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This commit handles BIO_ACCEPT_free BIO_CB_FREE BIO_CONNECT_free
BIO_free BIO_free_all BIO_vfree
Reviewed-by: Matt Caswell <matt@openssl.org>
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Support loading of key and certificate from the same file if
SSL_CONF_FLAG_REQUIRE_PRIVATE is set. This is done by remembering the
filename used for each certificate type and attempting to load a private
key from the file when SSL_CONF_CTX_finish is called.
Update docs.
Reviewed-by: Richard Levitte <levitte@openssl.org>
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This commit sets the value of SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG to
zero.
Reviewed-by: Richard Levitte <levitte@openssl.org>
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Ensure RAND_bytes return value is checked correctly, and that we no longer
use RAND_pseudo_bytes.
Reviewed-by: Richard Levitte <levitte@openssl.org>
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In ssl3_send_new_session_ticket the message to be sent is constructed. We
skip adding the length of the session ticket initially, then call
ssl_set_handshake_header, and finally go back and add in the length of the
ticket. Unfortunately, in DTLS, ssl_set_handshake_header also has the side
effect of buffering the message for subsequent retransmission if required.
By adding the ticket length after the call to ssl_set_handshake_header the
message that is buffered is incomplete, causing an invalid message to be
sent on retransmission.
Reviewed-by: Richard Levitte <levitte@openssl.org>
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In DTLS, immediately prior to epoch change, the write_sequence is supposed
to be stored in s->d1->last_write_sequence. The write_sequence is then reset
back to 00000000. In the event of retransmits of records from the previous
epoch, the last_write_sequence is restored. This commit fixes a bug in
DTLS1.2 where the write_sequence was being reset before last_write_sequence
was saved, and therefore retransmits are sent with incorrect sequence
numbers.
Reviewed-by: Richard Levitte <levitte@openssl.org>
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Start ensuring all OpenSSL "free" routines allow NULL, and remove
any if check before calling them.
This gets DH_free, DSA_free, RSA_free
Reviewed-by: Matt Caswell <matt@openssl.org>
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Reviewed-by: Matt Caswell <matt@openssl.org>
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It was saying that it was an illegal parameter / unsupported cipher
Reviewed-by: Matt Caswell <matt@openssl.org>
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The certificate already contains the DH parameters in that case.
ssl3_send_server_key_exchange() would fail in that case anyway.
Reviewed-by: Matt Caswell <matt@openssl.org>
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Also removes for it being NULL
Reviewed-by: Matt Caswell <matt@openssl.org>
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Fix missing return value check in dtls1_listen when calling SSL_clear().
Reviewed-by: Richard Levitte <levitte@openssl.org>
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Change ssl_set_handshake_header from return void to returning int, and
handle error return code appropriately.
Reviewed-by: Richard Levitte <levitte@openssl.org>
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Ensure that all functions have their return values checked where
appropriate. This covers all functions defined and called from within
libssl.
Reviewed-by: Richard Levitte <levitte@openssl.org>
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Mark most functions returning a result defined in any libssl header file
with __owur to warn if they are used without checking the return value.
Use -DUNUSED_RETURN compiler flag with gcc to activate these warnings.
Some functions returning a result are skipped if it is common and valid to
use these functions without checking the return value.
Reviewed-by: Richard Levitte <levitte@openssl.org>
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Don't check that the curve appears in the list of acceptable curves for the
peer, if they didn't send us such a list (RFC 4492 does not require that the
extension be sent).
Reviewed-by: Emilia Käsper <emilia@openssl.org>
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Reviewed-by: Emilia Käsper <emilia@openssl.org>
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Reviewed-by: Emilia Käsper <emilia@openssl.org>
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If client auth is used then a server can seg fault in the event of a DHE
cipher being used and a zero length ClientKeyExchange message being sent
by the client. This could be exploited in a DoS attack.
CVE-2015-1787
Reviewed-by: Richard Levitte <levitte@openssl.org>
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If a client renegotiates using an invalid signature algorithms extension
it will crash a server with a NULL pointer dereference.
Thanks to David Ramos of Stanford University for reporting this bug.
CVE-2015-0291
Reviewed-by: Tim Hudson <tjh@openssl.org>
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The DTLSv1_listen function is intended to be stateless and processes
the initial ClientHello from many peers. It is common for user code to
loop over the call to DTLSv1_listen until a valid ClientHello is received
with an associated cookie. A defect in the implementation of DTLSv1_listen
means that state is preserved in the SSL object from one invokation to the
next that can lead to a segmentation fault. Erorrs processing the initial
ClientHello can trigger this scenario. An example of such an error could
be that a DTLS1.0 only client is attempting to connect to a DTLS1.2 only
server.
CVE-2015-0207
Reviewed-by: Richard Levitte <levitte@openssl.org>
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OpenSSL 1.0.2 introduced the "multiblock" performance improvement. This
feature only applies on 64 bit x86 architecture platforms that support AES
NI instructions. A defect in the implementation of "multiblock" can cause
OpenSSL's internal write buffer to become incorrectly set to NULL when
using non-blocking IO. Typically, when the user application is using a
socket BIO for writing, this will only result in a failed connection.
However if some other BIO is used then it is likely that a segmentation
fault will be triggered, thus enabling a potential DoS attack.
CVE-2015-0290
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Andy Polyakov <appro@openssl.org>
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The function tls1_PRF counts the number of digests in use and partitions
security evenly between them. There always needs to be at least one digest
in use, otherwise this is an internal error. Add a sanity check for this.
Reviewed-by: Richard Levitte <levitte@openssl.org>
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Missed one file in the #ifdef merge; thanks Kurt.
Reviewed-by: Kurt Roeckx <kurt@openssl.org>
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It created the cert structure in SSL_CTX or SSL if it was NULL, but they can
never be NULL as the comments already said.
Reviewed-by: Dr. Stephen Henson <steve@openssl.org>
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If SSL_check_chain is called with a NULL X509 object or a NULL EVP_PKEY
or the type of the public key is unrecognised then the local variable
|cpk| in tls1_check_chain does not get initialised. Subsequently an
attempt is made to deref it (after the "end" label), and a seg fault will
result.
Reviewed-by: Dr. Stephen Henson <steve@openssl.org>
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[and respect error return value in ssltest.c]
Reviewed-by: Matt Caswell <matt@openssl.org>
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Suggested by John Foley <foleyj@cisco.com>.
Reviewed-by: Matt Caswell <matt@openssl.org>
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Cleanse various intermediate buffers used by the PRF.
Reviewed-by: Richard Levitte <levitte@openssl.org>
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Ensure all malloc failures return -1.
Reported by Adam Langley (Google).
Reviewed-by: Matt Caswell <matt@openssl.org>
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Fix security issue where under certain conditions a client can complete a
handshake with an unseeded PRNG. The conditions are:
- Client is on a platform where the PRNG has not been seeded, and the
user has not seeded manually
- A protocol specific client method version has been used (i.e. not
SSL_client_methodv23)
- A ciphersuite is used that does not require additional random data
from the PRNG beyond the initial ClientHello client random
(e.g. PSK-RC4-SHA)
If the handshake succeeds then the client random that has been used will
have been generated from a PRNG with insufficient entropy and therefore
the output may be predictable.
For example using the following command with an unseeded openssl will
succeed on an unpatched platform:
openssl s_client -psk 1a2b3c4d -tls1_2 -cipher PSK-RC4-SHA
CVE-2015-0285
Reviewed-by: Richard Levitte <levitte@openssl.org>
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Since commit 741c9959 ("DTLS revision."), we put the wrong protocol
version into our ClientHello for DTLS1_BAD_VER. The old DTLS
code which used ssl->version was replaced by the more generic SSL3 code
which uses ssl->client_version. The Cisco ASA no longer likes our
ClientHello.
RT#3711
Reviewed-by: Rich Salz <rsalz@openssl.org>
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Commit 9cf0f187 in HEAD, and 68039af3 in 1.0.2, removed a version check
from dtls1_buffer_message() which was needed to distinguish between DTLS
1.x and Cisco's pre-standard version of DTLS (DTLS1_BAD_VER).
Based on an original patch by David Woodhouse <dwmw2@infradead.org>
RT#3703
Reviewed-by: Tim Hudson <tjh@openssl.org>
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This patch uses warning/fatal constants instead of numbers with comments for
warning/alerts in d1_pkt.c and s3_pkt.c
RT#3725
Reviewed-by: Rich Salz <rsalz@openssl.org>
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Miscellaneous unchecked malloc fixes. Also fixed some mem leaks on error
paths as I spotted them along the way.
Reviewed-by: Tim Hudson <tjh@openssl.org>
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These ciphers are removed:
TLS1_CK_RSA_EXPORT1024_WITH_RC4_56_MD5
TLS1_CK_RSA_EXPORT1024_WITH_RC2_CBC_56_MD5
TLS1_CK_RSA_EXPORT1024_WITH_DES_CBC_SHA
TLS1_CK_DHE_DSS_EXPORT1024_WITH_DES_CBC_SHA
TLS1_CK_RSA_EXPORT1024_WITH_RC4_56_SHA
TLS1_CK_DHE_DSS_EXPORT1024_WITH_RC4_56_SHA
TLS1_CK_DHE_DSS_WITH_RC4_128_SHA
They were defined in a long-expired IETF internet-draft:
draft-ietf-tls-56-bit-ciphersuites-01.txt
Reviewed-by: Richard Levitte <levitte@openssl.org>
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Some Cisco appliances use a pre-standard version number for DTLS. We support
this as DTLS1_BAD_VER within the code.
This change fixes d2i_SSL_SESSION for that DTLS version.
Based on an original patch by David Woodhouse <dwmw2@infradead.org>
RT#3704
Reviewed-by: Tim Hudson <tjh@openssl.org>
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Added various missing return value checks in tls1_change_cipher_state.
Reviewed-by: Richard Levitte <levitte@openssl.org>
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Fixed various missing return value checks in ssl3_send_newsession_ticket.
Also a mem leak on error.
Reviewed-by: Richard Levitte <levitte@openssl.org>
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NETSCAPE_HANG_BUG is a workaround for a browser bug from many years ago
(2000).
It predates DTLS, so certainly has no place in d1_srvr.c.
In s3_srvr.c it forces the ServerDone to appear in the same record as the
CertificateRequest when doing client auth.
BoringSSL have already made the same commit:
79ae85e4f777f94d91b7be19e8a62016cb55b3c5
Reviewed-by: Tim Hudson <tjh@openssl.org>
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the "-hack" option from s_server that set this option.
Reviewed-by: Tim Hudson <tjh@openssl.org>
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Reviewed-by: Tim Hudson <tjh@openssl.org>
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Reviewed-by: Andy Polyakov <appro@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
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Reviewed-by: Tim Hudson <tjh@openssl.org>
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When writing out the hint, if the hint > 0, then we write it out otherwise
we skip it.
Previously when reading the hint back in, if were expecting to see one
(because the ticket length > 0), but it wasn't present then we set the hint
to -1, otherwise we set it to 0. This fails to set the hint to the same as
when it was written out.
The hint should never be negative because the RFC states the hint is
unsigned. It is valid for a server to set the hint to 0 (this means the
lifetime is unspecified according to the RFC). If the server set it to 0, it
should still be 0 when we read it back in.
Reviewed-by: Tim Hudson <tjh@openssl.org>
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SSL_SESSION_get_ticket_lifetime_hint. The latter has been reported as
required to fix Qt for OpenSSL 1.1.0. I have also added the former in order
to determine whether a ticket is present or not - otherwise it is difficult
to know whether a zero lifetime hint is because the server set it to 0, or
because there is no ticket.
Reviewed-by: Tim Hudson <tjh@openssl.org>
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From RFC4507:
"The ticket_lifetime_hint field contains a hint from the server about how
long the ticket should be stored. The value indicates the lifetime in
seconds as a 32-bit unsigned integer in network byte order."
Reviewed-by: Tim Hudson <tjh@openssl.org>
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There is no mechanism to do that at the moment - SSL_set_bio makes changes
to the wbio even if you pass in SSL_get_wbio().
This commit introduces two new API functions SSL_set_rbio() and
SSL_set_wbio(). These do the same job as SSL_set_bio() except they enable
you to manage the rbio and wbio individually.
Reviewed-by: Tim Hudson <tjh@openssl.org>
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I left many "#if 0" lines, usually because I thought we would
probably want to revisit them later, or because they provided
some useful internal documentation tips.
Reviewed-by: Andy Polyakov <appro@openssl.org>
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The mkstack.pl script now generates the entire safestack.h file.
It generates output that follows the coding style.
Also, removed all instances of the obsolete IMPLEMENT_STACK_OF
macro.
Reviewed-by: Andy Polyakov <appro@openssl.org>
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