39 lines
732 B
C
39 lines
732 B
C
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#ifdef HAVE_DOMAIN_NAME
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#include <os.h>
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#include <os_io.h>
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#include <cx.h>
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#include "apdu_constants.h"
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#include "challenge.h"
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static uint32_t challenge;
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/**
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* Generate a new challenge from the Random Number Generator
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*/
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void roll_challenge(void) {
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challenge = cx_rng_u32();
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}
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/**
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* Get the current challenge
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*
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* @return challenge
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*/
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uint32_t get_challenge(void) {
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return challenge;
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}
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/**
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* Send back the current challenge
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*/
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void handle_get_challenge(void) {
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PRINTF("New challenge -> %u\n", get_challenge());
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U4BE_ENCODE(G_io_apdu_buffer, 0, get_challenge());
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U2BE_ENCODE(G_io_apdu_buffer, 4, APDU_RESPONSE_OK);
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io_exchange(CHANNEL_APDU | IO_RETURN_AFTER_TX, 6);
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}
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#endif // HAVE_DOMAIN_NAME
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