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Added support for signatures based on HD BIP/SLIP.

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Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>
This commit is contained in:
Pol Henarejos
2023-05-26 18:07:06 +02:00
parent c6c00e7e43
commit ee3ee21e40
3 changed files with 34 additions and 1 deletions
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24
src/hsm/cmd_signature.c
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@@ -14,13 +14,16 @@
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "sc_hsm.h"
#include "crypto_utils.h"
#include "sc_hsm.h"
#include "asn1.h"
#include "mbedtls/oid.h"
#include "random.h"
extern mbedtls_ecp_keypair hd_context;
extern uint8_t hd_keytype;
//-----
/* From OpenSC */
static const uint8_t hdr_md5[] = {
@@ -281,6 +284,25 @@ int cmd_signature() {
res_APDU_size = olen;
mbedtls_ecdsa_free(&ctx);
}
else if (p2 == ALGO_HD) {
size_t olen = 0;
uint8_t buf[MBEDTLS_ECDSA_MAX_LEN];
if (hd_context.grp.id == MBEDTLS_ECP_DP_NONE) {
return SW_CONDITIONS_NOT_SATISFIED();
}
if (hd_keytype != 0x1 && hd_keytype != 0x2) {
return SW_INCORRECT_PARAMS();
}
md = MBEDTLS_MD_SHA256;
if (mbedtls_ecdsa_write_signature(&hd_context, md, apdu.data, apdu.nc, buf, MBEDTLS_ECDSA_MAX_LEN,
&olen, random_gen, NULL) != 0) {
mbedtls_ecdsa_free(&hd_context);
return SW_EXEC_ERROR();
}
memcpy(res_APDU, buf, olen);
res_APDU_size = olen;
mbedtls_ecdsa_free(&hd_context);
}
else {
return SW_INCORRECT_P1P2();
}