algo_sha256.c

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// SPDX-FileCopyrightText: 2021 deroad <wargio@libero.it>
// SPDX-License-Identifier: LGPL-3.0-only
 
#include <rz_hash.h>
#include <rz_util/rz_assert.h>
 
#if HAVE_LIB_SSL
#include "../algorithms/openssl_common.h"
rz_openssl_plugin_define_hash_cfg(sha256, EVP_sha256, true);
 
#else /* HAVE_LIB_SSL */
#include "../algorithms/sha2/sha2.h"
 
static void *plugin_sha256_context_new() {
    return RZ_NEW0(RZ_SHA256_CTX);
}
 
static void plugin_sha256_context_free(void *context) {
    free(context);
}
 
static RzHashSize plugin_sha256_digest_size(void *context) {
    return SHA256_DIGEST_LENGTH;
}
 
static RzHashSize plugin_sha256_block_size(void *context) {
    return SHA256_BLOCK_LENGTH;
}
 
static bool plugin_sha256_init(void *context) {
    rz_return_val_if_fail(context, false);
 
    SHA256_Init((RZ_SHA256_CTX *)context);
    return true;
}
 
static bool plugin_sha256_update(void *context, const ut8 *data, ut64 size) {
    rz_return_val_if_fail(context && data, false);
 
    SHA256_Update((RZ_SHA256_CTX *)context, data, size);
    return true;
}
 
static bool plugin_sha256_final(void *context, ut8 *digest) {
    rz_return_val_if_fail(context && digest, false);
 
    SHA256_Final(digest, (RZ_SHA256_CTX *)context);
    return true;
}
 
static bool plugin_sha256_small_block(const ut8 *data, ut64 size, ut8 **digest, RzHashSize *digest_size) {
    rz_return_val_if_fail(data && digest, false);
    ut8 *dgst = malloc(SHA256_DIGEST_LENGTH);
    if (!dgst) {
        return false;
    }
 
    RZ_SHA256_CTX ctx;
    SHA256_Init(&ctx);
    SHA256_Update(&ctx, data, size);
    SHA256_Final(dgst, &ctx);
 
    *digest = dgst;
    if (digest_size) {
        *digest_size = SHA256_DIGEST_LENGTH;
    }
    return true;
}
 
RzHashPlugin rz_hash_plugin_sha256 = {
    .name = "sha256",
    .author = "Aaron D. Gifford",
    .license = "BSD-3",
    .support_hmac = true,
    .context_new = plugin_sha256_context_new,
    .context_free = plugin_sha256_context_free,
    .digest_size = plugin_sha256_digest_size,
    .block_size = plugin_sha256_block_size,
    .init = plugin_sha256_init,
    .update = plugin_sha256_update,
    .final = plugin_sha256_final,
    .small_block = plugin_sha256_small_block,
};
 
#endif /* HAVE_LIB_SSL */
 
#ifndef RZ_PLUGIN_INCORE
RZ_API RzLibStruct rizin_plugin = {
    .type = RZ_LIB_TYPE_HASH,
    .data = &rz_hash_plugin_sha256,
    .version = RZ_VERSION
};
#endif