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C-Netz: Add authentication support (process only)

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No real authentication, since the algorithm and the keys inside the cards
are not known. A challenge can be specified and optionally the response
can be verified.
This commit is contained in:
Andreas Eversberg
2019-06-29 07:49:28 +02:00
parent 5d9a9b59c3
commit 13245c56f6
11 changed files with 220 additions and 76 deletions
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11
src/cnetz/cnetz.h
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@@ -33,6 +33,7 @@ enum cnetz_state {
#define F_BQ 8 /* number of not received frames at BQ state */
#define F_VHQK 16 /* number of not received frames at VHQ state during concentrated signaling */
#define F_VHQ 16 /* number of not received frames at VHQ state during distributed signaling */
#define F_ZFZ 16 /* number of not received frames at ZFZ state (guessed, no documentation avail) */
#define F_DS 16 /* number of not received frames at DS state */
#define F_RTA 16 /* number of not received frames at RTA state */
#define N_AFKT 6 /* number of release frames to send during concentrated signaling */
@@ -40,6 +41,7 @@ enum cnetz_state {
#define N 3 /* now many times we repeat a message on OgK */
#define T_VAG2 180 /* time on outgoing queue */
#define T_VAK 60 /* time on incoming queue */
#define T_AP 750 /* Time to wait for SIM card's authentication reply */
/* clear causes */
#define CNETZ_CAUSE_GASSENBESETZT 0 /* network congested */
@@ -71,9 +73,12 @@ typedef struct cnetz {
int de_emphasis; /* use de_emphasis by this instance */
emphasis_t estate;
/* cell config */
/* call config */
int ms_power; /* power level of MS, use 0..3 */
int auth; /* authentication support of the cell */
int challenge_valid; /* send authorizaton value */
uint64_t challenge; /* authorization value */
int response_valid; /* expect authorizaton response */
uint64_t response; /* authorization response */
int warteschlange; /* use queue */
int metering; /* use metering pulses in seconds 0 = off */
@@ -133,7 +138,7 @@ int cnetz_channel_by_short_name(const char *short_name);
const char *chan_type_short_name(enum cnetz_chan_type chan_type);
const char *chan_type_long_name(enum cnetz_chan_type chan_type);
int cnetz_init(void);
int cnetz_create(int kanal, enum cnetz_chan_type chan_type, const char *audiodev, int use_sdr, enum demod_type demod, int samplerate, double rx_gain, int auth, int warteschlange, int metering, double dbm0_deviation, int ms_power, int measure_speed, double clock_speed[2], int polarity, int pre_emphasis, int de_emphasis, const char *write_rx_wave, const char *write_tx_wave, const char *read_rx_wave, const char *read_tx_wave, int loopback);
int cnetz_create(int kanal, enum cnetz_chan_type chan_type, const char *audiodev, int use_sdr, enum demod_type demod, int samplerate, double rx_gain, int challenge_valid, uint64_t challenge, int response_valid, uint64_t response, int warteschlange, int metering, double dbm0_deviation, int ms_power, int measure_speed, double clock_speed[2], int polarity, int pre_emphasis, int de_emphasis, const char *write_rx_wave, const char *write_tx_wave, const char *read_rx_wave, const char *read_tx_wave, int loopback);
void cnetz_destroy(sender_t *sender);
void cnetz_go_idle(cnetz_t *cnetz);
void cnetz_sync_frame(cnetz_t *cnetz, double sync, int ts);