Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Handle mismatched cookie chunk counts #463

Merged
merged 1 commit into from
May 10, 2022
Merged
Show file tree
Hide file tree
Changes from all commits
Commits
File filter

Filter by extension

Filter by extension

Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
18 changes: 14 additions & 4 deletions src/Microsoft.Owin/Infrastructure/ChunkingCookieManager.cs
Original file line number Diff line number Diff line change
Expand Up @@ -73,7 +73,7 @@ public string GetRequestCookie(IOwinContext context, string key)
if (chunksCount > 0)
{
bool quoted = false;
string[] chunks = new string[chunksCount];
var chunks = new List<string>(10); // chunksCount may be wrong, don't trust it.
for (int chunkId = 1; chunkId <= chunksCount; chunkId++)
{
string chunk = requestCookies[key + "C" + chunkId.ToString(CultureInfo.InvariantCulture)];
Expand All @@ -98,7 +98,8 @@ public string GetRequestCookie(IOwinContext context, string key)
quoted = true;
chunk = RemoveQuotes(chunk);
}
chunks[chunkId - 1] = chunk;

chunks.Add(chunk);
}
string merged = string.Join(string.Empty, chunks);
if (quoted)
Expand Down Expand Up @@ -236,13 +237,22 @@ public void DeleteCookie(IOwinContext context, string key, CookieOptions options
List<string> keys = new List<string>();
keys.Add(escapedKey + "=");

string requestCookie = context.Request.Cookies[key];
int chunks = ParseChunksCount(requestCookie);
var requestCookies = context.Request.Cookies;
var requestCookie = requestCookies[key];
long chunks = ParseChunksCount(requestCookie);
if (chunks > 0)
{
for (int i = 1; i <= chunks + 1; i++)
{
string subkey = escapedKey + "C" + i.ToString(CultureInfo.InvariantCulture);

// Only delete cookies we received. We received the chunk count cookie so we should have received the others too.
if (string.IsNullOrEmpty(requestCookies[subkey]))
{
chunks = i - 1;
break;
}

keys.Add(subkey + "=");
}
}
Expand Down
35 changes: 34 additions & 1 deletion tests/Microsoft.Owin.Tests/CookieChunkingTests.cs
Original file line number Diff line number Diff line change
Expand Up @@ -146,7 +146,7 @@ public void GetLargeChunkedCookieWithMissingChunk_ThrowingDisabled_NotReassemble
public void DeleteChunkedCookieWithOptions_AllDeleted()
{
IOwinContext context = new OwinContext();
context.Request.Headers.AppendValues("Cookie", "TestCookie=chunks:7");
context.Request.Headers.AppendValues("Cookie", "TestCookie=chunks:7;TestCookieC1=1;TestCookieC2=2;TestCookieC3=3;TestCookieC4=4;TestCookieC5=5;TestCookieC6=6;TestCookieC7=7");

new ChunkingCookieManager().DeleteCookie(context, "TestCookie", new CookieOptions() { Domain = "foo.com" });
var cookies = context.Response.Headers.GetValues("Set-Cookie");
Expand All @@ -163,5 +163,38 @@ public void DeleteChunkedCookieWithOptions_AllDeleted()
"TestCookieC7=; domain=foo.com; path=/; expires=Thu, 01-Jan-1970 00:00:00 GMT",
}, cookies);
}

[Fact]
public void DeleteChunkedCookieWithMissingRequestCookies_OnlyPresentCookiesDeleted()
{
IOwinContext context = new OwinContext();
context.Request.Headers.Append("Cookie", "TestCookie=chunks:7;TestCookieC1=1;TestCookieC2=2");
new ChunkingCookieManager().DeleteCookie(context, "TestCookie", new CookieOptions() { Domain = "foo.com", Secure = true });
var cookies = context.Response.Headers.GetValues("Set-Cookie");
Assert.Equal(3, cookies.Count);
Assert.Equal(new[]
{
"TestCookie=; domain=foo.com; path=/; expires=Thu, 01-Jan-1970 00:00:00 GMT; secure",
"TestCookieC1=; domain=foo.com; path=/; expires=Thu, 01-Jan-1970 00:00:00 GMT; secure",
"TestCookieC2=; domain=foo.com; path=/; expires=Thu, 01-Jan-1970 00:00:00 GMT; secure",
}, cookies);
}

[Fact]
public void DeleteChunkedCookieWithMissingRequestCookies_StopsAtMissingChunk()
{
IOwinContext context = new OwinContext();
// C3 is missing so we don't try to delete C4 either.
context.Request.Headers.Append("Cookie", "TestCookie=chunks:7;TestCookieC1=1;TestCookieC2=2;TestCookieC4=4");
new ChunkingCookieManager().DeleteCookie(context, "TestCookie", new CookieOptions() { Domain = "foo.com", Secure = true });
var cookies = context.Response.Headers.GetValues("Set-Cookie");
Assert.Equal(3, cookies.Count);
Assert.Equal(new[]
{
"TestCookie=; domain=foo.com; path=/; expires=Thu, 01-Jan-1970 00:00:00 GMT; secure",
"TestCookieC1=; domain=foo.com; path=/; expires=Thu, 01-Jan-1970 00:00:00 GMT; secure",
"TestCookieC2=; domain=foo.com; path=/; expires=Thu, 01-Jan-1970 00:00:00 GMT; secure",
}, cookies);
}
}
}