1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
|
/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
MA 02111-1301, USA */
/* password checking routines */
/*****************************************************************************
The main idea is that no password are sent between client & server on
connection and that no password are saved in mysql in a decodable form.
On connection a random string is generated and sent to the client.
The client generates a new string with a random generator inited with
the hash values from the password and the sent string.
This 'check' string is sent to the server where it is compared with
a string generated from the stored hash_value of the password and the
random string.
The password is saved (in user.password) by using the PASSWORD() function in
mysql.
Example:
update user set password=PASSWORD("hello") where user="test"
This saves a hashed number as a string in the password field.
*****************************************************************************/
#include <my_global.h>
#include <my_sys.h>
#include <m_string.h>
#include <sha1.h>
#include "mysql.h"
void randominit(struct rand_struct *rand_st,ulong seed1, ulong seed2)
{ /* For mysql 3.21.# */
#ifdef HAVE_purify
bzero((char*) rand_st,sizeof(*rand_st)); /* Avoid UMC varnings */
#endif
rand_st->max_value= 0x3FFFFFFFL;
rand_st->max_value_dbl=(double) rand_st->max_value;
rand_st->seed1=seed1%rand_st->max_value ;
rand_st->seed2=seed2%rand_st->max_value;
}
static void old_randominit(struct rand_struct *rand_st,ulong seed1)
{ /* For mysql 3.20.# */
rand_st->max_value= 0x01FFFFFFL;
rand_st->max_value_dbl=(double) rand_st->max_value;
seed1%=rand_st->max_value;
rand_st->seed1=seed1 ; rand_st->seed2=seed1/2;
}
double rnd(struct rand_struct *rand_st)
{
rand_st->seed1=(rand_st->seed1*3+rand_st->seed2) % rand_st->max_value;
rand_st->seed2=(rand_st->seed1+rand_st->seed2+33) % rand_st->max_value;
return (((double) rand_st->seed1)/rand_st->max_value_dbl);
}
void hash_password(ulong *result, const char *password, size_t len)
{
register ulong nr=1345345333L, add=7, nr2=0x12345671L;
ulong tmp;
const char *password_end= password + len;
for (; password < password_end; password++)
{
if (*password == ' ' || *password == '\t')
continue; /* skipp space in password */
tmp= (ulong) (uchar) *password;
nr^= (((nr & 63)+add)*tmp)+ (nr << 8);
nr2+=(nr2 << 8) ^ nr;
add+=tmp;
}
result[0]=nr & (((ulong) 1L << 31) -1L); /* Don't use sign bit (str2int) */;
result[1]=nr2 & (((ulong) 1L << 31) -1L);
return;
}
static inline unsigned int char_val(char X)
{
return (uint) (X >= '0' && X <= '9' ? X-'0' :
X >= 'A' && X <= 'Z' ? X-'A'+10 :
X-'a'+10);
}
/*
* Genererate a new message based on message and password
* The same thing is done in client and server and the results are checked.
*/
/* scramble for 4.1 servers
* Code based on php_nysqlnd_scramble function from PHP's mysqlnd extension,
* written by Andrey Hristov (andrey@php.net)
* License: PHP License 3.0
*/
void my_crypt(unsigned char *buffer, const unsigned char *s1, const unsigned char *s2, size_t len)
{
const unsigned char *s1_end= s1 + len;
while (s1 < s1_end) {
*buffer++= *s1++ ^ *s2++;
}
}
void my_scramble_41(const unsigned char *buffer, const char *scramble, const char *password)
{
MYSQL_SHA1_CTX context;
unsigned char sha1[SHA1_MAX_LENGTH];
unsigned char sha2[SHA1_MAX_LENGTH];
/* Phase 1: hash password */
MYSQL_SHA1Init(&context);
MYSQL_SHA1Update(&context, (unsigned char *)password, strlen((char *)password));
MYSQL_SHA1Final(sha1, &context);
/* Phase 2: hash sha1 */
MYSQL_SHA1Init(&context);
MYSQL_SHA1Update(&context, (unsigned char*)sha1, SHA1_MAX_LENGTH);
MYSQL_SHA1Final(sha2, &context);
/* Phase 3: hash scramble + sha2 */
MYSQL_SHA1Init(&context);
MYSQL_SHA1Update(&context, (unsigned char *)scramble, SCRAMBLE_LENGTH);
MYSQL_SHA1Update(&context, (unsigned char*)sha2, SHA1_MAX_LENGTH);
MYSQL_SHA1Final((unsigned char *)buffer, &context);
/* let's crypt buffer now */
my_crypt((uchar *)buffer, (const unsigned char *)buffer, (const unsigned char *)sha1, SHA1_MAX_LENGTH);
}
/* }}} */
void make_scrambled_password(char *to,const char *password)
{
ulong hash_res[2];
hash_password(hash_res,password, strlen(password));
sprintf(to,"%08lx%08lx",hash_res[0],hash_res[1]);
}
/*
** This code assumes that len(password) is divideable with 8 and that
** res is big enough (2 in mysql)
*/
void get_salt_from_password(ulong *res,const char *password)
{
res[0]=res[1]=0;
if (password)
{
while (*password)
{
ulong val=0;
uint i;
for (i=0 ; i < 8 ; i++)
val=(val << 4)+char_val(*password++);
*res++=val;
}
}
return;
}
void make_password_from_salt(char *to, ulong *hash_res)
{
sprintf(to,"%08lx%08lx",hash_res[0],hash_res[1]);
}
/*
* Genererate a new message based on message and password
* The same thing is done in client and server and the results are checked.
*/
char *scramble_323(char *to, const char *message, const char *password)
{
struct rand_struct rand_st;
ulong hash_pass[2], hash_message[2];
if (password && password[0])
{
char extra, *to_start=to;
const char *end_scramble323= message + SCRAMBLE_LENGTH_323;
hash_password(hash_pass,password, (uint) strlen(password));
/* Don't use strlen, could be > SCRAMBLE_LENGTH_323 ! */
hash_password(hash_message, message, SCRAMBLE_LENGTH_323);
randominit(&rand_st, hash_pass[0] ^ hash_message[0],
hash_pass[1] ^ hash_message[1]);
for (; message < end_scramble323; message++)
*to++= (char) (floor(rnd(&rand_st) * 31) + 64);
extra=(char) (floor(rnd(&rand_st) * 31));
while (to_start != to)
*(to_start++)^= extra;
}
*to= 0;
return to;
}
my_bool check_scramble(const char *scrambled, const char *message,
ulong *hash_pass, my_bool old_ver)
{
struct rand_struct rand_st;
ulong hash_message[2];
char buff[16],*to,extra; /* Big enough for check */
const char *pos;
hash_password(hash_message,message, strlen(message));
if (old_ver)
old_randominit(&rand_st,hash_pass[0] ^ hash_message[0]);
else
randominit(&rand_st,hash_pass[0] ^ hash_message[0],
hash_pass[1] ^ hash_message[1]);
to=buff;
for (pos=scrambled ; *pos ; pos++)
*to++=(char) (floor(rnd(&rand_st)*31)+64);
if (old_ver)
extra=0;
else
extra=(char) (floor(rnd(&rand_st)*31));
to=buff;
while (*scrambled)
{
if (*scrambled++ != (char) (*to++ ^ extra))
return 1; /* Wrong password */
}
return 0;
}
|
