This setting belongs to the individual connection, not to a configuration
shared by many connections. (If a default value is desired, that can be handled
by the application code that calls mbedtls_ssl_set_mtu().)
There are at least two ways in which this matters:
- per-connection settings can be adjusted if MTU estimates become available
during the lifetime of the connection
- it is at least conceivable that a server might recognize restricted clients
based on range of IPs and immediately set a lower MTU for them. This is much
easier to do with a per-connection setting than by maintaining multiple
near-duplicated ssl_config objects that differ only by the MTU setting.
This commit adds a new command line option `dgram_packing`
to the example server application programs/ssl/ssl_client2
allowing to allow/forbid the use of datagram packing.
For now, just check that it causes us to fragment. More tests are coming in
follow-up commits to ensure we respect the exact value set, including when
renegotiating.
It's undesirable to have users of the SSL layer check for an error code
specific to a lower-level layer, both out of general layering principles, and
also because if we later make another crypto module gain resume capabilities,
we would need to change the contract again (checking for a new module-specific
error code).
Summary of merge conflicts:
include/mbedtls/ecdh.h -> documentation style
include/mbedtls/ecdsa.h -> documentation style
include/mbedtls/ecp.h -> alt style, new error codes, documentation style
include/mbedtls/error.h -> new error codes
library/error.c -> new error codes (generated anyway)
library/ecp.c:
- code of an extracted function was changed
library/ssl_cli.c:
- code addition on one side near code change on the other side
(ciphersuite validation)
library/x509_crt.c -> various things
- top fo file: helper structure added near old zeroize removed
- documentation of find_parent_in()'s signature: improved on one side,
added arguments on the other side
- documentation of find_parent()'s signature: same as above
- verify_chain(): variables initialised later to give compiler an
opportunity to warn us if not initialised on a code path
- find_parent(): funcion structure completely changed, for some reason git
tried to insert a paragraph of the old structure...
- merge_flags_with_cb(): data structure changed, one line was fixed with a
cast to keep MSVC happy, this cast is already in the new version
- in verify_restratable(): adjacent independent changes (function
signature on one line, variable type on the next)
programs/ssl/ssl_client2.c:
- testing for IN_PROGRESS return code near idle() (event-driven):
don't wait for data in the the socket if ECP_IN_PROGRESS
tests/data_files/Makefile: adjacent independent additions
tests/suites/test_suite_ecdsa.data: adjacent independent additions
tests/suites/test_suite_x509parse.data: adjacent independent additions
* development: (1059 commits)
Change symlink to hardlink to avoid permission issues
Fix out-of-tree testing symlinks on Windows
Updated version number to 2.10.0 for release
Add a disabled CMAC define in the no-entropy configuration
Adapt the ARIA test cases for new ECB function
Fix file permissions for ssl.h
Add ChangeLog entry for PR#1651
Fix MicroBlaze register typo.
Fix typo in doc and copy missing warning
Fix edit mistake in cipher_wrap.c
Update CTR doc for the 64-bit block cipher
Update CTR doc for other 128-bit block ciphers
Slightly tune ARIA CTR documentation
Remove double declaration of mbedtls_ssl_list_ciphersuites
Update CTR documentation
Use zeroize function from new platform_util
Move to new header style for ALT implementations
Add ifdef for selftest in header file
Fix typo in comments
Use more appropriate type for local variable
...
Also, introduce MBEDTLS_EINTR locally in net_sockets.c
for the platform-dependent return code macro used by
the `select` call to indicate that the poll was interrupted
by a signal handler: On Unix, the corresponding macro is EINTR,
while on Windows, it's WSAEINTR.
Previously, the idling loop in ssl_server2 didn't check whether
the underlying call to mbedtls_net_poll signalled that the socket
became invalid. This had the consequence that during idling, the
server couldn't be terminated through a SIGTERM, as the corresponding
handler would only close the sockets and expect the remainder of
the program to shutdown gracefully as a consequence of this.
This was subsequently attempted to be fixed through a change
in ssl-opt.sh by terminating the server through a KILL signal,
which however lead to other problems when the latter was run
under valgrind.
This commit changes the idling loop in ssl_server2 and ssl_client2
to obey the return code of mbedtls_net_poll and gracefully shutdown
if an error occurs, e.g. because the socket was closed.
As a consequence, the server termination via a KILL signal in
ssl-opt.sh is no longer necessary, with the previous `kill; wait`
pattern being sufficient. The commit reverts the corresponding
change.
This commit adds four tests to tests/ssl-opt.sh:
(1) & (2): Check behaviour of optional/required verification when the
trusted CA chain is empty.
(3) & (4): Check behaviour of optional/required verification when the
client receives a server certificate with an unsupported curve.
In the TLS test client, allow SHA-1 as a signature hash algorithm.
Without this, the renegotation tests failed.
A previous commit had allowed SHA-1 via the certificate profile but
that only applied before the initial negotiation which includes the
signature_algorithms extension.
SHA-1 is now disabled by default in the X.509 layer. Explicitly enable
it in our tests for now. Updating all the test data to SHA-256 should
be done over time.
The library/net.c and its corresponding include/mbedtls/net.h file are
renamed to library/net_sockets.c and include/mbedtls/net_sockets.h
respectively. This is to avoid naming collisions in projects which also
have files with the common name 'net'.
* development: (73 commits)
Bump yotta dependencies version
Fix typo in documentation
Corrected misleading fn description in ssl_cache.h
Corrected URL/reference to MPI library
Fix yotta dependencies
Fix minor spelling mistake in programs/pkey/gen_key.c
Bump version to 2.1.2
Fix CVE number in ChangeLog
Add 'inline' workaround where needed
Fix references to non-standard SIZE_T_MAX
Fix yotta version dependencies again
Upgrade yotta dependency versions
Fix compile error in net.c with musl libc
Add missing warning in doc
Remove inline workaround when not useful
Fix macroization of inline in C++
Changed attribution for Guido Vranken
Merge of IOTSSL-476 - Random malloc in pem_read()
Fix for IOTSSL-473 Double free error
Fix potential overflow in CertificateRequest
...
Conflicts:
include/mbedtls/ssl_internal.h
library/ssl_cli.c
- interrupt the connection abruptly (no close_notify)
- reconnect from the same port while server sill has an active connection from
this port.
Some real-world clients do that, see section 4.2.8 of RFC 6347.
This is not very useful for TLS as mbedtls_ssl_write() will automatically
fragment and return the length used, and the application should check for that
anyway, but this is useful for DTLS where mbedtls_ssl_write() returns an
error, and the application needs to be able to query the maximum length
instead of just guessing.
- Only the server needs to generate/parse tickets
- Only the client needs to store them
Also adjust prototype of ssl_conf_session_tickets() while at it.
Initially thought it would be per-connection, but since max_version is in conf
too, and you need to lower that for a fallback connection, the fallback flag
should be in the same place
* mbedtls-1.3:
Rename website and repository
Move private macro from header to C file
Add some missing 'static' on a few objects
Fix whitespace issues
Minor portability fix in benchmark
* development: (100 commits)
Update Changelog for the mem-measure branch
Fix issues introduced when rebasing
Fix compile error in memory_buffer_alloc_selftest
Code cosmetics
Add curve25519 to ecc-heap.sh
Add curve25519 to the benchmark program
Fix compile issue when buffer_alloc not available
New script ecc-heap.sh
Fix unused variable issue in some configs
Rm usunused member in private struct
Add heap usage for PK in benchmark
Use memory_buffer_alloc() in benchmark if available
Only define mode_func if mode is enabled (CBC etc)
PKCS8 encrypted key depend on PKCS5 or PKCS12
Disable SRV_C for client measurement
Output stack+heap usage with massif
Enable NIST_OPTIM by default for config-suite-b
Refactor memory.sh
Adapt memory.sh to config-suite-b
Adapt mini-client for config-suite-b.h
...
Conflicts:
ChangeLog
include/polarssl/net.h
library/Makefile
library/error.c
library/ssl_tls.c
programs/Makefile
programs/ssl/ssl_client2.c
programs/ssl/ssl_server2.c
tests/Makefile
* rich/platform:
Remove dependency on sscanf in lib x509
Fix extra guard in memory_buffer_alloc
rebase from development
implemented macro overriding for polarssl_* library functions
fix bug introduced by the addition of snprintf and assert macro which caused tests to fail without polarssl_platform_c defined
add initial symbols to config and checks to check_config to allow use of macros to define standard functions
reformat and arrange additions to config alphabetically
add missing checks to check_config
add macro definition of assert using polarssl_exit
modify library/memory_buffer_alloc.c, benchmark.c and the tests main code to use polarssl_exit
add POLARSSL_PLATFORM_EXIT_ALT
modify scripts/* and tests/* to use polarssl_snprintf
modify programs/*.c to use polarssl_snprintf
modify library/debug.c to use polarssl_snprintf
modify library/x509*.c to use polarssl_snprintf
modify library/net.c to use polarssl_snprintf
modify oid.c to use polarssl_snprintf
add platform_set_snprintf
Conflicts:
library/memory_buffer_alloc.c
programs/pkey/pk_sign.c
programs/pkey/pk_verify.c
programs/pkey/rsa_sign_pss.c
programs/pkey/rsa_verify_pss.c
programs/ssl/ssl_client2.c
programs/ssl/ssl_pthread_server.c
programs/test/benchmark.c
programs/test/ssl_cert_test.c
* development: (46 commits)
Fix url again
Fix small bug in base64_encode()
Fix depend that was checked but not documented
Fix dependency that was not checked
Minor gitginore fixes
Move some ignore patterns to subdirectories
Ignore CMake/MSVC-related build files.
Re-categorize changelog entry
Fix misattribution
Minor nits with stdout/stderr.
Add cmake compatibility targets
Add script for polarssl symlink creation
Fix more stdio inclusion issues
Add debug info for cert/suite selection
Fix possible portability issue
Fix bug in ssl_get_verify_result()
aescrypt2.c local char array not initial
Update Changelog
Fix mips64 bignum implementation
Fix usage string of ssl_client2
...
Conflicts:
include/polarssl/ssl.h
library/CMakeLists.txt
library/Makefile
programs/Makefile
programs/ssl/ssl_client2.c
programs/ssl/ssl_server2.c
visualc/VS2010/PolarSSL.sln
visualc/VS2010/mbedTLS.vcxproj
visualc/VS6/mbedtls.dsp
visualc/VS6/mbedtls.dsw
* development:
Update copyright
Fix issue in compat.sh
Rename doxyfile
Rename to mbed TLS in tests/
Rename to mbed TLS in examples
Remove old test certificates.
Rename to mbed TLS in the documentation/comments
Change name to mbed TLS in the copyright notice
Conflicts:
doxygen/input/doc_mainpage.h
doxygen/mbedtls.doxyfile
include/polarssl/version.h
tests/compat.sh
* development:
Adapt tests to new defaults/errors.
Fix typos/cosmetics in Changelog
Disable RC4 by default in example programs.
Add ssl_set_arc4_support()
Set min version to TLS 1.0 in programs
Conflicts:
include/polarssl/ssl.h
library/ssl_cli.c
library/ssl_srv.c
tests/compat.sh
* commit '36adc36':
Add support for getrandom()
Use library default for trunc-hmac in ssl_client2
Make truncated hmac a runtime option server-side
Fix portability issue in script
Specific error for suites in common but none good
Prefer SHA-1 certificates for pre-1.2 clients
Some more refactoring/tuning.
Minor refactoring
Conflicts:
include/polarssl/error.h
include/polarssl/ssl.h
library/error.c
* commit 'b2eaac1':
Stop assuming chars are signed
Add tests for CBC record splitting
Fix tests that were failing with record splitting
Allow disabling record splitting at runtime
Add 1/n-1 record splitting
Enhance doc on ssl_write()
Conflicts:
include/polarssl/ssl.h
programs/ssl/ssl_client2.c
programs/ssl/ssl_server2.c
* commit 'f6080b8':
Fix warning in reduced configs
Adapt to "negative" switch for renego
Add tests for periodic renegotiation
Make renego period configurable
Auto-renegotiate before sequence number wrapping
Update Changelog for compile-option renegotiation
Switch from an enable to a disable flag
Save 48 bytes if SSLv3 is not defined
Make renegotiation a compile-time option
Add tests for renego security enforcement
Conflicts:
include/polarssl/ssl.h
library/ssl_cli.c
library/ssl_srv.c
library/ssl_tls.c
programs/ssl/ssl_server2.c
tests/ssl-opt.sh
* commit '8b9bcec':
Stop assuming chars are signed
Fix len miscalculation in buffer-based allocator
Fix NULL dereference in buffer-based allocator
Add test_suite_memory_buffer_alloc
Add memory_buffer_alloc_self_test()
Fix missing bound check
Add test for ctr_drbg_update() input sanitizing
Refactor for clearer correctness/security
Stop assuming chars are signed
Conflicts:
library/ssl_tls.c
Depending on timing we might get different errors (conn_reset, write failed)
and ignoring them all ends up being almost the same as just not checking
errors.
Rationale: if people want to disable RC4 but otherwise keep the default suite
list, it was cumbersome. Also, since it uses a global array,
ssl_list_ciphersuite() is not a convenient place. So the SSL modules look like
the best place, even if it means temporarily adding one SSL setting.
* etm:
Fix warning in reduced config
Update Changelog for EtM
Keep EtM state across renegotiations
Adjust minimum length for EtM
Don't send back EtM extension if not using CBC
Fix for the RFC erratum
Implement EtM
Preparation for EtM
Implement initial negotiation of EtM
Conflicts:
include/polarssl/check_config.h
* session-hash:
Update Changelog for session-hash
Make session-hash depend on TLS versions
Forbid extended master secret with SSLv3
compat.sh: allow git version of gnutls
compat.sh: make options a bit more robust
Implement extended master secret
Add negotiation of Extended Master Secret
Conflicts:
include/polarssl/check_config.h
programs/ssl/ssl_server2.c
