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mariadb/sql/sql_acl.cc
unknown 307ed01440 Move latin1 into a separarte file
2003-01-29 17:31:20 +04:00

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/* Copyright (C) 2000 MySQL AB
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/*
The privileges are saved in the following tables:
mysql/user ; super user who are allowed to do almoust anything
mysql/host ; host priviliges. This is used if host is empty in mysql/db.
mysql/db ; database privileges / user
data in tables is sorted according to how many not-wild-cards there is
in the relevant fields. Empty strings comes last.
*/
#include "mysql_priv.h"
#include "sql_acl.h"
#include "hash_filo.h"
#include <m_ctype.h>
#include <stdarg.h>
class acl_entry :public hash_filo_element
{
public:
ulong access;
uint16 length;
char key[1]; // Key will be stored here
};
static byte* acl_entry_get_key(acl_entry *entry,uint *length,
my_bool not_used __attribute__((unused)))
{
*length=(uint) entry->length;
return (byte*) entry->key;
}
#define ACL_KEY_LENGTH (sizeof(long)+NAME_LEN+17)
static DYNAMIC_ARRAY acl_hosts,acl_users,acl_dbs;
static MEM_ROOT mem, memex;
static bool initialized=0;
static bool allow_all_hosts=1;
static HASH acl_check_hosts, column_priv_hash;
static DYNAMIC_ARRAY acl_wild_hosts;
static hash_filo *acl_cache;
static uint grant_version=0;
static uint priv_version=0; /* Version of priv tables. incremented by acl_init */
static ulong get_access(TABLE *form,uint fieldnr);
static int acl_compare(ACL_ACCESS *a,ACL_ACCESS *b);
static ulong get_sort(uint count,...);
static void init_check_host(void);
static ACL_USER *find_acl_user(const char *host, const char *user);
static bool update_user_table(THD *thd, const char *host, const char *user,
const char *new_password);
static void update_hostname(acl_host_and_ip *host, const char *hostname);
static bool compare_hostname(const acl_host_and_ip *host, const char *hostname,
const char *ip);
/*
Read grant privileges from the privilege tables in the 'mysql' database.
SYNOPSIS
acl_init()
thd Thread handler
dont_read_acl_tables Set to 1 if run with --skip-grant
RETURN VALUES
0 ok
1 Could not initialize grant's
*/
my_bool acl_init(THD *org_thd, bool dont_read_acl_tables)
{
THD *thd;
TABLE_LIST tables[3];
TABLE *table;
READ_RECORD read_record_info;
MYSQL_LOCK *lock;
my_bool return_val=1;
DBUG_ENTER("acl_init");
if (!acl_cache)
acl_cache=new hash_filo(ACL_CACHE_SIZE,0,0,
(hash_get_key) acl_entry_get_key,
(hash_free_key) free);
if (dont_read_acl_tables)
{
DBUG_RETURN(0); /* purecov: tested */
}
priv_version++; /* Privileges updated */
/*
To be able to run this from boot, we allocate a temporary THD
*/
if (!(thd=new THD))
DBUG_RETURN(1); /* purecov: inspected */
thd->store_globals();
/* Use passwords according to command line option */
use_old_passwords= opt_old_passwords;
acl_cache->clear(1); // Clear locked hostname cache
thd->db= my_strdup("mysql",MYF(0));
thd->db_length=5; // Safety
bzero((char*) &tables,sizeof(tables));
tables[0].alias=tables[0].real_name=(char*) "host";
tables[1].alias=tables[1].real_name=(char*) "user";
tables[2].alias=tables[2].real_name=(char*) "db";
tables[0].next=tables+1;
tables[1].next=tables+2;
tables[0].lock_type=tables[1].lock_type=tables[2].lock_type=TL_READ;
tables[0].db=tables[1].db=tables[2].db=thd->db;
if (open_tables(thd,tables))
{
sql_print_error("Fatal error: Can't open privilege tables: %s",
thd->net.last_error);
goto end;
}
TABLE *ptr[3]; // Lock tables for quick update
ptr[0]= tables[0].table;
ptr[1]= tables[1].table;
ptr[2]= tables[2].table;
if (!(lock=mysql_lock_tables(thd,ptr,3)))
{
sql_print_error("Fatal error: Can't lock privilege tables: %s",
thd->net.last_error);
goto end;
}
init_sql_alloc(&mem,1024,0);
init_read_record(&read_record_info,thd,table= tables[0].table,NULL,1,0);
VOID(my_init_dynamic_array(&acl_hosts,sizeof(ACL_HOST),20,50));
while (!(read_record_info.read_record(&read_record_info)))
{
ACL_HOST host;
update_hostname(&host.host,get_field(&mem, table,0));
host.db= get_field(&mem, table,1);
host.access= get_access(table,2);
host.access= fix_rights_for_db(host.access);
host.sort= get_sort(2,host.host.hostname,host.db);
#ifndef TO_BE_REMOVED
if (table->fields == 8)
{ // Without grant
if (host.access & CREATE_ACL)
host.access|=REFERENCES_ACL | INDEX_ACL | ALTER_ACL | CREATE_TMP_ACL;
}
#endif
VOID(push_dynamic(&acl_hosts,(gptr) &host));
}
qsort((gptr) dynamic_element(&acl_hosts,0,ACL_HOST*),acl_hosts.elements,
sizeof(ACL_HOST),(qsort_cmp) acl_compare);
end_read_record(&read_record_info);
freeze_size(&acl_hosts);
init_read_record(&read_record_info,thd,table=tables[1].table,NULL,1,0);
VOID(my_init_dynamic_array(&acl_users,sizeof(ACL_USER),50,100));
if (table->field[2]->field_length == 8 &&
protocol_version == PROTOCOL_VERSION)
{
sql_print_error(
"Old 'user' table. (Check README or the Reference manual). Continuing --old-protocol"); /* purecov: tested */
protocol_version=9; /* purecov: tested */
}
DBUG_PRINT("info",("user table fields: %d, password length: %d",
table->fields, table->field[2]->field_length));
if (table->field[2]->field_length < 45 && !use_old_passwords)
{
sql_print_error("mysql.user table is not updated to new password format; Disabling new password usage until mysql_fix_privilege_tables is run");
use_old_passwords= 1;
}
allow_all_hosts=0;
while (!(read_record_info.read_record(&read_record_info)))
{
ACL_USER user;
uint length=0;
update_hostname(&user.host,get_field(&mem, table,0));
user.user=get_field(&mem, table,1);
user.password=get_field(&mem, table,2);
if (user.password && (length=(uint) strlen(user.password)) == 8 &&
protocol_version == PROTOCOL_VERSION)
{
sql_print_error(
"Found old style password for user '%s'. Ignoring user. (You may want to restart mysqld using --old-protocol)",
user.user ? user.user : ""); /* purecov: tested */
}
else /* non empty and not short passwords */
{
user.pversion=get_password_version(user.password);
/* Only passwords of specific lengths depending on version are allowed */
if ( (!user.pversion && length % 8) || (user.pversion && length!=45 ))
{
sql_print_error(
"Found invalid password for user: '%s@%s'; Ignoring user",
user.user ? user.user : "",
user.host.hostname ? user.host.hostname : ""); /* purecov: tested */
continue; /* purecov: tested */
}
}
get_salt_from_password(user.salt,user.password);
user.access=get_access(table,3) & GLOBAL_ACLS;
user.sort=get_sort(2,user.host.hostname,user.user);
user.hostname_length= (user.host.hostname ?
(uint) strlen(user.host.hostname) : 0);
if (table->fields >= 31) /* Starting from 4.0.2 we have more fields */
{
char *ssl_type=get_field(&mem, table, 24);
if (!ssl_type)
user.ssl_type=SSL_TYPE_NONE;
else if (!strcmp(ssl_type, "ANY"))
user.ssl_type=SSL_TYPE_ANY;
else if (!strcmp(ssl_type, "X509"))
user.ssl_type=SSL_TYPE_X509;
else /* !strcmp(ssl_type, "SPECIFIED") */
user.ssl_type=SSL_TYPE_SPECIFIED;
user.ssl_cipher= get_field(&mem, table, 25);
user.x509_issuer= get_field(&mem, table, 26);
user.x509_subject= get_field(&mem, table, 27);
char *ptr = get_field(&mem, table, 28);
user.user_resource.questions=atoi(ptr);
ptr = get_field(&mem, table, 29);
user.user_resource.updates=atoi(ptr);
ptr = get_field(&mem, table, 30);
user.user_resource.connections=atoi(ptr);
if (user.user_resource.questions || user.user_resource.updates ||
user.user_resource.connections)
mqh_used=1;
}
else
{
user.ssl_type=SSL_TYPE_NONE;
bzero(&(user.user_resource),sizeof(user.user_resource));
#ifndef TO_BE_REMOVED
if (table->fields <= 13)
{ // Without grant
if (user.access & CREATE_ACL)
user.access|=REFERENCES_ACL | INDEX_ACL | ALTER_ACL;
}
/* Convert old privileges */
user.access|= LOCK_TABLES_ACL | CREATE_TMP_ACL | SHOW_DB_ACL;
if (user.access & FILE_ACL)
user.access|= REPL_CLIENT_ACL | REPL_SLAVE_ACL;
if (user.access & PROCESS_ACL)
user.access|= SUPER_ACL | EXECUTE_ACL;
#endif
}
VOID(push_dynamic(&acl_users,(gptr) &user));
if (!user.host.hostname || user.host.hostname[0] == wild_many &&
!user.host.hostname[1])
allow_all_hosts=1; // Anyone can connect
}
qsort((gptr) dynamic_element(&acl_users,0,ACL_USER*),acl_users.elements,
sizeof(ACL_USER),(qsort_cmp) acl_compare);
end_read_record(&read_record_info);
freeze_size(&acl_users);
init_read_record(&read_record_info,thd,table=tables[2].table,NULL,1,0);
VOID(my_init_dynamic_array(&acl_dbs,sizeof(ACL_DB),50,100));
while (!(read_record_info.read_record(&read_record_info)))
{
ACL_DB db;
update_hostname(&db.host,get_field(&mem, table,0));
db.db=get_field(&mem, table,1);
if (!db.db)
{
sql_print_error("Found an entry in the 'db' table with empty database name; Skipped");
continue;
}
db.user=get_field(&mem, table,2);
db.access=get_access(table,3);
db.access=fix_rights_for_db(db.access);
db.sort=get_sort(3,db.host.hostname,db.db,db.user);
#ifndef TO_BE_REMOVED
if (table->fields <= 9)
{ // Without grant
if (db.access & CREATE_ACL)
db.access|=REFERENCES_ACL | INDEX_ACL | ALTER_ACL;
}
#endif
VOID(push_dynamic(&acl_dbs,(gptr) &db));
}
qsort((gptr) dynamic_element(&acl_dbs,0,ACL_DB*),acl_dbs.elements,
sizeof(ACL_DB),(qsort_cmp) acl_compare);
end_read_record(&read_record_info);
freeze_size(&acl_dbs);
init_check_host();
mysql_unlock_tables(thd, lock);
initialized=1;
thd->version--; // Force close to free memory
return_val=0;
end:
close_thread_tables(thd);
delete thd;
if (org_thd)
org_thd->store_globals(); /* purecov: inspected */
else
{
/* Remember that we don't have a THD */
my_pthread_setspecific_ptr(THR_THD, 0);
}
DBUG_RETURN(return_val);
}
void acl_free(bool end)
{
free_root(&mem,MYF(0));
delete_dynamic(&acl_hosts);
delete_dynamic(&acl_users);
delete_dynamic(&acl_dbs);
delete_dynamic(&acl_wild_hosts);
hash_free(&acl_check_hosts);
if (!end)
acl_cache->clear(1); /* purecov: inspected */
else
{
delete acl_cache;
acl_cache=0;
}
}
/* Reload acl list if possible */
void acl_reload(THD *thd)
{
DYNAMIC_ARRAY old_acl_hosts,old_acl_users,old_acl_dbs;
MEM_ROOT old_mem;
bool old_initialized;
DBUG_ENTER("acl_reload");
if (thd && thd->locked_tables)
{ // Can't have locked tables here
thd->lock=thd->locked_tables;
thd->locked_tables=0;
close_thread_tables(thd);
}
if ((old_initialized=initialized))
VOID(pthread_mutex_lock(&acl_cache->lock));
old_acl_hosts=acl_hosts;
old_acl_users=acl_users;
old_acl_dbs=acl_dbs;
old_mem=mem;
delete_dynamic(&acl_wild_hosts);
hash_free(&acl_check_hosts);
if (acl_init(thd, 0))
{ // Error. Revert to old list
DBUG_PRINT("error",("Reverting to old privileges"));
acl_free(); /* purecov: inspected */
acl_hosts=old_acl_hosts;
acl_users=old_acl_users;
acl_dbs=old_acl_dbs;
mem=old_mem;
init_check_host();
}
else
{
free_root(&old_mem,MYF(0));
delete_dynamic(&old_acl_hosts);
delete_dynamic(&old_acl_users);
delete_dynamic(&old_acl_dbs);
}
if (old_initialized)
VOID(pthread_mutex_unlock(&acl_cache->lock));
DBUG_VOID_RETURN;
}
/*
Get all access bits from table after fieldnr
We know that the access privileges ends when there is no more fields
or the field is not an enum with two elements.
*/
static ulong get_access(TABLE *form, uint fieldnr)
{
ulong access_bits=0,bit;
char buff[2];
String res(buff,sizeof(buff),&my_charset_latin1);
Field **pos;
for (pos=form->field+fieldnr, bit=1;
*pos && (*pos)->real_type() == FIELD_TYPE_ENUM &&
((Field_enum*) (*pos))->typelib->count == 2 ;
pos++ , bit<<=1)
{
(*pos)->val_str(&res,&res);
if (my_toupper(&my_charset_latin1, res[0]) == 'Y')
access_bits|= bit;
}
return access_bits;
}
/*
Return a number which, if sorted 'desc', puts strings in this order:
no wildcards
wildcards
empty string
*/
static ulong get_sort(uint count,...)
{
va_list args;
va_start(args,count);
ulong sort=0;
while (count--)
{
char *str=va_arg(args,char*);
uint chars=0,wild=0;
if (str)
{
for (; *str ; str++)
{
if (*str == wild_many || *str == wild_one || *str == wild_prefix)
wild++;
else
chars++;
}
}
sort= (sort << 8) + (wild ? 1 : chars ? 2 : 0);
}
va_end(args);
return sort;
}
static int acl_compare(ACL_ACCESS *a,ACL_ACCESS *b)
{
if (a->sort > b->sort)
return -1;
if (a->sort < b->sort)
return 1;
return 0;
}
/*
Prepare crypted scramble to be sent to the client
*/
void prepare_scramble(THD *thd, ACL_USER *acl_user,char* prepared_scramble)
{
/* Binary password format to be used for generation*/
char bin_password[SCRAMBLE41_LENGTH];
/* Generate new long scramble for the thread */
create_random_string(SCRAMBLE41_LENGTH,&thd->rand,thd->scramble);
thd->scramble[SCRAMBLE41_LENGTH]=0;
/* Get binary form, First 4 bytes of prepared scramble is salt */
get_hash_and_password(acl_user->salt,acl_user->pversion,prepared_scramble,(unsigned char*)bin_password);
/* Store "*" as identifier for old passwords */
if (!acl_user->pversion)
prepared_scramble[0]='*';
/* Finally encrypt password to get prepared scramble */
password_crypt(thd->scramble,prepared_scramble+4,bin_password,SCRAMBLE41_LENGTH);
}
/*
Get master privilges for user (priviliges for all tables).
Required before connecting to MySQL
as we have 2 stage handshake now we cache user not to lookup
it second time. At the second stage we do not lookup user in case
we already know it;
*/
ulong acl_getroot(THD *thd, const char *host, const char *ip, const char *user,
const char *password,const char *message,char **priv_user,
bool old_ver, USER_RESOURCES *mqh,char* prepared_scramble,
uint *cur_priv_version,ACL_USER** hint_user)
{
ulong user_access=NO_ACCESS;
*priv_user= (char*) user;
bool password_correct= 0;
int stage= (*hint_user != NULL); /* NULL passed as first stage */
ACL_USER *acl_user= NULL;
DBUG_ENTER("acl_getroot");
bzero(mqh,sizeof(USER_RESOURCES));
if (!initialized)
{
// If no data allow anything
DBUG_RETURN((ulong) ~NO_ACCESS); /* purecov: tested */
}
VOID(pthread_mutex_lock(&acl_cache->lock));
/*
Get possible access from user_list. This is or'ed to others not
fully specified
If we have cached user use it, in other case look it up.
*/
if (stage && (*cur_priv_version==priv_version))
acl_user=*hint_user;
else
for (uint i=0 ; i < acl_users.elements ; i++)
{
ACL_USER *acl_user_search=dynamic_element(&acl_users,i,ACL_USER*);
if (!acl_user_search->user || !strcmp(user,acl_user_search->user))
{
if (compare_hostname(&acl_user_search->host,host,ip))
{
/* Found mathing user */
acl_user=acl_user_search;
/* Store it as a cache */
*hint_user=acl_user;
*cur_priv_version=priv_version;
break;
}
}
}
/* Now we have acl_user found and may start our checks */
if (acl_user)
{
/* Password should present for both or absend for both */
if (!acl_user->password && !*password ||
(acl_user->password && *password))
{
/* Quick check and accept for empty passwords*/
if (!acl_user->password && !*password)
password_correct=1;
else /* Normal password presents */
{
/* New version password is checked differently */
if (acl_user->pversion)
{
if (stage) /* We check password only on the second stage */
{
if (!validate_password(password,message,acl_user->salt))
password_correct=1;
}
else /* First stage - just prepare scramble */
prepare_scramble(thd,acl_user,prepared_scramble);
}
/* Old way to check password */
else
{
/* Checking the scramble at any stage. First - old clients */
if (!check_scramble(password,message,acl_user->salt,
(my_bool) old_ver))
password_correct=1;
else /* Password incorrect */
/* At the first stage - prepare scramble */
if (!stage)
prepare_scramble(thd,acl_user,prepared_scramble);
}
}
}
}
/* If user not found password_correct will also be zero */
if (!password_correct)
goto unlock_and_exit;
/* OK. User found and password checked continue validation */
#ifdef HAVE_OPENSSL
{
Vio *vio=thd->net.vio;
/*
In this point we know that user is allowed to connect
from given host by given username/password pair. Now
we check if SSL is required, if user is using SSL and
if X509 certificate attributes are OK
*/
switch (acl_user->ssl_type) {
case SSL_TYPE_NOT_SPECIFIED: // Impossible
case SSL_TYPE_NONE: /* SSL is not required to connect */
user_access=acl_user->access;
break;
case SSL_TYPE_ANY: /* Any kind of SSL is good enough */
if (vio_type(vio) == VIO_TYPE_SSL)
user_access=acl_user->access;
break;
case SSL_TYPE_X509: /* Client should have any valid certificate. */
/*
Connections with non-valid certificates are dropped already
in sslaccept() anyway, so we do not check validity here.
*/
if (SSL_get_peer_certificate(vio->ssl_))
user_access=acl_user->access;
break;
case SSL_TYPE_SPECIFIED: /* Client should have specified attrib */
/*
We do not check for absence of SSL because without SSL it does
not pass all checks here anyway.
If cipher name is specified, we compare it to actual cipher in
use.
*/
if (acl_user->ssl_cipher)
{
DBUG_PRINT("info",("comparing ciphers: '%s' and '%s'",
acl_user->ssl_cipher,SSL_get_cipher(vio->ssl_)));
if (!strcmp(acl_user->ssl_cipher,SSL_get_cipher(vio->ssl_)))
user_access=acl_user->access;
else
{
user_access=NO_ACCESS;
break;
}
}
/* Prepare certificate (if exists) */
DBUG_PRINT("info",("checkpoint 1"));
X509* cert=SSL_get_peer_certificate(vio->ssl_);
DBUG_PRINT("info",("checkpoint 2"));
/* If X509 issuer is speified, we check it... */
if (acl_user->x509_issuer)
{
DBUG_PRINT("info",("checkpoint 3"));
char *ptr = X509_NAME_oneline(X509_get_issuer_name(cert), 0, 0);
DBUG_PRINT("info",("comparing issuers: '%s' and '%s'",
acl_user->x509_issuer, ptr));
if (strcmp(acl_user->x509_issuer, ptr))
{
user_access=NO_ACCESS;
free(ptr);
break;
}
user_access=acl_user->access;
free(ptr);
}
DBUG_PRINT("info",("checkpoint 4"));
/* X509 subject is specified, we check it .. */
if (acl_user->x509_subject)
{
char *ptr= X509_NAME_oneline(X509_get_subject_name(cert), 0, 0);
DBUG_PRINT("info",("comparing subjects: '%s' and '%s'",
acl_user->x509_subject, ptr));
if (strcmp(acl_user->x509_subject,ptr))
user_access=NO_ACCESS;
else
user_access=acl_user->access;
free(ptr);
}
break;
}
}
#else /* HAVE_OPENSSL */
user_access=acl_user->access;
#endif /* HAVE_OPENSSL */
*mqh=acl_user->user_resource;
if (!acl_user->user)
*priv_user=(char*) ""; // Change to anonymous user /* purecov: inspected */
unlock_and_exit:
VOID(pthread_mutex_unlock(&acl_cache->lock));
DBUG_RETURN(user_access);
}
static byte* check_get_key(ACL_USER *buff,uint *length,
my_bool not_used __attribute__((unused)))
{
*length=buff->hostname_length;
return (byte*) buff->host.hostname;
}
static void acl_update_user(const char *user, const char *host,
const char *password,
enum SSL_type ssl_type,
const char *ssl_cipher,
const char *x509_issuer,
const char *x509_subject,
USER_RESOURCES *mqh,
ulong privileges)
{
for (uint i=0 ; i < acl_users.elements ; i++)
{
ACL_USER *acl_user=dynamic_element(&acl_users,i,ACL_USER*);
if (!acl_user->user && !user[0] ||
acl_user->user &&
!strcmp(user,acl_user->user))
{
if (!acl_user->host.hostname && !host[0] ||
acl_user->host.hostname &&
!my_strcasecmp(&my_charset_latin1, host, acl_user->host.hostname))
{
acl_user->access=privileges;
if (mqh->bits & 1)
acl_user->user_resource.questions=mqh->questions;
if (mqh->bits & 2)
acl_user->user_resource.updates=mqh->updates;
if (mqh->bits & 4)
acl_user->user_resource.connections=mqh->connections;
if (ssl_type != SSL_TYPE_NOT_SPECIFIED)
{
acl_user->ssl_type= ssl_type;
acl_user->ssl_cipher= (ssl_cipher ? strdup_root(&mem,ssl_cipher) :
0);
acl_user->x509_issuer= (x509_issuer ? strdup_root(&mem,x509_issuer) :
0);
acl_user->x509_subject= (x509_subject ?
strdup_root(&mem,x509_subject) : 0);
}
if (password)
{
if (!password[0]) /* If password is empty set it to null */
{
acl_user->password=0;
acl_user->pversion=0; // just initialize
}
else
{
acl_user->password=(char*) ""; // Just point at something
get_salt_from_password(acl_user->salt,password);
acl_user->pversion=get_password_version(acl_user->password);
}
}
break;
}
}
}
}
static void acl_insert_user(const char *user, const char *host,
const char *password,
enum SSL_type ssl_type,
const char *ssl_cipher,
const char *x509_issuer,
const char *x509_subject,
USER_RESOURCES *mqh,
ulong privileges)
{
ACL_USER acl_user;
acl_user.user=strdup_root(&mem,user);
update_hostname(&acl_user.host,strdup_root(&mem,host));
acl_user.password=0;
acl_user.access=privileges;
acl_user.user_resource = *mqh;
acl_user.sort=get_sort(2,acl_user.host.hostname,acl_user.user);
acl_user.hostname_length=(uint) strlen(acl_user.host.hostname);
acl_user.ssl_type= (ssl_type != SSL_TYPE_NOT_SPECIFIED ?
ssl_type : SSL_TYPE_NONE);
acl_user.ssl_cipher= ssl_cipher ? strdup_root(&mem,ssl_cipher) : 0;
acl_user.x509_issuer= x509_issuer ? strdup_root(&mem,x509_issuer) : 0;
acl_user.x509_subject=x509_subject ? strdup_root(&mem,x509_subject) : 0;
if (password)
{
acl_user.password=(char*) ""; // Just point at something
get_salt_from_password(acl_user.salt,password);
acl_user.pversion=get_password_version(password);
}
VOID(push_dynamic(&acl_users,(gptr) &acl_user));
if (!acl_user.host.hostname || acl_user.host.hostname[0] == wild_many
&& !acl_user.host.hostname[1])
allow_all_hosts=1; // Anyone can connect /* purecov: tested */
qsort((gptr) dynamic_element(&acl_users,0,ACL_USER*),acl_users.elements,
sizeof(ACL_USER),(qsort_cmp) acl_compare);
/* We must free acl_check_hosts as its memory is mapped to acl_user */
delete_dynamic(&acl_wild_hosts);
hash_free(&acl_check_hosts);
init_check_host();
}
static void acl_update_db(const char *user, const char *host, const char *db,
ulong privileges)
{
for (uint i=0 ; i < acl_dbs.elements ; i++)
{
ACL_DB *acl_db=dynamic_element(&acl_dbs,i,ACL_DB*);
if (!acl_db->user && !user[0] ||
acl_db->user &&
!strcmp(user,acl_db->user))
{
if (!acl_db->host.hostname && !host[0] ||
acl_db->host.hostname &&
!my_strcasecmp(&my_charset_latin1, host, acl_db->host.hostname))
{
if (!acl_db->db && !db[0] ||
acl_db->db && !strcmp(db,acl_db->db))
{
if (privileges)
acl_db->access=privileges;
else
delete_dynamic_element(&acl_dbs,i);
}
}
}
}
}
/*
Insert a user/db/host combination into the global acl_cache
SYNOPSIS
acl_insert_db()
user User name
host Host name
db Database name
privileges Bitmap of privileges
NOTES
acl_cache->lock must be locked when calling this
*/
static void acl_insert_db(const char *user, const char *host, const char *db,
ulong privileges)
{
ACL_DB acl_db;
safe_mutex_assert_owner(&acl_cache->lock);
acl_db.user=strdup_root(&mem,user);
update_hostname(&acl_db.host,strdup_root(&mem,host));
acl_db.db=strdup_root(&mem,db);
acl_db.access=privileges;
acl_db.sort=get_sort(3,acl_db.host.hostname,acl_db.db,acl_db.user);
VOID(push_dynamic(&acl_dbs,(gptr) &acl_db));
qsort((gptr) dynamic_element(&acl_dbs,0,ACL_DB*),acl_dbs.elements,
sizeof(ACL_DB),(qsort_cmp) acl_compare);
}
/*****************************************************************************
** Get privilege for a host, user and db combination
*****************************************************************************/
ulong acl_get(const char *host, const char *ip, const char *bin_ip,
const char *user, const char *db)
{
ulong host_access,db_access;
uint i,key_length;
db_access=0; host_access= ~0;
char key[ACL_KEY_LENGTH],*tmp_db,*end;
acl_entry *entry;
VOID(pthread_mutex_lock(&acl_cache->lock));
memcpy_fixed(&key,bin_ip,sizeof(struct in_addr));
end=strmov((tmp_db=strmov(key+sizeof(struct in_addr),user)+1),db);
if (lower_case_table_names)
{
my_casedn_str(&my_charset_latin1, tmp_db);
db=tmp_db;
}
key_length=(uint) (end-key);
if ((entry=(acl_entry*) acl_cache->search(key,key_length)))
{
db_access=entry->access;
VOID(pthread_mutex_unlock(&acl_cache->lock));
return db_access;
}
/*
Check if there are some access rights for database and user
*/
for (i=0 ; i < acl_dbs.elements ; i++)
{
ACL_DB *acl_db=dynamic_element(&acl_dbs,i,ACL_DB*);
if (!acl_db->user || !strcmp(user,acl_db->user))
{
if (compare_hostname(&acl_db->host,host,ip))
{
if (!acl_db->db || !wild_compare(db,acl_db->db))
{
db_access=acl_db->access;
if (acl_db->host.hostname)
goto exit; // Fully specified. Take it
break; /* purecov: tested */
}
}
}
}
if (!db_access)
goto exit; // Can't be better
/*
No host specified for user. Get hostdata from host table
*/
host_access=0; // Host must be found
for (i=0 ; i < acl_hosts.elements ; i++)
{
ACL_HOST *acl_host=dynamic_element(&acl_hosts,i,ACL_HOST*);
if (compare_hostname(&acl_host->host,host,ip))
{
if (!acl_host->db || !wild_compare(db,acl_host->db))
{
host_access=acl_host->access; // Fully specified. Take it
break;
}
}
}
exit:
/* Save entry in cache for quick retrieval */
if ((entry= (acl_entry*) malloc(sizeof(acl_entry)+key_length)))
{
entry->access=(db_access & host_access);
entry->length=key_length;
memcpy((gptr) entry->key,key,key_length);
acl_cache->add(entry);
}
VOID(pthread_mutex_unlock(&acl_cache->lock));
return (db_access & host_access);
}
int wild_case_compare(CHARSET_INFO *cs, const char *str,const char *wildstr)
{
reg3 int flag;
DBUG_ENTER("wild_case_compare");
DBUG_PRINT("enter",("str: '%s' wildstr: '%s'",str,wildstr));
while (*wildstr)
{
while (*wildstr && *wildstr != wild_many && *wildstr != wild_one)
{
if (*wildstr == wild_prefix && wildstr[1])
wildstr++;
if (my_toupper(cs, *wildstr++) !=
my_toupper(cs, *str++)) DBUG_RETURN(1);
}
if (! *wildstr ) DBUG_RETURN (*str != 0);
if (*wildstr++ == wild_one)
{
if (! *str++) DBUG_RETURN (1); /* One char; skip */
}
else
{ /* Found '*' */
if (!*wildstr) DBUG_RETURN(0); /* '*' as last char: OK */
flag=(*wildstr != wild_many && *wildstr != wild_one);
do
{
if (flag)
{
char cmp;
if ((cmp= *wildstr) == wild_prefix && wildstr[1])
cmp=wildstr[1];
cmp=my_toupper(cs, cmp);
while (*str && my_toupper(cs, *str) != cmp)
str++;
if (!*str) DBUG_RETURN (1);
}
if (wild_case_compare(cs, str,wildstr) == 0) DBUG_RETURN (0);
} while (*str++);
DBUG_RETURN(1);
}
}
DBUG_RETURN (*str != '\0');
}
/*****************************************************************************
** check if there are any possible matching entries for this host
** All host names without wild cards are stored in a hash table,
** entries with wildcards are stored in a dynamic array
*****************************************************************************/
static void init_check_host(void)
{
DBUG_ENTER("init_check_host");
VOID(my_init_dynamic_array(&acl_wild_hosts,sizeof(struct acl_host_and_ip),
acl_users.elements,1));
VOID(hash_init(&acl_check_hosts,&my_charset_latin1,acl_users.elements,0,0,
(hash_get_key) check_get_key,0,HASH_CASE_INSENSITIVE));
if (!allow_all_hosts)
{
for (uint i=0 ; i < acl_users.elements ; i++)
{
ACL_USER *acl_user=dynamic_element(&acl_users,i,ACL_USER*);
if (strchr(acl_user->host.hostname,wild_many) ||
strchr(acl_user->host.hostname,wild_one) ||
acl_user->host.ip_mask)
{ // Has wildcard
uint j;
for (j=0 ; j < acl_wild_hosts.elements ; j++)
{ // Check if host already exists
acl_host_and_ip *acl=dynamic_element(&acl_wild_hosts,j,
acl_host_and_ip *);
if (!my_strcasecmp(&my_charset_latin1,
acl_user->host.hostname, acl->hostname))
break; // already stored
}
if (j == acl_wild_hosts.elements) // If new
(void) push_dynamic(&acl_wild_hosts,(char*) &acl_user->host);
}
else if (!hash_search(&acl_check_hosts,(byte*) &acl_user->host,
(uint) strlen(acl_user->host.hostname)))
{
if (hash_insert(&acl_check_hosts,(byte*) acl_user))
{ // End of memory
allow_all_hosts=1; // Should never happen
DBUG_VOID_RETURN;
}
}
}
}
freeze_size(&acl_wild_hosts);
freeze_size(&acl_check_hosts.array);
DBUG_VOID_RETURN;
}
/* Return true if there is no users that can match the given host */
bool acl_check_host(const char *host, const char *ip)
{
if (allow_all_hosts)
return 0;
VOID(pthread_mutex_lock(&acl_cache->lock));
if (host && hash_search(&acl_check_hosts,(byte*) host,(uint) strlen(host)) ||
ip && hash_search(&acl_check_hosts,(byte*) ip,(uint) strlen(ip)))
{
VOID(pthread_mutex_unlock(&acl_cache->lock));
return 0; // Found host
}
for (uint i=0 ; i < acl_wild_hosts.elements ; i++)
{
acl_host_and_ip *acl=dynamic_element(&acl_wild_hosts,i,acl_host_and_ip*);
if (compare_hostname(acl, host, ip))
{
VOID(pthread_mutex_unlock(&acl_cache->lock));
return 0; // Host ok
}
}
VOID(pthread_mutex_unlock(&acl_cache->lock));
return 1; // Host is not allowed
}
/*****************************************************************************
Change password for the user if it's not an anonymous user
Note: This should write the error directly to the client!
*****************************************************************************/
/*
Check if the user is allowed to change password
SYNOPSIS:
check_change_password()
thd THD
host hostname for the user
user user name
RETURN VALUE
0 OK
1 ERROR ; In this case the error is sent to the client.
*/
bool check_change_password(THD *thd, const char *host, const char *user)
{
if (!initialized)
{
send_error(thd, ER_PASSWORD_NOT_ALLOWED); /* purecov: inspected */
return(1); /* purecov: inspected */
}
if (!thd->slave_thread &&
(strcmp(thd->user,user) ||
my_strcasecmp(&my_charset_latin1, host, thd->host_or_ip)))
{
if (check_access(thd, UPDATE_ACL, "mysql",0,1))
return(1);
}
if (!thd->slave_thread && !thd->user[0])
{
send_error(thd, ER_PASSWORD_ANONYMOUS_USER);
return(1);
}
return(0);
}
/*
Change a password for a user
SYNOPSIS
change_password()
thd Thread handle
host Hostname
user User name
new_password New password for host@user
RETURN VALUES
0 ok
1 ERROR; In this case the error is sent to the client.
*/
bool change_password(THD *thd, const char *host, const char *user,
char *new_password)
{
uint length=0;
DBUG_ENTER("change_password");
DBUG_PRINT("enter",("host: '%s' user: '%s' new_password: '%s'",
host,user,new_password));
DBUG_ASSERT(host != 0); // Ensured by parent
if (check_change_password(thd, host, user))
DBUG_RETURN(1);
/* password should always be 0,16 or 45 chars; simple hack to avoid cracking */
length=(uint) strlen(new_password);
if (length!=45)
new_password[length & 16]=0;
VOID(pthread_mutex_lock(&acl_cache->lock));
ACL_USER *acl_user;
if (!(acl_user= find_acl_user(host,user)))
{
send_error(thd, ER_PASSWORD_NO_MATCH);
VOID(pthread_mutex_unlock(&acl_cache->lock));
DBUG_RETURN(1);
}
if (update_user_table(thd,
acl_user->host.hostname ? acl_user->host.hostname : "",
acl_user->user ? acl_user->user : "",
new_password))
{
VOID(pthread_mutex_unlock(&acl_cache->lock)); /* purecov: deadcode */
send_error(thd,0); /* purecov: deadcode */
DBUG_RETURN(1); /* purecov: deadcode */
}
get_salt_from_password(acl_user->salt,new_password);
acl_user->pversion=get_password_version(new_password);
if (!new_password[0])
acl_user->password=0;
else
acl_user->password=(char*) ""; // Point at something
acl_cache->clear(1); // Clear locked hostname cache
VOID(pthread_mutex_unlock(&acl_cache->lock));
char buff[512]; /* Extend with extended password length*/
ulong query_length=
my_sprintf(buff,
(buff,"SET PASSWORD FOR \"%-.120s\"@\"%-.120s\"=\"%-.120s\"",
acl_user->user ? acl_user->user : "",
acl_user->host.hostname ? acl_user->host.hostname : "",
new_password));
mysql_update_log.write(thd, buff, query_length);
Query_log_event qinfo(thd, buff, query_length, 0);
mysql_bin_log.write(&qinfo);
DBUG_RETURN(0);
}
/*
Find first entry that matches the current user
*/
static ACL_USER *
find_acl_user(const char *host, const char *user)
{
DBUG_ENTER("find_acl_user");
DBUG_PRINT("enter",("host: '%s' user: '%s'",host,user));
for (uint i=0 ; i < acl_users.elements ; i++)
{
ACL_USER *acl_user=dynamic_element(&acl_users,i,ACL_USER*);
DBUG_PRINT("info",("strcmp('%s','%s'), compare_hostname('%s','%s'),",
user,acl_user->user,(host),(acl_user->host)));
if (!acl_user->user && !user[0] ||
acl_user->user && !strcmp(user,acl_user->user))
{
if (compare_hostname(&(acl_user->host),host,host))
{
DBUG_RETURN(acl_user);
}
}
}
DBUG_RETURN(0);
}
/*****************************************************************************
Handle comparing of hostname
A hostname may be of type:
hostname (May include wildcards); monty.pp.sci.fi
ip (May include wildcards); 192.168.0.0
ip/netmask 192.168.0.0/255.255.255.0
A net mask of 0.0.0.0 is not allowed.
*****************************************************************************/
static const char *calc_ip(const char *ip, long *val, char end)
{
long ip_val,tmp;
if (!(ip=str2int(ip,10,0,255,&ip_val)) || *ip != '.')
return 0;
ip_val<<=24;
if (!(ip=str2int(ip+1,10,0,255,&tmp)) || *ip != '.')
return 0;
ip_val+=tmp<<16;
if (!(ip=str2int(ip+1,10,0,255,&tmp)) || *ip != '.')
return 0;
ip_val+=tmp<<8;
if (!(ip=str2int(ip+1,10,0,255,&tmp)) || *ip != end)
return 0;
*val=ip_val+tmp;
return ip;
}
static void update_hostname(acl_host_and_ip *host, const char *hostname)
{
host->hostname=(char*) hostname; // This will not be modified!
if (hostname &&
(!(hostname=calc_ip(hostname,&host->ip,'/')) ||
!(hostname=calc_ip(hostname+1,&host->ip_mask,'\0'))))
{
host->ip=host->ip_mask=0; // Not a masked ip
}
}
static bool compare_hostname(const acl_host_and_ip *host, const char *hostname,
const char *ip)
{
long tmp;
if (host->ip_mask && ip && calc_ip(ip,&tmp,'\0'))
{
return (tmp & host->ip_mask) == host->ip;
}
return (!host->hostname ||
(hostname && !wild_case_compare(&my_charset_latin1,
hostname,host->hostname)) ||
(ip && !wild_compare(ip,host->hostname)));
}
/****************************************************************************
Code to update grants in the user and database privilege tables
****************************************************************************/
static bool update_user_table(THD *thd, const char *host, const char *user,
const char *new_password)
{
TABLE_LIST tables;
TABLE *table;
bool error=1;
DBUG_ENTER("update_user_table");
DBUG_PRINT("enter",("user: %s host: %s",user,host));
bzero((char*) &tables,sizeof(tables));
tables.alias=tables.real_name=(char*) "user";
tables.db=(char*) "mysql";
if (!(table=open_ltable(thd,&tables,TL_WRITE)))
DBUG_RETURN(1); /* purecov: deadcode */
table->field[0]->store(host,(uint) strlen(host), &my_charset_latin1);
table->field[1]->store(user,(uint) strlen(user), &my_charset_latin1);
if (table->file->index_read_idx(table->record[0],0,
(byte*) table->field[0]->ptr,0,
HA_READ_KEY_EXACT))
{
my_error(ER_PASSWORD_NO_MATCH,MYF(0)); /* purecov: deadcode */
DBUG_RETURN(1); /* purecov: deadcode */
}
store_record(table,1);
table->field[2]->store(new_password,(uint) strlen(new_password), &my_charset_latin1);
if ((error=table->file->update_row(table->record[1],table->record[0])))
{
table->file->print_error(error,MYF(0)); /* purecov: deadcode */
goto end; /* purecov: deadcode */
}
error=0; // Record updated
end:
close_thread_tables(thd);
DBUG_RETURN(error);
}
/* Return 1 if we are allowed to create new users */
static bool test_if_create_new_users(THD *thd)
{
bool create_new_users=1; // Assume that we are allowed to create new users
if (opt_safe_user_create && !(thd->master_access & INSERT_ACL))
{
TABLE_LIST tl;
ulong db_access;
bzero((char*) &tl,sizeof(tl));
tl.db= (char*) "mysql";
tl.real_name= (char*) "user";
db_access=acl_get(thd->host, thd->ip, (char*) &thd->remote.sin_addr,
thd->priv_user, tl.db);
if (!(db_access & INSERT_ACL))
{
if (check_grant(thd,INSERT_ACL,&tl,0,1))
create_new_users=0;
}
}
return create_new_users;
}
/****************************************************************************
** Handle GRANT commands
****************************************************************************/
static int replace_user_table(THD *thd, TABLE *table, const LEX_USER &combo,
ulong rights, bool revoke_grant,
bool create_user)
{
int error = -1;
bool old_row_exists=0;
char *password,empty_string[1];
char what= (revoke_grant) ? 'N' : 'Y';
DBUG_ENTER("replace_user_table");
safe_mutex_assert_owner(&acl_cache->lock);
password=empty_string;
empty_string[0]=0;
if (combo.password.str && combo.password.str[0])
{
if ((combo.password.length != HASH_PASSWORD_LENGTH)
&& combo.password.length != HASH_OLD_PASSWORD_LENGTH)
{
my_error(ER_PASSWORD_NO_MATCH,MYF(0));
DBUG_RETURN(-1);
}
password=combo.password.str;
}
table->field[0]->store(combo.host.str,combo.host.length, &my_charset_latin1);
table->field[1]->store(combo.user.str,combo.user.length, &my_charset_latin1);
table->file->index_init(0);
if (table->file->index_read(table->record[0],
(byte*) table->field[0]->ptr,0,
HA_READ_KEY_EXACT))
{
if (!create_user)
{
if (what == 'N')
my_printf_error(ER_NONEXISTING_GRANT,ER(ER_NONEXISTING_GRANT),
MYF(0),combo.user.str,combo.host.str);
else
my_printf_error(ER_NO_PERMISSION_TO_CREATE_USER,
ER(ER_NO_PERMISSION_TO_CREATE_USER),
MYF(0),thd->user,
thd->host_or_ip);
error= -1;
goto end;
}
old_row_exists = 0;
restore_record(table,2); // cp empty row from record[2]
table->field[0]->store(combo.host.str,combo.host.length, &my_charset_latin1);
table->field[1]->store(combo.user.str,combo.user.length, &my_charset_latin1);
table->field[2]->store(password,(uint) strlen(password), &my_charset_latin1);
}
else
{
old_row_exists = 1;
store_record(table,1); // Save copy for update
if (combo.password.str) // If password given
table->field[2]->store(password,(uint) strlen(password), &my_charset_latin1);
}
/* Update table columns with new privileges */
Field **tmp_field;
ulong priv;
for (tmp_field= table->field+3, priv = SELECT_ACL;
*tmp_field && (*tmp_field)->real_type() == FIELD_TYPE_ENUM &&
((Field_enum*) (*tmp_field))->typelib->count == 2 ;
tmp_field++, priv <<= 1)
{
if (priv & rights) // set requested privileges
(*tmp_field)->store(&what, 1, &my_charset_latin1);
}
rights=get_access(table,3);
DBUG_PRINT("info",("table->fields: %d",table->fields));
if (table->fields >= 31) /* From 4.0.0 we have more fields */
{
/* We write down SSL related ACL stuff */
switch (thd->lex.ssl_type) {
case SSL_TYPE_ANY:
table->field[24]->store("ANY",3, &my_charset_latin1);
table->field[25]->store("", 0, &my_charset_latin1);
table->field[26]->store("", 0, &my_charset_latin1);
table->field[27]->store("", 0, &my_charset_latin1);
break;
case SSL_TYPE_X509:
table->field[24]->store("X509",4, &my_charset_latin1);
table->field[25]->store("", 0, &my_charset_latin1);
table->field[26]->store("", 0, &my_charset_latin1);
table->field[27]->store("", 0, &my_charset_latin1);
break;
case SSL_TYPE_SPECIFIED:
table->field[24]->store("SPECIFIED",9, &my_charset_latin1);
table->field[25]->store("", 0, &my_charset_latin1);
table->field[26]->store("", 0, &my_charset_latin1);
table->field[27]->store("", 0, &my_charset_latin1);
if (thd->lex.ssl_cipher)
table->field[25]->store(thd->lex.ssl_cipher,
strlen(thd->lex.ssl_cipher), &my_charset_latin1);
if (thd->lex.x509_issuer)
table->field[26]->store(thd->lex.x509_issuer,
strlen(thd->lex.x509_issuer), &my_charset_latin1);
if (thd->lex.x509_subject)
table->field[27]->store(thd->lex.x509_subject,
strlen(thd->lex.x509_subject), &my_charset_latin1);
break;
case SSL_TYPE_NOT_SPECIFIED:
break;
case SSL_TYPE_NONE:
table->field[24]->store("", 0, &my_charset_latin1);
table->field[25]->store("", 0, &my_charset_latin1);
table->field[26]->store("", 0, &my_charset_latin1);
table->field[27]->store("", 0, &my_charset_latin1);
break;
}
USER_RESOURCES mqh = thd->lex.mqh;
if (mqh.bits & 1)
table->field[28]->store((longlong) mqh.questions);
if (mqh.bits & 2)
table->field[29]->store((longlong) mqh.updates);
if (mqh.bits & 4)
table->field[30]->store((longlong) mqh.connections);
mqh_used = mqh_used || mqh.questions || mqh.updates || mqh.connections;
}
if (old_row_exists)
{
/*
We should NEVER delete from the user table, as a uses can still
use mysqld even if he doesn't have any privileges in the user table!
*/
if (cmp_record(table,1) &&
(error=table->file->update_row(table->record[1],table->record[0])))
{ // This should never happen
table->file->print_error(error,MYF(0)); /* purecov: deadcode */
error= -1; /* purecov: deadcode */
goto end; /* purecov: deadcode */
}
}
else if ((error=table->file->write_row(table->record[0]))) // insert
{ // This should never happen
if (error && error != HA_ERR_FOUND_DUPP_KEY &&
error != HA_ERR_FOUND_DUPP_UNIQUE) /* purecov: inspected */
{
table->file->print_error(error,MYF(0)); /* purecov: deadcode */
error= -1; /* purecov: deadcode */
goto end; /* purecov: deadcode */
}
}
error=0; // Privileges granted / revoked
end:
if (!error)
{
acl_cache->clear(1); // Clear privilege cache
if (!combo.password.str)
password=0; // No password given on command
if (old_row_exists)
acl_update_user(combo.user.str,combo.host.str,password,
thd->lex.ssl_type,
thd->lex.ssl_cipher,
thd->lex.x509_issuer,
thd->lex.x509_subject,
&thd->lex.mqh,
rights);
else
acl_insert_user(combo.user.str,combo.host.str,password,
thd->lex.ssl_type,
thd->lex.ssl_cipher,
thd->lex.x509_issuer,
thd->lex.x509_subject,
&thd->lex.mqh,
rights);
}
table->file->index_end();
DBUG_RETURN(error);
}
/*
change grants in the mysql.db table
*/
static int replace_db_table(TABLE *table, const char *db,
const LEX_USER &combo,
ulong rights, bool revoke_grant)
{
uint i;
ulong priv,store_rights;
bool old_row_exists=0;
int error;
char what= (revoke_grant) ? 'N' : 'Y';
DBUG_ENTER("replace_db_table");
// is there such a user in user table in memory ????
if (!initialized || !find_acl_user(combo.host.str,combo.user.str))
{
my_error(ER_PASSWORD_NO_MATCH,MYF(0));
DBUG_RETURN(-1);
}
table->field[0]->store(combo.host.str,combo.host.length, &my_charset_latin1);
table->field[1]->store(db,(uint) strlen(db), &my_charset_latin1);
table->field[2]->store(combo.user.str,combo.user.length, &my_charset_latin1);
table->file->index_init(0);
if (table->file->index_read(table->record[0],(byte*) table->field[0]->ptr,0,
HA_READ_KEY_EXACT))
{
if (what == 'N')
{ // no row, no revoke
my_printf_error(ER_NONEXISTING_GRANT,ER(ER_NONEXISTING_GRANT),MYF(0),
combo.user.str,combo.host.str);
goto abort;
}
old_row_exists = 0;
restore_record(table,2); // cp empty row from record[2]
table->field[0]->store(combo.host.str,combo.host.length, &my_charset_latin1);
table->field[1]->store(db,(uint) strlen(db), &my_charset_latin1);
table->field[2]->store(combo.user.str,combo.user.length, &my_charset_latin1);
}
else
{
old_row_exists = 1;
store_record(table,1);
}
store_rights=get_rights_for_db(rights);
for (i= 3, priv= 1; i < table->fields; i++, priv <<= 1)
{
if (priv & store_rights) // do it if priv is chosen
table->field [i]->store(&what,1, &my_charset_latin1);// set requested privileges
}
rights=get_access(table,3);
rights=fix_rights_for_db(rights);
if (old_row_exists)
{
// update old existing row
if (rights)
{
if ((error=table->file->update_row(table->record[1],table->record[0])))
goto table_error; /* purecov: deadcode */
}
else /* must have been a revoke of all privileges */
{
if ((error = table->file->delete_row(table->record[1])))
goto table_error; /* purecov: deadcode */
}
}
else if ((error=table->file->write_row(table->record[0])))
{
if (error && error != HA_ERR_FOUND_DUPP_KEY) /* purecov: inspected */
goto table_error; /* purecov: deadcode */
}
acl_cache->clear(1); // Clear privilege cache
if (old_row_exists)
acl_update_db(combo.user.str,combo.host.str,db,rights);
else
acl_insert_db(combo.user.str,combo.host.str,db,rights);
table->file->index_end();
DBUG_RETURN(0);
/* This could only happen if the grant tables got corrupted */
table_error:
table->file->print_error(error,MYF(0)); /* purecov: deadcode */
table->file->index_end();
abort:
DBUG_RETURN(-1);
}
class GRANT_COLUMN :public Sql_alloc
{
public:
char *column;
ulong rights;
uint key_length;
GRANT_COLUMN(String &c, ulong y) :rights (y)
{
column= memdup_root(&memex,c.ptr(), key_length=c.length());
}
};
static byte* get_key_column(GRANT_COLUMN *buff,uint *length,
my_bool not_used __attribute__((unused)))
{
*length=buff->key_length;
return (byte*) buff->column;
}
class GRANT_TABLE :public Sql_alloc
{
public:
char *host,*db,*user,*tname, *hash_key;
ulong privs, cols;
uint key_length;
HASH hash_columns;
GRANT_TABLE (const char *h, const char *d,const char *u, const char *t,
ulong p, ulong c)
: privs(p), cols(c)
{
host = strdup_root(&memex,h);
db = strdup_root(&memex,d);
user = strdup_root(&memex,u);
tname= strdup_root(&memex,t);
if (lower_case_table_names)
{
my_casedn_str(&my_charset_latin1, db);
my_casedn_str(&my_charset_latin1, tname);
}
key_length =(uint) strlen(d)+(uint) strlen(u)+(uint) strlen(t)+3;
hash_key = (char*) alloc_root(&memex,key_length);
strmov(strmov(strmov(hash_key,user)+1,db)+1,tname);
(void) hash_init(&hash_columns,&my_charset_latin1,
0,0,0, (hash_get_key) get_key_column,0,
HASH_CASE_INSENSITIVE);
}
GRANT_TABLE (TABLE *form, TABLE *col_privs)
{
byte key[MAX_KEY_LENGTH];
host = get_field(&memex,form,0);
db = get_field(&memex,form,1);
user = get_field(&memex,form,2);
if (!user)
user=(char*) "";
tname = get_field(&memex,form,3);
if (!host || !db || !tname)
{
/* Wrong table row; Ignore it */
privs = cols = 0; /* purecov: inspected */
return; /* purecov: inspected */
}
if (lower_case_table_names)
{
my_casedn_str(&my_charset_latin1, db);
my_casedn_str(&my_charset_latin1, tname);
}
key_length = ((uint) strlen(db) + (uint) strlen(user) +
(uint) strlen(tname) + 3);
hash_key = (char*) alloc_root(&memex,key_length);
strmov(strmov(strmov(hash_key,user)+1,db)+1,tname);
privs = (ulong) form->field[6]->val_int();
cols = (ulong) form->field[7]->val_int();
privs = fix_rights_for_table(privs);
cols = fix_rights_for_column(cols);
(void) hash_init(&hash_columns,&my_charset_latin1,
0,0,0, (hash_get_key) get_key_column,0,
HASH_CASE_INSENSITIVE);
if (cols)
{
int key_len;
col_privs->field[0]->store(host,(uint) strlen(host), &my_charset_latin1);
col_privs->field[1]->store(db,(uint) strlen(db), &my_charset_latin1);
col_privs->field[2]->store(user,(uint) strlen(user), &my_charset_latin1);
col_privs->field[3]->store(tname,(uint) strlen(tname), &my_charset_latin1);
key_len=(col_privs->field[0]->pack_length()+
col_privs->field[1]->pack_length()+
col_privs->field[2]->pack_length()+
col_privs->field[3]->pack_length());
key_copy(key,col_privs,0,key_len);
col_privs->field[4]->store("",0, &my_charset_latin1);
col_privs->file->index_init(0);
if (col_privs->file->index_read(col_privs->record[0],
(byte*) col_privs->field[0]->ptr,
key_len, HA_READ_KEY_EXACT))
{
cols = 0; /* purecov: deadcode */
return;
}
do
{
String *res,column_name;
GRANT_COLUMN *mem_check;
/* As column name is a string, we don't have to supply a buffer */
res=col_privs->field[4]->val_str(&column_name,&column_name);
ulong priv= (ulong) col_privs->field[6]->val_int();
if (!(mem_check = new GRANT_COLUMN(*res,
fix_rights_for_column(priv))))
{
// Don't use this entry
privs = cols = 0; /* purecov: deadcode */
return; /* purecov: deadcode */
}
hash_insert(&hash_columns, (byte *) mem_check);
} while (!col_privs->file->index_next(col_privs->record[0]) &&
!key_cmp(col_privs,key,0,key_len));
}
}
bool ok() { return privs != 0 || cols != 0; }
};
static byte* get_grant_table(GRANT_TABLE *buff,uint *length,
my_bool not_used __attribute__((unused)))
{
*length=buff->key_length;
return (byte*) buff->hash_key;
}
void free_grant_table(GRANT_TABLE *grant_table)
{
hash_free(&grant_table->hash_columns);
}
/* Search after a matching grant. Prefer exact grants before not exact ones */
static GRANT_TABLE *table_hash_search(const char *host,const char* ip,
const char *db,
const char *user, const char *tname,
bool exact)
{
char helping [NAME_LEN*2+USERNAME_LENGTH+3];
uint len;
GRANT_TABLE *grant_table,*found=0;
len = (uint) (strmov(strmov(strmov(helping,user)+1,db)+1,tname)-helping)+ 1;
for (grant_table=(GRANT_TABLE*) hash_search(&column_priv_hash,
(byte*) helping,
len) ;
grant_table ;
grant_table= (GRANT_TABLE*) hash_next(&column_priv_hash,(byte*) helping,
len))
{
if (exact)
{
if ((host &&
!my_strcasecmp(&my_charset_latin1, host, grant_table->host)) ||
(ip && !strcmp(ip,grant_table->host)))
return grant_table;
}
else
{
if ((host && !wild_case_compare(&my_charset_latin1,
host,grant_table->host)) ||
(ip && !wild_case_compare(&my_charset_latin1,
ip,grant_table->host)))
found=grant_table; // Host ok
}
}
return found;
}
inline GRANT_COLUMN *
column_hash_search(GRANT_TABLE *t, const char *cname, uint length)
{
return (GRANT_COLUMN*) hash_search(&t->hash_columns, (byte*) cname,length);
}
static int replace_column_table(GRANT_TABLE *g_t,
TABLE *table, const LEX_USER &combo,
List <LEX_COLUMN> &columns,
const char *db, const char *table_name,
ulong rights, bool revoke_grant)
{
int error=0,result=0;
uint key_length;
byte key[MAX_KEY_LENGTH];
DBUG_ENTER("replace_column_table");
table->field[0]->store(combo.host.str,combo.host.length, &my_charset_latin1);
table->field[1]->store(db,(uint) strlen(db), &my_charset_latin1);
table->field[2]->store(combo.user.str,combo.user.length, &my_charset_latin1);
table->field[3]->store(table_name,(uint) strlen(table_name), &my_charset_latin1);
key_length=(table->field[0]->pack_length()+ table->field[1]->pack_length()+
table->field[2]->pack_length()+ table->field[3]->pack_length());
key_copy(key,table,0,key_length);
rights &= COL_ACLS; // Only ACL for columns
/* first fix privileges for all columns in column list */
List_iterator <LEX_COLUMN> iter(columns);
class LEX_COLUMN *xx;
table->file->index_init(0);
while ((xx=iter++))
{
ulong privileges = xx->rights;
bool old_row_exists=0;
key_restore(table,key,0,key_length);
table->field[4]->store(xx->column.ptr(),xx->column.length(),&my_charset_latin1);
if (table->file->index_read(table->record[0],(byte*) table->field[0]->ptr,
0, HA_READ_KEY_EXACT))
{
if (revoke_grant)
{
my_printf_error(ER_NONEXISTING_TABLE_GRANT,
ER(ER_NONEXISTING_TABLE_GRANT),MYF(0),
combo.user.str, combo.host.str,table_name); /* purecov: inspected */
result= -1; /* purecov: inspected */
continue; /* purecov: inspected */
}
old_row_exists = 0;
restore_record(table,2); // Get empty record
key_restore(table,key,0,key_length);
table->field[4]->store(xx->column.ptr(),xx->column.length(), &my_charset_latin1);
}
else
{
ulong tmp= (ulong) table->field[6]->val_int();
tmp=fix_rights_for_column(tmp);
if (revoke_grant)
privileges = tmp & ~(privileges | rights);
else
privileges |= tmp;
old_row_exists = 1;
store_record(table,1); // copy original row
}
table->field[6]->store((longlong) get_rights_for_column(privileges));
if (old_row_exists)
{
if (privileges)
error=table->file->update_row(table->record[1],table->record[0]);
else
error=table->file->delete_row(table->record[1]);
if (error)
{
table->file->print_error(error,MYF(0)); /* purecov: inspected */
result= -1; /* purecov: inspected */
goto end; /* purecov: inspected */
}
GRANT_COLUMN *grant_column = column_hash_search(g_t,
xx->column.ptr(),
xx->column.length());
if (grant_column) // Should always be true
grant_column->rights = privileges; // Update hash
}
else // new grant
{
if ((error=table->file->write_row(table->record[0])))
{
table->file->print_error(error,MYF(0)); /* purecov: inspected */
result= -1; /* purecov: inspected */
goto end; /* purecov: inspected */
}
GRANT_COLUMN *grant_column = new GRANT_COLUMN(xx->column,privileges);
hash_insert(&g_t->hash_columns,(byte*) grant_column);
}
}
table->file->index_end();
/*
If revoke of privileges on the table level, remove all such privileges
for all columns
*/
if (revoke_grant)
{
table->file->index_init(0);
if (table->file->index_read(table->record[0], (byte*) table->field[0]->ptr,
key_length, HA_READ_KEY_EXACT))
goto end;
// Scan trough all rows with the same host,db,user and table
do
{
ulong privileges = (ulong) table->field[6]->val_int();
privileges=fix_rights_for_column(privileges);
store_record(table,1);
if (privileges & rights) // is in this record the priv to be revoked ??
{
GRANT_COLUMN *grant_column = NULL;
char colum_name_buf[HOSTNAME_LENGTH+1];
String column_name(colum_name_buf,sizeof(colum_name_buf),&my_charset_latin1);
privileges&= ~rights;
table->field[6]->store((longlong)
get_rights_for_column(privileges));
table->field[4]->val_str(&column_name,&column_name);
grant_column = column_hash_search(g_t,
column_name.ptr(),
column_name.length());
if (privileges)
{
int tmp_error;
if ((tmp_error=table->file->update_row(table->record[1],
table->record[0])))
{ /* purecov: deadcode */
table->file->print_error(tmp_error,MYF(0)); /* purecov: deadcode */
result= -1; /* purecov: deadcode */
goto end; /* purecov: deadcode */
}
if (grant_column)
grant_column->rights = privileges; // Update hash
}
else
{
int tmp_error;
if ((tmp_error = table->file->delete_row(table->record[1])))
{ /* purecov: deadcode */
table->file->print_error(tmp_error,MYF(0)); /* purecov: deadcode */
result= -1; /* purecov: deadcode */
goto end; /* purecov: deadcode */
}
if (grant_column)
hash_delete(&g_t->hash_columns,(byte*) grant_column);
}
}
} while (!table->file->index_next(table->record[0]) &&
!key_cmp(table,key,0,key_length));
}
end:
table->file->index_end();
DBUG_RETURN(result);
}
static int replace_table_table(THD *thd, GRANT_TABLE *grant_table,
TABLE *table, const LEX_USER &combo,
const char *db, const char *table_name,
ulong rights, ulong col_rights,
bool revoke_grant)
{
char grantor[HOSTNAME_LENGTH+USERNAME_LENGTH+2];
int old_row_exists = 1;
int error=0;
ulong store_table_rights, store_col_rights;
DBUG_ENTER("replace_table_table");
strxmov(grantor, thd->user, "@", thd->host_or_ip, NullS);
/*
The following should always succeed as new users are created before
this function is called!
*/
if (!find_acl_user(combo.host.str,combo.user.str))
{
my_error(ER_PASSWORD_NO_MATCH,MYF(0)); /* purecov: deadcode */
DBUG_RETURN(-1); /* purecov: deadcode */
}
restore_record(table,2); // Get empty record
table->field[0]->store(combo.host.str,combo.host.length, &my_charset_latin1);
table->field[1]->store(db,(uint) strlen(db), &my_charset_latin1);
table->field[2]->store(combo.user.str,combo.user.length, &my_charset_latin1);
table->field[3]->store(table_name,(uint) strlen(table_name), &my_charset_latin1);
store_record(table,1); // store at pos 1
if (table->file->index_read_idx(table->record[0],0,
(byte*) table->field[0]->ptr,0,
HA_READ_KEY_EXACT))
{
/*
The following should never happen as we first check the in memory
grant tables for the user. There is however always a small change that
the user has modified the grant tables directly.
*/
if (revoke_grant)
{ // no row, no revoke
my_printf_error(ER_NONEXISTING_TABLE_GRANT,
ER(ER_NONEXISTING_TABLE_GRANT),MYF(0),
combo.user.str,combo.host.str,
table_name); /* purecov: deadcode */
DBUG_RETURN(-1); /* purecov: deadcode */
}
old_row_exists = 0;
restore_record(table,1); // Get saved record
}
store_table_rights= get_rights_for_table(rights);
store_col_rights= get_rights_for_column(col_rights);
if (old_row_exists)
{
ulong j,k;
store_record(table,1);
j = (ulong) table->field[6]->val_int();
k = (ulong) table->field[7]->val_int();
if (revoke_grant)
{
// column rights are already fixed in mysql_table_grant !
store_table_rights=j & ~store_table_rights;
}
else
{
store_table_rights|= j;
store_col_rights|= k;
}
}
table->field[4]->store(grantor,(uint) strlen(grantor), &my_charset_latin1);
table->field[6]->store((longlong) store_table_rights);
table->field[7]->store((longlong) store_col_rights);
rights=fix_rights_for_table(store_table_rights);
col_rights=fix_rights_for_column(store_col_rights);
if (old_row_exists)
{
if (store_table_rights || store_col_rights)
{
if ((error=table->file->update_row(table->record[1],table->record[0])))
goto table_error; /* purecov: deadcode */
}
else if ((error = table->file->delete_row(table->record[1])))
goto table_error; /* purecov: deadcode */
}
else
{
error=table->file->write_row(table->record[0]);
if (error && error != HA_ERR_FOUND_DUPP_KEY)
goto table_error; /* purecov: deadcode */
}
if (rights | col_rights)
{
grant_table->privs= rights;
grant_table->cols= col_rights;
}
else
{
hash_delete(&column_priv_hash,(byte*) grant_table);
}
DBUG_RETURN(0);
/* This should never happen */
table_error:
table->file->print_error(error,MYF(0)); /* purecov: deadcode */
DBUG_RETURN(-1); /* purecov: deadcode */
}
int mysql_table_grant (THD *thd, TABLE_LIST *table_list,
List <LEX_USER> &user_list,
List <LEX_COLUMN> &columns, ulong rights,
bool revoke_grant)
{
ulong column_priv = 0;
List_iterator <LEX_USER> str_list (user_list);
LEX_USER *Str;
TABLE_LIST tables[3];
bool create_new_users=0;
DBUG_ENTER("mysql_table_grant");
if (!initialized)
{
send_error(thd, ER_UNKNOWN_COM_ERROR); /* purecov: inspected */
return 1; /* purecov: inspected */
}
if (rights & ~TABLE_ACLS)
{
my_error(ER_ILLEGAL_GRANT_FOR_TABLE,MYF(0));
DBUG_RETURN(-1);
}
if (columns.elements && !revoke_grant)
{
TABLE *table;
class LEX_COLUMN *check;
List_iterator <LEX_COLUMN> iter(columns);
if (!(table=open_ltable(thd,table_list,TL_READ)))
DBUG_RETURN(-1);
while ((check = iter++))
{
if (!find_field_in_table(thd,table,check->column.ptr(),
check->column.length(),0,0))
{
my_printf_error(ER_BAD_FIELD_ERROR,ER(ER_BAD_FIELD_ERROR),MYF(0),
check->column.c_ptr(), table_list->alias);
DBUG_RETURN(-1);
}
column_priv |= check->rights | (rights & COL_ACLS);
}
close_thread_tables(thd);
}
else if (!(rights & CREATE_ACL) && !revoke_grant)
{
char buf[FN_REFLEN];
sprintf(buf,"%s/%s/%s.frm",mysql_data_home, table_list->db,
table_list->real_name);
fn_format(buf,buf,"","",4+16+32);
if (access(buf,F_OK))
{
my_error(ER_NO_SUCH_TABLE,MYF(0),table_list->db, table_list->alias);
DBUG_RETURN(-1);
}
}
/* open the mysql.tables_priv and mysql.columns_priv tables */
bzero((char*) &tables,sizeof(tables));
tables[0].alias=tables[0].real_name= (char*) "user";
tables[1].alias=tables[1].real_name= (char*) "tables_priv";
tables[2].alias=tables[2].real_name= (char*) "columns_priv";
tables[0].next=tables+1;
/* Don't open column table if we don't need it ! */
tables[1].next=((column_priv ||
(revoke_grant && ((rights & COL_ACLS) || columns.elements)))
? tables+2 : 0);
tables[0].lock_type=tables[1].lock_type=tables[2].lock_type=TL_WRITE;
tables[0].db=tables[1].db=tables[2].db=(char*) "mysql";
if (open_and_lock_tables(thd,tables))
{ // Should never happen
close_thread_tables(thd); /* purecov: deadcode */
DBUG_RETURN(-1); /* purecov: deadcode */
}
if (!revoke_grant)
create_new_users= test_if_create_new_users(thd);
int result=0;
rw_wrlock(&LOCK_grant);
MEM_ROOT *old_root=my_pthread_getspecific_ptr(MEM_ROOT*,THR_MALLOC);
my_pthread_setspecific_ptr(THR_MALLOC,&memex);
while ((Str = str_list++))
{
int error;
GRANT_TABLE *grant_table;
if (!Str->host.str)
{
Str->host.str=(char*) "%";
Str->host.length=1;
}
if (Str->host.length > HOSTNAME_LENGTH ||
Str->user.length > USERNAME_LENGTH)
{
my_error(ER_GRANT_WRONG_HOST_OR_USER,MYF(0));
result= -1;
continue;
}
/* Create user if needed */
pthread_mutex_lock(&acl_cache->lock);
error=replace_user_table(thd, tables[0].table, *Str,
0, revoke_grant, create_new_users);
pthread_mutex_unlock(&acl_cache->lock);
if (error)
{
result= -1; // Remember error
continue; // Add next user
}
/* Find/create cached table grant */
grant_table= table_hash_search(Str->host.str,NullS,table_list->db,
Str->user.str,
table_list->real_name,1);
if (!grant_table)
{
if (revoke_grant)
{
my_printf_error(ER_NONEXISTING_TABLE_GRANT,
ER(ER_NONEXISTING_TABLE_GRANT),MYF(0),
Str->user.str, Str->host.str, table_list->real_name);
result= -1;
continue;
}
grant_table = new GRANT_TABLE (Str->host.str,table_list->db,
Str->user.str,
table_list->real_name,
rights,
column_priv);
if (!grant_table) // end of memory
{
result= -1; /* purecov: deadcode */
continue; /* purecov: deadcode */
}
hash_insert(&column_priv_hash,(byte*) grant_table);
}
/* If revoke_grant, calculate the new column privilege for tables_priv */
if (revoke_grant)
{
class LEX_COLUMN *check;
List_iterator <LEX_COLUMN> iter(columns);
GRANT_COLUMN *grant_column;
/* Fix old grants */
while ((check = iter++))
{
grant_column = column_hash_search(grant_table,
check->column.ptr(),
check->column.length());
if (grant_column)
grant_column->rights&= ~(check->rights | rights);
}
/* scan trough all columns to get new column grant */
column_priv=0;
for (uint idx=0 ; idx < grant_table->hash_columns.records ; idx++)
{
grant_column= (GRANT_COLUMN*) hash_element(&grant_table->hash_columns,
idx);
grant_column->rights&= ~rights; // Fix other columns
column_priv|= grant_column->rights;
}
}
else
{
column_priv|= grant_table->cols;
}
/* update table and columns */
if (replace_table_table(thd,grant_table,tables[1].table,*Str,
table_list->db,
table_list->real_name,
rights, column_priv, revoke_grant))
{ // Crashend table ??
result= -1; /* purecov: deadcode */
}
else if (tables[2].table)
{
if ((replace_column_table(grant_table,tables[2].table, *Str,
columns,
table_list->db,
table_list->real_name,
rights, revoke_grant)))
{
result= -1;
}
}
}
grant_option=TRUE;
my_pthread_setspecific_ptr(THR_MALLOC,old_root);
rw_unlock(&LOCK_grant);
if (!result)
send_ok(thd);
/* Tables are automatically closed */
DBUG_RETURN(result);
}
int mysql_grant (THD *thd, const char *db, List <LEX_USER> &list,
ulong rights, bool revoke_grant)
{
List_iterator <LEX_USER> str_list (list);
LEX_USER *Str;
char tmp_db[NAME_LEN+1];
bool create_new_users=0;
TABLE_LIST tables[2];
DBUG_ENTER("mysql_grant");
if (!initialized)
{
send_error(thd, ER_UNKNOWN_COM_ERROR); /* purecov: tested */
return 1; /* purecov: tested */
}
if (lower_case_table_names && db)
{
strmov(tmp_db,db);
my_casedn_str(&my_charset_latin1, tmp_db);
db=tmp_db;
}
/* open the mysql.user and mysql.db tables */
tables[0].alias=tables[0].real_name=(char*) "user";
tables[1].alias=tables[1].real_name=(char*) "db";
tables[0].next=tables+1;
tables[1].next=0;
tables[0].lock_type=tables[1].lock_type=TL_WRITE;
tables[0].db=tables[1].db=(char*) "mysql";
tables[0].table=tables[1].table=0;
if (open_and_lock_tables(thd,tables))
{ // This should never happen
close_thread_tables(thd); /* purecov: deadcode */
DBUG_RETURN(-1); /* purecov: deadcode */
}
if (!revoke_grant)
create_new_users= test_if_create_new_users(thd);
// go through users in user_list
rw_wrlock(&LOCK_grant);
VOID(pthread_mutex_lock(&acl_cache->lock));
grant_version++;
int result=0;
while ((Str = str_list++))
{
if (!Str->host.str)
{
Str->host.str=(char*) "%";
Str->host.length=1;
}
if (Str->host.length > HOSTNAME_LENGTH ||
Str->user.length > USERNAME_LENGTH)
{
my_error(ER_GRANT_WRONG_HOST_OR_USER,MYF(0));
result= -1;
continue;
}
if ((replace_user_table(thd,
tables[0].table,
*Str,
(!db ? rights : 0), revoke_grant,
create_new_users)))
result= -1;
else
{
if (db && replace_db_table(tables[1].table, db, *Str, rights & DB_ACLS,
revoke_grant))
result= -1;
}
}
VOID(pthread_mutex_unlock(&acl_cache->lock));
rw_unlock(&LOCK_grant);
close_thread_tables(thd);
if (!result)
send_ok(thd);
DBUG_RETURN(result);
}
/* Free grant array if possible */
void grant_free(void)
{
DBUG_ENTER("grant_free");
grant_option = FALSE;
hash_free(&column_priv_hash);
free_root(&memex,MYF(0));
DBUG_VOID_RETURN;
}
/* Init grant array if possible */
my_bool grant_init(THD *org_thd)
{
THD *thd;
TABLE_LIST tables[2];
MYSQL_LOCK *lock;
my_bool return_val= 1;
TABLE *t_table, *c_table;
DBUG_ENTER("grant_init");
grant_option = FALSE;
(void) hash_init(&column_priv_hash,&my_charset_latin1,
0,0,0, (hash_get_key) get_grant_table,
(hash_free_key) free_grant_table,0);
init_sql_alloc(&memex,1024,0);
/* Don't do anything if running with --skip-grant */
if (!initialized)
DBUG_RETURN(0); /* purecov: tested */
if (!(thd=new THD))
DBUG_RETURN(1); /* purecov: deadcode */
thd->store_globals();
thd->db= my_strdup("mysql",MYF(0));
thd->db_length=5; // Safety
bzero((char*) &tables,sizeof(tables));
tables[0].alias=tables[0].real_name= (char*) "tables_priv";
tables[1].alias=tables[1].real_name= (char*) "columns_priv";
tables[0].next=tables+1;
tables[0].lock_type=tables[1].lock_type=TL_READ;
tables[0].db=tables[1].db=thd->db;
if (open_tables(thd,tables))
goto end;
TABLE *ptr[2]; // Lock tables for quick update
ptr[0]= tables[0].table;
ptr[1]= tables[1].table;
if (!(lock=mysql_lock_tables(thd,ptr,2)))
goto end;
t_table = tables[0].table; c_table = tables[1].table;
t_table->file->index_init(0);
if (t_table->file->index_first(t_table->record[0]))
{
t_table->file->index_end();
return_val= 0;
goto end_unlock;
}
grant_option= TRUE;
t_table->file->index_end();
/* Will be restored by org_thd->store_globals() */
my_pthread_setspecific_ptr(THR_MALLOC,&memex);
do
{
GRANT_TABLE *mem_check;
if (!(mem_check=new GRANT_TABLE(t_table,c_table)) ||
mem_check->ok() && hash_insert(&column_priv_hash,(byte*) mem_check))
{
/* This could only happen if we are out memory */
grant_option = FALSE; /* purecov: deadcode */
goto end_unlock;
}
}
while (!t_table->file->index_next(t_table->record[0]));
return_val=0; // Return ok
end_unlock:
mysql_unlock_tables(thd, lock);
thd->version--; // Force close to free memory
end:
close_thread_tables(thd);
delete thd;
if (org_thd)
org_thd->store_globals();
else
{
/* Remember that we don't have a THD */
my_pthread_setspecific_ptr(THR_THD, 0);
}
DBUG_RETURN(return_val);
}
/* Reload grant array (table and column privileges) if possible */
void grant_reload(THD *thd)
{
HASH old_column_priv_hash;
bool old_grant_option;
MEM_ROOT old_mem;
DBUG_ENTER("grant_reload");
// Locked tables are checked by acl_init and doesn't have to be checked here
rw_wrlock(&LOCK_grant);
grant_version++;
old_column_priv_hash= column_priv_hash;
old_grant_option = grant_option;
old_mem = memex;
if (grant_init(thd))
{ // Error. Revert to old hash
DBUG_PRINT("error",("Reverting to old privileges"));
grant_free(); /* purecov: deadcode */
column_priv_hash= old_column_priv_hash; /* purecov: deadcode */
grant_option = old_grant_option; /* purecov: deadcode */
memex = old_mem; /* purecov: deadcode */
}
else
{
hash_free(&old_column_priv_hash);
free_root(&old_mem,MYF(0));
}
rw_unlock(&LOCK_grant);
DBUG_VOID_RETURN;
}
/****************************************************************************
Check grants
All errors are written directly to the client if command name is given !
****************************************************************************/
bool check_grant(THD *thd, ulong want_access, TABLE_LIST *tables,
uint show_table, bool no_errors)
{
TABLE_LIST *table;
char *user = thd->priv_user;
want_access &= ~thd->master_access;
if (!want_access)
return 0; // ok
rw_rdlock(&LOCK_grant);
for (table=tables; table ;table=table->next)
{
if (!(~table->grant.privilege & want_access))
{
table->grant.want_privilege=0;
continue; // Already checked
}
GRANT_TABLE *grant_table = table_hash_search(thd->host,thd->ip,
table->db,user,
table->real_name,0);
if (!grant_table)
{
want_access &= ~table->grant.privilege;
goto err; // No grants
}
if (show_table)
continue; // We have some priv on this
table->grant.grant_table=grant_table; // Remember for column test
table->grant.version=grant_version;
table->grant.privilege|= grant_table->privs;
table->grant.want_privilege= ((want_access & COL_ACLS)
& ~table->grant.privilege);
if (!(~table->grant.privilege & want_access))
continue;
if (want_access & ~(grant_table->cols | table->grant.privilege))
{
want_access &= ~(grant_table->cols | table->grant.privilege);
goto err; // impossible
}
}
rw_unlock(&LOCK_grant);
return 0;
err:
rw_unlock(&LOCK_grant);
if (!no_errors) // Not a silent skip of table
{
const char *command="";
if (want_access & SELECT_ACL)
command ="select";
else if (want_access & INSERT_ACL)
command = "insert";
else if (want_access & UPDATE_ACL)
command = "update";
else if (want_access & DELETE_ACL)
command = "delete";
else if (want_access & DROP_ACL)
command = "drop";
else if (want_access & CREATE_ACL)
command = "create";
else if (want_access & ALTER_ACL)
command = "alter";
else if (want_access & INDEX_ACL)
command = "index";
else if (want_access & GRANT_ACL)
command = "grant";
net_printf(thd,ER_TABLEACCESS_DENIED_ERROR,
command,
thd->priv_user,
thd->host_or_ip,
table ? table->real_name : "unknown");
}
return 1;
}
bool check_grant_column (THD *thd,TABLE *table, const char *name,
uint length, uint show_tables)
{
GRANT_TABLE *grant_table;
GRANT_COLUMN *grant_column;
ulong want_access=table->grant.want_privilege;
if (!want_access)
return 0; // Already checked
rw_rdlock(&LOCK_grant);
// reload table if someone has modified any grants
if (table->grant.version != grant_version)
{
table->grant.grant_table=
table_hash_search(thd->host,thd->ip,thd->db,
thd->priv_user,
table->real_name,0); /* purecov: inspected */
table->grant.version=grant_version; /* purecov: inspected */
}
if (!(grant_table=table->grant.grant_table))
goto err; /* purecov: deadcode */
grant_column=column_hash_search(grant_table, name, length);
if (grant_column && !(~grant_column->rights & want_access))
{
rw_unlock(&LOCK_grant);
return 0;
}
#ifdef NOT_USED
if (show_tables && (grant_column || table->grant.privilege & COL_ACLS))
{
rw_unlock(&LOCK_grant); /* purecov: deadcode */
return 0; /* purecov: deadcode */
}
#endif
/* We must use my_printf_error() here! */
err:
rw_unlock(&LOCK_grant);
if (!show_tables)
{
char command[128];
get_privilege_desc(command, sizeof(command), want_access);
my_printf_error(ER_COLUMNACCESS_DENIED_ERROR,
ER(ER_COLUMNACCESS_DENIED_ERROR),
MYF(0),
command,
thd->priv_user,
thd->host_or_ip,
name,
table ? table->real_name : "unknown");
}
return 1;
}
bool check_grant_all_columns(THD *thd, ulong want_access, TABLE *table)
{
GRANT_TABLE *grant_table;
GRANT_COLUMN *grant_column;
Field *field=0,**ptr;
want_access &= ~table->grant.privilege;
if (!want_access)
return 0; // Already checked
rw_rdlock(&LOCK_grant);
// reload table if someone has modified any grants
if (table->grant.version != grant_version)
{
table->grant.grant_table=
table_hash_search(thd->host,thd->ip,thd->db,
thd->priv_user,
table->real_name,0); /* purecov: inspected */
table->grant.version=grant_version; /* purecov: inspected */
}
// The following should always be true
if (!(grant_table=table->grant.grant_table))
goto err; /* purecov: inspected */
for (ptr=table->field; (field= *ptr) ; ptr++)
{
grant_column=column_hash_search(grant_table, field->field_name,
(uint) strlen(field->field_name));
if (!grant_column || (~grant_column->rights & want_access))
goto err;
}
rw_unlock(&LOCK_grant);
return 0;
/* We must use my_printf_error() here! */
err:
rw_unlock(&LOCK_grant);
const char *command="";
if (want_access & SELECT_ACL)
command ="select";
else if (want_access & INSERT_ACL)
command = "insert";
my_printf_error(ER_COLUMNACCESS_DENIED_ERROR,
ER(ER_COLUMNACCESS_DENIED_ERROR),
MYF(0),
command,
thd->priv_user,
thd->host_or_ip,
field ? field->field_name : "unknown",
table->real_name);
return 1;
}
/****************************************************************************
Check if a user has the right to access a database
Access is accepted if he has a grant for any table in the database
Return 1 if access is denied
****************************************************************************/
bool check_grant_db(THD *thd,const char *db)
{
char helping [NAME_LEN+USERNAME_LENGTH+2];
uint len;
bool error=1;
len = (uint) (strmov(strmov(helping,thd->priv_user)+1,db)-helping)+ 1;
rw_rdlock(&LOCK_grant);
for (uint idx=0 ; idx < column_priv_hash.records ; idx++)
{
GRANT_TABLE *grant_table= (GRANT_TABLE*) hash_element(&column_priv_hash,
idx);
if (len < grant_table->key_length &&
!memcmp(grant_table->hash_key,helping,len) &&
(thd->host && !wild_case_compare(&my_charset_latin1,
thd->host,grant_table->host) ||
(thd->ip && !wild_case_compare(&my_charset_latin1,
thd->ip,grant_table->host))))
{
error=0; // Found match
break;
}
}
rw_unlock(&LOCK_grant);
return error;
}
/*****************************************************************************
Functions to retrieve the grant for a table/column (for SHOW functions)
*****************************************************************************/
ulong get_table_grant(THD *thd, TABLE_LIST *table)
{
ulong privilege;
char *user = thd->priv_user;
const char *db = table->db ? table->db : thd->db;
GRANT_TABLE *grant_table;
rw_rdlock(&LOCK_grant);
#ifdef EMBEDDED_LIBRARY
grant_table= NULL;
#else
grant_table = table_hash_search(thd->host,thd->ip,db,user,
table->real_name,0);
#endif
table->grant.grant_table=grant_table; // Remember for column test
table->grant.version=grant_version;
if (grant_table)
table->grant.privilege|= grant_table->privs;
privilege= table->grant.privilege;
rw_unlock(&LOCK_grant);
return privilege;
}
ulong get_column_grant(THD *thd, TABLE_LIST *table, Field *field)
{
GRANT_TABLE *grant_table;
GRANT_COLUMN *grant_column;
ulong priv;
rw_rdlock(&LOCK_grant);
// reload table if someone has modified any grants
if (table->grant.version != grant_version)
{
table->grant.grant_table=
table_hash_search(thd->host,thd->ip,thd->db,
thd->priv_user,
table->real_name,0); /* purecov: inspected */
table->grant.version=grant_version; /* purecov: inspected */
}
if (!(grant_table=table->grant.grant_table))
priv=table->grant.privilege;
else
{
grant_column=column_hash_search(grant_table, field->field_name,
(uint) strlen(field->field_name));
if (!grant_column)
priv=table->grant.privilege;
else
priv=table->grant.privilege | grant_column->rights;
}
rw_unlock(&LOCK_grant);
return priv;
}
/*****************************************************************************
SHOW GRANTS : send to client grant-like strings depicting user@host
privileges
*****************************************************************************/
static const char *command_array[]=
{
"SELECT", "INSERT","UPDATE","DELETE","CREATE", "DROP", "RELOAD","SHUTDOWN",
"PROCESS","FILE","GRANT","REFERENCES","INDEX", "ALTER", "SHOW DATABASES",
"SUPER", "CREATE TEMPORARY TABLES", "LOCK TABLES", "EXECUTE",
"REPLICATION SLAVE", "REPLICATION CLIENT",
};
static uint command_lengths[]=
{
6,6,6,6,6,4,6,8,7,4,5,10,5,5,14,5,23,11,7,17,18
};
int mysql_show_grants(THD *thd,LEX_USER *lex_user)
{
ulong want_access;
uint counter,index;
int error = 0;
ACL_USER *acl_user; ACL_DB *acl_db;
char buff[1024];
Protocol *protocol= thd->protocol;
DBUG_ENTER("mysql_show_grants");
LINT_INIT(acl_user);
if (!initialized)
{
send_error(thd, ER_UNKNOWN_COM_ERROR);
DBUG_RETURN(-1);
}
if (!lex_user->host.str)
{
lex_user->host.str=(char*) "%";
lex_user->host.length=1;
}
if (lex_user->host.length > HOSTNAME_LENGTH ||
lex_user->user.length > USERNAME_LENGTH)
{
my_error(ER_GRANT_WRONG_HOST_OR_USER,MYF(0));
DBUG_RETURN(-1);
}
for (counter=0 ; counter < acl_users.elements ; counter++)
{
const char *user,*host;
acl_user=dynamic_element(&acl_users,counter,ACL_USER*);
if (!(user=acl_user->user))
user="";
if (!(host=acl_user->host.hostname))
host="%";
if (!strcmp(lex_user->user.str,user) &&
!my_strcasecmp(&my_charset_latin1, lex_user->host.str, host))
break;
}
if (counter == acl_users.elements)
{
my_printf_error(ER_NONEXISTING_GRANT,ER(ER_NONEXISTING_GRANT),
MYF(0),lex_user->user.str,lex_user->host.str);
DBUG_RETURN(-1);
}
Item_string *field=new Item_string("",0,&my_charset_latin1);
List<Item> field_list;
field->name=buff;
field->max_length=1024;
strxmov(buff,"Grants for ",lex_user->user.str,"@",
lex_user->host.str,NullS);
field_list.push_back(field);
if (protocol->send_fields(&field_list,1))
DBUG_RETURN(-1);
rw_wrlock(&LOCK_grant);
VOID(pthread_mutex_lock(&acl_cache->lock));
/* Add first global access grants */
if (acl_user->access || acl_user->password ||
acl_user->ssl_type != SSL_TYPE_NONE)
{
want_access=acl_user->access;
String global(buff,sizeof(buff),&my_charset_latin1);
global.length(0);
global.append("GRANT ",6);
if (test_all_bits(want_access, (GLOBAL_ACLS & ~ GRANT_ACL)))
global.append("ALL PRIVILEGES",14);
else if (!(want_access & ~GRANT_ACL))
global.append("USAGE",5);
else
{
bool found=0;
ulong j,test_access= want_access & ~GRANT_ACL;
for (counter=0, j = SELECT_ACL;j <= GLOBAL_ACLS;counter++,j <<= 1)
{
if (test_access & j)
{
if (found)
global.append(", ",2);
found=1;
global.append(command_array[counter],command_lengths[counter]);
}
}
}
global.append (" ON *.* TO '",12);
global.append(lex_user->user.str,lex_user->user.length);
global.append ("'@'",3);
global.append(lex_user->host.str,lex_user->host.length);
global.append ('\'');
if (acl_user->password)
{
char passd_buff[HASH_PASSWORD_LENGTH+1];
make_password_from_salt(passd_buff,acl_user->salt,acl_user->pversion);
global.append(" IDENTIFIED BY PASSWORD '",25);
global.append(passd_buff);
global.append('\'');
}
/* "show grants" SSL related stuff */
if (acl_user->ssl_type == SSL_TYPE_ANY)
global.append(" REQUIRE SSL",12);
else if (acl_user->ssl_type == SSL_TYPE_X509)
global.append(" REQUIRE X509",13);
else if (acl_user->ssl_type == SSL_TYPE_SPECIFIED)
{
int ssl_options = 0;
global.append(" REQUIRE ",9);
if (acl_user->x509_issuer)
{
ssl_options++;
global.append("ISSUER \'",8);
global.append(acl_user->x509_issuer,strlen(acl_user->x509_issuer));
global.append('\'');
}
if (acl_user->x509_subject)
{
if (ssl_options++)
global.append(' ');
global.append("SUBJECT \'",9);
global.append(acl_user->x509_subject,strlen(acl_user->x509_subject));
global.append('\'');
}
if (acl_user->ssl_cipher)
{
if (ssl_options++)
global.append(' ');
global.append("CIPHER '",8);
global.append(acl_user->ssl_cipher,strlen(acl_user->ssl_cipher));
global.append('\'');
}
}
if ((want_access & GRANT_ACL) ||
(acl_user->user_resource.questions | acl_user->user_resource.updates |
acl_user->user_resource.connections))
{
global.append(" WITH",5);
if (want_access & GRANT_ACL)
global.append(" GRANT OPTION",13);
if (acl_user->user_resource.questions)
{
char buff[22], *p; // just as in int2str
global.append(" MAX_QUERIES_PER_HOUR ",22);
p=int10_to_str(acl_user->user_resource.questions,buff,10);
global.append(buff,p-buff);
}
if (acl_user->user_resource.updates)
{
char buff[22], *p; // just as in int2str
global.append(" MAX_UPDATES_PER_HOUR ",22);
p=int10_to_str(acl_user->user_resource.updates,buff,10);
global.append(buff,p-buff);
}
if (acl_user->user_resource.connections)
{
char buff[22], *p; // just as in int2str
global.append(" MAX_CONNECTIONS_PER_HOUR ",26);
p=int10_to_str(acl_user->user_resource.connections,buff,10);
global.append(buff,p-buff);
}
}
protocol->prepare_for_resend();
protocol->store(global.ptr(),global.length());
if (protocol->write())
{
error=-1;
goto end;
}
}
/* Add database access */
for (counter=0 ; counter < acl_dbs.elements ; counter++)
{
const char *user,*host;
acl_db=dynamic_element(&acl_dbs,counter,ACL_DB*);
if (!(user=acl_db->user))
user="";
if (!(host=acl_db->host.hostname))
host="";
if (!strcmp(lex_user->user.str,user) &&
!my_strcasecmp(&my_charset_latin1, lex_user->host.str, host))
{
want_access=acl_db->access;
if (want_access)
{
String db(buff,sizeof(buff),&my_charset_latin1);
db.length(0);
db.append("GRANT ",6);
if (test_all_bits(want_access,(DB_ACLS & ~GRANT_ACL)))
db.append("ALL PRIVILEGES",14);
else
{
int found=0, cnt;
ulong j,test_access= want_access & ~GRANT_ACL;
for (cnt=0, j = SELECT_ACL; j <= DB_ACLS; cnt++,j <<= 1)
{
if (test_access & j)
{
if (found)
db.append(", ",2);
found = 1;
db.append(command_array[cnt],command_lengths[cnt]);
}
}
}
db.append (" ON `",5);
db.append(acl_db->db);
db.append ("`.* TO '",8);
db.append(lex_user->user.str,lex_user->user.length);
db.append ("'@'",3);
db.append(lex_user->host.str, lex_user->host.length);
db.append ('\'');
if (want_access & GRANT_ACL)
db.append(" WITH GRANT OPTION",18);
protocol->prepare_for_resend();
protocol->store(db.ptr(),db.length());
if (protocol->write())
{
error=-1;
goto end;
}
}
}
}
/* Add column access */
for (index=0 ; index < column_priv_hash.records ; index++)
{
const char *user,*host;
GRANT_TABLE *grant_table= (GRANT_TABLE*) hash_element(&column_priv_hash,
index);
if (!(user=grant_table->user))
user="";
if (!(host=grant_table->host))
host="";
if (!strcmp(lex_user->user.str,user) &&
!my_strcasecmp(&my_charset_latin1, lex_user->host.str, host))
{
want_access=grant_table->privs;
if ((want_access | grant_table->cols) != 0)
{
String global(buff,sizeof(buff),&my_charset_latin1);
global.length(0);
global.append("GRANT ",6);
if (test_all_bits(grant_table->privs,(TABLE_ACLS & ~GRANT_ACL)))
global.append("ALL PRIVILEGES",14);
else
{
int found=0;
ulong j,test_access= (want_access | grant_table->cols) & ~GRANT_ACL;
for (counter=0, j = SELECT_ACL;j <= TABLE_ACLS; counter++,j <<= 1)
{
if (test_access & j)
{
if (found)
global.append(", ",2);
found = 1;
global.append(command_array[counter],command_lengths[counter]);
if (grant_table->cols)
{
uint found_col=0;
for (uint col_index=0 ;
col_index < grant_table->hash_columns.records ;
col_index++)
{
GRANT_COLUMN *grant_column = (GRANT_COLUMN*)
hash_element(&grant_table->hash_columns,col_index);
if (grant_column->rights & j)
{
if (!found_col)
{
global.append(" (",2);
found_col=1;
}
else
global.append(", ",2);
global.append(grant_column->column,
grant_column->key_length);
}
}
if (found_col)
global.append(')');
}
}
}
}
global.append(" ON ",4);
global.append(grant_table->db);
global.append(".",1);
global.append(grant_table->tname);
global.append(" TO '",5);
global.append(lex_user->user.str,lex_user->user.length);
global.append("'@'",3);
global.append(lex_user->host.str,lex_user->host.length);
global.append('\'');
if (want_access & GRANT_ACL)
global.append(" WITH GRANT OPTION",18);
protocol->prepare_for_resend();
protocol->store(global.ptr(),global.length());
if (protocol->write())
{
error= -1;
break;
}
}
}
}
end:
VOID(pthread_mutex_unlock(&acl_cache->lock));
rw_unlock(&LOCK_grant);
send_eof(thd);
DBUG_RETURN(error);
}
/*
Make a clear-text version of the requested privilege.
*/
void get_privilege_desc(char *to, uint max_length, ulong access)
{
uint pos;
char *start=to;
DBUG_ASSERT(max_length >= 30); // For end ',' removal
if (access)
{
max_length--; // Reserve place for end-zero
for (pos=0 ; access ; pos++, access>>=1)
{
if ((access & 1) &&
command_lengths[pos] + (uint) (to-start) < max_length)
{
to= strmov(to, command_array[pos]);
*to++=',';
}
}
to--; // Remove end ','
}
*to=0;
}
void get_mqh(const char *user, const char *host, USER_CONN *uc)
{
ACL_USER *acl_user;
if (initialized && (acl_user= find_acl_user(host,user)))
uc->user_resources= acl_user->user_resource;
else
bzero((char*) &uc->user_resources, sizeof(uc->user_resources));
}
/*****************************************************************************
Instantiate used templates
*****************************************************************************/
#ifdef __GNUC__
template class List_iterator<LEX_COLUMN>;
template class List_iterator<LEX_USER>;
template class List<LEX_COLUMN>;
template class List<LEX_USER>;
#endif
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