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Adding cbor_get_info().

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This is the first funciont that uses TinyCBOR to encode the cbor message.

Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>
This commit is contained in:
Pol Henarejos
2022-09-09 20:35:11 +02:00
parent c6a129b6ad
commit 4a1bddb3d5
1 changed files with 69 additions and 2 deletions
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71
src/usb/hid/hid.c
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@@ -22,6 +22,7 @@
#include "apdu.h"
#include "usb.h"
#include "bsp/board.h"
#include "cbor.h"
#define CTAP_MAX_PACKET_SIZE (64 - 7 + 128 * (64 - 5))
@@ -142,16 +143,82 @@ uint8_t last_seq = 0;
CTAPHID_FRAME last_req = { 0 };
uint32_t lock = 0;
const uint8_t aaguid[16] = {0x89, 0xFB, 0x94, 0xB7, 0x06, 0xC9, 0x36, 0x73, 0x9B, 0x7E, 0x30, 0x52, 0x6D, 0x96, 0x81, 0x45}; // First 16 bytes of SHA256("Pico FIDO2")
int cbor_make_credential(const uint8_t *data, size_t len) {
return 0;
}
#define CHECK_CBOR(f) \
do \
{ \
CborError err = f; \
if (err != CborNoError) \
{ \
printf("Cannot encode CBOR: %s\n", #f); \
return err; \
} \
} while (0)
int cbor_get_info() {
CborEncoder encoder, mapEncoder, arrayEncoder;
cbor_encoder_init(&encoder, ctap_resp->init.data + 1, CTAP_MAX_PACKET_SIZE, 0);
CHECK_CBOR(cbor_encoder_create_map(&encoder, &mapEncoder, 7));
CHECK_CBOR(cbor_encode_simple_value(&mapEncoder, 0x01));
CHECK_CBOR(cbor_encoder_create_array(&mapEncoder, &arrayEncoder, 2));
CHECK_CBOR(cbor_encode_text_stringz(&arrayEncoder, "U2F_V2"));
CHECK_CBOR(cbor_encode_text_stringz(&arrayEncoder, "FIDO_2_0"));
CHECK_CBOR(cbor_encoder_close_container(&mapEncoder, &arrayEncoder));
CHECK_CBOR(cbor_encode_simple_value(&mapEncoder, 0x02));
CHECK_CBOR(cbor_encoder_create_array(&mapEncoder, &arrayEncoder, 1));
CHECK_CBOR(cbor_encode_text_stringz(&arrayEncoder, "hmac-secret"));
CHECK_CBOR(cbor_encoder_close_container(&mapEncoder, &arrayEncoder));
CHECK_CBOR(cbor_encode_simple_value(&mapEncoder, 0x03));
CHECK_CBOR(cbor_encode_byte_string(&mapEncoder, aaguid, sizeof(aaguid)));
CHECK_CBOR(cbor_encode_simple_value(&mapEncoder, 0x04));
CHECK_CBOR(cbor_encoder_create_map(&mapEncoder, &arrayEncoder, 3));
CHECK_CBOR(cbor_encode_text_stringz(&arrayEncoder, "rk"));
CHECK_CBOR(cbor_encode_boolean(&arrayEncoder, true));
CHECK_CBOR(cbor_encode_text_stringz(&arrayEncoder, "up"));
CHECK_CBOR(cbor_encode_boolean(&arrayEncoder, true));
CHECK_CBOR(cbor_encode_text_stringz(&arrayEncoder, "uv"));
CHECK_CBOR(cbor_encode_boolean(&arrayEncoder, true));
CHECK_CBOR(cbor_encoder_close_container(&mapEncoder, &arrayEncoder));
CHECK_CBOR(cbor_encode_simple_value(&mapEncoder, 0x06));
CHECK_CBOR(cbor_encoder_create_array(&mapEncoder, &arrayEncoder, 1));
CHECK_CBOR(cbor_encode_simple_value(&arrayEncoder, 1)); // PIN protocols
CHECK_CBOR(cbor_encoder_close_container(&mapEncoder, &arrayEncoder));
CHECK_CBOR(cbor_encode_simple_value(&mapEncoder, 0x07));
CHECK_CBOR(cbor_encoder_create_array(&mapEncoder, &arrayEncoder, 1));
CHECK_CBOR(cbor_encode_simple_value(&arrayEncoder, 10)); // MAX_CRED_COUNT_IN_LIST
CHECK_CBOR(cbor_encoder_close_container(&mapEncoder, &arrayEncoder));
CHECK_CBOR(cbor_encode_simple_value(&mapEncoder, 0x08));
CHECK_CBOR(cbor_encoder_create_array(&mapEncoder, &arrayEncoder, 1));
CHECK_CBOR(cbor_encode_uint(&arrayEncoder, 1024)); // CRED_ID_MAX_LENGTH
CHECK_CBOR(cbor_encoder_close_container(&mapEncoder, &arrayEncoder));
CHECK_CBOR(cbor_encoder_close_container(&encoder, &mapEncoder));
size_t rs = cbor_encoder_get_buffer_size(&encoder, ctap_resp->init.data + 1);
driver_exec_finished(rs + 1);
return 0;
}
int cbor_process(const uint8_t *data, size_t len) {
if (len == 0)
return -ERR_INVALID_LEN;
driver_prepare_response();
if (data[0] == CTAP_MAKE_CREDENTIAL)
return cbor_make_credential(data + 1, len - 1);
return 0;
else if (data[0] == CTAP_GET_INFO)
return cbor_get_info();
return -ERR_INVALID_PAR;
}
int driver_process_usb_packet(uint16_t read) {
@@ -206,7 +273,7 @@ int driver_process_usb_packet(uint16_t read) {
resp->versionInterface = CTAPHID_IF_VERSION;
resp->versionMajor = HSM_SDK_VERSION_MAJOR;
resp->versionMinor = HSM_SDK_VERSION_MINOR;
resp->capFlags = CAPFLAG_WINK;
resp->capFlags = CAPFLAG_WINK | CAPFLAG_CBOR;
ctap_resp->cid = CID_BROADCAST;
ctap_resp->init.cmd = CTAPHID_INIT;