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psa: Define mbedtls_ecc_group_to_psa() inline

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On dual world platforms, we want to run the PK module (pk.c) on the NS
side so TLS can use PSA APIs via the PK interface. PK currently has a
hard dependency on mbedtls_ecc_group_to_psa() which is declared in
crypto_extra.h, but only defined in psa_crypto.c, which is only built
for the S side.

Without this change, dual world platforms get error messages like the
following.

    [Error] @0,0: L6218E: Undefined symbol mbedtls_ecc_group_to_psa (referred from BUILD/LPC55S69_NS/ARM/mbed-os/features/mbedtls/mbed-crypto/src/pk.o)

Make mbedtls_ecc_group_to_psa() inline within crypto_extra.h so that it
is available to both NS and S world code.

Fixes #3300

Signed-off-by: Darryl Green <darryl.green@arm.com>
Signed-off-by: Jaeden Amero <jaeden.amero@arm.com>
This commit is contained in:
Darryl Green 2020-04-24 15:21:14 +01:00 committed by Jaeden Amero
parent 1bde9cdf71
commit 2f0eb51aae
3 changed files with 53 additions and 52 deletions
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4
ChangeLog.d/inline-mbedtls_gcc_group_to_psa.txt Normal file
View File

@ -0,0 +1,4 @@
Bugfix
* Fix potential linker errors on dual world platforms by inlining
mbedtls_gcc_group_to_psa(). This allows the pk.c module to link separately
from psa_crypto.c. Fixes #3300.

51
include/psa/crypto_extra.h
View File

@ -578,8 +578,55 @@ psa_status_t psa_get_key_domain_parameters(
* (`PSA_ECC_CURVE_xxx`).
* \return \c 0 on failure (\p grpid is not recognized).
*/
psa_ecc_curve_t mbedtls_ecc_group_to_psa( mbedtls_ecp_group_id grpid,
size_t *bits );
static inline psa_ecc_curve_t mbedtls_ecc_group_to_psa( mbedtls_ecp_group_id grpid,
size_t *bits )
{
switch( grpid )
{
case MBEDTLS_ECP_DP_SECP192R1:
*bits = 192;
return( PSA_ECC_CURVE_SECP_R1 );
case MBEDTLS_ECP_DP_SECP224R1:
*bits = 224;
return( PSA_ECC_CURVE_SECP_R1 );
case MBEDTLS_ECP_DP_SECP256R1:
*bits = 256;
return( PSA_ECC_CURVE_SECP_R1 );
case MBEDTLS_ECP_DP_SECP384R1:
*bits = 384;
return( PSA_ECC_CURVE_SECP_R1 );
case MBEDTLS_ECP_DP_SECP521R1:
*bits = 521;
return( PSA_ECC_CURVE_SECP_R1 );
case MBEDTLS_ECP_DP_BP256R1:
*bits = 256;
return( PSA_ECC_CURVE_BRAINPOOL_P_R1 );
case MBEDTLS_ECP_DP_BP384R1:
*bits = 384;
return( PSA_ECC_CURVE_BRAINPOOL_P_R1 );
case MBEDTLS_ECP_DP_BP512R1:
*bits = 512;
return( PSA_ECC_CURVE_BRAINPOOL_P_R1 );
case MBEDTLS_ECP_DP_CURVE25519:
*bits = 255;
return( PSA_ECC_CURVE_MONTGOMERY );
case MBEDTLS_ECP_DP_SECP192K1:
*bits = 192;
return( PSA_ECC_CURVE_SECP_K1 );
case MBEDTLS_ECP_DP_SECP224K1:
*bits = 224;
return( PSA_ECC_CURVE_SECP_K1 );
case MBEDTLS_ECP_DP_SECP256K1:
*bits = 256;
return( PSA_ECC_CURVE_SECP_K1 );
case MBEDTLS_ECP_DP_CURVE448:
*bits = 448;
return( PSA_ECC_CURVE_MONTGOMERY );
default:
*bits = 0;
return( 0 );
}
}
/** Convert an ECC curve identifier from the PSA encoding to Mbed TLS.
*

50
library/psa_crypto.c
View File

@ -375,56 +375,6 @@ static inline int psa_key_slot_is_external( const psa_key_slot_t *slot )
#endif /* MBEDTLS_PSA_CRYPTO_SE_C */
#if defined(MBEDTLS_ECP_C)
psa_ecc_curve_t mbedtls_ecc_group_to_psa( mbedtls_ecp_group_id grpid,
size_t *bits )
{
switch( grpid )
{
case MBEDTLS_ECP_DP_SECP192R1:
*bits = 192;
return( PSA_ECC_CURVE_SECP_R1 );
case MBEDTLS_ECP_DP_SECP224R1:
*bits = 224;
return( PSA_ECC_CURVE_SECP_R1 );
case MBEDTLS_ECP_DP_SECP256R1:
*bits = 256;
return( PSA_ECC_CURVE_SECP_R1 );
case MBEDTLS_ECP_DP_SECP384R1:
*bits = 384;
return( PSA_ECC_CURVE_SECP_R1 );
case MBEDTLS_ECP_DP_SECP521R1:
*bits = 521;
return( PSA_ECC_CURVE_SECP_R1 );
case MBEDTLS_ECP_DP_BP256R1:
*bits = 256;
return( PSA_ECC_CURVE_BRAINPOOL_P_R1 );
case MBEDTLS_ECP_DP_BP384R1:
*bits = 384;
return( PSA_ECC_CURVE_BRAINPOOL_P_R1 );
case MBEDTLS_ECP_DP_BP512R1:
*bits = 512;
return( PSA_ECC_CURVE_BRAINPOOL_P_R1 );
case MBEDTLS_ECP_DP_CURVE25519:
*bits = 255;
return( PSA_ECC_CURVE_MONTGOMERY );
case MBEDTLS_ECP_DP_SECP192K1:
*bits = 192;
return( PSA_ECC_CURVE_SECP_K1 );
case MBEDTLS_ECP_DP_SECP224K1:
*bits = 224;
return( PSA_ECC_CURVE_SECP_K1 );
case MBEDTLS_ECP_DP_SECP256K1:
*bits = 256;
return( PSA_ECC_CURVE_SECP_K1 );
case MBEDTLS_ECP_DP_CURVE448:
*bits = 448;
return( PSA_ECC_CURVE_MONTGOMERY );
default:
*bits = 0;
return( 0 );
}
}
mbedtls_ecp_group_id mbedtls_ecc_group_of_psa( psa_ecc_curve_t curve,
size_t byte_length )
{