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Adding support for EdDSA with Ed25519 curve.

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Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>
This commit is contained in:
Pol Henarejos
2023-08-16 14:47:34 +02:00
parent 69d618cc6b
commit e8c8ce4d15
6 changed files with 101 additions and 48 deletions
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12
src/fido/fido.c
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@@ -92,10 +92,16 @@ mbedtls_ecp_group_id fido_curve_to_mbedtls(int curve) {
else if (curve == FIDO2_CURVE_X448) {
return MBEDTLS_ECP_DP_CURVE448;
}
else if (curve == FIDO2_CURVE_ED25519) {
return MBEDTLS_ECP_DP_ED25519;
}
else if (curve == FIDO2_CURVE_ED448) {
return MBEDTLS_ECP_DP_ED448;
}
return MBEDTLS_ECP_DP_NONE;
}
int fido_load_key(int curve, const uint8_t *cred_id, mbedtls_ecdsa_context *key) {
int fido_load_key(int curve, const uint8_t *cred_id, mbedtls_ecp_keypair *key) {
mbedtls_ecp_group_id mbedtls_curve = fido_curve_to_mbedtls(curve);
if (mbedtls_curve == MBEDTLS_ECP_DP_NONE) {
return CTAP2_ERR_UNSUPPORTED_ALGORITHM;
@@ -152,7 +158,7 @@ int load_keydev(uint8_t *key) {
return CCID_OK;
}
int verify_key(const uint8_t *appId, const uint8_t *keyHandle, mbedtls_ecdsa_context *key) {
int verify_key(const uint8_t *appId, const uint8_t *keyHandle, mbedtls_ecp_keypair *key) {
for (int i = 0; i < KEY_PATH_ENTRIES; i++) {
uint32_t k = *(uint32_t *) &keyHandle[i * sizeof(uint32_t)];
if (!(k & 0x80000000)) {
@@ -194,7 +200,7 @@ int derive_key(const uint8_t *app_id,
bool new_key,
uint8_t *key_handle,
int curve,
mbedtls_ecdsa_context *key) {
mbedtls_ecp_keypair *key) {
uint8_t outk[64] = { 0 };
int r = 0;
memset(outk, 0, sizeof(outk));