Gav Wood
10 years ago
7 changed files with 224 additions and 76 deletions
@ -0,0 +1,128 @@ |
|||||
|
/*
|
||||
|
base64.cpp and base64.h |
||||
|
|
||||
|
Copyright (C) 2004-2008 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 |
||||
|
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. |
||||
|
|
||||
|
René Nyffenegger rene.nyffenegger@adp-gmbh.ch |
||||
|
*/ |
||||
|
/// code found on http://stackoverflow.com/questions/180947/base64-decode-snippet-in-c
|
||||
|
/// originally by René Nyffenegger, modified by some other guy and then again by Gav Wood.
|
||||
|
|
||||
|
#include "base64.h" |
||||
|
|
||||
|
#include <iostream> |
||||
|
|
||||
|
using namespace std; |
||||
|
using namespace dev; |
||||
|
|
||||
|
static const std::string base64_chars = |
||||
|
"ABCDEFGHIJKLMNOPQRSTUVWXYZ" |
||||
|
"abcdefghijklmnopqrstuvwxyz" |
||||
|
"0123456789+/"; |
||||
|
|
||||
|
static inline bool is_base64(byte c) { |
||||
|
return (isalnum(c) || (c == '+') || (c == '/')); |
||||
|
} |
||||
|
|
||||
|
std::string dev::base64_encode(bytesConstRef _in) { |
||||
|
std::string ret; |
||||
|
int i = 0; |
||||
|
int j = 0; |
||||
|
byte char_array_3[3]; |
||||
|
byte char_array_4[4]; |
||||
|
|
||||
|
auto buf = _in.data(); |
||||
|
auto bufLen = _in.size(); |
||||
|
|
||||
|
while (bufLen--) { |
||||
|
char_array_3[i++] = *(buf++); |
||||
|
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(i = 0; (i <4) ; i++) |
||||
|
ret += base64_chars[char_array_4[i]]; |
||||
|
i = 0; |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
if (i) |
||||
|
{ |
||||
|
for(j = i; j < 3; j++) |
||||
|
char_array_3[j] = '\0'; |
||||
|
|
||||
|
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 (j = 0; (j < i + 1); j++) |
||||
|
ret += base64_chars[char_array_4[j]]; |
||||
|
|
||||
|
while((i++ < 3)) |
||||
|
ret += '='; |
||||
|
} |
||||
|
|
||||
|
return ret; |
||||
|
} |
||||
|
|
||||
|
bytes dev::base64_decode(std::string const& encoded_string) { |
||||
|
int in_len = encoded_string.size(); |
||||
|
int i = 0; |
||||
|
int j = 0; |
||||
|
int in_ = 0; |
||||
|
byte char_array_4[4], char_array_3[3]; |
||||
|
bytes ret; |
||||
|
|
||||
|
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]); |
||||
|
|
||||
|
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]; |
||||
|
|
||||
|
for (i = 0; (i < 3); i++) |
||||
|
ret.push_back(char_array_3[i]); |
||||
|
i = 0; |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
if (i) { |
||||
|
for (j = i; j <4; j++) |
||||
|
char_array_4[j] = 0; |
||||
|
|
||||
|
for (j = 0; j <4; j++) |
||||
|
char_array_4[j] = base64_chars.find(char_array_4[j]); |
||||
|
|
||||
|
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]; |
||||
|
|
||||
|
for (j = 0; (j < i - 1); j++) ret.push_back(char_array_3[j]); |
||||
|
} |
||||
|
|
||||
|
return ret; |
||||
|
} |
@ -0,0 +1,40 @@ |
|||||
|
/*
|
||||
|
base64.cpp and base64.h |
||||
|
|
||||
|
Copyright (C) 2004-2008 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 |
||||
|
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. |
||||
|
|
||||
|
René Nyffenegger rene.nyffenegger@adp-gmbh.ch |
||||
|
*/ |
||||
|
/// code found on http://stackoverflow.com/questions/180947/base64-decode-snippet-in-c
|
||||
|
/// originally by René Nyffenegger, modified by some other guy and then again by Gav Wood.
|
||||
|
#pragma once |
||||
|
|
||||
|
#include <vector> |
||||
|
#include <string> |
||||
|
#include <libdevcore/Common.h> |
||||
|
|
||||
|
namespace dev |
||||
|
{ |
||||
|
|
||||
|
std::string base64_encode(bytesConstRef _in); |
||||
|
bytes base64_decode(std::string const& _in); |
||||
|
|
||||
|
} |
Loading…
Reference in new issue