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Fix intermittent test failure

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Ecp key data length should not be measured by mbedtls_mpi_size(), as
this does not count leading zeros, which are still part of the key. This
resulted intermittently in the code attempting to import a wrongly sized
key as the first byte was all zero.

Signed-off-by: Paul Elliott <paul.elliott@arm.com>
This commit is contained in:
Paul Elliott 2024-10-11 14:50:34 +01:00 committed by Waleed Elmelegy
parent 30437e6408
commit 7164dc52ce
1 changed files with 1 additions and 1 deletions
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2
tf-psa-crypto/drivers/builtin/src/psa_crypto_ecp.c
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@ -634,7 +634,7 @@ psa_status_t mbedtls_psa_generate_key_complete(
operation->num_ops = 1;
*key_len = mbedtls_mpi_size(&operation->ecp.d);
*key_len = operation->ecp.d.n * sizeof(mbedtls_mpi_uint);
if (*key_len > key_output_size) {
return PSA_ERROR_BUFFER_TOO_SMALL;
}