From 9f084101dd392ceb85f141f55ee56bed344626ef Mon Sep 17 00:00:00 2001 From: Andrew Bartlett Date: Sun, 2 May 2004 08:45:00 +0000 Subject: r443: Update Samba4 to the auth and NTLMSSP code from Samba3. Not all the auth code is merged - only those parts that are actually being used in Samba4. There is a lot more work to do in the NTLMSSP area, and I hope to develop that work here. There is a start on this here - splitting NTLMSSP into two parts that my operate in an async fashion (before and after the actual authentication) Andrew Bartlett (This used to be commit 5876c78806e6a6c44613a1354e8d564b427d0c9f) --- source4/libcli/auth/ntlm_check.c | 445 ++++++++++++++++++++++++++++++++++++ source4/libcli/auth/ntlmssp.c | 246 ++++++++++++++------ source4/libcli/auth/ntlmssp.h | 7 + source4/libcli/auth/ntlmssp_parse.c | 20 +- source4/libcli/auth/ntlmssp_sign.c | 67 ++++-- 5 files changed, 689 insertions(+), 96 deletions(-) create mode 100644 source4/libcli/auth/ntlm_check.c (limited to 'source4/libcli/auth') diff --git a/source4/libcli/auth/ntlm_check.c b/source4/libcli/auth/ntlm_check.c new file mode 100644 index 0000000000..a7764f9e98 --- /dev/null +++ b/source4/libcli/auth/ntlm_check.c @@ -0,0 +1,445 @@ +/* + Unix SMB/CIFS implementation. + Password and authentication handling + Copyright (C) Andrew Tridgell 1992-2000 + Copyright (C) Luke Kenneth Casson Leighton 1996-2000 + Copyright (C) Andrew Bartlett 2001-2003 + Copyright (C) Gerald Carter 2003 + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +#include "includes.h" + +#undef DBGC_CLASS +#define DBGC_CLASS DBGC_AUTH + +/**************************************************************************** + Core of smb password checking routine. +****************************************************************************/ + +static BOOL smb_pwd_check_ntlmv1(const DATA_BLOB *nt_response, + const uchar *part_passwd, + const DATA_BLOB *sec_blob, + DATA_BLOB *user_sess_key) +{ + /* Finish the encryption of part_passwd. */ + uchar p24[24]; + + if (part_passwd == NULL) { + DEBUG(10,("No password set - DISALLOWING access\n")); + /* No password set - always false ! */ + return False; + } + + if (sec_blob->length != 8) { + DEBUG(0, ("smb_pwd_check_ntlmv1: incorrect challenge size (%lu)\n", + (unsigned long)sec_blob->length)); + return False; + } + + if (nt_response->length != 24) { + DEBUG(0, ("smb_pwd_check_ntlmv1: incorrect password length (%lu)\n", + (unsigned long)nt_response->length)); + return False; + } + + SMBOWFencrypt(part_passwd, sec_blob->data, p24); + if (user_sess_key != NULL) { + *user_sess_key = data_blob(NULL, 16); + SMBsesskeygen_ntv1(part_passwd, NULL, user_sess_key->data); + } + + +#if DEBUG_PASSWORD + DEBUG(100,("Part password (P16) was |\n")); + dump_data(100, part_passwd, 16); + DEBUGADD(100,("Password from client was |\n")); + dump_data(100, nt_response->data, nt_response->length); + DEBUGADD(100,("Given challenge was |\n")); + dump_data(100, sec_blob->data, sec_blob->length); + DEBUGADD(100,("Value from encryption was |\n")); + dump_data(100, p24, 24); +#endif + return (memcmp(p24, nt_response->data, 24) == 0); +} + +/**************************************************************************** + Core of smb password checking routine. (NTLMv2, LMv2) + Note: The same code works with both NTLMv2 and LMv2. +****************************************************************************/ + +static BOOL smb_pwd_check_ntlmv2(const DATA_BLOB *ntv2_response, + const uchar *part_passwd, + const DATA_BLOB *sec_blob, + const char *user, const char *domain, + BOOL upper_case_domain, /* should the domain be transformed into upper case? */ + DATA_BLOB *user_sess_key) +{ + /* Finish the encryption of part_passwd. */ + uchar kr[16]; + uchar value_from_encryption[16]; + uchar client_response[16]; + DATA_BLOB client_key_data; + + if (part_passwd == NULL) { + DEBUG(10,("No password set - DISALLOWING access\n")); + /* No password set - always False */ + return False; + } + + if (sec_blob->length != 8) { + DEBUG(0, ("smb_pwd_check_ntlmv2: incorrect challenge size (%lu)\n", + (unsigned long)sec_blob->length)); + return False; + } + + if (ntv2_response->length < 24) { + /* We MUST have more than 16 bytes, or the stuff below will go + crazy. No known implementation sends less than the 24 bytes + for LMv2, let alone NTLMv2. */ + DEBUG(0, ("smb_pwd_check_ntlmv2: incorrect password length (%lu)\n", + (unsigned long)ntv2_response->length)); + return False; + } + + client_key_data = data_blob(ntv2_response->data+16, ntv2_response->length-16); + /* + todo: should we be checking this for anything? We can't for LMv2, + but for NTLMv2 it is meant to contain the current time etc. + */ + + memcpy(client_response, ntv2_response->data, sizeof(client_response)); + + if (!ntv2_owf_gen(part_passwd, user, domain, upper_case_domain, kr)) { + return False; + } + + SMBOWFencrypt_ntv2(kr, sec_blob, &client_key_data, value_from_encryption); + if (user_sess_key != NULL) { + *user_sess_key = data_blob(NULL, 16); + SMBsesskeygen_ntv2(kr, value_from_encryption, user_sess_key->data); + } + +#if DEBUG_PASSWORD + DEBUG(100,("Part password (P16) was |\n")); + dump_data(100, part_passwd, 16); + DEBUGADD(100,("Password from client was |\n")); + dump_data(100, ntv2_response->data, ntv2_response->length); + DEBUGADD(100,("Variable data from client was |\n")); + dump_data(100, client_key_data.data, client_key_data.length); + DEBUGADD(100,("Given challenge was |\n")); + dump_data(100, sec_blob->data, sec_blob->length); + DEBUGADD(100,("Value from encryption was |\n")); + dump_data(100, value_from_encryption, 16); +#endif + data_blob_clear_free(&client_key_data); + return (memcmp(value_from_encryption, client_response, 16) == 0); +} + +/** + * Check a challenge-response password against the value of the NT or + * LM password hash. + * + * @param mem_ctx talloc context + * @param challenge 8-byte challenge. If all zero, forces plaintext comparison + * @param nt_response 'unicode' NT response to the challenge, or unicode password + * @param lm_response ASCII or LANMAN response to the challenge, or password in DOS code page + * @param username internal Samba username, for log messages + * @param client_username username the client used + * @param client_domain domain name the client used (may be mapped) + * @param nt_pw MD4 unicode password from our passdb or similar + * @param lm_pw LANMAN ASCII password from our passdb or similar + * @param user_sess_key User session key + * @param lm_sess_key LM session key (first 8 bytes of the LM hash) + */ + +NTSTATUS ntlm_password_check(TALLOC_CTX *mem_ctx, + const DATA_BLOB *challenge, + const DATA_BLOB *lm_response, + const DATA_BLOB *nt_response, + const DATA_BLOB *lm_interactive_pwd, + const DATA_BLOB *nt_interactive_pwd, + const char *username, + const char *client_username, + const char *client_domain, + const uint8 *lm_pw, const uint8 *nt_pw, + DATA_BLOB *user_sess_key, + DATA_BLOB *lm_sess_key) +{ + static const unsigned char zeros[8]; + if (nt_pw == NULL) { + DEBUG(3,("ntlm_password_check: NO NT password stored for user %s.\n", + username)); + } + + if (nt_interactive_pwd && nt_interactive_pwd->length && nt_pw) { + if (nt_interactive_pwd->length != 16) { + DEBUG(3,("ntlm_password_check: Interactive logon: Invalid NT password length (%d) supplied for user %s\n", (int)nt_interactive_pwd->length, + username)); + return NT_STATUS_WRONG_PASSWORD; + } + + if (memcmp(nt_interactive_pwd->data, nt_pw, 16) == 0) { + if (user_sess_key) { + *user_sess_key = data_blob(NULL, 16); + SMBsesskeygen_ntv1(nt_pw, NULL, user_sess_key->data); + } + return NT_STATUS_OK; + } else { + DEBUG(3,("ntlm_password_check: Interactive logon: NT password check failed for user %s\n", + username)); + return NT_STATUS_WRONG_PASSWORD; + } + + } else if (lm_interactive_pwd && lm_interactive_pwd->length && lm_pw) { + if (lm_interactive_pwd->length != 16) { + DEBUG(3,("ntlm_password_check: Interactive logon: Invalid LANMAN password length (%d) supplied for user %s\n", (int)lm_interactive_pwd->length, + username)); + return NT_STATUS_WRONG_PASSWORD; + } + + if (!lp_lanman_auth()) { + DEBUG(3,("ntlm_password_check: Interactive logon: only LANMAN password supplied for user %s, and LM passwords are disabled!\n", + username)); + return NT_STATUS_WRONG_PASSWORD; + } + + if (memcmp(lm_interactive_pwd->data, lm_pw, 16) == 0) { + return NT_STATUS_OK; + } else { + DEBUG(3,("ntlm_password_check: Interactive logon: LANMAN password check failed for user %s\n", + username)); + return NT_STATUS_WRONG_PASSWORD; + } + } + + /* Check for cleartext netlogon. Used by Exchange 5.5. */ + if (challenge->length == sizeof(zeros) && + (memcmp(challenge->data, zeros, challenge->length) == 0 )) { + + DEBUG(4,("ntlm_password_check: checking plaintext passwords for user %s\n", + username)); + if (nt_pw && nt_response->length) { + unsigned char pwhash[16]; + mdfour(pwhash, nt_response->data, nt_response->length); + if (memcmp(pwhash, nt_pw, sizeof(pwhash)) == 0) { + return NT_STATUS_OK; + } else { + DEBUG(3,("ntlm_password_check: NT (Unicode) plaintext password check failed for user %s\n", + username)); + return NT_STATUS_WRONG_PASSWORD; + } + + } else if (!lp_lanman_auth()) { + DEBUG(3,("ntlm_password_check: (plaintext password check) LANMAN passwords NOT PERMITTED for user %s\n", + username)); + + } else if (lm_pw && lm_response->length) { + uchar dospwd[14]; + uchar p16[16]; + ZERO_STRUCT(dospwd); + + memcpy(dospwd, lm_response->data, MIN(lm_response->length, sizeof(dospwd))); + /* Only the fisrt 14 chars are considered, password need not be null terminated. */ + + /* we *might* need to upper-case the string here */ + E_P16((const unsigned char *)dospwd, p16); + + if (memcmp(p16, lm_pw, sizeof(p16)) == 0) { + return NT_STATUS_OK; + } else { + DEBUG(3,("ntlm_password_check: LANMAN (ASCII) plaintext password check failed for user %s\n", + username)); + return NT_STATUS_WRONG_PASSWORD; + } + } else { + DEBUG(3, ("Plaintext authentication for user %s attempted, but neither NT nor LM passwords available\n", username)); + return NT_STATUS_WRONG_PASSWORD; + } + } + + if (nt_response->length != 0 && nt_response->length < 24) { + DEBUG(2,("ntlm_password_check: invalid NT password length (%lu) for user %s\n", + (unsigned long)nt_response->length, username)); + } + + if (nt_response->length >= 24 && nt_pw) { + if (nt_response->length > 24) { + /* We have the NT MD4 hash challenge available - see if we can + use it + */ + DEBUG(4,("ntlm_password_check: Checking NTLMv2 password with domain [%s]\n", client_domain)); + if (smb_pwd_check_ntlmv2( nt_response, + nt_pw, challenge, + client_username, + client_domain, + False, + user_sess_key)) { + return NT_STATUS_OK; + } + + DEBUG(4,("ntlm_password_check: Checking NTLMv2 password with uppercased version of domain [%s]\n", client_domain)); + if (smb_pwd_check_ntlmv2( nt_response, + nt_pw, challenge, + client_username, + client_domain, + True, + user_sess_key)) { + return NT_STATUS_OK; + } + + DEBUG(4,("ntlm_password_check: Checking NTLMv2 password without a domain\n")); + if (smb_pwd_check_ntlmv2( nt_response, + nt_pw, challenge, + client_username, + "", + False, + user_sess_key)) { + return NT_STATUS_OK; + } else { + DEBUG(3,("ntlm_password_check: NTLMv2 password check failed\n")); + return NT_STATUS_WRONG_PASSWORD; + } + } + + if (lp_ntlm_auth()) { + /* We have the NT MD4 hash challenge available - see if we can + use it (ie. does it exist in the smbpasswd file). + */ + DEBUG(4,("ntlm_password_check: Checking NT MD4 password\n")); + if (smb_pwd_check_ntlmv1(nt_response, + nt_pw, challenge, + user_sess_key)) { + /* The LM session key for this response is not very secure, + so use it only if we otherwise allow LM authentication */ + + if (lp_lanman_auth() && lm_pw) { + uint8 first_8_lm_hash[16]; + memcpy(first_8_lm_hash, lm_pw, 8); + memset(first_8_lm_hash + 8, '\0', 8); + *lm_sess_key = data_blob(first_8_lm_hash, 16); + } + return NT_STATUS_OK; + } else { + DEBUG(3,("ntlm_password_check: NT MD4 password check failed for user %s\n", + username)); + return NT_STATUS_WRONG_PASSWORD; + } + } else { + DEBUG(2,("ntlm_password_check: NTLMv1 passwords NOT PERMITTED for user %s\n", + username)); + /* no return, becouse we might pick up LMv2 in the LM field */ + } + } + + if (lm_response->length == 0) { + DEBUG(3,("ntlm_password_check: NEITHER LanMan nor NT password supplied for user %s\n", + username)); + return NT_STATUS_WRONG_PASSWORD; + } + + if (lm_response->length < 24) { + DEBUG(2,("ntlm_password_check: invalid LanMan password length (%lu) for user %s\n", + (unsigned long)nt_response->length, username)); + return NT_STATUS_WRONG_PASSWORD; + } + + if (!lp_lanman_auth()) { + DEBUG(3,("ntlm_password_check: Lanman passwords NOT PERMITTED for user %s\n", + username)); + } else if (!lm_pw) { + DEBUG(3,("ntlm_password_check: NO LanMan password set for user %s (and no NT password supplied)\n", + username)); + } else { + DEBUG(4,("ntlm_password_check: Checking LM password\n")); + if (smb_pwd_check_ntlmv1(lm_response, + lm_pw, challenge, + NULL)) { + uint8 first_8_lm_hash[16]; + memcpy(first_8_lm_hash, lm_pw, 8); + memset(first_8_lm_hash + 8, '\0', 8); + *user_sess_key = data_blob(first_8_lm_hash, 16); + *lm_sess_key = data_blob(first_8_lm_hash, 16); + return NT_STATUS_OK; + } + } + + if (!nt_pw) { + DEBUG(4,("ntlm_password_check: LM password check failed for user, no NT password %s\n",username)); + return NT_STATUS_WRONG_PASSWORD; + } + + /* This is for 'LMv2' authentication. almost NTLMv2 but limited to 24 bytes. + - related to Win9X, legacy NAS pass-though authentication + */ + DEBUG(4,("ntlm_password_check: Checking LMv2 password with domain %s\n", client_domain)); + if (smb_pwd_check_ntlmv2( lm_response, + nt_pw, challenge, + client_username, + client_domain, + False, + NULL)) { + return NT_STATUS_OK; + } + + DEBUG(4,("ntlm_password_check: Checking LMv2 password with upper-cased version of domain %s\n", client_domain)); + if (smb_pwd_check_ntlmv2( lm_response, + nt_pw, challenge, + client_username, + client_domain, + True, + NULL)) { + return NT_STATUS_OK; + } + + DEBUG(4,("ntlm_password_check: Checking LMv2 password without a domain\n")); + if (smb_pwd_check_ntlmv2( lm_response, + nt_pw, challenge, + client_username, + "", + False, + NULL)) { + return NT_STATUS_OK; + } + + /* Apparently NT accepts NT responses in the LM field + - I think this is related to Win9X pass-though authentication + */ + DEBUG(4,("ntlm_password_check: Checking NT MD4 password in LM field\n")); + if (lp_ntlm_auth()) { + if (smb_pwd_check_ntlmv1(lm_response, + nt_pw, challenge, + NULL)) { + /* The session key for this response is still very odd. + It not very secure, so use it only if we otherwise + allow LM authentication */ + + if (lp_lanman_auth() && lm_pw) { + uint8 first_8_lm_hash[16]; + memcpy(first_8_lm_hash, lm_pw, 8); + memset(first_8_lm_hash + 8, '\0', 8); + *user_sess_key = data_blob(first_8_lm_hash, 16); + *lm_sess_key = data_blob(first_8_lm_hash, 16); + } + return NT_STATUS_OK; + } + DEBUG(3,("ntlm_password_check: LM password, NT MD4 password in LM field and LMv2 failed for user %s\n",username)); + } else { + DEBUG(3,("ntlm_password_check: LM password and LMv2 failed for user %s, and NT MD4 password in LM field not permitted\n",username)); + } + return NT_STATUS_WRONG_PASSWORD; +} + diff --git a/source4/libcli/auth/ntlmssp.c b/source4/libcli/auth/ntlmssp.c index 5fd3938a7d..00cf4d380a 100644 --- a/source4/libcli/auth/ntlmssp.c +++ b/source4/libcli/auth/ntlmssp.c @@ -282,7 +282,7 @@ void ntlmssp_end(NTLMSSP_STATE **ntlmssp_state) data_blob_free(&(*ntlmssp_state)->chal); data_blob_free(&(*ntlmssp_state)->lm_resp); data_blob_free(&(*ntlmssp_state)->nt_resp); - + data_blob_free(&(*ntlmssp_state)->encrypted_session_key); talloc_destroy(mem_ctx); } @@ -330,7 +330,7 @@ static void ntlmssp_handle_neg_flags(struct ntlmssp_state *ntlmssp_state, ntlmssp_state->unicode = False; } - if (neg_flags & NTLMSSP_NEGOTIATE_LM_KEY && allow_lm) { + if ((neg_flags & NTLMSSP_NEGOTIATE_LM_KEY) && allow_lm) { /* other end forcing us to use LM */ ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_LM_KEY; ntlmssp_state->use_ntlmv2 = False; @@ -338,9 +338,12 @@ static void ntlmssp_handle_neg_flags(struct ntlmssp_state *ntlmssp_state, ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY; } + if (neg_flags & NTLMSSP_NEGOTIATE_ALWAYS_SIGN) { + ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN; + } + if (!(neg_flags & NTLMSSP_NEGOTIATE_NTLM2)) { ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2; - ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY; } if (!(neg_flags & NTLMSSP_NEGOTIATE_128)) { @@ -403,13 +406,6 @@ static NTSTATUS ntlmssp_server_negotiate(struct ntlmssp_state *ntlmssp_state, ntlmssp_handle_neg_flags(ntlmssp_state, neg_flags, lp_lanman_auth()); - chal_flags = ntlmssp_state->neg_flags; - - target_name = ntlmssp_target_name(ntlmssp_state, - neg_flags, &chal_flags); - if (target_name == NULL) - return NT_STATUS_INVALID_PARAMETER; - /* Ask our caller what challenge they would like in the packet */ cryptkey = ntlmssp_state->get_challenge(ntlmssp_state); @@ -418,9 +414,21 @@ static NTSTATUS ntlmssp_server_negotiate(struct ntlmssp_state *ntlmssp_state, ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2; } + /* The flags we send back are not just the negotiated flags, + * they are also 'what is in this packet'. Therfore, we + * operate on 'chal_flags' from here on + */ + + chal_flags = ntlmssp_state->neg_flags; + + /* get the right name to fill in as 'target' */ + target_name = ntlmssp_target_name(ntlmssp_state, + neg_flags, &chal_flags); + if (target_name == NULL) + return NT_STATUS_INVALID_PARAMETER; + ntlmssp_state->chal = data_blob_talloc(ntlmssp_state->mem_ctx, cryptkey, 8); ntlmssp_state->internal_chal = data_blob_talloc(ntlmssp_state->mem_ctx, cryptkey, 8); - /* This should be a 'netbios domain -> DNS domain' mapping */ dnsdomname[0] = '\0'; @@ -429,7 +437,6 @@ static NTSTATUS ntlmssp_server_negotiate(struct ntlmssp_state *ntlmssp_state, dnsname[0] = '\0'; get_myfullname(dnsname); - strlower_m(dnsname); /* This creates the 'blob' of names that appears at the end of the packet */ if (chal_flags & NTLMSSP_CHAL_TARGET_INFO) @@ -486,20 +493,12 @@ static NTSTATUS ntlmssp_server_negotiate(struct ntlmssp_state *ntlmssp_state, * @return Errors or NT_STATUS_OK. */ -static NTSTATUS ntlmssp_server_auth(struct ntlmssp_state *ntlmssp_state, - const DATA_BLOB request, DATA_BLOB *reply) +static NTSTATUS ntlmssp_server_preauth(struct ntlmssp_state *ntlmssp_state, + const DATA_BLOB request) { - DATA_BLOB encrypted_session_key = data_blob(NULL, 0); - DATA_BLOB nt_session_key = data_blob(NULL, 0); - DATA_BLOB lm_session_key = data_blob(NULL, 0); - DATA_BLOB session_key = data_blob(NULL, 0); uint32 ntlmssp_command, auth_flags; NTSTATUS nt_status; - /* used by NTLM2 */ - BOOL doing_ntlm2 = False; - - uchar session_nonce[16]; uchar session_nonce_hash[16]; const char *parse_string; @@ -507,9 +506,6 @@ static NTSTATUS ntlmssp_server_auth(struct ntlmssp_state *ntlmssp_state, char *user = NULL; char *workstation = NULL; - /* parse the NTLMSSP packet */ - *reply = data_blob(NULL, 0); - #if 0 file_save("ntlmssp_auth.dat", request.data, request.length); #endif @@ -536,14 +532,14 @@ static NTSTATUS ntlmssp_server_auth(struct ntlmssp_state *ntlmssp_state, &domain, &user, &workstation, - &encrypted_session_key, + &ntlmssp_state->encrypted_session_key, &auth_flags)) { DEBUG(1, ("ntlmssp_server_auth: failed to parse NTLMSSP:\n")); dump_data(2, (const char *)request.data, request.length); SAFE_FREE(domain); SAFE_FREE(user); SAFE_FREE(workstation); - data_blob_free(&encrypted_session_key); + data_blob_free(&ntlmssp_state->encrypted_session_key); auth_flags = 0; /* Try again with a shorter string (Win9X truncates this packet) */ @@ -572,11 +568,14 @@ static NTSTATUS ntlmssp_server_auth(struct ntlmssp_state *ntlmssp_state, } } + if (auth_flags) + ntlmssp_handle_neg_flags(ntlmssp_state, auth_flags, lp_lanman_auth()); + if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_domain(ntlmssp_state, domain))) { SAFE_FREE(domain); SAFE_FREE(user); SAFE_FREE(workstation); - data_blob_free(&encrypted_session_key); + data_blob_free(&ntlmssp_state->encrypted_session_key); return nt_status; } @@ -584,7 +583,7 @@ static NTSTATUS ntlmssp_server_auth(struct ntlmssp_state *ntlmssp_state, SAFE_FREE(domain); SAFE_FREE(user); SAFE_FREE(workstation); - data_blob_free(&encrypted_session_key); + data_blob_free(&ntlmssp_state->encrypted_session_key); return nt_status; } @@ -592,7 +591,7 @@ static NTSTATUS ntlmssp_server_auth(struct ntlmssp_state *ntlmssp_state, SAFE_FREE(domain); SAFE_FREE(user); SAFE_FREE(workstation); - data_blob_free(&encrypted_session_key); + data_blob_free(&ntlmssp_state->encrypted_session_key); return nt_status; } @@ -618,13 +617,13 @@ static NTSTATUS ntlmssp_server_auth(struct ntlmssp_state *ntlmssp_state, struct MD5Context md5_session_nonce_ctx; SMB_ASSERT(ntlmssp_state->internal_chal.data && ntlmssp_state->internal_chal.length == 8); - doing_ntlm2 = True; + ntlmssp_state->doing_ntlm2 = True; - memcpy(session_nonce, ntlmssp_state->internal_chal.data, 8); - memcpy(&session_nonce[8], ntlmssp_state->lm_resp.data, 8); + memcpy(ntlmssp_state->session_nonce, ntlmssp_state->internal_chal.data, 8); + memcpy(&ntlmssp_state->session_nonce[8], ntlmssp_state->lm_resp.data, 8); MD5Init(&md5_session_nonce_ctx); - MD5Update(&md5_session_nonce_ctx, session_nonce, 16); + MD5Update(&md5_session_nonce_ctx, ntlmssp_state->session_nonce, 16); MD5Final(session_nonce_hash, &md5_session_nonce_ctx); ntlmssp_state->chal = data_blob_talloc(ntlmssp_state->mem_ctx, session_nonce_hash, 8); @@ -634,69 +633,117 @@ static NTSTATUS ntlmssp_server_auth(struct ntlmssp_state *ntlmssp_state, /* We changed the effective challenge - set it */ if (!NT_STATUS_IS_OK(nt_status = ntlmssp_state->set_challenge(ntlmssp_state, &ntlmssp_state->chal))) { - data_blob_free(&encrypted_session_key); + data_blob_free(&ntlmssp_state->encrypted_session_key); return nt_status; } } } + return NT_STATUS_OK; +} - /* Finally, actually ask if the password is OK */ - if (!NT_STATUS_IS_OK(nt_status = ntlmssp_state->check_password(ntlmssp_state, &nt_session_key, &lm_session_key))) { - data_blob_free(&encrypted_session_key); - return nt_status; - } +/** + * Next state function for the Authenticate packet + * + * @param ntlmssp_state NTLMSSP State + * @param request The request, as a DATA_BLOB + * @param reply The reply, as an allocated DATA_BLOB, caller to free. + * @return Errors or NT_STATUS_OK. + */ + +static NTSTATUS ntlmssp_server_postauth(struct ntlmssp_state *ntlmssp_state, + DATA_BLOB *user_session_key, + DATA_BLOB *lm_session_key, + DATA_BLOB *reply) +{ + NTSTATUS nt_status; + DATA_BLOB session_key = data_blob(NULL, 0); + + /* parse the NTLMSSP packet */ + *reply = data_blob(NULL, 0); + + if (user_session_key) + dump_data_pw("USER session key:\n", user_session_key->data, user_session_key->length); - dump_data_pw("NT session key:\n", nt_session_key.data, nt_session_key.length); - dump_data_pw("LM first-8:\n", lm_session_key.data, lm_session_key.length); + if (lm_session_key) + dump_data_pw("LM first-8:\n", lm_session_key->data, lm_session_key->length); /* Handle the different session key derivation for NTLM2 */ - if (doing_ntlm2) { - if (nt_session_key.data && nt_session_key.length == 16) { + if (ntlmssp_state->doing_ntlm2) { + if (user_session_key && user_session_key->data && user_session_key->length == 16) { session_key = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 16); - hmac_md5(nt_session_key.data, session_nonce, - sizeof(session_nonce), session_key.data); + hmac_md5(user_session_key->data, ntlmssp_state->session_nonce, + sizeof(ntlmssp_state->session_nonce), session_key.data); + DEBUG(10,("ntlmssp_server_auth: Created NTLM2 session key.\n")); dump_data_pw("NTLM2 session key:\n", session_key.data, session_key.length); - + + } else { + DEBUG(10,("ntlmssp_server_auth: Failed to create NTLM2 session key.\n")); + session_key = data_blob(NULL, 0); } } else if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY) { - if (lm_session_key.data && lm_session_key.length >= 8 && - ntlmssp_state->lm_resp.data && ntlmssp_state->lm_resp.length == 24) { - session_key = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 16); - SMBsesskeygen_lmv1(lm_session_key.data, ntlmssp_state->lm_resp.data, - session_key.data); - dump_data_pw("LM session key:\n", session_key.data, session_key.length); + if (lm_session_key && lm_session_key->data && lm_session_key->length >= 8) { + if (ntlmssp_state->lm_resp.data && ntlmssp_state->lm_resp.length == 24) { + session_key = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 16); + SMBsesskeygen_lm_sess_key(lm_session_key->data, ntlmssp_state->lm_resp.data, + session_key.data); + DEBUG(10,("ntlmssp_server_auth: Created NTLM session key.\n")); + dump_data_pw("LM session key:\n", session_key.data, session_key.length); + } else { + /* use the key unmodified - it's + * probably a NULL key from the guest + * login */ + session_key = *lm_session_key; + } + } else { + DEBUG(10,("ntlmssp_server_auth: Failed to create NTLM session key.\n")); + session_key = data_blob(NULL, 0); } - } else if (nt_session_key.data) { - session_key = nt_session_key; + } else if (user_session_key && user_session_key->data) { + session_key = *user_session_key; + DEBUG(10,("ntlmssp_server_auth: Using unmodified nt session key.\n")); dump_data_pw("unmodified session key:\n", session_key.data, session_key.length); + } else if (lm_session_key && lm_session_key->data) { + session_key = *lm_session_key; + DEBUG(10,("ntlmssp_server_auth: Using unmodified lm session key.\n")); + dump_data_pw("unmodified session key:\n", session_key.data, session_key.length); + } else { + DEBUG(10,("ntlmssp_server_auth: Failed to create unmodified session key.\n")); + session_key = data_blob(NULL, 0); } /* With KEY_EXCH, the client supplies the proposed session key, but encrypts it with the long-term key */ if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH) { - if (!encrypted_session_key.data || encrypted_session_key.length != 16) { - data_blob_free(&encrypted_session_key); + if (!ntlmssp_state->encrypted_session_key.data + || ntlmssp_state->encrypted_session_key.length != 16) { + data_blob_free(&ntlmssp_state->encrypted_session_key); DEBUG(1, ("Client-supplied KEY_EXCH session key was of invalid length (%u)!\n", - encrypted_session_key.length)); + ntlmssp_state->encrypted_session_key.length)); return NT_STATUS_INVALID_PARAMETER; } else if (!session_key.data || session_key.length != 16) { DEBUG(5, ("server session key is invalid (len == %u), cannot do KEY_EXCH!\n", session_key.length)); + ntlmssp_state->session_key = session_key; } else { - dump_data_pw("KEY_EXCH session key (enc):\n", encrypted_session_key.data, encrypted_session_key.length); - SamOEMhash(encrypted_session_key.data, + dump_data_pw("KEY_EXCH session key (enc):\n", + ntlmssp_state->encrypted_session_key.data, + ntlmssp_state->encrypted_session_key.length); + SamOEMhash(ntlmssp_state->encrypted_session_key.data, session_key.data, - encrypted_session_key.length); + ntlmssp_state->encrypted_session_key.length); ntlmssp_state->session_key = data_blob_talloc(ntlmssp_state->mem_ctx, - encrypted_session_key.data, - encrypted_session_key.length); - dump_data_pw("KEY_EXCH session key:\n", session_key.data, session_key.length); + ntlmssp_state->encrypted_session_key.data, + ntlmssp_state->encrypted_session_key.length); + dump_data_pw("KEY_EXCH session key:\n", ntlmssp_state->encrypted_session_key.data, + ntlmssp_state->encrypted_session_key.length); } } else { ntlmssp_state->session_key = session_key; } - data_blob_free(&encrypted_session_key); + nt_status = ntlmssp_sign_init(ntlmssp_state); + + data_blob_free(&ntlmssp_state->encrypted_session_key); /* allow arbitarily many authentications */ ntlmssp_state->expected_state = NTLMSSP_AUTH; @@ -704,6 +751,47 @@ static NTSTATUS ntlmssp_server_auth(struct ntlmssp_state *ntlmssp_state, return nt_status; } + +/** + * Next state function for the Authenticate packet + * + * @param ntlmssp_state NTLMSSP State + * @param request The request, as a DATA_BLOB + * @param reply The reply, as an allocated DATA_BLOB, caller to free. + * @return Errors or NT_STATUS_OK. + */ + +static NTSTATUS ntlmssp_server_auth(struct ntlmssp_state *ntlmssp_state, + const DATA_BLOB request, DATA_BLOB *reply) +{ + DATA_BLOB user_session_key = data_blob(NULL, 0); + DATA_BLOB lm_session_key = data_blob(NULL, 0); + NTSTATUS nt_status; + + /* parse the NTLMSSP packet */ + *reply = data_blob(NULL, 0); + + if (!NT_STATUS_IS_OK(nt_status = ntlmssp_server_preauth(ntlmssp_state, request))) { + return nt_status; + } + + /* + * Note we don't check here for NTLMv2 auth settings. If NTLMv2 auth + * is required (by "ntlm auth = no" and "lm auth = no" being set in the + * smb.conf file) and no NTLMv2 response was sent then the password check + * will fail here. JRA. + */ + + /* Finally, actually ask if the password is OK */ + + if (!NT_STATUS_IS_OK(nt_status = ntlmssp_state->check_password(ntlmssp_state, + &user_session_key, &lm_session_key))) { + return nt_status; + } + + return ntlmssp_server_postauth(ntlmssp_state, &user_session_key, &lm_session_key, reply); +} + /** * Create an NTLMSSP state machine * @@ -874,7 +962,14 @@ static NTSTATUS ntlmssp_client_challenge(struct ntlmssp_state *ntlmssp_state, } if (!ntlmssp_state->password) { + static const uchar zeros[16]; /* do nothing - blobs are zero length */ + + /* session key is all zeros */ + session_key = data_blob_talloc(ntlmssp_state->mem_ctx, zeros, 16); + + /* not doing NLTM2 without a password */ + ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2; } else if (ntlmssp_state->use_ntlmv2) { if (!struct_blob.length) { @@ -900,7 +995,7 @@ static NTSTATUS ntlmssp_client_challenge(struct ntlmssp_state *ntlmssp_state, uchar nt_hash[16]; uchar session_nonce[16]; uchar session_nonce_hash[16]; - uchar nt_session_key[16]; + uchar user_session_key[16]; E_md4hash(ntlmssp_state->password, nt_hash); lm_response = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 24); @@ -917,7 +1012,7 @@ static NTSTATUS ntlmssp_client_challenge(struct ntlmssp_state *ntlmssp_state, DEBUG(5, ("NTLMSSP challenge set by NTLM2\n")); DEBUG(5, ("challenge is: \n")); - dump_data(5, session_nonce_hash, 8); + dump_data(5, (const char *)session_nonce_hash, 8); nt_response = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 24); SMBNTencrypt(ntlmssp_state->password, @@ -926,8 +1021,8 @@ static NTSTATUS ntlmssp_client_challenge(struct ntlmssp_state *ntlmssp_state, session_key = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 16); - SMBsesskeygen_ntv1(nt_hash, NULL, nt_session_key); - hmac_md5(nt_session_key, session_nonce, sizeof(session_nonce), session_key.data); + SMBsesskeygen_ntv1(nt_hash, NULL, user_session_key); + hmac_md5(user_session_key, session_nonce, sizeof(session_nonce), session_key.data); dump_data_pw("NTLM2 session key:\n", session_key.data, session_key.length); } else { @@ -964,16 +1059,19 @@ static NTSTATUS ntlmssp_client_challenge(struct ntlmssp_state *ntlmssp_state, /* Key exchange encryptes a new client-generated session key with the password-derived key */ if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH) { + /* Make up a new session key */ uint8 client_session_key[16]; - - generate_random_buffer(client_session_key, sizeof(client_session_key), False); + generate_random_buffer(client_session_key, sizeof(client_session_key), False); + + /* Encrypt the new session key with the old one */ encrypted_session_key = data_blob(client_session_key, sizeof(client_session_key)); dump_data_pw("KEY_EXCH session key:\n", encrypted_session_key.data, encrypted_session_key.length); - SamOEMhash(encrypted_session_key.data, session_key.data, encrypted_session_key.length); + dump_data_pw("KEY_EXCH session key (enc):\n", encrypted_session_key.data, encrypted_session_key.length); + + /* Mark the new session key as the 'real' session key */ data_blob_free(&session_key); session_key = data_blob_talloc(ntlmssp_state->mem_ctx, client_session_key, sizeof(client_session_key)); - dump_data_pw("KEY_EXCH session key (enc):\n", encrypted_session_key.data, encrypted_session_key.length); } /* this generates the actual auth packet */ @@ -1018,7 +1116,7 @@ NTSTATUS ntlmssp_client_start(NTLMSSP_STATE **ntlmssp_state) *ntlmssp_state = talloc_zero(mem_ctx, sizeof(**ntlmssp_state)); if (!*ntlmssp_state) { - DEBUG(0,("ntlmssp_server_start: talloc failed!\n")); + DEBUG(0,("ntlmssp_client_start: talloc failed!\n")); talloc_destroy(mem_ctx); return NT_STATUS_NO_MEMORY; } diff --git a/source4/libcli/auth/ntlmssp.h b/source4/libcli/auth/ntlmssp.h index 8d2fcab320..d678e26e21 100644 --- a/source4/libcli/auth/ntlmssp.h +++ b/source4/libcli/auth/ntlmssp.h @@ -94,6 +94,13 @@ typedef struct ntlmssp_state DATA_BLOB session_key; uint32 neg_flags; /* the current state of negotiation with the NTLMSSP partner */ + + /* internal variables used by NTLM2 */ + BOOL doing_ntlm2; + uchar session_nonce[16]; + + /* internal variables used by KEY_EXCH (client-supplied user session key */ + DATA_BLOB encrypted_session_key; void *auth_context; diff --git a/source4/libcli/auth/ntlmssp_parse.c b/source4/libcli/auth/ntlmssp_parse.c index 3444db0306..4b3043aec8 100644 --- a/source4/libcli/auth/ntlmssp_parse.c +++ b/source4/libcli/auth/ntlmssp_parse.c @@ -216,7 +216,9 @@ BOOL msrpc_parse(const DATA_BLOB *blob, /* if odd length and unicode */ return False; } - + if (blob->data + ptr < (uint8 *)ptr || blob->data + ptr < blob->data) + return False; + if (0 < len1) { pull_string(NULL, p, blob->data + ptr, sizeof(p), len1, @@ -241,7 +243,10 @@ BOOL msrpc_parse(const DATA_BLOB *blob, if ((len1 != len2) || (ptr + len1 < ptr) || (ptr + len1 < len1) || (ptr + len1 > blob->length)) { return False; } - + + if (blob->data + ptr < (uint8 *)ptr || blob->data + ptr < blob->data) + return False; + if (0 < len1) { pull_string(NULL, p, blob->data + ptr, sizeof(p), len1, @@ -266,6 +271,10 @@ BOOL msrpc_parse(const DATA_BLOB *blob, if ((len1 != len2) || (ptr + len1 < ptr) || (ptr + len1 < len1) || (ptr + len1 > blob->length)) { return False; } + + if (blob->data + ptr < (uint8 *)ptr || blob->data + ptr < blob->data) + return False; + *b = data_blob(blob->data + ptr, len1); } break; @@ -274,6 +283,9 @@ BOOL msrpc_parse(const DATA_BLOB *blob, len1 = va_arg(ap, unsigned); /* make sure its in the right format - be strict */ NEED_DATA(len1); + if (blob->data + head_ofs < (uint8 *)head_ofs || blob->data + head_ofs < blob->data) + return False; + *b = data_blob(blob->data + head_ofs, len1); head_ofs += len1; break; @@ -284,6 +296,10 @@ BOOL msrpc_parse(const DATA_BLOB *blob, break; case 'C': s = va_arg(ap, char *); + + if (blob->data + head_ofs < (uint8 *)head_ofs || blob->data + head_ofs < blob->data) + return False; + head_ofs += pull_string(NULL, p, blob->data+head_ofs, sizeof(p), blob->length - head_ofs, STR_ASCII|STR_TERMINATE); diff --git a/source4/libcli/auth/ntlmssp_sign.c b/source4/libcli/auth/ntlmssp_sign.c index 2f510b0f98..5039a842bc 100644 --- a/source4/libcli/auth/ntlmssp_sign.c +++ b/source4/libcli/auth/ntlmssp_sign.c @@ -53,7 +53,7 @@ static void NTLMSSPcalc_ap( unsigned char *hash, unsigned char *data, int len) hash[257] = index_j; } -static void calc_hash(unsigned char *hash, const char *k2, int k2l) +static void calc_hash(unsigned char hash[258], const char *k2, int k2l) { unsigned char j = 0; int ind; @@ -78,7 +78,7 @@ static void calc_hash(unsigned char *hash, const char *k2, int k2l) hash[257] = 0; } -static void calc_ntlmv2_hash(unsigned char hash[16], char digest[16], +static void calc_ntlmv2_hash(unsigned char hash[258], unsigned char digest[16], DATA_BLOB session_key, const char *constant) { @@ -91,8 +91,8 @@ static void calc_ntlmv2_hash(unsigned char hash[16], char digest[16], MD5Init(&ctx3); MD5Update(&ctx3, session_key.data, session_key.length); - MD5Update(&ctx3, (const unsigned char *)constant, strlen(constant)); - MD5Final((unsigned char *)digest, &ctx3); + MD5Update(&ctx3, (const unsigned char *)constant, strlen(constant)+1); + MD5Final(digest, &ctx3); calc_hash(hash, digest, 16); } @@ -109,12 +109,12 @@ static NTSTATUS ntlmssp_make_packet_signature(NTLMSSP_STATE *ntlmssp_state, { if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) { HMACMD5Context ctx; - char seq_num[4]; + uchar seq_num[4]; uchar digest[16]; SIVAL(seq_num, 0, ntlmssp_state->ntlmssp_seq_num); hmac_md5_init_limK_to_64((const unsigned char *)(ntlmssp_state->send_sign_const), 16, &ctx); - hmac_md5_update((const unsigned char *)seq_num, 4, &ctx); + hmac_md5_update(seq_num, 4, &ctx); hmac_md5_update(data, length, &ctx); hmac_md5_final(digest, &ctx); @@ -122,13 +122,16 @@ static NTSTATUS ntlmssp_make_packet_signature(NTLMSSP_STATE *ntlmssp_state, , ntlmssp_state->ntlmssp_seq_num)) { return NT_STATUS_NO_MEMORY; } - switch (direction) { - case NTLMSSP_SEND: - NTLMSSPcalc_ap(ntlmssp_state->send_sign_hash, sig->data+4, sig->length-4); - break; - case NTLMSSP_RECEIVE: - NTLMSSPcalc_ap(ntlmssp_state->recv_sign_hash, sig->data+4, sig->length-4); - break; + + if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH) { + switch (direction) { + case NTLMSSP_SEND: + NTLMSSPcalc_ap(ntlmssp_state->send_sign_hash, sig->data+4, sig->length-4); + break; + case NTLMSSP_RECEIVE: + NTLMSSPcalc_ap(ntlmssp_state->recv_sign_hash, sig->data+4, sig->length-4); + break; + } } } else { uint32 crc; @@ -145,10 +148,16 @@ static NTSTATUS ntlmssp_make_packet_signature(NTLMSSP_STATE *ntlmssp_state, } NTSTATUS ntlmssp_sign_packet(NTLMSSP_STATE *ntlmssp_state, - const uchar *data, size_t length, - DATA_BLOB *sig) + const uchar *data, size_t length, + DATA_BLOB *sig) { - NTSTATUS nt_status = ntlmssp_make_packet_signature(ntlmssp_state, data, length, NTLMSSP_SEND, sig); + NTSTATUS nt_status; + if (!ntlmssp_state->session_key.length) { + DEBUG(3, ("NO session key, cannot check sign packet\n")); + return NT_STATUS_NO_USER_SESSION_KEY; + } + + nt_status = ntlmssp_make_packet_signature(ntlmssp_state, data, length, NTLMSSP_SEND, sig); /* increment counter on send */ ntlmssp_state->ntlmssp_seq_num++; @@ -168,6 +177,11 @@ NTSTATUS ntlmssp_check_packet(NTLMSSP_STATE *ntlmssp_state, DATA_BLOB local_sig; NTSTATUS nt_status; + if (!ntlmssp_state->session_key.length) { + DEBUG(3, ("NO session key, cannot check packet signature\n")); + return NT_STATUS_NO_USER_SESSION_KEY; + } + if (sig->length < 8) { DEBUG(0, ("NTLMSSP packet check failed due to short signature (%lu bytes)!\n", (unsigned long)sig->length)); @@ -194,8 +208,6 @@ NTSTATUS ntlmssp_check_packet(NTLMSSP_STATE *ntlmssp_state, return NT_STATUS_ACCESS_DENIED; } - data_blob_free(&local_sig); - /* increment counter on recieive */ ntlmssp_state->ntlmssp_seq_num++; @@ -212,6 +224,11 @@ NTSTATUS ntlmssp_seal_packet(NTLMSSP_STATE *ntlmssp_state, uchar *data, size_t length, DATA_BLOB *sig) { + if (!ntlmssp_state->session_key.length) { + DEBUG(3, ("NO session key, cannot seal packet\n")); + return NT_STATUS_NO_USER_SESSION_KEY; + } + DEBUG(10,("ntlmssp_seal_data: seal\n")); dump_data_pw("ntlmssp clear data\n", data, length); if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) { @@ -274,6 +291,11 @@ NTSTATUS ntlmssp_unseal_packet(NTLMSSP_STATE *ntlmssp_state, uchar *data, size_t length, DATA_BLOB *sig) { + if (!ntlmssp_state->session_key.length) { + DEBUG(3, ("NO session key, cannot unseal packet\n")); + return NT_STATUS_NO_USER_SESSION_KEY; + } + DEBUG(10,("ntlmssp__unseal_data: seal\n")); dump_data_pw("ntlmssp sealed data\n", data, length); if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) { @@ -299,6 +321,11 @@ NTSTATUS ntlmssp_sign_init(NTLMSSP_STATE *ntlmssp_state) DEBUG(3, ("NTLMSSP Sign/Seal - Initialising with flags:\n")); debug_ntlmssp_flags(ntlmssp_state->neg_flags); + if (!ntlmssp_state->session_key.length) { + DEBUG(3, ("NO session key, cannot intialise signing\n")); + return NT_STATUS_NO_USER_SESSION_KEY; + } + if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) { const char *send_sign_const; @@ -337,14 +364,14 @@ NTSTATUS ntlmssp_sign_init(NTLMSSP_STATE *ntlmssp_state) calc_ntlmv2_hash(ntlmssp_state->recv_sign_hash, ntlmssp_state->recv_sign_const, - ntlmssp_state->session_key, send_sign_const); + ntlmssp_state->session_key, recv_sign_const); dump_data_pw("NTLMSSP receive sign hash:\n", ntlmssp_state->recv_sign_hash, sizeof(ntlmssp_state->recv_sign_hash)); calc_ntlmv2_hash(ntlmssp_state->recv_seal_hash, ntlmssp_state->recv_seal_const, - ntlmssp_state->session_key, send_seal_const); + ntlmssp_state->session_key, recv_seal_const); dump_data_pw("NTLMSSP receive seal hash:\n", ntlmssp_state->recv_sign_hash, sizeof(ntlmssp_state->recv_sign_hash)); -- cgit