| 1 | /* $Id: base64.h 84296 2020-05-13 16:46:27Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * IPRT - Base64, MIME content transfer encoding, internal header.
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 2009-2020 Oracle Corporation
|
|---|
| 8 | *
|
|---|
| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
|
|---|
| 10 | * available from http://www.virtualbox.org. This file is free software;
|
|---|
| 11 | * you can redistribute it and/or modify it under the terms of the GNU
|
|---|
| 12 | * General Public License (GPL) as published by the Free Software
|
|---|
| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
|
|---|
| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
|
|---|
| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
|
|---|
| 16 | *
|
|---|
| 17 | * The contents of this file may alternatively be used under the terms
|
|---|
| 18 | * of the Common Development and Distribution License Version 1.0
|
|---|
| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
|
|---|
| 20 | * VirtualBox OSE distribution, in which case the provisions of the
|
|---|
| 21 | * CDDL are applicable instead of those of the GPL.
|
|---|
| 22 | *
|
|---|
| 23 | * You may elect to license modified versions of this file under the
|
|---|
| 24 | * terms and conditions of either the GPL or the CDDL or both.
|
|---|
| 25 | */
|
|---|
| 26 |
|
|---|
| 27 |
|
|---|
| 28 | /*********************************************************************************************************************************
|
|---|
| 29 | * Defined Constants And Macros *
|
|---|
| 30 | *********************************************************************************************************************************/
|
|---|
| 31 | /** The line length used for encoding. */
|
|---|
| 32 | #define RTBASE64_LINE_LEN 64
|
|---|
| 33 |
|
|---|
| 34 | /** @name Special g_au8rtBase64CharToVal values
|
|---|
| 35 | * @{ */
|
|---|
| 36 | #define BASE64_SPACE 0xc0
|
|---|
| 37 | #define BASE64_PAD 0xe0
|
|---|
| 38 | #define BASE64_NULL 0xfe
|
|---|
| 39 | #define BASE64_INVALID 0xff
|
|---|
| 40 | /** @} */
|
|---|
| 41 |
|
|---|
| 42 |
|
|---|
| 43 | /*********************************************************************************************************************************
|
|---|
| 44 | * Global Variables *
|
|---|
| 45 | *********************************************************************************************************************************/
|
|---|
| 46 | extern DECLHIDDEN(const uint8_t) g_au8rtBase64CharToVal[256];
|
|---|
| 47 | extern DECLHIDDEN(const char) g_szrtBase64ValToChar[64+1];
|
|---|
| 48 | extern DECLHIDDEN(const size_t) g_acchrtBase64EolStyles[RTBASE64_FLAGS_EOL_STYLE_MASK + 1];
|
|---|
| 49 | extern DECLHIDDEN(const char) g_aachrtBase64EolStyles[RTBASE64_FLAGS_EOL_STYLE_MASK + 1][2];
|
|---|
| 50 |
|
|---|
| 51 |
|
|---|
| 52 | /*********************************************************************************************************************************
|
|---|
| 53 | * Internal Functions *
|
|---|
| 54 | *********************************************************************************************************************************/
|
|---|
| 55 | #ifdef RT_STRICT
|
|---|
| 56 | DECLHIDDEN(void) rtBase64Sanity(void);
|
|---|
| 57 | #endif
|
|---|
| 58 |
|
|---|
| 59 |
|
|---|
| 60 | /**
|
|---|
| 61 | * Recalcs 6-bit to 8-bit and adjust for padding.
|
|---|
| 62 | */
|
|---|
| 63 | DECLINLINE(ssize_t) rtBase64DecodedSizeRecalc(uint32_t c6Bits, unsigned cbPad)
|
|---|
| 64 | {
|
|---|
| 65 | size_t cb;
|
|---|
| 66 | if (c6Bits * 3 / 3 == c6Bits)
|
|---|
| 67 | {
|
|---|
| 68 | if ((c6Bits * 3 % 4) != 0)
|
|---|
| 69 | return -1;
|
|---|
| 70 | cb = c6Bits * 3 / 4;
|
|---|
| 71 | }
|
|---|
| 72 | else
|
|---|
| 73 | {
|
|---|
| 74 | if ((c6Bits * (uint64_t)3 % 4) != 0)
|
|---|
| 75 | return -1;
|
|---|
| 76 | cb = c6Bits * (uint64_t)3 / 4;
|
|---|
| 77 | }
|
|---|
| 78 |
|
|---|
| 79 | if (cb < cbPad)
|
|---|
| 80 | return -1;
|
|---|
| 81 | cb -= cbPad;
|
|---|
| 82 | return cb;
|
|---|
| 83 | }
|
|---|
| 84 |
|
|---|
