1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
/*--------------------------------------------------------------------------
*
* test_rls_hooks.c
* Code for testing RLS hooks.
*
* Copyright (c) 2015-2022, PostgreSQL Global Development Group
*
* IDENTIFICATION
* src/test/modules/test_rls_hooks/test_rls_hooks.c
*
* -------------------------------------------------------------------------
*/
#include "postgres.h"
#include "catalog/pg_type.h"
#include "fmgr.h"
#include "miscadmin.h"
#include "nodes/makefuncs.h"
#include "parser/parse_clause.h"
#include "parser/parse_collate.h"
#include "parser/parse_node.h"
#include "parser/parse_relation.h"
#include "rewrite/rowsecurity.h"
#include "test_rls_hooks.h"
#include "utils/acl.h"
#include "utils/rel.h"
#include "utils/relcache.h"
PG_MODULE_MAGIC;
void _PG_init(void);
/* Install hooks */
void
_PG_init(void)
{
/* Set our hooks */
row_security_policy_hook_permissive = test_rls_hooks_permissive;
row_security_policy_hook_restrictive = test_rls_hooks_restrictive;
}
/*
* Return permissive policies to be added
*/
List *
test_rls_hooks_permissive(CmdType cmdtype, Relation relation)
{
List *policies = NIL;
RowSecurityPolicy *policy = palloc0(sizeof(RowSecurityPolicy));
Datum role;
FuncCall *n;
Node *e;
ColumnRef *c;
ParseState *qual_pstate;
ParseNamespaceItem *nsitem;
if (strcmp(RelationGetRelationName(relation), "rls_test_permissive") != 0 &&
strcmp(RelationGetRelationName(relation), "rls_test_both") != 0)
return NIL;
qual_pstate = make_parsestate(NULL);
nsitem = addRangeTableEntryForRelation(qual_pstate,
relation, AccessShareLock,
NULL, false, false);
addNSItemToQuery(qual_pstate, nsitem, false, true, true);
role = ObjectIdGetDatum(ACL_ID_PUBLIC);
policy->policy_name = pstrdup("extension policy");
policy->polcmd = '*';
policy->roles = construct_array(&role, 1, OIDOID, sizeof(Oid), true, TYPALIGN_INT);
/*
* policy->qual = (Expr *) makeConst(BOOLOID, -1, InvalidOid,
* sizeof(bool), BoolGetDatum(true), false, true);
*/
n = makeFuncCall(list_make2(makeString("pg_catalog"),
makeString("current_user")),
NIL,
COERCE_EXPLICIT_CALL,
-1);
c = makeNode(ColumnRef);
c->fields = list_make1(makeString("username"));
c->location = 0;
e = (Node *) makeSimpleA_Expr(AEXPR_OP, "=", (Node *) n, (Node *) c, 0);
policy->qual = (Expr *) transformWhereClause(qual_pstate, copyObject(e),
EXPR_KIND_POLICY,
"POLICY");
/* Fix up collation information */
assign_expr_collations(qual_pstate, (Node *) policy->qual);
policy->with_check_qual = copyObject(policy->qual);
policy->hassublinks = false;
policies = list_make1(policy);
return policies;
}
/*
* Return restrictive policies to be added
*
* Note that a permissive policy must exist or the default-deny policy
* will be included and nothing will be visible. If no filtering should
* be done except for the restrictive policy, then a single "USING (true)"
* permissive policy can be used; see the regression tests.
*/
List *
test_rls_hooks_restrictive(CmdType cmdtype, Relation relation)
{
List *policies = NIL;
RowSecurityPolicy *policy = palloc0(sizeof(RowSecurityPolicy));
Datum role;
FuncCall *n;
Node *e;
ColumnRef *c;
ParseState *qual_pstate;
ParseNamespaceItem *nsitem;
if (strcmp(RelationGetRelationName(relation), "rls_test_restrictive") != 0 &&
strcmp(RelationGetRelationName(relation), "rls_test_both") != 0)
return NIL;
qual_pstate = make_parsestate(NULL);
nsitem = addRangeTableEntryForRelation(qual_pstate,
relation, AccessShareLock,
NULL, false, false);
addNSItemToQuery(qual_pstate, nsitem, false, true, true);
role = ObjectIdGetDatum(ACL_ID_PUBLIC);
policy->policy_name = pstrdup("extension policy");
policy->polcmd = '*';
policy->roles = construct_array(&role, 1, OIDOID, sizeof(Oid), true, TYPALIGN_INT);
n = makeFuncCall(list_make2(makeString("pg_catalog"),
makeString("current_user")),
NIL,
COERCE_EXPLICIT_CALL,
-1);
c = makeNode(ColumnRef);
c->fields = list_make1(makeString("supervisor"));
c->location = 0;
e = (Node *) makeSimpleA_Expr(AEXPR_OP, "=", (Node *) n, (Node *) c, 0);
policy->qual = (Expr *) transformWhereClause(qual_pstate, copyObject(e),
EXPR_KIND_POLICY,
"POLICY");
/* Fix up collation information */
assign_expr_collations(qual_pstate, (Node *) policy->qual);
policy->with_check_qual = copyObject(policy->qual);
policy->hassublinks = false;
policies = list_make1(policy);
return policies;
}
|
