The only case where renego is supported is if we are a client and the
server sends a HelloRequest. That is still needed to support the renego
+ client auth hack in Chrome. Beyond that, no other forms of renego will
work.
The messy logic where the handshake loop is repurposed to send
HelloRequest and the extremely confusing tri-state s->renegotiate (which
makes SSL_renegotiate_pending a lie during the initial handshake as a
server) are now gone. The next change will further simplify things by
removing ssl->s3->renegotiate and the renego deferral logic. There's
also some server-only renegotiation checks that can go now.
Also clean up ssl3_read_bytes' HelloRequest handling. The old logic relied on
the handshake state machine to reject bad HelloRequests which... actually that
code probably lets you initiate renego by sending the first four bytes of a
ServerHello and expecting the peer to read it later.
BUG=429450
Change-Id: Ie0f87d0c2b94e13811fe8e22e810ab2ffc8efa6c
Reviewed-on: https://boringssl-review.googlesource.com/4824
Reviewed-by: Adam Langley <agl@google.com>
Now that WebRTC honors packet boundaries (https://crbug.com/447431), we
can start enforcing them correctly. Configuring read-ahead now does
nothing. Instead DTLS will always set "read-ahead" and also correctly
enforce packet boundaries when reading records. Add tests to ensure that
badly fragmented packets are ignored. Because such packets don't fail
the handshake, the tests work by injecting an alert in the front of the
handshake stream and ensuring the DTLS implementation ignores them.
ssl3_read_n can be be considerably unraveled now, but leave that for
future cleanup. For now, make it correct.
BUG=468889
Change-Id: I800cfabe06615af31c2ccece436ca52aed9fe899
Reviewed-on: https://boringssl-review.googlesource.com/4820
Reviewed-by: Adam Langley <agl@google.com>
Since we hope to eventually lose server-side renegotiation support
altogether, get the client-side version of those tests. We should have
had those anyway to test that the default is to allow it.
BUG=429450
Change-Id: I4a18f339b55f3f07d77e22e823141e10a12bc9ff
Reviewed-on: https://boringssl-review.googlesource.com/4780
Reviewed-by: Adam Langley <agl@google.com>
SSL_get_current_cipher is documented by upstream to return the cipher actually
being used. However, because it reads s->session, it returns information
pertaining to the session to be offered if queried before ServerHello or early
in an abbreviated handshake.
Logic around s->session needs more comprehensive cleanup but for just this
function, defining it to be the current outgoing cipher is close to the current
semantics but for fixing the initial state (s->session->cipher is populated
when sending CCS). Store it in the SSL_AEAD_CTX which seems a natural place to
associate state pertaining to a connection half.
BUG=484744
Change-Id: Ife8db27a16615d0dbb2aec65359537243e08af7c
Reviewed-on: https://boringssl-review.googlesource.com/4733
Reviewed-by: Adam Langley <agl@google.com>
As of crbug.com/484543, Chromium's SSLClientSocket is not sensitive to whether
renegotiation is enabled or not. Disable it by default and require consumers to
opt into enabling this protocol mistake.
BUG=429450
Change-Id: I2329068284dbb851da010ff1fd398df3d663bcc3
Reviewed-on: https://boringssl-review.googlesource.com/4723
Reviewed-by: Adam Langley <agl@google.com>
With DTLSv1_get_timeout de-ctrl-ified, the type checker complains about
OPENSSL_timeval. Existing callers all use the real timeval.
Now that OPENSSL_timeval is not included in any public structs, simply
forward-declare timeval itself in ssl.h and pull in winsock2.h in internal
headers.
Change-Id: Ieaf110e141578488048c28cdadb14881301a2ce1
Reviewed-on: https://boringssl-review.googlesource.com/4682
Reviewed-by: Adam Langley <agl@google.com>
This is a really dumb API wart. Now that we have a limited set of curves that
are all reasonable, the automatic logic should just always kick in. This makes
set_ecdh_auto a no-op and, instead of making it the first choice, uses it as
the fallback behavior should none of the older curve selection APIs be used.
Currently, by default, server sockets can only use the plain RSA key exchange.
BUG=481139
Change-Id: Iaabc82de766cd00968844a71aaac29bd59841cd4
Reviewed-on: https://boringssl-review.googlesource.com/4531
Reviewed-by: Adam Langley <agl@google.com>
This causes any unexpected handshake records to be met with a fatal
no_renegotiation alert.
In addition, restore the redundant version sanity-checks in the handshake state
machines. Some code would zero the version field as a hacky way to break the
handshake on renego. Those will be removed when switching to this API.
The spec allows for a non-fatal no_renegotiation alert, but ssl3_read_bytes
makes it difficult to find the end of a ClientHello and skip it entirely. Given
that OpenSSL goes out of its way to map non-fatal no_renegotiation alerts to
fatal ones, this seems probably fine. This avoids needing to account for
another source of the library consuming an unbounded number of bytes without
returning data up.
Change-Id: Ie5050d9c9350c29cfe32d03a3c991bdc1da9e0e4
Reviewed-on: https://boringssl-review.googlesource.com/4300
Reviewed-by: Adam Langley <agl@google.com>
A previous change in BoringSSL renamed ERR_print_errors_fp to
BIO_print_errors_fp as part of refactoring the code to improve the
layering of modules within BoringSSL. Rename it back for better
compatibility with code that was using the function under the original
name. Move its definition back to crypto/err using an implementation
that avoids depending on crypto/bio.
Change-Id: Iee7703bb1eb4a3d640aff6485712bea71d7c1052
Reviewed-on: https://boringssl-review.googlesource.com/4310
Reviewed-by: Adam Langley <agl@google.com>
Move the state to TestState rather than passing pointers to them everywhere.
Also move SSL_read and SSL_write retry loops into helper functions so they
aren't repeated everywhere. This also makes the SSL_write calls all
consistently account for partial writes.
Change-Id: I9bc083a03da6a77ab2fc03c29d4028435fc02620
Reviewed-on: https://boringssl-review.googlesource.com/4214
Reviewed-by: Adam Langley <agl@google.com>
Based on whether -false-start is passed, we expect SSL_CB_HANDSHAKE_DONE to or
not to fire. Also add a flag that asserts SSL_CB_HANDSHAKE_DONE does *not* fire
in any False Start test where the handshake fails after SSL_connect returns.
Change-Id: I6c5b960fff15e297531e15b16abe0b98be95bec8
Reviewed-on: https://boringssl-review.googlesource.com/4212
Reviewed-by: Adam Langley <agl@google.com>
This is in preparation for using RAII in the unit tests. Those tests are built
in Chromium as well, but Chromium does not have C++11 library support across
all its toolchains. Compiler support is available, so add a partial
reimplementation of std::unique_ptr and std::move under crypto/test/. The
scopers for the crypto/ library are also moved there while the ones for ssl/
stay in ssl/test/.
Change-Id: I38f769acbc16a870db34649928575c7314b6e9f6
Reviewed-on: https://boringssl-review.googlesource.com/4120
Reviewed-by: Adam Langley <agl@google.com>
MinGW on Linux needs lowercase include files. On Windows this doesn't
matter since the filesystems are case-insensitive, but building
BoringSSL on Linux with MinGW has case-sensitive filesystems.
Change-Id: Id9c120d819071b041341fbb978352812d6d073bc
Reviewed-on: https://boringssl-review.googlesource.com/4090
Reviewed-by: Adam Langley <agl@google.com>
Google C++ style allows these. It's also considerably less tedious and
error-prone than defining an out-of-line constructor.
Change-Id: Ib76ccf6079be383722433046ac5c5d796dd1f525
Reviewed-on: https://boringssl-review.googlesource.com/4111
Reviewed-by: Adam Langley <agl@google.com>
Noticed these as I was poking around.
Change-Id: I93833a152583feced374c9febf7485bec7abc1c7
Reviewed-on: https://boringssl-review.googlesource.com/3973
Reviewed-by: Adam Langley <agl@google.com>
This callback receives information about the ClientHello and can decide
whether or not to allow the handshake to continue.
Change-Id: I21be28335fa74fedb5b73a310ee24310670fc923
Reviewed-on: https://boringssl-review.googlesource.com/3721
Reviewed-by: Adam Langley <agl@google.com>
Test both asynchronous and synchronous versions. This callback is somewhat
different from others. It's NOT called a second time when the handshake is
resumed. This appears to be intentional and not a mismerge from the internal
patch. The caller is expected to set up any state before resuming the handshake
state machine.
Also test the early callback returning an error.
Change-Id: If5e6eddd7007ea5cdd7533b4238e456106b95cbd
Reviewed-on: https://boringssl-review.googlesource.com/3590
Reviewed-by: Adam Langley <agl@google.com>
This involves more synchronization with child exits as the kernel no longer
closes the pre-created pipes for free, but it works on Windows. As long as
TCP_NODELAY is set, the performance seems comparable. Though it does involve
dealing with graceful socket shutdown. I couldn't get that to work on Windows
without draining the socket; not even SO_LINGER worked. Current (untested)
theory is that Windows refuses to gracefully shutdown a socket if the peer
sends data after we've stopped reading.
cmd.ExtraFiles doesn't work on Windows; it doesn't use fds natively, so you
can't pass fds 4 and 5. (stdin/stdout/stderr are special slots in
CreateProcess.) We can instead use the syscall module directly and mark handles
as inheritable (and then pass the numerical values out-of-band), but that
requires synchronizing all of our shim.Start() calls and assuming no other
thread is spawning a process.
PROC_THREAD_ATTRIBUTE_HANDLE_LIST fixes threading problems, but requires
wrapping more syscalls. exec.Cmd also doesn't let us launch the process
ourselves. Plus it still requires every handle in the list be marked
inheritable, so it doesn't help if some other thread is launching a process
with bInheritHandles TRUE but NOT using PROC_THREAD_ATTRIBUTE_HANDLE_LIST.
(Like Go, though we can take syscall.ForkLock there.)
http://blogs.msdn.com/b/oldnewthing/archive/2011/12/16/10248328.aspx
The more natively Windows option seems to be named pipes, but that too requires
wrapping more system calls. (To be fair, that isn't too painful.) They also
involve a listening server, so we'd still have to synchronize with shim.Wait()
a la net.TCPListener.
Then there's DuplicateHandle, but then we need an out-of-band signal.
All in all, one cross-platform implementation with a TCP sockets seems
simplest.
Change-Id: I38233e309a0fa6814baf61e806732138902347c0
Reviewed-on: https://boringssl-review.googlesource.com/3563
Reviewed-by: Adam Langley <agl@google.com>
Upstream settled in this API, and it's also the one that we expect
internally and that third_party code will expect.
Change-Id: Id7af68cf0af1f2e4d9defd37bda2218d70e2aa7b
Reviewed-on: https://boringssl-review.googlesource.com/3542
Reviewed-by: Adam Langley <agl@google.com>
Also move BIO_print_errors_fp up a level so it's less repetitive. There's
enough exit points now that it doesn't seem like adding a separate return exit
code for each has held up. (Maybe there should be a macro that samples
__LINE__...)
Change-Id: I120e59caaa96185e80cf51ea801a5e1f149b1b39
Reviewed-on: https://boringssl-review.googlesource.com/3530
Reviewed-by: Adam Langley <agl@google.com>
Found while diagnosing some crashes and hangs in the malloc tests. This (and
the follow-up) get us further but does not quite let the malloc tests pass
quietly, even without valgrind. DTLS silently ignores some malloc failures
(confusion with silently dropping bad packets) which then translate to hangs.
Change-Id: Ief06a671e0973d09d2883432b89a86259e346653
Reviewed-on: https://boringssl-review.googlesource.com/3482
Reviewed-by: Adam Langley <agl@google.com>
False Start is the name it's known by now. Deprecate the old API and expose new
ones with the new name.
Change-Id: I32d307027e178fd7d9c0069686cc046f75fdbf6f
Reviewed-on: https://boringssl-review.googlesource.com/3481
Reviewed-by: Adam Langley <agl@google.com>
I found no users of this. We can restore it if needbe, but I don't expect
anyone to find it useful in its current form. The API is suspect for the same
reasons DTLSv1_listen was. An SSL object is stateful and assumes you already
have the endpoint separated out.
If we ever need it, server-side HelloVerifyRequest and DTLSv1_listen should be
implemented by a separate stateless listener that statelessly handles
cookieless ClientHello + HelloVerifyRequest. Once a ClientHello with a valid
cookie comes in, it sets up a stateful SSL object and passes control along to
that.
Change-Id: I86adc1dfb6a81bebe987784c36ad6634a9a1b120
Reviewed-on: https://boringssl-review.googlesource.com/3480
Reviewed-by: Adam Langley <agl@google.com>
We have a stateful object hanging off the SSL* now. May as well use it and
avoid having to remember to reset that.
Change-Id: I5fc5269aa9b158517dd551036e658afaa2ef9acd
Reviewed-on: https://boringssl-review.googlesource.com/3349
Reviewed-by: Adam Langley <agl@google.com>
It's currently a mix of GoogleCPlusPlusStyle and unix_hacker_style. Since it's
now been thoroughly C++-ified, let's go with the former. This also matches the
tool, our other bit of C++ code.
Change-Id: Ie90a166006aae3b8f41628dbb35fcd64e99205df
Reviewed-on: https://boringssl-review.googlesource.com/3348
Reviewed-by: Adam Langley <agl@google.com>
Start exercising the various async callbacks, starting with channel ID. These
will run under the existing state machine coverage tests; -async will also
enable every asynchronous callback we can.
Change-Id: I173148d93d3a9c575b3abc3e2aceb77968b88f0e
Reviewed-on: https://boringssl-review.googlesource.com/3342
Reviewed-by: Adam Langley <agl@google.com>
bssl_shim rather needs it. It doesn't even free the SSL* properly most of the
time. Now that it does, this opens the door to running malloc tests under
a leak checker (because it's just not slow enough right now).
Change-Id: I37d2004de27180c41b42a6d9e5aea02caf9b8b32
Reviewed-on: https://boringssl-review.googlesource.com/3340
Reviewed-by: Adam Langley <agl@google.com>
The new V2ClientHello sniff asserts, for safety, that nothing else has
initialized the record layer before it runs. However, OpenSSL allows you to
avoid explicitly calling SSL_connect/SSL_accept and instead let
SSL_read/SSL_write implicitly handshake for you. This check happens at a fairly
low-level in the ssl3_read_bytes function, at which point the record layer has
already been initialized.
Add some tests to ensure this mode works.
(Later we'll lift the handshake check to a higher-level which is probably
simpler.)
Change-Id: Ibeb7fb78e5eb75af5411ba15799248d94f12820b
Reviewed-on: https://boringssl-review.googlesource.com/3334
Reviewed-by: Adam Langley <agl@google.com>
This extends the packet adaptor protocol to send three commands:
type command =
| Packet of []byte
| Timeout of time.Duration
| TimeoutAck
When the shim processes a Timeout in BIO_read, it sends TimeoutAck, fails the
BIO_read, returns out of the SSL stack, advances the clock, calls
DTLSv1_handle_timeout, and continues.
If the Go side sends Timeout right between sending handshake flight N and
reading flight N+1, the shim won't read the Timeout until it has sent flight
N+1 (it only processes packet commands in BIO_read), so the TimeoutAck comes
after N+1. Go then drops all packets before the TimeoutAck, thus dropping one
transmit of flight N+1 without having to actually process the packets to
determine the end of the flight. The shim then sees the updated clock, calls
DTLSv1_handle_timeout, and re-sends flight N+1 for Go to process for real.
When dropping packets, Go checks the epoch and increments sequence numbers so
that we can continue to be strict here. This requires tracking the initial
sequence number of the next epoch.
The final Finished message takes an additional special-case to test. DTLS
triggers retransmits on either a timeout or seeing a stale flight. OpenSSL only
implements the former which should be sufficient (and is necessary) EXCEPT for
the final Finished message. If the peer's final Finished message is lost, it
won't be waiting for a message from us, so it won't time out anything. That
retransmit must be triggered on stale message, so we retransmit the Finished
message in Go.
Change-Id: I3ffbdb1de525beb2ee831b304670a3387877634c
Reviewed-on: https://boringssl-review.googlesource.com/3212
Reviewed-by: Adam Langley <agl@google.com>
This is so the tests needn't be sensitive to the clock. It is, unfortunately, a
test-only hook, but the DTLS retransmit/timeout logic more-or-less requires it
currently. Use this hook to, for now, freeze the clock at zero. This makes the
tests deterministic.
It might be worth designing a saner API in the future. The current one,
notably, requires that the caller's clock be compatible with the one we
internally use. It's also not clear whether the caller needs to call
DTLSv1_handle_timeout or can just rely on the state machine doing it internally
(as it does do). But mock clocks are relatively tame and WebRTC wants to
compile against upstream OpenSSL for now, so we're limited in how much new API
we can build.
Change-Id: I7aad51570596f69275ed0fc1a8892393e4b7ba13
Reviewed-on: https://boringssl-review.googlesource.com/3210
Reviewed-by: Adam Langley <agl@google.com>
Including string.h in base.h causes any file that includes a BoringSSL
header to include string.h. Generally this wouldn't be a problem,
although string.h might slow down the compile if it wasn't otherwise
needed. However, it also causes problems for ipsec-tools in Android
because OpenSSL didn't have this behaviour.
This change removes string.h from base.h and, instead, adds it to each
.c file that requires it.
Change-Id: I5968e50b0e230fd3adf9b72dd2836e6f52d6fb37
Reviewed-on: https://boringssl-review.googlesource.com/3200
Reviewed-by: David Benjamin <davidben@chromium.org>
Reviewed-by: Adam Langley <agl@google.com>
This regressed in fcf25833bc. 0 return code on
unclean shutdown means the underlying BIO returned EOF, didn't push any error
code, but we haven't seen close_notify yet. The intent seems to be that you go
check errno or some BIO-specific equivalent if you care about close_notify.
Make sure test code routes all SSL_read return codes through SSL_get_error
since that's supposed to work in all cases.
(Note that rv == 0 can still give SSL_ERROR_SSL if the error queue is not
empty.)
Change-Id: I45bf9614573f876d93419ce169a4e0d9ceea9052
Reviewed-on: https://boringssl-review.googlesource.com/2981
Reviewed-by: Adam Langley <agl@google.com>
The minimum MTU (not consistently enforced) is just under 256, so it's
difficult to test everything, but this is a basic test. (E.g., without renego,
the only handshake message with encryption is Finished which fits in the MTU.)
It tests the server side because the Certificate message is large enough to
require fragmentation.
Change-Id: Ida11f1057cebae2b800ad13696f98bb3a7fbbc5e
Reviewed-on: https://boringssl-review.googlesource.com/2824
Reviewed-by: Adam Langley <agl@google.com>
This makes SSLv23_method go through DTLS_ANY_VERSION's version negotiation
logic. This allows us to get rid of duplicate ClientHello logic. For
compatibility, SSL_METHOD is now split into SSL_PROTOCOL_METHOD and a version.
The legacy version-locked methods set min_version and max_version based this
version field to emulate the original semantics.
As a bonus, we can now handle fragmented ClientHello versions now.
Because SSLv23_method is a silly name, deprecate that too and introduce
TLS_method.
Change-Id: I8b3df2b427ae34c44ecf972f466ad64dc3dbb171
Amend the version negotiation tests to test this new spelling of max_version.
min_version will be tested in a follow-up.
Change-Id: Ic4bfcd43bc4e5f951140966f64bb5fd3e2472b01
Reviewed-on: https://boringssl-review.googlesource.com/2583
Reviewed-by: Adam Langley <agl@google.com>
The ClientHello record is padded to 1024 bytes when
fastradio_padding is enabled. As a result, the 3G cellular radio
is fast forwarded to DCH (high data rate) state. This mechanism
leads to a substantial redunction in terms of TLS handshake
latency, and benefits mobile apps that are running on top of TLS.
Change-Id: I3d55197b6d601761c94c0f22871774b5a3dad614
MSVC doesn't like it when you compare the two.
Change-Id: I03c5ff2e2668ac2e536de8278e3a7c98a3dfd117
Reviewed-on: https://boringssl-review.googlesource.com/2460
Reviewed-by: Adam Langley <agl@google.com>
Supporting both schemes seems pointless. Now that s->server and s->state are
set appropriately late and get_ssl_method is gone, the only difference is that
the client/server ones have non-functional ssl_accept or ssl_connect hooks. We
can't lose the generic ones, so let's unify on that.
Note: this means a static linker will no longer drop the client or server
handshake code if unused by a consumer linking statically. However, Chromium
needs the server half anyway for DTLS and WebRTC, so that's probably a lost
cause. Android also exposes server APIs.
Change-Id: I290f5fb4ed558f59fadb5d1f84e9d9c405004c23
Reviewed-on: https://boringssl-review.googlesource.com/2440
Reviewed-by: Adam Langley <agl@google.com>
SSL_clear sets s->state and dtls1_clear sets cookie_len on the server. Setting
cookie_len on the server seems to serve no purpose but to let the callback know
how large the buffer is. This can be done just before calling the callback.
It also avoids a bug where the cookie check can be bypassed, should the server
not specify an app_verify_cookie_cb, by supplying a cookie of all zeros of the
maximum size. (Zero is fine because an empty cookie is rejected.)
The goal here is to avoid needing the SSL_clear calls in the handshake
functions. They are currently needed to fix the cookie_len setting when using
the generic method. (They get set wrong and then flipped back.)
Change-Id: I5095891bc0f7df62d83a9c84312fcf0b84826faa
Reviewed-on: https://boringssl-review.googlesource.com/2435
Reviewed-by: Adam Langley <agl@google.com>
This fixes bugs that kept the tests from working:
- Resolve DTLS version and cookie before the session.
- In DTLS_ANY_VERSION, ServerHello should be read with first_packet = 1. This
is a regression from f2fedefdca. We'll want to
do the same for TLS, but first let's change this to a boolean has_version in a
follow-up.
Things not yet fixed:
- DTLS code is not EVP_AEAD-aware. Those ciphers are disabled for now.
- On the client, DTLS_ANY_VERSION creates SSL_SESSIONs with the wrong
ssl_version. The tests pass because we no longer enforce the match as of
e37216f56009fbf48c3a1e733b7a546ca6dfc2af. (In fact, we've gone from the server
ignoring ssl_version and client enforcing to the client mostly ignoring
ssl_version and the server enforcing.)
- ssl3_send_client_hello's ssl_version check checks for equality against
s->version rather than >.
Change-Id: I5a0dde221b2009413df9b9443882b9bf3b29519c
Reviewed-on: https://boringssl-review.googlesource.com/2403
Reviewed-by: Adam Langley <agl@google.com>
We forgot to add those when we implemented the features. (Also relevant because
they will provide test coverage later for configuring features when using the
generic method tables rather than *_client_method.)
Change-Id: Ie08b27de893095e01a05a7084775676616459807
Reviewed-on: https://boringssl-review.googlesource.com/2410
Reviewed-by: Adam Langley <agl@google.com>
The ex_data index may fail to be allocated. Also don't leave a dangling pointer
in handshake_dgst if EVP_DigestInit_ex fails and check a few more init function
failures.
Change-Id: I2e99a89b2171c9d73ccc925a2f35651af34ac5fb
Reviewed-on: https://boringssl-review.googlesource.com/2342
Reviewed-by: Adam Langley <agl@google.com>
This commit fixes a number of crashes caused by malloc failures. They
were found using the -malloc-test=0 option to runner.go which runs tests
many times, causing a different allocation call to fail in each case.
(This test only works on Linux and only looks for crashes caused by
allocation failures, not memory leaks or other errors.)
This is not the complete set of crashes! More can be found by collecting
core dumps from running with -malloc-test=0.
Change-Id: Ia61d19f51e373bccb7bc604642c51e043a74bd83
Reviewed-on: https://boringssl-review.googlesource.com/2320
Reviewed-by: Adam Langley <agl@google.com>
