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/*
* Copyright 2018 The OpenSSL Project Authors. All Rights Reserved.
* Copyright (c) 2018, Oracle and/or its affiliates. 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
*/
#include <stdio.h>
#include <stdlib.h>
#include "internal/cryptlib.h"
#include <openssl/engine.h>
#include <openssl/evp.h>
#include <openssl/x509v3.h>
#include <openssl/kdf.h>
#include "internal/asn1_int.h"
#include "internal/evp_int.h"
#include "internal/numbers.h"
#include "evp_locl.h"
typedef int sk_cmp_fn_type(const char *const *a, const char *const *b);
/* This array needs to be in order of NIDs */
static const EVP_KDF_METHOD *standard_methods[] = {
&pbkdf2_kdf_meth,
#ifndef OPENSSL_NO_SCRYPT
&scrypt_kdf_meth,
#endif
&tls1_prf_kdf_meth,
&hkdf_kdf_meth,
&sshkdf_kdf_meth,
};
DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_KDF_METHOD *, const EVP_KDF_METHOD *,
kmeth);
static int kmeth_cmp(const EVP_KDF_METHOD *const *a,
const EVP_KDF_METHOD *const *b)
{
return ((*a)->type - (*b)->type);
}
IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_KDF_METHOD *, const EVP_KDF_METHOD *,
kmeth);
static const EVP_KDF_METHOD *kdf_meth_find(int type)
{
EVP_KDF_METHOD tmp;
const EVP_KDF_METHOD *t = &tmp, **ret;
tmp.type = type;
ret = OBJ_bsearch_kmeth(&t, standard_methods,
OSSL_NELEM(standard_methods));
if (ret == NULL || *ret == NULL)
return NULL;
return *ret;
}
EVP_KDF_CTX *EVP_KDF_CTX_new_id(int id)
{
EVP_KDF_CTX *ret;
const EVP_KDF_METHOD *kmeth;
kmeth = kdf_meth_find(id);
if (kmeth == NULL) {
EVPerr(EVP_F_EVP_KDF_CTX_NEW_ID, EVP_R_UNSUPPORTED_ALGORITHM);
return NULL;
}
ret = OPENSSL_zalloc(sizeof(*ret));
if (ret == NULL) {
EVPerr(EVP_F_EVP_KDF_CTX_NEW_ID, ERR_R_MALLOC_FAILURE);
return NULL;
}
if (kmeth->new != NULL && (ret->impl = kmeth->new()) == NULL) {
EVP_KDF_CTX_free(ret);
return NULL;
}
ret->kmeth = kmeth;
return ret;
}
void EVP_KDF_CTX_free(EVP_KDF_CTX *ctx)
{
if (ctx == NULL)
return;
ctx->kmeth->free(ctx->impl);
OPENSSL_free(ctx);
}
void EVP_KDF_reset(EVP_KDF_CTX *ctx)
{
if (ctx == NULL)
return;
if (ctx->kmeth->reset != NULL)
ctx->kmeth->reset(ctx->impl);
}
int EVP_KDF_ctrl(EVP_KDF_CTX *ctx, int cmd, ...)
{
int ret;
va_list args;
va_start(args, cmd);
ret = EVP_KDF_vctrl(ctx, cmd, args);
va_end(args);
if (ret == -2)
EVPerr(EVP_F_EVP_KDF_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
return ret;
}
int EVP_KDF_vctrl(EVP_KDF_CTX *ctx, int cmd, va_list args)
{
if (ctx == NULL)
return 0;
return ctx->kmeth->ctrl(ctx->impl, cmd, args);
}
int EVP_KDF_ctrl_str(EVP_KDF_CTX *ctx, const char *type, const char *value)
{
int ret;
if (ctx == NULL)
return 0;
if (ctx->kmeth->ctrl_str == NULL) {
EVPerr(EVP_F_EVP_KDF_CTRL_STR, EVP_R_COMMAND_NOT_SUPPORTED);
return -2;
}
ret = ctx->kmeth->ctrl_str(ctx->impl, type, value);
if (ret == -2)
EVPerr(EVP_F_EVP_KDF_CTRL_STR, EVP_R_COMMAND_NOT_SUPPORTED);
return ret;
}
size_t EVP_KDF_size(EVP_KDF_CTX *ctx)
{
if (ctx == NULL)
return 0;
if (ctx->kmeth->size == NULL)
return SIZE_MAX;
return ctx->kmeth->size(ctx->impl);
}
int EVP_KDF_derive(EVP_KDF_CTX *ctx, unsigned char *key, size_t keylen)
{
if (ctx == NULL)
return 0;
return ctx->kmeth->derive(ctx->impl, key, keylen);
}
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