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Adding press-to-confirm when loading a private key.

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Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>
This commit is contained in:
Pol Henarejos
2022-05-05 20:55:41 +02:00
parent 4e2f3ce38d
commit d95d19a85b
1 changed files with 42 additions and 13 deletions
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55
src/openpgp/openpgp.c
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@@ -52,6 +52,19 @@ char atr_openpgp[] = {
int openpgp_process_apdu(); int openpgp_process_apdu();
extern uint32_t board_button_read(void);
static bool wait_button() {
uint32_t val = EV_PRESS_BUTTON;
queue_try_add(ccid_comm, &val);
do {
queue_remove_blocking(card_comm, &val);
}
while (val != EV_BUTTON_PRESSED && val != EV_BUTTON_TIMEOUT);
return val == EV_BUTTON_TIMEOUT;
}
void select_file(file_t *pe) { void select_file(file_t *pe) {
if (!pe) if (!pe)
{ {
@@ -950,12 +963,14 @@ int store_keys(void *key_ctx, int type, uint16_t key_id) {
} }
int load_private_key_rsa(mbedtls_rsa_context *ctx, file_t *fkey) { int load_private_key_rsa(mbedtls_rsa_context *ctx, file_t *fkey) {
//wait_button(); if (wait_button() == true) //timeout
return CCID_VERIFICATION_FAILED;
int key_size = file_read_uint16(fkey->data); int key_size = file_read_uint16(fkey->data);
uint8_t kdata[4096/8]; uint8_t kdata[4096/8];
memcpy(kdata, file_read(fkey->data+2), key_size); memcpy(kdata, file_read(fkey->data+2), key_size);
if (dek_decrypt(kdata, key_size) != 0) { if (dek_decrypt(kdata, key_size) != 0) {
return SW_EXEC_ERROR(); return CCID_EXEC_ERROR;
} }
if (mbedtls_mpi_read_binary(&ctx->P, kdata, key_size/2) != 0) { if (mbedtls_mpi_read_binary(&ctx->P, kdata, key_size/2) != 0) {
mbedtls_rsa_free(ctx); mbedtls_rsa_free(ctx);
@@ -985,12 +1000,14 @@ int load_private_key_rsa(mbedtls_rsa_context *ctx, file_t *fkey) {
} }
int load_private_key_ecdsa(mbedtls_ecdsa_context *ctx, file_t *fkey) { int load_private_key_ecdsa(mbedtls_ecdsa_context *ctx, file_t *fkey) {
//wait_button(); if (wait_button() == true) //timeout
return CCID_VERIFICATION_FAILED;
int key_size = file_read_uint16(fkey->data); int key_size = file_read_uint16(fkey->data);
uint8_t kdata[67]; //Worst case, 521 bit + 1byte uint8_t kdata[67]; //Worst case, 521 bit + 1byte
memcpy(kdata, file_read(fkey->data+2), key_size); memcpy(kdata, file_read(fkey->data+2), key_size);
if (dek_decrypt(kdata, key_size) != 0) { if (dek_decrypt(kdata, key_size) != 0) {
return SW_EXEC_ERROR(); return CCID_EXEC_ERROR;
} }
mbedtls_ecp_group_id gid = kdata[0]; mbedtls_ecp_group_id gid = kdata[0];
int r = mbedtls_ecp_read_key(gid, ctx, kdata+1, key_size-1); int r = mbedtls_ecp_read_key(gid, ctx, kdata+1, key_size-1);
@@ -1087,13 +1104,11 @@ static int cmd_keypair_gen() {
mbedtls_rsa_init(&rsa); mbedtls_rsa_init(&rsa);
uint8_t index = 0; uint8_t index = 0;
r = mbedtls_rsa_gen_key(&rsa, random_gen, &index, nlen, exponent); r = mbedtls_rsa_gen_key(&rsa, random_gen, &index, nlen, exponent);
printf("r %d\r\n",r);
if (r != 0) { if (r != 0) {
mbedtls_rsa_free(&rsa); mbedtls_rsa_free(&rsa);
return SW_EXEC_ERROR(); return SW_EXEC_ERROR();
} }
r = store_keys(&rsa, ALGO_RSA, fid); r = store_keys(&rsa, ALGO_RSA, fid);
printf("r %d\r\n",r);
make_rsa_response(&rsa); make_rsa_response(&rsa);
mbedtls_rsa_free(&rsa); mbedtls_rsa_free(&rsa);
if (r != CCID_OK) if (r != CCID_OK)
@@ -1258,8 +1273,11 @@ static int cmd_pso() {
mbedtls_rsa_context ctx; mbedtls_rsa_context ctx;
mbedtls_rsa_init(&ctx); mbedtls_rsa_init(&ctx);
r = load_private_key_rsa(&ctx, ef); r = load_private_key_rsa(&ctx, ef);
if (r != CCID_OK) if (r != CCID_OK) {
if (r == CCID_VERIFICATION_FAILED)
return SW_SECURE_MESSAGE_EXEC_ERROR();
return SW_EXEC_ERROR(); return SW_EXEC_ERROR();
}
if (P1(apdu) == 0x9E && P2(apdu) == 0x9A) { if (P1(apdu) == 0x9E && P2(apdu) == 0x9A) {
size_t olen = 0; size_t olen = 0;
r = rsa_sign(&ctx, apdu.cmd_apdu_data, apdu.cmd_apdu_data_len, res_APDU, &olen); r = rsa_sign(&ctx, apdu.cmd_apdu_data, apdu.cmd_apdu_data_len, res_APDU, &olen);
@@ -1286,8 +1304,11 @@ static int cmd_pso() {
mbedtls_ecdsa_context ctx; mbedtls_ecdsa_context ctx;
mbedtls_ecdsa_init(&ctx); mbedtls_ecdsa_init(&ctx);
r = load_private_key_ecdsa(&ctx, ef); r = load_private_key_ecdsa(&ctx, ef);
if (r != CCID_OK) if (r != CCID_OK) {
return SW_CONDITIONS_NOT_SATISFIED(); if (r == CCID_VERIFICATION_FAILED)
return SW_SECURE_MESSAGE_EXEC_ERROR();
return SW_EXEC_ERROR();
}
size_t olen = 0; size_t olen = 0;
r = ecdsa_sign(&ctx, apdu.cmd_apdu_data, apdu.cmd_apdu_data_len, res_APDU, &olen); r = ecdsa_sign(&ctx, apdu.cmd_apdu_data, apdu.cmd_apdu_data_len, res_APDU, &olen);
mbedtls_ecdsa_free(&ctx); mbedtls_ecdsa_free(&ctx);
@@ -1307,7 +1328,9 @@ static int cmd_pso() {
if (mbedtls_asn1_get_tag(&data, end, &len, 0x49) != 0 || mbedtls_asn1_get_tag(&data, end, &len, 0x86) != 0) if (mbedtls_asn1_get_tag(&data, end, &len, 0x49) != 0 || mbedtls_asn1_get_tag(&data, end, &len, 0x86) != 0)
return SW_WRONG_DATA(); return SW_WRONG_DATA();
if (len != 2*key_size-1) if (len != 2*key_size-1)
return SW_WRONG_LENGTH(); return SW_WRONG_LENGTH();
if (wait_button() == true)
return SW_SECURE_MESSAGE_EXEC_ERROR();
memcpy(kdata, file_read(ef->data+2), key_size); memcpy(kdata, file_read(ef->data+2), key_size);
if (dek_decrypt(kdata, key_size) != 0) { if (dek_decrypt(kdata, key_size) != 0) {
return SW_EXEC_ERROR(); return SW_EXEC_ERROR();
@@ -1392,8 +1415,11 @@ static int cmd_internal_aut() {
mbedtls_rsa_context ctx; mbedtls_rsa_context ctx;
mbedtls_rsa_init(&ctx); mbedtls_rsa_init(&ctx);
r = load_private_key_rsa(&ctx, ef); r = load_private_key_rsa(&ctx, ef);
if (r != CCID_OK) if (r != CCID_OK) {
if (r == CCID_VERIFICATION_FAILED)
return SW_SECURE_MESSAGE_EXEC_ERROR();
return SW_EXEC_ERROR(); return SW_EXEC_ERROR();
}
size_t olen = 0; size_t olen = 0;
r = rsa_sign(&ctx, apdu.cmd_apdu_data, apdu.cmd_apdu_data_len, res_APDU, &olen); r = rsa_sign(&ctx, apdu.cmd_apdu_data, apdu.cmd_apdu_data_len, res_APDU, &olen);
mbedtls_rsa_free(&ctx); mbedtls_rsa_free(&ctx);
@@ -1405,8 +1431,11 @@ static int cmd_internal_aut() {
mbedtls_ecdsa_context ctx; mbedtls_ecdsa_context ctx;
mbedtls_ecdsa_init(&ctx); mbedtls_ecdsa_init(&ctx);
r = load_private_key_ecdsa(&ctx, ef); r = load_private_key_ecdsa(&ctx, ef);
if (r != CCID_OK) if (r != CCID_OK) {
return SW_CONDITIONS_NOT_SATISFIED(); if (r == CCID_VERIFICATION_FAILED)
return SW_SECURE_MESSAGE_EXEC_ERROR();
return SW_EXEC_ERROR();
}
size_t olen = 0; size_t olen = 0;
r = ecdsa_sign(&ctx, apdu.cmd_apdu_data, apdu.cmd_apdu_data_len, res_APDU, &olen); r = ecdsa_sign(&ctx, apdu.cmd_apdu_data, apdu.cmd_apdu_data_len, res_APDU, &olen);
mbedtls_ecdsa_free(&ctx); mbedtls_ecdsa_free(&ctx);