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Use ledger protocol to split NFC APDUs
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,26 @@ | ||
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| /******************************************************************************* | ||
| * Ledger Nano S - Secure firmware | ||
| * (c) 2022 Ledger | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| ********************************************************************************/ | ||
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| #ifndef OS_IO_NFC_H | ||
| #define OS_IO_NFC_H | ||
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| void io_nfc_init(void); | ||
| void io_nfc_recv_event(void); | ||
| void io_nfc_send_response(const uint8_t *packet, uint16_t packet_length); | ||
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| #endif |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,110 @@ | ||
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| /******************************************************************************* | ||
| * Ledger Nano S - Secure firmware | ||
| * (c) 2022 Ledger | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| ********************************************************************************/ | ||
| #include "bolos_target.h" | ||
| #include "errors.h" | ||
| #include "exceptions.h" | ||
| #ifdef HAVE_NFC | ||
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| #if defined(DEBUG_OS_STACK_CONSUMPTION) | ||
| #include "os_debug.h" | ||
| #endif // DEBUG_OS_STACK_CONSUMPTION | ||
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| #include "os_io.h" | ||
| #include "os_utils.h" | ||
| #include "os_io_seproxyhal.h" | ||
| #include <string.h> | ||
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| #ifdef DEBUG | ||
| #define LOG printf | ||
| #else | ||
| #define LOG(...) | ||
| #endif | ||
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| #include "os.h" | ||
| #include "ledger_protocol.h" | ||
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| static uint8_t rx_apdu_buffer[IO_APDU_BUFFER_SIZE]; | ||
| static ledger_protocol_t ledger_protocol_data; | ||
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| void io_nfc_init(void) | ||
| { | ||
| memset(&rx_apdu_buffer, 0, sizeof(rx_apdu_buffer)); | ||
| memset(&ledger_protocol_data, 0, sizeof(ledger_protocol_data)); | ||
| ledger_protocol_data.rx_apdu_buffer = rx_apdu_buffer; | ||
| ledger_protocol_data.rx_apdu_buffer_max_length = sizeof(rx_apdu_buffer); | ||
| ledger_protocol_data.mtu | ||
| = MIN(sizeof(ledger_protocol_data.tx_chunk), sizeof(G_io_seproxyhal_spi_buffer) - 3); | ||
| #ifdef HAVE_LOCAL_APDU_BUFFER | ||
| ledger_protocol_data.rx_dst_buffer = NULL; | ||
| #else | ||
| ledger_protocol_data.rx_dst_buffer = G_io_apdu_buffer; | ||
| #endif | ||
| LEDGER_PROTOCOL_init(&ledger_protocol_data); | ||
| } | ||
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| void io_nfc_recv_event(void) | ||
| { | ||
| size_t size = U2BE(G_io_seproxyhal_spi_buffer, 1); | ||
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| LEDGER_PROTOCOL_rx(&ledger_protocol_data, G_io_seproxyhal_spi_buffer + 3, size); | ||
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| // Full apdu is received, copy it to global apdu buffer | ||
| if (ledger_protocol_data.rx_apdu_status == APDU_STATUS_COMPLETE) { | ||
| memcpy(ledger_protocol_data.rx_dst_buffer, | ||
| ledger_protocol_data.rx_apdu_buffer, | ||
| ledger_protocol_data.rx_apdu_length); | ||
| G_io_app.apdu_length = ledger_protocol_data.rx_apdu_length; | ||
| G_io_app.apdu_state = APDU_NFC; | ||
| G_io_app.apdu_media = IO_APDU_MEDIA_NFC; | ||
| ledger_protocol_data.rx_apdu_length = 0; | ||
| ledger_protocol_data.rx_apdu_status = APDU_STATUS_WAITING; | ||
| } | ||
| } | ||
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| void io_nfc_send_response(const uint8_t *packet, uint16_t packet_length) | ||
| { | ||
| LEDGER_PROTOCOL_tx(&ledger_protocol_data, packet, packet_length); | ||
| if (ledger_protocol_data.tx_chunk_length >= 2) { | ||
| // reply the NFC APDU over SEPROXYHAL protocol | ||
| G_io_seproxyhal_spi_buffer[0] = SEPROXYHAL_TAG_NFC_RAPDU; | ||
| G_io_seproxyhal_spi_buffer[1] = (ledger_protocol_data.tx_chunk_length) >> 8; | ||
| G_io_seproxyhal_spi_buffer[2] = (ledger_protocol_data.tx_chunk_length); | ||
| memcpy(G_io_seproxyhal_spi_buffer + 3, | ||
| ledger_protocol_data.tx_chunk, | ||
| ledger_protocol_data.tx_chunk_length); | ||
| io_seproxyhal_spi_send(G_io_seproxyhal_spi_buffer, | ||
| 3 + ledger_protocol_data.tx_chunk_length); | ||
| } | ||
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| while (ledger_protocol_data.tx_apdu_buffer) { | ||
| LEDGER_PROTOCOL_tx(&ledger_protocol_data, NULL, 0); | ||
| if (ledger_protocol_data.tx_chunk_length >= 2) { | ||
| // reply the NFC APDU over SEPROXYHAL protocol | ||
| G_io_seproxyhal_spi_buffer[0] = SEPROXYHAL_TAG_NFC_RAPDU; | ||
| G_io_seproxyhal_spi_buffer[1] = (ledger_protocol_data.tx_chunk_length) >> 8; | ||
| G_io_seproxyhal_spi_buffer[2] = (ledger_protocol_data.tx_chunk_length); | ||
| memcpy(G_io_seproxyhal_spi_buffer + 3, | ||
| ledger_protocol_data.tx_chunk, | ||
| ledger_protocol_data.tx_chunk_length); | ||
| io_seproxyhal_spi_send(G_io_seproxyhal_spi_buffer, | ||
| 3 + ledger_protocol_data.tx_chunk_length); | ||
| } | ||
| } | ||
| } | ||
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| #endif // HAVE_NFC |
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