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Using COSE keys write functions.

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Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>
This commit is contained in:
Pol Henarejos
2023-08-17 01:19:45 +02:00
parent 63e15b19bb
commit b7ceec8d49
5 changed files with 8 additions and 86 deletions
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17
src/fido/cbor_make_credential.c
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@@ -369,7 +369,6 @@ int cbor_make_credential(const uint8_t *data, size_t len) {
ext_len = cbor_encoder_get_buffer_size(&encoder, ext);
flags |= FIDO2_AUT_FLAG_ED;
}
uint8_t pkey[66];
mbedtls_ecdsa_context ekey;
mbedtls_ecdsa_init(&ekey);
int ret = fido_load_key(curve, cred_id, &ekey);
@@ -386,21 +385,7 @@ int cbor_make_credential(const uint8_t *data, size_t len) {
uint32_t ctr = get_sign_counter();
uint8_t cbor_buf[1024];
cbor_encoder_init(&encoder, cbor_buf, sizeof(cbor_buf), 0);
CBOR_CHECK(cbor_encoder_create_map(&encoder, &mapEncoder, 5));
CBOR_CHECK(cbor_encode_uint(&mapEncoder, 1));
CBOR_CHECK(cbor_encode_uint(&mapEncoder, 2));
CBOR_CHECK(cbor_encode_uint(&mapEncoder, 3));
CBOR_CHECK(cbor_encode_negative_int(&mapEncoder, -alg));
CBOR_CHECK(cbor_encode_negative_int(&mapEncoder, 1));
CBOR_CHECK(cbor_encode_uint(&mapEncoder, curve));
CBOR_CHECK(cbor_encode_negative_int(&mapEncoder, 2));
mbedtls_mpi_write_binary(&ekey.Q.X, pkey, mbedtls_mpi_size(&ekey.Q.X));
CBOR_CHECK(cbor_encode_byte_string(&mapEncoder, pkey, mbedtls_mpi_size(&ekey.Q.X)));
CBOR_CHECK(cbor_encode_negative_int(&mapEncoder, 3));
mbedtls_mpi_write_binary(&ekey.Q.Y, pkey, mbedtls_mpi_size(&ekey.Q.Y));
CBOR_CHECK(cbor_encode_byte_string(&mapEncoder, pkey, mbedtls_mpi_size(&ekey.Q.Y)));
CBOR_CHECK(cbor_encoder_close_container(&encoder, &mapEncoder));
CBOR_CHECK(COSE_key(&ekey, &encoder, &mapEncoder));
size_t rs = cbor_encoder_get_buffer_size(&encoder, cbor_buf);
size_t aut_data_len = 32 + 1 + 4 + (16 + 2 + cred_id_len + rs) + ext_len;