Commit graph

3116 commits

Author SHA1 Message Date
Andres Amaya Garcia 106637fc2d Correctly handle leap year in x509_date_is_valid()
This patch ensures that invalid dates on leap years with 100 or 400
years intervals are handled correctly.
2017-10-12 19:54:46 +01:00
Ron Eldor 3226d36d61 Fix typo in configuration
Change duplicate of MBEDTLS_ECDH_GEN_PUBLIC_ALT to
MBEDTLS_ECDH_COMPUTE_SHARED_ALT
2017-10-12 14:17:48 +03:00
Hanno Becker ebd2c024dc Don't require P,Q in rsa_private if neither CRT nor blinding used 2017-10-12 10:57:39 +01:00
Hanno Becker efa14e8b0c Reduce number of MPI's used in pk_parse_key_pkcs1_der
As the optional RSA parameters DP, DQ and QP are effectively discarded (they are only considered for their length to
ensure that the key fills the entire buffer), it is not necessary to read them into separate MPI's.
2017-10-11 19:45:19 +01:00
Hanno Becker b82a5b554c Fix typos and mixup related to RSA_NO_CRT 2017-10-11 19:12:00 +01:00
Hanno Becker 5d42b53e51 Enhance documentation and performance of mbedtls_rsa_deduce_primes 2017-10-11 16:36:00 +01:00
Hanno Becker 7643d4e30c Fix number of loop iterations in mbedtls_deduce_primes
The number of loop iterations per candidate in `mbedtls_deduce_primes` was off
by one. This commit corrects this and removes a toy non-example from the RSA
test suite, as it seems difficult to have the function fail on small values of N
even if D,E are corrupted.
2017-10-11 16:32:49 +01:00
Hanno Becker 14a00c0578 Add early detection of bad parameters in mbedtls_deduce_primes 2017-10-11 12:58:23 +01:00
Ron Eldor 8dd73e62d2 Parse Signature Algorithm ext when renegotiating
Signature algorithm extension was skipped when renegotiation was in
progress, causing the signature algorithm not to be known when
renegotiating, and failing the handshake. Fix removes the renegotiation
step check before parsing the extension.
2017-10-11 12:49:00 +01:00
Hanno Becker a565f54c4c Introduce new files rsa_internal.[ch] for RSA helper functions
This commit splits off the RSA helper functions into separate headers and
compilation units to have a clearer separation of the public RSA interface,
intended to be used by end-users, and the helper functions which are publicly
provided only for the benefit of designers of alternative RSA implementations.
2017-10-11 11:00:19 +01:00
Hanno Becker 705fc68d72 Unify sanity checks for RSA private and public keys 2017-10-10 18:01:25 +01:00
Hanno Becker e867489ff6 Remove outdated comments from mbedtls_rsa_complete 2017-10-10 17:56:14 +01:00
Ron Eldor a84c1cb355 Address PR cpomments reviews
1) move the change into Features from Changes, in the changLog
2) Change the feature alternative configuration MBEDTLS_ECDH_ALT
definition to function alternative defintions
MBEDTLS_ECDH_COMPUTE_SHARED_ALT and MBEDTLS_ECDH_GEN_PUBLIC_ALT
2017-10-10 19:04:27 +03:00
Hanno Becker 7f25f850ac Adapt uses of mbedtls_rsa_complete to removed PRNG argument 2017-10-10 16:56:22 +01:00
Hanno Becker f9e184b9df Remove PRNG argument from mbedtls_rsa_complete 2017-10-10 16:55:41 +01:00
Ron Eldor 314adb6baa Address PR review comments
1) update ChangLog to have new feature in Features instead of Changes
2) Change MBEDTLS_ECDSA_ALT to function specific alternative definitions:
MBEDTLS_ECDSA_SIGN_ALT, MBEDTLS_ECDSA_VERIFY_ALT and MBEDTLS_ECDSA_GENKEY_ALT
2017-10-10 18:49:02 +03:00
Hanno Becker 68b4d58bd8 Remove PRNG argument from mbedtls_rsa_deduce_moduli
It is not necessary to pass a CSPRNG to `mbedtls_rsa_deduce_moduli`, as there
exist well-working static strategies, and even if a PRNG is preferred, a
non-secure one would be sufficient.

Further, the implementation is changed to use a static strategy for the choice
of candidates which according to some benchmarks even performs better than the
previous one using random candidate choices.
2017-10-10 16:39:10 +01:00
Andres Amaya Garcia 86968c6dd1 Fix typo and bracketing in macro args 2017-10-07 18:29:03 +01:00
Andres Amaya Garcia 6bce9cb5ac Always print gmt_unix_time in TLS client
Change ssl_parse_server_hello() so that the parsed first four random
bytes from the ServerHello message are printed by the TLS client as
a Unix timestamp regardless of whether MBEDTLS_DEBUG_C is defined. The
debug message will only be printed if debug_level is 3 or higher.

Unconditionally enabling the debug print enabled testing of this value.
2017-10-06 11:59:13 +01:00
Hanno Becker 1a9a51c7cf Enhance documentation of ssl_write_hostname_ext, adapt ChangeLog.
Add a reference to the relevant RFC, adapt ChangeLog.
2017-10-06 11:58:50 +01:00
Hanno Becker 947194e7cf Make mbedtls_ssl_set_hostname safe to be called multiple times
Zeroize and free previously set hostnames before overwriting
them. Also, allow clearance of hostname by providing NULL parameter.
2017-10-06 11:58:50 +01:00
Andres Amaya Garcia 074c58f08b Always print gmt_unix_time in TLS client
Change ssl_parse_server_hello() so that the parsed first four random
bytes from the ServerHello message are printed by the TLS client as
a Unix timestamp regardless of whether MBEDTLS_DEBUG_C is defined. The
debug message will only be printed if debug_level is 3 or higher.

Unconditionally enabling the debug print enabled testing of this value.
2017-10-06 11:55:32 +01:00
Hanno Becker bc389d1d3c Extend scope of ERR_RSA_UNSUPPORTED_OPERATION error code 2017-10-05 11:49:53 +01:00
Hanno Becker 3cdc711972 Deprecate usage of RSA primitives with wrong key type
Further, state explicitly that wrong key types need not be supported by alternative RSA implementations, and that those
may instead return the newly introduced error code MBEDTLS_ERR_RSA_UNSUPPORTED_OPERATION.
2017-10-05 10:28:21 +01:00
Hanno Becker a90658f248 Add ssl_conf_dh_param_bin superseding ssl_conf_dh_param 2017-10-04 15:29:08 +01:00
Hanno Becker 470a8c4d87 Deprecate mbedtls_ssl_conf_dh_param 2017-10-04 15:28:46 +01:00
Hanno Becker 184f675256 Improve debugging output 2017-10-04 13:47:33 +01:00
Hanno Becker a6dd90de30 Add error string for failure code in mbedtls_dhm_set_group 2017-10-04 13:17:52 +01:00
Hanno Becker ab74056037 Make use of mbedtls_dhm_set_group when generating DHM params 2017-10-04 13:17:52 +01:00
Hanno Becker 8880e75dcb Add new function mbedtls_dhm_set_group to DHM Group 2017-10-04 13:17:52 +01:00
Hanno Becker 00d0a6834a Adapt code setting default DHM parameters 2017-10-04 13:17:49 +01:00
Hanno Becker e2fcfa84ea Stick to the use of constant-macros
This commit returns to using constant macros instead of global variables for the DHM group constants. Further, macros
providing the binary encoding of the primes from RFC 3526 and RFC 7919 are added. The hex-string macros are deprecated.
2017-10-04 13:12:15 +01:00
Hanno Becker 0f65e0ca03 Rename rsa_deduce_moduli to rsa_deduce_primes 2017-10-03 14:40:44 +01:00
Hanno Becker 8ba6ce4f4f Rename rsa_deduce_private to rsa_deduce_private_exponent 2017-10-03 14:40:43 +01:00
Hanno Becker 45a0ef32d9 Correct memory leak in mbedtls_rsa_validate_crt 2017-10-03 14:32:56 +01:00
Hanno Becker e58d38c66f Minor improvements 2017-10-03 07:59:29 +01:00
Hanno Becker 2b2f898cbd Streamline code-path in rsa_rsassa_pkcs1_v15_encode 2017-10-03 07:59:29 +01:00
Hanno Becker 64a8c0acd6 Verify PKCS1 v1.5 signature without parsing
This commit modifies the PKCS1 v1.5 signature verification function `mbedtls_rsa_rsassa_pkcs1_v15_verify` to prepare the
expected PKCS1-v1.5-encoded hash using the function also used by the signing routine `mbedtls_rsa_rsassa_pkcs1_v15_sign`
and comparing it to the provided byte-string afterwards. This comes at the benefits of (1) avoiding any error-prone
parsing, (2) removing the dependency of the RSA module on the ASN.1 parsing module, and (3) reducing code size.
2017-10-03 07:58:00 +01:00
Hanno Becker fdf38030de Outsource code for generating PKCS1 v1.5 encoding
This commit moves the code preparing PKCS1 v1.5 encoded hashes from `mbedtls_rsa_rsassa_pkcs1_v15_sign` to a separate
non-public function `rsa_rsassa_pkcs1_v15_encode`. This code-path will then be re-used by the signature verification function
`mbetls_rsa_rsassa_pkcs1_v15_verify` in a later commit.
2017-10-03 07:58:00 +01:00
Hanno Becker 171a8f1c95 Move constant time memcmp for signature verification
This commit replaces the ad-hoc code for constant-time double-checking the PKCS1 v1.5 RSA signature by an invocation of
`mbedtls_safer_memcmp`.
2017-10-03 07:58:00 +01:00
Hanno Becker de6c1644cc Add brackets around arguments of internal macro DHM_MPI_EXPORT 2017-10-02 15:03:15 +01:00
Hanno Becker b5beaa8995 Check that 1 < D, E < N in mbedtls_rsa_validate_params 2017-10-02 13:20:20 +01:00
Hanno Becker c6fc878eda Remove mbedtls_rsa_check_crt
This is no longer needed after the decision to not exhaustively validate private key material.
2017-10-02 13:20:15 +01:00
Hanno Becker 98838b04af Minor improvements 2017-10-02 13:17:01 +01:00
Hanno Becker 7471631dde Make input arguments to mbedtls_rsa_import_raw constant
Original intention was to be allowed to perform in-place operations like changing the byte-order before importing
parameters into an HSM. Now a copy is needed in this case, but there's no more danger of a user expecting the arguments
to be left untouched.
2017-10-02 13:17:01 +01:00
Hanno Becker bdefff1dde Change signature of mbedtls_rsa_deduce_private
Make input arguments constant and adapt the implementation to use a temporary instead of in-place operations.
2017-10-02 09:59:48 +01:00
Hanno Becker ba5b755f1a Change signature and semantics of mbedtls_rsa_deduce_moduli
Input arguments are marked as constant. Further, no double-checking is performed when a factorization of the modulus has
been found.
2017-10-02 09:55:49 +01:00
Hanno Becker 2f38a43d3a Enhance documentation of ssl_write_hostname_ext, adapt ChangeLog.
Add a reference to the relevant RFC, adapt ChangeLog.
2017-09-30 23:35:21 +01:00
Hanno Becker 39f5d359f5 Make mbedtls_ssl_set_hostname safe to be called multiple times
Zeroize and free previously set hostnames before overwriting
them. Also, allow clearance of hostname by providing NULL parameter.
2017-09-30 23:35:02 +01:00
Hanno Becker b4274210a4 Improve documentation in pkparse.c
State explicitly that `pk_parse_pkcs8_undencrypted_der` and `pk_parse_key_pkcs8_encrypted_der` are not responsible for
zeroizing and freeing the provided key buffer.
2017-09-29 19:18:51 +01:00
Hanno Becker f04111f5c5 Fix typo 2017-09-29 19:18:42 +01:00
Hanno Becker 56bae95e1d Improve style and documentation, fix typo 2017-09-29 15:43:49 +01:00
Hanno Becker bead71752e Correct typo in rsa.c 2017-09-29 12:41:06 +01:00
Hanno Becker ba1ba11a98 Check that length is properly set in mbedtls_rsa_check_pubkey 2017-09-29 11:54:05 +01:00
Hanno Becker 2f8f06aa25 Don't always recompute context length in mbedtls_rsa_get_len
This commit changes the implementation of `mbedtls_rsa_get_len` to return
`ctx->len` instead of always re-computing the modulus' byte-size via
`mbedtls_mpi_size`.
2017-09-29 11:54:05 +01:00
Hanno Becker 2cca6f3290 Always deduce N from P, Q in mbedtls_rsa_complete
Previously, a parameter set of (-, P, Q, -, E) was completed, but (-, P, Q, D,
E) wasn't - this is odd.
2017-09-29 11:54:05 +01:00
Hanno Becker e71ad12cd5 Minor code-improvements in dhm.c 2017-09-28 11:06:31 +01:00
Hanno Becker 4c72b000cb Add const-qualifiers to prime constants 2017-09-27 16:06:37 +01:00
Hanno Becker 8c8b0ab877 Change default Diffie-Hellman parameters from RFC 5114 to RFC 7919
The origin of the primes in RFC 5114 is undocumented and their use therefore
constitutes a security risk.
2017-09-27 12:43:57 +01:00
Hanno Becker b2bad800e4 Introduce Diffie-Hellman parameters from RFC 7919 2017-09-27 12:43:55 +01:00
Hanno Becker 0e6dc84f3e Deprecate Diffie-Hellman groups from RFC 5114
Also, change the way the standardized Diffie-Hellman groups are provided from
macro-based string-literals to global variables.
2017-09-27 11:48:02 +01:00
Ron Eldor 2981a0a740 Address Andres PR comments
Address Andres' comments in the PR
2017-09-24 15:41:09 +03:00
Jaeden Amero 1526330931 Allow alternate implementation of GCM
Provide the ability to use an alternative implementation of GCM in place
of the library-provided implementation.
2017-09-22 17:42:44 +01:00
Hanno Becker d8a6f7cfbe Clarify code-paths in x509write_csr and x509write_crt 2017-09-22 16:05:43 +01:00
Hanno Becker a20e33ad59 Use X509 CRT version macros for version checks in x509write_crt_der 2017-09-22 15:40:01 +01:00
Janos Follath 1ad1c6d4e1 Fix typo 2017-09-21 12:05:30 +01:00
Janos Follath aa325d7b7f DHM: Fix dhm_check_range() always returning 0
Although the variable ret was initialised to an error, the
MBEDTLS_MPI_CHK macro was overwriting it. Therefore it ended up being
0 whenewer the bignum computation was successfull and stayed 0
independently of the actual check.
2017-09-21 12:04:41 +01:00
Florin 0b7b83fd91 Fixed SIGSEGV problem when writing with ssl_write_real a buffer that is over MBEDTLS_SSL_MAX_CONTENT_LEN bytes
Signed-off-by: Florin <petriuc.florin@gmail.com>
2017-09-18 16:11:42 +01:00
Hanno Becker 2b187c4d5f Correct typo 2017-09-18 16:11:42 +01:00
Ron Eldor 4a2fb4c6be Addres review comments
Resolves comments raised in the review
2017-09-18 13:43:05 +03:00
Ron Eldor 147d142948 Add log and fix stle issues
Address Andres comments of PR
2017-09-18 13:05:53 +03:00
Ron Eldor 714785dcc2 Write correct number of ciphersuites in log
Change location of log, to fit the correct number of used ciphersuites
2017-09-18 13:05:48 +03:00
Hanno Becker 9648f8b59c Add run-time check for handshake message size in ssl_write_record 2017-09-18 10:56:15 +01:00
Hanno Becker d33f1ca34c Add run-time check for record content size in ssl_encrypt_buf 2017-09-18 10:56:14 +01:00
Andres Amaya Garcia 01692531c6 Document code silently discarding invalid records 2017-09-14 20:20:31 +01:00
Andres Amaya Garcia 2fad94b193 Dont send alert on invalid DTLS record type
Do not send fatal alerts when receiving a record with an invalid header
while running DTLS as this is not compliant behaviour.
2017-09-14 20:18:37 +01:00
Hanno Becker d4a872ee67 Rename internal MBEDTLS_ENTROPY_HAVE_STRONG to ENTROPY_HAVE_STRONG
This commit renames the test-only flag MBEDTLS_ENTROPY_HAVE_STRONG to ENTROPY_HAVE_STRONG to make it more transparent
that it's an internal flag, and also to content the testscript tests/scripts/check-names.pl which previously complained
about the macro occurring in a comment in `entropy.c` without being defined in a library file.
2017-09-14 08:04:13 +01:00
Hanno Becker 45037ceac5 Add check for presence of relevant parameters in mbedtls_rsa_private
If CRT is used, check for the presence N, P, Q, D, E, DP, DQ and QP. If CRT is
not used, check for N, P, Q, D, E only.
2017-09-14 08:02:14 +01:00
Hanno Becker 81535d0011 Minor style and typo corrections 2017-09-14 07:51:54 +01:00
Hanno Becker 476986547b Omit version from X.509 v1 certificates
The version field in an X.509 certificate is optional and defaults to v1, so it
may be omitted in this case.
2017-09-14 07:51:54 +01:00
Hanno Becker d7f3520360 Don't add extensions for X.509 non-v3 certificates
This commit removes extension-writing code for X.509 non-v3 certificates from
mbedtls_x509write_crt_der. Previously, even if no extensions were present an
empty sequence would have been added.
2017-09-14 07:51:54 +01:00
Hanno Becker fc77144802 Fix extraction of signature-type from PK context instance 2017-09-14 07:51:54 +01:00
Hanno Becker 9be1926b69 Correct parsing checks in mbedtls_pk_parse_key
Two code-paths in `mbedtls_pk_parse_key` returned success on a failure in `mbedtls_pk_setup`.
2017-09-08 12:39:44 +01:00
Hanno Becker 66a0f83d58 Remove unreachable branches in pkparse.c 2017-09-08 12:39:21 +01:00
Hanno Becker b8d1657148 Mention in-place decryption in pk_parse_key_pkcs8_encrypted_der
Also fixes a typo.
2017-09-07 15:29:01 +01:00
Hanno Becker 2aa80a706f Remove unnecessary cast 2017-09-07 15:28:45 +01:00
Ron Eldor bc18eb3b92 Fix compilation error with Mingw32
Fix compilation error on Mingw32 when `_TRUNCATE` is defined. Use
`_TRUNCATE` only if `__MINGW32__` not defined. Fix suggested by
Thomas Glanzmann and Nick Wilson on issue #355
2017-09-06 17:51:14 +03:00
Ron Eldor 65112b15e6 Adress Hannos's comments
Remove zeroizing buffer, as it was done already in PR #369
Check that buffer is not null by `!= NULL` statement
2017-09-06 17:09:41 +03:00
Ron Eldor 9d84b4c102 update after Andres comments
Update after Andres coments:
1. zeroize the buffer in `mbedtls_pem_read_buffer()` before freeing it
2. use `mbedtls_zeroize()` instead of `memset()`
2017-09-05 17:17:31 +03:00
Ron Eldor 31162e4423 Set PEM buffer to zero before freeing it
Set PEM buffer to zero before freeing it, to avoid private keys
being leaked to memory after releasing it.
2017-09-05 15:34:35 +03:00
Ron Eldor 7268ca9500 remove redundant include
Remove redunadnat include for platform.h which was acciddently pushed,
for debugging purposes
2017-09-05 14:29:20 +03:00
Hanno Becker 9c6cb38ba8 Fix typo in pkparse.c 2017-09-05 10:08:01 +01:00
Hanno Becker fab3569963 Use in-place decryption in pk_parse_pkcs8_encrypted_der
The stack buffer used to hold the decrypted key in pk_parse_pkcs8_encrypted_der
was statically sized to 2048 bytes, which is not enough for DER encoded 4096bit
RSA keys.

This commit resolves the problem by performing the key-decryption in-place,
circumventing the introduction of another stack or heap copy of the key.

There are two situations where pk_parse_pkcs8_encrypted_der is invoked:
1. When processing a PEM-encoded encrypted key in mbedtls_pk_parse_key.
   This does not need adaption since the PEM context used to hold the decoded
   key is already constructed and owned by mbedtls_pk_parse_key.
2. When processing a DER-encoded encrypted key in mbedtls_pk_parse_key.
   In this case, mbedtls_pk_parse_key calls pk_parse_pkcs8_encrypted_der with
   the buffer provided by the user, which is declared const. The commit
   therefore adds a small code paths making a copy of the keybuffer before
   calling pk_parse_pkcs8_encrypted_der.
2017-08-25 13:57:21 +01:00
Hanno Becker 771d30edac Add missing calls to mbedtls_pem_free in mbedtls_pk_parse 2017-08-25 13:57:21 +01:00
Hanno Becker b269a8584a Change mbedtls_rsa_check_privkey to use new helper functions 2017-08-25 08:35:09 +01:00
Hanno Becker d9431a7817 Minor comments improvement 2017-08-25 08:35:09 +01:00
Hanno Becker d363799a9d Add mbedtls_rsa_validate_crt
This commit adds the function mbedtls_rsa_validate_crt for validating a set of CRT parameters. The function
mbedtls_rsa_check_crt is simplified accordingly.
2017-08-25 08:35:09 +01:00
Hanno Becker d56d83a7f3 Remove double-checking code from rsa_deduce_moduli and rsa_complete 2017-08-25 08:35:08 +01:00
Hanno Becker 750e8b4596 Rename rsa_check_params->rsa_validate_params and change error codes 2017-08-25 08:34:55 +01:00
Hanno Becker fb81c0ec2e Guard primality checks in RSA module by MBEDTLS_GENPRIME
Primality testing is guarded by the configuration flag MBEDTLS_GENPRIME and used in the new RSA helper functions. This
commit adds a corresponding preprocessor directive.
2017-08-24 06:55:11 +01:00
Hanno Becker ab3773123c Add support for alternative RSA implementations
Alternative RSA implementations can be provided by defining MBEDTLS_RSA_ALT in
config.h, defining an mbedtls_rsa_context struct in a new file rsa_alt.h and
re-implementing the RSA interface specified in rsa.h.

Through the previous reworkings, the adherence to the interface is the only
implementation obligation - in particular, implementors are free to use a
different layout for the RSA context structure.
2017-08-23 16:24:51 +01:00
Hanno Becker 6345dd33b9 Adapt rsa_check_privkey to deal with NO_CRT option 2017-08-23 16:17:28 +01:00
Hanno Becker bee3aaeb50 Adapt rsa_gen_key to deal with RSA_NO_CRT option 2017-08-23 16:17:28 +01:00
Hanno Becker dc95c890ad Adapt rsa_deduce_crt to deal with RSA_NO_CRT option 2017-08-23 16:17:28 +01:00
Hanno Becker 33c30a0c7e Adapt rsa_copy and rsa_free to deal with RSA_NO_CRT option 2017-08-23 16:17:28 +01:00
Hanno Becker 23344b5fcc Adapt rsa_complete to deal with RSA_NO_CRT option 2017-08-23 16:17:28 +01:00
Hanno Becker 83aad1fa86 Adapt gen_key example program to new RSA interface 2017-08-23 16:17:27 +01:00
Hanno Becker d71dc159a6 Adapt PK test suite to use new interface 2017-08-23 16:17:27 +01:00
Hanno Becker 15f81fa21c Adapt pkwrite.c to new RSA interface 2017-08-23 16:17:27 +01:00
Hanno Becker d58c5b2d16 Adapt pkparse.c to new RSA interface 2017-08-23 16:17:24 +01:00
Hanno Becker 6a1e7e5f4c Adapt pk_wrap.c to new RSA interface
This commit replaces direct manipulation of RSA context structure fields by
calls to the extended RSA interface in pk_wrap.c.
2017-08-23 15:07:40 +01:00
Hanno Becker 3a701161ff Adapt RSA selftest to new RSA interface
This commit replaces direct manipulation of structure fields in the RSA selftest
by calls to the extended interface.
2017-08-23 15:07:40 +01:00
Hanno Becker 8fd5548241 Minor formatting changes 2017-08-23 14:47:25 +01:00
Hanno Becker 617c1aeb18 Implement new RSA interface functions 2017-08-23 14:47:22 +01:00
Hanno Becker e2e8b8da1d Implement RSA helper functions 2017-08-23 14:44:33 +01:00
Simon Butcher 72ea31b026 Update version number to 2.6.0 2017-08-10 11:51:16 +01:00
Ron Eldor 433f39c437 ECDH alternative implementation support
Add alternative implementation support for ECDH at the higher layer
2017-08-08 18:43:56 +03:00
Ron Eldor b68733bf62 ECDSA alternative support
Support for alternative implementation of ECDSA, at the higher layer
2017-08-07 18:00:22 +03:00
Andres Amaya Garcia 7c02c503ea Change PK module preprocessor check on word size
There were preprocessor directives in pk.c and pk_wrap.c that cheked
whether the bit length of size_t was greater than that of unsigned int.
However, the check relied on the MBEDTLS_HAVE_INT64 macro being defined
which is not directly related to size_t. This might result in errors in
some platforms. This change modifies the check to use the macros
SIZE_MAX and UINT_MAX instead making the code more robust.
2017-08-04 13:32:15 +01:00
Simon Butcher a55e084bce Fix naked call to time() with platform call
In ssl_cache.c a call to time() was being made instead of it's platform
equivalent.
2017-07-28 23:46:43 +01:00
Hanno Becker 61937d4a83 Rename time and index parameter to avoid name conflict.
As noted in #557, several functions use 'index' resp. 'time'
as parameter names in their declaration and/or definition, causing name
conflicts with the functions in the C standard library of the same
name some compilers warn about.

This commit renames the arguments accordingly.
2017-07-28 22:28:08 +01:00
Andres AG 2e3ddfac5f Prevent signed integer overflow in CSR parsing
Modify the function mbedtls_x509_csr_parse_der() so that it checks the
parsed CSR version integer before it increments the value. This prevents
a potential signed integer overflow, as these have undefined behaviour
in the C standard.
2017-07-27 21:44:34 +01:00
Andres AG 80164741e1 Fix potential integer overflow parsing DER CRT
This patch prevents a potential signed integer overflow during the
certificate version verification checks.
2017-07-27 21:44:34 +01:00
Andres AG 4f753c1186 Fix potential integer overflow parsing DER CRL
This patch prevents a potential signed integer overflow during the
CRL version verification checks.
2017-07-27 21:44:34 +01:00
Gilles Peskine 683ac27b0f Checked names 2017-07-27 21:44:33 +01:00
Simon Butcher a95d630197 Fix platform setup/teardown feature and comments
Fixed the platform setup/teardown feature, by fixing it for doxygen and adding it
as a feature  in 'version_features.c'.
2017-07-27 21:44:33 +01:00
Andres Amaya Garcia d91f99f868 Rename macro SETUP_ALT to SETUP_TEARDOWN_ALT
Rename the macro MBEDTLS_PLATFORM_SETUP_ALT to
MBEDTLS_PLATFORM_SETUP_TEARDOWN_ALT to make the name more descriptive
as this macro enables/disables both functions.
2017-07-27 21:44:33 +01:00
Andres Amaya Garcia 3c8a39d28a Remove internal functions from setup API 2017-07-27 21:44:33 +01:00
Andres Amaya Garcia 2a6f39cb63 Add library setup and teardown APIs
Add the following two functions to allow platform setup and teardown
operations for the full library to be hooked in:

* mbedtls_platform_setup()
* mbedtls_platform_teardown()

An mbedtls_platform_context C structure is also added and two internal
functions that are called by the corresponding setup and teardown
functions above:

* mbedtls_internal_platform_setup()
* mbedtls_internal_plartform_teardown()

Finally, the macro MBEDTLS_PLATFORM_SETUP_ALT is also added to allow
mbedtls_platform_context and internal function to be overriden by the
user as needed for a platform.
2017-07-27 21:44:33 +01:00
Hanno Becker bedc2050b6 Export mbedtls_aes_(en/de)crypt to retain for API compatibility
The commit f5bf7189d3 made the AES
functions mbedtls_aes_encrypt and mbedtls_aes_decrypt static, changing
the library's API.

This commit reverts this.
2017-07-27 21:44:33 +01:00
Hanno Becker 639ce56b6a Undo API change from SHA1 deprecation
The previous commit bd5ceee484f201b90a384636ba12de86bd330cba removed
the definition of the global constants
- mbedtls_test_ca_crt_rsa_len,
- mbedtls_test_cli_crt_rsa_len,
- mbedtls_test_ca_crt_rsa, and
- mbedtls_test_cli_crt_rsa.
This commit restores these to maintain ABI compatibility.

Further, it was noticed that without SHA256_C being enabled the
previous code failed to compile because because the SHA1 resp. SHA256
certificates were only defined when the respective SHAXXX_C options
were set, but the emission of the global variable mbedtls_test_ca_crt
was unconditionally defined through the SHA256
certificate. Previously, the RSA SHA1 certificate was unconditionally
defined and used for that.

As a remedy, this commit makes sure some RSA certificate is defined
and exported through the following rule:
1. If SHA256_C is active, define an RSA SHA256 certificate and export
   it as mbedtls_test_ca_crt. Also, define SHA1 certificates only if
   SHA1_C is set.
2. If SHA256_C is not set, always define SHA1 certificate and export
   it as mbedtls_test_ca_crt.
2017-07-27 21:44:33 +01:00
Hanno Becker d300a5734a Undo API change
The previous commit b3e6872c93 changed
to public functions from ssl_ciphersuite.h to static inline. This
commit reverts this change.
2017-07-27 21:44:33 +01:00
Ron Eldor 7269fee0b6 Check return code of mbedtls_mpi_fill_random
Add MBEDTLS_MPI_CHK to check for error value of mbedtls_mpi_fill_random.
Reported and fix suggested by guidovranken in #740
2017-07-27 21:44:33 +01:00
Ron Eldor 3e19df5c95 Resource leak fix on windows platform
Fix a resource leak on windows platform, in mbedtls_x509_crt_parse_path,
in case a failure. when an error occurs, goto cleanup, and free the
resource, instead of returning error code immediately.
2017-07-27 21:44:33 +01:00
Ron Eldor 8ab0595538 Wrong preproccessor condition fix
Fix for issue #696
Change #if defined(MBEDTLS_THREADING_PTHREAD)
to #if defined(MBEDTLS_THREADING_C)
2017-07-27 21:44:33 +01:00
Ron Eldor 5a21fd62bf fix for issue 1118: check if iv is zero in gcm.
1) found by roberto in mbedtls forum
2) if iv_len is zero, return an error
3) add tests for invalid parameters
2017-07-27 21:44:33 +01:00
Janos Follath bfea4a7c02 Remove mutexes from ECP hardware acceleration
Protecting the ECP hardware acceleratior with mutexes is inconsistent with the
philosophy of the library. Pre-existing hardware accelerator interfaces
leave concurrency support to the underlying platform.

Fixes #863
2017-07-27 21:44:32 +01:00
Andres AG 642ea1f399 Prevent signed integer overflow in CSR parsing
Modify the function mbedtls_x509_csr_parse_der() so that it checks the
parsed CSR version integer before it increments the value. This prevents
a potential signed integer overflow, as these have undefined behaviour
in the C standard.
2017-07-26 17:19:59 +01:00
Andres AG 487b7a9efc Fix potential integer overflow parsing DER CRT
This patch prevents a potential signed integer overflow during the
certificate version verification checks.
2017-07-26 17:13:03 +01:00
Andres AG 853c46c8d3 Fix potential integer overflow parsing DER CRL
This patch prevents a potential signed integer overflow during the
CRL version verification checks.
2017-07-26 12:07:26 +01:00
Hanno Becker 47deec488f Move flag indicating presence of strong entropy to test code 2017-07-24 15:31:30 +01:00
Hanno Becker c6deafc0d4 Omit RSA key generation test if no strong entropy is present
The RSA key generation test needs strong entropy to succeed. This commit captures the presence of a strong entropy
source in a preprocessor flag and only runs the key generation test if that flag is set.
2017-07-24 09:09:01 +01:00
Gilles Peskine 710f54182f Checked names 2017-07-22 11:53:56 +02:00
Simon Butcher c0da47dd1e Fix platform setup/teardown feature and comments
Fixed the platform setup/teardown feature, by fixing it for doxygen and adding it
as a feature  in 'version_features.c'.
2017-07-21 23:48:55 +01:00
Andres Amaya Garcia 2d0aa8be97 Fix MD selftest to use correct type and expose ret 2017-07-21 14:57:26 +01:00
Andres Amaya Garcia aa464ef23a Fix indentation and add goto cleanup; stmt 2017-07-21 14:27:41 +01:00
Andres Amaya Garcia 9da69514ec Rename macro SETUP_ALT to SETUP_TEARDOWN_ALT
Rename the macro MBEDTLS_PLATFORM_SETUP_ALT to
MBEDTLS_PLATFORM_SETUP_TEARDOWN_ALT to make the name more descriptive
as this macro enables/disables both functions.
2017-07-21 02:12:49 +02:00
Andres Amaya Garcia 82d7314c43 Remove internal functions from setup API 2017-07-21 02:12:49 +02:00
Andres Amaya Garcia 122d899296 Add library setup and teardown APIs
Add the following two functions to allow platform setup and teardown
operations for the full library to be hooked in:

* mbedtls_platform_setup()
* mbedtls_platform_teardown()

An mbedtls_platform_context C structure is also added and two internal
functions that are called by the corresponding setup and teardown
functions above:

* mbedtls_internal_platform_setup()
* mbedtls_internal_plartform_teardown()

Finally, the macro MBEDTLS_PLATFORM_SETUP_ALT is also added to allow
mbedtls_platform_context and internal function to be overriden by the
user as needed for a platform.
2017-07-21 02:11:35 +02:00
Andres Amaya Garcia b2b063ff35 Add comment in entropy.c 2017-07-20 16:45:24 +01:00
Andres Amaya Garcia 3395250f5f Fix use of uninitialised ret ssl_tls.c 2017-07-20 16:29:16 +01:00
Andres Amaya Garcia 42e5e1084e Add goto cleanup; for consistency md.c 2017-07-20 16:27:03 +01:00
Andres Amaya Garcia 46f5a3e9b4 Check return codes from MD in ssl code 2017-07-20 16:17:51 +01:00
Andres Amaya Garcia c5c7d76bf5 Add goto exit; stmt in rsa.c for consistency 2017-07-20 14:42:16 +01:00
Andres Amaya Garcia 0963e6cfac Fix possible memory leak in <MD>_ext() 2017-07-20 14:41:10 +01:00
Andres Amaya Garcia 94682d1d7d Fix use of unitialized ret in rsa.c 2017-07-20 14:26:37 +01:00
Andres Amaya Garcia 6a3f30514a Ensure MD self_test ret codes are not hidden
Also fix a potential memory leak and an incorrect goto statement in
sha1.c self_test
2017-07-20 14:18:54 +01:00
Hanno Becker 489b985fae Export mbedtls_aes_(en/de)crypt to retain for API compatibility
The commit f5bf7189d3 made the AES
functions mbedtls_aes_encrypt and mbedtls_aes_decrypt static, changing
the library's API.

This commit reverts this.
2017-07-20 12:36:53 +02:00
Hanno Becker 0a38f1ac28 Undo API change from SHA1 deprecation
The previous commit bd5ceee484f201b90a384636ba12de86bd330cba removed
the definition of the global constants
- mbedtls_test_ca_crt_rsa_len,
- mbedtls_test_cli_crt_rsa_len,
- mbedtls_test_ca_crt_rsa, and
- mbedtls_test_cli_crt_rsa.
This commit restores these to maintain ABI compatibility.

Further, it was noticed that without SHA256_C being enabled the
previous code failed to compile because because the SHA1 resp. SHA256
certificates were only defined when the respective SHAXXX_C options
were set, but the emission of the global variable mbedtls_test_ca_crt
was unconditionally defined through the SHA256
certificate. Previously, the RSA SHA1 certificate was unconditionally
defined and used for that.

As a remedy, this commit makes sure some RSA certificate is defined
and exported through the following rule:
1. If SHA256_C is active, define an RSA SHA256 certificate and export
   it as mbedtls_test_ca_crt. Also, define SHA1 certificates only if
   SHA1_C is set.
2. If SHA256_C is not set, always define SHA1 certificate and export
   it as mbedtls_test_ca_crt.
2017-07-20 12:36:53 +02:00
Hanno Becker 544039ac59 Undo API change
The previous commit b3e6872c93 changed
to public functions from ssl_ciphersuite.h to static inline. This
commit reverts this change.
2017-07-20 12:36:53 +02:00
Ron Eldor 7875b24287 Check return code of mbedtls_mpi_fill_random
Add MBEDTLS_MPI_CHK to check for error value of mbedtls_mpi_fill_random.
Reported and fix suggested by guidovranken in #740
2017-07-20 01:23:32 +02:00
Ron Eldor eba5dabc61 Resource leak fix on windows platform
Fix a resource leak on windows platform, in mbedtls_x509_crt_parse_path,
in case a failure. when an error occurs, goto cleanup, and free the
resource, instead of returning error code immediately.
2017-07-20 01:02:40 +02:00
Ron Eldor 85bdcf8c16 Wrong preproccessor condition fix
Fix for issue #696
Change #if defined(MBEDTLS_THREADING_PTHREAD)
to #if defined(MBEDTLS_THREADING_C)
2017-07-20 00:44:57 +02:00
Ron Eldor e1b92fee55 fix for issue 1118: check if iv is zero in gcm.
1) found by roberto in mbedtls forum
2) if iv_len is zero, return an error
3) add tests for invalid parameters
2017-07-20 00:11:24 +02:00
Janos Follath a9e775efe4 Remove mutexes from ECP hardware acceleration
Protecting the ECP hardware acceleratior with mutexes is inconsistent with the
philosophy of the library. Pre-existing hardware accelerator interfaces
leave concurrency support to the underlying platform.

Fixes #863
2017-07-19 02:07:59 +01:00
Andres Amaya Garcia 92d46f0246 Zeroize buf if mbedtls_base64_decode() fails 2017-07-07 10:46:51 +01:00
Manuel Pégourié-Gonnard 9107b5fdd3 Improve comments 2017-07-06 12:16:25 +02:00
Manuel Pégourié-Gonnard 31458a1878 Only return VERIFY_FAILED from a single point
Everything else is a fatal error. Also improve documentation about that for
the vrfy callback.
2017-07-06 11:58:41 +02:00
Manuel Pégourié-Gonnard d15795acd5 Improve behaviour on fatal errors
If we didn't walk the whole chain, then there may be any kind of errors in the
part of the chain we didn't check, so setting all flags looks like the safe
thing to do.
2017-07-06 11:58:41 +02:00
Andres Amaya Garcia 6512193eff Zeroize tmp buffer in entropy_update() 2017-07-05 15:45:47 +01:00
Andres Amaya Garcia bbafd34ebb Set len var to 0 when buf is freed in ssl_tls.c 2017-07-05 14:25:21 +01:00
Andres Amaya Garcia af0b31d76f Correctly set buf size in entropy_update_nv_seed() 2017-07-05 14:23:54 +01:00
Andres Amaya Garcia 1a607a1b9a Change ssl_tls to use new MD API and check ret code 2017-06-29 17:09:42 +01:00
Andres Amaya Garcia 95869c4934 Do not start md accumulator in mbedtls_entropy_init
This change moves the calls to mbedtls_sha256_starts() and
mbedtls_sha512_starts() out of the mbedtls_entropy_init() function as
these now have return codes which need to be checked.
2017-06-29 16:31:44 +01:00
Andres Amaya Garcia a7559cb7ba Fix entropy module to work with hw accelerator
This patch modifies the entropy.c module to ensure that the sha256 and
sha512 contexts are correctly initialised and freed instead of skipping
these calls or simply zeroizing with memset() or mbedtls_zeroize().
This is important as the sha contexts might otherwise leak memory or
other resources, and even more so in the context of hardware
accelerators where the configuration of the device might be done in the
init and free calls.
2017-06-29 16:27:15 +01:00
Andres Amaya Garcia 207cea57f9 Change entropy to use new MD API and check ret code 2017-06-29 15:57:46 +01:00
Andres Amaya Garcia 8d08c4489e Change pem to use new MD API and check ret code 2017-06-29 11:16:38 +01:00
Andres Amaya Garcia 0dd4fa0f45 Fix functions in MD layer to check return codes 2017-06-28 14:16:07 +01:00
Andres Amaya Garcia 5f872df26a Change func ptrs to have ret val in MD layer
This patch modifies the internal md context structure in md_wrap.c to
add return values to the function pointers. This enables us to use the
new API in the corresponding MD modules so that failures can be
found at any point in an MD computation.
2017-06-28 14:12:44 +01:00
Andres Amaya Garcia d21d625e1f Change ssl_srv to new MD API and check return code 2017-06-28 13:09:05 +01:00
Andres Amaya Garcia f0e521e9f1 Change ssl_cli to new MD API and check return code 2017-06-28 13:05:06 +01:00
Andres Amaya Garcia 698089e07e Change RSA to use new MD API and check return code 2017-06-28 13:01:15 +01:00
Andres Amaya Garcia 8d8204fc6f Change x509write_crt to use new MD API ret code 2017-06-28 12:52:16 +01:00
Andres Amaya Garcia cccfe08530 Rename md process functions with _internal_ 2017-06-28 12:52:16 +01:00
Andres Amaya Garcia 614c689e05 Add int return values to SHA-512 function calls
The following function calls are being deprecated to introduce int
return values.
    * mbedtls_sha512()
    * mbedtls_sha512_starts()
    * mbedtls_sha512_update()
    * mbedtls_sha512_finish()
    * mbedtls_sha512_process()
The return codes can be used to return error values. This is important
when using hardware accelerators.
2017-06-28 12:52:16 +01:00
Andres Amaya Garcia 72a7f53064 Add int return values to SHA-256 function calls
The following function calls are being deprecated to introduce int
return values.
    * mbedtls_sha256()
    * mbedtls_sha256_starts()
    * mbedtls_sha256_update()
    * mbedtls_sha256_finish()
    * mbedtls_sha256_process()
The return codes can be used to return error values. This is important
when using hardware accelerators.
2017-06-28 12:52:16 +01:00
Andres Amaya Garcia b1a8bf9725 Add int return values to RIPEMD-160 function calls
The following function calls are being deprecated to introduce int
return values.
    * mbedtls_ripemd160()
    * mbedtls_ripemd160_starts()
    * mbedtls_ripemd160_update()
    * mbedtls_ripemd160_finish()
    * mbedtls_ripemd160_process()
The return codes can be used to return error values. This is important
when using hardware accelerators.
2017-06-28 12:52:16 +01:00
Andres Amaya Garcia 2cfd7a982c Add int return values to MD5 function calls
The following function calls are being deprecated to introduce int
return values.
    * mbedtls_md5()
    * mbedtls_md5_starts()
    * mbedtls_md5_update()
    * mbedtls_md5_finish()
    * mbedtls_md5_process()
The return codes can be used to return error values. This is important
when using hardware accelerators.
2017-06-28 12:52:16 +01:00
Andres Amaya Garcia bee0635b15 Add int return values to MD4 function calls
The following function calls are being deprecated to introduce int
return values.
    * mbedtls_md4()
    * mbedtls_md4_starts()
    * mbedtls_md4_update()
    * mbedtls_md4_finish()
    * mbedtls_md4_process()
The return codes can be used to return error values. This is important
when using hardware accelerators.
2017-06-28 12:52:16 +01:00
Andres Amaya Garcia 1d85213602 Add int return values to MD2 function calls
The following function calls are being deprecated to introduce int
return values.
    * mbedtls_md2()
    * mbedtls_md2_starts()
    * mbedtls_md2_update()
    * mbedtls_md2_finish()
    * mbedtls_md2_process()
The return codes can be used to return error values. This is important
when using hardware accelerators.
2017-06-28 12:52:15 +01:00
Andres Amaya Garcia 034ea7e754 Add int return values to SHA1 function calls
The following function calls are being deprecated to introduce int
return values.
    * mbedtls_sha1()
    * mbedtls_sha1_starts()
    * mbedtls_sha1_update()
    * mbedtls_sha1_finish()
    * mbedtls_sha1_process()
The return codes can be used to return error values. This is important
when using hardware accelerators.
2017-06-28 12:52:15 +01:00
Andres Amaya Garcia 4e2c07c6e1 Zeroize tmp buf in ctr_drbg_write_seed_file() 2017-06-27 16:57:26 +01:00
Andres Amaya Garcia 53c77cccc9 Initialise pointers to avoid IAR compiler warnings 2017-06-27 16:15:06 +01:00
Hanno Becker 83c9f495ff Prevent bounds check bypass through overflow in PSK identity parsing
The check `if( *p + n > end )` in `ssl_parse_client_psk_identity` is
unsafe because `*p + n` might overflow, thus bypassing the check. As
`n` is a user-specified value up to 65K, this is relevant if the
library happens to be located in the last 65K of virtual memory.

This commit replaces the check by a safe version.
2017-06-26 14:09:55 +01:00
Andres Amaya Garcia 03d70504ca Zeroize heap buf on failure in pem.c 2017-06-26 11:44:54 +01:00
Andres Amaya Garcia a00498819f Zeroize old psk buf when changing value in ssl_tls 2017-06-26 11:35:17 +01:00
Andres Amaya Garcia 7351e12410 Zeroize tmp buf in mbedtls_mpi_fill_random() 2017-06-26 11:20:02 +01:00
Andres Amaya Garcia 79a2e7ef06 Zeroize return buf on failure in platform.c 2017-06-26 11:10:22 +01:00
Andres Amaya Garcia 13f41e1c20 Zeroize tmp bufs in ctr_drbg.c functions 2017-06-26 11:04:35 +01:00
Andres Amaya Garcia 1f2666f9ec Zeroize return buf on failure in pkparse.c 2017-06-26 10:36:20 +01:00
Andres Amaya Garcia 3fee7593a9 Zeroize tmp bufs in hmac_drbg.c functions 2017-06-26 10:22:24 +01:00
Andres Amaya Garcia 1adcd95a25 Zeroize tmp bufs in entropy.c functions 2017-06-26 09:58:59 +01:00
Andres Amaya Garcia eb132b655c Zeroize tmp buf in mbedtls_md_file() md.c 2017-06-23 16:30:31 +01:00
Andres Amaya Garcia bdbca7b383 Zeroize tmp buf on fail in load_file() dhm.c 2017-06-23 16:23:21 +01:00
Simon Butcher f2a597fa3d Update the version number to 2.5.1 2017-06-20 23:08:10 +01:00
Andres Amaya Garcia d3e7e7d83f Add comment for skipped AES-192 test condition 2017-06-15 16:17:46 +01:00
Andres Amaya Garcia 2a078da134 Run AES-GCM-192 selftest if available only
This patch modifies the function mbedtls_gcm_self_test() function to
ensure that AES-GCM-192 tests are only run if the key size is supported
by the available implementation. This is useful when using
MBEDTLS_AES_ALT as some hardware crypto accelerators might not support
AES-192.
2017-06-15 11:45:23 +01:00
Andres Amaya Garcia 58f98c23d5 Run AES-192 selftest if available only
This patch modifies the function mbedtls_aes_selftest() function to
ensure that AES-192 tests are only run if the key size is supported by
the available implementation. This is useful when using MBEDTLS_AES_ALT
as some hardware crypto accelerators might not support AES-192.
2017-06-14 16:19:42 +01:00
Andres Amaya Garcia fd48739461 Add AES feature unavailable error code 2017-06-14 16:19:12 +01:00
Manuel Pégourié-Gonnard 4a42f3c405 Merge remote-tracking branch 'restricted/iotssl-1398' into development-restricted
* restricted/iotssl-1398:
  Add ChangeLog entry
  Ensure application data records are not kept when fully processed
  Add hard assertion to mbedtls_ssl_read_record_layer
  Fix mbedtls_ssl_read
  Simplify retaining of messages for future processing
2017-06-09 15:02:40 +02:00
Hanno Becker bdf3905fff Ensure application data records are not kept when fully processed
This commit fixes the following case: If a client is both expecting a
SERVER_HELLO and has an application data record that's partially
processed in flight (that's the situation the client gets into after
receiving a ServerHelloRequest followed by ApplicationData), a
subsequent call to mbedtls_ssl_read will set keep_current_message = 1
when seeing the unexpected application data, but not reset it to 0
after the application data has been processed. This commit fixes this.

It also documents and suggests how the problem might be solved in a
more structural way on the long run.
2017-06-09 10:42:03 +01:00
Manuel Pégourié-Gonnard b86b143030 Merge remote-tracking branch 'restricted/iotssl-1138-rsa-padding-check-restricted' into development-restricted
* restricted/iotssl-1138-rsa-padding-check-restricted:
  RSA PKCS1v1.5 verification: check padding length
2017-06-08 20:31:06 +02:00
Manuel Pégourié-Gonnard a0bf6ecfc3 Merge remote-tracking branch 'restricted/IOTSSL-1366/development-restricted' into development-restricted
* restricted/IOTSSL-1366/development-restricted:
  More length checks in RSA PKCS1v15 verify
  More length checks in RSA PKCS1v15 verify
2017-06-08 20:24:29 +02:00
Manuel Pégourié-Gonnard db108ac944 Merge remote-tracking branch 'hanno/mpi_read_file_underflow' into development
* hanno/mpi_read_file_underflow:
  Fix potential stack underflow in mpi_read_file.
2017-06-08 19:48:03 +02:00
Manuel Pégourié-Gonnard 1178ac5e77 Merge remote-tracking branch 'hanno/sliding_exponentiation' into development
* hanno/sliding_exponentiation:
  Adapt ChangeLog
  Abort modular inversion when modulus is one.
  Correct sign in modular exponentiation algorithm.
2017-06-08 19:46:30 +02:00
Hanno Becker bb9dd0c044 Add hard assertion to mbedtls_ssl_read_record_layer
This commit adds a hard assertion to mbedtls_ssl_read_record_layer
triggering if both ssl->in_hslen and ssl->in_offt are not 0. This
should never happen, and if it does, there's no sensible way of
telling whether the previous message was a handshake or an application
data message.
2017-06-08 11:55:34 +01:00
Hanno Becker 4a810fba69 Fix mbedtls_ssl_read
Don't fetch a new record in mbedtls_ssl_read_record_layer as long as an application data record is being processed.
2017-06-08 10:12:16 +01:00
Hanno Becker af0665d8b0 Simplify retaining of messages for future processing
There are situations in which it is not clear what message to expect
next. For example, the message following the ServerHello might be
either a Certificate, a ServerKeyExchange or a CertificateRequest. We
deal with this situation in the following way: Initially, the message
processing function for one of the allowed message types is called,
which fetches and decodes a new message. If that message is not the
expected one, the function returns successfully (instead of throwing
an error as usual for unexpected messages), and the handshake
continues to the processing function for the next possible message. To
not have this function fetch a new message, a flag in the SSL context
structure is used to indicate that the last message was retained for
further processing, and if that's set, the following processing
function will not fetch a new record.

This commit simplifies the usage of this message-retaining parameter
by doing the check within the record-fetching routine instead of the
specific message-processing routines. The code gets cleaner this way
and allows retaining messages to be used in other situations as well
without much effort. This will be used in the next commits.
2017-06-08 10:12:16 +01:00
Hanno Becker e6706e62d8 Add tests for missing CA chains and bad curves.
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.
2017-06-07 11:26:59 +01:00
Hanno Becker 39ae8cd207 Fix implementation of VERIFY_OPTIONAL verification mode
This commit changes the behaviour of mbedtls_ssl_parse_certificate
to make the two authentication modes MBEDTLS_SSL_VERIFY_REQUIRED and
MBEDTLS_SSL_VERIFY_OPTIONAL be in the following relationship:

    Mode == MBEDTLS_SSL_VERIFY_REQUIRED
<=> Mode == MBEDTLS_SSL_VERIFY_OPTIONAL + check verify result

Also, it changes the behaviour to perform the certificate chain
verification even if the trusted CA chain is empty. Previously, the
function failed in this case, even when using optional verification,
which was brought up in #864.
2017-06-07 11:13:19 +01:00
Manuel Pégourié-Gonnard ddc6e52cc1 Merge remote-tracking branch 'gilles/iotssl-1223/development' into development
* gilles/iotssl-1223/development:
  Fix FALLBACK_SCSV parsing
2017-06-06 20:11:36 +02:00
Manuel Pégourié-Gonnard 383a118338 Merge remote-tracking branch 'gilles/IOTSSL-1330/development' into development
* gilles/IOTSSL-1330/development:
  Changelog entry for the bug fixes
  SSLv3: when refusing renegotiation, stop processing
  Ignore failures when sending fatal alerts
  Cleaned up double variable declaration
  Code portability fix
  Added changelog entry
  Send TLS alerts in many more cases
  Skip all non-executables in run-test-suites.pl
  SSL tests: server requires auth, client has no certificate
  Balanced braces across preprocessor conditionals
  Support setting the ports on the command line
2017-06-06 19:22:41 +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 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 750c353c5c X.509 self-tests: replaced SHA-1 certificates by SHA-256 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
Andres AG 51a7ae1353 Add missing ret code checks in PEM module
Add missing return code checks in the functions pem_des_decrypt(),
pem_3des_decrypt() and pem_aes_decrypt() so that the calling function
mbedtls_pem_read_buffer() is notified of errors reported by the crypto
primitives AES, DES and 3DES.
2017-05-30 16:40:36 +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
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
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
Janos Follath 6e876988de Fix bug in threading sample implementation #667 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 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
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
Janos Follath 6c8ccd5be4 Fix cleanup label alignment 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 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
Janos Follath 430d3376c9 Add thread safety to ECP hardware acceleration
The intended use of the abstraction layer for Elliptic Curve Point
arithmetic is to enable using hardware cryptographic accelerators.
These devices are a shared resource and the driver code rarely provides
thread safety.

This commit adds mutexes to the abstraction layer to protect the device
in a multi-threaded environment.
2017-05-11 22:42:14 +01:00
Janos Follath 552f6b6d17 Add global mutex for asymmetric crypto accelerator
The primary use case behind providing an abstraction layer to enable
alternative Elliptic Curve Point arithmetic implementation, is making
use of cryptographic acceleration hardware if it is present.

To provide thread safety for the hardware accelerator we need a mutex
to guard it.
2017-05-11 22:42:14 +01:00
Janos Follath 16e63ea2e2 Fix alternative ECP function names
The alternative Elliptic Curve Point arithmetic functions didn't have
an 'mbedtls_' prefix as required by check-names.sh.
2017-05-11 22:42:14 +01:00
Janos Follath 4d9c69dde8 Fix ECP alternative macro names
The compile time macros enabling the initialisation and deinitialisation
in the alternative Elliptic Curve Point arithmetic implementation had
names that did not end with '_ALT' as required by check-names.sh.
2017-05-11 22:42:14 +01:00