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Merge pull request #79 from canokeys/feature/static_password
Feature/static password
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,192 @@ | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
| #include <common.h> | ||
| #include <device.h> | ||
| #include <memzero.h> | ||
| #include <oath.h> | ||
| #include <pass.h> | ||
|
|
||
| #define PASS_FILE "pass" | ||
| #define SLOT_SHORT 0 | ||
| #define SLOT_LONG 1 | ||
|
|
||
| typedef struct { | ||
| slot_type_t type; | ||
| union { | ||
| struct { | ||
| uint8_t password_len; | ||
| uint8_t password[PASS_MAX_PASSWORD_LENGTH]; | ||
| } __packed; | ||
| struct { | ||
| uint32_t oath_offset; | ||
| uint8_t name_len; | ||
| uint8_t name[MAX_NAME_LEN]; | ||
| } __packed; | ||
| }; | ||
| uint8_t with_enter; | ||
| } __packed pass_slot_t; | ||
|
|
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| static pass_slot_t slots[2]; | ||
|
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| int pass_install(const uint8_t reset) { | ||
| if (reset || get_file_size(PASS_FILE) != sizeof(slots)) { | ||
| memzero(slots, sizeof(slots)); | ||
| if (write_file(PASS_FILE, slots, 0, sizeof(slots), 1) < 0) return -1; | ||
| } else { | ||
| if (read_file(PASS_FILE, slots, 0, sizeof(slots)) < 0) return -1; | ||
| } | ||
|
|
||
| return 0; | ||
| } | ||
|
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| // Dump slots to buffer, return the length of the buffer | ||
| // For each slot, the first byte is the type. | ||
| // For PASS_SLOT_OFF, there is no more data | ||
| // For PASS_SLOT_STATIC, the second byte is with_enter | ||
| // For PASS_SLOT_OATH, the next byte is the length of the name, followed by the name, and the next byte is with_enter | ||
| static int dump_slot(const pass_slot_t *slot, uint8_t *buffer) { | ||
| int length = 0; | ||
|
|
||
| // First byte is always the type | ||
| buffer[0] = (uint8_t)slot->type; | ||
| length++; | ||
|
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| switch (slot->type) { | ||
| case PASS_SLOT_OFF: | ||
| break; | ||
|
|
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| case PASS_SLOT_STATIC: | ||
| // For STATIC, the second byte is with_enter | ||
| buffer[length++] = slot->with_enter; | ||
| break; | ||
|
|
||
| case PASS_SLOT_OATH: | ||
| // For OATH, the second byte is the length of the name | ||
| buffer[length++] = slot->name_len; | ||
| // The next bytes are the name | ||
| memcpy(buffer + length, slot->name, slot->name_len); | ||
| length += slot->name_len; | ||
| // The next byte is with_enter | ||
| buffer[length++] = slot->with_enter; | ||
| break; | ||
|
|
||
| default: | ||
| // ERR_MSG("Invalid type %p %d\n", slot, slot->type); | ||
| return 0; | ||
| } | ||
|
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| return length; | ||
| } | ||
|
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| int pass_read_config(const CAPDU *capdu, RAPDU *rapdu) { | ||
| UNUSED(capdu); | ||
|
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| int length = dump_slot(&slots[SLOT_SHORT], RDATA); | ||
| length += dump_slot(&slots[SLOT_LONG], RDATA + length); | ||
| LL = length; | ||
|
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||
| return 0; | ||
| } | ||
|
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| // P1 for the slot index, 1 for short slot, 2 for long slot | ||
| // DATA contains the slot data: | ||
| // The first byte is the slot type | ||
| // For OFF, there is no more data | ||
| // For STATIC, the second byte is the length of the password, followed by the password, and the next byte is with_enter | ||
| // OATH is not allowed to be written here | ||
| int pass_write_config(const CAPDU *capdu, RAPDU *rapdu) { | ||
| if (P1 != 1 && P1 != 2) EXCEPT(SW_WRONG_P1P2); | ||
| if (LC < 1) EXCEPT(SW_WRONG_LENGTH); | ||
|
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| pass_slot_t *slot = &slots[P1 - 1]; | ||
|
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| switch (DATA[0]) { | ||
| case PASS_SLOT_OFF: | ||
| if (LC != 1) EXCEPT(SW_WRONG_LENGTH); | ||
| break; | ||
|
|
||
| case PASS_SLOT_STATIC: | ||
| if (LC < 3) EXCEPT(SW_WRONG_LENGTH); | ||
| if (DATA[1] > PASS_MAX_PASSWORD_LENGTH) EXCEPT(SW_WRONG_LENGTH); | ||
| if (LC != 3 + DATA[1]) EXCEPT(SW_WRONG_LENGTH); | ||
| slot->password_len = DATA[1]; | ||
| memcpy(slot->password, DATA + 2, slot->password_len); | ||
| slot->with_enter = DATA[2 + slot->password_len]; | ||
| break; | ||
|
|
||
| default: | ||
| EXCEPT(SW_WRONG_DATA); | ||
| } | ||
| slot->type = (slot_type_t)DATA[0]; | ||
| DBG_MSG("Set type %p %d\n", slot, slot->type); | ||
|
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| return write_file(PASS_FILE, slots, 0, sizeof(slots), 1); | ||
| } | ||
|
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| int pass_update_oath(uint8_t slot_index, uint32_t file_offset, uint8_t name_len, const uint8_t *name, uint8_t with_enter) { | ||
| pass_slot_t *slot = &slots[slot_index]; | ||
| slot->type = PASS_SLOT_OATH; | ||
| slot->oath_offset = file_offset; | ||
| slot->name_len = name_len; | ||
| memcpy(slot->name, name, name_len); | ||
| slot->with_enter = with_enter; | ||
|
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||
| return write_file(PASS_FILE, slots, 0, sizeof(slots), 1); | ||
| } | ||
|
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| int pass_delete_oath(uint32_t file_offset) { | ||
| if (slots[0].type == PASS_SLOT_OATH && slots[0].oath_offset == file_offset) { | ||
| slots[0].type = PASS_SLOT_OFF; | ||
| return write_file(PASS_FILE, slots, 0, sizeof(slots), 1); | ||
| } | ||
| if (slots[1].type == PASS_SLOT_OATH && slots[1].oath_offset == file_offset) { | ||
| slots[1].type = PASS_SLOT_OFF; | ||
| return write_file(PASS_FILE, slots, 0, sizeof(slots), 1); | ||
| } | ||
| return 0; | ||
| } | ||
|
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| static int oath_process_offset(uint32_t file_offset, char *output) { | ||
| uint32_t otp_code; | ||
| int ret = oath_calculate_by_offset(file_offset, (uint8_t *)&otp_code); | ||
| if (ret < 0) return ret; | ||
| const int len = ret; | ||
|
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| otp_code = htobe32(otp_code); | ||
| while (ret--) { | ||
| output[ret] = otp_code % 10 + '0'; | ||
| otp_code /= 10; | ||
| } | ||
| output[len] = '\0'; | ||
|
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| return len; | ||
| } | ||
|
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| int pass_handle_touch(uint8_t touch_type, char *output) { | ||
| pass_slot_t *slot; | ||
| if (touch_type == TOUCH_SHORT) | ||
| slot = &slots[SLOT_SHORT]; | ||
| else if (touch_type == TOUCH_LONG) | ||
| slot = &slots[SLOT_LONG]; | ||
| else | ||
| return -1; | ||
|
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| int length; | ||
| switch (slot->type) { | ||
| case PASS_SLOT_OFF: | ||
| return 0; | ||
| case PASS_SLOT_OATH: | ||
| length = oath_process_offset(slot->oath_offset, output); | ||
| if (length < 0) return -1; | ||
| break; | ||
| case PASS_SLOT_STATIC: | ||
| memcpy(output, slot->password, slot->password_len); | ||
| length = slot->password_len; | ||
| break; | ||
| default: | ||
| return -1; | ||
| } | ||
|
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| if (slot->with_enter) output[length++] = '\r'; | ||
|
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| return length; | ||
| } |
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