This is xnu-4903.221.2. See this file in:
/*
 *  ccdigest_internal.h
 *  corecrypto
 *
 *  Created on 12/20/2017
 *
 *  Copyright (c) 2017 Apple Inc. All rights reserved.
 *
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 *
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 *
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 *
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
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 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */

#ifndef _CORECRYPTO_CCDIGEST_INTERNAL_H_
#define _CORECRYPTO_CCDIGEST_INTERNAL_H_

#include <corecrypto/ccdigest.h>

void ccdigest_final_common(const struct ccdigest_info *di,
                           ccdigest_ctx_t ctx, void *digest);
void ccdigest_final_64be(const struct ccdigest_info *di, ccdigest_ctx_t,
                         unsigned char *digest);
void ccdigest_final_64le(const struct ccdigest_info *di, ccdigest_ctx_t,
                         unsigned char *digest);

#endif /* _CORECRYPTO_CCDIGEST_INTERNAL_H_ */