(), and sub_bytes().

Data Structures

Macros

Functions

Variables

Macro Definition Documentation

◆ AES_BLOCK_SIZE

◆ AES_KEY_EXP_SIZE

◆ AES_KEY_SIZE

◆ AES_NUM_ROUNDS

◆ MULTIPLY

Function Documentation

◆ add_round_key()

◆ aes128_cbc_decrypt()

◆ aes128_cbc_encrypt()

◆ cipher()

◆ inv_cipher()

◆ inv_mix_columns()

◆ inv_shift_rows()

◆ inv_sub_bytes()

◆ key_expansion()

◆ mix_columns()

◆ shift_rows()

◆ sub_bytes()

◆ xor_block()

◆ xtime()

Variable Documentation

◆ rcon

◆ rsbox

◆ sbox