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Add support for RSA Opaque PK key in mbedtls_pk_write_pubkey_der()

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Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
This commit is contained in:
Neil Armstrong 2022-03-15 16:25:41 +01:00
parent b980c9b48c
commit 295aeb17e6
1 changed files with 28 additions and 14 deletions
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42
library/pkwrite.c
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@ -279,21 +279,35 @@ int mbedtls_pk_write_pubkey_der( const mbedtls_pk_context *key, unsigned char *b
bits = psa_get_key_bits( &attributes ); bits = psa_get_key_bits( &attributes );
psa_reset_key_attributes( &attributes ); psa_reset_key_attributes( &attributes );
curve = PSA_KEY_TYPE_ECC_GET_FAMILY( key_type ); if( PSA_KEY_TYPE_IS_ECC_KEY_PAIR( key_type ) )
if( curve == 0 ) {
curve = PSA_KEY_TYPE_ECC_GET_FAMILY( key_type );
if( curve == 0 )
return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE );
ret = mbedtls_psa_get_ecc_oid_from_id( curve, bits,
&oid, &oid_len );
if( ret != 0 )
return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE );
/* Write EC algorithm parameters; that's akin
* to pk_write_ec_param() above. */
MBEDTLS_ASN1_CHK_ADD( par_len, mbedtls_asn1_write_oid( &c, buf,
oid,
oid_len ) );
/* The rest of the function works as for legacy EC contexts. */
pk_type = MBEDTLS_PK_ECKEY;
}
else if( PSA_KEY_TYPE_IS_RSA( key_type ) )
{
/* The rest of the function works as for legacy RSA contexts. */
pk_type = MBEDTLS_PK_RSA;
}
else
{
return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE ); return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE );
}
ret = mbedtls_psa_get_ecc_oid_from_id( curve, bits, &oid, &oid_len );
if( ret != 0 )
return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE );
/* Write EC algorithm parameters; that's akin
* to pk_write_ec_param() above. */
MBEDTLS_ASN1_CHK_ADD( par_len, mbedtls_asn1_write_oid( &c, buf,
oid, oid_len ) );
/* The rest of the function works as for legacy EC contexts. */
pk_type = MBEDTLS_PK_ECKEY;
} }
#endif /* MBEDTLS_USE_PSA_CRYPTO */ #endif /* MBEDTLS_USE_PSA_CRYPTO */