SIZE_MAX is a great macro, and does unfortunately not exist everywhere.
Since we check against half of it, using bitwise shift to calculate the
value of half SIZE_MAX should be safe enough.
Reviewed-by: Tim Hudson <tjh@openssl.org>
If DSA parameters are absent return -1 (for unknown) in DSA_security_bits.
If parameters are absent when a certificate is set in an SSL/SSL_CTX
structure this will reject the certificate by default. This will cause DSA
certificates which omit parameters to be rejected but that is never (?)
done in practice.
Thanks to Brian 'geeknik' Carpenter for reporting this issue.
Reviewed-by: Emilia Käsper <emilia@openssl.org>
Previous versions of OpenSSL had the max size limit for a CertificateRequest
message as |s->max_cert_list|. Previously master had it to be
SSL3_RT_MAX_PLAIN_LENGTH. However these messages can get quite long if a
server is configured with a long list of acceptable CA names. Therefore
the size limit has been increased to be consistent with previous versions.
RT#4198
Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
Move all calls of the OCSP callback into one place, rather than repeating it
in two different places.
Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
It makes no sense to call the OCSP status callback if we are resuming a
session because no certificates will be sent.
Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
If a server sends the status_request extension then it may choose
to send the CertificateStatus message. However this is optional.
We were treating it as mandatory and the connection was failing.
Thanks to BoringSSL for reporting this issue.
RT#4120
Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
When EC is disabled, and an error occurs in ssl_generate_master_secret()
or RAND_bytes(), the error path does not free rsa_decrypt.
RT#4197
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
After the recent change to use ossl_inline, builds were failing on some
platforms due to a missing usage of "inline".
Reviewed-by: Richard Levitte <levitte@openssl.org>
Add macro ossl_inline for use in public headers where a portable inline
is required. Change existing inline to use ossl_inline
Reviewed-by: Kurt Roeckx <kurt@openssl.org>
This adds support for SSL/TLS configuration using configuration modules.
Sets of command value pairs are store and can be replayed through an
SSL_CTX or SSL structure using SSL_CTX_config or SSL_config.
Reviewed-by: Richard Levitte <levitte@openssl.org>
SSL_CIPHER_description() was returning "unknown" for the encryption
in the new ChaCha20/Poly1305 TLS ciphersuites.
RT#4183
Reviewed-by: Richard Levitte <levitte@openssl.org>
Rename BUF_{strdup,strlcat,strlcpy,memdup,strndup,strnlen}
to OPENSSL_{strdup,strlcat,strlcpy,memdup,strndup,strnlen}
Add #define's for the old names.
Add CRYPTO_{memdup,strndup}, called by OPENSSL_{memdup,strndup} macros.
Reviewed-by: Tim Hudson <tjh@openssl.org>
GCM and CCM are modes of operation for block ciphers only. ChaCha20-Poly1305
operates in neither of them but it is AEAD. This change also enables future
AEAD ciphers to be available for use with DTLS.
Signed-off-by: Rich Salz <rsalz@akamai.com>
Reviewed-by: Matt Caswell <matt@openssl.org>
This reverts commit 777f482d99.
Author credit missing. Reverting this and re-committing with
an Author line.
Reviewed-by: Matt Caswell <matt@openssl.org>
GCM and CCM are modes of operation for block ciphers only. ChaCha20-Poly1305
operates in neither of them but it is AEAD. This change also enables future
AEAD ciphers to be available for use with DTLS.
Signed-off-by: Rich Salz <rsalz@akamai.com>
Reviewed-by: Matt Caswell <matt@openssl.org>
A BIO_flush call in the DTLS code was not correctly setting the |rwstate|
variable to SSL_WRITING. This means that SSL_get_error() will not return
SSL_ERROR_WANT_WRITE in the event of an IO retry.
Reviewed-by: Richard Levitte <levitte@openssl.org>
If using DTLS and NBIO then if a second or subsequent handshake message
fragment hits a retry, then the retry attempt uses the wrong fragment
offset value. This commit restores the fragment offset from the last
attempt.
Reviewed-by: Richard Levitte <levitte@openssl.org>
If the call to OBJ_find_sigid_by_algs fails to find the relevant NID then
we should set the NID to NID_undef.
Reviewed-by: Richard Levitte <levitte@openssl.org>
Add new flag TLS1_FLAGS_RECEIVED_EXTMS which is set when the peer sends
the extended master secret extension.
Server now sends extms if and only if the client sent extms.
Check consistency of extms extension when resuming sessions following (where
practical) RFC7627.
Reviewed-by: Matt Caswell <matt@openssl.org>
This change required some special treatment, as HMAC is intertwined
with EVP_MD. For now, all local HMAC_CTX variables MUST be
initialised with HMAC_CTX_EMPTY, or whatever happens to be on the
stack will be mistaken for actual pointers to EVP_MD_CTX. This will
change as soon as HMAC_CTX becomes opaque.
Also, since HMAC_CTX_init() can fail now, its return type changes from
void to int, and it will return 0 on failure, 1 on success.
Reviewed-by: Rich Salz <rsalz@openssl.org>
SSL_{CTX}_set_tmp_ecdh() allows to set 1 EC curve and then tries to use it. On
the other hand SSL_{CTX_}set1_curves() allows you to set a list of curves, but
only when SSL_{CTX_}set_ecdh_auto() was called to turn it on.
Reviewed-by: Dr. Stephen Henson <steve@openssl.org>
This only gets used to set a specific curve without actually checking that the
peer supports it or not and can therefor result in handshake failures that can
be avoided by selecting a different cipher.
Reviewed-by: Dr. Stephen Henson <steve@openssl.org>
The new state machine code missed an allowed transition when resuming a
session via EAP FAST. This commits adds the missing check for the
transition.
Reviewed-by: Andy Polyakov <appro@openssl.org>
Remove sign/verify and required_pkey_type fields of EVP_MD: these are a
legacy from when digests were linked to public key types. All signing is
now handled by the corresponding EVP_PKEY_METHOD.
Only allow supported digest types in RSA EVP_PKEY_METHOD: other algorithms
already block unsupported types.
Remove now obsolete EVP_dss1() and EVP_ecdsa().
Reviewed-by: Richard Levitte <levitte@openssl.org>
Add CRYPTO_free_ex_index (for shared libraries)
Unify and complete the documentation for all "ex_data" API's and objects.
Replace xxx_get_ex_new_index functions with a macro.
Added an exdata test.
Renamed the ex_data internal datatypes.
Reviewed-by: Matt Caswell <matt@openssl.org>
Don't hard code EVP_sha* etc for signature algorithms: use table
indices instead. Add SHA224 and SHA512 to tables.
Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
Change handshake hash array into a single digest context simplifying the
handhake hash code. Use EVP_md5_sha1() if needed for handshake hashes in
TLS 1.1 and earlier.
Simplify PRF code to also use a single digest and treat EVP_md5_sha1()
as a special case.
Modify algorithm2 field of ciphers to use a single index value for handshake
hash and PRF instead of a bitmap.
Reviewed-by: Matt Caswell <matt@openssl.org>
If somewhere in SSL_new() there is a memory allocation failure, ssl3_free() can
get called with s->s3 still being NULL.
Patch also provided by Willy Tarreau <wtarreau@haproxy.com>
Signed-off-by: Kurt Roeckx <kurt@roeckx.be>
Reviewed-by: Viktor Dukhovni <openssl-users@dukhovni.org>
This patch contains the necessary changes to provide GOST 2012
ciphersuites in TLS. It requires the use of an external GOST 2012 engine.
Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
Though the callers check the function return value and ignore the
size_t output argument on failure, it is still often not ideal to
store (-1) in size_t on error. That might signal an unduly large
buffer. Instead set the size_t to 0, to indicate no space.
Reviewed-by: Richard Levitte <levitte@openssl.org>
Initial API implemented for notifying applications that an ASYNC_JOB
has completed. Currently only s_server is using this. The Dummy Async
engine "cheats" in that it notifies that it has completed *before* it
pauses the job. A normal async engine would not do that.
Only the posix version of this has been implemented so far, so it will
probably fail to compile on Windows at the moment.
Reviewed-by: Rich Salz <rsalz@openssl.org>
Removed the function ASYNC_job_is_waiting() as it was redundant. The only
time user code has a handle on a job is when one is waiting, so all they
need to do is check whether the job is NULL. Also did some cleanups to
make sure the job really is NULL after it has been freed!
Reviewed-by: Rich Salz <rsalz@openssl.org>
The following entry points have been made async aware:
SSL_accept
SSL_read
SSL_write
Also added is a new mode - SSL_MODE_ASYNC. Calling the above functions with
the async mode enabled will initiate a new async job. If an async pause is
encountered whilst executing the job (such as for example if using SHA1/RSA
with the Dummy Async engine), then the above functions return with
SSL_WANT_ASYNC. Calling the functions again (with exactly the same args
as per non-blocking IO), will resume the job where it left off.
Reviewed-by: Rich Salz <rsalz@openssl.org>
There are lots of calls to EVP functions from within libssl There were
various places where we should probably check the return value but don't.
This adds these checks.
Reviewed-by: Richard Levitte <levitte@openssl.org>
A call to X509_verify_cert() is used to build a chain of certs for the
server to send back to the client. It isn't *actually* used for verifying
the cert at all - just building the chain. Therefore the return value is
ignored.
Reviewed-by: Kurt Roeckx <kurt@openssl.org>
The |passwd| variable in the code can be NULL if it goes to the err label.
Therefore we cannot call strlen on it without first checking that it is non
NULL.
Reviewed-by: Kurt Roeckx <kurt@openssl.org>
This adds a TLSv1.0 cipher alias for ciphersuites requiring
at least TLSv1.0: currently only PSK ciphersuites using SHA256
or SHA384 MAC (SSLv3 only supports SHA1 and MD5 MAC).
Reviewed-by: Matt Caswell <matt@openssl.org>
This disables some ciphersuites which aren't supported in SSL v3:
specifically PSK ciphersuites which use SHA256 or SHA384 for the MAC.
Thanks to the Open Crypto Audit Project for identifying this issue.
Reviewed-by: Matt Caswell <matt@openssl.org>
The new function SSL_use_certificate_chain_file was always crashing in
the internal function use_certificate_chain_file because it would pass a
NULL value for SSL_CTX *, but use_certificate_chain_file would
unconditionally try to dereference it.
Reviewed-by: Stephen Henson <steve@openssl.org>
The function tls1_get_curvelist() has an explicit check to see if s->cert
is NULL or not. However the check appears *after* calling the tls1_suiteb
macro which derefs s->cert. In reality s->cert can never be NULL because
it is created in SSL_new(). If the malloc fails then the SSL_new call fails
and no SSL object is created.
Reviewed-by: Tim Hudson <tjh@openssl.org>
if we have a malloc |x = OPENSSL_malloc(...)| sometimes we check |x|
for NULL and sometimes we treat it as a boolean |if(!x) ...|. Standardise
the approach in libssl.
Reviewed-by: Kurt Roeckx <kurt@openssl.org>
The SSL object was being deref'd and then there was a later redundant check
to see if it is NULL. We assume all SSL_foo functions pass a non NULL SSL
object and do not check it.
Reviewed-by: Tim Hudson <tjh@openssl.org>
We were setting |s->renegotiate| and |s->new_session| to 0 twice in
tls_finish_handshake. This is redundant so now we just do it once!
Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
We finish the handshake when we move into the TLS_ST_OK state. At various
points we were also unnecessarily finishing it when we were reading/writing
the Finished message. It's much simpler just to do it in TLS_ST_OK, so
remove the other calls.
Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
Rebuild error source files: the new mkerr.pl functionality will now
pick up and translate static function names properly.
Reviewed-by: Richard Levitte <levitte@openssl.org>
A buggy application that call SSL_write with a different length after a
NBIO event could cause an OPENSSL_assert to be reached. The assert is not
actually necessary because there was an explicit check a little further
down that would catch this scenario. Therefore remove the assert an move
the check a little higher up.
Reviewed-by: Rich Salz <rsalz@openssl.org>
This OPENSSL_assert in (d)tls1_hearbeat is trivially always going to be
true because it is testing the sum of values that have been set as
constants just a few lines above and nothing has changed them. Therefore
remove this.
Reviewed-by: Rich Salz <rsalz@openssl.org>
There were a few remaining references to SSLv2 support which are no longer
relevant now that it has been removed.
Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
There was a discrepancy between what ciphersuites we allowed to send a
CertificateRequest, and what ciphersuites we allowed to receive one. So
add PSK and SRP to the disallowed ones.
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
Some functions were marked as inline in statem_srvr.c where they probably
didn't need to be, so remove it.
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
|tls_process_finished| was checking that |peer_finish_md_len| was
non-negative. However neither |tls1_final_finish_mac| or
|ssl3_final_finish_mac| can ever return a negative value, so the check is
superfluous.
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
Due the rest of the state machine changes it makes sense to change the
SSL_state_string return strings from 3* to T*. They are not SSL3 specific
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
There was a few uses of snprintf in the DTLS SCTP code which made more
sense to be a memcpy.
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
Add the ossl_statem prefix to various funtions to avoid name clashes.
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
Various enums were introduced as part of the state machine rewrite. As a
matter of style it is preferred for these to be typedefs.
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
The function dtls1_link_min_mtu() was only used within d1_lib.c so make
it static.
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
Clang with --strict-warnings was complaining about an uninitalised
variable. In reality it will never be used uninitialised but clang can't
figure out the logic, so just init it anyway to silence the warning.
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
Rebasing the state machine code introduced a problem with empty
NewSessionTicket processing. The return value from the
tls_process_new_session_ticket() is supposed to be an enum, but a bare
integer was being used. Unfortunately this is valid C so the compiler
doesn't pick it up.
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
Fix another instance of |al| being unitialised in certain error scenarios.
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
A number of error codes were wrong due to a rebase of the state machine
code.
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
The SSL variable |in_handshake| seems misplaced. It would be better to have
it in the STATEM structure.
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
tls_process_client_hello() failed to initialise the |al| variable in some
(error) scenarios. This could cause issues with creating the alert.
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
Adding the new state machine broke the DTLSv1_listen code because
calling SSL_in_before() was erroneously returning true after DTLSv1_listen
had successfully completed. This change ensures that SSL_in_before returns
false.
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
Remove repeated blocks of checking SSL and then SSL_CTX for the
info_callback.
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
SSL_state has been replaced by SSL_get_state and SSL_set_state is no longer
supported.
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
The |no_cert_verify| should be in the state machine structure not in SSL
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
Change various state machine functions to use the prefix ossl_statem
instead.
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
Rename the enum HANDSHAKE_STATE to OSSL_HANDSHAKE_STATE to ensure there are
no namespace clashes, and convert it into a typedef.
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
Fixed some issues in the logic for determining whether an SKE should be
expected or not. In particular only allow an SKE for RSA if its export and
the key size is not allowed. Also fix the ephemeral ciphersuite checks and
add in a missing call to ssl3_check_cert_and_algorithm().
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
Fix an out of date reference to old state machine code in a comment
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
The next_state variable is no longer needed in the new state machine.
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
Add some documentation on the thinking behind the state machine.
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
Move some function definitions around within the state machine to make sure
they are in the correct files. Also create a statem_locl.h header for stuff
entirely local to the state machine code and move various definitions into
it.
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
Pull out the state machine into a separate sub directory. Also moved some
functions which were nothing to do with the state machine but were in state
machine files. Pulled all the SSL_METHOD definitions into one place...most
of those files had very little left in them any more.
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
ssl_get_message is no longer used so it should be removed from
ssl_method_st
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
