From 4fea5ed998cbe8c0988eec9170e984c7e6394bd7 Mon Sep 17 00:00:00 2001
From: Steffen Vogel <info@steffenvogel.de>
Date: Fri, 9 Mar 2012 16:12:51 +0100
Subject: [PATCH] added common compile time config

---
 config.h | 89 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 89 insertions(+)
 create mode 100644 config.h

diff --git a/config.h b/config.h
new file mode 100644
index 0000000..40e6d17
--- /dev/null
+++ b/config.h
@@ -0,0 +1,89 @@
+
+#ifndef _CONFIG_H_
+#define _CONFIG_H_
+
+/* START of configuration */
+
+#define DEBUG_LEVEL		0
+#define ENCRYPTION		1
+#define WRITE_PROTECTION	1
+#define BTN_LONG_PRESS		40
+
+/* slot types */
+#define SLOT_EMPTY		0 /* an empty slot */
+#define SLOT_STRING		1 /* a stored password as string */
+#define SLOT_OTP		2 /* a stored sequence and seed for one time passwords */
+#define SLOT_RANDOM		3 /* password gets generated each time */
+#define SLOT_GENERATE 		4 /* password will be generated on key during configuration */
+
+/* the most significant bits of slot.type have a special meaning */
+#define SKIP_USER		(1 << 0) /* just print the password */
+#define SKIP_RETURN		(1 << 1) /* omit trailing newline after password */
+#define SKIP_DELIMITER		(1 << 2) /* omit delimiter between username and password */
+#define SKIP_RESET		(1 << 3) /* do not return to first slot */
+
+#ifndef E2END
+#define E2END 511 /* for ATMega8 */
+#endif
+
+#define MAX_SLOTS		((E2END+1) / sizeof(struct slot))
+#define MAX_USER_LEN		24
+#define MAX_PASS_LEN		23
+#define MAX_SERIAL_LEN		4
+
+/* USB vendor requests */
+#define USBRQ_VENDOR_GET_STATUS	1
+#define USBRQ_VENDOR_SET_SLOT	2
+#define USBRQ_VENDOR_SET_SERIAL	3
+#define USBRQ_VENDOR_RESET	4
+
+#define DEVICE_VID		0x16c0
+#define DEVICE_PID		0x05dc
+
+/* END of configuration */
+
+/**
+ * A slot stores one user/password combination in EEPROM
+ */
+struct slot {
+	char type;
+	char options;
+	char delimiter; /* \0 is also possible */
+	char user[MAX_USER_LEN];
+	union {
+		char string[MAX_PASS_LEN];
+		struct {
+			char seed[8];
+			uint16_t sequence;
+		} otp;
+	} pass;
+} __attribute__ ((packed));
+
+enum error {
+	ERROR_SUCCESS,
+	ERROR_LOCKED,
+	ERROR_OVERFLOW,
+	ERROR_INVALID_SLOT,
+	ERROR_UNKNOW
+};
+
+enum mode {
+	IDLE,
+	EXPECT_SLOT,
+	EXPECT_SERIAL,
+	EXPECT_REPORT
+};
+
+struct status {
+	uint16_t counter; /* startups since last reset/flash */
+	uint16_t maxSlots;
+	uint16_t maxPassLen;
+	uint16_t maxUserLen;
+	uint16_t maxSerialLen;
+
+	uint8_t error;
+	uint8_t mode;
+	uint8_t writable;
+} __attribute__ ((packed));
+
+#endif /* _CONFIG_H_ */