From fbd9449a310ff6c50b42717900b748b22a059e80 Mon Sep 17 00:00:00 2001 From: Tropical <42101043+tropicaaal@users.noreply.github.com> Date: Sun, 22 Mar 2026 12:16:29 -0500 Subject: [PATCH] wrong base64.cpp but whatever --- .../Platform/Common/Leaderboards/base64.cpp | 320 +++++++++++++----- .../Platform/Common/Leaderboards/base64.h | 36 +- 2 files changed, 267 insertions(+), 89 deletions(-) diff --git a/Minecraft.Client/Platform/Common/Leaderboards/base64.cpp b/Minecraft.Client/Platform/Common/Leaderboards/base64.cpp index 6c5a9d986..de32488bc 100644 --- a/Minecraft.Client/Platform/Common/Leaderboards/base64.cpp +++ b/Minecraft.Client/Platform/Common/Leaderboards/base64.cpp @@ -1,7 +1,14 @@ + /* base64.cpp and base64.h - Copyright (C) 2004-2008 Ren� Nyffenegger + base64 encoding and decoding with C++. + More information at + https://renenyffenegger.ch/notes/development/Base64/Encoding-and-decoding-base-64-with-cpp + + Version: 2.rc.09 (release candidate) + + Copyright (C) 2004-2017, 2020-2022 René 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 @@ -21,113 +28,256 @@ 3. This notice may not be removed or altered from any source distribution. - Ren� Nyffenegger rene.nyffenegger@adp-gmbh.ch + René Nyffenegger rene.nyffenegger@adp-gmbh.ch */ -#include "../../stdafx.h" - #include "base64.h" -#include -static const sstd::td::string base64_chars = - "ABCDEFGHIJKLMNOPQRSTUVWXYZ" - "abcdefghijklmnopqrstuvwxyz" - "0123456789+/"; +#include +#include -static inline bool is_base64(unsigned char c) { - return (isalnum(c) || (c == '+') || (c == '/')); + // + // Depending on the url parameter in base64_chars, one of + // two sets of base64 characters needs to be chosen. + // They differ in their last two characters. + // +static const char* base64_chars[2] = { + "ABCDEFGHIJKLMNOPQRSTUVWXYZ" + "abcdefghijklmnopqrstuvwxyz" + "0123456789" + "+/", + + "ABCDEFGHIJKLMNOPQRSTUVWXYZ" + "abcdefghijklmnopqrstuvwxyz" + "0123456789" + "-_"}; + +static unsigned int pos_of_char(const unsigned char chr) { + // + // Return the position of chr within base64_encode() + // + + if (chr >= 'A' && chr <= 'Z') return chr - 'A'; + else if (chr >= 'a' && chr <= 'z') return chr - 'a' + ('Z' - 'A') + 1; + else if (chr >= '0' && chr <= '9') return chr - '0' + ('Z' - 'A') + ('z' - 'a') + 2; + else if (chr == '+' || chr == '-') return 62; // Be liberal with input and accept both url ('-') and non-url ('+') base 64 characters ( + else if (chr == '/' || chr == '_') return 63; // Ditto for '/' and '_' + else + // + // 2020-10-23: Throw std::exception rather than const char* + //(Pablo Martin-Gomez, https://github.com/Bouska) + // + throw std::runtime_error("Input is not valid base64-encoded data."); } -// 4J ADDED, -sstd::td::string base64_encode(sstd::td::string str) { - return base64_encode(reinterpret_cast(str.c_str()), - str.length()); -} - -sstd::td::string base64_encode(unsigned char const* bytes_to_encode, - unsigned int in_len) { - std::string ret; - int i = 0; - int j = 0; - unsigned char char_array_3[3]; - unsigned char char_array_4[4]; - - while (in_len--) { - char_array_3[i++] = *(bytes_to_encode++); - if (i == 3) { - char_array_4[0] = (char_array_3[0] & 0xfc) >> 2; - char_array_4[1] = ((char_array_3[0] & 0x03) << 4) + - ((char_array_3[1] & 0xf0) >> 4); - char_array_4[2] = ((char_array_3[1] & 0x0f) << 2) + - ((char_array_3[2] & 0xc0) >> 6); - char_array_4[3] = char_array_3[2] & 0x3f; - - for (int ii = 0; (ii < 4); ii++) - ret += base64_chars[char_array_4[ii]]; - i = 0; - } +static std::string insert_linebreaks(std::string str, size_t distance) { + // + // Provided by https://github.com/JomaCorpFX, adapted by me. + // + if (!str.length()) { + return ""; } - if (i) { - for (j = i; j < 3; j++) char_array_3[j] = '\0'; + size_t pos = distance; - char_array_4[0] = (char_array_3[0] & 0xfc) >> 2; - char_array_4[1] = - ((char_array_3[0] & 0x03) << 4) + ((char_array_3[1] & 0xf0) >> 4); - char_array_4[2] = - ((char_array_3[1] & 0x0f) << 2) + ((char_array_3[2] & 0xc0) >> 6); - char_array_4[3] = char_array_3[2] & 0x3f; + while (pos < str.size()) { + str.insert(pos, "\n"); + pos += distance + 1; + } - for (j = 0; (j < i + 1); j++) ret += base64_chars[char_array_4[j]]; + return str; +} - while ((i++ < 3)) ret += '='; +template +static std::string encode_with_line_breaks(String s) { + return insert_linebreaks(base64_encode(s, false), line_length); +} + +template +static std::string encode_pem(String s) { + return encode_with_line_breaks(s); +} + +template +static std::string encode_mime(String s) { + return encode_with_line_breaks(s); +} + +template +static std::string encode(String s, bool url) { + return base64_encode(reinterpret_cast(s.data()), s.length(), url); +} + +std::string base64_encode(unsigned char const* bytes_to_encode, size_t in_len, bool url) { + + size_t len_encoded = (in_len +2) / 3 * 4; + + unsigned char trailing_char = url ? '.' : '='; + + // + // Choose set of base64 characters. They differ + // for the last two positions, depending on the url + // parameter. + // A bool (as is the parameter url) is guaranteed + // to evaluate to either 0 or 1 in C++ therefore, + // the correct character set is chosen by subscripting + // base64_chars with url. + // + const char* base64_chars_ = base64_chars[url]; + + std::string ret; + ret.reserve(len_encoded); + + unsigned int pos = 0; + + while (pos < in_len) { + ret.push_back(base64_chars_[(bytes_to_encode[pos + 0] & 0xfc) >> 2]); + + if (pos+1 < in_len) { + ret.push_back(base64_chars_[((bytes_to_encode[pos + 0] & 0x03) << 4) + ((bytes_to_encode[pos + 1] & 0xf0) >> 4)]); + + if (pos+2 < in_len) { + ret.push_back(base64_chars_[((bytes_to_encode[pos + 1] & 0x0f) << 2) + ((bytes_to_encode[pos + 2] & 0xc0) >> 6)]); + ret.push_back(base64_chars_[ bytes_to_encode[pos + 2] & 0x3f]); + } + else { + ret.push_back(base64_chars_[(bytes_to_encode[pos + 1] & 0x0f) << 2]); + ret.push_back(trailing_char); + } + } + else { + + ret.push_back(base64_chars_[(bytes_to_encode[pos + 0] & 0x03) << 4]); + ret.push_back(trailing_char); + ret.push_back(trailing_char); + } + + pos += 3; + } + + + return ret; +} + +template +static std::string decode(String const& encoded_string, bool remove_linebreaks) { + // + // decode(…) is templated so that it can be used with String = const std::string& + // or std::string_view (requires at least C++17) + // + + if (encoded_string.empty()) return std::string(); + + if (remove_linebreaks) { + + std::string copy(encoded_string); + + copy.erase(std::remove(copy.begin(), copy.end(), '\n'), copy.end()); + + return base64_decode(copy, false); + } + + size_t length_of_string = encoded_string.length(); + size_t pos = 0; + + // + // The approximate length (bytes) of the decoded string might be one or + // two bytes smaller, depending on the amount of trailing equal signs + // in the encoded string. This approximation is needed to reserve + // enough space in the string to be returned. + // + size_t approx_length_of_decoded_string = length_of_string / 4 * 3; + std::string ret; + ret.reserve(approx_length_of_decoded_string); + + while (pos < length_of_string) { + // + // Iterate over encoded input string in chunks. The size of all + // chunks except the last one is 4 bytes. + // + // The last chunk might be padded with equal signs or dots + // in order to make it 4 bytes in size as well, but this + // is not required as per RFC 2045. + // + // All chunks except the last one produce three output bytes. + // + // The last chunk produces at least one and up to three bytes. + // + + size_t pos_of_char_1 = pos_of_char(encoded_string.at(pos+1) ); + + // + // Emit the first output byte that is produced in each chunk: + // + ret.push_back(static_cast( ( (pos_of_char(encoded_string.at(pos+0)) ) << 2 ) + ( (pos_of_char_1 & 0x30 ) >> 4))); + + if ( ( pos + 2 < length_of_string ) && // Check for data that is not padded with equal signs (which is allowed by RFC 2045) + encoded_string.at(pos+2) != '=' && + encoded_string.at(pos+2) != '.' // accept URL-safe base 64 strings, too, so check for '.' also. + ) + { + // + // Emit a chunk's second byte (which might not be produced in the last chunk). + // + unsigned int pos_of_char_2 = pos_of_char(encoded_string.at(pos+2) ); + ret.push_back(static_cast( (( pos_of_char_1 & 0x0f) << 4) + (( pos_of_char_2 & 0x3c) >> 2))); + + if ( ( pos + 3 < length_of_string ) && + encoded_string.at(pos+3) != '=' && + encoded_string.at(pos+3) != '.' + ) + { + // + // Emit a chunk's third byte (which might not be produced in the last chunk). + // + ret.push_back(static_cast( ( (pos_of_char_2 & 0x03 ) << 6 ) + pos_of_char(encoded_string.at(pos+3)) )); + } + } + + pos += 4; } return ret; } -sstd::td::string base64_decode(sstd::td::string const& encoded_string) { - int in_len = encoded_string.size(); - int i = 0; - int j = 0; - int in_ = 0; - unsigned char char_array_4[4], char_array_3[3]; - std::string ret; +std::string base64_decode(std::string const& s, bool remove_linebreaks) { + return decode(s, remove_linebreaks); +} - while (in_len-- && (encoded_string[in_] != '=') && - is_base64(encoded_string[in_])) { - char_array_4[i++] = encoded_string[in_]; - in_++; - if (i == 4) { - for (i = 0; i < 4; i++) - char_array_4[i] = base64_chars.find(char_array_4[i]); +std::string base64_encode(std::string const& s, bool url) { + return encode(s, url); +} - char_array_3[0] = - (char_array_4[0] << 2) + ((char_array_4[1] & 0x30) >> 4); - char_array_3[1] = ((char_array_4[1] & 0xf) << 4) + - ((char_array_4[2] & 0x3c) >> 2); - char_array_3[2] = ((char_array_4[2] & 0x3) << 6) + char_array_4[3]; +std::string base64_encode_pem (std::string const& s) { + return encode_pem(s); +} - for (i = 0; (i < 3); i++) ret += char_array_3[i]; - i = 0; - } - } +std::string base64_encode_mime(std::string const& s) { + return encode_mime(s); +} - if (i) { - for (j = i; j < 4; j++) char_array_4[j] = 0; +#if __cplusplus >= 201703L +// +// Interface with std::string_view rather than const std::string& +// Requires C++17 +// Provided by Yannic Bonenberger (https://github.com/Yannic) +// - for (j = 0; j < 4; j++) - char_array_4[j] = base64_chars.find(char_array_4[j]); +std::string base64_encode(std::string_view s, bool url) { + return encode(s, url); +} - char_array_3[0] = - (char_array_4[0] << 2) + ((char_array_4[1] & 0x30) >> 4); - char_array_3[1] = - ((char_array_4[1] & 0xf) << 4) + ((char_array_4[2] & 0x3c) >> 2); - char_array_3[2] = ((char_array_4[2] & 0x3) << 6) + char_array_4[3]; +std::string base64_encode_pem(std::string_view s) { + return encode_pem(s); +} - for (j = 0; (j < i - 1); j++) ret += char_array_3[j]; - } +std::string base64_encode_mime(std::string_view s) { + return encode_mime(s); +} - return ret; -} \ No newline at end of file +std::string base64_decode(std::string_view s, bool remove_linebreaks) { + return decode(s, remove_linebreaks); +} + +#endif // __cplusplus >= 201703L diff --git a/Minecraft.Client/Platform/Common/Leaderboards/base64.h b/Minecraft.Client/Platform/Common/Leaderboards/base64.h index 85f7e9935..052cea5a3 100644 --- a/Minecraft.Client/Platform/Common/Leaderboards/base64.h +++ b/Minecraft.Client/Platform/Common/Leaderboards/base64.h @@ -1,7 +1,35 @@ -#pragma once +// +// base64 encoding and decoding with C++. +// Version: 2.rc.09 (release candidate) +// + +#ifndef BASE64_H_C0CE2A47_D10E_42C9_A27C_C883944E704A +#define BASE64_H_C0CE2A47_D10E_42C9_A27C_C883944E704A #include -std::string base64_encode(std::string str); -std::string base64_encode(unsigned char const*, unsigned int len); -std::string base64_decode(std::string const& s); \ No newline at end of file +#if __cplusplus >= 201703L +#include +#endif // __cplusplus >= 201703L + +std::string base64_encode (std::string const& s, bool url = false); +std::string base64_encode_pem (std::string const& s); +std::string base64_encode_mime(std::string const& s); + +std::string base64_decode(std::string const& s, bool remove_linebreaks = false); +std::string base64_encode(unsigned char const*, size_t len, bool url = false); + +#if __cplusplus >= 201703L +// +// Interface with std::string_view rather than const std::string& +// Requires C++17 +// Provided by Yannic Bonenberger (https://github.com/Yannic) +// +std::string base64_encode (std::string_view s, bool url = false); +std::string base64_encode_pem (std::string_view s); +std::string base64_encode_mime(std::string_view s); + +std::string base64_decode(std::string_view s, bool remove_linebreaks = false); +#endif // __cplusplus >= 201703L + +#endif /* BASE64_H_C0CE2A47_D10E_42C9_A27C_C883944E704A */ \ No newline at end of file