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curl/lib/ldap.c
Alex Rousskov cb4e2be7c6 proxy: Support HTTPS proxy and SOCKS+HTTP(s) 
* HTTPS proxies:

An HTTPS proxy receives all transactions over an SSL/TLS connection.
Once a secure connection with the proxy is established, the user agent
uses the proxy as usual, including sending CONNECT requests to instruct
the proxy to establish a [usually secure] TCP tunnel with an origin
server. HTTPS proxies protect nearly all aspects of user-proxy
communications as opposed to HTTP proxies that receive all requests
(including CONNECT requests) in vulnerable clear text.

With HTTPS proxies, it is possible to have two concurrent _nested_
SSL/TLS sessions: the "outer" one between the user agent and the proxy
and the "inner" one between the user agent and the origin server
(through the proxy). This change adds supports for such nested sessions
as well.

A secure connection with a proxy requires its own set of the usual SSL
options (their actual descriptions differ and need polishing, see TODO):

  --proxy-cacert FILE        CA certificate to verify peer against
  --proxy-capath DIR         CA directory to verify peer against
  --proxy-cert CERT[:PASSWD] Client certificate file and password
  --proxy-cert-type TYPE     Certificate file type (DER/PEM/ENG)
  --proxy-ciphers LIST       SSL ciphers to use
  --proxy-crlfile FILE       Get a CRL list in PEM format from the file
  --proxy-insecure           Allow connections to proxies with bad certs
  --proxy-key KEY            Private key file name
  --proxy-key-type TYPE      Private key file type (DER/PEM/ENG)
  --proxy-pass PASS          Pass phrase for the private key
  --proxy-ssl-allow-beast    Allow security flaw to improve interop
  --proxy-sslv2              Use SSLv2
  --proxy-sslv3              Use SSLv3
  --proxy-tlsv1              Use TLSv1
  --proxy-tlsuser USER       TLS username
  --proxy-tlspassword STRING TLS password
  --proxy-tlsauthtype STRING TLS authentication type (default SRP)

All --proxy-foo options are independent from their --foo counterparts,
except --proxy-crlfile which defaults to --crlfile and --proxy-capath
which defaults to --capath.

Curl now also supports %{proxy_ssl_verify_result} --write-out variable,
similar to the existing %{ssl_verify_result} variable.

Supported backends: OpenSSL, GnuTLS, and NSS.

* A SOCKS proxy + HTTP/HTTPS proxy combination:

If both --socks* and --proxy options are given, Curl first connects to
the SOCKS proxy and then connects (through SOCKS) to the HTTP or HTTPS
proxy.

TODO: Update documentation for the new APIs and --proxy-* options.
Look for "Added in 7.XXX" marks.
2016-11-24 23:41:44 +01:00

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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
#include "curl_setup.h"
#if !defined(CURL_DISABLE_LDAP) && !defined(USE_OPENLDAP)
/*
* Notice that USE_OPENLDAP is only a source code selection switch. When
* libcurl is built with USE_OPENLDAP defined the libcurl source code that
* gets compiled is the code from openldap.c, otherwise the code that gets
* compiled is the code from ldap.c.
*
* When USE_OPENLDAP is defined a recent version of the OpenLDAP library
* might be required for compilation and runtime. In order to use ancient
* OpenLDAP library versions, USE_OPENLDAP shall not be defined.
*/
#ifdef USE_WIN32_LDAP /* Use Windows LDAP implementation. */
# include <winldap.h>
# ifndef LDAP_VENDOR_NAME
# error Your Platform SDK is NOT sufficient for LDAP support! \
Update your Platform SDK, or disable LDAP support!
# else
# include <winber.h>
# endif
#else
# define LDAP_DEPRECATED 1 /* Be sure ldap_init() is defined. */
# ifdef HAVE_LBER_H
# include <lber.h>
# endif
# include <ldap.h>
# if (defined(HAVE_LDAP_SSL) && defined(HAVE_LDAP_SSL_H))
# include <ldap_ssl.h>
# endif /* HAVE_LDAP_SSL && HAVE_LDAP_SSL_H */
#endif
/* These are macros in both <wincrypt.h> (in above <winldap.h>) and typedefs
* in BoringSSL's <openssl/x509.h>
*/
#ifdef HAVE_BORINGSSL
# undef X509_NAME
# undef X509_CERT_PAIR
# undef X509_EXTENSIONS
#endif
#include "urldata.h"
#include <curl/curl.h>
#include "sendf.h"
#include "escape.h"
#include "progress.h"
#include "transfer.h"
#include "strcase.h"
#include "strtok.h"
#include "curl_ldap.h"
#include "curl_multibyte.h"
#include "curl_base64.h"
#include "connect.h"
/* The last 3 #include files should be in this order */
#include "curl_printf.h"
#include "curl_memory.h"
#include "memdebug.h"
#ifndef HAVE_LDAP_URL_PARSE
/* Use our own implementation. */
typedef struct {
char *lud_host;
int lud_port;
#if defined(USE_WIN32_LDAP)
TCHAR *lud_dn;
TCHAR **lud_attrs;
#else
char *lud_dn;
char **lud_attrs;
#endif
int lud_scope;
#if defined(USE_WIN32_LDAP)
TCHAR *lud_filter;
#else
char *lud_filter;
#endif
char **lud_exts;
size_t lud_attrs_dups; /* how many were dup'ed, this field is not in the
"real" struct so can only be used in code
without HAVE_LDAP_URL_PARSE defined */
} CURL_LDAPURLDesc;
#undef LDAPURLDesc
#define LDAPURLDesc CURL_LDAPURLDesc
static int _ldap_url_parse (const struct connectdata *conn,
LDAPURLDesc **ludp);
static void _ldap_free_urldesc (LDAPURLDesc *ludp);
#undef ldap_free_urldesc
#define ldap_free_urldesc _ldap_free_urldesc
#endif
#ifdef DEBUG_LDAP
#define LDAP_TRACE(x) do { \
_ldap_trace ("%u: ", __LINE__); \
_ldap_trace x; \
} WHILE_FALSE
static void _ldap_trace (const char *fmt, ...);
#else
#define LDAP_TRACE(x) Curl_nop_stmt
#endif
static CURLcode Curl_ldap(struct connectdata *conn, bool *done);
/*
* LDAP protocol handler.
*/
const struct Curl_handler Curl_handler_ldap = {
"LDAP", /* scheme */
ZERO_NULL, /* setup_connection */
Curl_ldap, /* do_it */
ZERO_NULL, /* done */
ZERO_NULL, /* do_more */
ZERO_NULL, /* connect_it */
ZERO_NULL, /* connecting */
ZERO_NULL, /* doing */
ZERO_NULL, /* proto_getsock */
ZERO_NULL, /* doing_getsock */
ZERO_NULL, /* domore_getsock */
ZERO_NULL, /* perform_getsock */
ZERO_NULL, /* disconnect */
ZERO_NULL, /* readwrite */
PORT_LDAP, /* defport */
CURLPROTO_LDAP, /* protocol */
PROTOPT_NONE /* flags */
};
#ifdef HAVE_LDAP_SSL
/*
* LDAPS protocol handler.
*/
const struct Curl_handler Curl_handler_ldaps = {
"LDAPS", /* scheme */
ZERO_NULL, /* setup_connection */
Curl_ldap, /* do_it */
ZERO_NULL, /* done */
ZERO_NULL, /* do_more */
ZERO_NULL, /* connect_it */
ZERO_NULL, /* connecting */
ZERO_NULL, /* doing */
ZERO_NULL, /* proto_getsock */
ZERO_NULL, /* doing_getsock */
ZERO_NULL, /* domore_getsock */
ZERO_NULL, /* perform_getsock */
ZERO_NULL, /* disconnect */
ZERO_NULL, /* readwrite */
PORT_LDAPS, /* defport */
CURLPROTO_LDAPS, /* protocol */
PROTOPT_SSL /* flags */
};
#endif
static CURLcode Curl_ldap(struct connectdata *conn, bool *done)
{
CURLcode result = CURLE_OK;
int rc = 0;
LDAP *server = NULL;
LDAPURLDesc *ludp = NULL;
LDAPMessage *ldapmsg = NULL;
LDAPMessage *entryIterator;
int num = 0;
struct Curl_easy *data=conn->data;
int ldap_proto = LDAP_VERSION3;
int ldap_ssl = 0;
char *val_b64 = NULL;
size_t val_b64_sz = 0;
curl_off_t dlsize = 0;
#ifdef LDAP_OPT_NETWORK_TIMEOUT
struct timeval ldap_timeout = {10, 0}; /* 10 sec connection/search timeout */
#endif
#if defined(USE_WIN32_LDAP)
TCHAR *host = NULL;
TCHAR *user = NULL;
TCHAR *passwd = NULL;
#else
char *host = NULL;
char *user = NULL;
char *passwd = NULL;
#endif
*done = TRUE; /* unconditionally */
infof(data, "LDAP local: LDAP Vendor = %s ; LDAP Version = %d\n",
LDAP_VENDOR_NAME, LDAP_VENDOR_VERSION);
infof(data, "LDAP local: %s\n", data->change.url);
#ifdef HAVE_LDAP_URL_PARSE
rc = ldap_url_parse(data->change.url, &ludp);
#else
rc = _ldap_url_parse(conn, &ludp);
#endif
if(rc != 0) {
failf(data, "LDAP local: %s", ldap_err2string(rc));
result = CURLE_LDAP_INVALID_URL;
goto quit;
}
/* Get the URL scheme (either ldap or ldaps) */
if(conn->given->flags & PROTOPT_SSL)
ldap_ssl = 1;
infof(data, "LDAP local: trying to establish %s connection\n",
ldap_ssl ? "encrypted" : "cleartext");
#if defined(USE_WIN32_LDAP)
host = Curl_convert_UTF8_to_tchar(conn->host.name);
if(!host) {
result = CURLE_OUT_OF_MEMORY;
goto quit;
}
if(conn->bits.user_passwd) {
user = Curl_convert_UTF8_to_tchar(conn->user);
passwd = Curl_convert_UTF8_to_tchar(conn->passwd);
if(!user || !passwd) {
result = CURLE_OUT_OF_MEMORY;
goto quit;
}
}
#else
host = conn->host.name;
if(conn->bits.user_passwd) {
user = conn->user;
passwd = conn->passwd;
}
#endif
#ifdef LDAP_OPT_NETWORK_TIMEOUT
ldap_set_option(NULL, LDAP_OPT_NETWORK_TIMEOUT, &ldap_timeout);
#endif
ldap_set_option(NULL, LDAP_OPT_PROTOCOL_VERSION, &ldap_proto);
if(ldap_ssl) {
#ifdef HAVE_LDAP_SSL
#ifdef USE_WIN32_LDAP
/* Win32 LDAP SDK doesn't support insecure mode without CA! */
server = ldap_sslinit(host, (int)conn->port, 1);
ldap_set_option(server, LDAP_OPT_SSL, LDAP_OPT_ON);
#else
int ldap_option;
char* ldap_ca = conn->ssl_config.CAfile;
#if defined(CURL_HAS_NOVELL_LDAPSDK)
rc = ldapssl_client_init(NULL, NULL);
if(rc != LDAP_SUCCESS) {
failf(data, "LDAP local: ldapssl_client_init %s", ldap_err2string(rc));
result = CURLE_SSL_CERTPROBLEM;
goto quit;
}
if(conn->ssl_config.verifypeer) {
/* Novell SDK supports DER or BASE64 files. */
int cert_type = LDAPSSL_CERT_FILETYPE_B64;
if((data->set.ssl.cert_type) &&
(strcasecompare(data->set.ssl.cert_type, "DER")))
cert_type = LDAPSSL_CERT_FILETYPE_DER;
if(!ldap_ca) {
failf(data, "LDAP local: ERROR %s CA cert not set!",
(cert_type == LDAPSSL_CERT_FILETYPE_DER ? "DER" : "PEM"));
result = CURLE_SSL_CERTPROBLEM;
goto quit;
}
infof(data, "LDAP local: using %s CA cert '%s'\n",
(cert_type == LDAPSSL_CERT_FILETYPE_DER ? "DER" : "PEM"),
ldap_ca);
rc = ldapssl_add_trusted_cert(ldap_ca, cert_type);
if(rc != LDAP_SUCCESS) {
failf(data, "LDAP local: ERROR setting %s CA cert: %s",
(cert_type == LDAPSSL_CERT_FILETYPE_DER ? "DER" : "PEM"),
ldap_err2string(rc));
result = CURLE_SSL_CERTPROBLEM;
goto quit;
}
ldap_option = LDAPSSL_VERIFY_SERVER;
}
else
ldap_option = LDAPSSL_VERIFY_NONE;
rc = ldapssl_set_verify_mode(ldap_option);
if(rc != LDAP_SUCCESS) {
failf(data, "LDAP local: ERROR setting cert verify mode: %s",
ldap_err2string(rc));
result = CURLE_SSL_CERTPROBLEM;
goto quit;
}
server = ldapssl_init(host, (int)conn->port, 1);
if(server == NULL) {
failf(data, "LDAP local: Cannot connect to %s:%ld",
conn->host.dispname, conn->port);
result = CURLE_COULDNT_CONNECT;
goto quit;
}
#elif defined(LDAP_OPT_X_TLS)
if(conn->ssl_config.verifypeer) {
/* OpenLDAP SDK supports BASE64 files. */
if((data->set.ssl.cert_type) &&
(!strcasecompare(data->set.ssl.cert_type, "PEM"))) {
failf(data, "LDAP local: ERROR OpenLDAP only supports PEM cert-type!");
result = CURLE_SSL_CERTPROBLEM;
goto quit;
}
if(!ldap_ca) {
failf(data, "LDAP local: ERROR PEM CA cert not set!");
result = CURLE_SSL_CERTPROBLEM;
goto quit;
}
infof(data, "LDAP local: using PEM CA cert: %s\n", ldap_ca);
rc = ldap_set_option(NULL, LDAP_OPT_X_TLS_CACERTFILE, ldap_ca);
if(rc != LDAP_SUCCESS) {
failf(data, "LDAP local: ERROR setting PEM CA cert: %s",
ldap_err2string(rc));
result = CURLE_SSL_CERTPROBLEM;
goto quit;
}
ldap_option = LDAP_OPT_X_TLS_DEMAND;
}
else
ldap_option = LDAP_OPT_X_TLS_NEVER;
rc = ldap_set_option(NULL, LDAP_OPT_X_TLS_REQUIRE_CERT, &ldap_option);
if(rc != LDAP_SUCCESS) {
failf(data, "LDAP local: ERROR setting cert verify mode: %s",
ldap_err2string(rc));
result = CURLE_SSL_CERTPROBLEM;
goto quit;
}
server = ldap_init(host, (int)conn->port);
if(server == NULL) {
failf(data, "LDAP local: Cannot connect to %s:%ld",
conn->host.dispname, conn->port);
result = CURLE_COULDNT_CONNECT;
goto quit;
}
ldap_option = LDAP_OPT_X_TLS_HARD;
rc = ldap_set_option(server, LDAP_OPT_X_TLS, &ldap_option);
if(rc != LDAP_SUCCESS) {
failf(data, "LDAP local: ERROR setting SSL/TLS mode: %s",
ldap_err2string(rc));
result = CURLE_SSL_CERTPROBLEM;
goto quit;
}
/*
rc = ldap_start_tls_s(server, NULL, NULL);
if(rc != LDAP_SUCCESS) {
failf(data, "LDAP local: ERROR starting SSL/TLS mode: %s",
ldap_err2string(rc));
result = CURLE_SSL_CERTPROBLEM;
goto quit;
}
*/
#else
/* we should probably never come up to here since configure
should check in first place if we can support LDAP SSL/TLS */
failf(data, "LDAP local: SSL/TLS not supported with this version "
"of the OpenLDAP toolkit\n");
result = CURLE_SSL_CERTPROBLEM;
goto quit;
#endif
#endif
#endif /* CURL_LDAP_USE_SSL */
}
else {
server = ldap_init(host, (int)conn->port);
if(server == NULL) {
failf(data, "LDAP local: Cannot connect to %s:%ld",
conn->host.dispname, conn->port);
result = CURLE_COULDNT_CONNECT;
goto quit;
}
}
#ifdef USE_WIN32_LDAP
ldap_set_option(server, LDAP_OPT_PROTOCOL_VERSION, &ldap_proto);
#endif
rc = ldap_simple_bind_s(server, user, passwd);
if(!ldap_ssl && rc != 0) {
ldap_proto = LDAP_VERSION2;
ldap_set_option(server, LDAP_OPT_PROTOCOL_VERSION, &ldap_proto);
rc = ldap_simple_bind_s(server, user, passwd);
}
if(rc != 0) {
failf(data, "LDAP local: ldap_simple_bind_s %s", ldap_err2string(rc));
result = CURLE_LDAP_CANNOT_BIND;
goto quit;
}
rc = ldap_search_s(server, ludp->lud_dn, ludp->lud_scope,
ludp->lud_filter, ludp->lud_attrs, 0, &ldapmsg);
if(rc != 0 && rc != LDAP_SIZELIMIT_EXCEEDED) {
failf(data, "LDAP remote: %s", ldap_err2string(rc));
result = CURLE_LDAP_SEARCH_FAILED;
goto quit;
}
for(num = 0, entryIterator = ldap_first_entry(server, ldapmsg);
entryIterator;
entryIterator = ldap_next_entry(server, entryIterator), num++) {
BerElement *ber = NULL;
#if defined(USE_WIN32_LDAP)
TCHAR *attribute;
#else
char *attribute; /*! suspicious that this isn't 'const' */
#endif
int i;
/* Get the DN and write it to the client */
{
char *name;
size_t name_len;
#if defined(USE_WIN32_LDAP)
TCHAR *dn = ldap_get_dn(server, entryIterator);
name = Curl_convert_tchar_to_UTF8(dn);
if(!name) {
ldap_memfree(dn);
result = CURLE_OUT_OF_MEMORY;
goto quit;
}
#else
char *dn = name = ldap_get_dn(server, entryIterator);
#endif
name_len = strlen(name);
result = Curl_client_write(conn, CLIENTWRITE_BODY, (char *)"DN: ", 4);
if(result) {
#if defined(USE_WIN32_LDAP)
Curl_unicodefree(name);
#endif
ldap_memfree(dn);
goto quit;
}
result = Curl_client_write(conn, CLIENTWRITE_BODY, (char *) name,
name_len);
if(result) {
#if defined(USE_WIN32_LDAP)
Curl_unicodefree(name);
#endif
ldap_memfree(dn);
goto quit;
}
result = Curl_client_write(conn, CLIENTWRITE_BODY, (char *)"\n", 1);
if(result) {
#if defined(USE_WIN32_LDAP)
Curl_unicodefree(name);
#endif
ldap_memfree(dn);
goto quit;
}
dlsize += name_len + 5;
#if defined(USE_WIN32_LDAP)
Curl_unicodefree(name);
#endif
ldap_memfree(dn);
}
/* Get the attributes and write them to the client */
for(attribute = ldap_first_attribute(server, entryIterator, &ber);
attribute;
attribute = ldap_next_attribute(server, entryIterator, ber)) {
BerValue **vals;
size_t attr_len;
#if defined(USE_WIN32_LDAP)
char *attr = Curl_convert_tchar_to_UTF8(attribute);
if(!attr) {
if(ber)
ber_free(ber, 0);
result = CURLE_OUT_OF_MEMORY;
goto quit;
}
#else
char *attr = attribute;
#endif
attr_len = strlen(attr);
vals = ldap_get_values_len(server, entryIterator, attribute);
if(vals != NULL) {
for(i = 0; (vals[i] != NULL); i++) {
result = Curl_client_write(conn, CLIENTWRITE_BODY, (char *)"\t", 1);
if(result) {
ldap_value_free_len(vals);
#if defined(USE_WIN32_LDAP)
Curl_unicodefree(attr);
#endif
ldap_memfree(attribute);
if(ber)
ber_free(ber, 0);
goto quit;
}
result = Curl_client_write(conn, CLIENTWRITE_BODY,
(char *) attr, attr_len);
if(result) {
ldap_value_free_len(vals);
#if defined(USE_WIN32_LDAP)
Curl_unicodefree(attr);
#endif
ldap_memfree(attribute);
if(ber)
ber_free(ber, 0);
goto quit;
}
result = Curl_client_write(conn, CLIENTWRITE_BODY, (char *)": ", 2);
if(result) {
ldap_value_free_len(vals);
#if defined(USE_WIN32_LDAP)
Curl_unicodefree(attr);
#endif
ldap_memfree(attribute);
if(ber)
ber_free(ber, 0);
goto quit;
}
dlsize += attr_len + 3;
if((attr_len > 7) &&
(strcmp(";binary", (char *) attr + (attr_len - 7)) == 0)) {
/* Binary attribute, encode to base64. */
result = Curl_base64_encode(data,
vals[i]->bv_val,
vals[i]->bv_len,
&val_b64,
&val_b64_sz);
if(result) {
ldap_value_free_len(vals);
#if defined(USE_WIN32_LDAP)
Curl_unicodefree(attr);
#endif
ldap_memfree(attribute);
if(ber)
ber_free(ber, 0);
goto quit;
}
if(val_b64_sz > 0) {
result = Curl_client_write(conn, CLIENTWRITE_BODY, val_b64,
val_b64_sz);
free(val_b64);
if(result) {
ldap_value_free_len(vals);
#if defined(USE_WIN32_LDAP)
Curl_unicodefree(attr);
#endif
ldap_memfree(attribute);
if(ber)
ber_free(ber, 0);
goto quit;
}
dlsize += val_b64_sz;
}
}
else {
result = Curl_client_write(conn, CLIENTWRITE_BODY, vals[i]->bv_val,
vals[i]->bv_len);
if(result) {
ldap_value_free_len(vals);
#if defined(USE_WIN32_LDAP)
Curl_unicodefree(attr);
#endif
ldap_memfree(attribute);
if(ber)
ber_free(ber, 0);
goto quit;
}
dlsize += vals[i]->bv_len;
}
result = Curl_client_write(conn, CLIENTWRITE_BODY, (char *)"\n", 1);
if(result) {
ldap_value_free_len(vals);
#if defined(USE_WIN32_LDAP)
Curl_unicodefree(attr);
#endif
ldap_memfree(attribute);
if(ber)
ber_free(ber, 0);
goto quit;
}
dlsize++;
}
/* Free memory used to store values */
ldap_value_free_len(vals);
}
/* Free the attribute as we are done with it */
#if defined(USE_WIN32_LDAP)
Curl_unicodefree(attr);
#endif
ldap_memfree(attribute);
result = Curl_client_write(conn, CLIENTWRITE_BODY, (char *)"\n", 1);
if(result)
goto quit;
dlsize++;
Curl_pgrsSetDownloadCounter(data, dlsize);
}
if(ber)
ber_free(ber, 0);
}
quit:
if(ldapmsg) {
ldap_msgfree(ldapmsg);
LDAP_TRACE (("Received %d entries\n", num));
}
if(rc == LDAP_SIZELIMIT_EXCEEDED)
infof(data, "There are more than %d entries\n", num);
if(ludp)
ldap_free_urldesc(ludp);
if(server)
ldap_unbind_s(server);
#if defined(HAVE_LDAP_SSL) && defined(CURL_HAS_NOVELL_LDAPSDK)
if(ldap_ssl)
ldapssl_client_deinit();
#endif /* HAVE_LDAP_SSL && CURL_HAS_NOVELL_LDAPSDK */
#if defined(USE_WIN32_LDAP)
Curl_unicodefree(passwd);
Curl_unicodefree(user);
Curl_unicodefree(host);
#endif
/* no data to transfer */
Curl_setup_transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
connclose(conn, "LDAP connection always disable re-use");
return result;
}
#ifdef DEBUG_LDAP
static void _ldap_trace (const char *fmt, ...)
{
static int do_trace = -1;
va_list args;
if(do_trace == -1) {
const char *env = getenv("CURL_TRACE");
do_trace = (env && strtol(env, NULL, 10) > 0);
}
if(!do_trace)
return;
va_start (args, fmt);
vfprintf (stderr, fmt, args);
va_end (args);
}
#endif
#ifndef HAVE_LDAP_URL_PARSE
/*
* Return scope-value for a scope-string.
*/
static int str2scope (const char *p)
{
if(strcasecompare(p, "one"))
return LDAP_SCOPE_ONELEVEL;
if(strcasecompare(p, "onetree"))
return LDAP_SCOPE_ONELEVEL;
if(strcasecompare(p, "base"))
return LDAP_SCOPE_BASE;
if(strcasecompare(p, "sub"))
return LDAP_SCOPE_SUBTREE;
if(strcasecompare(p, "subtree"))
return LDAP_SCOPE_SUBTREE;
return (-1);
}
/*
* Split 'str' into strings separated by commas.
* Note: out[] points into 'str'.
*/
static bool split_str(char *str, char ***out, size_t *count)
{
char **res;
char *lasts;
char *s;
size_t i;
size_t items = 1;
s = strchr(str, ',');
while(s) {
items++;
s = strchr(++s, ',');
}
res = calloc(items, sizeof(char *));
if(!res)
return FALSE;
for(i = 0, s = strtok_r(str, ",", &lasts); s && i < items;
s = strtok_r(NULL, ",", &lasts), i++)
res[i] = s;
*out = res;
*count = items;
return TRUE;
}
/*
* Break apart the pieces of an LDAP URL.
* Syntax:
* ldap://<hostname>:<port>/<base_dn>?<attributes>?<scope>?<filter>?<ext>
*
* <hostname> already known from 'conn->host.name'.
* <port> already known from 'conn->remote_port'.
* extract the rest from 'conn->data->state.path+1'. All fields are optional.
* e.g.
* ldap://<hostname>:<port>/?<attributes>?<scope>?<filter>
* yields ludp->lud_dn = "".
*
* Defined in RFC4516 section 2.
*/
static int _ldap_url_parse2(const struct connectdata *conn, LDAPURLDesc *ludp)
{
int rc = LDAP_SUCCESS;
char *path;
char *p;
char *q;
size_t i;
if(!conn->data ||
!conn->data->state.path ||
conn->data->state.path[0] != '/' ||
!checkprefix("LDAP", conn->data->change.url))
return LDAP_INVALID_SYNTAX;
ludp->lud_scope = LDAP_SCOPE_BASE;
ludp->lud_port = conn->remote_port;
ludp->lud_host = conn->host.name;
/* Duplicate the path */
p = path = strdup(conn->data->state.path + 1);
if(!path)
return LDAP_NO_MEMORY;
/* Parse the DN (Distinguished Name) */
q = strchr(p, '?');
if(q)
*q++ = '\0';
if(*p) {
char *dn = p;
char *unescaped;
CURLcode result;
LDAP_TRACE (("DN '%s'\n", dn));
/* Unescape the DN */
result = Curl_urldecode(conn->data, dn, 0, &unescaped, NULL, FALSE);
if(result) {
rc = LDAP_NO_MEMORY;
goto quit;
}
#if defined(USE_WIN32_LDAP)
/* Convert the unescaped string to a tchar */
ludp->lud_dn = Curl_convert_UTF8_to_tchar(unescaped);
/* Free the unescaped string as we are done with it */
Curl_unicodefree(unescaped);
if(!ludp->lud_dn) {
rc = LDAP_NO_MEMORY;
goto quit;
}
#else
ludp->lud_dn = unescaped;
#endif
}
p = q;
if(!p)
goto quit;
/* Parse the attributes. skip "??" */
q = strchr(p, '?');
if(q)
*q++ = '\0';
if(*p) {
char **attributes;
size_t count = 0;
/* Split the string into an array of attributes */
if(!split_str(p, &attributes, &count)) {
rc = LDAP_NO_MEMORY;
goto quit;
}
/* Allocate our array (+1 for the NULL entry) */
#if defined(USE_WIN32_LDAP)
ludp->lud_attrs = calloc(count + 1, sizeof(TCHAR *));
#else
ludp->lud_attrs = calloc(count + 1, sizeof(char *));
#endif
if(!ludp->lud_attrs) {
free(attributes);
rc = LDAP_NO_MEMORY;
goto quit;
}
for(i = 0; i < count; i++) {
char *unescaped;
CURLcode result;
LDAP_TRACE (("attr[%d] '%s'\n", i, attributes[i]));
/* Unescape the attribute */
result = Curl_urldecode(conn->data, attributes[i], 0, &unescaped, NULL,
FALSE);
if(result) {
free(attributes);
rc = LDAP_NO_MEMORY;
goto quit;
}
#if defined(USE_WIN32_LDAP)
/* Convert the unescaped string to a tchar */
ludp->lud_attrs[i] = Curl_convert_UTF8_to_tchar(unescaped);
/* Free the unescaped string as we are done with it */
Curl_unicodefree(unescaped);
if(!ludp->lud_attrs[i]) {
free(attributes);
rc = LDAP_NO_MEMORY;
goto quit;
}
#else
ludp->lud_attrs[i] = unescaped;
#endif
ludp->lud_attrs_dups++;
}
free(attributes);
}
p = q;
if(!p)
goto quit;
/* Parse the scope. skip "??" */
q = strchr(p, '?');
if(q)
*q++ = '\0';
if(*p) {
ludp->lud_scope = str2scope(p);
if(ludp->lud_scope == -1) {
rc = LDAP_INVALID_SYNTAX;
goto quit;
}
LDAP_TRACE (("scope %d\n", ludp->lud_scope));
}
p = q;
if(!p)
goto quit;
/* Parse the filter */
q = strchr(p, '?');
if(q)
*q++ = '\0';
if(*p) {
char *filter = p;
char *unescaped;
CURLcode result;
LDAP_TRACE (("filter '%s'\n", filter));
/* Unescape the filter */
result = Curl_urldecode(conn->data, filter, 0, &unescaped, NULL, FALSE);
if(result) {
rc = LDAP_NO_MEMORY;
goto quit;
}
#if defined(USE_WIN32_LDAP)
/* Convert the unescaped string to a tchar */
ludp->lud_filter = Curl_convert_UTF8_to_tchar(unescaped);
/* Free the unescaped string as we are done with it */
Curl_unicodefree(unescaped);
if(!ludp->lud_filter) {
rc = LDAP_NO_MEMORY;
goto quit;
}
#else
ludp->lud_filter = unescaped;
#endif
}
p = q;
if(p && !*p) {
rc = LDAP_INVALID_SYNTAX;
goto quit;
}
quit:
free(path);
return rc;
}
static int _ldap_url_parse(const struct connectdata *conn,
LDAPURLDesc **ludpp)
{
LDAPURLDesc *ludp = calloc(1, sizeof(*ludp));
int rc;
*ludpp = NULL;
if(!ludp)
return LDAP_NO_MEMORY;
rc = _ldap_url_parse2(conn, ludp);
if(rc != LDAP_SUCCESS) {
_ldap_free_urldesc(ludp);
ludp = NULL;
}
*ludpp = ludp;
return (rc);
}
static void _ldap_free_urldesc(LDAPURLDesc *ludp)
{
size_t i;
if(!ludp)
return;
free(ludp->lud_dn);
free(ludp->lud_filter);
if(ludp->lud_attrs) {
for(i = 0; i < ludp->lud_attrs_dups; i++)
free(ludp->lud_attrs[i]);
free(ludp->lud_attrs);
}
free (ludp);
}
#endif /* !HAVE_LDAP_URL_PARSE */
#endif /* !CURL_DISABLE_LDAP && !USE_OPENLDAP */
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