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/** @file
* IPRT - Message-Digest algorithm 5.
*/
/*
* Copyright (C) 2006-2025 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
#ifndef IPRT_INCLUDED_md5_h
#define IPRT_INCLUDED_md5_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
#include <iprt/types.h>
/** @defgroup grp_rt_md5 RTMd5 - Message-Digest algorithm 5
* @ingroup grp_rt
* @{
*/
/** Size of a MD5 hash. */
#define RTMD5_HASH_SIZE 16
/** @deprecated Use RTMD5_HASH_SIZE. */
#define RTMD5HASHSIZE RTMD5_HASH_SIZE
/** The length of a MD5 digest string. The terminator is not included. */
#define RTMD5_DIGEST_LEN 32
/** Size of a MD5 hash.
* @deprecated Use RTMD5_DIGEST_LEN */
#define RTMD5_STRING_LEN RTMD5_DIGEST_LEN
/**
* MD5 hash algorithm context.
*/
typedef union RTMD5CONTEXT
{
uint64_t u64BetterAlignment;
uint8_t abPadding[(4 + 6 + 16 + 1) * sizeof(uint32_t)];
/** Context used by md5-alt.cpp. */
struct
{
uint32_t in[16];
uint32_t buf[4];
uint32_t bits[2];
} AltPrivate;
#ifdef RT_MD5_OPENSSL_PRIVATE_CONTEXT
/** Context used by md5-openssl.cpp. */
MD5_CTX OsslPrivate;
#endif
} RTMD5CONTEXT;
/** Pointer to MD5 hash algorithm context. */
typedef RTMD5CONTEXT *PRTMD5CONTEXT;
RT_C_DECLS_BEGIN
/**
* Compute the MD5 hash of the data.
*
* @param pvBuf Pointer to data.
* @param cbBuf Length of data (in bytes).
* @param pabDigest Where to store the hash.
* (What's passed is a pointer to the caller's buffer.)
*/
RTDECL(void) RTMd5(const void *pvBuf, size_t cbBuf, uint8_t pabDigest[RTMD5HASHSIZE]);
/**
* Initialize MD5 context.
*
* @param pCtx Pointer to the MD5 context to initialize.
*/
RTDECL(void) RTMd5Init(PRTMD5CONTEXT pCtx);
/**
* Feed data into the MD5 computation.
*
* @param pCtx Pointer to the MD5 context.
* @param pvBuf Pointer to data.
* @param cbBuf Length of data (in bytes).
*/
RTDECL(void) RTMd5Update(PRTMD5CONTEXT pCtx, const void *pvBuf, size_t cbBuf);
/**
* Compute the MD5 hash of the data.
*
* @param pabDigest Where to store the hash.
* (What's passed is a pointer to the caller's buffer.)
* @param pCtx Pointer to the MD5 context.
*/
RTDECL(void) RTMd5Final(uint8_t pabDigest[RTMD5HASHSIZE], PRTMD5CONTEXT pCtx);
/**
* Converts a MD5 hash to a digest string.
*
* @returns IPRT status code.
*
* @param pabDigest The binary digest returned by RTMd5Final or RTMd5.
* @param pszDigest Where to return the stringified digest.
* @param cchDigest The size of the output buffer. Should be at least
* RTMD5_STRING_LEN + 1 bytes.
*/
RTDECL(int) RTMd5ToString(uint8_t const pabDigest[RTMD5_HASH_SIZE], char *pszDigest, size_t cchDigest);
/**
* Converts a MD5 hash to a digest string.
*
* @returns IPRT status code.
*
* @param pszDigest The stringified digest. Leading and trailing spaces are
* ignored.
* @param pabDigest Where to store the hash. (What is passed is a pointer to
* the caller's buffer.)
*/
RTDECL(int) RTMd5FromString(char const *pszDigest, uint8_t pabDigest[RTMD5_HASH_SIZE]);
RT_C_DECLS_END
/** @} */
#endif /* !IPRT_INCLUDED_md5_h */
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