Move the obfuscation of the internal library only returning a delta of ops done
into the driver wrapper, thus meaning driver wrapper and API call both return
absolute values of work done. Document the differences at the internal
implementation level.
Signed-off-by: Paul Elliott <paul.elliott@arm.com>
If an error occurs, calling any function on the same operation should return
PSA_ERROR_BAD_STATE, and we were not honouring that for all errors. Add extra
failure tests to try and ratify this.
Signed-off-by: Paul Elliott <paul.elliott@arm.com>
For sign and verify, the pointer passed in to the hash is not guaranteed to
remain valid inbetween calls, thus we need to store the hash in the
operation. Added a test to ensure this is the case.
Signed-off-by: Paul Elliott <paul.elliott@arm.com>
Set the psa level global anyway, regardless of having a built in
implementation, to match the set function. Also, ensure that value returned
is the same as value passed in, irregardless of internal implementation
requirements.
Signed-off-by: Paul Elliott <paul.elliott@arm.com>
Ensure that num_ops is cleared when manual abort is called, but obviously not
when an operation just completes, and test this.
Signed-off-by: Paul Elliott <paul.elliott@arm.com>
Move to accumulate ops in context rather than attempting to read straight out
of structures due to structure ops getting reset per operation, and also
issues with _abort clearing internal data. Fix usage of size_t in structures
Signed-off-by: Paul Elliott <paul.elliott@arm.com>
Make public the versions of ECSDA sign and verify which return raw signatures
rather than returning ASN.1 encoded signatures, in order to use them for the
internal implemention of psa_sign/verify_hash_interruptible.
Signed-off-by: Paul Elliott <paul.elliott@arm.com>
Apply the usual parameter name and align the local variables and
comments. This naming diverges from the standard notation, but this is
beneficial as our variable meanings diverge as well and the difference
can help avoiding confusion.
Signed-off-by: Janos Follath <janos.follath@arm.com>
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
It is not necessary to save the middle limb upfront as overwriting it is
the desired result: in the first step we are reducing modulo
2^{512+biL}.
Arguably, the original flow is more intuitive and easier to see the idea
behind it.
Signed-off-by: Janos Follath <janos.follath@arm.com>
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
The prototype calculated with wrong limb size and not taken into account
the overflow in the shared limb.
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
OID subidentifiers are encoded as follow. For every byte:
* The top bit is 1 if there is another byte to come, 0 if this is the
last byte.
* The other 7 bits form 7 bits of the number. These groups of 7 are
concatenated together in big-endian order.
Overlong encodings are explicitly disallowed by the BER/DER/X690
specification. For example, the number 1 cannot be encoded as:
0x80 0x80 0x01
It must be encoded as:
0x01
Enforce this in Mbed TLS' OID DER-to-string parser.
Signed-off-by: David Horstmann <david.horstmann@arm.com>
Pacify Clang >=15 which complained:
```
include/psa/crypto.h:91:23: error: empty paragraph passed to '\retval' command [-Werror,-Wdocumentation]
* \retval #PSA_SUCCESS
~~~~~~~~~~~~~~~~~~~^
```
This commit performs the following systematic replacement:
```
perl -i -0777 -p -e 's/([\\@])(retval +\S+)\n(?! *\*? *([^\n \\*\/]|\\[cp]\b))/$1$2 ${1}emptydescription\n/g' $(git ls-files '*.[hc]' '*.function' '*.jinja')
```
i.e. add an `\emptydescription` argument to `\retval` commands (or
`@retval`, which we don't normally used) that are followed by a single word,
unless the next line looks like it contains text which would be the
description.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
The first 2 components of an OID are combined together into the same
subidentifier via the formula:
subidentifier = (component1 * 40) + component2
The current code extracts component1 and component2 using division and
modulo as one would expect. However, there is a subtlety in the
specification[1]:
>This packing of the first two object identifier components recognizes
>that only three values are allocated from the root node, and at most
>39 subsequent values from nodes reached by X = 0 and X = 1.
If the root node (component1) is 2, the subsequent node (component2)
may be greater than 38. For example, the following are real OIDs:
* 2.40.0.25, UPU standard S25
* 2.49.0.0.826.0, Met Office
* 2.999, Allocated example OID
This has 2 implications that the current parsing code does not take
account of:
1. The second component may be > 39, so (subidentifier % 40) is not
correct in all circumstances.
2. The first subidentifier (containing the first 2 components) may be
more than one byte long. Currently we assume it is just 1 byte.
Improve parsing code to deal with these cases correctly.
[1] Rec. ITU-T X.690 (02/2021), 8.19.4
Signed-off-by: David Horstmann <david.horstmann@arm.com>
IAR was warning that conditional execution could bypass initialisation of
variables, although those same variables were not used uninitialised.
Signed-off-by: Paul Elliott <paul.elliott@arm.com>
Since only a single hash algorithm is currenlty supported, this avoids
having to perform hashing more than once.
Signed-off-by: Demi Marie Obenour <demiobenour@gmail.com>
A CMS signature can have internal data, but mbedTLS does not support
verifying such signatures. Reject them during parsing.
Signed-off-by: Demi Marie Obenour <demiobenour@gmail.com>
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
Since only one content type (signed data) is supported, storing the
content type just wastes memory.
Signed-off-by: Demi Marie Obenour <demiobenour@gmail.com>
The lstrlenW() function isn't available to UWP apps, and isn't necessary, since
when given -1, WideCharToMultiByte() will process the terminating null character
itself (and the length returned by the function includes this character).
Resolves#2994
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
To better reflect what the code relies on, limit the headers that are
included when MBEDTLS_USE_PSA_CRYPTO is disabled. Also stop including
"pkwrite.h" when it is no longer needed.
Include "mbedlts/platform_util.h" unconditionally. It was only included for
RSA ALT but was also used for MBEDTLS_USE_PSA_CRYPTO (the code worked
because other headers include "mbedtls/platform_util.h").
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Under MBEDTLS_USE_PSA_CRYPTO, ecdsa_sign_wrap() was calling
mbedtls_pk_write_key_der() to write a private key in SEC1 format, only to
then extract the part that represents the private value which is what
psa_import_key() actually wants. Instead, call an mpi function to directly
get the private key in the desired format.
This slightly reduces the code size and stack usage, and removes a
dependency on pk_write.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Under MBEDTLS_USE_PSA_CRYPTO, ecdsa_verify_wrap() was calling
mbedtls_pk_write_pubkey() to write a public key in the form of a
subjectPublicKey, only to then extract the part that represents the EC
point which psa_import_key() actually wants. Instead, call an ecp
function to directly get the public key in the desired format (just the
point).
This slightly reduces the code size and stack usage, and removes a
dependency on pk_write.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Handshake should abort will illeagal parameter allert when
receiving early data extentions but the selected_identity
parsed from pre-share key isn't equal to 0.
Signed-off-by: Xiaokang Qian <xiaokang.qian@arm.com>
The contentInfo field of PKCS7 Signed Data structures can
optionally contain the content of the signature. Per RFC 2315
it can also contain any of the PKCS7 data types. Add test and
comments making it clear that the current implementation
only supports the DATA content type and the data must be empty.
Return codes should be clear whether content was invalid or
unsupported.
Identification and fix provided by:
- Demi Marie Obenour <demiobenour@gmail.com>
- Dave Rodgman <dave.rodgman@arm.com>
Signed-off-by: Nick Child <nick.child@ibm.com>
- ASN.1 parsing functions check that length don't exceed buffer bounds,
so checks `p + len > end` are redundant.
- If `p + len == end`, this is erroneous because we expect further fields,
which is automatically caught by the next ASN.1 parsing call.
Hence, the two branches handling `p + len >= end` in x509_get_other_name()
can be removed.
Further, zeroization of the `other_name` structure isn't necessary
because it's not confidential (and it's also not performed on other
error conditions in this function).
Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>
There were some areas where `end_signer` were being
used when it makes more sense to use `end_issuer_and_sn`,
as pointed out by demiobenour@gmail.com.
Signed-off-by: Nick Child <nick.child@ibm.com>
Several PKCS7 invalid ASN1 Tests were failing due to extra
data bytes or incorrect content lengths going unnoticed. Make
the parser aware of possible malformed ASN1 data.
Signed-off-by: Nick Child <nick.child@ibm.com>
Netscape Certificate Management System Administrator's Guide: Extension-Specific Policy Modules, Chapter 18: Extension-Specific Policy Modules, Netscape Certificate Type Extension Policy:
> The extension has no default value.
A bitstring with no flags set is still technically valid, as it will mean that the certificate has no designated purpose at the time of creation.
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
A parsed CSR struct (`mbedtls_x509_csr`) now includes some of the
X.509v3 extensions included in the CSR -- the key usage, Netscape
cert-type, and Subject Alternative Names.
Author: Jens Alfke <jens@couchbase.com>
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
The fix_quasi_reduction function changed to static so checking the
invalid arguments are not needed anymore.
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
Rename the function to 'fix_quasi_reduction' to better suite its functionality.
Also changed the name prefix to suite for the new module.
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
Ensure platforms that don't have an assembly implementation for
mbedtls_get_unaligned_volatile_uint32() don't experience a performance
regression.
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
This path updates the clean-up logic of to individually
free each of the the group's structure members
rather than invoke `mbedtls_ecp_group_free()`.
Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
This patch adjusts the logic, so that the method is included,
when the following components are enabled:
* MBEDTLS_ECP_DP_CURVE448_ENABLED
* MBEDTLS_ECP_DP_CURVE25519_ENABLED
* ECP_LOAD_GROUP
Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
This patch updates the method to not free the `grp->P`
and `grp->N` structure members.
The contents of `P` and `N` are stored in static memory at
`curve448_p/n` and `curve25519p/n` and no longer dynamically
allocated.
Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
This patch adds two embedded constants used by `ecp_use_curve448()`.
The method has been updated to read that into an mpi instead of
calculating it on the fly.
Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
This patch adds two embedded constants used by `ecp_use_curve25519()`.
The method has been updated to read that into an mpi instead of
calculating it on the fly.
Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
The key derivation algorithm PSA_ALG_TLS12_ECJPAKE_TO_PMS cannot be
used on a shared secret from a key agreement since its input must be
an ECC public key. Reject this properly.
This is tested by test_suite_psa_crypto_op_fail.generated.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
In some contexts, the output pointer may equal the first input
pointer, in which case copying is not only superfluous but results in
"Source and destination overlap in memcpy" errors from Valgrind (as I
observed in the context of ecp_double_jac) and a diagnostic message
from TrustInSoft Analyzer (as Pascal Cuoq reported in the context of
other ECP functions called by cert-app with a suitable certificate).
Signed-off-by: Aaron M. Ucko <ucko@ncbi.nlm.nih.gov>
