summaryrefslogtreecommitdiffstats
path: root/netwerk/cookie/Cookie.cpp
blob: b2dcf439f1c8d2aa27e62272cb6d30b0b2d47b65 (plain)
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
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "Cookie.h"
#include "CookieStorage.h"
#include "mozilla/Encoding.h"
#include "mozilla/dom/ToJSValue.h"
#include "mozilla/glean/GleanMetrics.h"
#include "mozilla/StaticPrefs_network.h"
#include "nsIURLParser.h"
#include "nsURLHelper.h"
#include <cstdlib>

namespace mozilla {
namespace net {

/******************************************************************************
 * Cookie:
 * creation helper
 ******************************************************************************/

// This is a counter that keeps track of the last used creation time, each time
// we create a new Cookie. This is nominally the time (in microseconds) the
// cookie was created, but is guaranteed to be monotonically increasing for
// cookies added at runtime after the database has been read in. This is
// necessary to enforce ordering among cookies whose creation times would
// otherwise overlap, since it's possible two cookies may be created at the
// same time, or that the system clock isn't monotonic.
static int64_t gLastCreationTime;

int64_t Cookie::GenerateUniqueCreationTime(int64_t aCreationTime) {
  // Check if the creation time given to us is greater than the running maximum
  // (it should always be monotonically increasing).
  if (aCreationTime > gLastCreationTime) {
    gLastCreationTime = aCreationTime;
    return aCreationTime;
  }

  // Make up our own.
  return ++gLastCreationTime;
}

already_AddRefed<Cookie> Cookie::Create(
    const CookieStruct& aCookieData,
    const OriginAttributes& aOriginAttributes) {
  RefPtr<Cookie> cookie =
      Cookie::FromCookieStruct(aCookieData, aOriginAttributes);

  // If the creationTime given to us is higher than the running maximum,
  // update our maximum.
  if (cookie->mData.creationTime() > gLastCreationTime) {
    gLastCreationTime = cookie->mData.creationTime();
  }

  return cookie.forget();
}

already_AddRefed<Cookie> Cookie::FromCookieStruct(
    const CookieStruct& aCookieData,
    const OriginAttributes& aOriginAttributes) {
  RefPtr<Cookie> cookie = new Cookie(aCookieData, aOriginAttributes);

  // Ensure mValue contains a valid UTF-8 sequence. Otherwise XPConnect will
  // truncate the string after the first invalid octet.
  UTF_8_ENCODING->DecodeWithoutBOMHandling(aCookieData.value(),
                                           cookie->mData.value());

  // If sameSite/rawSameSite values aren't sensible reset to Default
  // cf. 5.4.7 in draft-ietf-httpbis-rfc6265bis-09
  if (!Cookie::ValidateSameSite(cookie->mData)) {
    cookie->mData.sameSite() = nsICookie::SAMESITE_LAX;
    cookie->mData.rawSameSite() = nsICookie::SAMESITE_NONE;
  }

  return cookie.forget();
}

already_AddRefed<Cookie> Cookie::CreateValidated(
    const CookieStruct& aCookieData,
    const OriginAttributes& aOriginAttributes) {
  if (!StaticPrefs::network_cookie_fixup_on_db_load()) {
    return Cookie::Create(aCookieData, aOriginAttributes);
  }

  RefPtr<Cookie> cookie =
      Cookie::FromCookieStruct(aCookieData, aOriginAttributes);

  int64_t currentTimeInUsec = PR_Now();
  // Assert that the last creation time is not higher than the current time.
  // The 10000 wiggle room accounts for the fact that calling
  // GenerateUniqueCreationTime might go over the value of PR_Now(), but we'd
  // most likely not add 10000 cookies in a row.
  MOZ_ASSERT(gLastCreationTime < currentTimeInUsec + 10000,
             "Last creation time must not be higher than NOW");

  // If the creationTime given to us is higher than the current time then
  // update the creation time to now.
  if (cookie->mData.creationTime() > currentTimeInUsec) {
    uint64_t diffInSeconds =
        (cookie->mData.creationTime() - currentTimeInUsec) / PR_USEC_PER_SEC;
    mozilla::glean::networking::cookie_creation_fixup_diff.AccumulateSamples(
        {diffInSeconds});
    glean::networking::cookie_timestamp_fixed_count.Get("creationTime"_ns)
        .Add(1);

    cookie->mData.creationTime() =
        GenerateUniqueCreationTime(currentTimeInUsec);
  }

  if (cookie->mData.lastAccessed() > currentTimeInUsec) {
    uint64_t diffInSeconds =
        (cookie->mData.lastAccessed() - currentTimeInUsec) / PR_USEC_PER_SEC;
    mozilla::glean::networking::cookie_access_fixup_diff.AccumulateSamples(
        {diffInSeconds});
    glean::networking::cookie_timestamp_fixed_count.Get("lastAccessed"_ns)
        .Add(1);

    cookie->mData.lastAccessed() = currentTimeInUsec;
  }

  return cookie.forget();
}

size_t Cookie::SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const {
  return aMallocSizeOf(this) +
         mData.name().SizeOfExcludingThisIfUnshared(MallocSizeOf) +
         mData.value().SizeOfExcludingThisIfUnshared(MallocSizeOf) +
         mData.host().SizeOfExcludingThisIfUnshared(MallocSizeOf) +
         mData.path().SizeOfExcludingThisIfUnshared(MallocSizeOf) +
         mFilePathCache.SizeOfExcludingThisIfUnshared(MallocSizeOf);
}

bool Cookie::IsStale() const {
  int64_t currentTimeInUsec = PR_Now();

  return currentTimeInUsec - LastAccessed() >
         StaticPrefs::network_cookie_staleThreshold() * PR_USEC_PER_SEC;
}

/******************************************************************************
 * Cookie:
 * xpcom impl
 ******************************************************************************/

// xpcom getters
NS_IMETHODIMP Cookie::GetName(nsACString& aName) {
  aName = Name();
  return NS_OK;
}
NS_IMETHODIMP Cookie::GetValue(nsACString& aValue) {
  aValue = Value();
  return NS_OK;
}
NS_IMETHODIMP Cookie::GetHost(nsACString& aHost) {
  aHost = Host();
  return NS_OK;
}
NS_IMETHODIMP Cookie::GetRawHost(nsACString& aHost) {
  aHost = RawHost();
  return NS_OK;
}
NS_IMETHODIMP Cookie::GetPath(nsACString& aPath) {
  aPath = Path();
  return NS_OK;
}
NS_IMETHODIMP Cookie::GetExpiry(int64_t* aExpiry) {
  *aExpiry = Expiry();
  return NS_OK;
}
NS_IMETHODIMP Cookie::GetIsSession(bool* aIsSession) {
  *aIsSession = IsSession();
  return NS_OK;
}
NS_IMETHODIMP Cookie::GetIsDomain(bool* aIsDomain) {
  *aIsDomain = IsDomain();
  return NS_OK;
}
NS_IMETHODIMP Cookie::GetIsSecure(bool* aIsSecure) {
  *aIsSecure = IsSecure();
  return NS_OK;
}
NS_IMETHODIMP Cookie::GetIsHttpOnly(bool* aHttpOnly) {
  *aHttpOnly = IsHttpOnly();
  return NS_OK;
}
NS_IMETHODIMP Cookie::GetCreationTime(int64_t* aCreation) {
  *aCreation = CreationTime();
  return NS_OK;
}
NS_IMETHODIMP Cookie::GetLastAccessed(int64_t* aTime) {
  *aTime = LastAccessed();
  return NS_OK;
}
NS_IMETHODIMP Cookie::GetSameSite(int32_t* aSameSite) {
  if (StaticPrefs::network_cookie_sameSite_laxByDefault()) {
    *aSameSite = SameSite();
  } else {
    *aSameSite = RawSameSite();
  }
  return NS_OK;
}
NS_IMETHODIMP Cookie::GetSchemeMap(nsICookie::schemeType* aSchemeMap) {
  *aSchemeMap = static_cast<nsICookie::schemeType>(SchemeMap());
  return NS_OK;
}

NS_IMETHODIMP
Cookie::GetOriginAttributes(JSContext* aCx, JS::MutableHandle<JS::Value> aVal) {
  if (NS_WARN_IF(!ToJSValue(aCx, mOriginAttributes, aVal))) {
    return NS_ERROR_FAILURE;
  }
  return NS_OK;
}

const Cookie& Cookie::AsCookie() { return *this; }

const nsCString& Cookie::GetFilePath() {
  MOZ_DIAGNOSTIC_ASSERT(NS_IsMainThread());

  if (Path().IsEmpty()) {
    // If we don't have a path, just return the (empty) file path cache.
    return mFilePathCache;
  }
  if (!mFilePathCache.IsEmpty()) {
    // If we've computed the answer before, just return it.
    return mFilePathCache;
  }

  nsIURLParser* parser = net_GetStdURLParser();
  NS_ENSURE_TRUE(parser, mFilePathCache);

  int32_t pathLen = Path().Length();
  int32_t filepathLen = 0;
  uint32_t filepathPos = 0;

  nsresult rv = parser->ParsePath(PromiseFlatCString(Path()).get(), pathLen,
                                  &filepathPos, &filepathLen, nullptr,
                                  nullptr,            // don't care about query
                                  nullptr, nullptr);  // don't care about ref
  NS_ENSURE_SUCCESS(rv, mFilePathCache);

  mFilePathCache = Substring(Path(), filepathPos, filepathLen);

  return mFilePathCache;
}

// compatibility method, for use with the legacy nsICookie interface.
// here, expires == 0 denotes a session cookie.
NS_IMETHODIMP
Cookie::GetExpires(uint64_t* aExpires) {
  if (IsSession()) {
    *aExpires = 0;
  } else {
    *aExpires = Expiry() > 0 ? Expiry() : 1;
  }
  return NS_OK;
}

// static
bool Cookie::ValidateSameSite(const CookieStruct& aCookieData) {
  // For proper migration towards a laxByDefault world,
  // sameSite is initialized to LAX even though the server
  // has never sent it.
  if (aCookieData.rawSameSite() == aCookieData.sameSite()) {
    return aCookieData.rawSameSite() >= nsICookie::SAMESITE_NONE &&
           aCookieData.rawSameSite() <= nsICookie::SAMESITE_STRICT;
  }
  return aCookieData.rawSameSite() == nsICookie::SAMESITE_NONE &&
         aCookieData.sameSite() == nsICookie::SAMESITE_LAX;
}

already_AddRefed<Cookie> Cookie::Clone() const {
  return Create(mData, OriginAttributesRef());
}

NS_IMPL_ISUPPORTS(Cookie, nsICookie)

}  // namespace net
}  // namespace mozilla