38 lines
866 B
C
38 lines
866 B
C
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#include <rtthread.h>
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#include <hw_rng.h>
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#define DBG_TAG "libhydrogen"
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#define DBG_LVL DBG_LOG
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#include <rtdbg.h>
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static int
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hydrogen_init(void) {
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if (hydro_init() != 0) {
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abort();
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}
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LOG_I("libhydrogen initialized");
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return 0;
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}
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INIT_APP_EXPORT(hydrogen_init);
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static int
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hydro_random_init(void)
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{
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const char ctx[hydro_hash_CONTEXTBYTES] = { 'h', 'y', 'd', 'r', 'o', 'P', 'R', 'G' };
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hydro_hash_state st;
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uint16_t ebits = 0;
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hydro_hash_init(&st, ctx, NULL);
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while (ebits < 256) {
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uint32_t r = rt_hwcrypto_rng_update();
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hydro_hash_update(&st, (const uint32_t *) &r, sizeof r);
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ebits += 32;
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}
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hydro_hash_final(&st, hydro_random_context.state, sizeof hydro_random_context.state);
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hydro_random_context.counter = ~LOAD64_LE(hydro_random_context.state);
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return 0;
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}
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