Diff: tests/suites/test_suite_ctr_drbg.function

Revision:

0:cdf462088d13

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/suites/test_suite_ctr_drbg.function	Thu Jan 05 00:18:44 2017 +0000
@@ -0,0 +1,221 @@
+/* BEGIN_HEADER */
+#include "mbedtls/ctr_drbg.h"
+
+int test_offset_idx;
+int mbedtls_entropy_func( void *data, unsigned char *buf, size_t len )
+{
+    const unsigned char *p = (unsigned char *) data;
+    memcpy( buf, p + test_offset_idx, len );
+    test_offset_idx += len;
+    return( 0 );
+}
+/* END_HEADER */
+
+/* BEGIN_DEPENDENCIES
+ * depends_on:MBEDTLS_CTR_DRBG_C
+ * END_DEPENDENCIES
+ */
+
+/* BEGIN_CASE */
+void ctr_drbg_special_behaviours( )
+{
+    mbedtls_ctr_drbg_context ctx;
+    unsigned char output[512];
+    unsigned char additional[512];
+
+    mbedtls_ctr_drbg_init( &ctx );
+    memset( output, 0, sizeof( output ) );
+    memset( additional, 0, sizeof( additional ) );
+
+    TEST_ASSERT( mbedtls_ctr_drbg_random_with_add( &ctx,
+                        output, MBEDTLS_CTR_DRBG_MAX_REQUEST + 1,
+                        additional, 16 ) ==
+                        MBEDTLS_ERR_CTR_DRBG_REQUEST_TOO_BIG );
+    TEST_ASSERT( mbedtls_ctr_drbg_random_with_add( &ctx,
+                        output, 16,
+                        additional, MBEDTLS_CTR_DRBG_MAX_INPUT + 1 ) ==
+                        MBEDTLS_ERR_CTR_DRBG_INPUT_TOO_BIG );
+
+    TEST_ASSERT( mbedtls_ctr_drbg_reseed( &ctx, additional,
+                        MBEDTLS_CTR_DRBG_MAX_SEED_INPUT + 1 ) ==
+                        MBEDTLS_ERR_CTR_DRBG_INPUT_TOO_BIG );
+exit:
+    mbedtls_ctr_drbg_free( &ctx );
+}
+/* END_CASE */
+
+/* BEGIN_CASE */
+void ctr_drbg_validate_pr( char *add_init_string, char *entropy_string,
+                           char *add1_string, char *add2_string,
+                           char *result_str )
+{
+    unsigned char entropy[512];
+    unsigned char add_init[512];
+    unsigned char add1[512];
+    unsigned char add2[512];
+    mbedtls_ctr_drbg_context ctx;
+    unsigned char buf[512];
+    unsigned char output_str[512];
+    int add_init_len, add1_len, add2_len;
+
+    mbedtls_ctr_drbg_init( &ctx );
+    memset( output_str, 0, 512 );
+
+    unhexify( entropy, entropy_string );
+    add_init_len = unhexify( add_init, add_init_string );
+    add1_len = unhexify( add1, add1_string );
+    add2_len = unhexify( add2, add2_string );
+
+    test_offset_idx = 0;
+    TEST_ASSERT( mbedtls_ctr_drbg_seed_entropy_len( &ctx, mbedtls_entropy_func, entropy, add_init, add_init_len, 32 ) == 0 );
+    mbedtls_ctr_drbg_set_prediction_resistance( &ctx, MBEDTLS_CTR_DRBG_PR_ON );
+
+    TEST_ASSERT( mbedtls_ctr_drbg_random_with_add( &ctx, buf, 16, add1, add1_len ) == 0 );
+    TEST_ASSERT( mbedtls_ctr_drbg_random_with_add( &ctx, buf, 16, add2, add2_len ) == 0 );
+    hexify( output_str, buf, 16 );
+    TEST_ASSERT( strcmp( (char *) output_str, result_str ) == 0 );
+
+exit:
+    mbedtls_ctr_drbg_free( &ctx );
+}
+/* END_CASE */
+
+/* BEGIN_CASE */
+void ctr_drbg_validate_nopr( char *add_init_string, char *entropy_string,
+                             char *add1_string, char *add_reseed_string,
+                             char *add2_string, char *result_str )
+{
+    unsigned char entropy[512];
+    unsigned char add_init[512];
+    unsigned char add1[512];
+    unsigned char add_reseed[512];
+    unsigned char add2[512];
+    mbedtls_ctr_drbg_context ctx;
+    unsigned char buf[512];
+    unsigned char output_str[512];
+    int add_init_len, add1_len, add_reseed_len, add2_len;
+
+    mbedtls_ctr_drbg_init( &ctx );
+    memset( output_str, 0, 512 );
+
+    unhexify( entropy, entropy_string );
+    add_init_len = unhexify( add_init, add_init_string );
+    add1_len = unhexify( add1, add1_string );
+    add_reseed_len = unhexify( add_reseed, add_reseed_string );
+    add2_len = unhexify( add2, add2_string );
+
+    test_offset_idx = 0;
+    TEST_ASSERT( mbedtls_ctr_drbg_seed_entropy_len( &ctx, mbedtls_entropy_func, entropy, add_init, add_init_len, 32 ) == 0 );
+
+    TEST_ASSERT( mbedtls_ctr_drbg_random_with_add( &ctx, buf, 16, add1, add1_len ) == 0 );
+    TEST_ASSERT( mbedtls_ctr_drbg_reseed( &ctx, add_reseed, add_reseed_len ) == 0 );
+    TEST_ASSERT( mbedtls_ctr_drbg_random_with_add( &ctx, buf, 16, add2, add2_len ) == 0 );
+    hexify( output_str, buf, 16 );
+    TEST_ASSERT( strcmp( (char *) output_str, result_str ) == 0 );
+
+exit:
+    mbedtls_ctr_drbg_free( &ctx );
+}
+/* END_CASE */
+
+/* BEGIN_CASE */
+void ctr_drbg_entropy_usage( )
+{
+    unsigned char out[16];
+    unsigned char add[16];
+    unsigned char entropy[1024];
+    mbedtls_ctr_drbg_context ctx;
+    size_t i, reps = 10;
+    int last_idx;
+
+    mbedtls_ctr_drbg_init( &ctx );
+    test_offset_idx = 0;
+    memset( entropy, 0, sizeof( entropy ) );
+    memset( out, 0, sizeof( out ) );
+    memset( add, 0, sizeof( add ) );
+
+    /* Init must use entropy */
+    last_idx = test_offset_idx;
+    TEST_ASSERT( mbedtls_ctr_drbg_seed( &ctx, mbedtls_entropy_func, entropy, NULL, 0 ) == 0 );
+    TEST_ASSERT( last_idx < test_offset_idx );
+
+    /* By default, PR is off and reseed_interval is large,
+     * so the next few calls should not use entropy */
+    last_idx = test_offset_idx;
+    for( i = 0; i < reps; i++ )
+    {
+        TEST_ASSERT( mbedtls_ctr_drbg_random( &ctx, out, sizeof( out ) - 4 ) == 0 );
+        TEST_ASSERT( mbedtls_ctr_drbg_random_with_add( &ctx, out, sizeof( out ) - 4,
+                                                add, sizeof( add ) ) == 0 );
+    }
+    TEST_ASSERT( last_idx == test_offset_idx );
+
+    /* While at it, make sure we didn't write past the requested length */
+    TEST_ASSERT( out[sizeof( out ) - 4] == 0 );
+    TEST_ASSERT( out[sizeof( out ) - 3] == 0 );
+    TEST_ASSERT( out[sizeof( out ) - 2] == 0 );
+    TEST_ASSERT( out[sizeof( out ) - 1] == 0 );
+
+    /* Set reseed_interval to the number of calls done,
+     * so the next call should reseed */
+    mbedtls_ctr_drbg_set_reseed_interval( &ctx, 2 * reps );
+    TEST_ASSERT( mbedtls_ctr_drbg_random( &ctx, out, sizeof( out ) ) == 0 );
+    TEST_ASSERT( last_idx < test_offset_idx );
+
+    /* The new few calls should not reseed */
+    last_idx = test_offset_idx;
+    for( i = 0; i < reps / 2; i++ )
+    {
+        TEST_ASSERT( mbedtls_ctr_drbg_random( &ctx, out, sizeof( out ) ) == 0 );
+        TEST_ASSERT( mbedtls_ctr_drbg_random_with_add( &ctx, out, sizeof( out ) ,
+                                                add, sizeof( add ) ) == 0 );
+    }
+    TEST_ASSERT( last_idx == test_offset_idx );
+
+    /* Call update with too much data (sizeof entropy > MAX(_SEED)_INPUT)
+     * (just make sure it doesn't cause memory corruption) */
+    mbedtls_ctr_drbg_update( &ctx, entropy, sizeof( entropy ) );
+
+    /* Now enable PR, so the next few calls should all reseed */
+    mbedtls_ctr_drbg_set_prediction_resistance( &ctx, MBEDTLS_CTR_DRBG_PR_ON );
+    TEST_ASSERT( mbedtls_ctr_drbg_random( &ctx, out, sizeof( out ) ) == 0 );
+    TEST_ASSERT( last_idx < test_offset_idx );
+
+    /* Finally, check setting entropy_len */
+    mbedtls_ctr_drbg_set_entropy_len( &ctx, 42 );
+    last_idx = test_offset_idx;
+    TEST_ASSERT( mbedtls_ctr_drbg_random( &ctx, out, sizeof( out ) ) == 0 );
+    TEST_ASSERT( test_offset_idx - last_idx == 42 );
+
+    mbedtls_ctr_drbg_set_entropy_len( &ctx, 13 );
+    last_idx = test_offset_idx;
+    TEST_ASSERT( mbedtls_ctr_drbg_random( &ctx, out, sizeof( out ) ) == 0 );
+    TEST_ASSERT( test_offset_idx - last_idx == 13 );
+
+exit:
+    mbedtls_ctr_drbg_free( &ctx );
+}
+/* END_CASE */
+
+/* BEGIN_CASE depends_on:MBEDTLS_FS_IO */
+void ctr_drbg_seed_file( char *path, int ret )
+{
+    mbedtls_ctr_drbg_context ctx;
+
+    mbedtls_ctr_drbg_init( &ctx );
+
+    TEST_ASSERT( mbedtls_ctr_drbg_seed( &ctx, rnd_std_rand, NULL, NULL, 0 ) == 0 );
+    TEST_ASSERT( mbedtls_ctr_drbg_write_seed_file( &ctx, path ) == ret );
+    TEST_ASSERT( mbedtls_ctr_drbg_update_seed_file( &ctx, path ) == ret );
+
+exit:
+    mbedtls_ctr_drbg_free( &ctx );
+}
+/* END_CASE */
+
+/* BEGIN_CASE depends_on:MBEDTLS_SELF_TEST */
+void ctr_drbg_selftest( )
+{
+    TEST_ASSERT( mbedtls_ctr_drbg_self_test( 1 ) == 0 );
+}
+/* END_CASE */