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rob rob@31f1291d-b8d6-0310-a050-a5561fc1590b
e6ed7b9eb5
git-svn-id: svn://svn.anope.org/anope/trunk@395 31f1291d-b8d6-0310-a050-a5561fc1590b git-svn-id: http://anope.svn.sourceforge.net/svnroot/anope/trunk@260 5417fbe8-f217-4b02-8779-1006273d7864
126 lines
3.2 KiB
C
126 lines
3.2 KiB
C
/* base64 routines.
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*
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* (C) 2003 Anope Team
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* Contact us at info@anope.org
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*
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* Please read COPYING and README for further details.
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*
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* Based on the original code of Epona by Lara.
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* Based on the original code of Services by Andy Church.
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*
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*
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*/
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/*
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This is borrowed from Unreal
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*/
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#include "services.h"
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static char *int_to_base64(long);
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static long base64_to_int(char *);
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char *base64enc(long i)
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{
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if (i < 0)
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return ("0");
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return int_to_base64(i);
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}
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long base64dec(char *b64)
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{
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if (b64)
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return base64_to_int(b64);
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else
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return 0;
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}
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/* ':' and '#' and '&' and '+' and '@' must never be in this table. */
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/* these tables must NEVER CHANGE! >) */
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char int6_to_base64_map[] = {
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'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D',
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'E', 'F',
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'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T',
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'U', 'V',
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'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j',
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'k', 'l',
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'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
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'{', '}'
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};
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char base64_to_int6_map[] = {
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9, -1, -1, -1, -1, -1, -1,
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-1, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24,
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25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, -1, -1, -1, -1, -1,
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-1, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50,
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51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, -1, 63, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
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};
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static char *int_to_base64(long val)
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{
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/* 32/6 == max 6 bytes for representation,
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* +1 for the null, +1 for byte boundaries
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*/
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static char base64buf[8];
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long i = 7;
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base64buf[i] = '\0';
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/* Temporary debugging code.. remove before 2038 ;p.
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* This might happen in case of 64bit longs (opteron/ia64),
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* if the value is then too large it can easily lead to
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* a buffer underflow and thus to a crash. -- Syzop
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*/
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if (val > 2147483647L) {
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abort();
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}
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do {
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base64buf[--i] = int6_to_base64_map[val & 63];
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}
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while (val >>= 6);
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return base64buf + i;
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}
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static long base64_to_int(char *b64)
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{
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int v = base64_to_int6_map[(u_char) * b64++];
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if (!b64)
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return 0;
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while (*b64) {
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v <<= 6;
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v += base64_to_int6_map[(u_char) * b64++];
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}
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return v;
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}
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long base64dects(char *ts)
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{
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char *token;
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if (!ts) {
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return 0;
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}
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token = myStrGetToken(ts, '!', 1);
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if (!token) {
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return strtoul(ts, NULL, 10);;
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}
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return base64dec(token);
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}
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