Create internal functions for HMAC operations. This prepares for two
things: separating crypto-sensitive code from argument decoding and
validation, and using HMAC for other purposes than a MAC inside the
library (e.g. HMAC_DRBG, HKDF).
No intended observable behavior change in this commit.
Although RSASSA-PSS defines its input as a message to be hashed, we
implement a sign-the-hash function. This function can take an input
which isn't a hash, so don't restrict the size of the input, any more
than Mbed TLS does.
Remove a redundant check that hash_length fits in unsigned int for the
sake of Mbed TLS RSA functions.
Test that PSS accepts inputs of various lengths. For PKCS#1 v1.5
signature in raw mode, test the maximum input length.
This is the most common mode and the only mode that Mbed TLS functions
fully supports (mbedtls_rsa_rsassa_pss_verify_ext can verify
signatures with a different salt length).
This required tweaking exercise_signature_key to use a payload size
for the signature based on the algorithm, since our implementation of
PSS requires that the input size matches the hash size. This would
also be the case for PKCS#1 v1.5 with a specified hash.
Explicitly state that calling abort is safe after initializing to
zero.
Explicitly state that calling abort on an inactive operation is safe,
and replace "active" by "initialized" in the description of the
parameter.
Get rid of the recommendation for implementers to try to handle
uninitialized structures safely. It's good advice in principle but
cannot be achieved in a robust way and the wording was confusing.
* No test depends on MBEDTLS_PK_C except via MBEDTLS_PK_PARSE_C, so
remove MBEDTLS_PK_C and keep only MBEDTLS_PK_PARSE_C.
* Add MBEDTLS_PK_WRITE_C for pk export tests.
* Add MBEDTLS_GENPRIME for RSA key generation tests.
* Add dependencies to AEAD tests.
* Add missing dependencies to many RSA tests.
We failed check-names.sh due to using a define which wasn't described or
defined anywhere. Even though we won't realistically enable
MBEDTLS_PSA_CRYPTO_SPM via the configuration system (and will do it from
PSA Crypto SPM tooling instead), add a description of the configuration to
config.h as good practice. Exclude MBEDTLS_PSA_CRYPTO_SPM from the "full"
configuration as well.
* Add a test for decryption with invalid padding.
* Add a test for encryption with input too large.
* In negative tests, pass input whose length matches the key length,
unless that's what the test is about.
We failed all.sh on the "test: doxygen markup outside doxygen blocks" due
to doxygen markup being outside a Doxygen block. Add an extra `*` to the
psa_get_key_from_slot comment to denote the comment as a Doxygen comment.
Make function names for multipart operations more consistent (cipher
edition).
Rename symmetric cipher multipart operation functions so that they all
start with psa_cipher_:
* psa_encrypt_setup -> psa_cipher_encrypt_setup
* psa_decrypt_setup -> psa_cipher_decrypt_setup
* psa_encrypt_set_iv -> psa_cipher_set_iv
* psa_encrypt_generate_iv -> psa_cipher_generate_iv
Use if-else-if chains rather than switch because many blocks apply to
a class of algoritmhs rather than a single algorithm or a fixed set
of algorithms.
Call abort on more error paths that were missed earlier.
Change most asymmetric_verify to use public keys (they were all using
key pairs before). Keep one test with an RSA key pair and one with an
EC key pair.
Add tests of key policy checks for MAC, cipher, AEAD, asymmetric
encryption and asymmetric signature. For each category, test
with/without the requisite usage flag in each direction, and test
algorithm mismatch.
At this point it fixes memory leaks as well. These memory leaks are the
fault of the 'psa_cipher_finish()' function and the calls fixed in this
commit (among with many others in the test suite) will become obsolete
after fixing 'psa_cipher_finish()'.
Reorganize error handling code in psa_mac_finish_internal,
psa_mac_sign_finish and psa_mac_verify finish to ensure that:
* psa_mac_abort() is always called, on all success and error paths.
* psa_mac_finish places a safe value in the output parameters on
all error paths, even if abort fails.
Revise the test function asymmetric_encrypt_fail into
asymmetric_encrypt and use it for positive tests as well. Get the
expected output length from PSA_ASYMMETRIC_ENCRYPT_OUTPUT_SIZE. Check
the actual output length against test data.
Add positive test cases for encryption: one with an RSA public
key (this is the only test for encryption with a public key rather
than a key pair) and one with a key pair.
Add required includes in tests and psa_crypto.c file in order to be able to compilef for the SPM solution.
Some functions needed to be deprecated from psa_crypto.c since they already implemented in the SPM.
In mbedtls_rsa_rsaes_oaep_encrypt and
mbedtls_rsa_rsaes_pkcs1_v15_encrypt, if the input length is 0 (which
is unusual and mostly useless, but permitted) then it is fine for the
input pointer to be NULL. Don't return an error in this case.
When `input` is NULL, `memcpy( p, input, ilen )` has undefined
behavior even if `ilen` is zero. So skip the `memcpy` call in this
case. Likewise, in `mbedtls_rsa_rsaes_oaep_decrypt` and
`mbedtls_rsa_rsaes_pkcs1_v15_decrypt`, skip the `memcpy` call if
`*olen` is zero.
Make function names for multipart operations more consistent (MAC
setup edition).
Split psa_mac_setup into two functions psa_mac_sign_setup and
psa_mac_verify_setup. These functions behave identically except that
they require different usage flags on the key. The goal of the split
is to enforce the key policy during setup rather than at the end of
the operation (which was a bit of a hack).
In psa_mac_sign_finish and psa_mac_verify_finish, if the operation is
of the wrong type, abort the operation before returning BAD_STATE.
