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/*
Copyright (C) 2012-13 Miranda NG team (http://miranda-ng.org)
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation version 2
of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "commonheaders.h"
/////////////////////////////////////////////////////////////////////////////////////////
static const char szHexDigits[] = "0123456789ABCDEF";
MIR_CORE_DLL(char*) mir_urlEncode(const char *szUrl)
{
if (szUrl == NULL)
return NULL;
const BYTE *s;
int outputLen;
for (outputLen = 0, s = (const BYTE*)szUrl; *s; s++) {
if (('0' <= *s && *s <= '9') || //0-9
('A' <= *s && *s <= 'Z') || //ABC...XYZ
('a' <= *s && *s <= 'z') || //abc...xyz
*s == '-' || *s == '_' || *s == '.' || *s == ' ') outputLen++;
else outputLen += 3;
}
char *szOutput = (char*)mir_alloc(outputLen+1);
if (szOutput == NULL)
return NULL;
char *d = szOutput;
for (s = (const BYTE*)szUrl; *s; s++) {
if (('0' <= *s && *s <= '9') || //0-9
('A' <= *s && *s <= 'Z') || //ABC...XYZ
('a' <= *s && *s <= 'z') || //abc...xyz
*s == '-' || *s == '_' || *s == '.') *d++ = *s;
else if (*s == ' ') *d++='+';
else {
*d++ = '%';
*d++ = szHexDigits[*s >> 4];
*d++ = szHexDigits[*s & 0xF];
}
}
*d = '\0';
return szOutput;
}
/////////////////////////////////////////////////////////////////////////////////////////
static char cb64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
MIR_CORE_DLL(char*) mir_base64_encode(const BYTE *input, unsigned inputLen)
{
if (input == NULL)
return NULL;
unsigned outputLen = mir_base64_encode_bufsize(inputLen);
char *output = (char*)mir_alloc(outputLen);
if (output == NULL)
return NULL;
return mir_base64_encodebuf(input, inputLen, output, outputLen);
}
MIR_CORE_DLL(char*) mir_base64_encodebuf(const BYTE *input, unsigned inputLen, char *output, unsigned outputLen)
{
if (input == NULL)
return NULL;
if (outputLen < mir_base64_encode_bufsize(inputLen))
return NULL;
char *p = output;
for (unsigned i=0; i < inputLen; ) {
int rest = 0;
BYTE chr[3];
chr[0] = input[i++];
chr[1] = (i < inputLen) ? input[i++] : rest++, 0;
chr[2] = (i < inputLen) ? input[i++] : rest++, 0;
*p++ = cb64[ chr[0] >> 2 ];
*p++ = cb64[ ((chr[0] & 0x03) << 4) | (chr[1] >> 4) ];
int b2 = ((chr[1] & 0x0F) << 2) | (chr[2] >> 6),
b3 = chr[2] & 0x3F;
if (rest == 2) { *p++ = '='; *p++ = '='; }
else if (rest == 1) { *p++ = cb64[b2]; *p++ = '='; }
else { *p++ = cb64[b2]; *p++ = cb64[b3]; }
}
*p = 0;
return output;
}
/////////////////////////////////////////////////////////////////////////////////////////
static BYTE Base64DecodeTable[] =
{
-1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
-1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
-1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,62, -1,-1,-1,63,
52,53,54,55, 56,57,58,59, 60,61,-1,-1, -1,-1,-1,-1,
-1, 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,-1, -1,-1,-1,-1,
-1,26,27,28, 29,30,31,32, 33,34,35,36, 37,38,39,40,
41,42,43,44, 45,46,47,48, 49,50,51,-1, -1,-1,-1,-1,
-1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
-1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
-1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
-1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
-1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
-1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
-1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
-1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1
};
MIR_CORE_DLL(void*) mir_base64_decode(const char *input, unsigned *outputLen)
{
if (input == NULL)
return NULL;
size_t length = strlen(input);
size_t nLength = (length / 4) * 3;
const char *stop = input + length;
char *output = (char *)mir_alloc(nLength+1);
char *p = output;
while (input < stop) {
BYTE e0 = Base64DecodeTable[*input++];
BYTE e1 = Base64DecodeTable[*input++];
BYTE e2 = Base64DecodeTable[*input++];
BYTE e3 = Base64DecodeTable[*input++];
if (e0 == (BYTE)-1 || e1 == (BYTE)-1)
break;
*p++ = (e0 << 2) | (e1 >> 4);
if (e2 != (BYTE)-1)
*p++ = ((e1 & 15) << 4) | (e2 >> 2);
if (e3 != (BYTE)-1)
*p++ = ((e2 & 3) << 6) | e3;
}
*p = 0;
if (outputLen != NULL)
*outputLen = p - output;
return output;
}
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