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Added a major refactoring to include Emulated interface.

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It works in combination with virtualsmarcard module (vpcd). It properly installed, it creates a virtual reader that can be interfaced via PCSC+vcpd. At user app level, it has no difference of having a physical smart card.

At this moment, it only works emulating a CCID interface.

Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>
This commit is contained in:
Pol Henarejos
2023-01-09 18:06:21 +01:00
parent 2d511df5d8
commit 4919eb980f
24 changed files with 617 additions and 141 deletions
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41
src/rng/hwrng.c
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@@ -18,28 +18,39 @@
#include <stdint.h>
#include <string.h>
#include <stdio.h>
#ifndef ENABLE_EMULATION
#include "pico/stdlib.h"
#include "hwrng.h"
#include "hardware/structs/rosc.h"
#include "hardware/gpio.h"
#include "hardware/adc.h"
#include "pico/unique_id.h"
#include "bsp/board.h"
#include "pico/time.h"
static inline uint32_t board_millis(void)
{
return to_ms_since_boot(get_absolute_time());
}
#else
#include "mbedtls/entropy.h"
#include "mbedtls/ctr_drbg.h"
mbedtls_ctr_drbg_context ctr_drbg;
extern uint32_t board_millis();
#endif
void adc_start() {
#ifndef ENABLE_EMULATION
adc_init();
adc_gpio_init(27);
adc_select_input(1);
#endif
}
void adc_stop() {
}
#ifdef ENABLE_EMULATION
uint32_t adc_read() {
return 0;
}
#endif
static uint64_t random_word = 0xcbf29ce484222325;
static uint8_t ep_round = 0;
@@ -47,6 +58,12 @@ static uint8_t ep_round = 0;
static void ep_init() {
random_word = 0xcbf29ce484222325;
ep_round = 0;
#ifdef ENABLE_EMULATION
mbedtls_entropy_context entropy;
mbedtls_entropy_init( &entropy );
mbedtls_ctr_drbg_init( &ctr_drbg );
mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy, (const unsigned char *) "RANDOM_GEN", 10 );
#endif
}
/* Here, we assume a little endian architecture. */
@@ -55,6 +72,7 @@ static int ep_process () {
ep_init();
}
uint64_t word = 0x0;
#ifndef ENABLE_EMULATION
for (int n = 0; n < 64; n++) {
uint8_t bit1, bit2;
do
@@ -65,6 +83,9 @@ static int ep_process () {
} while(bit1 == bit2);
word = (word << 1) | bit1;
}
#else
mbedtls_ctr_drbg_random( &ctr_drbg, (uint8_t *)&word, sizeof( word ) );
#endif
random_word ^= word^board_millis()^adc_read();
random_word *= 0x00000100000001B3;
if (++ep_round == 8) {
@@ -87,6 +108,8 @@ struct rng_rb {
};
static void rb_init(struct rng_rb *rb, uint32_t *p, uint8_t size) {
#ifdef ENABLE_EMULATION
#endif
rb->buf = p;
rb->size = size;
rb->head = rb->tail = 0;
@@ -125,7 +148,6 @@ void *neug_task() {
if ((n = ep_process())) {
int i;
const uint32_t *vp;
vp = ep_output();
for (i = 0; i < n; i++) {
@@ -134,13 +156,10 @@ void *neug_task() {
break;
}
}
return NULL;
}
void neug_init(uint32_t *buf, uint8_t size) {
pico_unique_board_id_t unique_id;
pico_get_unique_board_id(&unique_id);
struct rng_rb *rb = &the_ring_buffer;
rb_init(rb, buf, size);
@@ -170,11 +189,15 @@ uint32_t neug_get() {
void neug_wait_full() {
struct rng_rb *rb = &the_ring_buffer;
#ifndef ENABLE_EMULATION
uint core = get_core_num();
#endif
while (!rb->full) {
#ifndef ENABLE_EMULATION
if (core == 1)
sleep_ms(1);
else
#endif
neug_task();
}
}