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Fix key unwrap with latest OpenSC. Fixes #41.

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SC-HSM driver in OpenSC has changed the procedure for unwraping. It stores the wrap into a temporary file (0x2F10) and then it calls unwrap cmd.

Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>
This commit is contained in:
Pol Henarejos 2024-06-23 01:17:01 +02:00
parent dc979194fa
commit d708158fea
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GPG key ID: C0095B7870A4CCD3
1 changed files with 15 additions and 5 deletions
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20
src/hsm/cmd_key_unwrap.c
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@ -29,7 +29,17 @@ int cmd_key_unwrap() {
if (!isUserAuthenticated) {
return SW_SECURITY_STATUS_NOT_SATISFIED();
}
int key_type = dkek_type_key(apdu.data);
uint8_t *data = apdu.data;
uint16_t data_len = apdu.nc;
if (data_len == 0) { // New style
file_t *tef = search_file(0x2F10);
if (!file_has_data(tef)) {
return SW_FILE_NOT_FOUND();
}
data = file_get_data(tef);
data_len = file_get_size(tef);
}
int key_type = dkek_type_key(data);
uint8_t *allowed = NULL;
int16_t kdom = -1;
uint16_t allowed_len = 0;
@ -40,7 +50,7 @@ int cmd_key_unwrap() {
mbedtls_rsa_context ctx;
mbedtls_rsa_init(&ctx);
do {
r = dkek_decode_key((uint8_t)++kdom, &ctx, apdu.data, (uint16_t)apdu.nc, NULL, &allowed, &allowed_len);
r = dkek_decode_key((uint8_t)++kdom, &ctx, data, data_len, NULL, &allowed, &allowed_len);
} while ((r == CCID_ERR_FILE_NOT_FOUND || r == CCID_WRONG_DKEK) && kdom < MAX_KEY_DOMAINS);
if (r != CCID_OK) {
mbedtls_rsa_free(&ctx);
@ -60,7 +70,7 @@ int cmd_key_unwrap() {
mbedtls_ecdsa_context ctx;
mbedtls_ecdsa_init(&ctx);
do {
r = dkek_decode_key((uint8_t)++kdom, &ctx, apdu.data, (uint16_t)apdu.nc, NULL, &allowed, &allowed_len);
r = dkek_decode_key((uint8_t)++kdom, &ctx, data, data_len, NULL, &allowed, &allowed_len);
} while ((r == CCID_ERR_FILE_NOT_FOUND || r == CCID_WRONG_DKEK) && kdom < MAX_KEY_DOMAINS);
if (r != CCID_OK) {
mbedtls_ecdsa_free(&ctx);
@ -82,8 +92,8 @@ int cmd_key_unwrap() {
do {
r = dkek_decode_key((uint8_t)++kdom,
aes_key,
apdu.data,
(uint16_t)apdu.nc,
data,
data_len,
&key_size,
&allowed,
&allowed_len);