--- /dev/null
+/*
+ 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
+
+ Returns False if password must have been truncated to create LM hash
+*/
+BOOL SMBencrypt(const char *passwd, const uchar *c8, uchar p24[24])
+{
+ BOOL ret;
+ uchar p21[21];
+
+ memset(p21,'\0',21);
+ ret = E_deshash(passwd, p21);
+
+ SMBOWFencrypt(p21, c8, p24);
+
+#ifdef DEBUG_PASSWORD
+ DEBUG(100,("SMBencrypt: lm#, challenge, response\n"));
+ dump_data(100, (const char *)p21, 16);
+ dump_data(100, (const char *)c8, 8);
+ dump_data(100, (const char *)p24, 24);
+#endif
+
+ return ret;
+}
+
+/**
+ * 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 MD5 Hash of a combination of 16 byte salt and 16 byte NT hash.
+ * @param 16 byte salt.
+ * @param 16 byte NT hash.
+ * @param 16 byte return hashed with md5, caller allocated 16 byte buffer
+ */
+
+void E_md5hash(const uchar salt[16], const uchar nthash[16], uchar hash_out[16])
+{
+ struct MD5Context tctx;
+ uchar array[32];
+
+ memset(hash_out, '\0', 16);
+ memcpy(array, salt, 16);
+ memcpy(&array[16], nthash, 16);
+ MD5Init(&tctx);
+ MD5Update(&tctx, array, 32);
+ MD5Final(hash_out, &tctx);
+}
+
+/**
+ * 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
+ * @return False if password was > 14 characters, and therefore may be incorrect, otherwise True
+ * @note p16 is filled in regardless
+ */
+
+BOOL E_deshash(const char *passwd, uchar p16[16])
+{
+ BOOL ret = True;
+ fstring dospwd;
+ ZERO_STRUCT(dospwd);
+
+ /* Password must be converted to DOS charset - null terminated, uppercase. */
+ push_ascii(dospwd, passwd, sizeof(dospwd), STR_UPPER|STR_TERMINATE);
+
+ /* Only the fisrt 14 chars are considered, password need not be null terminated. */
+ E_P16((const unsigned char *)dospwd, p16);
+
+ if (strlen(dospwd) > 14) {
+ ret = False;
+ }
+
+ ZERO_STRUCT(dospwd);
+
+ return ret;
+}
+
+/**
+ * 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,
+ BOOL upper_case_domain, /* Transform the domain into UPPER case */
+ 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);
+
+ if (upper_case_domain)
+ 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, (const char *)owf, 16);
+ dump_data(100, (const char *)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
+}
+
+/* Does the md5 encryption from the Key Response 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, (const char *)srv_chal->data, srv_chal->length);
+ dump_data(100, (const char *)cli_chal->data, cli_chal->length);
+ dump_data(100, (const char *)resp_buf, 16);
+#endif
+}
+
+void SMBsesskeygen_ntv2(const uchar kr[16],
+ const uchar * nt_resp, uint8 sess_key[16])
+{
+ /* a very nice, 128 bit, variable session key */
+
+ 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, (const char *)sess_key, 16);
+#endif
+}
+
+void SMBsesskeygen_ntv1(const uchar kr[16],
+ const uchar * nt_resp, uint8 sess_key[16])
+{
+ /* yes, this session key does not change - yes, this
+ is a problem - but it is 128 bits */
+
+ mdfour((unsigned char *)sess_key, kr, 16);
+
+#ifdef DEBUG_PASSWORD
+ DEBUG(100, ("SMBsesskeygen_ntv1:\n"));
+ dump_data(100, (const char *)sess_key, 16);
+#endif
+}
+
+void SMBsesskeygen_lm_sess_key(const uchar lm_hash[16],
+ const uchar lm_resp[24], /* only uses 8 */
+ uint8 sess_key[16])
+{
+ uchar p24[24];
+ uchar partial_lm_hash[16];
+
+ memcpy(partial_lm_hash, lm_hash, 8);
+ memset(partial_lm_hash + 8, 0xbd, 8);
+
+ SMBOWFencrypt(partial_lm_hash, lm_resp, p24);
+
+ memcpy(sess_key, p24, 16);
+
+#ifdef DEBUG_PASSWORD
+ DEBUG(100, ("SMBsesskeygen_lmv1_jerry:\n"));
+ dump_data(100, (const char *)sess_key, 16);
+#endif
+}
+
+DATA_BLOB NTLMv2_generate_names_blob(const char *hostname,
+ const char *domain)
+{
+ DATA_BLOB names_blob = data_blob(NULL, 0);
+
+ msrpc_gen(&names_blob, "aaa",
+ NTLMSSP_NAME_TYPE_DOMAIN, domain,
+ NTLMSSP_NAME_TYPE_SERVER, hostname,
+ 0, "");
+ return names_blob;
+}
+
+static DATA_BLOB NTLMv2_generate_client_data(const DATA_BLOB *names_blob)
+{
+ uchar client_chal[8];
+ DATA_BLOB response = data_blob(NULL, 0);
+ char long_date[8];
+
+ generate_random_buffer(client_chal, sizeof(client_chal));
+
+ put_long_date(long_date, time(NULL));
+
+ /* See http://www.ubiqx.org/cifs/SMB.html#SMB.8.5 */
+
+ msrpc_gen(&response, "ddbbdb",
+ 0x00000101, /* Header */
+ 0, /* 'Reserved' */
+ long_date, 8, /* Timestamp */
+ client_chal, 8, /* client challenge */
+ 0, /* Unknown */
+ names_blob->data, names_blob->length); /* End of name list */
+
+ return response;
+}
+
+static DATA_BLOB NTLMv2_generate_response(const uchar ntlm_v2_hash[16],
+ const DATA_BLOB *server_chal,
+ const DATA_BLOB *names_blob)
+{
+ uchar ntlmv2_response[16];
+ DATA_BLOB ntlmv2_client_data;
+ DATA_BLOB final_response;
+
+ /* NTLMv2 */
+ /* generate some data to pass into the response function - including
+ the hostname and domain name of the server */
+ ntlmv2_client_data = NTLMv2_generate_client_data(names_blob);
+
+ /* Given that data, and the challenge from the server, generate a response */
+ SMBOWFencrypt_ntv2(ntlm_v2_hash, server_chal, &ntlmv2_client_data, ntlmv2_response);
+
+ final_response = data_blob(NULL, sizeof(ntlmv2_response) + ntlmv2_client_data.length);
+
+ memcpy(final_response.data, ntlmv2_response, sizeof(ntlmv2_response));
+
+ memcpy(final_response.data+sizeof(ntlmv2_response),
+ ntlmv2_client_data.data, ntlmv2_client_data.length);
+
+ data_blob_free(&ntlmv2_client_data);
+
+ return final_response;
+}
+
+static DATA_BLOB LMv2_generate_response(const uchar ntlm_v2_hash[16],
+ const DATA_BLOB *server_chal)
+{
+ uchar lmv2_response[16];
+ DATA_BLOB lmv2_client_data = data_blob(NULL, 8);
+ DATA_BLOB final_response = data_blob(NULL, 24);
+
+ /* LMv2 */
+ /* client-supplied random data */
+ generate_random_buffer(lmv2_client_data.data, lmv2_client_data.length);
+
+ /* Given that data, and the challenge from the server, generate a response */
+ SMBOWFencrypt_ntv2(ntlm_v2_hash, server_chal, &lmv2_client_data, lmv2_response);
+ memcpy(final_response.data, lmv2_response, sizeof(lmv2_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(lmv2_response),
+ lmv2_client_data.data, lmv2_client_data.length);
+
+ data_blob_free(&lmv2_client_data);
+
+ return final_response;
+}
+
+BOOL SMBNTLMv2encrypt(const char *user, const char *domain, const char *password,
+ const DATA_BLOB *server_chal,
+ const DATA_BLOB *names_blob,
+ DATA_BLOB *lm_response, DATA_BLOB *nt_response,
+ DATA_BLOB *user_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, True, ntlm_v2_hash)) {
+ return False;
+ }
+
+ if (nt_response) {
+ *nt_response = NTLMv2_generate_response(ntlm_v2_hash, server_chal,
+ names_blob);
+ if (user_session_key) {
+ *user_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, user_session_key->data);
+ }
+ }
+
+ /* LMv2 */
+
+ if (lm_response) {
+ *lm_response = LMv2_generate_response(ntlm_v2_hash, server_chal);
+ }
+
+ return True;
+}
+
+/***********************************************************
+ encode a password buffer with a unicode password. The buffer
+ is filled with random data to make it harder to attack.
+************************************************************/
+BOOL encode_pw_buffer(uint8 buffer[516], const char *password, int string_flags)
+{
+ uchar new_pw[512];
+ size_t new_pw_len;
+
+ new_pw_len = push_string(NULL, new_pw,
+ password,
+ sizeof(new_pw), string_flags);
+
+ memcpy(&buffer[512 - new_pw_len], new_pw, new_pw_len);
+
+ generate_random_buffer(buffer, 512 - new_pw_len);
+
+ /*
+ * The length of the new password is in the last 4 bytes of
+ * the data buffer.
+ */
+ SIVAL(buffer, 512, new_pw_len);
+ ZERO_STRUCT(new_pw);
+ 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(uint8 in_buffer[516], char *new_pwrd,
+ int new_pwrd_size, uint32 *new_pw_len,
+ int string_flags)
+{
+ int byte_len=0;
+
+ /*
+ Warning !!! : This function is called from some rpc call.
+ The password IN the buffer may be 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, (const char *)in_buffer, 516);
+#endif
+
+ /* Password cannot be longer than the size of the password buffer */
+ if ( (byte_len < 0) || (byte_len > 512)) {
+ 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 length supplied */
+ *new_pw_len = pull_string(NULL, new_pwrd, &in_buffer[512 - byte_len], new_pwrd_size,
+ byte_len, string_flags);
+
+#ifdef DEBUG_PASSWORD
+ DEBUG(100,("decode_pw_buffer: new_pwrd: "));
+ dump_data(100, (const 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;
+}
+
+/***********************************************************
+ Encrypt/Decrypt used for LSA secrets and trusted domain
+ passwords.
+************************************************************/
+
+void sess_crypt_blob(DATA_BLOB *out, const DATA_BLOB *in, const DATA_BLOB *session_key, int forward)
+{
+ int i, k;
+
+ for (i=0,k=0;
+ i<in->length;
+ i += 8, k += 7) {
+ uint8 bin[8], bout[8], key[7];
+
+ memset(bin, 0, 8);
+ memcpy(bin, &in->data[i], MIN(8, in->length-i));
+
+ if (k + 7 > session_key->length) {
+ k = (session_key->length - k);
+ }
+ memcpy(key, &session_key->data[k], 7);
+
+ des_crypt56(bout, bin, key, forward?1:0);
+
+ memcpy(&out->data[i], bout, MIN(8, in->length-i));
+ }
+}
+
+/* Decrypts password-blob with session-key
+ * @param pass password for session-key
+ * @param data_in DATA_BLOB encrypted password
+ *
+ * Returns cleartext password in CH_UNIX
+ * Caller must free the returned string
+ */
+
+char *decrypt_trustdom_secret(const char *pass, DATA_BLOB *data_in)
+{
+ DATA_BLOB data_out, sess_key;
+ uchar nt_hash[16];
+ uint32_t length;
+ uint32_t version;
+ fstring cleartextpwd;
+
+ if (!data_in || !pass)
+ return NULL;
+
+ /* generate md4 password-hash derived from the NT UNICODE password */
+ E_md4hash(pass, nt_hash);
+
+ /* hashed twice with md4 */
+ mdfour(nt_hash, nt_hash, 16);
+
+ /* 16-Byte session-key */
+ sess_key = data_blob(nt_hash, 16);
+ if (sess_key.data == NULL)
+ return NULL;
+
+ data_out = data_blob(NULL, data_in->length);
+ if (data_out.data == NULL)
+ return NULL;
+
+ /* decrypt with des3 */
+ sess_crypt_blob(&data_out, data_in, &sess_key, 0);
+
+ /* 4 Byte length, 4 Byte version */
+ length = IVAL(data_out.data, 0);
+ version = IVAL(data_out.data, 4);
+
+ if (length > data_in->length - 8) {
+ DEBUG(0,("decrypt_trustdom_secret: invalid length (%d)\n", length));
+ return NULL;
+ }
+
+ if (version != 1) {
+ DEBUG(0,("decrypt_trustdom_secret: unknown version number (%d)\n", version));
+ return NULL;
+ }
+
+ rpcstr_pull(cleartextpwd, data_out.data + 8, sizeof(fstring), length, 0 );
+
+#ifdef DEBUG_PASSWORD
+ DEBUG(100,("decrypt_trustdom_secret: length is: %d, version is: %d, password is: %s\n",
+ length, version, cleartextpwd));
+#endif
+
+ data_blob_free(&data_out);
+ data_blob_free(&sess_key);
+
+ return SMB_STRDUP(cleartextpwd);
+
+}
+
projects / samba / blobdiff