diff options
Diffstat (limited to 'boost/beast/core/detail/base64.hpp')
| -rw-r--r-- | boost/beast/core/detail/base64.hpp | 182 |
1 files changed, 20 insertions, 162 deletions
diff --git a/boost/beast/core/detail/base64.hpp b/boost/beast/core/detail/base64.hpp index 6cb3f67a77..7f91c04777 100644 --- a/boost/beast/core/detail/base64.hpp +++ b/boost/beast/core/detail/base64.hpp @@ -1,5 +1,5 @@ // -// Copyright (c) 2016-2017 Vinnie Falco (vinnie dot falco at gmail dot com) +// Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco at gmail dot com) // // Distributed under the Boost Software License, Version 1.0. (See accompanying // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) @@ -7,39 +7,10 @@ // Official repository: https://github.com/boostorg/beast // -/* - Portions from http://www.adp-gmbh.ch/cpp/common/base64.html - Copyright notice: - - base64.cpp and base64.h - - Copyright (C) 2004-2008 Rene Nyffenegger - - This source code is provided 'as-is', without any express or implied - warranty. In no event will the author be held liable for any damages - arising from the use of this software. - - Permission is granted to anyone to use this software for any purpose, - including commercial applications, and to alter it and redistribute it - freely, subject to the following restrictions: - - 1. The origin of this source code must not be misrepresented; you must not - claim that you wrote the original source code. If you use this source code - in a product, an acknowledgment in the product documentation would be - appreciated but is not required. - - 2. Altered source versions must be plainly marked as such, and must not be - misrepresented as being the original source code. - - 3. This notice may not be removed or altered from any source distribution. - - Rene Nyffenegger rene.nyffenegger@adp-gmbh.ch - -*/ - #ifndef BOOST_BEAST_DETAIL_BASE64_HPP #define BOOST_BEAST_DETAIL_BASE64_HPP +#include <boost/beast/core/string.hpp> #include <cctype> #include <string> #include <utility> @@ -50,44 +21,16 @@ namespace detail { namespace base64 { -inline +BOOST_BEAST_DECL char const* -get_alphabet() -{ - static char constexpr tab[] = { - "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/" - }; - return &tab[0]; -} +get_alphabet(); -inline +BOOST_BEAST_DECL signed char const* -get_inverse() -{ - static signed char constexpr tab[] = { - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 0-15 - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 16-31 - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63, // 32-47 - 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1, // 48-63 - -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, // 64-79 - 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, // 80-95 - -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, // 96-111 - 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1, // 112-127 - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 128-143 - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 144-159 - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 160-175 - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 176-191 - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 192-207 - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 208-223 - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 224-239 - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 // 240-255 - }; - return &tab[0]; -} - +get_inverse(); /// Returns max chars needed to encode a base64 string -inline +BOOST_BEAST_DECL std::size_t constexpr encoded_size(std::size_t n) { @@ -100,7 +43,6 @@ std::size_t constexpr decoded_size(std::size_t n) { return n / 4 * 3; // requires n&3==0, smaller - //return 3 * n / 4; } /** Encode a series of octets as a padded, base64 string. @@ -115,45 +57,9 @@ decoded_size(std::size_t n) @return The number of characters written to `out`. This will exclude any null termination. */ -template<class = void> +BOOST_BEAST_DECL std::size_t -encode(void* dest, void const* src, std::size_t len) -{ - char* out = static_cast<char*>(dest); - char const* in = static_cast<char const*>(src); - auto const tab = base64::get_alphabet(); - - for(auto n = len / 3; n--;) - { - *out++ = tab[ (in[0] & 0xfc) >> 2]; - *out++ = tab[((in[0] & 0x03) << 4) + ((in[1] & 0xf0) >> 4)]; - *out++ = tab[((in[2] & 0xc0) >> 6) + ((in[1] & 0x0f) << 2)]; - *out++ = tab[ in[2] & 0x3f]; - in += 3; - } - - switch(len % 3) - { - case 2: - *out++ = tab[ (in[0] & 0xfc) >> 2]; - *out++ = tab[((in[0] & 0x03) << 4) + ((in[1] & 0xf0) >> 4)]; - *out++ = tab[ (in[1] & 0x0f) << 2]; - *out++ = '='; - break; - - case 1: - *out++ = tab[ (in[0] & 0xfc) >> 2]; - *out++ = tab[((in[0] & 0x03) << 4)]; - *out++ = '='; - *out++ = '='; - break; - - case 0: - break; - } - - return out - static_cast<char*>(dest); -} +encode(void* dest, void const* src, std::size_t len); /** Decode a padded base64 string into a series of octets. @@ -166,75 +72,23 @@ encode(void* dest, void const* src, std::size_t len) the number of characters read from the input string, expressed as a pair. */ -template<class = void> +BOOST_BEAST_DECL std::pair<std::size_t, std::size_t> -decode(void* dest, char const* src, std::size_t len) -{ - char* out = static_cast<char*>(dest); - auto in = reinterpret_cast<unsigned char const*>(src); - unsigned char c3[3], c4[4]; - int i = 0; - int j = 0; - - auto const inverse = base64::get_inverse(); - - while(len-- && *in != '=') - { - auto const v = inverse[*in]; - if(v == -1) - break; - ++in; - c4[i] = v; - if(++i == 4) - { - c3[0] = (c4[0] << 2) + ((c4[1] & 0x30) >> 4); - c3[1] = ((c4[1] & 0xf) << 4) + ((c4[2] & 0x3c) >> 2); - c3[2] = ((c4[2] & 0x3) << 6) + c4[3]; - - for(i = 0; i < 3; i++) - *out++ = c3[i]; - i = 0; - } - } - - if(i) - { - c3[0] = ( c4[0] << 2) + ((c4[1] & 0x30) >> 4); - c3[1] = ((c4[1] & 0xf) << 4) + ((c4[2] & 0x3c) >> 2); - c3[2] = ((c4[2] & 0x3) << 6) + c4[3]; - - for(j = 0; j < i - 1; j++) - *out++ = c3[j]; - } - - return {out - static_cast<char*>(dest), - in - reinterpret_cast<unsigned char const*>(src)}; -} +decode(void* dest, char const* src, std::size_t len); } // base64 -template<class = void> +BOOST_BEAST_DECL std::string -base64_encode (std::uint8_t const* data, - std::size_t len) -{ - std::string dest; - dest.resize(base64::encoded_size(len)); - dest.resize(base64::encode(&dest[0], data, len)); - return dest; -} +base64_encode(std::uint8_t const* data, std::size_t len); -inline +BOOST_BEAST_DECL std::string -base64_encode(std::string const& s) -{ - return base64_encode (reinterpret_cast < - std::uint8_t const*> (s.data()), s.size()); -} +base64_encode(string_view s); template<class = void> std::string -base64_decode(std::string const& data) +base64_decode(string_view data) { std::string dest; dest.resize(base64::decoded_size(data.size())); @@ -248,4 +102,8 @@ base64_decode(std::string const& data) } // beast } // boost +#ifdef BOOST_BEAST_HEADER_ONLY +#include <boost/beast/core/detail/base64.ipp> +#endif + #endif |