mirror of
https://github.com/3proxy/3proxy.git
synced 2025-02-23 18:45:40 +08:00
104 lines
2.8 KiB
C
104 lines
2.8 KiB
C
/*
|
|
(c) 2002-2016 by Vladimir Dubrovin <3proxy@3proxy.ru>
|
|
|
|
please read License Agreement
|
|
|
|
*/
|
|
|
|
#include <string.h>
|
|
|
|
static const unsigned char base64digits[] =
|
|
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
|
|
|
|
#define BAD 255
|
|
static const unsigned char base64val[] = {
|
|
BAD,BAD,BAD,BAD, BAD,BAD,BAD,BAD, BAD,BAD,BAD,BAD, BAD,BAD,BAD,BAD,
|
|
BAD,BAD,BAD,BAD, BAD,BAD,BAD,BAD, BAD,BAD,BAD,BAD, BAD,BAD,BAD,BAD,
|
|
BAD,BAD,BAD,BAD, BAD,BAD,BAD,BAD, BAD,BAD,BAD, 62, BAD,BAD,BAD, 63,
|
|
52, 53, 54, 55, 56, 57, 58, 59, 60, 61,BAD,BAD, BAD,BAD,BAD,BAD,
|
|
BAD, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
|
|
15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25,BAD, BAD,BAD,BAD,BAD,
|
|
BAD, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
|
|
41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51,BAD, BAD,BAD,BAD,BAD
|
|
};
|
|
#define DECODE64(c) ((c > 32 && c<127)? base64val[(int)c] : BAD)
|
|
|
|
unsigned char* en64 (const unsigned char *in, unsigned char *out, int inlen)
|
|
{
|
|
for (; inlen > 0; inlen -= 3, in+=3)
|
|
{
|
|
|
|
*out++ = base64digits[in[0] >> 2];
|
|
*out++ = base64digits[((in[0]&3)<<4) | ((inlen > 1)?(in[1]>>4):0)];
|
|
*out++ = (inlen > 1)? base64digits[((in[1] << 2) & 0x3c) | ((inlen > 2)? (in[2] >> 6) : 0)]: '=';
|
|
*out++ = (inlen > 2)? base64digits[in[2] & 0x3f] : '=';
|
|
}
|
|
*out = '\0';
|
|
return out;
|
|
}
|
|
|
|
int de64 (const char *in, char *out, int maxlen)
|
|
{
|
|
int len = 0;
|
|
register unsigned char digit1, digit2, digit3, digit4;
|
|
|
|
if (in[0] == '+' && in[1] == ' ')
|
|
in += 2;
|
|
if (*in == '\r')
|
|
return(0);
|
|
|
|
do {
|
|
digit1 = in[0];
|
|
if (DECODE64(digit1) == BAD)
|
|
return(-1);
|
|
digit2 = in[1];
|
|
if (DECODE64(digit2) == BAD)
|
|
return(-1);
|
|
digit3 = in[2];
|
|
if (digit3 != '=' && DECODE64(digit3) == BAD)
|
|
return(-1);
|
|
digit4 = in[3];
|
|
if (digit4 != '=' && DECODE64(digit4) == BAD)
|
|
return(-1);
|
|
in += 4;
|
|
*out++ = (DECODE64(digit1) << 2) | (DECODE64(digit2) >> 4);
|
|
++len;
|
|
if (digit3 != '=')
|
|
{
|
|
*out++ = ((DECODE64(digit2) << 4) & 0xf0) | (DECODE64(digit3) >> 2);
|
|
++len;
|
|
if (digit4 != '=')
|
|
{
|
|
*out++ = ((DECODE64(digit3) << 6) & 0xc0) | DECODE64(digit4);
|
|
++len;
|
|
}
|
|
}
|
|
} while
|
|
(*in && *in != '\r' && digit4 != '=' && (maxlen-=4) >= 4);
|
|
|
|
return (len);
|
|
}
|
|
|
|
unsigned char hex[] = "0123456789ABCDEF";
|
|
|
|
void tohex(unsigned char *in, unsigned char *out, int len){
|
|
int i;
|
|
|
|
for (i=0; i<len; i++) {
|
|
out[(i<<1)] = hex[(in[i]>>4)];
|
|
out[(i<<1) + 1] = hex[(in[i]&0x0F)];
|
|
}
|
|
out[(i<<1)] = 0;
|
|
}
|
|
|
|
void fromhex(unsigned char *in, unsigned char *out, int len){
|
|
char *c1, *c2;
|
|
for (; len > 0; len--) {
|
|
c1 = strchr((char *)hex, *in++);
|
|
c2 = strchr((char *)hex, *in++);
|
|
if(c1 && c2){
|
|
*out++ = ((unsigned char)((unsigned char *)c1 - hex) << 4) + (unsigned char)((unsigned char *)c2 - hex);
|
|
}
|
|
}
|
|
}
|