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Bug#16297 In memory grant tables not flushed when users's hostname is ""

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- In function 'handle_grant_struct' when searching the memory structures for an 
   entry to modify, convert all entries here host.hostname is NULL to "" and compare that 
   with the host passed in argument "user_from".
 - A user created with hostname "" is stored in "mysql.user" table as host="" but when loaded into 
   memory it'll be stored as host.hostname NULL. Specifiying "" as hostname means
   that "any host" can connect. Thus is's correct to turn on allow_all_hosts
   when such a user is found. 
 - Review and fix other places where host.hostname may be NULL.
This commit is contained in:
msvensson@neptunus.(none)
2006-05-23 11:35:14 +02:00
parent f60f757689
commit 7b2e709fb7
3 changed files with 412 additions and 56 deletions
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112
sql/sql_acl.cc
View File

@ -225,7 +225,8 @@ static my_bool acl_load(THD *thd, TABLE_LIST *tables)
"case that has been forced to lowercase because "
"lower_case_table_names is set. It will not be "
"possible to remove this privilege using REVOKE.",
host.host.hostname, host.db);
host.host.hostname ? host.host.hostname : "",
host.db ? host.db : "");
}
host.access= get_access(table,2);
host.access= fix_rights_for_db(host.access);
@ -234,7 +235,8 @@ static my_bool acl_load(THD *thd, TABLE_LIST *tables)
{
sql_print_warning("'host' entry '%s|%s' "
"ignored in --skip-name-resolve mode.",
host.host.hostname, host.db?host.db:"");
host.host.hostname ? host.host.hostname : "",
host.db ? host.db : "");
continue;
}
#ifndef TO_BE_REMOVED
@ -304,7 +306,8 @@ static my_bool acl_load(THD *thd, TABLE_LIST *tables)
{
sql_print_warning("'user' entry '%s@%s' "
"ignored in --skip-name-resolve mode.",
user.user, user.host.hostname);
user.user ? user.user : "",
user.host.hostname ? user.host.hostname : "");
continue;
}
@ -413,8 +416,8 @@ static my_bool acl_load(THD *thd, TABLE_LIST *tables)
#endif
}
VOID(push_dynamic(&acl_users,(gptr) &user));
if (!user.host.hostname || user.host.hostname[0] == wild_many &&
!user.host.hostname[1])
if (!user.host.hostname ||
(user.host.hostname[0] == wild_many && !user.host.hostname[1]))
allow_all_hosts=1; // Anyone can connect
}
}
@ -440,7 +443,9 @@ static my_bool acl_load(THD *thd, TABLE_LIST *tables)
{
sql_print_warning("'db' entry '%s %s@%s' "
"ignored in --skip-name-resolve mode.",
db.db, db.user, db.host.hostname);
db.db,
db.user ? db.user : "",
db.host.hostname ? db.host.hostname : "");
continue;
}
db.access=get_access(table,3);
@ -459,7 +464,9 @@ static my_bool acl_load(THD *thd, TABLE_LIST *tables)
"case that has been forced to lowercase because "
"lower_case_table_names is set. It will not be "
"possible to remove this privilege using REVOKE.",
db.db, db.user, db.host.hostname, db.host.hostname);
db.db,
db.user ? db.user : "",
db.host.hostname ? db.host.hostname : "");
}
}
db.sort=get_sort(3,db.host.hostname,db.db,db.user);
@ -1029,8 +1036,7 @@ static void acl_update_user(const char *user, const char *host,
{
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))
acl_user->user && !strcmp(user,acl_user->user))
{
if (!acl_user->host.hostname && !host[0] ||
acl_user->host.hostname &&
@ -1090,8 +1096,8 @@ static void acl_insert_user(const char *user, const char *host,
set_user_salt(&acl_user, password, password_len);
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])
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);
@ -1149,7 +1155,7 @@ static void acl_insert_db(const char *user, const char *host, const char *db,
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));
update_hostname(&acl_db.host, *host ? strdup_root(&mem,host) : 0);
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);
@ -1534,11 +1540,10 @@ find_acl_user(const char *host, const char *user, my_bool exact)
{
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 ? acl_user->user : "",
host,
acl_user->host.hostname ? acl_user->host.hostname :
""));
user, acl_user->user ? acl_user->user : "",
host,
acl_user->host.hostname ? acl_user->host.hostname :
""));
if (!acl_user->user && !user[0] ||
acl_user->user && !strcmp(user,acl_user->user))
{
@ -1588,7 +1593,7 @@ static const char *calc_ip(const char *ip, long *val, char end)
static void update_hostname(acl_host_and_ip *host, const char *hostname)
{
host->hostname=(char*) hostname; // This will not be modified!
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'))))
@ -1608,8 +1613,8 @@ static bool compare_hostname(const acl_host_and_ip *host, const char *hostname,
}
return (!host->hostname ||
(hostname && !wild_case_compare(system_charset_info,
hostname,host->hostname)) ||
(ip && !wild_compare(ip,host->hostname,0)));
hostname, host->hostname)) ||
(ip && !wild_compare(ip, host->hostname, 0)));
}
bool hostname_requires_resolving(const char *hostname)
@ -3352,8 +3357,10 @@ static my_bool grant_load(TABLE_LIST *tables)
{
sql_print_warning("'tables_priv' entry '%s %s@%s' "
"ignored in --skip-name-resolve mode.",
mem_check->tname, mem_check->user,
mem_check->host, mem_check->host);
mem_check->tname,
mem_check->user ? mem_check->user : "",
mem_check->host.hostname ?
mem_check->host.hostname : "");
continue;
}
}
@ -3391,7 +3398,8 @@ static my_bool grant_load(TABLE_LIST *tables)
sql_print_warning("'procs_priv' entry '%s %s@%s' "
"ignored in --skip-name-resolve mode.",
mem_check->tname, mem_check->user,
mem_check->host);
mem_check->host.hostname ?
mem_check->host.hostname : "");
continue;
}
}
@ -4091,11 +4099,6 @@ bool mysql_show_grants(THD *thd,LEX_USER *lex_user)
DBUG_RETURN(TRUE);
}
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)
{
@ -4308,16 +4311,17 @@ bool mysql_show_grants(THD *thd,LEX_USER *lex_user)
/* Add table & column access */
for (index=0 ; index < column_priv_hash.records ; index++)
{
const char *user;
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.hostname))
host= "";
if (!strcmp(lex_user->user.str,user) &&
!my_strcasecmp(system_charset_info, lex_user->host.str,
grant_table->host.hostname))
!my_strcasecmp(system_charset_info, lex_user->host.str, host))
{
ulong table_access= grant_table->privs;
if ((table_access | grant_table->cols) != 0)
@ -4444,15 +4448,16 @@ static int show_routine_grants(THD* thd, LEX_USER *lex_user, HASH *hash,
/* Add routine access */
for (index=0 ; index < hash->records ; index++)
{
const char *user;
const char *user, *host;
GRANT_NAME *grant_proc= (GRANT_NAME*) hash_element(hash, index);
if (!(user=grant_proc->user))
user= "";
if (!(host= grant_proc->host.hostname))
host= "";
if (!strcmp(lex_user->user.str,user) &&
!my_strcasecmp(system_charset_info, lex_user->host.str,
grant_proc->host.hostname))
!my_strcasecmp(system_charset_info, lex_user->host.str, host))
{
ulong proc_access= grant_proc->privs;
if (proc_access != 0)
@ -4922,35 +4927,30 @@ static int handle_grant_struct(uint struct_no, bool drop,
{
/*
Get a pointer to the element.
Unfortunaltely, the host default differs for the structures.
*/
switch (struct_no) {
case 0:
acl_user= dynamic_element(&acl_users, idx, ACL_USER*);
user= acl_user->user;
if (!(host= acl_user->host.hostname))
host= "%";
break;
host= acl_user->host.hostname;
break;
case 1:
acl_db= dynamic_element(&acl_dbs, idx, ACL_DB*);
user= acl_db->user;
if (!(host= acl_db->host.hostname))
host= "%";
host= acl_db->host.hostname;
break;
case 2:
grant_name= (GRANT_NAME*) hash_element(&column_priv_hash, idx);
user= grant_name->user;
if (!(host= grant_name->host.hostname))
host= "%";
host= grant_name->host.hostname;
break;
case 3:
grant_name= (GRANT_NAME*) hash_element(&proc_priv_hash, idx);
user= grant_name->user;
if (!(host= grant_name->host.hostname))
host= "%";
host= grant_name->host.hostname;
break;
}
if (! user)
@ -5541,8 +5541,10 @@ bool sp_revoke_privileges(THD *thd, const char *sp_db, const char *sp_name,
LEX_USER lex_user;
lex_user.user.str= grant_proc->user;
lex_user.user.length= strlen(grant_proc->user);
lex_user.host.str= grant_proc->host.hostname;
lex_user.host.length= strlen(grant_proc->host.hostname);
lex_user.host.str= grant_proc->host.hostname ?
grant_proc->host.hostname : (char*)"";
lex_user.host.length= grant_proc->host.hostname ?
strlen(grant_proc->host.hostname) : 0;
if (!replace_routine_table(thd,grant_proc,tables[4].table,lex_user,
grant_proc->db, grant_proc->tname,
is_proc, ~(ulong)0, 1))
@ -5832,16 +5834,17 @@ int fill_schema_table_privileges(THD *thd, TABLE_LIST *tables, COND *cond)
for (index=0 ; index < column_priv_hash.records ; index++)
{
const char *user, *is_grantable= "YES";
const char *user, *host, *is_grantable= "YES";
GRANT_TABLE *grant_table= (GRANT_TABLE*) hash_element(&column_priv_hash,
index);
if (!(user=grant_table->user))
user= "";
if (!(host= grant_table->host.hostname))
host= "";
if (no_global_access &&
(strcmp(thd->security_ctx->priv_user, user) ||
my_strcasecmp(system_charset_info, curr_host,
grant_table->host.hostname)))
my_strcasecmp(system_charset_info, curr_host, host)))
continue;
ulong table_access= grant_table->privs;
@ -5857,7 +5860,7 @@ int fill_schema_table_privileges(THD *thd, TABLE_LIST *tables, COND *cond)
if (!(table_access & GRANT_ACL))
is_grantable= "NO";
strxmov(buff,"'",user,"'@'",grant_table->host.hostname,"'",NullS);
strxmov(buff, "'", user, "'@'", host, "'", NullS);
if (!test_access)
update_schema_privilege(table, buff, grant_table->db, grant_table->tname,
0, 0, STRING_WITH_LEN("USAGE"), is_grantable);
@ -5894,16 +5897,17 @@ int fill_schema_column_privileges(THD *thd, TABLE_LIST *tables, COND *cond)
for (index=0 ; index < column_priv_hash.records ; index++)
{
const char *user, *is_grantable= "YES";
const char *user, *host, *is_grantable= "YES";
GRANT_TABLE *grant_table= (GRANT_TABLE*) hash_element(&column_priv_hash,
index);
if (!(user=grant_table->user))
user= "";
if (!(host= grant_table->host.hostname))
host= "";
if (no_global_access &&
(strcmp(thd->security_ctx->priv_user, user) ||
my_strcasecmp(system_charset_info, curr_host,
grant_table->host.hostname)))
my_strcasecmp(system_charset_info, curr_host, host)))
continue;
ulong table_access= grant_table->cols;
@ -5913,7 +5917,7 @@ int fill_schema_column_privileges(THD *thd, TABLE_LIST *tables, COND *cond)
is_grantable= "NO";
ulong test_access= table_access & ~GRANT_ACL;
strxmov(buff,"'",user,"'@'",grant_table->host.hostname,"'",NullS);
strxmov(buff, "'", user, "'@'", host, "'", NullS);
if (!test_access)
continue;
else