Unix SMB/Netbios implementation.
Version 1.9.
SMB parameters and setup
- Copyright (C) Andrew Tridgell 1992-1997
+ 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.
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
*/
#include "includes.h"
-#include "md4.h"
-
-extern int DEBUGLEVEL;
-
#include "byteorder.h"
-void E1(uchar *k, uchar *d, uchar *out)
+/*
+ This implements the X/Open SMB password encryption
+ It takes a password, a 8 byte "crypt key" and puts 24 bytes of
+ encrypted password into p24 */
+void SMBencrypt(const uchar *passwd, const uchar *c8, uchar *p24)
{
- smbdes(out, d, k);
+ uchar p14[15], p21[21];
+
+ memset(p21,'\0',21);
+ memset(p14,'\0',14);
+ StrnCpy((char *)p14,(const char *)passwd,14);
+
+ strupper((char *)p14);
+ E_P16(p14, 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.
+ */
-void E_P16(uchar *p14,uchar *p16)
+void E_md4hash(const uchar *passwd, uchar *p16)
{
- /* the following constant makes us compatible with other
- implementations. Note that publishing this constant does not reduce the
- security of the encryption mechanism */
- uchar sp8[] = {0x4b, 0x47, 0x53, 0x21, 0x40, 0x23, 0x24, 0x25};
- E1(p14, sp8, p16);
- E1(p14+7, sp8, p16+8);
+ int len;
+ smb_ucs2_t wpwd[129];
+
+ /* Password cannot be longer than 128 characters */
+ len = strlen((const char *)passwd);
+ if(len > 128)
+ len = 128;
+ /* 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);
}
-void E_P24(uchar *p21, uchar *c8, uchar *p24)
+/* 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])
{
- E1(p21, c8, p24);
- E1(p21+7, c8, p24+8);
- E1(p21+14, c8, p24+16);
-}
+ char passwd[514];
+ memset(passwd,'\0',514);
+ safe_strcpy( passwd, pwd, sizeof(passwd)-1);
-/*
- This implements the X/Open SMB password encryption
- It takes a password, a 8 byte "crypt key" and puts 24 bytes of
- encrypted password into p24 */
-void SMBencrypt(uchar *passwd, uchar *c8, uchar *p24)
-{
- uchar p14[15], p21[21];
+ /* Calculate the MD4 hash (NT compatible) of the password */
+ memset(nt_p16, '\0', 16);
+ E_md4hash((uchar *)passwd, nt_p16);
+
+#ifdef DEBUG_PASSWORD
+ DEBUG(100,("nt_lm_owf_gen: pwd, nt#\n"));
+ dump_data(120, passwd, strlen(passwd));
+ dump_data(100, (char *)nt_p16, 16);
+#endif
- memset(p21,'\0',21);
- memset(p14,'\0',14);
- StrnCpy((char *)p14,(char *)passwd,14);
+ /* Mangle the passwords into Lanman format */
+ passwd[14] = '\0';
+ strupper(passwd);
- strupper((char *)p14);
- E_P16(p14, p21);
- E_P24(p21, c8, p24);
+ /* Calculate the SMB (lanman) hash functions of the password */
+
+ memset(p16, '\0', 16);
+ E_P16((uchar *) passwd, (uchar *)p16);
+
+#ifdef DEBUG_PASSWORD
+ DEBUG(100,("nt_lm_owf_gen: pwd, lm#\n"));
+ dump_data(120, passwd, strlen(passwd));
+ dump_data(100, (char *)p16, 16);
+#endif
+ /* clear out local copy of user's password (just being paranoid). */
+ memset(passwd, '\0', sizeof(passwd));
}
-/* Routines for Windows NT MD4 Hash functions. */
-static int _my_wcslen(int16 *str)
+/* Does both the NTLMv2 owfs of a user's password */
+void ntv2_owf_gen(const uchar owf[16],
+ const char *user_n, const char *domain_n, uchar kr_buf[16])
{
- int len = 0;
- while(*str++ != 0)
- len++;
- return len;
+ pstring user_u;
+ pstring dom_u;
+ HMACMD5Context ctx;
+
+ int user_l = strlen(user_n);
+ int domain_l = strlen(domain_n);
+
+ push_ucs2(NULL, user_u, user_n, (user_l+1)*2, STR_UNICODE|STR_NOALIGN|STR_TERMINATE|STR_UPPER);
+ push_ucs2(NULL, dom_u, domain_n, (domain_l+1)*2, STR_UNICODE|STR_NOALIGN|STR_TERMINATE|STR_UPPER);
+
+ hmac_md5_init_limK_to_64(owf, 16, &ctx);
+ hmac_md5_update((const unsigned char *)user_u, user_l * 2, &ctx);
+ hmac_md5_update((const unsigned char *)dom_u, domain_l * 2, &ctx);
+ hmac_md5_final(kr_buf, &ctx);
+
+#ifdef DEBUG_PASSWORD
+ DEBUG(100, ("ntv2_owf_gen: user, domain, owfkey, kr\n"));
+ dump_data(100, user_u, user_l * 2);
+ dump_data(100, dom_u, domain_l * 2);
+ dump_data(100, owf, 16);
+ dump_data(100, kr_buf, 16);
+#endif
}
-/*
- * Convert a string into an NT UNICODE string.
- * Note that regardless of processor type
- * this must be in intel (little-endian)
- * format.
- */
-
-static int _my_mbstowcs(int16 *dst, uchar *src, int len)
+/* Does the des encryption from the NT or LM MD4 hash. */
+void SMBOWFencrypt(const uchar passwd[16], const uchar *c8, uchar p24[24])
{
- int i;
- int16 val;
+ uchar p21[21];
- for(i = 0; i < len; i++) {
- val = *src;
- SSVAL(dst,0,val);
- dst++;
- src++;
- if(val == 0)
- break;
- }
- return i;
+ memset(p21,'\0',21);
+
+ memcpy(p21, passwd, 16);
+ E_P24(p21, c8, p24);
}
-/*
- * Creates the MD4 Hash of the users password in NT UNICODE.
- */
-
-void E_md4hash(uchar *passwd, uchar *p16)
+/* 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])
{
- int i, len;
- int16 wpwd[129];
- MDstruct MD;
-
- /* Password cannot be longer than 128 characters */
- len = strlen((char *)passwd);
- if(len > 128)
- len = 128;
- /* Password must be converted to NT unicode */
- _my_mbstowcs( wpwd, passwd, len);
- wpwd[len] = 0; /* Ensure string is null terminated */
- /* Calculate length in bytes */
- len = _my_wcslen(wpwd) * sizeof(int16);
+ uchar p21[21];
- MDbegin(&MD);
- for(i = 0; i + 64 <= len; i += 64)
- MDupdate(&MD,wpwd + (i/2), 512);
- MDupdate(&MD,wpwd + (i/2),(len-i)*8);
- SIVAL(p16,0,MD.buffer[0]);
- SIVAL(p16,4,MD.buffer[1]);
- SIVAL(p16,8,MD.buffer[2]);
- SIVAL(p16,12,MD.buffer[3]);
+ 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(uchar *passwd, uchar *c8, uchar *p24)
+void SMBNTencrypt(const uchar *passwd, uchar *c8, uchar *p24)
{
uchar p21[21];
memset(p21,'\0',21);
E_md4hash(passwd, p21);
- E_P24(p21, c8, p24);
+ 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,
+ char 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((unsigned char *)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
}
+/***********************************************************
+ encode a password buffer
+************************************************************/
+BOOL encode_pw_buffer(char buffer[516], const char *new_pass,
+ int new_pw_len, BOOL nt_pass_set)
+{
+ generate_random_buffer((unsigned char *)buffer, 516, True);
+
+ if (nt_pass_set) {
+ new_pw_len *= 2;
+ push_ucs2(NULL, &buffer[512 - new_pw_len], new_pass,
+ new_pw_len, 0);
+ } else {
+ push_ascii(&buffer[512 - new_pw_len], new_pass,
+ new_pw_len, 0);
+ }
+
+ /*
+ * The length of the new password is in the last 4 bytes of
+ * the data buffer.
+ */
+ SIVAL(buffer, 512, new_pw_len);
+
+ 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;
+
+}
+
+/* Calculate the NT owfs of a user's password */
+void nt_owf_genW(const UNISTR2 *pwd, uchar nt_p16[16])
+{
+ char buf[512];
+ int i;
+
+ for (i = 0; i < MIN(pwd->uni_str_len, sizeof(buf) / 2); i++)
+ {
+ SIVAL(buf, i * 2, pwd->buffer[i]);
+ }
+ /* Calculate the MD4 hash (NT compatible) of the password */
+ mdfour(nt_p16, (const unsigned char *)buf, pwd->uni_str_len * 2);
+
+ /* clear out local copy of user's password (just being paranoid). */
+ ZERO_STRUCT(buf);
+}
git.samba.org / ira / wip.git / blobdiff