-
Notifications
You must be signed in to change notification settings - Fork 390
/
validation.go
294 lines (235 loc) · 8.77 KB
/
validation.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
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
// Copyright (C) 2019 Storj Labs, Inc.
// See LICENSE for copying information.
package metainfo
import (
"bytes"
"context"
"crypto/subtle"
"regexp"
"time"
"github.com/zeebo/errs"
"go.uber.org/zap"
"golang.org/x/time/rate"
"storj.io/common/encryption"
"storj.io/common/macaroon"
"storj.io/common/pb"
"storj.io/common/rpc/rpcstatus"
"storj.io/common/storj"
"storj.io/common/uuid"
"storj.io/storj/satellite/console"
"storj.io/storj/satellite/console/consoleauth"
)
var (
ipRegexp = regexp.MustCompile(`^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$`)
)
func getAPIKey(ctx context.Context, header *pb.RequestHeader) (key *macaroon.APIKey, err error) {
defer mon.Task()(&ctx)(&err)
if header != nil {
return macaroon.ParseRawAPIKey(header.ApiKey)
}
keyData, ok := consoleauth.GetAPIKey(ctx)
if !ok {
return nil, errs.New("missing credentials")
}
return macaroon.ParseAPIKey(string(keyData))
}
// validateAuth validates things like API key, user permissions and rate limit and always returns valid rpc error.
func (endpoint *Endpoint) validateAuth(ctx context.Context, header *pb.RequestHeader, action macaroon.Action) (_ *console.APIKeyInfo, err error) {
defer mon.Task()(&ctx)(&err)
key, keyInfo, err := endpoint.validateBasic(ctx, header)
if err != nil {
return nil, err
}
err = key.Check(ctx, keyInfo.Secret, action, endpoint.revocations)
if err != nil {
endpoint.log.Debug("unauthorized request", zap.Error(err))
return nil, rpcstatus.Error(rpcstatus.PermissionDenied, "Unauthorized API credentials")
}
return keyInfo, nil
}
func (endpoint *Endpoint) validateBasic(ctx context.Context, header *pb.RequestHeader) (_ *macaroon.APIKey, _ *console.APIKeyInfo, err error) {
defer mon.Task()(&ctx)(&err)
key, err := getAPIKey(ctx, header)
if err != nil {
endpoint.log.Debug("invalid request", zap.Error(err))
return nil, nil, rpcstatus.Error(rpcstatus.InvalidArgument, "Invalid API credentials")
}
keyInfo, err := endpoint.apiKeys.GetByHead(ctx, key.Head())
if err != nil {
endpoint.log.Debug("unauthorized request", zap.Error(err))
return nil, nil, rpcstatus.Error(rpcstatus.PermissionDenied, "Unauthorized API credentials")
}
if err = endpoint.checkRate(ctx, keyInfo.ProjectID); err != nil {
endpoint.log.Debug("rate check failed", zap.Error(err))
return nil, nil, err
}
return key, keyInfo, nil
}
func (endpoint *Endpoint) validateRevoke(ctx context.Context, header *pb.RequestHeader, macToRevoke *macaroon.Macaroon) (_ *console.APIKeyInfo, err error) {
defer mon.Task()(&ctx)(&err)
key, keyInfo, err := endpoint.validateBasic(ctx, header)
if err != nil {
return nil, err
}
// The macaroon to revoke must be valid with the same secret as the key.
if !macToRevoke.Validate(keyInfo.Secret) {
return nil, rpcstatus.Error(rpcstatus.InvalidArgument, "Macaroon to revoke invalid")
}
keyTail := key.Tail()
tails := macToRevoke.Tails(keyInfo.Secret)
// A macaroon cannot revoke itself. So we only check len(tails-1), skipping
// the final tail. To be valid, the final tail of the auth key must be
// contained within the checked tails of the macaroon we want to revoke.
for i := 0; i < len(tails)-1; i++ {
if subtle.ConstantTimeCompare(tails[i], keyTail) == 1 {
return keyInfo, nil
}
}
return nil, rpcstatus.Error(rpcstatus.PermissionDenied, "Unauthorized attempt to revoke macaroon")
}
func (endpoint *Endpoint) checkRate(ctx context.Context, projectID uuid.UUID) (err error) {
defer mon.Task()(&ctx)(&err)
if !endpoint.config.RateLimiter.Enabled {
return nil
}
limiter, err := endpoint.limiterCache.Get(projectID.String(), func() (interface{}, error) {
limit := rate.Limit(endpoint.config.RateLimiter.Rate)
project, err := endpoint.projects.Get(ctx, projectID)
if err != nil {
return false, err
}
if project.RateLimit != nil && *project.RateLimit > 0 {
limit = rate.Limit(*project.RateLimit)
}
// initialize the limiter with limit and burst the same so that we don't limit how quickly calls
// are made within the second.
return rate.NewLimiter(limit, int(limit)), nil
})
if err != nil {
return rpcstatus.Error(rpcstatus.Unavailable, err.Error())
}
if !limiter.(*rate.Limiter).Allow() {
endpoint.log.Warn("too many requests for project",
zap.Stringer("projectID", projectID),
zap.Float64("limit", float64(limiter.(*rate.Limiter).Limit())))
mon.Event("metainfo_rate_limit_exceeded") //mon:locked
return rpcstatus.Error(rpcstatus.ResourceExhausted, "Too Many Requests")
}
return nil
}
func (endpoint *Endpoint) validateBucket(ctx context.Context, bucket []byte) (err error) {
defer mon.Task()(&ctx)(&err)
if len(bucket) == 0 {
return Error.Wrap(storj.ErrNoBucket.New(""))
}
if len(bucket) < 3 || len(bucket) > 63 {
return Error.New("bucket name must be at least 3 and no more than 63 characters long")
}
// Regexp not used because benchmark shows it will be slower for valid bucket names
// https://gist.github.com/mniewrzal/49de3af95f36e63e88fac24f565e444c
labels := bytes.Split(bucket, []byte("."))
for _, label := range labels {
err = validateBucketLabel(label)
if err != nil {
return err
}
}
if ipRegexp.MatchString(string(bucket)) {
return Error.New("bucket name cannot be formatted as an IP address")
}
return nil
}
func validateBucketLabel(label []byte) error {
if len(label) == 0 {
return Error.New("bucket label cannot be empty")
}
if !isLowerLetter(label[0]) && !isDigit(label[0]) {
return Error.New("bucket label must start with a lowercase letter or number")
}
if label[0] == '-' || label[len(label)-1] == '-' {
return Error.New("bucket label cannot start or end with a hyphen")
}
for i := 1; i < len(label)-1; i++ {
if !isLowerLetter(label[i]) && !isDigit(label[i]) && (label[i] != '-') && (label[i] != '.') {
return Error.New("bucket name must contain only lowercase letters, numbers or hyphens")
}
}
return nil
}
func isLowerLetter(r byte) bool {
return r >= 'a' && r <= 'z'
}
func isDigit(r byte) bool {
return r >= '0' && r <= '9'
}
func (endpoint *Endpoint) validatePointer(ctx context.Context, pointer *pb.Pointer, originalLimits []*pb.OrderLimit) (err error) {
defer mon.Task()(&ctx)(&err)
if pointer == nil {
return Error.New("no pointer specified")
}
if pointer.Type == pb.Pointer_INLINE && pointer.Remote != nil {
return Error.New("pointer type is INLINE but remote segment is set")
}
if pointer.Type == pb.Pointer_REMOTE {
switch {
case pointer.Remote == nil:
return Error.New("no remote segment specified")
case pointer.Remote.RemotePieces == nil:
return Error.New("no remote segment pieces specified")
case pointer.Remote.Redundancy == nil:
return Error.New("no redundancy scheme specified")
}
remote := pointer.Remote
if len(originalLimits) == 0 {
return Error.New("no order limits")
}
if int32(len(originalLimits)) != remote.Redundancy.Total {
return Error.New("invalid no order limit for piece")
}
maxAllowed, err := encryption.CalcEncryptedSize(endpoint.config.MaxSegmentSize.Int64(), storj.EncryptionParameters{
CipherSuite: storj.EncAESGCM,
BlockSize: 128, // intentionally low block size to allow maximum possible encryption overhead
})
if err != nil {
return err
}
if pointer.SegmentSize > maxAllowed || pointer.SegmentSize < 0 {
return Error.New("segment size %v is out of range, maximum allowed is %v", pointer.SegmentSize, maxAllowed)
}
pieceNums := make(map[int32]struct{})
nodeIds := make(map[storj.NodeID]struct{})
for _, piece := range remote.RemotePieces {
if piece.PieceNum >= int32(len(originalLimits)) {
return Error.New("invalid piece number")
}
limit := originalLimits[piece.PieceNum]
if limit == nil {
return Error.New("empty order limit for piece")
}
err := endpoint.orders.VerifyOrderLimitSignature(ctx, limit)
if err != nil {
return err
}
// expect that too much time has not passed between order limit creation and now
if time.Since(limit.OrderCreation) > endpoint.config.MaxCommitInterval {
return Error.New("Segment not committed before max commit interval of %f minutes.", endpoint.config.MaxCommitInterval.Minutes())
}
derivedPieceID := remote.RootPieceId.Derive(piece.NodeId, piece.PieceNum)
if limit.PieceId.IsZero() || limit.PieceId != derivedPieceID {
return Error.New("invalid order limit piece id")
}
if piece.NodeId != limit.StorageNodeId {
return Error.New("piece NodeID != order limit NodeID")
}
if _, ok := pieceNums[piece.PieceNum]; ok {
return Error.New("piece num %d is duplicated", piece.PieceNum)
}
if _, ok := nodeIds[piece.NodeId]; ok {
return Error.New("node id %s for piece num %d is duplicated", piece.NodeId.String(), piece.PieceNum)
}
pieceNums[piece.PieceNum] = struct{}{}
nodeIds[piece.NodeId] = struct{}{}
}
}
return nil
}