crypto_base91.c

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// SPDX-FileCopyrightText: 2016-2017 rakholiyajenish.07 <rakholiyajenish.07@gmail.com>
// SPDX-License-Identifier: LGPL-3.0-only
 
#include <rz_lib.h>
#include <rz_crypto.h>
#include <rz_util.h>
 
#define INSIZE 32768
 
static bool base91_set_key(RzCrypto *cry, const ut8 *key, int keylen, int mode, int direction) {
    cry->dir = direction;
    return true;
}
 
static int base91_get_key_size(RzCrypto *cry) {
    return 0;
}
 
static bool base91_use(const char *algo) {
    return algo && !strcmp(algo, "base91");
}
 
static bool update(RzCrypto *cry, const ut8 *buf, int len) {
    if (len < 1) {
        return false;
    }
 
    int olen = INSIZE;
    if (!cry || !buf || len < 1) {
        return false;
    }
    ut8 *obuf = malloc(olen);
    if (!obuf) {
        return false;
    }
    if (cry->dir == RZ_CRYPTO_DIR_ENCRYPT) {
        olen = rz_base91_encode((char *)obuf, (const ut8 *)buf, len);
    } else if (cry->dir == 1) {
        olen = rz_base91_decode(obuf, (const char *)buf, len);
    } else {
        free(obuf);
        return false;
    }
    rz_crypto_append(cry, obuf, olen);
    free(obuf);
    return true;
}
 
static bool final(RzCrypto *cry, const ut8 *buf, int len) {
    return update(cry, buf, len);
}
 
RzCryptoPlugin rz_crypto_plugin_base91 = {
    .name = "base91",
    .author = "rakholiyajenish.07",
    .license = "LGPL-3",
    .set_key = base91_set_key,
    .get_key_size = base91_get_key_size,
    .use = base91_use,
    .update = update,
    .final = final
};
 
#ifndef RZ_PLUGIN_INCORE
RZ_API RzLibStruct rizin_plugin = {
    .type = RZ_LIB_TYPE_CRYPTO,
    .data = &rz_crypto_plugin_base91,
    .version = RZ_VERSION
};
#endif