text: /*
   * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
   *
   * Licensed under the Apache License, Version 2.0 (the "License").
   * You may not use this file except in compliance with the License.
   * A copy of the License is located at
   *
   *  http://aws.amazon.com/apache2.0
   *
   * or in the "license" file accompanying this file. This file is distributed
   * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
   * express or implied. See the License for the specific language governing
   * permissions and limitations under the License.
   */
  
  #include "api/s2n.h"
  #include "utils/s2n_blob.h"
  
  #include <assert.h>
  #include <cbmc_proof/cbmc_utils.h>
  #include <cbmc_proof/make_common_datastructures.h>
  #include <cbmc_proof/proof_allocators.h>
  
  void s2n_free_harness() {
      struct s2n_blob *blob = cbmc_allocate_s2n_blob();
  
      __CPROVER_assume(s2n_blob_is_valid( blob ));
  
      /* Non-deterministically set initialized (in s2n_mem) to true. */
      if(nondet_bool()) {
          s2n_mem_init();
      }
  
      struct s2n_blob old_blob = *blob;
  
      if (s2n_free(blob) == S2N_SUCCESS) {
          /* If the call worked, assert all bytes in the blob struct
             are zero */
          assert_all_zeroes(blob, sizeof(*blob));
      }
  
  #pragma CPROVER check push
  #pragma CPROVER check disable "pointer"
      /* Regardless of the result of s2n_free, verify that the
         data pointed to in the blob was zeroed */
      if (old_blob.size > 0 && old_blob.data != NULL) {
          size_t i;
          __CPROVER_assume(i < old_blob.size);
          assert(old_blob.data[i] == 0);
      }
  #pragma CPROVER check pop
  
  }
  