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Base64.h
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Base64.h
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#ifndef BASE64_H
#define BASE64_H
#include <vector>
#include <string>
namespace Base64
{
std::string base64_encode(const std::string &);
const std::string &SALT1 = "PK::AS::CD";
const std::string &SALT2 = "_:/_66";
const std::string &SALT3 = "mom-iknow-c++";
std::string EncryptBase64(std::string s)
{
s = SALT1 + s + SALT2 + SALT3;
s = base64_encode(s);
s.insert(7, SALT3);
s += SALT1;
s = base64_encode(s);
s = SALT2 + s + SALT3 + SALT1;
s = base64_encode(s);
s.insert(1, "Q");
s.insert(7, "W");
return s;
}
const std::string &BASE64_CODES = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
std::string base64_encode(const std::string &s)
{
std::string ret;
int val = 0;
int bits = -6;
const unsigned int b63 = 0x3F;
for(const auto &c : s)
{
val = (val << 8) + c;
bits += 8;
while(bits >= 0)
{
ret.push_back(BASE64_CODES[(val >> bits) & b63]);
bits -= 6;
}
}
if(bits > -6)
ret.push_back(BASE64_CODES[((val << 8) >> (bits + 8)) & b63]);
while(ret.size()%4)
ret.push_back('=');
return ret;
}
}
#endif // BASE64_H