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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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10
src/hsm/cmd_bip_slip.c
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@@ -24,6 +24,8 @@
const uint8_t *k1_seed = (const uint8_t *)"Bitcoin seed";
const uint8_t *p1_seed = (const uint8_t *)"Nist256p1 seed";
const uint8_t *sym_seed = (const uint8_t *)"Symmetric key seed";
mbedtls_ecp_keypair hd_context = {0};
uint8_t hd_keytype = 0;
int node_derive_bip_child(const mbedtls_ecp_keypair *parent, const uint8_t cpar[32], const uint8_t *i, mbedtls_ecp_keypair *child, uint8_t cchild[32]) {
uint8_t data[1+32+4], I[64], *iL = I, *iR = I + 32;
@@ -261,5 +263,13 @@ int cmd_bip_slip() {
}
mbedtls_ecp_keypair_free(&ctx);
}
else if (p1 == 0x10) {
uint8_t chain[32] = {0}, fgpt[4] = {0}, last_node[4] = {0}, nodes = 0;
int r = node_derive_path(apdu.data, apdu.nc, &hd_context, chain, fgpt, &nodes, last_node, &hd_keytype);
if (r != CCID_OK) {
mbedtls_ecp_keypair_free(&hd_context);
return SW_EXEC_ERROR();
}
}
return SW_OK();
}