/home/dko/Projects/mobilec/src/security/xyssl-0.9/library/aes.c File Reference

#include "xyssl/config.h"
#include "xyssl/aes.h"
#include "xyssl/padlock.h"
#include <string.h>
#include <stdio.h>

Go to the source code of this file.

Defines
#define	GET_ULONG_LE(n, b, i)
#define	PUT_ULONG_LE(n, b, i)
#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	AES_FROUND(X0, X1, X2, X3, Y0, Y1, Y2, Y3)
#define	AES_RROUND(X0, X1, X2, X3, Y0, Y1, Y2, Y3)
Functions
static void	aes_gen_tables (void)
void	aes_setkey_enc (aes_context ctx, unsigned char key, int keysize)
	AES key schedule (encryption).
void	aes_setkey_dec (aes_context ctx, unsigned char key, int keysize)
	AES key schedule (decryption).
void	aes_crypt_ecb (aes_context *ctx, int mode, unsigned char input[16], unsigned char output[16])
	AES-ECB block encryption/decryption.
void	aes_crypt_cbc (aes_context ctx, int mode, int length, unsigned char iv[16], unsigned char input, unsigned char *output)
	AES-CBC buffer encryption/decryption.
void	aes_crypt_cfb (aes_context ctx, int mode, int length, int iv_off, unsigned char iv[16], unsigned char input, unsigned char output)
	AES-CFB buffer encryption/decryption.
int	aes_self_test (int verbose)
	Checkup routine.
Variables
static unsigned char	FSb [256]
static unsigned long	FT0 [256]
static unsigned long	FT1 [256]
static unsigned long	FT2 [256]
static unsigned long	FT3 [256]
static unsigned char	RSb [256]
static unsigned long	RT0 [256]
static unsigned long	RT1 [256]
static unsigned long	RT2 [256]
static unsigned long	RT3 [256]
static unsigned long	RCON [10]
static int	aes_init_done = 0
static const unsigned char	aes_test_ecb_dec [3][16]
static const unsigned char	aes_test_ecb_enc [3][16]
static const unsigned char	aes_test_cbc_dec [3][16]
static const unsigned char	aes_test_cbc_enc [3][16]
static const unsigned char	aes_test_cfb_dec [3][16]
static const unsigned char	aes_test_cfb_enc [3][16]

Define Documentation

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

Value:

{                                               \
    X0 = *RK++ ^ FT0[ ( Y0       ) & 0xFF ] ^   \
                 FT1[ ( Y1 >>  8 ) & 0xFF ] ^   \
                 FT2[ ( Y2 >> 16 ) & 0xFF ] ^   \
                 FT3[ ( Y3 >> 24 ) & 0xFF ];    \
                                                \
    X1 = *RK++ ^ FT0[ ( Y1       ) & 0xFF ] ^   \
                 FT1[ ( Y2 >>  8 ) & 0xFF ] ^   \
                 FT2[ ( Y3 >> 16 ) & 0xFF ] ^   \
                 FT3[ ( Y0 >> 24 ) & 0xFF ];    \
                                                \
    X2 = *RK++ ^ FT0[ ( Y2       ) & 0xFF ] ^   \
                 FT1[ ( Y3 >>  8 ) & 0xFF ] ^   \
                 FT2[ ( Y0 >> 16 ) & 0xFF ] ^   \
                 FT3[ ( Y1 >> 24 ) & 0xFF ];    \
                                                \
    X3 = *RK++ ^ FT0[ ( Y3       ) & 0xFF ] ^   \
                 FT1[ ( Y0 >>  8 ) & 0xFF ] ^   \
                 FT2[ ( Y1 >> 16 ) & 0xFF ] ^   \
                 FT3[ ( Y2 >> 24 ) & 0xFF ];    \
}

Definition at line 590 of file aes.c.

Referenced by aes_crypt_ecb().

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

Value:

{                                               \
    X0 = *RK++ ^ RT0[ ( Y0       ) & 0xFF ] ^   \
                 RT1[ ( Y3 >>  8 ) & 0xFF ] ^   \
                 RT2[ ( Y2 >> 16 ) & 0xFF ] ^   \
                 RT3[ ( Y1 >> 24 ) & 0xFF ];    \
                                                \
    X1 = *RK++ ^ RT0[ ( Y1       ) & 0xFF ] ^   \
                 RT1[ ( Y0 >>  8 ) & 0xFF ] ^   \
                 RT2[ ( Y3 >> 16 ) & 0xFF ] ^   \
                 RT3[ ( Y2 >> 24 ) & 0xFF ];    \
                                                \
    X2 = *RK++ ^ RT0[ ( Y2       ) & 0xFF ] ^   \
                 RT1[ ( Y1 >>  8 ) & 0xFF ] ^   \
                 RT2[ ( Y0 >> 16 ) & 0xFF ] ^   \
                 RT3[ ( Y3 >> 24 ) & 0xFF ];    \
                                                \
    X3 = *RK++ ^ RT0[ ( Y3       ) & 0xFF ] ^   \
                 RT1[ ( Y2 >>  8 ) & 0xFF ] ^   \
                 RT2[ ( Y1 >> 16 ) & 0xFF ] ^   \
                 RT3[ ( Y0 >> 24 ) & 0xFF ];    \
}

Definition at line 613 of file aes.c.

Referenced by aes_crypt_ecb().

#define GET_ULONG_LE	(	n,
		b,
		i	)

Value:

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

Definition at line 40 of file aes.c.

Referenced by aes_crypt_ecb(), aes_setkey_enc(), and md5_process().

#define MUL	(	x,
		y		)	( ( x && y ) ? pow[(log[x]+log[y]) % 255] : 0 )

Definition at line 354 of file aes.c.

Referenced by aes_gen_tables().

#define PUT_ULONG_LE	(	n,
		b,
		i	)

Value:

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

Definition at line 50 of file aes.c.

Referenced by aes_crypt_ecb(), and md5_finish().

#define ROTL8 ( x ) ( ( x << 8 ) & 0xFFFFFFFF ) | ( x >> 24 )

Definition at line 352 of file aes.c.

Referenced by aes_gen_tables().

#define XTIME ( x ) ( ( x << 1 ) ^ ( ( x & 0x80 ) ? 0x1B : 0x00 ) )

Definition at line 353 of file aes.c.

Referenced by aes_gen_tables().

Function Documentation

void aes_crypt_cbc	(	aes_context *	ctx,
		int	mode,
		int	length,
		unsigned char	iv[16],
		unsigned char *	input,
		unsigned char *	output
	)

AES-CBC buffer encryption/decryption.

Parameters:

	ctx	AES context
	mode	AES_ENCRYPT or AES_DECRYPT
	length	length of the input data
	iv	initialization vector (updated after use)
	input	buffer holding the input data
	output	buffer holding the output data

Definition at line 732 of file aes.c.

References aes_crypt_ecb(), and AES_DECRYPT.

Referenced by aes_self_test(), main(), ssl_decrypt_buf(), and ssl_encrypt_buf().

void aes_crypt_cfb	(	aes_context *	ctx,
		int	mode,
		int	length,
		int *	iv_off,
		unsigned char	iv[16],
		unsigned char *	input,
		unsigned char *	output
	)

AES-CFB buffer encryption/decryption.

Parameters:

	ctx	AES context
	mode	AES_ENCRYPT or AES_DECRYPT
	length	length of the input data
	iv_off	offset in IV (updated after use)
	iv	initialization vector (updated after use)
	input	buffer holding the input data
	output	buffer holding the output data

Definition at line 787 of file aes.c.

References aes_crypt_ecb(), AES_DECRYPT, and AES_ENCRYPT.

Referenced by aes_self_test().

void aes_crypt_ecb	(	aes_context *	ctx,
		int	mode,
		unsigned char	input[16],
		unsigned char	output[16]
	)

AES-ECB block encryption/decryption.

Parameters:

	ctx	AES context
	mode	AES_ENCRYPT or AES_DECRYPT
	input	16-byte input block
	output	16-byte output block

Definition at line 639 of file aes.c.

References AES_DECRYPT, AES_FROUND, AES_RROUND, FSb, GET_ULONG_LE, aes_context::nr, PUT_ULONG_LE, aes_context::rk, and RSb.

Referenced by aes_crypt_cbc(), aes_crypt_cfb(), aes_en_de(), aes_self_test(), and main().

static void aes_gen_tables ( void ) [static]

Definition at line 358 of file aes.c.

References FSb, FT0, FT1, FT2, FT3, MUL, RCON, ROTL8, RSb, RT0, RT1, RT2, RT3, and XTIME.

Referenced by aes_setkey_enc().

int aes_self_test ( int verbose )

Checkup routine.

Returns:: 0 if successful, or 1 if the test failed

Definition at line 902 of file aes.c.

References aes_crypt_cbc(), aes_crypt_cfb(), aes_crypt_ecb(), AES_DECRYPT, aes_setkey_dec(), aes_setkey_enc(), aes_test_cbc_dec, aes_test_cbc_enc, aes_test_cfb_dec, aes_test_cfb_enc, aes_test_ecb_dec, aes_test_ecb_enc, buf, and prv.

Referenced by main().

void aes_setkey_dec	(	aes_context *	ctx,
		unsigned char *	key,
		int	keysize
	)

AES key schedule (decryption).

Parameters:

	ctx	AES context to be initialized
	key	decryption key
	keysize	must be 128, 192 or 256

Definition at line 542 of file aes.c.

References aes_setkey_enc(), aes_context::buf, FSb, aes_context::nr, aes_context::rk, RT0, RT1, RT2, and RT3.

Referenced by aes_en_de(), aes_self_test(), main(), and ssl_derive_keys().

void aes_setkey_enc	(	aes_context *	ctx,
		unsigned char *	key,
		int	keysize
	)

AES key schedule (encryption).

Parameters:

	ctx	AES context to be initialized
	key	encryption key
	keysize	must be 128, 192 or 256

Definition at line 439 of file aes.c.

References aes_gen_tables(), aes_init_done, aes_context::buf, FSb, GET_ULONG_LE, aes_context::nr, RCON, and aes_context::rk.

Referenced by aes_en_de(), aes_self_test(), aes_setkey_dec(), main(), and ssl_derive_keys().

Variable Documentation

int aes_init_done = 0 [static]

Definition at line 356 of file aes.c.

Referenced by aes_setkey_enc().

const unsigned char aes_test_cbc_dec[3][16] [static]

Initial value:

{
    { 0xFA, 0xCA, 0x37, 0xE0, 0xB0, 0xC8, 0x53, 0x73,
      0xDF, 0x70, 0x6E, 0x73, 0xF7, 0xC9, 0xAF, 0x86 },
    { 0x5D, 0xF6, 0x78, 0xDD, 0x17, 0xBA, 0x4E, 0x75,
      0xB6, 0x17, 0x68, 0xC6, 0xAD, 0xEF, 0x7C, 0x7B },
    { 0x48, 0x04, 0xE1, 0x81, 0x8F, 0xE6, 0x29, 0x75,
      0x19, 0xA3, 0xE8, 0x8C, 0x57, 0x31, 0x04, 0x13 }
}

Definition at line 856 of file aes.c.

Referenced by aes_self_test().

const unsigned char aes_test_cbc_enc[3][16] [static]

Initial value:

{
    { 0x8A, 0x05, 0xFC, 0x5E, 0x09, 0x5A, 0xF4, 0x84,
      0x8A, 0x08, 0xD3, 0x28, 0xD3, 0x68, 0x8E, 0x3D },
    { 0x7B, 0xD9, 0x66, 0xD5, 0x3A, 0xD8, 0xC1, 0xBB,
      0x85, 0xD2, 0xAD, 0xFA, 0xE8, 0x7B, 0xB1, 0x04 },
    { 0xFE, 0x3C, 0x53, 0x65, 0x3E, 0x2F, 0x45, 0xB5,
      0x6F, 0xCD, 0x88, 0xB2, 0xCC, 0x89, 0x8F, 0xF0 }
}

Definition at line 866 of file aes.c.

Referenced by aes_self_test().

const unsigned char aes_test_cfb_dec[3][16] [static]

Initial value:

{
    { 0xBA, 0x75, 0x0C, 0xC9, 0x77, 0xF8, 0xD4, 0xE1,
      0x3E, 0x0F, 0xB5, 0x46, 0x2E, 0xA6, 0x33, 0xF6 },
    { 0xDB, 0x40, 0x4A, 0x98, 0x7B, 0xAA, 0xA3, 0xF3,
      0x92, 0x35, 0xAD, 0x58, 0x09, 0x9B, 0xFF, 0x6E },
    { 0xA8, 0x17, 0x41, 0x0E, 0x76, 0x71, 0x60, 0xE5,
      0xFD, 0x37, 0xC5, 0x43, 0xCC, 0xC8, 0xD6, 0xDA }
}

Definition at line 879 of file aes.c.

Referenced by aes_self_test().

const unsigned char aes_test_cfb_enc[3][16] [static]

Initial value:

{
    { 0x45, 0x62, 0xC5, 0xA1, 0xF9, 0x10, 0x8F, 0xE0,
      0x87, 0x24, 0x25, 0x68, 0xB5, 0x12, 0xF3, 0x8B },
    { 0xB8, 0xD4, 0xD5, 0x09, 0xF5, 0xEE, 0x08, 0x38,
      0x48, 0x9B, 0x9D, 0xAD, 0x11, 0xB4, 0x2E, 0xD2 },
    { 0xE9, 0x10, 0x80, 0xDA, 0xEE, 0x2D, 0x81, 0xD9,
      0x41, 0x78, 0x91, 0xD5, 0x98, 0x78, 0xE1, 0xFA }
}

Definition at line 889 of file aes.c.

Referenced by aes_self_test().

const unsigned char aes_test_ecb_dec[3][16] [static]

Initial value:

{
    { 0x44, 0x41, 0x6A, 0xC2, 0xD1, 0xF5, 0x3C, 0x58,
      0x33, 0x03, 0x91, 0x7E, 0x6B, 0xE9, 0xEB, 0xE0 },
    { 0x48, 0xE3, 0x1E, 0x9E, 0x25, 0x67, 0x18, 0xF2,
      0x92, 0x29, 0x31, 0x9C, 0x19, 0xF1, 0x5B, 0xA4 },
    { 0x05, 0x8C, 0xCF, 0xFD, 0xBB, 0xCB, 0x38, 0x2D,
      0x1F, 0x6F, 0x56, 0x58, 0x5D, 0x8A, 0x4A, 0xDE }
}

Definition at line 836 of file aes.c.

Referenced by aes_self_test().

const unsigned char aes_test_ecb_enc[3][16] [static]

Initial value:

{
    { 0xC3, 0x4C, 0x05, 0x2C, 0xC0, 0xDA, 0x8D, 0x73,
      0x45, 0x1A, 0xFE, 0x5F, 0x03, 0xBE, 0x29, 0x7F },
    { 0xF3, 0xF6, 0x75, 0x2A, 0xE8, 0xD7, 0x83, 0x11,
      0x38, 0xF0, 0x41, 0x56, 0x06, 0x31, 0xB1, 0x14 },
    { 0x8B, 0x79, 0xEE, 0xCC, 0x93, 0xA0, 0xEE, 0x5D,
      0xFF, 0x30, 0xB4, 0xEA, 0x21, 0x63, 0x6D, 0xA4 }
}

Definition at line 846 of file aes.c.

Referenced by aes_self_test().

unsigned char FSb[256] [static]

Definition at line 329 of file aes.c.

Referenced by aes_crypt_ecb(), aes_gen_tables(), aes_setkey_dec(), and aes_setkey_enc().

unsigned long FT0[256] [static]

Definition at line 330 of file aes.c.

Referenced by aes_gen_tables().

unsigned long FT1[256] [static]

Definition at line 331 of file aes.c.

Referenced by aes_gen_tables().

unsigned long FT2[256] [static]