Make psa_export_key() always set a valid data_length when exporting,
even when there are errors. This makes the API easier to use for buggy
programs (like our test code).
Our test code previously used exported_length uninitialized when
checking to see that the buffer returned was all zero in import_export()
in the case where an error was returned from psa_export_key().
Initialize exported_length to an invalid length, and check that it gets
set properly by psa_export_key(), to avoid this using export_length
uninitialized. Note that the mem_is_zero() check is still valid when
psa_export_key() returns an error, e.g. where exported_length is 0, as
we want to check that nothing was written to the buffer on error.
Out test code also previous passed NULL for the data_length parameter of
psa_export_key() when it expected a failure (in key_policy_fail()).
However, data_length is not allowed to be NULL, especially now that we
write to data_length from psa_export_key() even when there are errors.
Update the test code to not pass in a NULL data_length.
psa_hash_abort, psa_mac_abort and psa_cipher_abort now return
PSA_ERROR_BAD_STATE if operation->alg is obviously not valid, which
can only happen due to a programming error in the caller or in the
library. We can't detect all cases of calling abort on uninitialized
memory but this is dirt cheap and better than nothing.
It isn't used to define other macros and it doesn't seem that useful
for users. Remove it, we can reintroduce it if needed.
Define a similar function key_type_is_raw_bytes in the implementation
with a clear semantics: it's a key that's represented as a struct
raw_data.
In the test generate_random, focus on testing that psa_generate_random
is writing all the bytes of the output buffer and no more. Add a check
that it is writing to each byte of the output buffer. Do not try to
look for repeating output as the structure of a unit test isn't likely
to catch that sort of problem anyway.
Also add what was missing in the test suite to support block ciphers
with a block size that isn't 16.
Fix some buggy test data that passed only due to problems with DES
support in the product.
In psa_hash_start, psa_mac_start and psa_cipher_setup, return
PSA_ERROR_INVALID_ARGUMENT rather than PSA_ERROR_NOT_SUPPORTED when
the algorithm parameter is not the right category.
When psa_mac_start(), psa_encrypt_setup() or psa_cipher_setup()
failed, depending on when the failure happened, it was possible that
psa_mac_abort() or psa_cipher_abort() would crash because it would try
to call a free() function uninitialized data in the operation
structure. Refactor the functions so that they initialize the
operation structure before doing anything else.
Add non-regression tests and a few more positive and negative unit
tests for psa_mac_start() and psa_cipher_setup() (the latter via
psa_encrypt_setip()).
In some configurations (like config-mini-tls1_1.h), size is unused. This
leads to failures when building with CMake Asan, because that build
doesn't use "-Wno-unused-value".
Fixes: e01822299624 ("New function mbedtls_rsa_get_bitlen")
In psa_export_key, ensure that each byte of the output buffer either
contains its original value, is zero, or is part of the actual output.
Specifically, don't risk having partial output on error, and don't
leave extra data at the end of the buffer when exporting an asymmetric
key.
Test that exporting to a previously zeroed buffer leaves the buffer
zeroed outside the actual output if any.
Switch the default config.h back to the upstream version, plus the new
feature from this branch MBEDTLS_PSA_CRYPTO_C, plus MBEDTLS_CMAC_C
because it's a features we're using to explore the API design but
that's off by default in Mbed TLS.
Having a crypto-only version saved a bit of developer time, and it's
something we want to ship, but we also need a full build with TLS to
work, and the CI scripts assume that the default build includes TLS.
As a consequence, list-macros.sh no longer needs a special case to
pass check-names.sh.
Exporting an asymmetric key only worked if the target buffer had
exactly the right size, because psa_export_key uses
mbedtls_pk_write_key_der or mbedtls_pk_write_pubkey_der and these
functions write to the end of the buffer, which psa_export_key did not
correct for. Fix this by moving the data to the beginning of the
buffer if necessary.
Add non-regression tests.
The default config.h omits non-crypto features. Remove some features
that had been accidentally left in but have dependencies that had been
removed.
Also update configs/config-psa-crypto.h to match
include/mbedtls/config.h. They were historically identical but started
diverging when the feature-psa branch was rebased on top of a more
recent upstream.
Now the code builds with the "full" config.
When calling psa_generate_key, pass the size of the parameters buffer
explicitly. This makes calls more verbose but less error-prone. This
also has the benefit that in an implementation with separation, the
frontend knows how many bytes to send to the backend without needing
to know about each key type.
* init-deinit
* import-export
* policies
* lifetime
* hash
* MAC
* cipher
* AEAD
* asymmetric sign
* asymmetric verify
* asymmetric encrypt-decrypt
This commit only moves test functions and test cases around. It does
not modify, add or remove tests.
psa_import_key must check that the imported key data matches the
expected key type. Implement the missing check for EC keys that the
curve is the expected one.
Instead of rolling our own list of elliptic curve identifiers, use one
from somewhere. Pick TLS because it's the right size (16 bits) and
it's as good as any.
Get rid of many redundant casts. In particular, it is not useful to
cast uint32_t values to size_t before performing arithmetic or
comparisons on them.
Rewrap a number of function calls, many of which now have narrower
arguments thanks to the removed casts. When a function call doesn't
fit on a single line, avoid grouping unrelated parameters together,
but do try to group a buffer pointer and the associated size.
Define more auxiliary variables xxx of a particular integer
type (psa_algorithm_t, psa_key_usage_t, etc.) corresponding to a test
function xxx_arg which has the type int. This avoids the need to cast
xxx_arg to an unsigned type sometimes in the code.
Avoid lines longer than 80 columns.
Remove some redundant parentheses, e.g. change
if( ( a == b ) && ( c == d ) )
to
if( a == b && c == d )
which makes lines less long and makes the remaining parentheses more
relevant.
Add missing parentheses around return statements.
There should be no semantic change in this commit.
