| 1 | /* $Id: base64.h 98103 2023-01-17 14:15:46Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * IPRT - Base64, MIME content transfer encoding, internal header.
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 2009-2023 Oracle and/or its affiliates.
|
|---|
| 8 | *
|
|---|
| 9 | * This file is part of VirtualBox base platform packages, as
|
|---|
| 10 | * available from https://www.virtualbox.org.
|
|---|
| 11 | *
|
|---|
| 12 | * This program is free software; you can redistribute it and/or
|
|---|
| 13 | * modify it under the terms of the GNU General Public License
|
|---|
| 14 | * as published by the Free Software Foundation, in version 3 of the
|
|---|
| 15 | * License.
|
|---|
| 16 | *
|
|---|
| 17 | * This program is distributed in the hope that it will be useful, but
|
|---|
| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
|
|---|
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|---|
| 20 | * General Public License for more details.
|
|---|
| 21 | *
|
|---|
| 22 | * You should have received a copy of the GNU General Public License
|
|---|
| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
|
|---|
| 24 | *
|
|---|
| 25 | * The contents of this file may alternatively be used under the terms
|
|---|
| 26 | * of the Common Development and Distribution License Version 1.0
|
|---|
| 27 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
|
|---|
| 28 | * in the VirtualBox distribution, in which case the provisions of the
|
|---|
| 29 | * CDDL are applicable instead of those of the GPL.
|
|---|
| 30 | *
|
|---|
| 31 | * You may elect to license modified versions of this file under the
|
|---|
| 32 | * terms and conditions of either the GPL or the CDDL or both.
|
|---|
| 33 | *
|
|---|
| 34 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
|
|---|
| 35 | */
|
|---|
| 36 |
|
|---|
| 37 | #ifndef IPRT_INCLUDED_SRC_common_string_base64_h
|
|---|
| 38 | #define IPRT_INCLUDED_SRC_common_string_base64_h
|
|---|
| 39 | #ifndef RT_WITHOUT_PRAGMA_ONCE
|
|---|
| 40 | # pragma once
|
|---|
| 41 | #endif
|
|---|
| 42 |
|
|---|
| 43 |
|
|---|
| 44 | /*********************************************************************************************************************************
|
|---|
| 45 | * Defined Constants And Macros *
|
|---|
| 46 | *********************************************************************************************************************************/
|
|---|
| 47 | /** The line length used for encoding. */
|
|---|
| 48 | #define RTBASE64_LINE_LEN 64
|
|---|
| 49 |
|
|---|
| 50 | /** @name Special g_au8rtBase64CharToVal values
|
|---|
| 51 | * @{ */
|
|---|
| 52 | #define BASE64_SPACE 0xc0
|
|---|
| 53 | #define BASE64_PAD 0xe0
|
|---|
| 54 | #define BASE64_NULL 0xfe
|
|---|
| 55 | #define BASE64_INVALID 0xff
|
|---|
| 56 | /** @} */
|
|---|
| 57 |
|
|---|
| 58 |
|
|---|
| 59 | /*********************************************************************************************************************************
|
|---|
| 60 | * Global Variables *
|
|---|
| 61 | *********************************************************************************************************************************/
|
|---|
| 62 | extern DECL_HIDDEN_DATA(const uint8_t) g_au8rtBase64CharToVal[256];
|
|---|
| 63 | extern DECL_HIDDEN_DATA(const char) g_szrtBase64ValToChar[64+1];
|
|---|
| 64 | extern DECL_HIDDEN_DATA(const size_t) g_acchrtBase64EolStyles[RTBASE64_FLAGS_EOL_STYLE_MASK + 1];
|
|---|
| 65 | extern DECL_HIDDEN_DATA(const char) g_aachrtBase64EolStyles[RTBASE64_FLAGS_EOL_STYLE_MASK + 1][2];
|
|---|
| 66 |
|
|---|
| 67 |
|
|---|
| 68 | /*********************************************************************************************************************************
|
|---|
| 69 | * Internal Functions *
|
|---|
| 70 | *********************************************************************************************************************************/
|
|---|
| 71 | #ifdef RT_STRICT
|
|---|
| 72 | DECLHIDDEN(void) rtBase64Sanity(void);
|
|---|
| 73 | #endif
|
|---|
| 74 |
|
|---|
| 75 |
|
|---|
| 76 | /**
|
|---|
| 77 | * Recalcs 6-bit to 8-bit and adjust for padding.
|
|---|
| 78 | */
|
|---|
| 79 | DECLINLINE(ssize_t) rtBase64DecodedSizeRecalc(uint32_t c6Bits, unsigned cbPad)
|
|---|
| 80 | {
|
|---|
| 81 | size_t cb;
|
|---|
| 82 | if (c6Bits * 3 / 3 == c6Bits)
|
|---|
| 83 | {
|
|---|
| 84 | if ((c6Bits * 3 % 4) != 0)
|
|---|
| 85 | return -1;
|
|---|
| 86 | cb = c6Bits * 3 / 4;
|
|---|
| 87 | }
|
|---|
| 88 | else
|
|---|
| 89 | {
|
|---|
| 90 | if ((c6Bits * (uint64_t)3 % 4) != 0)
|
|---|
| 91 | return -1;
|
|---|
| 92 | cb = c6Bits * (uint64_t)3 / 4;
|
|---|
| 93 | }
|
|---|
| 94 |
|
|---|
| 95 | if (cb < cbPad)
|
|---|
| 96 | return -1;
|
|---|
| 97 | cb -= cbPad;
|
|---|
| 98 | return cb;
|
|---|
| 99 | }
|
|---|
| 100 |
|
|---|
| 101 | #endif /* !IPRT_INCLUDED_SRC_common_string_base64_h */
|
|---|
