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Implement MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG

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Implement support for MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG.

For test purposes, write an implementation that uses libc rand().

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine 2020-11-13 18:47:18 +01:00
parent 1c49f1ac46
commit 4fc21fdeb6
6 changed files with 97 additions and 5 deletions
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16
tests/src/psa_crypto_helpers.c
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@ -27,4 +27,20 @@
#include <psa/crypto.h>
#if defined(MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG)
#include <test/random.h>
psa_status_t mbedtls_psa_external_get_random(
mbedtls_psa_external_random_context_t *context,
uint8_t *output, size_t output_size, size_t *output_length )
{
/* This implementation is for test purposes only!
* Use the libc non-cryptographic random generator. */
(void) context;
mbedtls_test_rnd_std_rand( NULL, output, output_size );
*output_length = output_size;
return( PSA_SUCCESS );
}
#endif /* MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG */
#endif /* MBEDTLS_PSA_CRYPTO_C */