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curl/lib/http_ntlm.c
Daniel Stenberg c828646f60 CURL_DOES_CONVERSIONS: cleanup 
Massively reduce #ifdefs all over (23 #ifdef lines less so far)
Moved conversion-specific code to non-ascii.c
2011-04-20 00:50:07 +02:00

1296 lines
39 KiB
C
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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2011, 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 "non-ascii.h" /* for Curl_convert_... prototypes */
#include "sendf.h"
#include "rawstr.h"
#include "curl_base64.h"
#include "http_ntlm.h"
#include "url.h"
#include "curl_gethostname.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);
/*
* The LanManager hashed password needs to be created using the
* password in the network encoding not the host encoding.
*/
if(Curl_convert_to_network(data, (char *)pw, 14))
return;
{
/* 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);
CURLcode result;
if(!pw)
return CURLE_OUT_OF_MEMORY;
ascii_to_unicode_le(pw, password, len);
/*
* The NT hashed password needs to be created using the password in the
* network encoding not the host encoding.
*/
result = Curl_convert_to_network(data, (char *)pw, len*2);
if(result)
return result;
{
/* 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(Curl_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;
/* convert domain, user, and host to ASCII but leave the rest as-is */
if(Curl_convert_to_network(conn->data, (char *)&ntlmbuf[domoff],
size-domoff))
return CURLE_CONV_FAILED;
#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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