Gav Wood
10 years ago
7 changed files with 224 additions and 76 deletions
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/*
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base64.cpp and base64.h |
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Copyright (C) 2004-2008 René Nyffenegger |
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This source code is provided 'as-is', without any express or implied |
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warranty. In no event will the author be held liable for any damages |
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arising from the use of this software. |
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|
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Permission is granted to anyone to use this software for any purpose, |
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including commercial applications, and to alter it and redistribute it |
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freely, subject to the following restrictions: |
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|
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1. The origin of this source code must not be misrepresented; you must not |
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claim that you wrote the original source code. If you use this source code |
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in a product, an acknowledgment in the product documentation would be |
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appreciated but is not required. |
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|
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2. Altered source versions must be plainly marked as such, and must not be |
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misrepresented as being the original source code. |
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|
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3. This notice may not be removed or altered from any source distribution. |
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|
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René Nyffenegger rene.nyffenegger@adp-gmbh.ch |
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*/ |
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/// code found on http://stackoverflow.com/questions/180947/base64-decode-snippet-in-c
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/// originally by René Nyffenegger, modified by some other guy and then again by Gav Wood.
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#include "base64.h" |
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#include <iostream> |
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using namespace std; |
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using namespace dev; |
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static const std::string base64_chars = |
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"ABCDEFGHIJKLMNOPQRSTUVWXYZ" |
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"abcdefghijklmnopqrstuvwxyz" |
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"0123456789+/"; |
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static inline bool is_base64(byte c) { |
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return (isalnum(c) || (c == '+') || (c == '/')); |
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} |
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std::string dev::base64_encode(bytesConstRef _in) { |
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std::string ret; |
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int i = 0; |
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int j = 0; |
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byte char_array_3[3]; |
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byte char_array_4[4]; |
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auto buf = _in.data(); |
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auto bufLen = _in.size(); |
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while (bufLen--) { |
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char_array_3[i++] = *(buf++); |
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if (i == 3) { |
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char_array_4[0] = (char_array_3[0] & 0xfc) >> 2; |
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char_array_4[1] = ((char_array_3[0] & 0x03) << 4) + ((char_array_3[1] & 0xf0) >> 4); |
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char_array_4[2] = ((char_array_3[1] & 0x0f) << 2) + ((char_array_3[2] & 0xc0) >> 6); |
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char_array_4[3] = char_array_3[2] & 0x3f; |
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for(i = 0; (i <4) ; i++) |
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ret += base64_chars[char_array_4[i]]; |
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i = 0; |
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} |
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} |
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if (i) |
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{ |
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for(j = i; j < 3; j++) |
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char_array_3[j] = '\0'; |
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char_array_4[0] = (char_array_3[0] & 0xfc) >> 2; |
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char_array_4[1] = ((char_array_3[0] & 0x03) << 4) + ((char_array_3[1] & 0xf0) >> 4); |
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char_array_4[2] = ((char_array_3[1] & 0x0f) << 2) + ((char_array_3[2] & 0xc0) >> 6); |
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char_array_4[3] = char_array_3[2] & 0x3f; |
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for (j = 0; (j < i + 1); j++) |
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ret += base64_chars[char_array_4[j]]; |
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while((i++ < 3)) |
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ret += '='; |
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} |
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return ret; |
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} |
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bytes dev::base64_decode(std::string const& encoded_string) { |
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int in_len = encoded_string.size(); |
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int i = 0; |
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int j = 0; |
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int in_ = 0; |
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byte char_array_4[4], char_array_3[3]; |
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bytes ret; |
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while (in_len-- && ( encoded_string[in_] != '=') && is_base64(encoded_string[in_])) { |
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char_array_4[i++] = encoded_string[in_]; in_++; |
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if (i ==4) { |
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for (i = 0; i <4; i++) |
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char_array_4[i] = base64_chars.find(char_array_4[i]); |
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char_array_3[0] = (char_array_4[0] << 2) + ((char_array_4[1] & 0x30) >> 4); |
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char_array_3[1] = ((char_array_4[1] & 0xf) << 4) + ((char_array_4[2] & 0x3c) >> 2); |
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char_array_3[2] = ((char_array_4[2] & 0x3) << 6) + char_array_4[3]; |
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for (i = 0; (i < 3); i++) |
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ret.push_back(char_array_3[i]); |
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i = 0; |
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} |
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} |
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if (i) { |
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for (j = i; j <4; j++) |
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char_array_4[j] = 0; |
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for (j = 0; j <4; j++) |
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char_array_4[j] = base64_chars.find(char_array_4[j]); |
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char_array_3[0] = (char_array_4[0] << 2) + ((char_array_4[1] & 0x30) >> 4); |
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char_array_3[1] = ((char_array_4[1] & 0xf) << 4) + ((char_array_4[2] & 0x3c) >> 2); |
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char_array_3[2] = ((char_array_4[2] & 0x3) << 6) + char_array_4[3]; |
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for (j = 0; (j < i - 1); j++) ret.push_back(char_array_3[j]); |
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} |
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return ret; |
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} |
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@ -0,0 +1,40 @@ |
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/*
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base64.cpp and base64.h |
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|
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Copyright (C) 2004-2008 René Nyffenegger |
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|
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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. |
|||
|
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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: |
|||
|
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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. |
|||
|
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2. Altered source versions must be plainly marked as such, and must not be |
|||
misrepresented as being the original source code. |
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|
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3. This notice may not be removed or altered from any source distribution. |
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|
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René Nyffenegger rene.nyffenegger@adp-gmbh.ch |
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*/ |
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/// code found on http://stackoverflow.com/questions/180947/base64-decode-snippet-in-c
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/// originally by René Nyffenegger, modified by some other guy and then again by Gav Wood.
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#pragma once |
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#include <vector> |
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#include <string> |
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#include <libdevcore/Common.h> |
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namespace dev |
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{ |
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std::string base64_encode(bytesConstRef _in); |
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bytes base64_decode(std::string const& _in); |
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} |
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