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JWT header impl

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This commit is contained in:
Arun M 2017-11-01 17:04:09 +05:30
parent 063a0af131
commit 3e867d77f1
13 changed files with 358 additions and 20 deletions
include/jwt
base64.hpp

40
include/jwt/base64.hpp
View file

@ -36,41 +36,41 @@ std::string base64_encode(const char* in, size_t len)
std::string result;
result.resize(128);
constexpr static const EMap bmap{};
constexpr static const EMap emap{};
int i = 0;
int j = 0;
for (; i < len - 2; i += 3) {
auto first = in[i];
auto second = in[i+1];
auto third = in[i+2];
auto& first = in[i];
auto& second = in[i+1];
auto& third = in[i+2];
result[i] = bmap.at( (first >> 2) & 0x3F );
result[i + 1] = bmap.at(((first & 0x03) << 4) | ((second & 0xF0) >> 4));
result[i + 2] = bmap.at(((second & 0x0F) << 2) | ((third & 0xC0) >> 6));
result[i + 3] = bmap.at( (third & 0x3F) );
result[j++] = emap.at( (first >> 2) & 0x3F );
result[j++] = emap.at(((first & 0x03) << 4) | ((second & 0xF0) >> 4));
result[j++] = emap.at(((second & 0x0F) << 2) | ((third & 0xC0) >> 6));
result[j++] = emap.at( (third & 0x3F) );
}
switch (len % 3) {
case 2:
{
auto first = in[i];
auto second = in[i+1];
auto& first = in[i];
auto& second = in[i+1];
result[i] = bmap.at( (first >> 2) & 0x3F );
result[i + 1] = bmap.at(((first & 0x03) << 4) | ((second & 0xF0) >> 4));
result[i + 2] = bmap.at( (second & 0x0F) << 2 );
result[i + 3] = '=';
result[j++] = emap.at( (first >> 2) & 0x3F );
result[j++] = emap.at(((first & 0x03) << 4) | ((second & 0xF0) >> 4));
result[j++] = emap.at( (second & 0x0F) << 2 );
result[j++] = '=';
break;
}
case 1:
{
auto& first = in[i];
result[i] = bmap.at((first >> 2) & 0x3F );
result[i + 1] = bmap.at((first & 0x03) << 4 );
result[i + 2] = '=';
result[i + 3] = '=';
result[j++] = emap.at((first >> 2) & 0x3F);
result[j++] = emap.at((first & 0x03) << 4);
result[j++] = '=';
result[j++] = '=';
break;
}
case 0:
@ -135,7 +135,7 @@ std::string base64_decode(const char* in, size_t len)
while (bytes_rem > 4)
{
// Error case in input
if (dmap.at(*in) == -1) return;
if (dmap.at(*in) == -1) return result;
auto first = dmap.at(in[0]);
auto second = dmap.at(in[1]);