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sql_acl.cc
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sql_acl.cc
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/* Copyright (c) 2000, 2018, Oracle and/or its affiliates.
Copyright (c) 2009, 2018, MariaDB
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; version 2 of the License.
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA */
/*
The privileges are saved in the following tables:
mysql/user ; super user who are allowed to do almost anything
mysql/host ; host privileges. 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 <my_global.h> /* NO_EMBEDDED_ACCESS_CHECKS */
#include "sql_priv.h"
#include "sql_acl.h" // MYSQL_DB_FIELD_COUNT, ACL_ACCESS
#include "sql_base.h" // close_mysql_tables
#include "key.h" // key_copy, key_cmp_if_same, key_restore
#include "sql_show.h" // append_identifier
#include "sql_table.h" // build_table_filename
#include "hash_filo.h"
#include "sql_parse.h" // check_access
#include "sql_view.h" // VIEW_ANY_ACL
#include "records.h" // READ_RECORD, read_record_info,
// init_read_record, end_read_record
#include "rpl_filter.h" // rpl_filter
#include "rpl_rli.h"
#include <m_ctype.h>
#include <stdarg.h>
#include "sp_head.h"
#include "sp.h"
#include "transaction.h"
#include "lock.h" // MYSQL_LOCK_IGNORE_TIMEOUT
#include <sql_common.h>
#include <mysql/plugin_auth.h>
#include "sql_connect.h"
#include "hostname.h"
#include "sql_db.h"
#include "sql_array.h"
#include "sql_hset.h"
#include "sql_plugin_compat.h"
bool mysql_user_table_is_in_short_password_format= false;
static const
TABLE_FIELD_TYPE mysql_db_table_fields[MYSQL_DB_FIELD_COUNT] = {
{
{ C_STRING_WITH_LEN("Host") },
{ C_STRING_WITH_LEN("char(60)") },
{NULL, 0}
},
{
{ C_STRING_WITH_LEN("Db") },
{ C_STRING_WITH_LEN("char(64)") },
{NULL, 0}
},
{
{ C_STRING_WITH_LEN("User") },
{ C_STRING_WITH_LEN("char(") },
{NULL, 0}
},
{
{ C_STRING_WITH_LEN("Select_priv") },
{ C_STRING_WITH_LEN("enum('N','Y')") },
{ C_STRING_WITH_LEN("utf8") }
},
{
{ C_STRING_WITH_LEN("Insert_priv") },
{ C_STRING_WITH_LEN("enum('N','Y')") },
{ C_STRING_WITH_LEN("utf8") }
},
{
{ C_STRING_WITH_LEN("Update_priv") },
{ C_STRING_WITH_LEN("enum('N','Y')") },
{ C_STRING_WITH_LEN("utf8") }
},
{
{ C_STRING_WITH_LEN("Delete_priv") },
{ C_STRING_WITH_LEN("enum('N','Y')") },
{ C_STRING_WITH_LEN("utf8") }
},
{
{ C_STRING_WITH_LEN("Create_priv") },
{ C_STRING_WITH_LEN("enum('N','Y')") },
{ C_STRING_WITH_LEN("utf8") }
},
{
{ C_STRING_WITH_LEN("Drop_priv") },
{ C_STRING_WITH_LEN("enum('N','Y')") },
{ C_STRING_WITH_LEN("utf8") }
},
{
{ C_STRING_WITH_LEN("Grant_priv") },
{ C_STRING_WITH_LEN("enum('N','Y')") },
{ C_STRING_WITH_LEN("utf8") }
},
{
{ C_STRING_WITH_LEN("References_priv") },
{ C_STRING_WITH_LEN("enum('N','Y')") },
{ C_STRING_WITH_LEN("utf8") }
},
{
{ C_STRING_WITH_LEN("Index_priv") },
{ C_STRING_WITH_LEN("enum('N','Y')") },
{ C_STRING_WITH_LEN("utf8") }
},
{
{ C_STRING_WITH_LEN("Alter_priv") },
{ C_STRING_WITH_LEN("enum('N','Y')") },
{ C_STRING_WITH_LEN("utf8") }
},
{
{ C_STRING_WITH_LEN("Create_tmp_table_priv") },
{ C_STRING_WITH_LEN("enum('N','Y')") },
{ C_STRING_WITH_LEN("utf8") }
},
{
{ C_STRING_WITH_LEN("Lock_tables_priv") },
{ C_STRING_WITH_LEN("enum('N','Y')") },
{ C_STRING_WITH_LEN("utf8") }
},
{
{ C_STRING_WITH_LEN("Create_view_priv") },
{ C_STRING_WITH_LEN("enum('N','Y')") },
{ C_STRING_WITH_LEN("utf8") }
},
{
{ C_STRING_WITH_LEN("Show_view_priv") },
{ C_STRING_WITH_LEN("enum('N','Y')") },
{ C_STRING_WITH_LEN("utf8") }
},
{
{ C_STRING_WITH_LEN("Create_routine_priv") },
{ C_STRING_WITH_LEN("enum('N','Y')") },
{ C_STRING_WITH_LEN("utf8") }
},
{
{ C_STRING_WITH_LEN("Alter_routine_priv") },
{ C_STRING_WITH_LEN("enum('N','Y')") },
{ C_STRING_WITH_LEN("utf8") }
},
{
{ C_STRING_WITH_LEN("Execute_priv") },
{ C_STRING_WITH_LEN("enum('N','Y')") },
{ C_STRING_WITH_LEN("utf8") }
},
{
{ C_STRING_WITH_LEN("Event_priv") },
{ C_STRING_WITH_LEN("enum('N','Y')") },
{ C_STRING_WITH_LEN("utf8") }
},
{
{ C_STRING_WITH_LEN("Trigger_priv") },
{ C_STRING_WITH_LEN("enum('N','Y')") },
{ C_STRING_WITH_LEN("utf8") }
}
};
const TABLE_FIELD_DEF
mysql_db_table_def= {MYSQL_DB_FIELD_COUNT, mysql_db_table_fields, 0, (uint*) 0 };
static LEX_STRING native_password_plugin_name= {
C_STRING_WITH_LEN("mysql_native_password")
};
static LEX_STRING old_password_plugin_name= {
C_STRING_WITH_LEN("mysql_old_password")
};
/// @todo make it configurable
LEX_STRING *default_auth_plugin_name= &native_password_plugin_name;
/*
Wildcard host, matches any hostname
*/
LEX_STRING host_not_specified= { C_STRING_WITH_LEN("%") };
/*
Constants, used in the SHOW GRANTS command.
Their actual string values are irrelevant, they're always compared
as pointers to these string constants.
*/
LEX_STRING current_user= { C_STRING_WITH_LEN("*current_user") };
LEX_STRING current_role= { C_STRING_WITH_LEN("*current_role") };
LEX_STRING current_user_and_current_role= { C_STRING_WITH_LEN("*current_user_and_current_role") };
#ifndef NO_EMBEDDED_ACCESS_CHECKS
static plugin_ref old_password_plugin;
#endif
static plugin_ref native_password_plugin;
static char *safe_str(char *str)
{ return str ? str : const_cast<char*>(""); }
static const char *safe_str(const char *str)
{ return str ? str : ""; }
/* Classes */
struct acl_host_and_ip
{
char *hostname;
long ip, ip_mask; // Used with masked ip:s
};
#ifndef NO_EMBEDDED_ACCESS_CHECKS
static bool compare_hostname(const acl_host_and_ip *, const char *, const char *);
#else
#define compare_hostname(X,Y,Z) 0
#endif
class ACL_ACCESS {
public:
ulong sort;
ulong access;
};
/* ACL_HOST is used if no host is specified */
class ACL_HOST :public ACL_ACCESS
{
public:
acl_host_and_ip host;
char *db;
};
class ACL_USER_BASE :public ACL_ACCESS
{
public:
static void *operator new(size_t size, MEM_ROOT *mem_root)
{ return (void*) alloc_root(mem_root, size); }
uchar flags; // field used to store various state information
LEX_STRING user;
/* list to hold references to granted roles (ACL_ROLE instances) */
DYNAMIC_ARRAY role_grants;
};
class ACL_USER :public ACL_USER_BASE
{
public:
acl_host_and_ip host;
uint hostname_length;
USER_RESOURCES user_resource;
uint8 salt[SCRAMBLE_LENGTH + 1]; // scrambled password in binary form
uint8 salt_len; // 0 - no password, 4 - 3.20, 8 - 4.0, 20 - 4.1.1
enum SSL_type ssl_type;
const char *ssl_cipher, *x509_issuer, *x509_subject;
LEX_STRING plugin;
LEX_STRING auth_string;
ACL_USER *copy(MEM_ROOT *root)
{
ACL_USER *dst= (ACL_USER *) alloc_root(root, sizeof(ACL_USER));
if (!dst)
return 0;
*dst= *this;
dst->user.str= safe_strdup_root(root, user.str);
dst->user.length= user.length;
dst->ssl_cipher= safe_strdup_root(root, ssl_cipher);
dst->x509_issuer= safe_strdup_root(root, x509_issuer);
dst->x509_subject= safe_strdup_root(root, x509_subject);
if (plugin.str == native_password_plugin_name.str ||
plugin.str == old_password_plugin_name.str)
dst->plugin= plugin;
else
dst->plugin.str= strmake_root(root, plugin.str, plugin.length);
dst->auth_string.str= safe_strdup_root(root, auth_string.str);
dst->host.hostname= safe_strdup_root(root, host.hostname);
bzero(&dst->role_grants, sizeof(role_grants));
return dst;
}
int cmp(const char *user2, const char *host2)
{
CHARSET_INFO *cs= system_charset_info;
int res;
res= strcmp(safe_str(user.str), safe_str(user2));
if (!res)
res= my_strcasecmp(cs, host.hostname, host2);
return res;
}
bool eq(const char *user2, const char *host2) { return !cmp(user2, host2); }
bool wild_eq(const char *user2, const char *host2, const char *ip2)
{
if (strcmp(safe_str(user.str), safe_str(user2)))
return false;
return compare_hostname(&host, host2, ip2 ? ip2 : host2);
}
};
class ACL_ROLE :public ACL_USER_BASE
{
public:
/*
In case of granting a role to a role, the access bits are merged together
via a bit OR operation and placed in the ACL_USER::access field.
When rebuilding role_grants via the rebuild_role_grant function,
the ACL_USER::access field needs to be reset first. The field
initial_role_access holds initial grants, as granted directly to the role
*/
ulong initial_role_access;
/*
In subgraph traversal, when we need to traverse only a part of the graph
(e.g. all direct and indirect grantees of a role X), the counter holds the
number of affected neighbour nodes.
See also propagate_role_grants()
*/
uint counter;
DYNAMIC_ARRAY parent_grantee; // array of backlinks to elements granted
ACL_ROLE(ACL_USER * user, MEM_ROOT *mem);
ACL_ROLE(const char * rolename, ulong privileges, MEM_ROOT *mem);
};
class ACL_DB :public ACL_ACCESS
{
public:
acl_host_and_ip host;
char *user,*db;
ulong initial_access; /* access bits present in the table */
};
#ifndef DBUG_OFF
/* status variables, only visible in SHOW STATUS after -#d,role_merge_stats */
ulong role_global_merges= 0, role_db_merges= 0, role_table_merges= 0,
role_column_merges= 0, role_routine_merges= 0;
#endif
#ifndef NO_EMBEDDED_ACCESS_CHECKS
static void update_hostname(acl_host_and_ip *host, const char *hostname);
static ulong get_sort(uint count,...);
static bool show_proxy_grants (THD *, const char *, const char *,
char *, size_t);
static bool show_role_grants(THD *, const char *, const char *,
ACL_USER_BASE *, char *, size_t);
static bool show_global_privileges(THD *, ACL_USER_BASE *,
bool, char *, size_t);
static bool show_database_privileges(THD *, const char *, const char *,
char *, size_t);
static bool show_table_and_column_privileges(THD *, const char *, const char *,
char *, size_t);
static int show_routine_grants(THD *, const char *, const char *, HASH *,
const char *, int, char *, int);
class ACL_PROXY_USER :public ACL_ACCESS
{
acl_host_and_ip host;
const char *user;
acl_host_and_ip proxied_host;
const char *proxied_user;
bool with_grant;
typedef enum {
MYSQL_PROXIES_PRIV_HOST,
MYSQL_PROXIES_PRIV_USER,
MYSQL_PROXIES_PRIV_PROXIED_HOST,
MYSQL_PROXIES_PRIV_PROXIED_USER,
MYSQL_PROXIES_PRIV_WITH_GRANT,
MYSQL_PROXIES_PRIV_GRANTOR,
MYSQL_PROXIES_PRIV_TIMESTAMP } old_acl_proxy_users;
public:
ACL_PROXY_USER () {};
void init(const char *host_arg, const char *user_arg,
const char *proxied_host_arg, const char *proxied_user_arg,
bool with_grant_arg)
{
user= (user_arg && *user_arg) ? user_arg : NULL;
update_hostname (&host, (host_arg && *host_arg) ? host_arg : NULL);
proxied_user= (proxied_user_arg && *proxied_user_arg) ?
proxied_user_arg : NULL;
update_hostname (&proxied_host,
(proxied_host_arg && *proxied_host_arg) ?
proxied_host_arg : NULL);
with_grant= with_grant_arg;
sort= get_sort(4, host.hostname, user, proxied_host.hostname, proxied_user);
}
void init(MEM_ROOT *mem, const char *host_arg, const char *user_arg,
const char *proxied_host_arg, const char *proxied_user_arg,
bool with_grant_arg)
{
init ((host_arg && *host_arg) ? strdup_root (mem, host_arg) : NULL,
(user_arg && *user_arg) ? strdup_root (mem, user_arg) : NULL,
(proxied_host_arg && *proxied_host_arg) ?
strdup_root (mem, proxied_host_arg) : NULL,
(proxied_user_arg && *proxied_user_arg) ?
strdup_root (mem, proxied_user_arg) : NULL,
with_grant_arg);
}
void init(TABLE *table, MEM_ROOT *mem)
{
init (get_field(mem, table->field[MYSQL_PROXIES_PRIV_HOST]),
get_field(mem, table->field[MYSQL_PROXIES_PRIV_USER]),
get_field(mem, table->field[MYSQL_PROXIES_PRIV_PROXIED_HOST]),
get_field(mem, table->field[MYSQL_PROXIES_PRIV_PROXIED_USER]),
table->field[MYSQL_PROXIES_PRIV_WITH_GRANT]->val_int() != 0);
}
bool get_with_grant() { return with_grant; }
const char *get_user() { return user; }
const char *get_host() { return host.hostname; }
const char *get_proxied_user() { return proxied_user; }
const char *get_proxied_host() { return proxied_host.hostname; }
void set_user(MEM_ROOT *mem, const char *user_arg)
{
user= user_arg && *user_arg ? strdup_root(mem, user_arg) : NULL;
}
void set_host(MEM_ROOT *mem, const char *host_arg)
{
update_hostname(&host, safe_strdup_root(mem, host_arg));
}
bool check_validity(bool check_no_resolve)
{
if (check_no_resolve &&
(hostname_requires_resolving(host.hostname) ||
hostname_requires_resolving(proxied_host.hostname)))
{
sql_print_warning("'proxies_priv' entry '%s@%s %s@%s' "
"ignored in --skip-name-resolve mode.",
safe_str(proxied_user),
safe_str(proxied_host.hostname),
safe_str(user),
safe_str(host.hostname));
return TRUE;
}
return FALSE;
}
bool matches(const char *host_arg, const char *user_arg, const char *ip_arg,
const char *proxied_user_arg)
{
DBUG_ENTER("ACL_PROXY_USER::matches");
DBUG_PRINT("info", ("compare_hostname(%s,%s,%s) &&"
"compare_hostname(%s,%s,%s) &&"
"wild_compare (%s,%s) &&"
"wild_compare (%s,%s)",
host.hostname, host_arg, ip_arg, proxied_host.hostname,
host_arg, ip_arg, user_arg, user,
proxied_user_arg, proxied_user));
DBUG_RETURN(compare_hostname(&host, host_arg, ip_arg) &&
compare_hostname(&proxied_host, host_arg, ip_arg) &&
(!user ||
(user_arg && !wild_compare(user_arg, user, TRUE))) &&
(!proxied_user ||
(proxied_user && !wild_compare(proxied_user_arg,
proxied_user, TRUE))));
}
inline static bool auth_element_equals(const char *a, const char *b)
{
return (a == b || (a != NULL && b != NULL && !strcmp(a,b)));
}
bool pk_equals(ACL_PROXY_USER *grant)
{
DBUG_ENTER("pk_equals");
DBUG_PRINT("info", ("strcmp(%s,%s) &&"
"strcmp(%s,%s) &&"
"wild_compare (%s,%s) &&"
"wild_compare (%s,%s)",
user, grant->user, proxied_user, grant->proxied_user,
host.hostname, grant->host.hostname,
proxied_host.hostname, grant->proxied_host.hostname));
bool res= auth_element_equals(user, grant->user) &&
auth_element_equals(proxied_user, grant->proxied_user) &&
auth_element_equals(host.hostname, grant->host.hostname) &&
auth_element_equals(proxied_host.hostname,
grant->proxied_host.hostname);
DBUG_RETURN(res);
}
bool granted_on(const char *host_arg, const char *user_arg)
{
return (((!user && (!user_arg || !user_arg[0])) ||
(user && user_arg && !strcmp(user, user_arg))) &&
((!host.hostname && (!host_arg || !host_arg[0])) ||
(host.hostname && host_arg && !strcmp(host.hostname, host_arg))));
}
void print_grant(String *str)
{
str->append(STRING_WITH_LEN("GRANT PROXY ON '"));
if (proxied_user)
str->append(proxied_user, strlen(proxied_user));
str->append(STRING_WITH_LEN("'@'"));
if (proxied_host.hostname)
str->append(proxied_host.hostname, strlen(proxied_host.hostname));
str->append(STRING_WITH_LEN("' TO '"));
if (user)
str->append(user, strlen(user));
str->append(STRING_WITH_LEN("'@'"));
if (host.hostname)
str->append(host.hostname, strlen(host.hostname));
str->append(STRING_WITH_LEN("'"));
if (with_grant)
str->append(STRING_WITH_LEN(" WITH GRANT OPTION"));
}
void set_data(ACL_PROXY_USER *grant)
{
with_grant= grant->with_grant;
}
static int store_pk(TABLE *table,
const LEX_STRING *host,
const LEX_STRING *user,
const LEX_STRING *proxied_host,
const LEX_STRING *proxied_user)
{
DBUG_ENTER("ACL_PROXY_USER::store_pk");
DBUG_PRINT("info", ("host=%s, user=%s, proxied_host=%s, proxied_user=%s",
host->str, user->str,
proxied_host->str, proxied_user->str));
if (table->field[MYSQL_PROXIES_PRIV_HOST]->store(host->str,
host->length,
system_charset_info))
DBUG_RETURN(TRUE);
if (table->field[MYSQL_PROXIES_PRIV_USER]->store(user->str,
user->length,
system_charset_info))
DBUG_RETURN(TRUE);
if (table->field[MYSQL_PROXIES_PRIV_PROXIED_HOST]->store(proxied_host->str,
proxied_host->length,
system_charset_info))
DBUG_RETURN(TRUE);
if (table->field[MYSQL_PROXIES_PRIV_PROXIED_USER]->store(proxied_user->str,
proxied_user->length,
system_charset_info))
DBUG_RETURN(TRUE);
DBUG_RETURN(FALSE);
}
static int store_data_record(TABLE *table,
const LEX_STRING *host,
const LEX_STRING *user,
const LEX_STRING *proxied_host,
const LEX_STRING *proxied_user,
bool with_grant,
const char *grantor)
{
DBUG_ENTER("ACL_PROXY_USER::store_pk");
if (store_pk(table, host, user, proxied_host, proxied_user))
DBUG_RETURN(TRUE);
DBUG_PRINT("info", ("with_grant=%s", with_grant ? "TRUE" : "FALSE"));
if (table->field[MYSQL_PROXIES_PRIV_WITH_GRANT]->store(with_grant ? 1 : 0,
TRUE))
DBUG_RETURN(TRUE);
if (table->field[MYSQL_PROXIES_PRIV_GRANTOR]->store(grantor,
strlen(grantor),
system_charset_info))
DBUG_RETURN(TRUE);
DBUG_RETURN(FALSE);
}
};
#define FIRST_NON_YN_FIELD 26
class acl_entry :public hash_filo_element
{
public:
ulong access;
uint16 length;
char key[1]; // Key will be stored here
};
static uchar* acl_entry_get_key(acl_entry *entry, size_t *length,
my_bool not_used __attribute__((unused)))
{
*length=(uint) entry->length;
return (uchar*) entry->key;
}
static uchar* acl_role_get_key(ACL_ROLE *entry, size_t *length,
my_bool not_used __attribute__((unused)))
{
*length=(uint) entry->user.length;
return (uchar*) entry->user.str;
}
struct ROLE_GRANT_PAIR : public Sql_alloc
{
char *u_uname;
char *u_hname;
char *r_uname;
LEX_STRING hashkey;
bool with_admin;
bool init(MEM_ROOT *mem, char *username, char *hostname, char *rolename,
bool with_admin_option);
};
static uchar* acl_role_map_get_key(ROLE_GRANT_PAIR *entry, size_t *length,
my_bool not_used __attribute__((unused)))
{
*length=(uint) entry->hashkey.length;
return (uchar*) entry->hashkey.str;
}
bool ROLE_GRANT_PAIR::init(MEM_ROOT *mem, char *username,
char *hostname, char *rolename,
bool with_admin_option)
{
if (!this)
return true;
size_t uname_l = username ? strlen(username) : 0;
size_t hname_l = hostname ? strlen(hostname) : 0;
size_t rname_l = rolename ? strlen(rolename) : 0;
/*
Create a buffer that holds all 3 NULL terminated strings in succession
To save memory space, the same buffer is used as the hashkey
*/
size_t bufflen = uname_l + hname_l + rname_l + 3; //add the '\0' aswell
char *buff= (char *)alloc_root(mem, bufflen);
if (!buff)
return true;
/*
Offsets in the buffer for all 3 strings
*/
char *username_pos= buff;
char *hostname_pos= buff + uname_l + 1;
char *rolename_pos= buff + uname_l + hname_l + 2;
if (username) //prevent undefined behaviour
memcpy(username_pos, username, uname_l);
username_pos[uname_l]= '\0'; //#1 string terminator
u_uname= username_pos;
if (hostname) //prevent undefined behaviour
memcpy(hostname_pos, hostname, hname_l);
hostname_pos[hname_l]= '\0'; //#2 string terminator
u_hname= hostname_pos;
if (rolename) //prevent undefined behaviour
memcpy(rolename_pos, rolename, rname_l);
rolename_pos[rname_l]= '\0'; //#3 string terminator
r_uname= rolename_pos;
hashkey.str = buff;
hashkey.length = bufflen;
with_admin= with_admin_option;
return false;
}
#define IP_ADDR_STRLEN (3 + 1 + 3 + 1 + 3 + 1 + 3)
#define ACL_KEY_LENGTH (IP_ADDR_STRLEN + 1 + NAME_LEN + \
1 + USERNAME_LENGTH + 1)
#if defined(HAVE_OPENSSL)
/*
Without SSL the handshake consists of one packet. This packet
has both client capabilities and scrambled password.
With SSL the handshake might consist of two packets. If the first
packet (client capabilities) has CLIENT_SSL flag set, we have to
switch to SSL and read the second packet. The scrambled password
is in the second packet and client_capabilities field will be ignored.
Maybe it is better to accept flags other than CLIENT_SSL from the
second packet?
*/
#define SSL_HANDSHAKE_SIZE 2
#define MIN_HANDSHAKE_SIZE 2
#else
#define MIN_HANDSHAKE_SIZE 6
#endif /* HAVE_OPENSSL && !EMBEDDED_LIBRARY */
#define NORMAL_HANDSHAKE_SIZE 6
#define ROLE_ASSIGN_COLUMN_IDX 43
/* various flags valid for ACL_USER */
#define IS_ROLE (1L << 0)
/* Flag to mark that a ROLE is on the recursive DEPTH_FIRST_SEARCH stack */
#define ROLE_ON_STACK (1L << 1)
/*
Flag to mark that a ROLE and all it's neighbours have
been visited
*/
#define ROLE_EXPLORED (1L << 2)
/* Flag to mark that on_node was already called for this role */
#define ROLE_OPENED (1L << 3)
static DYNAMIC_ARRAY acl_hosts, acl_users, acl_proxy_users;
static Dynamic_array<ACL_DB> acl_dbs(0U,50U);
typedef Dynamic_array<ACL_DB>::CMP_FUNC acl_dbs_cmp;
static HASH acl_roles;
/*
An hash containing mappings user <--> role
A hash is used so as to make updates quickly
The hashkey used represents all the entries combined
*/
static HASH acl_roles_mappings;
static MEM_ROOT acl_memroot, grant_memroot;
static bool initialized=0;
static bool allow_all_hosts=1;
static HASH acl_check_hosts, column_priv_hash, proc_priv_hash, func_priv_hash;
static DYNAMIC_ARRAY acl_wild_hosts;
static Hash_filo<acl_entry> *acl_cache;
static uint grant_version=0; /* Version of priv tables. incremented by acl_load */
static ulong get_access(TABLE *form,uint fieldnr, uint *next_field=0);
static bool check_is_role(TABLE *form);
static int acl_compare(ACL_ACCESS *a,ACL_ACCESS *b);
static ulong get_sort(uint count,...);
static void init_check_host(void);
static void rebuild_check_host(void);
static void rebuild_role_grants(void);
static ACL_USER *find_user_exact(const char *host, const char *user);
static ACL_USER *find_user_wild(const char *host, const char *user, const char *ip= 0);
static ACL_ROLE *find_acl_role(const char *user);
static ROLE_GRANT_PAIR *find_role_grant_pair(const LEX_STRING *u, const LEX_STRING *h, const LEX_STRING *r);
static ACL_USER_BASE *find_acl_user_base(const char *user, const char *host);
static bool update_user_table(THD *, TABLE *, const char *, const char *, const
char *, uint, bool);
static my_bool acl_load(THD *thd, TABLE_LIST *tables);
static my_bool grant_load(THD *thd, TABLE_LIST *tables);
static inline void get_grantor(THD *thd, char* grantor);
static bool add_role_user_mapping(const char *uname, const char *hname, const char *rname);
#define ROLE_CYCLE_FOUND 2
static int traverse_role_graph_up(ACL_ROLE *, void *,
int (*) (ACL_ROLE *, void *),
int (*) (ACL_ROLE *, ACL_ROLE *, void *));
static int traverse_role_graph_down(ACL_USER_BASE *, void *,
int (*) (ACL_USER_BASE *, void *),
int (*) (ACL_USER_BASE *, ACL_ROLE *, void *));
/*
Enumeration of various ACL's and Hashes used in handle_grant_struct()
*/
enum enum_acl_lists
{
USER_ACL= 0,
ROLE_ACL,
DB_ACL,
COLUMN_PRIVILEGES_HASH,
PROC_PRIVILEGES_HASH,
FUNC_PRIVILEGES_HASH,
PROXY_USERS_ACL,
ROLES_MAPPINGS_HASH
};
ACL_ROLE::ACL_ROLE(ACL_USER *user, MEM_ROOT *root) : counter(0)
{
access= user->access;
/* set initial role access the same as the table row privileges */
initial_role_access= user->access;
this->user.str= safe_strdup_root(root, user->user.str);
this->user.length= user->user.length;
bzero(&role_grants, sizeof(role_grants));
bzero(&parent_grantee, sizeof(parent_grantee));
flags= IS_ROLE;
}
ACL_ROLE::ACL_ROLE(const char * rolename, ulong privileges, MEM_ROOT *root) :
initial_role_access(privileges), counter(0)
{
this->access= initial_role_access;
this->user.str= safe_strdup_root(root, rolename);
this->user.length= strlen(rolename);
bzero(&role_grants, sizeof(role_grants));
bzero(&parent_grantee, sizeof(parent_grantee));
flags= IS_ROLE;
}
static bool is_invalid_role_name(const char *str)
{
if (*str && strcasecmp(str, "PUBLIC") && strcasecmp(str, "NONE"))
return false;
my_error(ER_INVALID_ROLE, MYF(0), str);
return true;
}
static void free_acl_user(ACL_USER *user)
{
delete_dynamic(&(user->role_grants));
}
static void free_acl_role(ACL_ROLE *role)
{
delete_dynamic(&(role->role_grants));
delete_dynamic(&(role->parent_grantee));
}
/**
Convert scrambled password to binary form, according to scramble type,
Binary form is stored in user.salt.
@param acl_user The object where to store the salt
@param password The password hash containing the salt
@param password_len The length of the password hash
Despite the name of the function it is used when loading ACLs from disk
to store the password hash in the ACL_USER object.
*/
static void
set_user_salt(ACL_USER *acl_user, const char *password, uint password_len)
{
if (password_len == SCRAMBLED_PASSWORD_CHAR_LENGTH)
{
get_salt_from_password(acl_user->salt, password);
acl_user->salt_len= SCRAMBLE_LENGTH;
}
else if (password_len == SCRAMBLED_PASSWORD_CHAR_LENGTH_323)
{
get_salt_from_password_323((ulong *) acl_user->salt, password);
acl_user->salt_len= SCRAMBLE_LENGTH_323;
}
else
acl_user->salt_len= 0;
}
static char *fix_plugin_ptr(char *name)
{
if (my_strcasecmp(system_charset_info, name,
native_password_plugin_name.str) == 0)
return native_password_plugin_name.str;
else
if (my_strcasecmp(system_charset_info, name,
old_password_plugin_name.str) == 0)
return old_password_plugin_name.str;
else
return name;
}
/**
Fix a LEX_STRING *plugin pointer to point to a hard-coded string,
if appropriate
Make sure that if ACL_USER's plugin is a built-in, then it points
to a hard coded string, not to an allocated copy. Run-time, for
authentication, we want to be able to detect built-ins by comparing
pointers, not strings.
@retval 0 the pointers were fixed
@retval 1 this ACL_USER uses a not built-in plugin
*/
static bool fix_user_plugin_ptr(LEX_STRING *plugin_ptr)
{
DBUG_ASSERT(plugin_ptr);
if (my_strcasecmp(system_charset_info, plugin_ptr->str,
native_password_plugin_name.str) == 0)
*plugin_ptr= native_password_plugin_name;
else
if (my_strcasecmp(system_charset_info, plugin_ptr->str,
old_password_plugin_name.str) == 0)
*plugin_ptr= old_password_plugin_name;
else
return true;
return false;
}
static bool get_YN_as_bool(Field *field)
{
char buff[2];
String res(buff,sizeof(buff),&my_charset_latin1);
field->val_str(&res);
return res[0] == 'Y' || res[0] == 'y';
}
/*
Initialize structures responsible for user/db-level privilege checking and
load privilege information for them from tables in the 'mysql' database.
SYNOPSIS
acl_init()
dont_read_acl_tables TRUE if we want to skip loading data from
privilege tables and disable privilege checking.
NOTES
This function is mostly responsible for preparatory steps, main work
on initialization and grants loading is done in acl_reload().
RETURN VALUES
0 ok
1 Could not initialize grant's
*/
my_bool acl_init(bool dont_read_acl_tables)
{
THD *thd;
my_bool return_val;
DBUG_ENTER("acl_init");
acl_cache= new Hash_filo<acl_entry>(ACL_CACHE_SIZE, 0, 0,
(my_hash_get_key) acl_entry_get_key,
(my_hash_free_key) free,
&my_charset_utf8_bin);
/*
cache built-in native authentication plugins,
to avoid hash searches and a global mutex lock on every connect
*/
native_password_plugin= my_plugin_lock_by_name(0,
&native_password_plugin_name, MYSQL_AUTHENTICATION_PLUGIN);
old_password_plugin= my_plugin_lock_by_name(0,
&old_password_plugin_name, MYSQL_AUTHENTICATION_PLUGIN);
if (!native_password_plugin || !old_password_plugin)
DBUG_RETURN(1);
if (dont_read_acl_tables)
{
DBUG_RETURN(0); /* purecov: tested */
}
/*
To be able to run this from boot, we allocate a temporary THD
*/
if (!(thd=new THD))
DBUG_RETURN(1); /* purecov: inspected */
thd->thread_stack= (char*) &thd;
thd->store_globals();
/*
It is safe to call acl_reload() since acl_* arrays and hashes which
will be freed there are global static objects and thus are initialized
by zeros at startup.
*/
return_val= acl_reload(thd);
delete thd;
DBUG_RETURN(return_val);
}
/**
Check if the password length provided matches supported native formats.
*/
static bool password_length_valid(int password_length)
{
switch (password_length)
{
case 0: /* no password */
case SCRAMBLED_PASSWORD_CHAR_LENGTH:
return TRUE;
case SCRAMBLED_PASSWORD_CHAR_LENGTH_323:
return TRUE;
default:
return FALSE;
}
}
/**
Choose from either native or old password plugins when assigning a password
*/
static bool set_user_plugin (ACL_USER *user, int password_len)
{
switch (password_len)
{
case 0: /* no password */
case SCRAMBLED_PASSWORD_CHAR_LENGTH:
user->plugin= native_password_plugin_name;
return FALSE;
case SCRAMBLED_PASSWORD_CHAR_LENGTH_323:
user->plugin= old_password_plugin_name;
return FALSE;
default:
sql_print_warning("Found invalid password for user: '%s@%s'; "
"Ignoring user", safe_str(user->user.str),