forked from hashicorp/vault
/
cassandra.go
242 lines (197 loc) · 5.93 KB
/
cassandra.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
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
package cassandra
import (
"context"
"strings"
"time"
"github.com/gocql/gocql"
multierror "github.com/hashicorp/go-multierror"
"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/credsutil"
"github.com/hashicorp/vault/plugins/helper/database/dbutil"
)
const (
defaultUserCreationCQL = `CREATE USER '{{username}}' WITH PASSWORD '{{password}}' NOSUPERUSER;`
defaultUserDeletionCQL = `DROP USER '{{username}}';`
defaultRootCredentialRotationCQL = `ALTER USER {{username}} WITH PASSWORD '{{password}}';`
cassandraTypeName = "cassandra"
)
var _ dbplugin.Database = &Cassandra{}
// Cassandra is an implementation of Database interface
type Cassandra struct {
*cassandraConnectionProducer
credsutil.CredentialsProducer
}
// New returns a new Cassandra instance
func New() (interface{}, error) {
db := new()
dbType := dbplugin.NewDatabaseErrorSanitizerMiddleware(db, db.secretValues)
return dbType, nil
}
func new() *Cassandra {
connProducer := &cassandraConnectionProducer{}
connProducer.Type = cassandraTypeName
credsProducer := &credsutil.SQLCredentialsProducer{
DisplayNameLen: 15,
RoleNameLen: 15,
UsernameLen: 100,
Separator: "_",
}
return &Cassandra{
cassandraConnectionProducer: connProducer,
CredentialsProducer: credsProducer,
}
}
// Run instantiates a Cassandra object, and runs the RPC server for the plugin
func Run(apiTLSConfig *api.TLSConfig) error {
dbType, err := New()
if err != nil {
return err
}
plugins.Serve(dbType.(dbplugin.Database), apiTLSConfig)
return nil
}
// Type returns the TypeName for this backend
func (c *Cassandra) Type() (string, error) {
return cassandraTypeName, nil
}
func (c *Cassandra) getConnection(ctx context.Context) (*gocql.Session, error) {
session, err := c.Connection(ctx)
if err != nil {
return nil, err
}
return session.(*gocql.Session), nil
}
// CreateUser generates the username/password on the underlying Cassandra secret backend as instructed by
// the CreationStatement provided.
func (c *Cassandra) CreateUser(ctx context.Context, statements dbplugin.Statements, usernameConfig dbplugin.UsernameConfig, expiration time.Time) (username string, password string, err error) {
// Grab the lock
c.Lock()
defer c.Unlock()
statements = dbutil.StatementCompatibilityHelper(statements)
// Get the connection
session, err := c.getConnection(ctx)
if err != nil {
return "", "", err
}
creationCQL := statements.Creation
if len(creationCQL) == 0 {
creationCQL = []string{defaultUserCreationCQL}
}
rollbackCQL := statements.Rollback
if len(rollbackCQL) == 0 {
rollbackCQL = []string{defaultUserDeletionCQL}
}
username, err = c.GenerateUsername(usernameConfig)
username = strings.Replace(username, "-", "_", -1)
if err != nil {
return "", "", err
}
// Cassandra doesn't like the uppercase usernames
username = strings.ToLower(username)
password, err = c.GeneratePassword()
if err != nil {
return "", "", err
}
// Execute each query
for _, stmt := range creationCQL {
for _, query := range strutil.ParseArbitraryStringSlice(stmt, ";") {
query = strings.TrimSpace(query)
if len(query) == 0 {
continue
}
err = session.Query(dbutil.QueryHelper(query, map[string]string{
"username": username,
"password": password,
})).WithContext(ctx).Exec()
if err != nil {
for _, stmt := range rollbackCQL {
for _, query := range strutil.ParseArbitraryStringSlice(stmt, ";") {
query = strings.TrimSpace(query)
if len(query) == 0 {
continue
}
session.Query(dbutil.QueryHelper(query, map[string]string{
"username": username,
})).WithContext(ctx).Exec()
}
}
return "", "", err
}
}
}
return username, password, nil
}
// RenewUser is not supported on Cassandra, so this is a no-op.
func (c *Cassandra) RenewUser(ctx context.Context, statements dbplugin.Statements, username string, expiration time.Time) error {
// NOOP
return nil
}
// RevokeUser attempts to drop the specified user.
func (c *Cassandra) RevokeUser(ctx context.Context, statements dbplugin.Statements, username string) error {
// Grab the lock
c.Lock()
defer c.Unlock()
statements = dbutil.StatementCompatibilityHelper(statements)
session, err := c.getConnection(ctx)
if err != nil {
return err
}
revocationCQL := statements.Revocation
if len(revocationCQL) == 0 {
revocationCQL = []string{defaultUserDeletionCQL}
}
var result *multierror.Error
for _, stmt := range revocationCQL {
for _, query := range strutil.ParseArbitraryStringSlice(stmt, ";") {
query = strings.TrimSpace(query)
if len(query) == 0 {
continue
}
err := session.Query(dbutil.QueryHelper(query, map[string]string{
"username": username,
})).WithContext(ctx).Exec()
result = multierror.Append(result, err)
}
}
return result.ErrorOrNil()
}
func (c *Cassandra) RotateRootCredentials(ctx context.Context, statements []string) (map[string]interface{}, error) {
// Grab the lock
c.Lock()
defer c.Unlock()
session, err := c.getConnection(ctx)
if err != nil {
return nil, err
}
rotateCQL := statements
if len(rotateCQL) == 0 {
rotateCQL = []string{defaultRootCredentialRotationCQL}
}
password, err := c.GeneratePassword()
if err != nil {
return nil, err
}
var result *multierror.Error
for _, stmt := range rotateCQL {
for _, query := range strutil.ParseArbitraryStringSlice(stmt, ";") {
query = strings.TrimSpace(query)
if len(query) == 0 {
continue
}
err := session.Query(dbutil.QueryHelper(query, map[string]string{
"username": c.Username,
"password": password,
})).WithContext(ctx).Exec()
result = multierror.Append(result, err)
}
}
err = result.ErrorOrNil()
if err != nil {
return nil, err
}
c.rawConfig["password"] = password
return c.rawConfig, nil
}