90 lines
2 KiB
C
90 lines
2 KiB
C
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#ifndef _CONFIG_H_
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#define _CONFIG_H_
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/* START of configuration */
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#define DEBUG_LEVEL 0
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#define ENCRYPTION 1
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#define WRITE_PROTECTION 1
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#define BTN_LONG_PRESS 40
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/* slot types */
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#define SLOT_EMPTY 0 /* an empty slot */
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#define SLOT_STRING 1 /* a stored password as string */
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#define SLOT_OTP 2 /* a stored sequence and seed for one time passwords */
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#define SLOT_RANDOM 3 /* password gets generated each time */
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#define SLOT_GENERATE 4 /* password will be generated on key during configuration */
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/* the most significant bits of slot.type have a special meaning */
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#define SKIP_USER (1 << 0) /* just print the password */
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#define SKIP_RETURN (1 << 1) /* omit trailing newline after password */
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#define SKIP_DELIMITER (1 << 2) /* omit delimiter between username and password */
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#define SKIP_RESET (1 << 3) /* do not return to first slot */
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#ifndef E2END
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#define E2END 511 /* for ATMega8 */
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#endif
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#define MAX_SLOTS ((E2END+1) / sizeof(struct slot))
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#define MAX_USER_LEN 24
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#define MAX_PASS_LEN 23
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#define MAX_SERIAL_LEN 4
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/* USB vendor requests */
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#define USBRQ_VENDOR_GET_STATUS 1
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#define USBRQ_VENDOR_SET_SLOT 2
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#define USBRQ_VENDOR_SET_SERIAL 3
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#define USBRQ_VENDOR_RESET 4
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#define DEVICE_VID 0x16c0
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#define DEVICE_PID 0x05dc
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/* END of configuration */
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/**
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* A slot stores one user/password combination in EEPROM
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*/
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struct slot {
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char type;
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char options;
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char delimiter; /* \0 is also possible */
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char user[MAX_USER_LEN];
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union {
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char string[MAX_PASS_LEN];
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struct {
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char seed[8];
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uint16_t sequence;
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} otp;
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} pass;
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} __attribute__ ((packed));
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enum error {
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ERROR_SUCCESS,
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ERROR_LOCKED,
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ERROR_OVERFLOW,
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ERROR_INVALID_SLOT,
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ERROR_UNKNOW
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};
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enum mode {
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IDLE,
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EXPECT_SLOT,
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EXPECT_SERIAL,
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EXPECT_REPORT
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};
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struct status {
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uint16_t counter; /* startups since last reset/flash */
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uint16_t maxSlots;
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uint16_t maxPassLen;
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uint16_t maxUserLen;
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uint16_t maxSerialLen;
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uint8_t error;
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uint8_t mode;
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uint8_t writable;
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} __attribute__ ((packed));
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#endif /* _CONFIG_H_ */
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