psa: Clear bits in mbedtls_ecc_group_to_psa()
Clear bits in mbedtls_ecc_group_to_psa() to avoid static analyzers and
possibly compilers from warning that bits may be used uninitialized in
certain code paths.
For example, if mbedtls_ecc_group_to_psa() were to be inlined in
crypto_extra.h, the following compiler warning is likely.
In file included from ../include/psa/crypto.h:3774:0,
from ../include/mbedtls/pk.h:49,
from pk.c:29:
pk.c: In function 'mbedtls_pk_wrap_as_opaque':
../include/psa/crypto_struct.h:460:33: error: 'bits' may be used uninitialized in this function [-Werror=maybe-uninitialized]
attributes->core.bits = (psa_key_bits_t) bits;
^~~~~~~~~~~~~~~~~~~~~
pk.c:608:12: note: 'bits' was declared here
size_t bits;
^~~~
Signed-off-by: Jaeden Amero <jaeden.amero@arm.com>
diff --git a/library/psa_crypto.c b/library/psa_crypto.c
index 733a2e4..0ac6290 100644
--- a/library/psa_crypto.c
+++ b/library/psa_crypto.c
@@ -420,6 +420,7 @@
*bits = 448;
return( PSA_ECC_CURVE_MONTGOMERY );
default:
+ *bits = 0;
return( 0 );
}
}