The EVP_CIPHER codepath should no longer be used with TLS. It still exists for
DTLS and SSLv3. The AEAD construction in TLS does not allow for
variable-overhead AEADs, so stateful AEADs do not include the length in the ad
parameter. Rather the AEADs internally append the unpadded length once it is
known. EVP_aead_rc4_md5_tls is modified to account for this.
Tests are added (and RC4-MD5's regenerated) for each of the new AEADs. The
cipher tests are all moved into crypto/cipher/test because there's now a lot of
them and they clutter the directory listing.
In ssl/, the stateful AEAD logic is also modified to account for stateful AEADs
with a fixed IV component, and for AEADs which use a random nonce (for the
explicit-IV CBC mode ciphers).
The new implementation fixes a bug/quirk in stateless CBC mode ciphers where
the fixed IV portion of the keyblock was generated regardless. This is at the
end, so it's only relevant for EAP-TLS which generates a MSK from the end of
the key block.
Change-Id: I2d8b8aa11deb43bde2fd733f4f90b5d5b8cb1334
Reviewed-on: https://boringssl-review.googlesource.com/2692
Reviewed-by: Adam Langley <agl@google.com>
This should have been removed with its dtls1_clear cousin in
8c88153465.
Change-Id: Ibf4ee67348f603285b26766568cbb92183b62cee
Reviewed-on: https://boringssl-review.googlesource.com/2823
Reviewed-by: Adam Langley <agl@google.com>
State on s3 gets freed in both ssl3_clear and ssl3_free. Considate to just
ssl3_free. This replaces the (SSL,ssl,ssl3)_clear calls in (SSL,ssl,ssl3)_new
with the state that was initialized. This results in a little code duplication
between SSL_new and SSL_clear because state is on the wrong object. I've just
left TODOs for now; some of it will need disentangling.
We're far from it, but going forward, separate state between s and s->s3 as:
- s contains configuration state, DTLS or TLS. It is initialized from SSL_CTX,
configurable directly afterwards, and preserved across SSL_clear calls.
(Including when it's implicitly set as part of a handshake callback.)
- Connection state hangs off s->s3 (TLS) and s->d1 (DTLS). It is reset across
SSL_clear. This should happen naturally out of a ssl_free/ssl_new pair.
The goal is to avoid needing separate initialize and reset code for anything;
the point any particular state is reset is the point its owning context is
destroyed and recreated.
Change-Id: I5d779010778109f8c339c07433a0777feaf94d1f
Reviewed-on: https://boringssl-review.googlesource.com/2822
Reviewed-by: Adam Langley <agl@google.com>
This avoids needing a should_add_to_finished_hash boolean on do_write. The
logic in do_write was a little awkward because do_write would be called
multiple times if the write took several iterations. This also gets complex if
DTLS retransmits are involved. (At a glance, it's not obvious the
BIO_CTRL_DGRAM_MTU_EXCEEDED case actually works.)
Doing it as the handshake message is being prepared avoids this concern. It
also gives a natural point for the extended master secret logic which needs to
do work after the finished hash has been sampled.
As a bonus, we can remove s->d1->retransmitting which was only used to deal
with this issue.
Change-Id: Ifedf23ee4a6c5e08f960d296a6eb1f337a16dc7a
Reviewed-on: https://boringssl-review.googlesource.com/2604
Reviewed-by: Adam Langley <agl@google.com>
The frag_off/frag_len parameters are always zero, and the return value is never
used.
Change-Id: If7487b23c55f2a996e411b25b76a8e1651f25d8b
Reviewed-on: https://boringssl-review.googlesource.com/2601
Reviewed-by: Adam Langley <agl@google.com>
This change has no semantic effect (I hope!). It's just a reformatting
of a few files in ssl/. This is just a start – the other files in ssl/
should follow in the coming days.
Change-Id: I5eb3f4b18d0d46349d0f94d3fe5ab2003db5364e
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
There's an undefined one not used anywhere. The others ought to be const. Also
move the forward declaration to ssl.h so we don't have to use the struct name.
Change-Id: I76684cf65255535c677ec19154cac74317c289ba
Reviewed-on: https://boringssl-review.googlesource.com/2561
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>
This was added in http://rt.openssl.org/Ticket/Display.html?id=2033 to support
a mode where a DTLS socket would statelessly perform the ClientHello /
HelloVerifyRequest portion of the handshake, to be handed off to a socket
specific to this peer address.
This is not used by WebRTC or other current consumers. If we need to support
something like this, it would be cleaner to do the listen portion (cookieless
ClientHello + HelloVerifyRequest) externally and then spin up an SSL instance
on receipt of a cookied ClientHello. This would require a slightly more complex
BIO to replay the second ClientHello but would avoid peppering the DTLS
handshake state with a special short-circuiting mode.
Change-Id: I7a413932edfb62f8b9368912a9a0621d4155f1aa
Reviewed-on: https://boringssl-review.googlesource.com/2220
Reviewed-by: Adam Langley <agl@google.com>
I see no internal users and the existence of a THIRD version encoding
complicates all version-checking logic. Also convert another version check to
SSL_IS_DTLS that was missed earlier.
Change-Id: I60d215f57d44880f6e6877889307dc39dbf838f7
Reviewed-on: https://boringssl-review.googlesource.com/1550
Reviewed-by: Adam Langley <agl@google.com>
Of the remaining implementations left, ssl3_, dtls1_, and ssl23_, dtls1_ is
redundant and can be folded into ssl3_. ssl23_ actually isn't; it sets 5
minutes rather than 2 hours. Two hours seems to be what everything else uses
and seems a saner default. Most consumers seem to override it anyway
(SSL_CTX_set_timeout). But it is a behavior change.
The method is called at two points:
- SSL_get_default_timeout
- SSL_CTX_new
Incidentally, the latter call actually makes the former never called internally
and the value it returns a lie. SSL_get_default_timeout returns the default
timeout of the /current/ method, but in ssl_get_new_session, the timeout is
shadowed by session_timeout on the context. That is initialized when
SSL_CTX_new is called. So, unless you go out of your way to
SSL_CTX_set_timeout(0), it always overrides. (And it actually used to a
difference because, for SSL23, the SSL_CTX's method is SSL23, but, when session
creation happens, the SSL's method is the version-specific one.)
Change-Id: I331d3fd69b726242b36492402717b6d0b521c6ee
Reviewed-on: https://boringssl-review.googlesource.com/1521
Reviewed-by: Adam Langley <agl@google.com>
Windows doesn't have ssize_t, sadly. There's SSIZE_T, but defining an
OPENSSL_SSIZE_T seems worse than just using an int.
Change-Id: I09bb5aa03f96da78b619e551f92ed52ce24d9f3f
Reviewed-on: https://boringssl-review.googlesource.com/1352
Reviewed-by: Adam Langley <agl@google.com>
Initial fork from f2d678e6e89b6508147086610e985d4e8416e867 (1.0.2 beta).
(This change contains substantial changes from the original and
effectively starts a new history.)
