des.c File Reference

#include "des.h"
#include <string.h>

Include dependency graph for des.c:

Go to the source code of this file.

Macros
#define	XYSSL_DES_C
#define	GET_ULONG_BE(n, b, i)
#define	PUT_ULONG_BE(n, b, i)
#define	DES_IP(X, Y)
#define	DES_FP(X, Y)
#define	DES_ROUND(X, Y)
#define	SWAP(a, b)   { unsigned long t = a; a = b; b = t; t = 0; }

Functions
void	des_setkey_enc (des_context *ctx, unsigned char key[8])
	DES key schedule (56-bit, encryption) More...
void	des_setkey_dec (des_context *ctx, unsigned char key[8])
	DES key schedule (56-bit, decryption) More...
void	des3_set2key_enc (des3_context *ctx, unsigned char key[16])
	Triple-DES key schedule (112-bit, encryption) More...
void	des3_set2key_dec (des3_context *ctx, unsigned char key[16])
	Triple-DES key schedule (112-bit, decryption) More...
void	des3_set3key_enc (des3_context *ctx, unsigned char key[24])
	Triple-DES key schedule (168-bit, encryption) More...
void	des3_set3key_dec (des3_context *ctx, unsigned char key[24])
	Triple-DES key schedule (168-bit, decryption) More...
void	des_crypt_ecb (des_context *ctx, unsigned char input[8], unsigned char output[8])
	DES-ECB block encryption/decryption. More...
void	des_crypt_cbc (des_context *ctx, int mode, int length, unsigned char iv[8], unsigned char *input, unsigned char *output)
	DES-CBC buffer encryption/decryption. More...
void	des3_crypt_ecb (des3_context *ctx, unsigned char input[8], unsigned char output[8])
	3DES-ECB block encryption/decryption More...
void	des3_crypt_cbc (des3_context *ctx, int mode, int length, unsigned char iv[8], unsigned char *input, unsigned char *output)
	3DES-CBC buffer encryption/decryption More...

Macro Definition Documentation

DES_FP

#define DES_FP	(		X,
			Y
	)

Value:

{                                                               \
    X = ((X << 31) | (X >> 1)) & 0xFFFFFFFF;                    \
    T = (X ^ Y) & 0xAAAAAAAA; X ^= T; Y ^= T;                   \
    Y = ((Y << 31) | (Y >> 1)) & 0xFFFFFFFF;                    \
    T = ((Y >>  8) ^ X) & 0x00FF00FF; X ^= T; Y ^= (T <<  8);   \
    T = ((Y >>  2) ^ X) & 0x33333333; X ^= T; Y ^= (T <<  2);   \
    T = ((X >> 16) ^ Y) & 0x0000FFFF; Y ^= T; X ^= (T << 16);   \
    T = ((X >>  4) ^ Y) & 0x0F0F0F0F; Y ^= T; X ^= (T <<  4);   \
}

Definition at line 259 of file des.c.

DES_IP

#define DES_IP	(		X,
			Y
	)

Value:

{                                                               \
    T = ((X >>  4) ^ Y) & 0x0F0F0F0F; Y ^= T; X ^= (T <<  4);   \
    T = ((X >> 16) ^ Y) & 0x0000FFFF; Y ^= T; X ^= (T << 16);   \
    T = ((Y >>  2) ^ X) & 0x33333333; X ^= T; Y ^= (T <<  2);   \
    T = ((Y >>  8) ^ X) & 0x00FF00FF; X ^= T; Y ^= (T <<  8);   \
    Y = ((Y << 1) | (Y >> 31)) & 0xFFFFFFFF;                    \
    T = (X ^ Y) & 0xAAAAAAAA; Y ^= T; X ^= T;                   \
    X = ((X << 1) | (X >> 31)) & 0xFFFFFFFF;                    \
}

Definition at line 245 of file des.c.

DES_ROUND

#define DES_ROUND	(		X,
			Y
	)

Value:

{                                               \
    T = *SK++ ^ X;                              \
    Y ^= SB8[ (T      ) & 0x3F ] ^              \
         SB6[ (T >>  8) & 0x3F ] ^              \
         SB4[ (T >> 16) & 0x3F ] ^              \
         SB2[ (T >> 24) & 0x3F ];               \
                                                \
    T = *SK++ ^ ((X << 28) | (X >> 4));         \
    Y ^= SB7[ (T      ) & 0x3F ] ^              \
         SB5[ (T >>  8) & 0x3F ] ^              \
         SB3[ (T >> 16) & 0x3F ] ^              \
         SB1[ (T >> 24) & 0x3F ];               \
}

Definition at line 273 of file des.c.

GET_ULONG_BE

#define GET_ULONG_BE	(		n,
			b,
			i
	)

Value:

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

Definition at line 41 of file des.c.

PUT_ULONG_BE

#define PUT_ULONG_BE	(		n,
			b,
			i
	)

Value:

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

Definition at line 51 of file des.c.

SWAP

#define SWAP	(		a,
			b
	)		{ unsigned long t = a; a = b; b = t; t = 0; }

Definition at line 288 of file des.c.

XYSSL_DES_C

#define XYSSL_DES_C

Definition at line 29 of file des.c.

Function Documentation

des3_crypt_cbc()

void des3_crypt_cbc	(	des3_context *	ctx,
		int	mode,
		int	length,
		unsigned char	iv[8],
		unsigned char *	input,
		unsigned char *	output
	)

3DES-CBC buffer encryption/decryption

Parameters

ctx	3DES context
mode	DES_ENCRYPT or DES_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 595 of file des.c.

des3_crypt_ecb()

void des3_crypt_ecb	(	des3_context *	ctx,
		unsigned char	input[8],
		unsigned char	output[8]
	)

3DES-ECB block encryption/decryption

Parameters

ctx	3DES context
input	64-bit input block
output	64-bit output block

Definition at line 554 of file des.c.

des3_set2key_dec()

void des3_set2key_dec	(	des3_context *	ctx,
		unsigned char	key[16]
	)

Triple-DES key schedule (112-bit, decryption)

Parameters

ctx	3DES context to be initialized
key	16-byte secret key

Definition at line 422 of file des.c.

des3_set2key_enc()

void des3_set2key_enc	(	des3_context *	ctx,
		unsigned char	key[16]
	)

Triple-DES key schedule (112-bit, encryption)

Parameters

ctx	3DES context to be initialized
key	16-byte secret key

Definition at line 411 of file des.c.

des3_set3key_dec()

void des3_set3key_dec	(	des3_context *	ctx,
		unsigned char	key[24]
	)

Triple-DES key schedule (168-bit, decryption)

Parameters

ctx	3DES context to be initialized
key	24-byte secret key

Definition at line 467 of file des.c.

des3_set3key_enc()

void des3_set3key_enc	(	des3_context *	ctx,
		unsigned char	key[24]
	)

Triple-DES key schedule (168-bit, encryption)

Parameters

ctx	3DES context to be initialized
key	24-byte secret key

Definition at line 456 of file des.c.

des_crypt_cbc()

void des_crypt_cbc	(	des_context *	ctx,
		int	mode,
		int	length,
		unsigned char	iv[8],
		unsigned char *	input,
		unsigned char *	output
	)

DES-CBC buffer encryption/decryption.

Parameters

ctx	DES context
mode	DES_ENCRYPT or DES_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 507 of file des.c.

des_crypt_ecb()

void des_crypt_ecb	(	des_context *	ctx,
		unsigned char	input[8],
		unsigned char	output[8]
	)

DES-ECB block encryption/decryption.

Parameters

ctx	DES context
input	64-bit input block
output	64-bit output block

Definition at line 478 of file des.c.

des_setkey_dec()

void des_setkey_dec	(	des_context *	ctx,
		unsigned char	key[8]
	)

DES key schedule (56-bit, decryption)

Parameters

ctx	DES context to be initialized
key	8-byte secret key

Definition at line 370 of file des.c.

des_setkey_enc()

void des_setkey_enc	(	des_context *	ctx,
		unsigned char	key[8]
	)

DES key schedule (56-bit, encryption)

Parameters

ctx	DES context to be initialized
key	8-byte secret key

Definition at line 362 of file des.c.