Due to repeated calls to PSA_AEAD_NONCE_LENGTH, which in turn calls
PSA_ALG_AEAD_WITH_DEFAULT_LENGTH_TAG several times, some macros updated
in this PR expanded to over 6000 characters, more than the 4095 that ISO
C99 compilers are guaranteed to support.
Signed-off-by: Bence Szépkúti <bence.szepkuti@arm.com>
Where a change was necessary, the new documentation was copied from the
PSA Crypto API spec exactly, with the exception of PSA_AEAD_TAG_LENGTH,
which needed some adjustment.
Signed-off-by: Bence Szépkúti <bence.szepkuti@arm.com>
Fix expected error code when importing a persistent key or
registering a key with an invalid key identifier:
PSA_ERROR_INVALID_ARGUMENT instead of PSA_ERROR_INVALID_HANDLE.
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
Implementers and users would have to refer to the RFC for the detailed
specification of the algorithm anyway.
Keep a mention of the curves and hashes involved for avoidance of doubt.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
The coordinates are over $F_{2^{255}-19}$, so by the general
definition of the bit size associated with the curve in the
specification, the value for size attribute of keys is 255.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
The size attribute of a key is expressed in bits, so use bits in the
documentation. (The documentation of psa_export_key() describes the
export format, so it counts in bytes.)
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Call it “SHAKE256-512”, just like SHA3-512 has 512 bits of output.
SHAKE256-64 looks like it's 64 bits of output, but this is 64 bytes.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Define algorithms for PureEdDSA and for HashEdDSA, the EdDSA variants
defined by RFC 8032.
The encoding for HashEdDSA needs to encode the hash algorithm so that
the hash can be calculated by passing PSA_ALG_SIGN_GET_HASH(sig_alg)
to psa_hash_compute() or psa_hash_setup(). As a consequence,
Ed25519ph (using SHA-512) and Ed448ph (using SHAKE256) need to have
different algorithm encodings (the key is enough to tell them apart,
but it is not known while hashing). Another consequence is that the
API needs to recognize the Ed448 prehash (64 bytes of SHAKE256 output)
as a hash algorithm.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Add an elliptic curve family for the twisted Edwards curves
Edwards25519 and Edwards448 ("Goldilocks"). As with Montgomery curves,
since these are the only two curves in common use, the family has a
generic name.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Remove cipher_generate_iv driver entry point as there
is no known use case to delegate this to a driver.
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
Move members that are of no use to the PSA crypto core
to the Mbed TLS implementation specific operation context.
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
For cipher multi-part operations, dispatch based on
the driver identifier even in the case of the
Mbed TLS software implementation (viewed as a driver).
Also use the driver identifier to check that an
cipher operation context is active or not.
This aligns the way hash and cipher multi-part
operations are dispatched.
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
Add missing PSA_WANT_CCM/GCM/CMAC. This completes
the set of PSA_WANT config options given the
current support of PSA crypto in Mbed TLS.
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
