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-rw-r--r--source4/libcli/util/smbencrypt.c418
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diff --git a/source4/libcli/util/smbencrypt.c b/source4/libcli/util/smbencrypt.c
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+/*
+ Unix SMB/CIFS implementation.
+ SMB parameters and setup
+ Copyright (C) Andrew Tridgell 1992-1998
+ Modified by Jeremy Allison 1995.
+ Copyright (C) Jeremy Allison 1995-2000.
+ Copyright (C) Luke Kennethc Casson Leighton 1996-2000.
+ Copyright (C) Andrew Bartlett <abartlet@samba.org> 2002-2003
+
+ 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"
+#include "byteorder.h"
+
+/*
+ This implements the X/Open SMB password encryption
+ It takes a password ('unix' string), a 8 byte "crypt key"
+ and puts 24 bytes of encrypted password into p24 */
+void SMBencrypt(const char *passwd, const uchar *c8, uchar p24[24])
+{
+ uchar p21[21];
+
+ memset(p21,'\0',21);
+ E_deshash(passwd, p21);
+
+ SMBOWFencrypt(p21, c8, p24);
+
+#ifdef DEBUG_PASSWORD
+ DEBUG(100,("SMBencrypt: lm#, challenge, response\n"));
+ dump_data(100, (char *)p21, 16);
+ dump_data(100, (const char *)c8, 8);
+ dump_data(100, (char *)p24, 24);
+#endif
+}
+
+/**
+ * Creates the MD4 Hash of the users password in NT UNICODE.
+ * @param passwd password in 'unix' charset.
+ * @param p16 return password hashed with md4, caller allocated 16 byte buffer
+ */
+
+void E_md4hash(const char *passwd, uchar p16[16])
+{
+ int len;
+ smb_ucs2_t wpwd[129];
+
+ /* Password must be converted to NT unicode - null terminated. */
+ push_ucs2(NULL, wpwd, (const char *)passwd, 256, STR_UNICODE|STR_NOALIGN|STR_TERMINATE);
+ /* Calculate length in bytes */
+ len = strlen_w(wpwd) * sizeof(int16);
+
+ mdfour(p16, (unsigned char *)wpwd, len);
+ ZERO_STRUCT(wpwd);
+}
+
+/**
+ * Creates the DES forward-only Hash of the users password in DOS ASCII charset
+ * @param passwd password in 'unix' charset.
+ * @param p16 return password hashed with DES, caller allocated 16 byte buffer
+ */
+
+void E_deshash(const char *passwd, uchar p16[16])
+{
+ fstring dospwd;
+ ZERO_STRUCT(dospwd);
+ ZERO_STRUCTP(p16);
+
+ /* Password must be converted to DOS charset - null terminated, uppercase. */
+ push_ascii(dospwd, (const char *)passwd, sizeof(dospwd), STR_UPPER|STR_TERMINATE);
+
+ /* Only the fisrt 14 chars are considered, password need not be null terminated. */
+ E_P16(dospwd, p16);
+
+ ZERO_STRUCT(dospwd);
+}
+
+/**
+ * Creates the MD4 and DES (LM) Hash of the users password.
+ * MD4 is of the NT Unicode, DES is of the DOS UPPERCASE password.
+ * @param passwd password in 'unix' charset.
+ * @param nt_p16 return password hashed with md4, caller allocated 16 byte buffer
+ * @param p16 return password hashed with des, caller allocated 16 byte buffer
+ */
+
+/* Does both the NT and LM owfs of a user's password */
+void nt_lm_owf_gen(const char *pwd, uchar nt_p16[16], uchar p16[16])
+{
+ /* Calculate the MD4 hash (NT compatible) of the password */
+ memset(nt_p16, '\0', 16);
+ E_md4hash(pwd, nt_p16);
+
+#ifdef DEBUG_PASSWORD
+ DEBUG(100,("nt_lm_owf_gen: pwd, nt#\n"));
+ dump_data(120, pwd, strlen(pwd));
+ dump_data(100, (char *)nt_p16, 16);
+#endif
+
+ E_deshash(pwd, (uchar *)p16);
+
+#ifdef DEBUG_PASSWORD
+ DEBUG(100,("nt_lm_owf_gen: pwd, lm#\n"));
+ dump_data(120, pwd, strlen(pwd));
+ dump_data(100, (char *)p16, 16);
+#endif
+}
+
+/* Does both the NTLMv2 owfs of a user's password */
+BOOL ntv2_owf_gen(const uchar owf[16],
+ const char *user_in, const char *domain_in, uchar kr_buf[16])
+{
+ smb_ucs2_t *user;
+ smb_ucs2_t *domain;
+
+ size_t user_byte_len;
+ size_t domain_byte_len;
+
+ HMACMD5Context ctx;
+
+ user_byte_len = push_ucs2_allocate(&user, user_in);
+ if (user_byte_len == (size_t)-1) {
+ DEBUG(0, ("push_uss2_allocate() for user returned -1 (probably malloc() failure)\n"));
+ return False;
+ }
+
+ domain_byte_len = push_ucs2_allocate(&domain, domain_in);
+ if (domain_byte_len == (size_t)-1) {
+ DEBUG(0, ("push_uss2_allocate() for domain returned -1 (probably malloc() failure)\n"));
+ return False;
+ }
+
+ strupper_w(user);
+ strupper_w(domain);
+
+ SMB_ASSERT(user_byte_len >= 2);
+ SMB_ASSERT(domain_byte_len >= 2);
+
+ /* We don't want null termination */
+ user_byte_len = user_byte_len - 2;
+ domain_byte_len = domain_byte_len - 2;
+
+ hmac_md5_init_limK_to_64(owf, 16, &ctx);
+ hmac_md5_update((const unsigned char *)user, user_byte_len, &ctx);
+ hmac_md5_update((const unsigned char *)domain, domain_byte_len, &ctx);
+ hmac_md5_final(kr_buf, &ctx);
+
+#ifdef DEBUG_PASSWORD
+ DEBUG(100, ("ntv2_owf_gen: user, domain, owfkey, kr\n"));
+ dump_data(100, (const char *)user, user_byte_len);
+ dump_data(100, (const char *)domain, domain_byte_len);
+ dump_data(100, owf, 16);
+ dump_data(100, kr_buf, 16);
+#endif
+
+ SAFE_FREE(user);
+ SAFE_FREE(domain);
+ return True;
+}
+
+/* Does the des encryption from the NT or LM MD4 hash. */
+void SMBOWFencrypt(const uchar passwd[16], const uchar *c8, uchar p24[24])
+{
+ uchar p21[21];
+
+ ZERO_STRUCT(p21);
+
+ memcpy(p21, passwd, 16);
+ E_P24(p21, c8, p24);
+}
+
+/* Does the des encryption from the FIRST 8 BYTES of the NT or LM MD4 hash. */
+void NTLMSSPOWFencrypt(const uchar passwd[8], const uchar *ntlmchalresp, uchar p24[24])
+{
+ uchar p21[21];
+
+ memset(p21,'\0',21);
+ memcpy(p21, passwd, 8);
+ memset(p21 + 8, 0xbd, 8);
+
+ E_P24(p21, ntlmchalresp, p24);
+#ifdef DEBUG_PASSWORD
+ DEBUG(100,("NTLMSSPOWFencrypt: p21, c8, p24\n"));
+ dump_data(100, (char *)p21, 21);
+ dump_data(100, (const char *)ntlmchalresp, 8);
+ dump_data(100, (char *)p24, 24);
+#endif
+}
+
+
+/* Does the NT MD4 hash then des encryption. */
+
+void SMBNTencrypt(const char *passwd, uchar *c8, uchar *p24)
+{
+ uchar p21[21];
+
+ memset(p21,'\0',21);
+
+ E_md4hash(passwd, p21);
+ SMBOWFencrypt(p21, c8, p24);
+
+#ifdef DEBUG_PASSWORD
+ DEBUG(100,("SMBNTencrypt: nt#, challenge, response\n"));
+ dump_data(100, (char *)p21, 16);
+ dump_data(100, (char *)c8, 8);
+ dump_data(100, (char *)p24, 24);
+#endif
+}
+
+BOOL make_oem_passwd_hash(char data[516], const char *passwd, uchar old_pw_hash[16], BOOL unicode)
+{
+ int new_pw_len = strlen(passwd) * (unicode ? 2 : 1);
+
+ if (new_pw_len > 512)
+ {
+ DEBUG(0,("make_oem_passwd_hash: new password is too long.\n"));
+ return False;
+ }
+
+ /*
+ * Now setup the data area.
+ * We need to generate a random fill
+ * for this area to make it harder to
+ * decrypt. JRA.
+ */
+ generate_random_buffer((unsigned char *)data, 516, False);
+ push_string(NULL, &data[512 - new_pw_len], passwd, new_pw_len,
+ STR_NOALIGN | (unicode?STR_UNICODE:STR_ASCII));
+ SIVAL(data, 512, new_pw_len);
+
+#ifdef DEBUG_PASSWORD
+ DEBUG(100,("make_oem_passwd_hash\n"));
+ dump_data(100, data, 516);
+#endif
+ SamOEMhash( (unsigned char *)data, (unsigned char *)old_pw_hash, 516);
+
+ return True;
+}
+
+/* Does the md5 encryption from the NT hash for NTLMv2. */
+void SMBOWFencrypt_ntv2(const uchar kr[16],
+ const DATA_BLOB srv_chal,
+ const DATA_BLOB cli_chal,
+ uchar resp_buf[16])
+{
+ HMACMD5Context ctx;
+
+ hmac_md5_init_limK_to_64(kr, 16, &ctx);
+ hmac_md5_update(srv_chal.data, srv_chal.length, &ctx);
+ hmac_md5_update(cli_chal.data, cli_chal.length, &ctx);
+ hmac_md5_final(resp_buf, &ctx);
+
+#ifdef DEBUG_PASSWORD
+ DEBUG(100, ("SMBOWFencrypt_ntv2: srv_chal, cli_chal, resp_buf\n"));
+ dump_data(100, srv_chal.data, srv_chal.length);
+ dump_data(100, cli_chal.data, cli_chal.length);
+ dump_data(100, resp_buf, 16);
+#endif
+}
+
+void SMBsesskeygen_ntv2(const uchar kr[16],
+ const uchar * nt_resp, uint8 sess_key[16])
+{
+ HMACMD5Context ctx;
+
+ hmac_md5_init_limK_to_64(kr, 16, &ctx);
+ hmac_md5_update(nt_resp, 16, &ctx);
+ hmac_md5_final((unsigned char *)sess_key, &ctx);
+
+#ifdef DEBUG_PASSWORD
+ DEBUG(100, ("SMBsesskeygen_ntv2:\n"));
+ dump_data(100, sess_key, 16);
+#endif
+}
+
+void SMBsesskeygen_ntv1(const uchar kr[16],
+ const uchar * nt_resp, uint8 sess_key[16])
+{
+ mdfour((unsigned char *)sess_key, kr, 16);
+
+#ifdef DEBUG_PASSWORD
+ DEBUG(100, ("SMBsesskeygen_ntv1:\n"));
+ dump_data(100, sess_key, 16);
+#endif
+}
+
+DATA_BLOB NTLMv2_generate_response(uchar ntlm_v2_hash[16],
+ DATA_BLOB server_chal, size_t client_chal_length)
+{
+ uchar ntlmv2_response[16];
+ DATA_BLOB ntlmv2_client_data;
+ DATA_BLOB final_response;
+
+ /* NTLMv2 */
+
+ /* We also get to specify some random data */
+ ntlmv2_client_data = data_blob(NULL, client_chal_length);
+ generate_random_buffer(ntlmv2_client_data.data, ntlmv2_client_data.length, False);
+
+ /* Given that data, and the challenge from the server, generate a response */
+ SMBOWFencrypt_ntv2(ntlm_v2_hash, server_chal, ntlmv2_client_data, ntlmv2_response);
+
+ /* put it into nt_response, for the code below to put into the packet */
+ final_response = data_blob(NULL, ntlmv2_client_data.length + sizeof(ntlmv2_response));
+ memcpy(final_response.data, ntlmv2_response, sizeof(ntlmv2_response));
+ /* after the first 16 bytes is the random data we generated above, so the server can verify us with it */
+ memcpy(final_response.data + sizeof(ntlmv2_response), ntlmv2_client_data.data, ntlmv2_client_data.length);
+ data_blob_free(&ntlmv2_client_data);
+
+ return final_response;
+}
+
+BOOL SMBNTLMv2encrypt(const char *user, const char *domain, const char *password,
+ const DATA_BLOB server_chal,
+ DATA_BLOB *lm_response, DATA_BLOB *nt_response,
+ DATA_BLOB *session_key)
+{
+ uchar nt_hash[16];
+ uchar ntlm_v2_hash[16];
+ E_md4hash(password, nt_hash);
+
+ /* We don't use the NT# directly. Instead we use it mashed up with
+ the username and domain.
+ This prevents username swapping during the auth exchange
+ */
+ if (!ntv2_owf_gen(nt_hash, user, domain, ntlm_v2_hash)) {
+ return False;
+ }
+
+ *nt_response = NTLMv2_generate_response(ntlm_v2_hash, server_chal, 64 /* pick a number, > 8 */);
+
+ /* LMv2 */
+
+ *lm_response = NTLMv2_generate_response(ntlm_v2_hash, server_chal, 8);
+
+ *session_key = data_blob(NULL, 16);
+
+ /* The NTLMv2 calculations also provide a session key, for signing etc later */
+ /* use only the first 16 bytes of nt_response for session key */
+ SMBsesskeygen_ntv2(ntlm_v2_hash, nt_response->data, session_key->data);
+
+ return True;
+}
+
+/***********************************************************
+ encode a password buffer. The caller gets to figure out
+ what to put in it.
+************************************************************/
+BOOL encode_pw_buffer(char buffer[516], char *new_pw, int new_pw_length)
+{
+ generate_random_buffer((unsigned char *)buffer, 516, True);
+
+ memcpy(&buffer[512 - new_pw_length], new_pw, new_pw_length);
+
+ /*
+ * The length of the new password is in the last 4 bytes of
+ * the data buffer.
+ */
+ SIVAL(buffer, 512, new_pw_length);
+
+ return True;
+}
+
+/***********************************************************
+ decode a password buffer
+ *new_pw_len is the length in bytes of the possibly mulitbyte
+ returned password including termination.
+************************************************************/
+BOOL decode_pw_buffer(char in_buffer[516], char *new_pwrd,
+ int new_pwrd_size, uint32 *new_pw_len)
+{
+ int byte_len=0;
+
+ /*
+ Warning !!! : This function is called from some rpc call.
+ The password IN the buffer is a UNICODE string.
+ The password IN new_pwrd is an ASCII string
+ If you reuse that code somewhere else check first.
+ */
+
+ /* The length of the new password is in the last 4 bytes of the data buffer. */
+
+ byte_len = IVAL(in_buffer, 512);
+
+#ifdef DEBUG_PASSWORD
+ dump_data(100, in_buffer, 516);
+#endif
+
+ /* Password cannot be longer than 128 characters */
+ if ( (byte_len < 0) || (byte_len > new_pwrd_size - 1)) {
+ DEBUG(0, ("decode_pw_buffer: incorrect password length (%d).\n", byte_len));
+ DEBUG(0, ("decode_pw_buffer: check that 'encrypt passwords = yes'\n"));
+ return False;
+ }
+
+ /* decode into the return buffer. Buffer must be a pstring */
+ *new_pw_len = pull_string(NULL, new_pwrd, &in_buffer[512 - byte_len], new_pwrd_size, byte_len, STR_UNICODE);
+
+#ifdef DEBUG_PASSWORD
+ DEBUG(100,("decode_pw_buffer: new_pwrd: "));
+ dump_data(100, (char *)new_pwrd, *new_pw_len);
+ DEBUG(100,("multibyte len:%d\n", *new_pw_len));
+ DEBUG(100,("original char len:%d\n", byte_len/2));
+#endif
+
+ return True;
+}