Commit graph

5225 commits

Author SHA1 Message Date
Gilles Peskine 2a458daa11 all.sh: test with SHA-1 enabled
Enabling SHA-1 for certificates is deprecated but we still want it to work.

Thanks to @andresag01
2017-06-06 18:44:14 +02:00
Gilles Peskine 5d2511c4d4 SHA-1 deprecation: allow it in key exchange
By default, keep allowing SHA-1 in key exchange signatures. Disabling
it causes compatibility issues, especially with clients that use
TLS1.2 but don't send the signature_algorithms extension.

SHA-1 is forbidden in certificates by default, since it's vulnerable
to offline collision-based attacks.
2017-06-06 18:44:14 +02:00
Gilles Peskine 682df09159 Allow SHA-1 in server tests, when the signature_algorithm extension is not used 2017-06-06 18:44:14 +02:00
Gilles Peskine fd14bca6dc Document test data makefile 2017-06-06 18:44:14 +02:00
Gilles Peskine 4fa6bed0c6 X.509 tests: obey compile-time SHA-1 support option
There is now one test case to validate that SHA-1 is rejected in
certificates by default, and one test case to validate that SHA-1 is
supported if MBEDTLS_TLS_DEFAULT_ALLOW_SHA1 is #defined.
2017-06-06 18:44:14 +02:00
Gilles Peskine 62469d95e2 Allow SHA-1 in test scripts 2017-06-06 18:44:14 +02:00
Gilles Peskine bc70a1836b Test that SHA-1 defaults off
Added tests to validate that certificates signed using SHA-1 are
rejected by default, but accepted if SHA-1 is explicitly enabled.
2017-06-06 18:44:14 +02:00
Gilles Peskine cd3c845157 Allow SHA-1 in SSL renegotiation tests
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.
2017-06-06 18:44:13 +02:00
Gilles Peskine 2dc81a0cbc Test that X.509 verification rejects SHA-256 by default 2017-06-06 18:44:13 +02:00
Gilles Peskine ef86ab238f Allow SHA-1 in X.509 and TLS tests
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.
2017-06-06 18:44:13 +02:00
Gilles Peskine 750c353c5c X.509 self-tests: replaced SHA-1 certificates by SHA-256 2017-06-06 18:44:13 +02:00
Gilles Peskine f040a17604 Added SHA256 test certificates
With SHA-1 deprecation, we need a few certificates using algorithms in
the default support list. Most tests still use SHA-1 though.

The generation process for the new certificates is recorded in the makefile.
2017-06-06 18:44:13 +02:00
Gilles Peskine 5e79cb3662 Remove SHA-1 in TLS by default
Default to forbidding the use of SHA-1 in TLS where it is unsafe: for
certificate signing, and as the signature hash algorithm for the TLS
1.2 handshake signature. SHA-1 remains allowed in HMAC-SHA-1 in the
XXX_SHA ciphersuites and in the PRF for TLS <= 1.1.

For easy backward compatibility for use in controlled environments,
turn on the MBEDTLS_TLS_DEFAULT_ALLOW_SHA1 compiled-time option.
2017-06-06 18:44:13 +02:00
Manuel Pégourié-Gonnard 23b33f8663 Merge remote-tracking branch 'hanno/sig_hash_compatibility' into development
* hanno/sig_hash_compatibility:
  Improve documentation
  Split long lines
  Remember suitable hash function for any signature algorithm.
  Introduce macros and functions to characterize certain ciphersuites.
2017-06-06 18:14:57 +02:00
Hanno Becker eccf60caab Adapt ChangeLog 2017-06-05 15:19:01 +01:00
Hanno Becker 8435c381bd Remove use of size zero array in ECJPAKE test suite
The ECJPAKE test suite uses a size zero array for the empty password
used in the tests, which is not valid C. This commit fixes this.

This originally showed up as a compilation failure on Visual Studio
2015, documented in IOTSSL-1242, but can also be observed with GCC
when using the -Wpedantic compilation option.
2017-06-05 15:10:59 +01:00
Gilles Peskine d50177fdf3 Fix FALLBACK_SCSV parsing
Fixed a bug in ssl_srv.c when parsing TLS_FALLBACK_SCSV in the
ciphersuite list that caused it to miss it sometimes. Reported by Hugo
Leisink as issue #810. Fix initially by @andreasag01; this commit
isolates the bug fix and adds a non-regression test.
2017-05-16 17:53:03 +02:00
Simon Butcher 9f77017a8d Updated version number to 2.5.0 2017-05-16 10:22:37 +01:00
Simon Butcher fea2078e84 Add new header file to VS2010 project files 2017-05-16 10:22:37 +01:00
Andres AG f5bf7189d3 Change return type of AES decrypt and encrypt
This patch modifies the following 2 functions in the AES module to
change the return type from void to int:
    * mbedtls_aes_encrypt() -> mbedtls_internal_aes_encrypt()
    * mbedtls_aes_decrypt() -> mbedtls_internal_aes_decrypt()
This change is necessary to allow users of MBEDTLS_AES_ALT,
MBEDTLS_AES_DECRYPT_ALT and MBEDTLS_AES_ENCRYPT_ALT to return an error
code when replacing the default with their own implementation, e.g.
a hardware crypto accelerator.
2017-05-16 10:22:37 +01:00
Janos Follath 2850cdaed9 Add Changelog entry for RSA exponent blinding 2017-05-16 10:22:37 +01:00
Janos Follath c66e5596ba Add Changelog entry for CA list suppression 2017-05-16 10:22:37 +01:00
Andres Amaya Garcia 46fe17ecf2 Remove obsolete macros from compat-1.3.h 2017-05-16 10:22:37 +01:00
Gilles Peskine 18ac716021 RSA: wipe more stack buffers
MGF mask and PSS salt are not highly sensitive, but wipe them anyway
for good hygiene.
2017-05-16 10:22:37 +01:00
Gilles Peskine 4a7f6a0ddb RSA: wipe stack buffers
The RSA private key functions rsa_rsaes_pkcs1_v15_decrypt and
rsa_rsaes_oaep_decrypt put sensitive data (decryption results) on the
stack. Wipe it before returning.

Thanks to Laurent Simon for reporting this issue.
2017-05-16 10:22:37 +01:00
Simon Butcher 77da95357f Add fix for #667 to ChangeLog 2017-05-16 10:22:37 +01:00
Simon Butcher 4775e83337 Fix ChangeLog
Fixes the ChangeLog following the merge of the ECP HW acceleration interfaces
in aab9efb.
2017-05-16 10:22:37 +01:00
Janos Follath 6e876988de Fix bug in threading sample implementation #667 2017-05-16 10:22:37 +01:00
Janos Follath 45182a0065 Add Changelog entry for RSA exponent blinding 2017-05-16 10:22:37 +01:00
Janos Follath f9203b4139 Add exponent blinding to RSA with CRT
The sliding window exponentiation algorithm is vulnerable to
side-channel attacks. As a countermeasure we add exponent blinding in
order to prevent combining the results of different measurements.

This commit handles the case when the Chinese Remainder Theorem is used
to accelerate the computation.
2017-05-16 10:22:37 +01:00
Janos Follath e81102e476 Add exponent blinding to RSA without CRT
The sliding window exponentiation algorithm is vulnerable to
side-channel attacks. As a countermeasure we add exponent blinding in
order to prevent combining the results of fifferent measurements.

This commits handles the case when the Chinese Remainder Theorem is NOT
used to accelerate computations.
2017-05-16 10:22:37 +01:00
Janos Follath 7a8a090f55 Add Changelog entry for CA list suppression 2017-05-16 10:22:37 +01:00
Janos Follath 89baba2375 Add tests for the CA suppression option 2017-05-16 10:22:37 +01:00
Janos Follath 4817e27d4d Add the CA list suppression option to ssl_server2
Adding the CA suppression list option to the 'ssl_server2' sample
program is a prerequisite for adding tests for this feature to the
integration test suite (ssl-opt.sh).
2017-05-16 10:22:37 +01:00
Janos Follath 088ce43ffe Implement optional CA list suppression in Certificate Request
According to RFC5246 the server can indicate the known Certificate
Authorities or can constrain the aurhorisation space by sending a
certificate list. This part of the message is optional and if omitted,
the client may send any certificate in the response.

The previous behaviour of mbed TLS was to always send the name of all the
CAs that are configured as root CAs. In certain cases this might cause
usability and privacy issues for example:
- If the list of the CA names is longer than the peers input buffer then
  the handshake will fail
- If the configured CAs belong to third parties, this message gives away
  information on the relations to these third parties

Therefore we introduce an option to suppress the CA list in the
Certificate Request message.

Providing this feature as a runtime option comes with a little cost in
code size and advantages in maintenance and flexibility.
2017-05-16 10:22:37 +01:00
Andres Amaya Garcia 75fdf631fd Remove obsolete macros from compat-1.3.h 2017-05-16 10:22:37 +01:00
Hanno Becker cf7ae7e7d3 Improve documentation 2017-05-15 11:50:13 +01:00
Hanno Becker 0d0cd4b30e Split long lines 2017-05-15 11:50:13 +01:00
Hanno Becker 7e5437a972 Remember suitable hash function for any signature algorithm.
This commit changes `ssl_parse_signature_algorithms_ext` to remember
one suitable ( := supported by client and by our config ) hash
algorithm per signature algorithm.

It also modifies the ciphersuite checking function
`ssl_ciphersuite_match` to refuse a suite if there
is no suitable hash algorithm.

Finally, it adds the corresponding entry to the ChangeLog.
2017-05-15 11:50:11 +01:00
Hanno Becker 1aa267cbc3 Introduce macros and functions to characterize certain ciphersuites.
The routine `mbedtls_ssl_write_server_key_exchange` heavily depends on
what kind of cipher suite is active: some don't need a
ServerKeyExchange at all, some need (EC)DH parameters but no server
signature, some require both. Each time we want to restrict a certain
piece of code to some class of ciphersuites, it is guarded by a
lengthy concatentation of configuration checks determining whether at
least one of the relevant cipher suites is enabled in the config; on
the code level, it is guarded by the check whether one of these
cipher suites is the active one.

To ease readability of the code, this commit introduces several helper
macros and helper functions that can be used to determine whether a
certain class of ciphersuites (a) is active in the config, and
(b) contains the currently present ciphersuite.
2017-05-15 11:46:57 +01:00
Andres Amaya Garcia af610a0baf Fix check-doxy-blocks.pl errors (cmac.c ecjpake.h) 2017-05-12 00:18:04 +01:00
Andres Amaya Garcia d3f0f5e1c8 Fix check-doxy-blocks.pl to run from root dir
Modify tests/scripts/check-doxy-blocks.pl to ensure that:
  * It can only be run from the mbed TLS root directory.
  * An error code is returned to the environment when a potential error
    in the source code is found.
2017-05-12 00:16:50 +01:00
Janos Follath 5634b8609b Apply feedback to ECP internal interface documentation 2017-05-11 22:42:14 +01:00
Janos Follath aab9efb4ce Add doxygen documentation to the new ECP interface
Document the functions in the Elliptic Curve Point module hardware
acceleration to guide silicon vendors when implementing the drivers.
2017-05-11 22:42:14 +01:00
Janos Follath 6c8ccd5be4 Fix cleanup label alignment 2017-05-11 22:42:14 +01:00
Janos Follath 7e2406f6f0 Add Changelog entry 2017-05-11 22:42:14 +01:00
Janos Follath 69b2051e76 Update version features with ECP macros 2017-05-11 22:42:14 +01:00
Janos Follath 333d163523 Remove obsolote ECP abstraction macros
Some macros have been removed from the Elliptic Curve Point abstraction
layer, and they shouldn't have remained in the check_config.h
2017-05-11 22:42:14 +01:00
Janos Follath c44ab97cc9 Apply review feedback on ECP interface
Naming conventions are revised, style issues corrected and minor
optimisation added.
2017-05-11 22:42:14 +01:00
Janos Follath b8a90fb51c Update ECP hardware abstraction interface
With this commit the Elliptic Curve Point interface is rewised. Two
compile time options has been removed to simplify the interface and
the function names got a new prefix that indicates that these functions
are for internal use and not part of the public interface.
2017-05-11 22:42:14 +01:00