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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 <string.h>
#include <stdarg.h>
#include <openssl/kdf.h>
#include <openssl/evp.h>
#include "internal/cryptlib.h"
#include "internal/evp_int.h"
#include "internal/numbers.h"
#include "kdf_local.h"
int call_ctrl(int (*ctrl)(EVP_KDF_IMPL *impl, int cmd, va_list args),
EVP_KDF_IMPL *impl, int cmd, ...)
{
int ret;
va_list args;
va_start(args, cmd);
ret = ctrl(impl, cmd, args);
va_end(args);
return ret;
}
/* Utility functions to send a string or hex string to a ctrl */
int kdf_str2ctrl(EVP_KDF_IMPL *impl,
int (*ctrl)(EVP_KDF_IMPL *impl, int cmd, va_list args),
int cmd, const char *str)
{
return call_ctrl(ctrl, impl, cmd, (const unsigned char *)str, strlen(str));
}
int kdf_hex2ctrl(EVP_KDF_IMPL *impl,
int (*ctrl)(EVP_KDF_IMPL *impl, int cmd, va_list args),
int cmd, const char *hex)
{
unsigned char *bin;
long binlen;
int ret = -1;
bin = OPENSSL_hexstr2buf(hex, &binlen);
if (bin == NULL)
return 0;
if (binlen <= INT_MAX)
ret = call_ctrl(ctrl, impl, cmd, bin, (size_t)binlen);
OPENSSL_free(bin);
return ret;
}
/* Pass a message digest to a ctrl */
int kdf_md2ctrl(EVP_KDF_IMPL *impl,
int (*ctrl)(EVP_KDF_IMPL *impl, int cmd, va_list args),
int cmd, const char *md_name)
{
const EVP_MD *md;
if (md_name == NULL || (md = EVP_get_digestbyname(md_name)) == NULL) {
KDFerr(KDF_F_KDF_MD2CTRL, KDF_R_INVALID_DIGEST);
return 0;
}
return call_ctrl(ctrl, impl, cmd, md);
}
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