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Unix SMB/CIFS implementation.
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SMB parameters and setup
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Copyright (C) Andrew Tridgell 1992-1998
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Modified by Jeremy Allison 1995.
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Copyright (C) Jeremy Allison 1995-2000.
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Copyright (C) Luke Kennethc Casson Leighton 1996-2000.
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Copyright (C) Andrew Bartlett <abartlet@samba.org> 2002-2003
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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#include "../lib/util/byteorder.h"
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void SMBencrypt_hash(const uchar lm_hash[16], const uchar *c8, uchar p24[24])
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memcpy(p21, lm_hash, 16);
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SMBOWFencrypt(p21, c8, p24);
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DEBUG(100,("SMBencrypt_hash: lm#, challenge, response\n"));
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dump_data(100, p21, 16);
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dump_data(100, c8, 8);
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dump_data(100, p24, 24);
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This implements the X/Open SMB password encryption
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It takes a password ('unix' string), a 8 byte "crypt key"
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and puts 24 bytes of encrypted password into p24
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Returns False if password must have been truncated to create LM hash
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bool SMBencrypt(const char *passwd, const uchar *c8, uchar p24[24])
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ret = E_deshash(passwd, lm_hash);
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SMBencrypt_hash(lm_hash, c8, p24);
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* Creates the MD4 Hash of the users password in NT UNICODE.
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* @param passwd password in 'unix' charset.
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* @param p16 return password hashed with md4, caller allocated 16 byte buffer
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void E_md4hash(const char *passwd, uchar p16[16])
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/* Password must be converted to NT unicode - null terminated. */
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push_ucs2(NULL, wpwd, (const char *)passwd, 256, STR_UNICODE|STR_NOALIGN|STR_TERMINATE);
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/* Calculate length in bytes */
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len = strlen_w(wpwd) * sizeof(int16);
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mdfour(p16, (unsigned char *)wpwd, len);
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* Creates the MD5 Hash of a combination of 16 byte salt and 16 byte NT hash.
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* @param 16 byte salt.
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* @param 16 byte NT hash.
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* @param 16 byte return hashed with md5, caller allocated 16 byte buffer
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void E_md5hash(const uchar salt[16], const uchar nthash[16], uchar hash_out[16])
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struct MD5Context tctx;
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memset(hash_out, '\0', 16);
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memcpy(array, salt, 16);
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memcpy(&array[16], nthash, 16);
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MD5Update(&tctx, array, 32);
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MD5Final(hash_out, &tctx);
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* Creates the DES forward-only Hash of the users password in DOS ASCII charset
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* @param passwd password in 'unix' charset.
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* @param p16 return password hashed with DES, caller allocated 16 byte buffer
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* @return False if password was > 14 characters, and therefore may be incorrect, otherwise True
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* @note p16 is filled in regardless
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bool E_deshash(const char *passwd, uchar p16[16])
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/* Password must be converted to DOS charset - null terminated, uppercase. */
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push_ascii(dospwd, passwd, sizeof(dospwd), STR_UPPER|STR_TERMINATE);
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/* Only the fisrt 14 chars are considered, password need not be null terminated. */
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E_P16((const unsigned char *)dospwd, p16);
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if (strlen(dospwd) > 14) {
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* Creates the MD4 and DES (LM) Hash of the users password.
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* MD4 is of the NT Unicode, DES is of the DOS UPPERCASE password.
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* @param passwd password in 'unix' charset.
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* @param nt_p16 return password hashed with md4, caller allocated 16 byte buffer
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* @param p16 return password hashed with des, caller allocated 16 byte buffer
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/* Does both the NT and LM owfs of a user's password */
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void nt_lm_owf_gen(const char *pwd, uchar nt_p16[16], uchar p16[16])
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/* Calculate the MD4 hash (NT compatible) of the password */
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memset(nt_p16, '\0', 16);
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E_md4hash(pwd, nt_p16);
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#ifdef DEBUG_PASSWORD
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DEBUG(100,("nt_lm_owf_gen: pwd, nt#\n"));
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dump_data(120, (uint8 *)pwd, strlen(pwd));
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dump_data(100, nt_p16, 16);
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E_deshash(pwd, (uchar *)p16);
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#ifdef DEBUG_PASSWORD
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DEBUG(100,("nt_lm_owf_gen: pwd, lm#\n"));
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dump_data(120, (uint8 *)pwd, strlen(pwd));
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dump_data(100, p16, 16);
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/* Does both the NTLMv2 owfs of a user's password */
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bool ntv2_owf_gen(const uchar owf[16],
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const char *user_in, const char *domain_in,
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bool upper_case_domain, /* Transform the domain into UPPER case */
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size_t user_byte_len;
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size_t domain_byte_len;
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if (!push_ucs2_allocate(&user, user_in, &user_byte_len)) {
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DEBUG(0, ("push_uss2_allocate() for user failed: %s\n",
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if (!push_ucs2_allocate(&domain, domain_in, &domain_byte_len)) {
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DEBUG(0, ("push_uss2_allocate() for domain failed: %s\n",
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if (upper_case_domain)
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SMB_ASSERT(user_byte_len >= 2);
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SMB_ASSERT(domain_byte_len >= 2);
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/* We don't want null termination */
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user_byte_len = user_byte_len - 2;
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domain_byte_len = domain_byte_len - 2;
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hmac_md5_init_limK_to_64(owf, 16, &ctx);
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hmac_md5_update((const unsigned char *)user, user_byte_len, &ctx);
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hmac_md5_update((const unsigned char *)domain, domain_byte_len, &ctx);
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hmac_md5_final(kr_buf, &ctx);
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#ifdef DEBUG_PASSWORD
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DEBUG(100, ("ntv2_owf_gen: user, domain, owfkey, kr\n"));
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dump_data(100, (uint8 *)user, user_byte_len);
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dump_data(100, (uint8 *)domain, domain_byte_len);
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dump_data(100, (uint8 *)owf, 16);
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dump_data(100, (uint8 *)kr_buf, 16);
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/* Does the des encryption from the NT or LM MD4 hash. */
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void SMBOWFencrypt(const uchar passwd[16], const uchar *c8, uchar p24[24])
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memcpy(p21, passwd, 16);
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/* Does the des encryption from the FIRST 8 BYTES of the NT or LM MD4 hash. */
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void NTLMSSPOWFencrypt(const uchar passwd[8], const uchar *ntlmchalresp, uchar p24[24])
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memcpy(p21, passwd, 8);
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memset(p21 + 8, 0xbd, 8);
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E_P24(p21, ntlmchalresp, p24);
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#ifdef DEBUG_PASSWORD
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DEBUG(100,("NTLMSSPOWFencrypt: p21, c8, p24\n"));
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dump_data(100, p21, 21);
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dump_data(100, ntlmchalresp, 8);
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dump_data(100, p24, 24);
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/* Does the des encryption. */
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void SMBNTencrypt_hash(const uchar nt_hash[16], uchar *c8, uchar *p24)
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memcpy(p21, nt_hash, 16);
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SMBOWFencrypt(p21, c8, p24);
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#ifdef DEBUG_PASSWORD
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DEBUG(100,("SMBNTencrypt: nt#, challenge, response\n"));
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dump_data(100, p21, 16);
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dump_data(100, c8, 8);
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dump_data(100, p24, 24);
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/* Does the NT MD4 hash then des encryption. Plaintext version of the above. */
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void SMBNTencrypt(const char *passwd, uchar *c8, uchar *p24)
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E_md4hash(passwd, nt_hash);
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SMBNTencrypt_hash(nt_hash, c8, p24);
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/* Does the md5 encryption from the Key Response for NTLMv2. */
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void SMBOWFencrypt_ntv2(const uchar kr[16],
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const DATA_BLOB *srv_chal,
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const DATA_BLOB *cli_chal,
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hmac_md5_init_limK_to_64(kr, 16, &ctx);
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hmac_md5_update(srv_chal->data, srv_chal->length, &ctx);
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hmac_md5_update(cli_chal->data, cli_chal->length, &ctx);
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hmac_md5_final(resp_buf, &ctx);
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#ifdef DEBUG_PASSWORD
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DEBUG(100, ("SMBOWFencrypt_ntv2: srv_chal, cli_chal, resp_buf\n"));
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dump_data(100, srv_chal->data, srv_chal->length);
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dump_data(100, cli_chal->data, cli_chal->length);
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dump_data(100, resp_buf, 16);
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void SMBsesskeygen_ntv2(const uchar kr[16],
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const uchar * nt_resp, uint8 sess_key[16])
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/* a very nice, 128 bit, variable session key */
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hmac_md5_init_limK_to_64(kr, 16, &ctx);
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hmac_md5_update(nt_resp, 16, &ctx);
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hmac_md5_final((unsigned char *)sess_key, &ctx);
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#ifdef DEBUG_PASSWORD
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DEBUG(100, ("SMBsesskeygen_ntv2:\n"));
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dump_data(100, sess_key, 16);
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void SMBsesskeygen_ntv1(const uchar kr[16],
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const uchar * nt_resp, uint8 sess_key[16])
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/* yes, this session key does not change - yes, this
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is a problem - but it is 128 bits */
319
mdfour((unsigned char *)sess_key, kr, 16);
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#ifdef DEBUG_PASSWORD
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DEBUG(100, ("SMBsesskeygen_ntv1:\n"));
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dump_data(100, sess_key, 16);
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void SMBsesskeygen_lm_sess_key(const uchar lm_hash[16],
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const uchar lm_resp[24], /* only uses 8 */
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uchar partial_lm_hash[16];
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memcpy(partial_lm_hash, lm_hash, 8);
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memset(partial_lm_hash + 8, 0xbd, 8);
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SMBOWFencrypt(partial_lm_hash, lm_resp, p24);
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memcpy(sess_key, p24, 16);
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#ifdef DEBUG_PASSWORD
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DEBUG(100, ("SMBsesskeygen_lmv1_jerry:\n"));
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dump_data(100, sess_key, 16);
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DATA_BLOB NTLMv2_generate_names_blob(const char *hostname,
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DATA_BLOB names_blob = data_blob_null;
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msrpc_gen(&names_blob, "aaa",
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NTLMSSP_NAME_TYPE_DOMAIN, domain,
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NTLMSSP_NAME_TYPE_SERVER, hostname,
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static DATA_BLOB NTLMv2_generate_client_data(const DATA_BLOB *names_blob)
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uchar client_chal[8];
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DATA_BLOB response = data_blob_null;
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generate_random_buffer(client_chal, sizeof(client_chal));
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put_long_date(long_date, time(NULL));
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/* See http://www.ubiqx.org/cifs/SMB.html#SMB.8.5 */
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msrpc_gen(&response, "ddbbdb",
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0x00000101, /* Header */
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long_date, 8, /* Timestamp */
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client_chal, 8, /* client challenge */
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names_blob->data, names_blob->length); /* End of name list */
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static DATA_BLOB NTLMv2_generate_response(const uchar ntlm_v2_hash[16],
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const DATA_BLOB *server_chal,
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const DATA_BLOB *names_blob)
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uchar ntlmv2_response[16];
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DATA_BLOB ntlmv2_client_data;
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DATA_BLOB final_response;
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/* generate some data to pass into the response function - including
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the hostname and domain name of the server */
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ntlmv2_client_data = NTLMv2_generate_client_data(names_blob);
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/* Given that data, and the challenge from the server, generate a response */
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SMBOWFencrypt_ntv2(ntlm_v2_hash, server_chal, &ntlmv2_client_data, ntlmv2_response);
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final_response = data_blob(NULL, sizeof(ntlmv2_response) + ntlmv2_client_data.length);
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memcpy(final_response.data, ntlmv2_response, sizeof(ntlmv2_response));
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memcpy(final_response.data+sizeof(ntlmv2_response),
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ntlmv2_client_data.data, ntlmv2_client_data.length);
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data_blob_free(&ntlmv2_client_data);
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return final_response;
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static DATA_BLOB LMv2_generate_response(const uchar ntlm_v2_hash[16],
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const DATA_BLOB *server_chal)
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uchar lmv2_response[16];
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DATA_BLOB lmv2_client_data = data_blob(NULL, 8);
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DATA_BLOB final_response = data_blob(NULL, 24);
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/* client-supplied random data */
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generate_random_buffer(lmv2_client_data.data, lmv2_client_data.length);
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/* Given that data, and the challenge from the server, generate a response */
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SMBOWFencrypt_ntv2(ntlm_v2_hash, server_chal, &lmv2_client_data, lmv2_response);
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memcpy(final_response.data, lmv2_response, sizeof(lmv2_response));
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/* after the first 16 bytes is the random data we generated above,
426
so the server can verify us with it */
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memcpy(final_response.data+sizeof(lmv2_response),
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lmv2_client_data.data, lmv2_client_data.length);
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data_blob_free(&lmv2_client_data);
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return final_response;
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bool SMBNTLMv2encrypt_hash(const char *user, const char *domain, const uchar nt_hash[16],
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const DATA_BLOB *server_chal,
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const DATA_BLOB *names_blob,
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DATA_BLOB *lm_response, DATA_BLOB *nt_response,
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DATA_BLOB *user_session_key)
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uchar ntlm_v2_hash[16];
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/* We don't use the NT# directly. Instead we use it mashed up with
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the username and domain.
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This prevents username swapping during the auth exchange
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if (!ntv2_owf_gen(nt_hash, user, domain, False, ntlm_v2_hash)) {
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*nt_response = NTLMv2_generate_response(ntlm_v2_hash, server_chal,
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if (user_session_key) {
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*user_session_key = data_blob(NULL, 16);
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/* The NTLMv2 calculations also provide a session key, for signing etc later */
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/* use only the first 16 bytes of nt_response for session key */
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SMBsesskeygen_ntv2(ntlm_v2_hash, nt_response->data, user_session_key->data);
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*lm_response = LMv2_generate_response(ntlm_v2_hash, server_chal);
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/* Plaintext version of the above. */
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bool SMBNTLMv2encrypt(const char *user, const char *domain, const char *password,
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const DATA_BLOB *server_chal,
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const DATA_BLOB *names_blob,
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DATA_BLOB *lm_response, DATA_BLOB *nt_response,
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DATA_BLOB *user_session_key)
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E_md4hash(password, nt_hash);
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return SMBNTLMv2encrypt_hash(user, domain, nt_hash,
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lm_response, nt_response,
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/***********************************************************
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encode a password buffer with a unicode password. The buffer
492
is filled with random data to make it harder to attack.
493
************************************************************/
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bool encode_pw_buffer(uint8 buffer[516], const char *password, int string_flags)
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/* the incoming buffer can be any alignment. */
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string_flags |= STR_NOALIGN;
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new_pw_len = push_string(NULL, new_pw,
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sizeof(new_pw), string_flags);
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memcpy(&buffer[512 - new_pw_len], new_pw, new_pw_len);
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generate_random_buffer(buffer, 512 - new_pw_len);
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* The length of the new password is in the last 4 bytes of
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SIVAL(buffer, 512, new_pw_len);
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/***********************************************************
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decode a password buffer
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*new_pw_len is the length in bytes of the possibly mulitbyte
523
returned password including termination.
524
************************************************************/
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bool decode_pw_buffer(TALLOC_CTX *ctx,
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uint8 in_buffer[516],
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/* the incoming buffer can be any alignment. */
538
string_flags |= STR_NOALIGN;
541
Warning !!! : This function is called from some rpc call.
542
The password IN the buffer may be a UNICODE string.
543
The password IN new_pwrd is an ASCII string
544
If you reuse that code somewhere else check first.
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/* The length of the new password is in the last 4 bytes of the data buffer. */
549
byte_len = IVAL(in_buffer, 512);
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#ifdef DEBUG_PASSWORD
552
dump_data(100, in_buffer, 516);
555
/* Password cannot be longer than the size of the password buffer */
556
if ( (byte_len < 0) || (byte_len > 512)) {
557
DEBUG(0, ("decode_pw_buffer: incorrect password length (%d).\n", byte_len));
558
DEBUG(0, ("decode_pw_buffer: check that 'encrypt passwords = yes'\n"));
562
/* decode into the return buffer. */
563
*new_pw_len = pull_string_talloc(ctx,
567
&in_buffer[512 - byte_len],
571
if (!*pp_new_pwrd || *new_pw_len == 0) {
572
DEBUG(0, ("decode_pw_buffer: pull_string_talloc failed\n"));
576
#ifdef DEBUG_PASSWORD
577
DEBUG(100,("decode_pw_buffer: new_pwrd: "));
578
dump_data(100, (uint8 *)*pp_new_pwrd, *new_pw_len);
579
DEBUG(100,("multibyte len:%d\n", *new_pw_len));
580
DEBUG(100,("original char len:%d\n", byte_len/2));
586
/***********************************************************
587
Decode an arc4 encrypted password change buffer.
588
************************************************************/
590
void encode_or_decode_arc4_passwd_buffer(unsigned char pw_buf[532], const DATA_BLOB *psession_key)
592
struct MD5Context tctx;
593
unsigned char key_out[16];
595
/* Confounder is last 16 bytes. */
598
MD5Update(&tctx, &pw_buf[516], 16);
599
MD5Update(&tctx, psession_key->data, psession_key->length);
600
MD5Final(key_out, &tctx);
601
/* arc4 with key_out. */
602
SamOEMhash(pw_buf, key_out, 516);
605
/***********************************************************
606
Encrypt/Decrypt used for LSA secrets and trusted domain
608
************************************************************/
610
void sess_crypt_blob(DATA_BLOB *out, const DATA_BLOB *in, const DATA_BLOB *session_key, int forward)
617
uint8 bin[8], bout[8], key[7];
620
memcpy(bin, &in->data[i], MIN(8, in->length-i));
622
if (k + 7 > session_key->length) {
623
k = (session_key->length - k);
625
memcpy(key, &session_key->data[k], 7);
627
des_crypt56(bout, bin, key, forward?1:0);
629
memcpy(&out->data[i], bout, MIN(8, in->length-i));
633
/* Decrypts password-blob with session-key
634
* @param nt_hash NT hash for the session key
635
* @param data_in DATA_BLOB encrypted password
637
* Returns cleartext password in CH_UNIX
638
* Caller must free the returned string
641
char *decrypt_trustdom_secret(uint8_t nt_hash[16], DATA_BLOB *data_in)
643
DATA_BLOB data_out, sess_key;
646
fstring cleartextpwd;
648
if (!data_in || !nt_hash)
651
/* hashed twice with md4 */
652
mdfour(nt_hash, nt_hash, 16);
654
/* 16-Byte session-key */
655
sess_key = data_blob(nt_hash, 16);
656
if (sess_key.data == NULL)
659
data_out = data_blob(NULL, data_in->length);
660
if (data_out.data == NULL)
663
/* decrypt with des3 */
664
sess_crypt_blob(&data_out, data_in, &sess_key, 0);
666
/* 4 Byte length, 4 Byte version */
667
length = IVAL(data_out.data, 0);
668
version = IVAL(data_out.data, 4);
670
if (length > data_in->length - 8) {
671
DEBUG(0,("decrypt_trustdom_secret: invalid length (%d)\n", length));
676
DEBUG(0,("decrypt_trustdom_secret: unknown version number (%d)\n", version));
680
rpcstr_pull(cleartextpwd, data_out.data + 8, sizeof(fstring), length, 0 );
682
#ifdef DEBUG_PASSWORD
683
DEBUG(100,("decrypt_trustdom_secret: length is: %d, version is: %d, password is: %s\n",
684
length, version, cleartextpwd));
687
data_blob_free(&data_out);
688
data_blob_free(&sess_key);
690
return SMB_STRDUP(cleartextpwd);
694
/* encode a wkssvc_PasswordBuffer:
696
* similar to samr_CryptPasswordEx. Different: 8byte confounder (instead of
697
* 16byte), confounder in front of the 516 byte buffer (instead of after that
698
* buffer), calling MD5Update() first with session_key and then with confounder
699
* (vice versa in samr) - Guenther */
701
void encode_wkssvc_join_password_buffer(TALLOC_CTX *mem_ctx,
703
DATA_BLOB *session_key,
704
struct wkssvc_PasswordBuffer **pwd_buf)
707
struct MD5Context ctx;
708
struct wkssvc_PasswordBuffer *my_pwd_buf = NULL;
709
DATA_BLOB confounded_session_key;
710
int confounder_len = 8;
711
uint8_t confounder[8];
713
my_pwd_buf = talloc_zero(mem_ctx, struct wkssvc_PasswordBuffer);
718
confounded_session_key = data_blob_talloc(mem_ctx, NULL, 16);
720
encode_pw_buffer(buffer, pwd, STR_UNICODE);
722
generate_random_buffer((uint8_t *)confounder, confounder_len);
725
MD5Update(&ctx, session_key->data, session_key->length);
726
MD5Update(&ctx, confounder, confounder_len);
727
MD5Final(confounded_session_key.data, &ctx);
729
SamOEMhashBlob(buffer, 516, &confounded_session_key);
731
memcpy(&my_pwd_buf->data[0], confounder, confounder_len);
732
memcpy(&my_pwd_buf->data[8], buffer, 516);
734
data_blob_free(&confounded_session_key);
736
*pwd_buf = my_pwd_buf;
739
WERROR decode_wkssvc_join_password_buffer(TALLOC_CTX *mem_ctx,
740
struct wkssvc_PasswordBuffer *pwd_buf,
741
DATA_BLOB *session_key,
745
struct MD5Context ctx;
748
DATA_BLOB confounded_session_key;
750
int confounder_len = 8;
751
uint8_t confounder[8];
756
return WERR_BAD_PASSWORD;
759
if (session_key->length != 16) {
760
DEBUG(10,("invalid session key\n"));
761
return WERR_BAD_PASSWORD;
764
confounded_session_key = data_blob_talloc(mem_ctx, NULL, 16);
766
memcpy(&confounder, &pwd_buf->data[0], confounder_len);
767
memcpy(&buffer, &pwd_buf->data[8], 516);
770
MD5Update(&ctx, session_key->data, session_key->length);
771
MD5Update(&ctx, confounder, confounder_len);
772
MD5Final(confounded_session_key.data, &ctx);
774
SamOEMhashBlob(buffer, 516, &confounded_session_key);
776
if (!decode_pw_buffer(mem_ctx, buffer, pwd, &pwd_len, STR_UNICODE)) {
777
data_blob_free(&confounded_session_key);
778
return WERR_BAD_PASSWORD;
781
data_blob_free(&confounded_session_key);
786
DATA_BLOB decrypt_drsuapi_blob(TALLOC_CTX *mem_ctx,
787
const DATA_BLOB *session_key,
790
const DATA_BLOB *buffer)
792
DATA_BLOB confounder;
793
DATA_BLOB enc_buffer;
795
struct MD5Context md5;
796
uint8_t _enc_key[16];
799
DATA_BLOB dec_buffer;
801
uint32_t crc32_given;
803
DATA_BLOB checked_buffer;
805
DATA_BLOB plain_buffer;
808
* the combination "c[3] s[1] e[1] d[0]..."
809
* was successful!!!!!!!!!!!!!!!!!!!!!!!!!!
813
* the first 16 bytes at the beginning are the confounder
814
* followed by the 4 byte crc32 checksum
816
if (buffer->length < 20) {
817
return data_blob_const(NULL, 0);
819
confounder = data_blob_const(buffer->data, 16);
820
enc_buffer = data_blob_const(buffer->data + 16, buffer->length - 16);
823
* build the encryption key md5 over the session key followed
826
* here the gensec session key is used and
827
* not the dcerpc ncacn_ip_tcp "SystemLibraryDTC" key!
829
enc_key = data_blob_const(_enc_key, sizeof(_enc_key));
831
MD5Update(&md5, session_key->data, session_key->length);
832
MD5Update(&md5, confounder.data, confounder.length);
833
MD5Final(enc_key.data, &md5);
836
* copy the encrypted buffer part and
837
* decrypt it using the created encryption key using arcfour
839
dec_buffer = data_blob_talloc(mem_ctx, enc_buffer.data, enc_buffer.length);
840
if (!dec_buffer.data) {
841
return data_blob_const(NULL, 0);
843
SamOEMhashBlob(dec_buffer.data, dec_buffer.length, &enc_key);
846
* the first 4 byte are the crc32 checksum
847
* of the remaining bytes
849
crc32_given = IVAL(dec_buffer.data, 0);
850
crc32_calc = crc32_calc_buffer(dec_buffer.data + 4 , dec_buffer.length - 4);
851
if (crc32_given != crc32_calc) {
852
DEBUG(1,("CRC32: given[0x%08X] calc[0x%08X]\n",
853
crc32_given, crc32_calc));
854
return data_blob_const(NULL, 0);
856
checked_buffer = data_blob_talloc(mem_ctx, dec_buffer.data + 4, dec_buffer.length - 4);
857
if (!checked_buffer.data) {
858
return data_blob_const(NULL, 0);
862
* some attributes seem to be in a usable form after this decryption
863
* (supplementalCredentials, priorValue, currentValue, trustAuthOutgoing,
864
* trustAuthIncoming, initialAuthOutgoing, initialAuthIncoming)
865
* At least supplementalCredentials contains plaintext
866
* like "Primary:Kerberos" (in unicode form)
868
* some attributes seem to have some additional encryption
869
* dBCSPwd, unicodePwd, ntPwdHistory, lmPwdHistory
871
* it's the sam_rid_crypt() function, as the value is constant,
872
* so it doesn't depend on sessionkeys.
875
uint32_t i, num_hashes;
877
if ((checked_buffer.length % 16) != 0) {
878
return data_blob_const(NULL, 0);
881
plain_buffer = data_blob_talloc(mem_ctx, checked_buffer.data, checked_buffer.length);
882
if (!plain_buffer.data) {
883
return data_blob_const(NULL, 0);
886
num_hashes = plain_buffer.length / 16;
887
for (i = 0; i < num_hashes; i++) {
888
uint32_t offset = i * 16;
889
sam_pwd_hash(rid, checked_buffer.data + offset, plain_buffer.data + offset, 0);
892
plain_buffer = checked_buffer;