crypto_xor.c File Reference

#include <rz_lib.h>
#include <rz_crypto.h>
#include <rz_util.h>

Go to the source code of this file.

Classes
struct	xor_state

Macros
#define	MAX_xor_KEY_SIZE   32768

Functions
static bool	xor_init_state (struct xor_state *const state, const ut8 *key, int keylen)
static void	xor_crypt (struct xor_state *const state, const ut8 *inbuf, ut8 *outbuf, int buflen)
static bool	xor_set_key (RzCrypto *cry, const ut8 *key, int keylen, int mode, int direction)
static int	xor_get_key_size (RzCrypto *cry)
static bool	xor_use (const char *algo)
static bool	update (RzCrypto *cry, const ut8 *buf, int len)
static bool	final (RzCrypto *cry, const ut8 *buf, int len)
static bool	xor_init (RzCrypto *cry)
static bool	xor_fini (RzCrypto *cry)

Variables
RzCryptoPlugin	rz_crypto_plugin_xor
RZ_API RzLibStruct	rizin_plugin

Macro Definition Documentation

MAX_xor_KEY_SIZE

#define MAX_xor_KEY_SIZE   32768

Definition at line 8 of file crypto_xor.c.

Function Documentation

final()

static bool final ( RzCrypto *  cry, const ut8 *  buf, int  len  )

static

Definition at line 68 of file crypto_xor.c.

                                                          {
    return update(cry, buf, len);
}

References len, and update().

update()

static bool update ( RzCrypto *  cry, const ut8 *  buf, int  len  )

static

Definition at line 54 of file crypto_xor.c.

                                                           {
    rz_return_val_if_fail(cry->user, false);
    struct xor_state *st = (struct xor_state *)cry->user;
 
    ut8 *obuf = calloc(1, len);
    if (!obuf) {
        return false;
    }
    xor_crypt(st, buf, obuf, len);
    rz_crypto_append(cry, obuf, len);
    free(obuf);
    return true;
}

References calloc(), free(), len, obuf, rz_crypto_append(), rz_return_val_if_fail, rz_crypto_t::user, and xor_crypt().

Referenced by final().

xor_crypt()

static void xor_crypt ( struct xor_state *const  state, const ut8 *  inbuf, ut8 *  outbuf, int  buflen  )

static

Definition at line 29 of file crypto_xor.c.

                                                                                                {
    int i; // index for input
    for (i = 0; i < buflen; i++) {
        outbuf[i] = inbuf[i] ^ state->key[(i % state->key_size)];
    }
}

References buflen, i, inbuf, and outbuf.

Referenced by update().

xor_fini()

static bool xor_fini ( RzCrypto *  cry )

static

Definition at line 79 of file crypto_xor.c.

                                    {
    rz_return_val_if_fail(cry, false);
    struct xor_state *state = (struct xor_state *)cry->user;
 
    if (state) {
        free(state->key);
    }
    free(cry->user);
    return true;
}

References free(), if(), rz_return_val_if_fail, and rz_crypto_t::user.

xor_get_key_size()

static int xor_get_key_size ( RzCrypto *  cry )

static

Definition at line 43 of file crypto_xor.c.

                                           {
    rz_return_val_if_fail(cry->user, 0);
    struct xor_state *st = (struct xor_state *)cry->user;
 
    return st->key_size;
}

References xor_state::key_size, rz_return_val_if_fail, and rz_crypto_t::user.

xor_init()

static bool xor_init ( RzCrypto *  cry )

static

Definition at line 72 of file crypto_xor.c.

                                    {
    rz_return_val_if_fail(cry, false);
 
    cry->user = RZ_NEW0(struct xor_state);
    return cry->user != NULL;
}

References NULL, RZ_NEW0, rz_return_val_if_fail, and rz_crypto_t::user.

xor_init_state()

static bool xor_init_state ( struct xor_state *const  state, const ut8 *  key, int  keylen  )

static

Definition at line 15 of file crypto_xor.c.

                                                                                      {
    if (!state || !key || keylen < 1) { // || keylen > MAX_xor_KEY_SIZE) {
        return false;
    }
    state->key_size = keylen;
    state->key = malloc(keylen);
    if (!state->key) {
        return false;
    }
    memcpy(state->key, key, keylen);
    return true;
}

References key, malloc(), and memcpy().

Referenced by xor_set_key().

xor_set_key()

static bool xor_set_key ( RzCrypto *  cry, const ut8 *  key, int  keylen, int  mode, int  direction  )

static

Definition at line 36 of file crypto_xor.c.

                                                                                            {
    rz_return_val_if_fail(cry->user, 0);
    struct xor_state *st = (struct xor_state *)cry->user;
 
    return xor_init_state(st, key, keylen);
}

References key, rz_return_val_if_fail, rz_crypto_t::user, and xor_init_state().

xor_use()

static bool xor_use ( const char *  algo )

static

Definition at line 50 of file crypto_xor.c.

                                      {
    return !strcmp(algo, "xor");
}

Variable Documentation

rizin_plugin

RZ_API RzLibStruct rizin_plugin

Initial value:

= {
    .type = RZ_LIB_TYPE_CRYPTO,
    .data = &rz_crypto_plugin_xor,
    .version = RZ_VERSION
}

Definition at line 104 of file crypto_xor.c.

rz_crypto_plugin_xor

RzCryptoPlugin rz_crypto_plugin_xor

Initial value:

= {
    .name = "xor",
    .author = "pancake",
    .license = "LGPL-3",
    .set_key = xor_set_key,
    .get_key_size = xor_get_key_size,
    .use = xor_use,
    .update = update,
    .final = final,
    .init = xor_init,
    .fini = xor_fini,
}

Definition at line 90 of file crypto_xor.c.