/* returns true iff "s" is a substring of a member of the list */
int
strListIsSubstr(const String * list, const char *s, char del)
{
assert(list && del);
return strStr(*list, s) != 0;
/*
* Note: the original code with a loop is broken because it uses strstr()
* instead of strnstr(). If 's' contains a 'del', strListIsSubstr() may
* return true when it should not. If 's' does not contain a 'del', the
* implementaion is equavalent to strstr()! Thus, we replace the loop with
* strstr() above until strnstr() is available.
*/
#ifdef BROKEN_CODE
const char *pos = NULL;
const char *item;
assert(list && s);
while (strListGetItem(list, del, &item, NULL, &pos)) {
if (strstr(item, s))
return 1;
}
return 0;
#endif
}
/* returns true if ranges are valid; inits HttpHdrRange */
int
httpHdrRangeParseInit(HttpHdrRange * range, const String * str)
{
const char *item;
const char *pos = NULL;
int ilen;
int count = 0;
assert(range && str);
RangeParsedCount++;
debug(64, 8) ("parsing range field: '%s'\n", strBuf(*str));
/* check range type */
if (strNCaseCmp(*str, "bytes=", 6))
return 0;
/* skip "bytes="; hack! */
pos = strBuf(*str) + 5;
/* iterate through comma separated list */
while (strListGetItem(str, ',', &item, &ilen, &pos)) {
HttpHdrRangeSpec *spec = httpHdrRangeSpecParseCreate(item, ilen);
/*
* HTTP/1.1 draft says we must ignore the whole header field if one spec
* is invalid. However, RFC 2068 just says that we must ignore that spec.
*/
if (spec)
stackPush(&range->specs, spec);
count++;
}
debug(64, 8) ("parsed range range count: %d\n", range->specs.count);
return range->specs.count;
}
/* returns true iff "m" is a member of the list */
int
strListIsMember(const String * list, const char *m, char del)
{
const char *pos = NULL;
const char *item;
int ilen = 0;
int mlen;
assert(list && m);
mlen = strlen(m);
while (strListGetItem(list, del, &item, &ilen, &pos)) {
if (mlen == ilen && !strncasecmp(item, m, ilen))
return 1;
}
return 0;
}
/*
* returns a pointer to a specified entry if any
* note that we return one entry so it does not make much sense to ask for
* "list" headers
*/
String
httpHeaderGetByNameListMember(const HttpHeader * hdr, const char *name, const char *member, const char separator)
{
String result = StringNull;
String header;
const char *pos = NULL;
const char *item;
int ilen;
int mlen = strlen(member);
assert(hdr);
assert(name);
header = httpHeaderGetByName(hdr, name);
while (strListGetItem(&header, separator, &item, &ilen, &pos)) {
if (strncmp(item, member, mlen) == 0 && item[mlen] == '=') {
stringAppend(&result, item + mlen + 1, ilen - mlen - 1);
break;
}
}
return result;
}
/*
* returns a the value of the specified list member, if any.
*/
String
httpHeaderGetListMember(const HttpHeader * hdr, http_hdr_type id, const char *member, const char separator)
{
String result = StringNull;
String header;
const char *pos = NULL;
const char *item;
int ilen;
int mlen = strlen(member);
assert(hdr);
assert_eid(id);
header = httpHeaderGetStrOrList(hdr, id);
while (strListGetItem(&header, separator, &item, &ilen, &pos)) {
if (strncmp(item, member, mlen) == 0 && item[mlen] == '=') {
stringAppend(&result, item + mlen + 1, ilen - mlen - 1);
break;
}
}
stringClean(&header);
return result;
}
static void
authenticateDigestDecodeAuth(auth_user_request_t * auth_user_request, const char *proxy_auth)
{
String temp;
const char *item;
const char *p;
const char *pos = NULL;
char *username = NULL;
digest_nonce_h *nonce;
int ilen;
digest_request_h *digest_request;
digest_user_h *digest_user;
auth_user_t *auth_user;
dlink_node *node;
debug(29, 9) ("authenticateDigestDecodeAuth: beginning\n");
assert(auth_user_request != NULL);
digest_request = authDigestRequestNew();
/* trim DIGEST from string */
while (xisgraph(*proxy_auth))
proxy_auth++;
/* Trim leading whitespace before decoding */
while (xisspace(*proxy_auth))
proxy_auth++;
stringInit(&temp, proxy_auth);
while (strListGetItem(&temp, ',', &item, &ilen, &pos)) {
if ((p = strchr(item, '=')) && (p - item < ilen))
ilen = p++ - item;
if (!strncmp(item, "username", ilen)) {
/* white space */
while (xisspace(*p))
p++;
/* quote mark */
p++;
username = xstrndup(p, strchr(p, '"') + 1 - p);
debug(29, 9) ("authDigestDecodeAuth: Found Username '%s'\n", username);
} else if (!strncmp(item, "realm", ilen)) {
/* white space */
while (xisspace(*p))
p++;
/* quote mark */
p++;
digest_request->realm = xstrndup(p, strchr(p, '"') + 1 - p);
debug(29, 9) ("authDigestDecodeAuth: Found realm '%s'\n", digest_request->realm);
} else if (!strncmp(item, "qop", ilen)) {
/* white space */
while (xisspace(*p))
p++;
if (*p == '\"')
/* quote mark */
p++;
digest_request->qop = xstrndup(p, strcspn(p, "\" \t\r\n()<>@,;:\\/[]?={}") + 1);
debug(29, 9) ("authDigestDecodeAuth: Found qop '%s'\n", digest_request->qop);
} else if (!strncmp(item, "algorithm", ilen)) {
/* white space */
while (xisspace(*p))
p++;
if (*p == '\"')
/* quote mark */
p++;
digest_request->algorithm = xstrndup(p, strcspn(p, "\" \t\r\n()<>@,;:\\/[]?={}") + 1);
debug(29, 9) ("authDigestDecodeAuth: Found algorithm '%s'\n", digest_request->algorithm);
} else if (!strncmp(item, "uri", ilen)) {
/* white space */
while (xisspace(*p))
p++;
/* quote mark */
p++;
digest_request->uri = xstrndup(p, strchr(p, '"') + 1 - p);
debug(29, 9) ("authDigestDecodeAuth: Found uri '%s'\n", digest_request->uri);
} else if (!strncmp(item, "nonce", ilen)) {
/* white space */
while (xisspace(*p))
p++;
/* quote mark */
p++;
digest_request->nonceb64 = xstrndup(p, strchr(p, '"') + 1 - p);
debug(29, 9) ("authDigestDecodeAuth: Found nonce '%s'\n", digest_request->nonceb64);
} else if (!strncmp(item, "nc", ilen)) {
/* white space */
while (xisspace(*p))
p++;
xstrncpy(digest_request->nc, p, 9);
debug(29, 9) ("authDigestDecodeAuth: Found noncecount '%s'\n", digest_request->nc);
} else if (!strncmp(item, "cnonce", ilen)) {
/* white space */
while (xisspace(*p))
p++;
/* quote mark */
p++;
digest_request->cnonce = xstrndup(p, strchr(p, '"') + 1 - p);
debug(29, 9) ("authDigestDecodeAuth: Found cnonce '%s'\n", digest_request->cnonce);
} else if (!strncmp(item, "response", ilen)) {
/* white space */
while (xisspace(*p))
p++;
/* quote mark */
p++;
digest_request->response = xstrndup(p, strchr(p, '"') + 1 - p);
debug(29, 9) ("authDigestDecodeAuth: Found response '%s'\n", digest_request->response);
}
}
stringClean(&temp);
/* now we validate the data given to us */
/*
* TODO: on invalid parameters we should return 400, not 407.
* Find some clean way of doing this. perhaps return a valid
* struct, and set the direction to clientwards combined with
* a change to the clientwards handling code (ie let the
* clientwards call set the error type (but limited to known
* correct values - 400/401/407
*/
/* first the NONCE count */
if (digest_request->cnonce && strlen(digest_request->nc) != 8) {
debug(29, 4) ("authenticateDigestDecode: nonce count length invalid\n");
authDigestLogUsername(auth_user_request, username);
/* we don't need the scheme specific data anymore */
authDigestRequestDelete(digest_request);
auth_user_request->scheme_data = NULL;
return;
}
/* now the nonce */
nonce = authenticateDigestNonceFindNonce(digest_request->nonceb64);
if (!nonce) {
/* we couldn't find a matching nonce! */
debug(29, 4) ("authenticateDigestDecode: Unexpected or invalid nonce recieved\n");
authDigestLogUsername(auth_user_request, username);
/* we don't need the scheme specific data anymore */
authDigestRequestDelete(digest_request);
auth_user_request->scheme_data = NULL;
return;
}
digest_request->nonce = nonce;
authDigestNonceLink(nonce);
/* check the qop is what we expected. Note that for compatability with
* RFC 2069 we should support a missing qop. Tough. */
if (!digest_request->qop || strcmp(digest_request->qop, QOP_AUTH)) {
/* we recieved a qop option we didn't send */
debug(29, 4) ("authenticateDigestDecode: Invalid qop option recieved\n");
authDigestLogUsername(auth_user_request, username);
/* we don't need the scheme specific data anymore */
authDigestRequestDelete(digest_request);
auth_user_request->scheme_data = NULL;
return;
}
/* we can't check the URI just yet. We'll check it in the
* authenticate phase */
/* is the response the correct length? */
if (!digest_request->response || strlen(digest_request->response) != 32) {
debug(29, 4) ("authenticateDigestDecode: Response length invalid\n");
authDigestLogUsername(auth_user_request, username);
/* we don't need the scheme specific data anymore */
authDigestRequestDelete(digest_request);
auth_user_request->scheme_data = NULL;
return;
}
/* do we have a username ? */
if (!username || username[0] == '\0') {
debug(29, 4) ("authenticateDigestDecode: Empty or not present username\n");
authDigestLogUsername(auth_user_request, username);
/* we don't need the scheme specific data anymore */
authDigestRequestDelete(digest_request);
auth_user_request->scheme_data = NULL;
return;
}
/* check that we're not being hacked / the username hasn't changed */
if (nonce->auth_user && strcmp(username, authenticateUserUsername(nonce->auth_user))) {
debug(29, 4) ("authenticateDigestDecode: Username for the nonce does not equal the username for the request\n");
authDigestLogUsername(auth_user_request, username);
/* we don't need the scheme specific data anymore */
authDigestRequestDelete(digest_request);
auth_user_request->scheme_data = NULL;
return;
}
/* if we got a qop, did we get a cnonce or did we get a cnonce wihtout a qop? */
if ((digest_request->qop && !digest_request->cnonce)
|| (!digest_request->qop && digest_request->cnonce)) {
debug(29, 4) ("authenticateDigestDecode: qop without cnonce, or vice versa!\n");
authDigestLogUsername(auth_user_request, username);
/* we don't need the scheme specific data anymore */
authDigestRequestDelete(digest_request);
auth_user_request->scheme_data = NULL;
return;
}
/* check the algorithm is present and supported */
if (!digest_request->algorithm)
digest_request->algorithm = xstrndup("MD5", 4);
else if (strcmp(digest_request->algorithm, "MD5")
&& strcmp(digest_request->algorithm, "MD5-sess")) {
debug(29, 4) ("authenticateDigestDecode: invalid algorithm specified!\n");
authDigestLogUsername(auth_user_request, username);
/* we don't need the scheme specific data anymore */
authDigestRequestDelete(digest_request);
auth_user_request->scheme_data = NULL;
return;
}
/* the method we'll check at the authenticate step as well */
/* we don't send or parse opaques. Ok so we're flexable ... */
/* find the user */
if ((auth_user = authDigestUserFindUsername(username)) == NULL) {
/* the user doesn't exist in the username cache yet */
debug(29, 9) ("authDigestDecodeAuth: Creating new digest user '%s'\n", username);
/* new auth_user */
auth_user = authenticateAuthUserNew("digest");
/* new scheme user data */
digest_user = authDigestUserNew();
/* save the username */
digest_user->username = username;
/* link the primary struct in */
auth_user->scheme_data = digest_user;
/* set the user type */
auth_user->auth_type = AUTH_DIGEST;
/* this auth_user struct is the one to get added to the
* username cache */
/* store user in hash's */
authenticateUserNameCacheAdd(auth_user);
/*
* Add the digest to the user so we can tell if a hacking
* or spoofing attack is taking place. We do this by assuming
* the user agent won't change user name without warning.
*/
authDigestUserLinkNonce(auth_user, nonce);
} else {
debug(29, 9) ("authDigestDecodeAuth: Found user '%s' in the user cache as '%p'\n", username, auth_user);
digest_user = auth_user->scheme_data;
xfree(username);
}
/*link the request and the user */
auth_user_request->auth_user = auth_user;
auth_user_request->scheme_data = digest_request;
/* lock for the request link */
authenticateAuthUserLock(auth_user);
node = dlinkNodeNew();
dlinkAdd(auth_user_request, node, &auth_user->requests);
debug(29, 9) ("username = '******'\nrealm = '%s'\nqop = '%s'\nalgorithm = '%s'\nuri = '%s'\nnonce = '%s'\nnc = '%s'\ncnonce = '%s'\nresponse = '%s'\ndigestnonce = '%p'\n",
digest_user->username, digest_request->realm,
digest_request->qop, digest_request->algorithm,
digest_request->uri, digest_request->nonceb64,
digest_request->nc, digest_request->cnonce, digest_request->response, nonce);
return;
}