/** @file * IPRT - Base64, MIME content transfer encoding. */ /* * Copyright (C) 2009-2020 Oracle Corporation * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License (GPL) as published by the Free Software * Foundation, in version 2 as it comes in the "COPYING" file of the * VirtualBox OSE distribution. VirtualBox OSE is distributed in the * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. * * The contents of this file may alternatively be used under the terms * of the Common Development and Distribution License Version 1.0 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the * VirtualBox OSE 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. */ #ifndef IPRT_INCLUDED_base64_h #define IPRT_INCLUDED_base64_h #ifndef RT_WITHOUT_PRAGMA_ONCE # pragma once #endif #include RT_C_DECLS_BEGIN /** @defgroup grp_rt_base64 RTBase64 - Base64, MIME content transfer encoding. * @ingroup grp_rt * @{ */ /** @def RTBASE64_EOL_SIZE * The size of the end-of-line marker. */ #if defined(RT_OS_OS2) || defined(RT_OS_WINDOWS) # define RTBASE64_EOL_SIZE (sizeof("\r\n") - 1) #else # define RTBASE64_EOL_SIZE (sizeof("\n") - 1) #endif /** @name Flags for RTBase64EncodeEx() and RTBase64EncodedLengthEx(). * @{ */ /** Insert line breaks into encoded string. * The size of the end-of-line marker is that that of the host platform. */ #define RTBASE64_FLAGS_NO_LINE_BREAKS RT_BIT_32(0) /** @} */ /** * Calculates the decoded data size for a Base64 encoded string. * * @returns The length in bytes. -1 if the encoding is bad. * * @param pszString The Base64 encoded string. * @param ppszEnd If not NULL, this will point to the first char * following the Base64 encoded text block. If * NULL the entire string is assumed to be Base64. */ RTDECL(ssize_t) RTBase64DecodedSize(const char *pszString, char **ppszEnd); /** * Calculates the decoded data size for a Base64 encoded string. * * @returns The length in bytes. -1 if the encoding is bad. * * @param pszString The Base64 encoded string. * @param cchStringMax The max length to decode, use RTSTR_MAX if the * length of @a pszString is not known and it is * really zero terminated. * @param ppszEnd If not NULL, this will point to the first char * following the Base64 encoded text block. If * NULL the entire string is assumed to be Base64. */ RTDECL(ssize_t) RTBase64DecodedSizeEx(const char *pszString, size_t cchStringMax, char **ppszEnd); /** * Decodes a Base64 encoded string into the buffer supplied by the caller. * * @returns IPRT status code. * @retval VERR_BUFFER_OVERFLOW if the buffer is too small. pcbActual will not * be set, nor will ppszEnd. * @retval VERR_INVALID_BASE64_ENCODING if the encoding is wrong. * * @param pszString The Base64 string. Whether the entire string or * just the start of the string is in Base64 depends * on whether ppszEnd is specified or not. * @param pvData Where to store the decoded data. * @param cbData The size of the output buffer that pvData points to. * @param pcbActual Where to store the actual number of bytes returned. * Optional. * @param ppszEnd Indicates that the string may contain other stuff * after the Base64 encoded data when not NULL. Will * be set to point to the first char that's not part of * the encoding. If NULL the entire string must be part * of the Base64 encoded data. */ RTDECL(int) RTBase64Decode(const char *pszString, void *pvData, size_t cbData, size_t *pcbActual, char **ppszEnd); /** * Decodes a Base64 encoded string into the buffer supplied by the caller. * * @returns IPRT status code. * @retval VERR_BUFFER_OVERFLOW if the buffer is too small. pcbActual will not * be set, nor will ppszEnd. * @retval VERR_INVALID_BASE64_ENCODING if the encoding is wrong. * * @param pszString The Base64 string. Whether the entire string or * just the start of the string is in Base64 depends * on whether ppszEnd is specified or not. * @param cchStringMax The max length to decode, use RTSTR_MAX if the * length of @a pszString is not known and it is * really zero terminated. * @param pvData Where to store the decoded data. * @param cbData The size of the output buffer that pvData points to. * @param pcbActual Where to store the actual number of bytes returned. * Optional. * @param ppszEnd Indicates that the string may contain other stuff * after the Base64 encoded data when not NULL. Will * be set to point to the first char that's not part of * the encoding. If NULL the entire string must be part * of the Base64 encoded data. */ RTDECL(int) RTBase64DecodeEx(const char *pszString, size_t cchStringMax, void *pvData, size_t cbData, size_t *pcbActual, char **ppszEnd); /** * Calculates the length of the Base64 encoding of a given number of bytes of * data produced by RTBase64Encode(). * * @returns The Base64 string length. * @param cbData The number of bytes to encode. */ RTDECL(size_t) RTBase64EncodedLength(size_t cbData); /** * Calculates the length of the Base64 encoding of a given number of bytes of * data produced by RTBase64EncodeEx() with the same @a fFlags. * * @returns The Base64 string length. * @param cbData The number of bytes to encode. * @param fFlags Flags, any combination of the RTBASE64_FLAGS \#defines. */ RTDECL(size_t) RTBase64EncodedLengthEx(size_t cbData, uint32_t fFlags); /** * Encodes the specifed data into a Base64 string, the caller supplies the * output buffer. * * This is equivalent to calling RTBase64EncodeEx() with no flags. * * @returns IRPT status code. * @retval VERR_BUFFER_OVERFLOW if the output buffer is too small. The buffer * may contain an invalid Base64 string. * * @param pvData The data to encode. * @param cbData The number of bytes to encode. * @param pszBuf Where to put the Base64 string. * @param cbBuf The size of the output buffer, including the terminator. * @param pcchActual The actual number of characters returned. */ RTDECL(int) RTBase64Encode(const void *pvData, size_t cbData, char *pszBuf, size_t cbBuf, size_t *pcchActual); /** * Encodes the specifed data into a Base64 string, the caller supplies the * output buffer. * * @returns IRPT status code. * @retval VERR_BUFFER_OVERFLOW if the output buffer is too small. The buffer * may contain an invalid Base64 string. * * @param pvData The data to encode. * @param cbData The number of bytes to encode. * @param fFlags Flags, any combination of the RTBASE64_FLAGS \#defines. * @param pszBuf Where to put the Base64 string. * @param cbBuf The size of the output buffer, including the terminator. * @param pcchActual The actual number of characters returned. */ RTDECL(int) RTBase64EncodeEx(const void *pvData, size_t cbData, uint32_t fFlags, char *pszBuf, size_t cbBuf, size_t *pcchActual); /** @} */ RT_C_DECLS_END #endif /* !IPRT_INCLUDED_base64_h */