Commit graph

8126 commits

Author SHA1 Message Date
Hanno Becker 198611db32 Add missing return value check in ECDSA test suite
The test case `ecdsa_det_test_vectors` from the ECDSA test suite
called `mbedtls_md()` without checking its return value.
2018-10-17 13:58:19 +01:00
Hanno Becker 0fbbc64fee Add dependency of mbedtls_asn1_write_len() test on ASN.1 parsing 2018-10-16 13:48:23 +01:00
Hanno Becker 19d858e8e6 Add dependency of pkwrite test suite on pkparse module 2018-10-16 13:46:25 +01:00
Hanno Becker b14c331eb9 Add dependency of key_app_writer example program on PK parse module 2018-10-16 13:45:22 +01:00
Hanno Becker 44da18a294 Duplicate mbedtls_asn1_find_named_data in asn1write.c to avoid dep.
This commit duplicates the public function mbedtls_asn1_find_named_data()
defined in library/asn1parse.c within library/asn1write.c in order to
avoid a dependency of the ASN.1 writing module on the ASN.1 parsing module.

The duplication is unproblematic from a semantic and an efficiency
perspective becasue it is just a short list traversal that doesn't
actually do any ASN.1 parsing.
2018-10-16 13:44:06 +01:00
Hanno Becker 1ea604d3ee Guard mbedtls_pkcs5_pbes2() by MBEDTLS_ASN1_PARSE_C
Previously, mbedtls_pkcs5_pbes2() was unconditionally declared
in `pkcs5.h` but defined as a stub returning
`MBEDTLS_ERR_PKCS5_FEATURE_UNAVAILABLE` in case
MBEDTLS_ASN1_PARSE_C was not defined.

In line with the previous commits, this commit removes declaration
and definition from both `pkcs5.h` and `pkcs5.c` in case
MBEDTLS_ASN1_PARSE_C is not defined.
2018-10-16 13:39:40 +01:00
Hanno Becker 8a89f9fcd2 Make PBE-related parts of PKCS12 depend on MBEDTLS_ASN1_PARSE_C 2018-10-16 13:39:40 +01:00
Hanno Becker cb9debda6b Guard PK-parse module by ASN.1-parse module in check_config.h 2018-10-16 13:39:40 +01:00
Gilles Peskine 96f3b4ee42 Remove yotta support from check-files.py
Complements "Remove Yotta support from the docs, tests and build scripts".
2018-10-16 14:10:21 +02:00
Manuel Pégourié-Gonnard b25cb603bb Add a comment to clarify code flow 2018-10-16 11:48:09 +02:00
Manuel Pégourié-Gonnard a5a3e40c4e Fix missing dereference.
Went unnoticed because it was only on a defensive code path, in an internal
function, so not exercised.
2018-10-16 11:27:23 +02:00
Manuel Pégourié-Gonnard 7a28e99fa0 Expand test to ensure no assumption on output
The functions don't require the caller to preserve the content of the output
parameter - let's ensure that they don't assume that.
2018-10-16 11:22:45 +02:00
Manuel Pégourié-Gonnard 90f31b71a8 Improve readability by moving counter decrement
Avoid the slightly awkward rs_ctx-> i = i + 1
2018-10-16 10:45:24 +02:00
Manuel Pégourié-Gonnard a58e011ac0 Fix alignment in a macro definition 2018-10-16 10:42:47 +02:00
Manuel Pégourié-Gonnard b843b15a02 Fix function name to fit conventions 2018-10-16 10:41:31 +02:00
Manuel Pégourié-Gonnard c0edc96704 Add comment on internal function API 2018-10-16 10:38:19 +02:00
Manuel Pégourié-Gonnard d8b73f2312 Remove unnecessary calls to init() from free()
Our API makes no guarantee that you can use a context after free()ing it
without re-init()ing it first, so better not give the wrong impression that we
do, while it's not policy and the rest of the code might not allow it.
2018-10-16 10:34:13 +02:00
Manuel Pégourié-Gonnard c37423fa76 Fix misleading sub-state name and comments
The enum constant had 'ske' in its name while this was a sub-state of the
"write client key exchange" state; corresponding issue in the comment.
2018-10-16 10:28:17 +02:00
Ron Eldor 5267b62248 Change error description
1. Change error description to a clearer one.
2. Change value in the error codes ranges description.
2018-10-15 18:44:42 +03:00
Ron Eldor a27190b774 Rename platform error code and value
Rename the PLATFORM HW error, to avoid ABI breakage with Mbed OS.
The value changed as well, as previous value was not in the range of
Mbed TLS low level error codes.
2018-10-15 16:33:43 +03:00
Manuel Pégourié-Gonnard 25781f90da Fix missing check in example client
And a mis-indented check as well.
2018-10-15 15:28:16 +02:00
Manuel Pégourié-Gonnard ee68cff813 Fix or improve some comments (and whitespace) 2018-10-15 15:27:49 +02:00
Manuel Pégourié-Gonnard 32df91183e Fix documentation of what functions restart when
The previous comment in ecp.h that only functions that take a "restart
context" argument can restart was wrong due to ECDH and SSL functions.
Changing that criterion to "document says if can return IN PROGRESS".

This requires updating the documentation of the SSL functions to mention this
explicitly, but it's something we really ought to do anyway, a bit
embarrassing that this wasn't done already - callers need to know what
`MBEDTLS_ERR_SSL_xxx` error codes to special-case. Note that the documentation
of the relevant functions was in a suboptimal state, so it was improved in the
process - it could use some more improvement, but only the changes that helped
cleanly insert the info about the IN_PROGRESS part were done here.

Also, while updating the ecp.h comment, I noticed several functions in the
ECDH module were wrongfully documented as restartable, which is probably a
left-over from the days before `mbedtls_ecdh_enable_restart()` was introduced.
Fixing that as well, to make the criterion used in ecp.h correct.
2018-10-15 14:41:16 +02:00
Hanno Becker 7e1f3bedd9 Adapt ChangeLog 2018-10-15 13:20:28 +01:00
Manuel Pégourié-Gonnard f0bbd7e3fd Misc documentation fixes/improvements. 2018-10-15 13:22:41 +02:00
Manuel Pégourié-Gonnard 6346a75dfb Merge branch 'development' into iotssl-1260-non-blocking-ecc-restricted
* development:
  ssl-opt.sh: change expected output for large srv packet test with SSLv3
  Adapt ChangeLog
  Fix bug in SSL ticket implementation removing keys of age < 1s
  ssl-opt.sh: Add DTLS session resumption tests
  Add ChangeLog entry
  Fix typo
  Fix hmac_drbg failure in benchmark, with threading
  Remove trailing whitespace
  Remove trailing whitespace
  ssl_server2: add buffer overhead for a termination character
  Add missing large and small packet tests for ssl_server2
  Added buffer_size and response_size options for ssl-server2. Added appropriate tests.

Solving a conflict in tests/ssl-opt.sh: two set of tests were added at the
same place (just after large packets):
- restartable ECC tests (in this branch)
- server-side large packets (in development)

Resolution was to move the ECC tests after the newly added server large packet
ones.
2018-10-15 11:26:17 +02:00
Gilles Peskine 4899247bf2 Fix undefined behavior in unsigned-to-signed conversion
The code assumed that `int x = - (unsigned) u` with 0 <= u < INT_MAX
sets `x` to the negative of u, but actually this calculates
(UINT_MAX - u) and then converts this value to int, which overflows.
Cast to int before applying the unary minus operator to guarantee the
desired behavior.
2018-10-12 20:32:55 +02:00
Gilles Peskine 9b430704d1 Fix likely-harmless undefined behavior surrounding volatile
The code was making two unsequenced reads from volatile locations.
This is undefined behavior. It was probably harmless because we didn't
care in what order the reads happened and the reads were from ordinary
memory, but UB is UB and IAR8 complained.
2018-10-12 20:32:52 +02:00
Hanno Becker 0b44d5cc79 Zeroize sensitive data in aescrypt2 and crypt_and_hash examples
This commit replaces multiple `memset()` calls in the example
programs aes/aescrypt2.c and aes/crypt_and_hash.c by calls to
the reliable zeroization function `mbedtls_zeroize()`.

While not a security issue because the code is in the example
programs, it's bad practice and should be fixed.
2018-10-12 16:54:29 +01:00
Hanno Becker 805f2e11bd Add missing zeroization of buffered handshake messages
This commit ensures that buffers holding fragmented or
future handshake messages get zeroized before they are
freed when the respective handshake message is no longer
needed. Previously, the handshake message content would
leak on the heap.
2018-10-12 16:50:37 +01:00
Andrzej Kurek 9580528248 ssl-opt.sh: fix typo in mtu settings 2018-10-11 08:55:37 -04:00
Andrzej Kurek b459346f67 ssl-opt.sh: add a check for i686 targets
Run DTLS fragmenting tests on non-i686 targets only.
Remove reduntant gnutls requirements.
2018-10-11 08:43:30 -04:00
Andrzej Kurek 7782605491 ssl-opt.sh: add comments regarding ciphersuite forcing 2018-10-11 07:34:08 -04:00
Andrzej Kurek 748face36f ssl_tls: fix maximum output length
set maximum output length to MBEDTLS_SSL_OUT_CONTENT_LEN instead of
MBEDTLS_SSL_MAX_CONTENT_LEN.
2018-10-11 07:20:19 -04:00
Andrzej Kurek 7c6df832ed ssl-opt.sh: revert unnecessary "autoreduction" checks
return to the initial check for "resend"
2018-10-11 07:06:12 -04:00
Andrzej Kurek 7311c78074 ssl-opt.sh: force ciphersuites to reduce mtu size 2018-10-11 06:49:41 -04:00
Hanno Becker 780f0a4cc1 Reinitialize PK ctx in mbedtls_pk_parse_key before reuse are free
Context: This commit makes a change to mbedtls_pk_parse_key() which
is responsible for parsing of private keys. The function doesn't know
the key format in advance (PEM vs. DER, encrypted vs. unencrypted) and
tries them one by one, resetting the PK context in between.

Issue: The previous code resets the PK context through a call to
mbedtls_pk_free() along, lacking the accompanying mbedtls_pk_init()
call. Practically, this is not an issue because functionally
mbedtls_pk_free() + mbedtls_pk_init() is equivalent to mbedtls_pk_free()
with the current implementation of these functions, but strictly
speaking it's nonetheless a violation of the API semantics according
to which xxx_free() functions leave a context in uninitialized state.
(yet not entirely random, because xxx_free() functions must be idempotent,
so they cannot just fill the context they operate on with garbage).

Change: The commit adds calls to mbedtls_pk_init() after those calls
to mbedtls_pk_free() within mbedtls_pk_parse_key() after which the
PK context might still be used.
2018-10-11 11:31:15 +01:00
Hanno Becker cfa2e33fd2 Omit runtime configuration of calloc/free if macro config enabled
This commit removes the definition of the API function

`mbedtls_platform_set_calloc_free()`

from `library/platform.c` in case the macros

`MBEDTLS_PLATFORM_CALLOC_MACRO`
`MBEDTLS_PLATFORM_FREE_MACRO`

for compile time configuration of calloc/free are set.

This is in line with the corresponding header `mbedtls/platform.h`
which declares `mbedtls_platform_set_calloc_free()` only if
`MBEDTLS_PLATFORM_{CALLOC/FREE}_MACRO` are not defined.

Fixes #1642.
2018-10-11 11:04:20 +01:00
Hanno Becker e5fecec7bf Add test for MBEDTLS_PLATFORM_{CALLOC/FREE}_MACRO to all.sh
This commit adds a test to tests/scripts/all.sh exercising an
ASan build of the default configuration with

MBEDTLS_PLATFORM_MEMORY enabled,
MBEDTLS_PLATFORM_CALLOC_MACRO set to std calloc
MBEDTLS_PLATFORM_FREE_MACRO   set to std free

(This should functionally be indistinguishable from a default build)
2018-10-11 11:04:20 +01:00
Hanno Becker 8df10232cf Add explicit unsigned-to-signed integer conversion
The previous code triggered a compiler warning because of a comparison
of a signed and an unsigned integer.

The conversion is safe because `len` is representable by 16-bits,
hence smaller than the maximum integer.
2018-10-10 15:48:39 +01:00
Darryl Green ac2ead0e68 Improve deterministic test for prime testing
Extend the mbedtls_mpi_is_prime_det test to check that it reports
the number as prime when testing rounds-1 rounds, then reports the
number as composite when testing the full number of rounds.
2018-10-09 16:36:53 +01:00
Darryl Green e3f95ed25b Fix bias in random number generation in Miller-Rabin test
When a random number is generated for the Miller-Rabin primality test,
if the bit length of the random number is larger than the number being
tested, the random number is shifted right to have the same bit length.
This introduces bias, as the random number is now guaranteed to be
larger than 2^(bit length-1).

Changing this to instead zero all bits higher than the tested numbers
bit length will remove this bias and keep the random number being
uniformly generated.
2018-10-09 16:36:53 +01:00
Janos Follath e0e7ddf99e Changelog: Add entry for prime validation fix 2018-10-09 16:36:53 +01:00
Janos Follath a0b67c2f3e Bignum: Deprecate mbedtls_mpi_is_prime()
When using a primality testing function the tolerable error rate depends
on the scheme in question, the required security strength and wether it
is used for key generation or parameter validation. To support all use
cases we need more flexibility than what the old API provides.
2018-10-09 16:36:53 +01:00
Janos Follath da31fa137a Bignum: Fix prime validation vulnerability
The input distribution to primality testing functions is completely
different when used for generating primes and when for validating
primes. The constants used in the library are geared towards the prime
generation use case and are weak when used for validation. (Maliciously
constructed composite numbers can pass the test with high probability)

The mbedtls_mpi_is_prime() function is in the public API and although it
is not documented, it is reasonable to assume that the primary use case
is validating primes. The RSA module too uses it for validating key
material.
2018-10-09 16:36:53 +01:00
Janos Follath 64eca05ec2 Bignum: Add tests for primality testing
Primality tests have to deal with different distribution when generating
primes and when validating primes.
These new tests are testing if mbedtls_mpi_is_prime() is working
properly in the latter setting.

The new tests involve pseudoprimes with maximum number of
non-witnesses. The non-witnesses were generated by printing them
from mpi_miller_rabin(). The pseudoprimes were generated by the
following function:

void gen_monier( mbedtls_mpi* res, int nbits )
{
    mbedtls_mpi p_2x_plus_1, p_4x_plus_1, x, tmp;

    mbedtls_mpi_init( &p_2x_plus_1 );
    mbedtls_mpi_init( &p_4x_plus_1 );
    mbedtls_mpi_init( &x ); mbedtls_mpi_init( &tmp );

    do
    {
        mbedtls_mpi_gen_prime( &p_2x_plus_1, nbits >> 1, 0,
                               rnd_std_rand, NULL );
        mbedtls_mpi_sub_int( &x, &p_2x_plus_1, 1 );
        mbedtls_mpi_div_int( &x, &tmp, &x, 2 );

        if( mbedtls_mpi_get_bit( &x, 0 ) == 0 )
            continue;

        mbedtls_mpi_mul_int( &p_4x_plus_1, &x, 4 );
        mbedtls_mpi_add_int( &p_4x_plus_1, &p_4x_plus_1, 1 );

        if( mbedtls_mpi_is_prime( &p_4x_plus_1, rnd_std_rand,
                                  NULL ) == 0 )
            break;

    } while( 1 );

    mbedtls_mpi_mul_mpi( res, &p_2x_plus_1, &p_4x_plus_1 );
}
2018-10-09 16:36:53 +01:00
Janos Follath b728c29114 Bignum: Remove dead code
Both variables affected by the code are overwritten before their next
read.
2018-10-09 16:33:27 +01:00
Janos Follath 3332937538 Changelog: Add entry for prime test improvement 2018-10-09 16:33:27 +01:00
Janos Follath b8fc1b02ee RSA: Use MBEDTLS_MPI_GEN_PRIME_FLAG_LOW_ERR 2018-10-09 16:33:27 +01:00
Janos Follath a3cb7eb8ad Bignum: Add test for improved prime generation 2018-10-09 16:33:27 +01:00