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Add tests to generate more random than MBEDTLS_CTR_DRBG_MAX_REQUEST

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Add tests that call psa_generate_random() (possibly via
psa_generate_key()) with a size that's larger than
MBEDTLS_CTR_DRBG_MAX_REQUEST. This causes psa_generate_random() to
fail because it calls mbedtls_ctr_drbg_random() without taking the
maximum request size of CTR_DRBG into account.

Non-regression test for #206
This commit is contained in:
Gilles Peskine 2019-08-07 12:08:04 +02:00
parent a6b2f60b4c
commit bdc96fd636
2 changed files with 21 additions and 0 deletions
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15
tests/suites/test_suite_psa_crypto.data
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@ -2209,6 +2209,15 @@ generate_random:19
PSA generate random: 260 bytes
generate_random:260
PSA generate random: MBEDTLS_CTR_DRBG_MAX_REQUEST bytes
generate_random:MBEDTLS_CTR_DRBG_MAX_REQUEST
PSA generate random: MBEDTLS_CTR_DRBG_MAX_REQUEST+1 bytes
generate_random:MBEDTLS_CTR_DRBG_MAX_REQUEST + 1
PSA generate random: 2*MBEDTLS_CTR_DRBG_MAX_REQUEST+1 bytes
generate_random:2 * MBEDTLS_CTR_DRBG_MAX_REQUEST + 1
PSA generate key: bad type (0)
generate_key:PSA_KEY_TYPE_NONE:128:PSA_KEY_USAGE_EXPORT:0:PSA_ERROR_NOT_SUPPORTED
@ -2227,6 +2236,12 @@ generate_key:PSA_KEY_TYPE_RAW_DATA:7:PSA_KEY_USAGE_EXPORT:0:PSA_ERROR_INVALID_AR
PSA generate key: raw data, 8 bits
generate_key:PSA_KEY_TYPE_RAW_DATA:8:PSA_KEY_USAGE_EXPORT:0:PSA_SUCCESS
PSA generate key: raw data, (MBEDTLS_CTR_DRBG_MAX_REQUEST + 1) * 8 bits
generate_key:PSA_KEY_TYPE_RAW_DATA:(MBEDTLS_CTR_DRBG_MAX_REQUEST + 1) * 8:PSA_KEY_USAGE_EXPORT:0:PSA_SUCCESS
PSA generate key: raw data, (2 * MBEDTLS_CTR_DRBG_MAX_REQUEST + 1) * 8 bits
generate_key:PSA_KEY_TYPE_RAW_DATA:(2 * MBEDTLS_CTR_DRBG_MAX_REQUEST + 1) * 8:PSA_KEY_USAGE_EXPORT:0:PSA_SUCCESS
PSA generate key: raw data, 65528 bits (ok)
depends_on:HAVE_RAM_AVAILABLE_128K
generate_key:PSA_KEY_TYPE_RAW_DATA:65528:PSA_KEY_USAGE_EXPORT:0:PSA_SUCCESS

6
tests/suites/test_suite_psa_crypto.function
View file

@ -5,6 +5,10 @@
#include "mbedtls/asn1write.h"
#include "mbedtls/oid.h"
/* For MBEDTLS_CTR_DRBG_MAX_REQUEST, knowing that psa_generate_random()
* uses mbedtls_ctr_drbg internally. */
#include "mbedtls/ctr_drbg.h"
#include "psa_crypto_helpers.h"
/* Tests that require more than 128kB of RAM plus change have this symbol
@ -14,6 +18,8 @@
* platforms. */
#define HAVE_RAM_AVAILABLE_128K
#include "psa/crypto.h"
/** An invalid export length that will never be set by psa_export_key(). */
static const size_t INVALID_EXPORT_LENGTH = ~0U;