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/*
** Copyright 2002, Double Precision Inc.
**
** See COPYING for distribution information.
*/
#include "libmail_config.h"
#include "base64.H"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
using namespace std;
// base64 decoding table.
static const unsigned char decode64tab[256]={
100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,
100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,
100,100,100,100,100,100,100,100,100,100,100,62,100,100,100,63,
52,53,54,55,56,57,58,59,60,61,100,100,100,99,100,100,
100,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,
15,16,17,18,19,20,21,22,23,24,25,100,100,100,100,100,
100,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,
41,42,43,44,45,46,47,48,49,50,51,100,100,100,100,100,
100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,
100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,
100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,
100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,
100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,
100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,
100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,
100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100};
mail::decodebase64::decodebase64()
{
decodeBuffer="";
}
mail::decodebase64::~decodebase64()
{
}
void mail::decodebase64::decode(string text)
{
char workbuf[BUFSIZ];
// Toss out the crud (newlines, spaces, etc..)
string::iterator b=text.begin(), e=text.end();
string::iterator c=b;
while (b != e)
{
if (decode64tab[(int)(unsigned char)*b] == 100)
{
// Ignore non-base64 characters.
b++;
continue;
}
*c++=*b++;
}
// Something might be left over from the previous run. Tis ok.
b=text.begin();
if (c != b)
decodeBuffer.append(b, c);
size_t i=decodeBuffer.length()/4; // The remainder gets left over.
char aa,bb,cc;
b=decodeBuffer.begin();
size_t k=0;
string decodedbuf="";
while (i)
{
unsigned char d=*b++;
unsigned char e=*b++;
unsigned char f=*b++;
unsigned char g=*b++;
int w=decode64tab[d];
int x=decode64tab[e];
int y=decode64tab[f];
int z=decode64tab[g];
aa= (w << 2) | (x >> 4);
bb= (x << 4) | (y >> 2);
cc= (y << 6) | z;
workbuf[k++]=aa;
if ( f != '=')
workbuf[k++]=bb;
if ( g != '=')
workbuf[k++]=cc;
if (k >= sizeof(workbuf)-10)
{
decodedbuf.append(workbuf, k);
k=0;
}
--i;
}
if (k > 0)
decodedbuf.append(workbuf, k);
string left="";
left.append(b, decodeBuffer.end());
decodeBuffer=left;
decoded(decodedbuf);
}
//
// The encoder does NOT insert newline breaks. That's the superclass's job.
mail::encodebase64::encodebase64()
{
libmail_encode_start(&encodeInfo, "base64", &callback_func, this);
}
mail::encodebase64::~encodebase64()
{
}
void mail::encodebase64::encode(string text)
{
libmail_encode(&encodeInfo, &text[0], text.size());
}
void mail::encodebase64::flush()
{
libmail_encode_end(&encodeInfo);
}
int mail::encodebase64::callback_func(const char *ptr, size_t len, void *vp)
{
string s=string(ptr, ptr+len);
size_t n;
while ((n=s.find('\n')) != std::string::npos)
s.erase(s.begin()+n);
((mail::encodebase64 *)vp)->encoded(s);
return 0;
}
/////////////////////////////////////////////////////////////////////////////
//
// The convenience classes.
mail::decodebase64str::decodebase64str()
: challengeStr("")
{
}
mail::decodebase64str::decodebase64str(string s)
: challengeStr("")
{
decode(s);
}
mail::decodebase64str::~decodebase64str()
{
}
void mail::decodebase64str::decoded(string s)
{
challengeStr += s;
}
mail::encodebase64str::encodebase64str() : responseStr("")
{
}
mail::encodebase64str::encodebase64str(string s)
: responseStr("")
{
encode(s);
flush();
}
mail::encodebase64str::~encodebase64str()
{
}
void mail::encodebase64str::encoded(string s)
{
responseStr += s;
}
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