60 lines
1.2 KiB
C
60 lines
1.2 KiB
C
|
/* Author: PaulCodeman
|
||
|
|
Example:
|
||
|
|
char bufferb64[0x1000] = {0};
|
||
|
|
base64_encode("Kevin van Zonneveld",#bufferb64, 19);
|
||
|
|
#bufferb64 == "S2V2aW4gdmFuIFpvbm5ldmVsZA=="
|
||
|
|
*/
|
||
|
|
|
||
|
|
:dword b64_symbols = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
|
||
|
|
inline void base64_encode(dword data, buffer, length)
|
||
|
|
{
|
||
|
|
byte o1 = 0;
|
||
|
|
byte o2 = 0;
|
||
|
|
byte o3 = 0;
|
||
|
|
dword bits = 0;
|
||
|
|
dword h1 = 0;
|
||
|
|
dword h2 = 0;
|
||
|
|
dword h3 = 0;
|
||
|
|
dword h4 = 0;
|
||
|
|
|
||
|
|
dword end = 0;
|
||
|
|
end = data+length;
|
||
|
|
|
||
|
|
do
|
||
|
|
{
|
||
|
|
o1 = DSBYTE[data];data++;
|
||
|
|
if (data < end) {o2 = DSBYTE[data];data++;} else o2 = 0;
|
||
|
|
if (data < end) {o3 = DSBYTE[data];data++;} else o3 = 0;
|
||
|
|
|
||
|
|
bits = o1<<16;
|
||
|
|
bits |= o2<<8;
|
||
|
|
bits |= o3;
|
||
|
|
|
||
|
|
h1 = bits>>18 & 0x3f;
|
||
|
|
h2 = bits>>12 & 0x3f;
|
||
|
|
h3 = bits>>6 & 0x3f;
|
||
|
|
h4 = bits & 0x3f;
|
||
|
|
|
||
|
|
DSBYTE[buffer] = DSBYTE[#b64_symbols+h1];buffer++;
|
||
|
|
DSBYTE[buffer] = DSBYTE[#b64_symbols+h2];buffer++;
|
||
|
|
DSBYTE[buffer] = DSBYTE[#b64_symbols+h3];buffer++;
|
||
|
|
DSBYTE[buffer] = DSBYTE[#b64_symbols+h4];buffer++;
|
||
|
|
} while(end > data);
|
||
|
|
switch(length % 3)
|
||
|
|
{
|
||
|
|
case 1:
|
||
|
|
buffer--;
|
||
|
|
DSBYTE[buffer] = '=';
|
||
|
|
buffer--;
|
||
|
|
DSBYTE[buffer] = '=';
|
||
|
|
buffer+=2;
|
||
|
|
break;
|
||
|
|
case 2:
|
||
|
|
buffer--;
|
||
|
|
DSBYTE[buffer] = '=';
|
||
|
|
buffer++;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
DSBYTE[buffer] = 0;
|
||
|
|
}
|