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curl/lib/http_ntlm.c
Kamil Dudka f3b77e5611 http_ntlm: add support for NSS 
When configured with '--without-ssl --with-nss', NTLM authentication
now uses NSS crypto library for MD5 and DES.  For MD4 we have a local
implementation in that case.  More details are available at
https://bugzilla.redhat.com/603783

In order to get it working, curl_global_init() must be called with
CURL_GLOBAL_SSL or CURL_GLOBAL_ALL.  That's necessary because NSS needs
to be initialized globally and we do so only when the NSS library is
actually required by protocol.  The mentioned call of curl_global_init()
is responsible for creating of the initialization mutex.

There was also slightly changed the NSS initialization scenario, in
particular, loading of the NSS PEM module.  It used to be loaded always
right after the NSS library was initialized.  Now the library is
initialized as soon as any SSL or NTLM is required, while the PEM module
is prevented from being loaded until the SSL is actually required.
2010-06-30 13:12:25 +02:00

1305 lines
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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2009, 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 http://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 "setup.h"
/* NTLM details:
http://davenport.sourceforge.net/ntlm.html
http://www.innovation.ch/java/ntlm.html
Another implementation:
http://lxr.mozilla.org/mozilla/source/security/manager/ssl/src/nsNTLMAuthModule.cpp
*/
#ifndef CURL_DISABLE_HTTP
#ifdef USE_NTLM
#define DEBUG_ME 0
/* -- WIN32 approved -- */
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <stdlib.h>
#include <ctype.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#if (defined(NETWARE) && !defined(__NOVELL_LIBC__))
#include <netdb.h>
#endif
#include "urldata.h"
#include "easyif.h" /* for Curl_convert_... prototypes */
#include "sendf.h"
#include "rawstr.h"
#include "curl_base64.h"
#include "http_ntlm.h"
#include "url.h"
#include "curl_memory.h"
#define _MPRINTF_REPLACE /* use our functions only */
#include <curl/mprintf.h>
/* "NTLMSSP" signature is always in ASCII regardless of the platform */
#define NTLMSSP_SIGNATURE "\x4e\x54\x4c\x4d\x53\x53\x50"
#ifdef USE_SSLEAY
#include "ssluse.h"
# ifdef USE_OPENSSL
# include <openssl/des.h>
# ifndef OPENSSL_NO_MD4
# include <openssl/md4.h>
# endif
# include <openssl/md5.h>
# include <openssl/ssl.h>
# include <openssl/rand.h>
# else
# include <des.h>
# ifndef OPENSSL_NO_MD4
# include <md4.h>
# endif
# include <md5.h>
# include <ssl.h>
# include <rand.h>
# endif
#if OPENSSL_VERSION_NUMBER < 0x00907001L
#define DES_key_schedule des_key_schedule
#define DES_cblock des_cblock
#define DES_set_odd_parity des_set_odd_parity
#define DES_set_key des_set_key
#define DES_ecb_encrypt des_ecb_encrypt
/* This is how things were done in the old days */
#define DESKEY(x) x
#define DESKEYARG(x) x
#else
/* Modern version */
#define DESKEYARG(x) *x
#define DESKEY(x) &x
#endif
#ifdef OPENSSL_NO_MD4
/* This requires MD4, but OpenSSL was compiled without it */
#define USE_NTRESPONSES 0
#define USE_NTLM2SESSION 0
#endif
#elif defined(USE_GNUTLS)
#include "gtls.h"
#include <gcrypt.h>
#define MD5_DIGEST_LENGTH 16
#define MD4_DIGEST_LENGTH 16
#elif defined(USE_NSS)
#include "curl_md4.h"
#include "nssg.h"
#include <nss.h>
#include <pk11pub.h>
#include <hasht.h>
#define MD5_DIGEST_LENGTH MD5_LENGTH
#elif defined(USE_WINDOWS_SSPI)
#include "curl_sspi.h"
#else
# error "Can't compile NTLM support without a crypto library."
#endif
/* The last #include file should be: */
#include "memdebug.h"
#ifndef USE_NTRESPONSES
/* Define this to make the type-3 message include the NT response message */
#define USE_NTRESPONSES 1
/* Define this to make the type-3 message include the NTLM2Session response
message, requires USE_NTRESPONSES. */
#define USE_NTLM2SESSION 1
#endif
#ifndef USE_WINDOWS_SSPI
/* this function converts from the little endian format used in the incoming
package to whatever endian format we're using natively */
static unsigned int readint_le(unsigned char *buf) /* must point to a
4 bytes buffer*/
{
return ((unsigned int)buf[0]) | ((unsigned int)buf[1] << 8) |
((unsigned int)buf[2] << 16) | ((unsigned int)buf[3] << 24);
}
#endif
#if DEBUG_ME
# define DEBUG_OUT(x) x
static void print_flags(FILE *handle, unsigned long flags)
{
if(flags & NTLMFLAG_NEGOTIATE_UNICODE)
fprintf(handle, "NTLMFLAG_NEGOTIATE_UNICODE ");
if(flags & NTLMFLAG_NEGOTIATE_OEM)
fprintf(handle, "NTLMFLAG_NEGOTIATE_OEM ");
if(flags & NTLMFLAG_REQUEST_TARGET)
fprintf(handle, "NTLMFLAG_REQUEST_TARGET ");
if(flags & (1<<3))
fprintf(handle, "NTLMFLAG_UNKNOWN_3 ");
if(flags & NTLMFLAG_NEGOTIATE_SIGN)
fprintf(handle, "NTLMFLAG_NEGOTIATE_SIGN ");
if(flags & NTLMFLAG_NEGOTIATE_SEAL)
fprintf(handle, "NTLMFLAG_NEGOTIATE_SEAL ");
if(flags & NTLMFLAG_NEGOTIATE_DATAGRAM_STYLE)
fprintf(handle, "NTLMFLAG_NEGOTIATE_DATAGRAM_STYLE ");
if(flags & NTLMFLAG_NEGOTIATE_LM_KEY)
fprintf(handle, "NTLMFLAG_NEGOTIATE_LM_KEY ");
if(flags & NTLMFLAG_NEGOTIATE_NETWARE)
fprintf(handle, "NTLMFLAG_NEGOTIATE_NETWARE ");
if(flags & NTLMFLAG_NEGOTIATE_NTLM_KEY)
fprintf(handle, "NTLMFLAG_NEGOTIATE_NTLM_KEY ");
if(flags & (1<<10))
fprintf(handle, "NTLMFLAG_UNKNOWN_10 ");
if(flags & NTLMFLAG_NEGOTIATE_ANONYMOUS)
fprintf(handle, "NTLMFLAG_NEGOTIATE_ANONYMOUS ");
if(flags & NTLMFLAG_NEGOTIATE_DOMAIN_SUPPLIED)
fprintf(handle, "NTLMFLAG_NEGOTIATE_DOMAIN_SUPPLIED ");
if(flags & NTLMFLAG_NEGOTIATE_WORKSTATION_SUPPLIED)
fprintf(handle, "NTLMFLAG_NEGOTIATE_WORKSTATION_SUPPLIED ");
if(flags & NTLMFLAG_NEGOTIATE_LOCAL_CALL)
fprintf(handle, "NTLMFLAG_NEGOTIATE_LOCAL_CALL ");
if(flags & NTLMFLAG_NEGOTIATE_ALWAYS_SIGN)
fprintf(handle, "NTLMFLAG_NEGOTIATE_ALWAYS_SIGN ");
if(flags & NTLMFLAG_TARGET_TYPE_DOMAIN)
fprintf(handle, "NTLMFLAG_TARGET_TYPE_DOMAIN ");
if(flags & NTLMFLAG_TARGET_TYPE_SERVER)
fprintf(handle, "NTLMFLAG_TARGET_TYPE_SERVER ");
if(flags & NTLMFLAG_TARGET_TYPE_SHARE)
fprintf(handle, "NTLMFLAG_TARGET_TYPE_SHARE ");
if(flags & NTLMFLAG_NEGOTIATE_NTLM2_KEY)
fprintf(handle, "NTLMFLAG_NEGOTIATE_NTLM2_KEY ");
if(flags & NTLMFLAG_REQUEST_INIT_RESPONSE)
fprintf(handle, "NTLMFLAG_REQUEST_INIT_RESPONSE ");
if(flags & NTLMFLAG_REQUEST_ACCEPT_RESPONSE)
fprintf(handle, "NTLMFLAG_REQUEST_ACCEPT_RESPONSE ");
if(flags & NTLMFLAG_REQUEST_NONNT_SESSION_KEY)
fprintf(handle, "NTLMFLAG_REQUEST_NONNT_SESSION_KEY ");
if(flags & NTLMFLAG_NEGOTIATE_TARGET_INFO)
fprintf(handle, "NTLMFLAG_NEGOTIATE_TARGET_INFO ");
if(flags & (1<<24))
fprintf(handle, "NTLMFLAG_UNKNOWN_24 ");
if(flags & (1<<25))
fprintf(handle, "NTLMFLAG_UNKNOWN_25 ");
if(flags & (1<<26))
fprintf(handle, "NTLMFLAG_UNKNOWN_26 ");
if(flags & (1<<27))
fprintf(handle, "NTLMFLAG_UNKNOWN_27 ");
if(flags & (1<<28))
fprintf(handle, "NTLMFLAG_UNKNOWN_28 ");
if(flags & NTLMFLAG_NEGOTIATE_128)
fprintf(handle, "NTLMFLAG_NEGOTIATE_128 ");
if(flags & NTLMFLAG_NEGOTIATE_KEY_EXCHANGE)
fprintf(handle, "NTLMFLAG_NEGOTIATE_KEY_EXCHANGE ");
if(flags & NTLMFLAG_NEGOTIATE_56)
fprintf(handle, "NTLMFLAG_NEGOTIATE_56 ");
}
static void print_hex(FILE *handle, const char *buf, size_t len)
{
const char *p = buf;
fprintf(stderr, "0x");
while(len-- > 0)
fprintf(stderr, "%02.2x", (unsigned int)*p++);
}
#else
# define DEBUG_OUT(x)
#endif
/*
(*) = A "security buffer" is a triplet consisting of two shorts and one
long:
1. a 'short' containing the length of the buffer in bytes
2. a 'short' containing the allocated space for the buffer in bytes
3. a 'long' containing the offset to the start of the buffer from the
beginning of the NTLM message, in bytes.
*/
CURLntlm Curl_input_ntlm(struct connectdata *conn,
bool proxy, /* if proxy or not */
const char *header) /* rest of the www-authenticate:
header */
{
/* point to the correct struct with this */
struct ntlmdata *ntlm;
#ifndef USE_WINDOWS_SSPI
static const char type2_marker[] = { 0x02, 0x00, 0x00, 0x00 };
#endif
#ifdef USE_NSS
if(CURLE_OK != Curl_nss_force_init(conn->data))
return CURLNTLM_BAD;
#endif
ntlm = proxy?&conn->proxyntlm:&conn->ntlm;
/* skip initial whitespaces */
while(*header && ISSPACE(*header))
header++;
if(checkprefix("NTLM", header)) {
header += strlen("NTLM");
while(*header && ISSPACE(*header))
header++;
if(*header) {
/* We got a type-2 message here:
Index Description Content
0 NTLMSSP Signature Null-terminated ASCII "NTLMSSP"
(0x4e544c4d53535000)
8 NTLM Message Type long (0x02000000)
12 Target Name security buffer(*)
20 Flags long
24 Challenge 8 bytes
(32) Context (optional) 8 bytes (two consecutive longs)
(40) Target Information (optional) security buffer(*)
32 (48) start of data block
*/
size_t size;
unsigned char *buffer;
size = Curl_base64_decode(header, &buffer);
if(!buffer)
return CURLNTLM_BAD;
ntlm->state = NTLMSTATE_TYPE2; /* we got a type-2 */
#ifdef USE_WINDOWS_SSPI
ntlm->type_2 = malloc(size+1);
if(ntlm->type_2 == NULL) {
free(buffer);
return CURLE_OUT_OF_MEMORY;
}
ntlm->n_type_2 = size;
memcpy(ntlm->type_2, buffer, size);
#else
ntlm->flags = 0;
if((size < 32) ||
(memcmp(buffer, NTLMSSP_SIGNATURE, 8) != 0) ||
(memcmp(buffer+8, type2_marker, sizeof(type2_marker)) != 0)) {
/* This was not a good enough type-2 message */
free(buffer);
return CURLNTLM_BAD;
}
ntlm->flags = readint_le(&buffer[20]);
memcpy(ntlm->nonce, &buffer[24], 8);
DEBUG_OUT({
fprintf(stderr, "**** TYPE2 header flags=0x%08.8lx ", ntlm->flags);
print_flags(stderr, ntlm->flags);
fprintf(stderr, "\n nonce=");
print_hex(stderr, (char *)ntlm->nonce, 8);
fprintf(stderr, "\n****\n");
fprintf(stderr, "**** Header %s\n ", header);
});
#endif
free(buffer);
}
else {
if(ntlm->state >= NTLMSTATE_TYPE1)
return CURLNTLM_BAD;
ntlm->state = NTLMSTATE_TYPE1; /* we should sent away a type-1 */
}
}
return CURLNTLM_FINE;
}
#ifndef USE_WINDOWS_SSPI
#ifdef USE_SSLEAY
/*
* Turns a 56 bit key into the 64 bit, odd parity key and sets the key. The
* key schedule ks is also set.
*/
static void setup_des_key(const unsigned char *key_56,
DES_key_schedule DESKEYARG(ks))
{
DES_cblock key;
key[0] = key_56[0];
key[1] = (unsigned char)(((key_56[0] << 7) & 0xFF) | (key_56[1] >> 1));
key[2] = (unsigned char)(((key_56[1] << 6) & 0xFF) | (key_56[2] >> 2));
key[3] = (unsigned char)(((key_56[2] << 5) & 0xFF) | (key_56[3] >> 3));
key[4] = (unsigned char)(((key_56[3] << 4) & 0xFF) | (key_56[4] >> 4));
key[5] = (unsigned char)(((key_56[4] << 3) & 0xFF) | (key_56[5] >> 5));
key[6] = (unsigned char)(((key_56[5] << 2) & 0xFF) | (key_56[6] >> 6));
key[7] = (unsigned char) ((key_56[6] << 1) & 0xFF);
DES_set_odd_parity(&key);
DES_set_key(&key, ks);
}
#else /* defined(USE_SSLEAY) */
/*
* Turns a 56 bit key into the 64 bit, odd parity key. Used by GnuTLS and NSS.
*/
static void extend_key_56_to_64(const unsigned char *key_56, char *key)
{
key[0] = key_56[0];
key[1] = (unsigned char)(((key_56[0] << 7) & 0xFF) | (key_56[1] >> 1));
key[2] = (unsigned char)(((key_56[1] << 6) & 0xFF) | (key_56[2] >> 2));
key[3] = (unsigned char)(((key_56[2] << 5) & 0xFF) | (key_56[3] >> 3));
key[4] = (unsigned char)(((key_56[3] << 4) & 0xFF) | (key_56[4] >> 4));
key[5] = (unsigned char)(((key_56[4] << 3) & 0xFF) | (key_56[5] >> 5));
key[6] = (unsigned char)(((key_56[5] << 2) & 0xFF) | (key_56[6] >> 6));
key[7] = (unsigned char) ((key_56[6] << 1) & 0xFF);
}
#if defined(USE_GNUTLS)
/*
* Turns a 56 bit key into the 64 bit, odd parity key and sets the key.
*/
static void setup_des_key(const unsigned char *key_56,
gcry_cipher_hd_t *des)
{
char key[8];
extend_key_56_to_64(key_56, key);
gcry_cipher_setkey(*des, key, 8);
}
#elif defined(USE_NSS)
/*
* Expands a 56 bit key KEY_56 to 64 bit and encrypts 64 bit of data, using
* the expanded key. The caller is responsible for giving 64 bit of valid
* data is IN and (at least) 64 bit large buffer as OUT.
*/
static bool encrypt_des(const unsigned char *in, unsigned char *out,
const unsigned char *key_56)
{
const CK_MECHANISM_TYPE mech = CKM_DES_ECB; /* DES cipher in ECB mode */
PK11SlotInfo *slot = NULL;
char key[8]; /* expanded 64 bit key */
SECItem key_item;
PK11SymKey *symkey = NULL;
SECItem *param = NULL;
PK11Context *ctx = NULL;
int out_len; /* not used, required by NSS */
bool rv = FALSE;
/* use internal slot for DES encryption (requires NSS to be initialized) */
slot = PK11_GetInternalKeySlot();
if(!slot)
return FALSE;
/* expand the 56 bit key to 64 bit and wrap by NSS */
extend_key_56_to_64(key_56, key);
key_item.data = (unsigned char *)key;
key_item.len = /* hard-wired */ 8;
symkey = PK11_ImportSymKey(slot, mech, PK11_OriginUnwrap, CKA_ENCRYPT,
&key_item, NULL);
if(!symkey)
goto fail;
/* create DES encryption context */
param = PK11_ParamFromIV(mech, /* no IV in ECB mode */ NULL);
if(!param)
goto fail;
ctx = PK11_CreateContextBySymKey(mech, CKA_ENCRYPT, symkey, param);
if(!ctx)
goto fail;
/* perform the encryption */
if(SECSuccess == PK11_CipherOp(ctx, out, &out_len, /* outbuflen */ 8,
(unsigned char *)in, /* inbuflen */ 8)
&& SECSuccess == PK11_Finalize(ctx))
rv = /* all OK */ TRUE;
fail:
/* cleanup */
if(ctx)
PK11_DestroyContext(ctx, PR_TRUE);
if(symkey)
PK11_FreeSymKey(symkey);
if(param)
SECITEM_FreeItem(param, PR_TRUE);
PK11_FreeSlot(slot);
return rv;
}
#endif /* defined(USE_NSS) */
#endif /* defined(USE_SSLEAY) */
/*
* takes a 21 byte array and treats it as 3 56-bit DES keys. The
* 8 byte plaintext is encrypted with each key and the resulting 24
* bytes are stored in the results array.
*/
static void lm_resp(const unsigned char *keys,
const unsigned char *plaintext,
unsigned char *results)
{
#ifdef USE_SSLEAY
DES_key_schedule ks;
setup_des_key(keys, DESKEY(ks));
DES_ecb_encrypt((DES_cblock*) plaintext, (DES_cblock*) results,
DESKEY(ks), DES_ENCRYPT);
setup_des_key(keys+7, DESKEY(ks));
DES_ecb_encrypt((DES_cblock*) plaintext, (DES_cblock*) (results+8),
DESKEY(ks), DES_ENCRYPT);
setup_des_key(keys+14, DESKEY(ks));
DES_ecb_encrypt((DES_cblock*) plaintext, (DES_cblock*) (results+16),
DESKEY(ks), DES_ENCRYPT);
#elif defined(USE_GNUTLS)
gcry_cipher_hd_t des;
gcry_cipher_open(&des, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_ECB, 0);
setup_des_key(keys, &des);
gcry_cipher_encrypt(des, results, 8, plaintext, 8);
gcry_cipher_close(des);
gcry_cipher_open(&des, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_ECB, 0);
setup_des_key(keys+7, &des);
gcry_cipher_encrypt(des, results+8, 8, plaintext, 8);
gcry_cipher_close(des);
gcry_cipher_open(&des, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_ECB, 0);
setup_des_key(keys+14, &des);
gcry_cipher_encrypt(des, results+16, 8, plaintext, 8);
gcry_cipher_close(des);
#elif defined(USE_NSS)
encrypt_des(plaintext, results, keys);
encrypt_des(plaintext, results+8, keys+7);
encrypt_des(plaintext, results+16, keys+14);
#endif
}
/*
* Set up lanmanager hashed password
*/
static void mk_lm_hash(struct SessionHandle *data,
const char *password,
unsigned char *lmbuffer /* 21 bytes */)
{
unsigned char pw[14];
static const unsigned char magic[] = {
0x4B, 0x47, 0x53, 0x21, 0x40, 0x23, 0x24, 0x25 /* i.e. KGS!@#$% */
};
size_t len = CURLMIN(strlen(password), 14);
Curl_strntoupper((char *)pw, password, len);
memset(&pw[len], 0, 14-len);
#ifdef CURL_DOES_CONVERSIONS
/*
* The LanManager hashed password needs to be created using the
* password in the network encoding not the host encoding.
*/
if(data)
Curl_convert_to_network(data, (char *)pw, 14);
#else
(void)data;
#endif
{
/* Create LanManager hashed password. */
#ifdef USE_SSLEAY
DES_key_schedule ks;
setup_des_key(pw, DESKEY(ks));
DES_ecb_encrypt((DES_cblock *)magic, (DES_cblock *)lmbuffer,
DESKEY(ks), DES_ENCRYPT);
setup_des_key(pw+7, DESKEY(ks));
DES_ecb_encrypt((DES_cblock *)magic, (DES_cblock *)(lmbuffer+8),
DESKEY(ks), DES_ENCRYPT);
#elif defined(USE_GNUTLS)
gcry_cipher_hd_t des;
gcry_cipher_open(&des, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_ECB, 0);
setup_des_key(pw, &des);
gcry_cipher_encrypt(des, lmbuffer, 8, magic, 8);
gcry_cipher_close(des);
gcry_cipher_open(&des, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_ECB, 0);
setup_des_key(pw+7, &des);
gcry_cipher_encrypt(des, lmbuffer+8, 8, magic, 8);
gcry_cipher_close(des);
#elif defined(USE_NSS)
encrypt_des(magic, lmbuffer, pw);
encrypt_des(magic, lmbuffer+8, pw+7);
#endif
memset(lmbuffer + 16, 0, 21 - 16);
}
}
#if USE_NTRESPONSES
static void ascii_to_unicode_le(unsigned char *dest, const char *src,
size_t srclen)
{
size_t i;
for (i=0; i<srclen; i++) {
dest[2*i] = (unsigned char)src[i];
dest[2*i+1] = '\0';
}
}
/*
* Set up nt hashed passwords
*/
static CURLcode mk_nt_hash(struct SessionHandle *data,
const char *password,
unsigned char *ntbuffer /* 21 bytes */)
{
size_t len = strlen(password);
unsigned char *pw = malloc(len*2);
if(!pw)
return CURLE_OUT_OF_MEMORY;
ascii_to_unicode_le(pw, password, len);
#ifdef CURL_DOES_CONVERSIONS
/*
* The NT hashed password needs to be created using the
* password in the network encoding not the host encoding.
*/
if(data)
Curl_convert_to_network(data, (char *)pw, len*2);
#else
(void)data;
#endif
{
/* Create NT hashed password. */
#ifdef USE_SSLEAY
MD4_CTX MD4pw;
MD4_Init(&MD4pw);
MD4_Update(&MD4pw, pw, 2*len);
MD4_Final(ntbuffer, &MD4pw);
#elif defined(USE_GNUTLS)
gcry_md_hd_t MD4pw;
gcry_md_open(&MD4pw, GCRY_MD_MD4, 0);
gcry_md_write(MD4pw, pw, 2*len);
memcpy (ntbuffer, gcry_md_read (MD4pw, 0), MD4_DIGEST_LENGTH);
gcry_md_close(MD4pw);
#elif defined(USE_NSS)
Curl_md4it(ntbuffer, pw, 2*len);
#endif
memset(ntbuffer + 16, 0, 21 - 16);
}
free(pw);
return CURLE_OK;
}
#endif
#endif
#ifdef USE_WINDOWS_SSPI
static void
ntlm_sspi_cleanup(struct ntlmdata *ntlm)
{
if(ntlm->type_2) {
free(ntlm->type_2);
ntlm->type_2 = NULL;
}
if(ntlm->has_handles) {
s_pSecFn->DeleteSecurityContext(&ntlm->c_handle);
s_pSecFn->FreeCredentialsHandle(&ntlm->handle);
ntlm->has_handles = 0;
}
if(ntlm->p_identity) {
if(ntlm->identity.User) free(ntlm->identity.User);
if(ntlm->identity.Password) free(ntlm->identity.Password);
if(ntlm->identity.Domain) free(ntlm->identity.Domain);
ntlm->p_identity = NULL;
}
}
#endif
#define SHORTPAIR(x) ((x) & 0xff), (((x) >> 8) & 0xff)
#define LONGQUARTET(x) ((x) & 0xff), (((x) >> 8)&0xff), \
(((x) >>16)&0xff), (((x)>>24) & 0xff)
#define HOSTNAME_MAX 1024
/* this is for creating ntlm header output */
CURLcode Curl_output_ntlm(struct connectdata *conn,
bool proxy)
{
const char *domain=""; /* empty */
char host [HOSTNAME_MAX+ 1] = ""; /* empty */
#ifndef USE_WINDOWS_SSPI
size_t domlen = strlen(domain);
size_t hostlen = strlen(host);
size_t hostoff; /* host name offset */
size_t domoff; /* domain name offset */
#endif
size_t size;
char *base64=NULL;
unsigned char ntlmbuf[1024]; /* enough, unless the user+host+domain is very
long */
/* point to the address of the pointer that holds the string to sent to the
server, which is for a plain host or for a HTTP proxy */
char **allocuserpwd;
/* point to the name and password for this */
const char *userp;
const char *passwdp;
/* point to the correct struct with this */
struct ntlmdata *ntlm;
struct auth *authp;
DEBUGASSERT(conn);
DEBUGASSERT(conn->data);
#ifdef USE_NSS
if(CURLE_OK != Curl_nss_force_init(conn->data))
return CURLE_OUT_OF_MEMORY;
#endif
if(proxy) {
allocuserpwd = &conn->allocptr.proxyuserpwd;
userp = conn->proxyuser;
passwdp = conn->proxypasswd;
ntlm = &conn->proxyntlm;
authp = &conn->data->state.authproxy;
}
else {
allocuserpwd = &conn->allocptr.userpwd;
userp = conn->user;
passwdp = conn->passwd;
ntlm = &conn->ntlm;
authp = &conn->data->state.authhost;
}
authp->done = FALSE;
/* not set means empty */
if(!userp)
userp="";
if(!passwdp)
passwdp="";
#ifdef USE_WINDOWS_SSPI
if (s_hSecDll == NULL) {
/* not thread safe and leaks - use curl_global_init() to avoid */
CURLcode err = Curl_sspi_global_init();
if (s_hSecDll == NULL)
return err;
}
#endif
switch(ntlm->state) {
case NTLMSTATE_TYPE1:
default: /* for the weird cases we (re)start here */
#ifdef USE_WINDOWS_SSPI
{
SecBuffer buf;
SecBufferDesc desc;
SECURITY_STATUS status;
ULONG attrs;
const char *user;
int domlen;
TimeStamp tsDummy; /* For Windows 9x compatibility of SPPI calls */
ntlm_sspi_cleanup(ntlm);
user = strchr(userp, '\\');
if(!user)
user = strchr(userp, '/');
if(user) {
domain = userp;
domlen = user - userp;
user++;
}
else {
user = userp;
domain = "";
domlen = 0;
}
if(user && *user) {
/* note: initialize all of this before doing the mallocs so that
* it can be cleaned up later without leaking memory.
*/
ntlm->p_identity = &ntlm->identity;
memset(ntlm->p_identity, 0, sizeof(*ntlm->p_identity));
if((ntlm->identity.User = (unsigned char *)strdup(user)) == NULL)
return CURLE_OUT_OF_MEMORY;
ntlm->identity.UserLength = strlen(user);
if((ntlm->identity.Password = (unsigned char *)strdup(passwdp)) == NULL)
return CURLE_OUT_OF_MEMORY;
ntlm->identity.PasswordLength = strlen(passwdp);
if((ntlm->identity.Domain = malloc(domlen+1)) == NULL)
return CURLE_OUT_OF_MEMORY;
strncpy((char *)ntlm->identity.Domain, domain, domlen);
ntlm->identity.Domain[domlen] = '\0';
ntlm->identity.DomainLength = domlen;
ntlm->identity.Flags = SEC_WINNT_AUTH_IDENTITY_ANSI;
}
else {
ntlm->p_identity = NULL;
}
if(s_pSecFn->AcquireCredentialsHandleA(
NULL, (char *)"NTLM", SECPKG_CRED_OUTBOUND, NULL, ntlm->p_identity,
NULL, NULL, &ntlm->handle, &tsDummy
) != SEC_E_OK) {
return CURLE_OUT_OF_MEMORY;
}
desc.ulVersion = SECBUFFER_VERSION;
desc.cBuffers = 1;
desc.pBuffers = &buf;
buf.cbBuffer = sizeof(ntlmbuf);
buf.BufferType = SECBUFFER_TOKEN;
buf.pvBuffer = ntlmbuf;
status = s_pSecFn->InitializeSecurityContextA(&ntlm->handle, NULL,
(char *) host,
ISC_REQ_CONFIDENTIALITY |
ISC_REQ_REPLAY_DETECT |
ISC_REQ_CONNECTION,
0, SECURITY_NETWORK_DREP,
NULL, 0,
&ntlm->c_handle, &desc,
&attrs, &tsDummy);
if(status == SEC_I_COMPLETE_AND_CONTINUE ||
status == SEC_I_CONTINUE_NEEDED) {
s_pSecFn->CompleteAuthToken(&ntlm->c_handle, &desc);
}
else if(status != SEC_E_OK) {
s_pSecFn->FreeCredentialsHandle(&ntlm->handle);
return CURLE_RECV_ERROR;
}
ntlm->has_handles = 1;
size = buf.cbBuffer;
}
#else
hostoff = 0;
domoff = hostoff + hostlen; /* This is 0: remember that host and domain
are empty */
/* Create and send a type-1 message:
Index Description Content
0 NTLMSSP Signature Null-terminated ASCII "NTLMSSP"
(0x4e544c4d53535000)
8 NTLM Message Type long (0x01000000)
12 Flags long
16 Supplied Domain security buffer(*)
24 Supplied Workstation security buffer(*)
32 start of data block
*/
#if USE_NTLM2SESSION
#define NTLM2FLAG NTLMFLAG_NEGOTIATE_NTLM2_KEY
#else
#define NTLM2FLAG 0
#endif
snprintf((char *)ntlmbuf, sizeof(ntlmbuf), NTLMSSP_SIGNATURE "%c"
"\x01%c%c%c" /* 32-bit type = 1 */
"%c%c%c%c" /* 32-bit NTLM flag field */
"%c%c" /* domain length */
"%c%c" /* domain allocated space */
"%c%c" /* domain name offset */
"%c%c" /* 2 zeroes */
"%c%c" /* host length */
"%c%c" /* host allocated space */
"%c%c" /* host name offset */
"%c%c" /* 2 zeroes */
"%s" /* host name */
"%s", /* domain string */
0, /* trailing zero */
0,0,0, /* part of type-1 long */
LONGQUARTET(
NTLMFLAG_NEGOTIATE_OEM|
NTLMFLAG_REQUEST_TARGET|
NTLMFLAG_NEGOTIATE_NTLM_KEY|
NTLM2FLAG|
NTLMFLAG_NEGOTIATE_ALWAYS_SIGN
),
SHORTPAIR(domlen),
SHORTPAIR(domlen),
SHORTPAIR(domoff),
0,0,
SHORTPAIR(hostlen),
SHORTPAIR(hostlen),
SHORTPAIR(hostoff),
0,0,
host /* this is empty */, domain /* this is empty */);
/* initial packet length */
size = 32 + hostlen + domlen;
#endif
DEBUG_OUT({
fprintf(stderr, "**** TYPE1 header flags=0x%02.2x%02.2x%02.2x%02.2x 0x%08.8x ",
LONGQUARTET(NTLMFLAG_NEGOTIATE_OEM|
NTLMFLAG_REQUEST_TARGET|
NTLMFLAG_NEGOTIATE_NTLM_KEY|
NTLM2FLAG|
NTLMFLAG_NEGOTIATE_ALWAYS_SIGN),
NTLMFLAG_NEGOTIATE_OEM|
NTLMFLAG_REQUEST_TARGET|
NTLMFLAG_NEGOTIATE_NTLM_KEY|
NTLM2FLAG|
NTLMFLAG_NEGOTIATE_ALWAYS_SIGN);
print_flags(stderr,
NTLMFLAG_NEGOTIATE_OEM|
NTLMFLAG_REQUEST_TARGET|
NTLMFLAG_NEGOTIATE_NTLM_KEY|
NTLM2FLAG|
NTLMFLAG_NEGOTIATE_ALWAYS_SIGN);
fprintf(stderr, "\n****\n");
});
/* now size is the size of the base64 encoded package size */
size = Curl_base64_encode(NULL, (char *)ntlmbuf, size, &base64);
if(size >0 ) {
Curl_safefree(*allocuserpwd);
*allocuserpwd = aprintf("%sAuthorization: NTLM %s\r\n",
proxy?"Proxy-":"",
base64);
DEBUG_OUT(fprintf(stderr, "**** Header %s\n ", *allocuserpwd));
free(base64);
}
else
return CURLE_OUT_OF_MEMORY; /* FIX TODO */
break;
case NTLMSTATE_TYPE2:
/* We received the type-2 message already, create a type-3 message:
Index Description Content
0 NTLMSSP Signature Null-terminated ASCII "NTLMSSP"
(0x4e544c4d53535000)
8 NTLM Message Type long (0x03000000)
12 LM/LMv2 Response security buffer(*)
20 NTLM/NTLMv2 Response security buffer(*)
28 Domain Name security buffer(*)
36 User Name security buffer(*)
44 Workstation Name security buffer(*)
(52) Session Key (optional) security buffer(*)
(60) Flags (optional) long
52 (64) start of data block
*/
{
#ifdef USE_WINDOWS_SSPI
SecBuffer type_2, type_3;
SecBufferDesc type_2_desc, type_3_desc;
SECURITY_STATUS status;
ULONG attrs;
TimeStamp tsDummy; /* For Windows 9x compatibility of SPPI calls */
type_2_desc.ulVersion = type_3_desc.ulVersion = SECBUFFER_VERSION;
type_2_desc.cBuffers = type_3_desc.cBuffers = 1;
type_2_desc.pBuffers = &type_2;
type_3_desc.pBuffers = &type_3;
type_2.BufferType = SECBUFFER_TOKEN;
type_2.pvBuffer = ntlm->type_2;
type_2.cbBuffer = ntlm->n_type_2;
type_3.BufferType = SECBUFFER_TOKEN;
type_3.pvBuffer = ntlmbuf;
type_3.cbBuffer = sizeof(ntlmbuf);
status = s_pSecFn->InitializeSecurityContextA(&ntlm->handle, &ntlm->c_handle,
(char *) host,
ISC_REQ_CONFIDENTIALITY |
ISC_REQ_REPLAY_DETECT |
ISC_REQ_CONNECTION,
0, SECURITY_NETWORK_DREP, &type_2_desc,
0, &ntlm->c_handle, &type_3_desc,
&attrs, &tsDummy);
if(status != SEC_E_OK)
return CURLE_RECV_ERROR;
size = type_3.cbBuffer;
ntlm_sspi_cleanup(ntlm);
#else
int lmrespoff;
unsigned char lmresp[24]; /* fixed-size */
#if USE_NTRESPONSES
int ntrespoff;
unsigned char ntresp[24]; /* fixed-size */
#endif
size_t useroff;
const char *user;
size_t userlen;
user = strchr(userp, '\\');
if(!user)
user = strchr(userp, '/');
if(user) {
domain = userp;
domlen = (user - domain);
user++;
}
else
user = userp;
userlen = strlen(user);
if(gethostname(host, HOSTNAME_MAX)) {
infof(conn->data, "gethostname() failed, continuing without!");
hostlen = 0;
}
else {
/* If the workstation if configured with a full DNS name (i.e.
* workstation.somewhere.net) gethostname() returns the fully qualified
* name, which NTLM doesn't like.
*/
char *dot = strchr(host, '.');
if(dot)
*dot = '\0';
hostlen = strlen(host);
}
#if USE_NTLM2SESSION
/* We don't support NTLM2 if we don't have USE_NTRESPONSES */
if(ntlm->flags & NTLMFLAG_NEGOTIATE_NTLM2_KEY) {
unsigned char ntbuffer[0x18];
unsigned char tmp[0x18];
unsigned char md5sum[MD5_DIGEST_LENGTH];
unsigned char entropy[8];
/* Need to create 8 bytes random data */
#ifdef USE_SSLEAY
MD5_CTX MD5pw;
Curl_ossl_seed(conn->data); /* Initiate the seed if not already done */
RAND_bytes(entropy,8);
#elif defined(USE_GNUTLS)
gcry_md_hd_t MD5pw;
Curl_gtls_seed(conn->data); /* Initiate the seed if not already done */
gcry_randomize(entropy, 8, GCRY_STRONG_RANDOM);
#elif defined(USE_NSS)
PK11Context *MD5pw;
unsigned int outlen;
Curl_nss_seed(conn->data); /* Initiate the seed if not already done */
PK11_GenerateRandom(entropy, 8);
#endif
/* 8 bytes random data as challenge in lmresp */
memcpy(lmresp,entropy,8);
/* Pad with zeros */
memset(lmresp+8,0,0x10);
/* Fill tmp with challenge(nonce?) + entropy */
memcpy(tmp,&ntlm->nonce[0],8);
memcpy(tmp+8,entropy,8);
#ifdef USE_SSLEAY
MD5_Init(&MD5pw);
MD5_Update(&MD5pw, tmp, 16);
MD5_Final(md5sum, &MD5pw);
#elif defined(USE_GNUTLS)
gcry_md_open(&MD5pw, GCRY_MD_MD5, 0);
gcry_md_write(MD5pw, tmp, MD5_DIGEST_LENGTH);
memcpy(md5sum, gcry_md_read (MD5pw, 0), MD5_DIGEST_LENGTH);
gcry_md_close(MD5pw);
#elif defined(USE_NSS)
MD5pw = PK11_CreateDigestContext(SEC_OID_MD5);
PK11_DigestOp(MD5pw, tmp, 16);
PK11_DigestFinal(MD5pw, md5sum, &outlen, MD5_DIGEST_LENGTH);
PK11_DestroyContext(MD5pw, PR_TRUE);
#endif
/* We shall only use the first 8 bytes of md5sum,
but the des code in lm_resp only encrypt the first 8 bytes */
if(mk_nt_hash(conn->data, passwdp, ntbuffer) == CURLE_OUT_OF_MEMORY)
return CURLE_OUT_OF_MEMORY;
lm_resp(ntbuffer, md5sum, ntresp);
/* End of NTLM2 Session code */
}
else
#endif
{
#if USE_NTRESPONSES
unsigned char ntbuffer[0x18];
#endif
unsigned char lmbuffer[0x18];
#if USE_NTRESPONSES
if(mk_nt_hash(conn->data, passwdp, ntbuffer) == CURLE_OUT_OF_MEMORY)
return CURLE_OUT_OF_MEMORY;
lm_resp(ntbuffer, &ntlm->nonce[0], ntresp);
#endif
mk_lm_hash(conn->data, passwdp, lmbuffer);
lm_resp(lmbuffer, &ntlm->nonce[0], lmresp);
/* A safer but less compatible alternative is:
* lm_resp(ntbuffer, &ntlm->nonce[0], lmresp);
* See http://davenport.sourceforge.net/ntlm.html#ntlmVersion2 */
}
lmrespoff = 64; /* size of the message header */
#if USE_NTRESPONSES
ntrespoff = lmrespoff + 0x18;
domoff = ntrespoff + 0x18;
#else
domoff = lmrespoff + 0x18;
#endif
useroff = domoff + domlen;
hostoff = useroff + userlen;
/*
* In the case the server sets the flag NTLMFLAG_NEGOTIATE_UNICODE, we
* need to filter it off because libcurl doesn't UNICODE encode the
* strings it packs into the NTLM authenticate packet.
*/
ntlm->flags &= ~NTLMFLAG_NEGOTIATE_UNICODE;
/* Create the big type-3 message binary blob */
size = snprintf((char *)ntlmbuf, sizeof(ntlmbuf),
NTLMSSP_SIGNATURE "%c"
"\x03%c%c%c" /* type-3, 32 bits */
"%c%c" /* LanManager length */
"%c%c" /* LanManager allocated space */
"%c%c" /* LanManager offset */
"%c%c" /* 2 zeroes */
"%c%c" /* NT-response length */
"%c%c" /* NT-response allocated space */
"%c%c" /* NT-response offset */
"%c%c" /* 2 zeroes */
"%c%c" /* domain length */
"%c%c" /* domain allocated space */
"%c%c" /* domain name offset */
"%c%c" /* 2 zeroes */
"%c%c" /* user length */
"%c%c" /* user allocated space */
"%c%c" /* user offset */
"%c%c" /* 2 zeroes */
"%c%c" /* host length */
"%c%c" /* host allocated space */
"%c%c" /* host offset */
"%c%c" /* 2 zeroes */
"%c%c" /* session key length (unknown purpose) */
"%c%c" /* session key allocated space (unknown purpose) */
"%c%c" /* session key offset (unknown purpose) */
"%c%c" /* 2 zeroes */
"%c%c%c%c" /* flags */
/* domain string */
/* user string */
/* host string */
/* LanManager response */
/* NT response */
,
0, /* zero termination */
0,0,0, /* type-3 long, the 24 upper bits */
SHORTPAIR(0x18), /* LanManager response length, twice */
SHORTPAIR(0x18),
SHORTPAIR(lmrespoff),
0x0, 0x0,
#if USE_NTRESPONSES
SHORTPAIR(0x18), /* NT-response length, twice */
SHORTPAIR(0x18),
SHORTPAIR(ntrespoff),
0x0, 0x0,
#else
0x0, 0x0,
0x0, 0x0,
0x0, 0x0,
0x0, 0x0,
#endif
SHORTPAIR(domlen),
SHORTPAIR(domlen),
SHORTPAIR(domoff),
0x0, 0x0,
SHORTPAIR(userlen),
SHORTPAIR(userlen),
SHORTPAIR(useroff),
0x0, 0x0,
SHORTPAIR(hostlen),
SHORTPAIR(hostlen),
SHORTPAIR(hostoff),
0x0, 0x0,
0x0, 0x0,
0x0, 0x0,
0x0, 0x0,
0x0, 0x0,
LONGQUARTET(ntlm->flags));
DEBUGASSERT(size==64);
DEBUGASSERT(size == (size_t)lmrespoff);
/* We append the binary hashes */
if(size < (sizeof(ntlmbuf) - 0x18)) {
memcpy(&ntlmbuf[size], lmresp, 0x18);
size += 0x18;
}
DEBUG_OUT({
fprintf(stderr, "**** TYPE3 header lmresp=");
print_hex(stderr, (char *)&ntlmbuf[lmrespoff], 0x18);
});
#if USE_NTRESPONSES
if(size < (sizeof(ntlmbuf) - 0x18)) {
DEBUGASSERT(size == (size_t)ntrespoff);
memcpy(&ntlmbuf[size], ntresp, 0x18);
size += 0x18;
}
DEBUG_OUT({
fprintf(stderr, "\n ntresp=");
print_hex(stderr, (char *)&ntlmbuf[ntrespoff], 0x18);
});
#endif
DEBUG_OUT({
fprintf(stderr, "\n flags=0x%02.2x%02.2x%02.2x%02.2x 0x%08.8x ",
LONGQUARTET(ntlm->flags), ntlm->flags);
print_flags(stderr, ntlm->flags);
fprintf(stderr, "\n****\n");
});
/* Make sure that the domain, user and host strings fit in the target
buffer before we copy them there. */
if(size + userlen + domlen + hostlen >= sizeof(ntlmbuf)) {
failf(conn->data, "user + domain + host name too big");
return CURLE_OUT_OF_MEMORY;
}
DEBUGASSERT(size == domoff);
memcpy(&ntlmbuf[size], domain, domlen);
size += domlen;
DEBUGASSERT(size == useroff);
memcpy(&ntlmbuf[size], user, userlen);
size += userlen;
DEBUGASSERT(size == hostoff);
memcpy(&ntlmbuf[size], host, hostlen);
size += hostlen;
#ifdef CURL_DOES_CONVERSIONS
/* convert domain, user, and host to ASCII but leave the rest as-is */
if(CURLE_OK != Curl_convert_to_network(conn->data,
(char *)&ntlmbuf[domoff],
size-domoff)) {
return CURLE_CONV_FAILED;
}
#endif /* CURL_DOES_CONVERSIONS */
#endif
/* convert the binary blob into base64 */
size = Curl_base64_encode(NULL, (char *)ntlmbuf, size, &base64);
if(size >0 ) {
Curl_safefree(*allocuserpwd);
*allocuserpwd = aprintf("%sAuthorization: NTLM %s\r\n",
proxy?"Proxy-":"",
base64);
DEBUG_OUT(fprintf(stderr, "**** %s\n ", *allocuserpwd));
free(base64);
}
else
return CURLE_OUT_OF_MEMORY; /* FIX TODO */
ntlm->state = NTLMSTATE_TYPE3; /* we sent a type-3 */
authp->done = TRUE;
}
break;
case NTLMSTATE_TYPE3:
/* connection is already authenticated,
* don't send a header in future requests */
if(*allocuserpwd) {
free(*allocuserpwd);
*allocuserpwd=NULL;
}
authp->done = TRUE;
break;
}
return CURLE_OK;
}
void
Curl_ntlm_cleanup(struct connectdata *conn)
{
#ifdef USE_WINDOWS_SSPI
ntlm_sspi_cleanup(&conn->ntlm);
ntlm_sspi_cleanup(&conn->proxyntlm);
#else
(void)conn;
#endif
}
#endif /* USE_NTLM */
#endif /* !CURL_DISABLE_HTTP */
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