aes.64.c File Reference

AES encryption and decryption functions. More...

#include <aes.h>
#include <memory.h>

Macros
#define	GET_UINT32_LE(n, b, i)
#define	PUT_UINT32_LE(n, b, i)
#define	AES_FROUND(X0, X1, X2, X3, Y0, Y1, Y2, Y3)
#define	AES_RROUND(X0, X1, X2, X3, Y0, Y1, Y2, Y3)
#define	ROTL8(x)   ( ( x << 8 ) & 0xFFFFFFFF ) | ( x >> 24 )
#define	XTIME(x)   ( ( x << 1 ) ^ ( ( x & 0x80 ) ? 0x1B : 0x00 ) )
#define	MUL(x, y)   ( ( x && y ) ? pow[(log[x] + log[y]) % 255] : 0 )
#define	MIX(x, y)   { y = ( (y << 1) | (y >> 7) ) & 0xFF; x ^= y; }
#define	CPY128

Functions
	MODULE ("turnstone.lib.crypto")
int32_t	aes_set_encryption_key (aes_context_t *ctx, const uint8_t *key, uint32_t keysize)
int32_t	aes_set_decryption_key (aes_context_t *ctx, const uint8_t *key, uint32_t keysize)
void	aes_init_keygen_tables (void)
int32_t	aes_setkey (aes_context_t *ctx, int32_t mode, const uint8_t *key, uint32_t keysize)
int32_t	aes_cipher (aes_context_t *ctx, const uint8_t input[16], uint8_t output[16])

Variables
static int32_t	aes_tables_inited = 0
static uint8_t	AES_FSb [256] = {0}
static uint32_t	AES_FT0 [256] = {0}
static uint32_t	AES_FT1 [256] = {0}
static uint32_t	AES_FT2 [256] = {0}
static uint32_t	AES_FT3 [256] = {0}
static uint8_t	AES_RSb [256] = {0}
static uint32_t	AES_RT0 [256] = {0}
static uint32_t	AES_RT1 [256] = {0}
static uint32_t	AES_RT2 [256] = {0}
static uint32_t	AES_RT3 [256] = {0}
static uint32_t	AES_RCON [10] = {0}

Detailed Description

AES encryption and decryption functions.

This work is licensed under TURNSTONE OS Public License. Please read and understand latest version of Licence.

Macro Definition Documentation

AES_FROUND

#define AES_FROUND	(		X0,
			X1,
			X2,
			X3,
			Y0,
			Y1,
			Y2,
			Y3
	)

Value:

        {                                               \
            X0 = *RK++ ^ AES_FT0[ ( Y0       ) & 0xFF ] ^   \
                 AES_FT1[ ( Y1 >>  8 ) & 0xFF ] ^   \
                 AES_FT2[ ( Y2 >> 16 ) & 0xFF ] ^   \
                 AES_FT3[ ( Y3 >> 24 ) & 0xFF ];    \
                                                \
            X1 = *RK++ ^ AES_FT0[ ( Y1       ) & 0xFF ] ^   \
                 AES_FT1[ ( Y2 >>  8 ) & 0xFF ] ^   \
                 AES_FT2[ ( Y3 >> 16 ) & 0xFF ] ^   \
                 AES_FT3[ ( Y0 >> 24 ) & 0xFF ];    \
                                                \
            X2 = *RK++ ^ AES_FT0[ ( Y2       ) & 0xFF ] ^   \
                 AES_FT1[ ( Y3 >>  8 ) & 0xFF ] ^   \
                 AES_FT2[ ( Y0 >> 16 ) & 0xFF ] ^   \
                 AES_FT3[ ( Y1 >> 24 ) & 0xFF ];    \
                                                \
            X3 = *RK++ ^ AES_FT0[ ( Y3       ) & 0xFF ] ^   \
                 AES_FT1[ ( Y0 >>  8 ) & 0xFF ] ^   \
                 AES_FT2[ ( Y1 >> 16 ) & 0xFF ] ^   \
                 AES_FT3[ ( Y2 >> 24 ) & 0xFF ];    \
        }

AES_RROUND

#define AES_RROUND	(		X0,
			X1,
			X2,
			X3,
			Y0,
			Y1,
			Y2,
			Y3
	)

Value:

        {                                               \
            X0 = *RK++ ^ AES_RT0[ ( Y0       ) & 0xFF ] ^   \
                 AES_RT1[ ( Y3 >>  8 ) & 0xFF ] ^   \
                 AES_RT2[ ( Y2 >> 16 ) & 0xFF ] ^   \
                 AES_RT3[ ( Y1 >> 24 ) & 0xFF ];    \
                                                \
            X1 = *RK++ ^ AES_RT0[ ( Y1       ) & 0xFF ] ^   \
                 AES_RT1[ ( Y0 >>  8 ) & 0xFF ] ^   \
                 AES_RT2[ ( Y3 >> 16 ) & 0xFF ] ^   \
                 AES_RT3[ ( Y2 >> 24 ) & 0xFF ];    \
                                                \
            X2 = *RK++ ^ AES_RT0[ ( Y2       ) & 0xFF ] ^   \
                 AES_RT1[ ( Y1 >>  8 ) & 0xFF ] ^   \
                 AES_RT2[ ( Y0 >> 16 ) & 0xFF ] ^   \
                 AES_RT3[ ( Y3 >> 24 ) & 0xFF ];    \
                                                \
            X3 = *RK++ ^ AES_RT0[ ( Y3       ) & 0xFF ] ^   \
                 AES_RT1[ ( Y2 >>  8 ) & 0xFF ] ^   \
                 AES_RT2[ ( Y1 >> 16 ) & 0xFF ] ^   \
                 AES_RT3[ ( Y0 >> 24 ) & 0xFF ];    \
        }

CPY128

#define CPY128

Value:

                   { *RK++ = *SK++; *RK++ = *SK++; \
                   *RK++ = *SK++; *RK++ = *SK++; }

GET_UINT32_LE

#define GET_UINT32_LE	(		n,
			b,
			i
	)

Value:

            {                  \
            (n) = ( (uint32_t) (b)[(i)    ]       )     \
                  | ( (uint32_t) (b)[(i) + 1] <<  8 )     \
                  | ( (uint32_t) (b)[(i) + 2] << 16 )     \
                  | ( (uint32_t) (b)[(i) + 3] << 24 ); }

PUT_UINT32_LE

#define PUT_UINT32_LE	(		n,
			b,
			i
	)

Value:

            {                  \
            (b)[(i)    ] = (uint8_t) ( (n)       );       \
            (b)[(i) + 1] = (uint8_t) ( (n) >>  8 );       \
            (b)[(i) + 2] = (uint8_t) ( (n) >> 16 );       \
            (b)[(i) + 3] = (uint8_t) ( (n) >> 24 ); }