/*************************************************************************** * _ _ ____ _ * 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. * * $Id$ ***************************************************************************/ #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> # include <openssl/md4.h> # include <openssl/md5.h> # include <openssl/ssl.h> # include <openssl/rand.h> # else # include <des.h> # include <md4.h> # 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 #elif defined(USE_GNUTLS) #include "gtls.h" #include <gcrypt.h> #define MD5_DIGEST_LENGTH 16 #define MD4_DIGEST_LENGTH 16 #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" /* 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 #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 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); } #elif 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]; 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); gcry_cipher_setkey(*des, key, 8); } #endif /* * 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 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); #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 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); #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 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); #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); 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 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); #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 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); #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 */ #if USE_NTLM2SESSION } #endif 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 */