openssl/crypto/evp/e_seed.c

/*
 * Copyright 2007-2020 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the Apache License 2.0 (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

/*
 * SEED low level APIs are deprecated for public use, but still ok for
 * internal use.
 */
#include "internal/deprecated.h"

#include <openssl/opensslconf.h>
#include <openssl/evp.h>
#include <openssl/err.h>
#include <string.h>
#include <assert.h>
#include <openssl/seed.h>
#include "crypto/evp.h"
#include "evp_local.h"

static int seed_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
                         const unsigned char *iv, int enc);

typedef struct {
    SEED_KEY_SCHEDULE ks;
} EVP_SEED_KEY;

IMPLEMENT_BLOCK_CIPHER(seed, ks, SEED, EVP_SEED_KEY, NID_seed,
                       16, 16, 16, 128, EVP_CIPH_FLAG_DEFAULT_ASN1,
                       seed_init_key, 0, 0, 0, 0)

static int seed_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
                         const unsigned char *iv, int enc)
{
    SEED_set_key(key, &EVP_C_DATA(EVP_SEED_KEY, ctx)->ks);
    return 1;
}