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pk_wrap: improve error codes returned from ecdsa_verify_wrap

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Use the shared PSA utilities to translate errors.
This commit is contained in:
Andrzej Kurek 2018-11-19 14:53:35 -05:00
parent 2122774d72
commit 4f0253962e
1 changed files with 9 additions and 10 deletions
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19
library/pk_wrap.c
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@ -492,15 +492,14 @@ static int extract_ecdsa_sig( unsigned char **p, const unsigned char *end,
if( ( end - *p ) < 1 )
{
return( MBEDTLS_ERR_X509_INVALID_SIGNATURE +
MBEDTLS_ERR_ASN1_OUT_OF_DATA );
return( MBEDTLS_ERR_ASN1_OUT_OF_DATA );
}
tag_type = **p;
if( ( ret = mbedtls_asn1_get_tag( p, end, &len_partial,
MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
{
return( MBEDTLS_ERR_X509_INVALID_SIGNATURE + ret );
return( ret );
}
if( ( ret = mbedtls_asn1_get_tag( p, end, &len_partial, MBEDTLS_ASN1_INTEGER ) )
@ -536,7 +535,7 @@ static int extract_ecdsa_sig( unsigned char **p, const unsigned char *end,
// Check if both parts are of the same size
if( len_partial != len_signature )
return( MBEDTLS_ERR_X509_INVALID_SIGNATURE );
return( MBEDTLS_ERR_PK_SIG_LEN_MISMATCH );
memcpy( sig->p + len_partial, *p, len_partial );
len_signature += len_partial;
@ -638,8 +637,8 @@ static int ecdsa_verify_wrap( void *ctx, mbedtls_md_type_t md_alg,
psa_type = PSA_KEY_TYPE_ECC_PUBLIC_KEY( curve );
if( extract_ecdsa_sig( &p, p + sig_len, &signature ) != 0 )
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
if( ( ret = extract_ecdsa_sig( &p, p + sig_len, &signature ) ) != 0 )
return( ret );
key_len = mbedtls_pk_write_pubkey_der( &key, buf, buf_len );
if( key_len <= 0 )
@ -648,17 +647,17 @@ static int ecdsa_verify_wrap( void *ctx, mbedtls_md_type_t md_alg,
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
}
if( mbedtls_psa_get_free_key_slot( &key_slot ) != PSA_SUCCESS )
if( ( ret = mbedtls_psa_get_free_key_slot( &key_slot ) ) != PSA_SUCCESS )
{
mbedtls_free( signature.p );
return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE );
return( mbedtls_psa_err_translate_pk( ret ) );
}
psa_key_policy_init( &policy );
psa_key_policy_set_usage( &policy, PSA_KEY_USAGE_VERIFY, psa_sig_md );
if( psa_set_key_policy( key_slot, &policy ) != PSA_SUCCESS )
if( ( ret = psa_set_key_policy( key_slot, &policy ) ) != PSA_SUCCESS )
{
ret = MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE;
ret = mbedtls_psa_err_translate_pk( ret );
goto cleanup;
}