forked from hashicorp/vault
-
Notifications
You must be signed in to change notification settings - Fork 0
/
mysql.go
201 lines (165 loc) · 4.35 KB
/
mysql.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
package mysql
import (
"database/sql"
"strings"
"time"
"github.com/hashicorp/vault/api"
"github.com/hashicorp/vault/builtin/logical/database/dbplugin"
"github.com/hashicorp/vault/helper/strutil"
"github.com/hashicorp/vault/plugins"
"github.com/hashicorp/vault/plugins/helper/database/connutil"
"github.com/hashicorp/vault/plugins/helper/database/credsutil"
"github.com/hashicorp/vault/plugins/helper/database/dbutil"
)
const (
defaultMysqlRevocationStmts = `
REVOKE ALL PRIVILEGES, GRANT OPTION FROM '{{name}}'@'%';
DROP USER '{{name}}'@'%'
`
mySQLTypeName = "mysql"
)
var (
DisplayNameLen int = 10
LegacyDisplayNameLen int = 4
UsernameLen int = 32
LegacyUsernameLen int = 16
)
type MySQL struct {
connutil.ConnectionProducer
credsutil.CredentialsProducer
}
// New implements builtinplugins.BuiltinFactory
func New(displayLen, usernameLen int) func() (interface{}, error) {
return func() (interface{}, error) {
connProducer := &connutil.SQLConnectionProducer{}
connProducer.Type = mySQLTypeName
credsProducer := &credsutil.SQLCredentialsProducer{
DisplayNameLen: displayLen,
UsernameLen: usernameLen,
}
dbType := &MySQL{
ConnectionProducer: connProducer,
CredentialsProducer: credsProducer,
}
return dbType, nil
}
}
// Run instantiates a MySQL object, and runs the RPC server for the plugin
func Run(apiTLSConfig *api.TLSConfig) error {
f := New(DisplayNameLen, UsernameLen)
dbType, err := f()
if err != nil {
return err
}
plugins.Serve(dbType.(*MySQL), apiTLSConfig)
return nil
}
func (m *MySQL) Type() (string, error) {
return mySQLTypeName, nil
}
func (m *MySQL) getConnection() (*sql.DB, error) {
db, err := m.Connection()
if err != nil {
return nil, err
}
return db.(*sql.DB), nil
}
func (m *MySQL) CreateUser(statements dbplugin.Statements, usernamePrefix string, expiration time.Time) (username string, password string, err error) {
// Grab the lock
m.Lock()
defer m.Unlock()
// Get the connection
db, err := m.getConnection()
if err != nil {
return "", "", err
}
if statements.CreationStatements == "" {
return "", "", dbutil.ErrEmptyCreationStatement
}
username, err = m.GenerateUsername(usernamePrefix)
if err != nil {
return "", "", err
}
password, err = m.GeneratePassword()
if err != nil {
return "", "", err
}
expirationStr, err := m.GenerateExpiration(expiration)
if err != nil {
return "", "", err
}
// Start a transaction
tx, err := db.Begin()
if err != nil {
return "", "", err
}
defer tx.Rollback()
// Execute each query
for _, query := range strutil.ParseArbitraryStringSlice(statements.CreationStatements, ";") {
query = strings.TrimSpace(query)
if len(query) == 0 {
continue
}
stmt, err := tx.Prepare(dbutil.QueryHelper(query, map[string]string{
"name": username,
"password": password,
"expiration": expirationStr,
}))
if err != nil {
return "", "", err
}
defer stmt.Close()
if _, err := stmt.Exec(); err != nil {
return "", "", err
}
}
// Commit the transaction
if err := tx.Commit(); err != nil {
return "", "", err
}
return username, password, nil
}
// NOOP
func (m *MySQL) RenewUser(statements dbplugin.Statements, username string, expiration time.Time) error {
return nil
}
func (m *MySQL) RevokeUser(statements dbplugin.Statements, username string) error {
// Grab the read lock
m.Lock()
defer m.Unlock()
// Get the connection
db, err := m.getConnection()
if err != nil {
return err
}
revocationStmts := statements.RevocationStatements
// Use a default SQL statement for revocation if one cannot be fetched from the role
if revocationStmts == "" {
revocationStmts = defaultMysqlRevocationStmts
}
// Start a transaction
tx, err := db.Begin()
if err != nil {
return err
}
defer tx.Rollback()
for _, query := range strutil.ParseArbitraryStringSlice(revocationStmts, ";") {
query = strings.TrimSpace(query)
if len(query) == 0 {
continue
}
// This is not a prepared statement because not all commands are supported
// 1295: This command is not supported in the prepared statement protocol yet
// Reference https://mariadb.com/kb/en/mariadb/prepare-statement/
query = strings.Replace(query, "{{name}}", username, -1)
_, err = tx.Exec(query)
if err != nil {
return err
}
}
// Commit the transaction
if err := tx.Commit(); err != nil {
return err
}
return nil
}