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/** BEGIN COPYRIGHT BLOCK
* Copyright (C) 2001 Sun Microsystems, Inc. Used by permission.
* Copyright (C) 2005 Red Hat, Inc.
* All rights reserved.
* END COPYRIGHT BLOCK **/
#include <malloc.h>
#include <string.h>
#include <ldaputil/certmap.h>
#include <ldaputil/encode.h>
/* The magic set of 64 chars in the uuencoded data */
static unsigned char uuset[] = {
'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T',
'U','V','W','X','Y','Z','a','b','c','d','e','f','g','h','i','j','k','l','m','n',
'o','p','q','r','s','t','u','v','w','x','y','z','0','1','2','3','4','5','6','7',
'8','9','+','/' };
static int do_uuencode(unsigned char *src, unsigned char *dst, int srclen)
{
int i, r;
unsigned char *p;
/* To uuencode, we snip 8 bits from 3 bytes and store them as
6 bits in 4 bytes. 6*4 == 8*3 (get it?) and 6 bits per byte
yields nice clean bytes
It goes like this:
AAAAAAAA BBBBBBBB CCCCCCCC
turns into the standard set of uuencode ascii chars indexed by numbers:
00AAAAAA 00AABBBB 00BBBBCC 00CCCCCC
Snip-n-shift, snip-n-shift, etc....
*/
for (p=dst,i=0; i < srclen; i += 3) {
/* Do 3 bytes of src */
register char b0, b1, b2;
b0 = src[0];
if (i==srclen-1)
b1 = b2 = '\0';
else if (i==srclen-2) {
b1 = src[1];
b2 = '\0';
}
else {
b1 = src[1];
b2 = src[2];
}
*p++ = uuset[b0>>2];
*p++ = uuset[(((b0 & 0x03) << 4) | ((b1 & 0xf0) >> 4))];
*p++ = uuset[(((b1 & 0x0f) << 2) | ((b2 & 0xc0) >> 6))];
*p++ = uuset[b2 & 0x3f];
src += 3;
}
*p = 0; /* terminate the string */
r = (unsigned char *)p - (unsigned char *)dst;/* remember how many we did */
/* Always do 4-for-3, but if not round threesome, have to go
clean up the last extra bytes */
for( ; i != srclen; i--)
*--p = '=';
return r;
}
const unsigned char pr2six[256]={
64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,
64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,62,64,64,64,63,
52,53,54,55,56,57,58,59,60,61,64,64,64,64,64,64,64,0,1,2,3,4,5,6,7,8,9,
10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,64,64,64,64,64,64,26,27,
28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,
64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,
64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,
64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,
64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,
64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,
64,64,64,64,64,64,64,64,64,64,64,64,64
};
static char *_uudecode(const char *bufcoded)
{
register const char *bufin = bufcoded;
register unsigned char *bufout;
register int nprbytes;
unsigned char *bufplain;
int nbytesdecoded;
/* Find the length */
while(pr2six[(int)*(bufin++)] <= 63);
nprbytes = bufin - bufcoded - 1;
nbytesdecoded = ((nprbytes+3)/4) * 3;
bufout = (unsigned char *) malloc(nbytesdecoded + 1);
bufplain = bufout;
bufin = bufcoded;
while (nprbytes > 0) {
*(bufout++) = (unsigned char)
(pr2six[(int)(*bufin)] << 2 | pr2six[(int)bufin[1]] >> 4);
*(bufout++) = (unsigned char)
(pr2six[(int)bufin[1]] << 4 | pr2six[(int)bufin[2]] >> 2);
*(bufout++) = (unsigned char)
(pr2six[(int)bufin[2]] << 6 | pr2six[(int)bufin[3]]);
bufin += 4;
nprbytes -= 4;
}
if(nprbytes & 03) {
if(pr2six[(int)bufin[-2]] > 63)
nbytesdecoded -= 2;
else
nbytesdecoded -= 1;
}
bufplain[nbytesdecoded] = '\0';
return (char *)bufplain;
}
char *dbconf_encodeval (const char *val)
{
int len = strlen(val);
char *dst = (char *)malloc(2*len);
if (dst) {
do_uuencode((unsigned char *)val, (unsigned char *)dst, len);
}
return dst;
}
char *dbconf_decodeval (const char *val)
{
return _uudecode(val);
}
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