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/* auth.c
* user password authorization for web access
* (c) 2002 Mikulas Patocka
* This file is part of the Links project, released under GPL.
*
* Modified by Karl Dahlke for integration with edbrowse.
*/
#include "eb.h"
#define REALM_BASIC 1
#define REALM_MD5 2
static const char *const realmDesc[] = {
"", "Basic ", "Digest "
};
struct httpAuth {
struct httpAuth *next;
struct httpAuth *prev;
char user[MAXUSERPASS];
char password[MAXUSERPASS];
/* These strings are allocated. */
char *host;
char *directory;
char *user_password_encoded;
int port;
bool proxy;
uchar realm;
};
static struct listHead authlist = { &authlist, &authlist };
/* This string is included in the outgoing http header.
* It could include both a proxy and a host authorization.
* Not that I understand any of the proxy stuff. */
char *
getAuthString(const char *url)
{
const char *host = getHostURL(url);
int port = getPortURL(url);
const char *dir, *dirend;
struct httpAuth *a;
char *r = NULL;
int l, d1len, d2len;
if(isProxyURL(url)) {
foreach(a, authlist) {
if(a->proxy && stringEqualCI(a->host, host) && a->port == port) {
r = initString(&l);
stringAndString(&r, &l, "Proxy-Authorization: ");
stringAndString(&r, &l, realmDesc[a->realm]);
stringAndString(&r, &l, a->user_password_encoded);
stringAndString(&r, &l, eol);
}
}
/* Skip past the proxy directive */
url = getDataURL(url);
host = getHostURL(url);
port = getPortURL(url);
}
/* proxy */
getDirURL(url, &dir, &dirend);
d2len = dirend - dir;
foreach(a, authlist) {
if(!a->proxy && stringEqualCI(a->host, host) && a->port == port) {
d1len = strlen(a->directory);
if(d1len > d2len)
continue;
if(memcmp(a->directory, dir, d1len))
continue;
if(!r)
r = initString(&l);
stringAndString(&r, &l, "Authorization: ");
stringAndString(&r, &l, realmDesc[a->realm]);
stringAndString(&r, &l, a->user_password_encoded);
stringAndString(&r, &l, eol);
}
}
return r;
} /* getAuthString */
bool
addWebAuthorization(const char *url,
int realm, const char *user, const char *password, bool proxy)
{
struct httpAuth *a;
const char *host;
const char *dir = 0, *dirend;
int port, dl;
bool urlProx = isProxyURL(url);
bool updated = true;
char *p;
if(proxy) {
if(!urlProx) {
setError(MSG_ProxyAuth);
return false;
}
} else if(urlProx)
url = getDataURL(url);
host = getHostURL(url);
port = getPortURL(url);
if(!proxy) {
getDirURL(url, &dir, &dirend);
dl = dirend - dir;
}
/* See if we've done this one before. */
foreach(a, authlist) {
if(a->proxy == proxy &&
a->port == port &&
a->realm == realm &&
stringEqualCI(a->host, host) &&
(proxy ||
dl == strlen(a->directory) && !memcmp(a->directory, dir, dl))) {
nzFree(a->user_password_encoded);
break;
}
}
if(a == (struct httpAuth *)&authlist) {
updated = false;
a = allocZeroMem(sizeof (struct httpAuth));
addToListFront(&authlist, a);
}
a->proxy = proxy;
a->realm = realm;
a->port = port;
if(!a->host)
a->host = cloneString(host);
strcpy(a->user, user);
strcpy(a->password, password);
if(dir && !a->directory)
a->directory = pullString1(dir, dirend);
/* Now compute the user password encoded */
p = allocMem(strlen(user) + strlen(password) + 2);
strcpy(p, user);
strcat(p, ":");
strcat(p, password);
a->user_password_encoded = base64Encode(p, strlen(p), false);
free(p);
debugPrint(3, "%s authorization for %s%s",
updated ? "updated" : "new", a->host, a->directory);
} /* addWebAuthorization */
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