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| 1 /* |
| 2 * Copyright (c) 2014 The Native Client Authors. All rights reserved. |
| 3 * Use of this source code is governed by a BSD-style license that can be |
| 4 * found in the LICENSE file. |
| 5 */ |
| 6 |
| 7 /* |
| 8 * These are simple unit tests which exercise the conversion between trusted |
| 9 * and untrusted pointers in MinSFI. |
| 10 */ |
| 11 |
| 12 /* |
| 13 * Tell the minsfi_ptr.h header to generate code which returns a magic value |
| 14 * if an error is detected, rather than abort. |
| 15 */ |
| 16 #define MINSFI_PTR_CONVERSION_TEST |
| 17 |
| 18 #include "native_client/src/include/minsfi_ptr.h" |
| 19 #include "native_client/src/include/nacl_assert.h" |
| 20 |
| 21 static MinsfiSandbox sb; |
| 22 static sfiptr_t untrusted_ptr; |
| 23 static char *native_ptr; |
| 24 |
| 25 void test_from_ptr_masks_pointer(void) { |
| 26 sb.mem_base = (char*) 0x00000000; |
| 27 sb.ptr_mask = (sfiptr_t) 0x0000FFFF; |
| 28 |
| 29 untrusted_ptr = (sfiptr_t) 0xABCDEF12; |
| 30 native_ptr = (char*) 0x0000EF12; |
| 31 |
| 32 ASSERT_EQ(native_ptr, FromMinsfiPtr(untrusted_ptr, &sb)); |
| 33 } |
| 34 |
| 35 void test_from_ptr_adds_base(void) { |
| 36 sb.mem_base = (char*) 0xABCD1000; |
| 37 sb.ptr_mask = (sfiptr_t) 0xFFFFFFFF; |
| 38 |
| 39 untrusted_ptr = (sfiptr_t) 0x00123456; |
| 40 native_ptr = (char*) 0xABDF4456; |
| 41 |
| 42 ASSERT_EQ(native_ptr, FromMinsfiPtr(untrusted_ptr, &sb)); |
| 43 } |
| 44 |
| 45 void test_to_ptr_subtracts_base(void) { |
| 46 sb.mem_base = (char*) 0x11111000; |
| 47 sb.ptr_mask = (sfiptr_t) 0xFFFFFFFF; |
| 48 |
| 49 native_ptr = (char*) 0x11234567; |
| 50 untrusted_ptr = (sfiptr_t) 0x00123567; |
| 51 |
| 52 ASSERT_EQ(untrusted_ptr, ToMinsfiPtr(native_ptr, &sb)); |
| 53 } |
| 54 |
| 55 void test_to_ptr_checks_lower_bound(void) { |
| 56 sb.mem_base = (char*) 0x11111000; |
| 57 sb.ptr_mask = (sfiptr_t) 0xFFFFFFFF; |
| 58 |
| 59 /* last rejected pointer */ |
| 60 native_ptr = (char*) 0x11110FFF; |
| 61 untrusted_ptr = (sfiptr_t) 0xCAFEBABE; /* mock error code */ |
| 62 |
| 63 ASSERT_EQ(untrusted_ptr, ToMinsfiPtr(native_ptr, &sb)); |
| 64 |
| 65 /* first accepted pointer */ |
| 66 native_ptr = (char*) 0x11111000; |
| 67 untrusted_ptr = (sfiptr_t) 0x00000000; |
| 68 |
| 69 ASSERT_EQ(untrusted_ptr, ToMinsfiPtr(native_ptr, &sb)); |
| 70 } |
| 71 |
| 72 void test_to_ptr_checks_upper_bound(void) { |
| 73 sb.mem_base = (char*) 0x11110000; |
| 74 sb.ptr_mask = (sfiptr_t) 0x0000FFFF; |
| 75 |
| 76 /* last accepted pointer */ |
| 77 native_ptr = (char*) 0x1111FFFF; |
| 78 untrusted_ptr = (sfiptr_t) 0x0000FFFF; |
| 79 |
| 80 ASSERT_EQ(untrusted_ptr, ToMinsfiPtr(native_ptr, &sb)); |
| 81 |
| 82 /* first rejected pointer */ |
| 83 native_ptr = (char*) 0x11120000; |
| 84 untrusted_ptr = (sfiptr_t) 0xCAFEBABE; /* mock error code */ |
| 85 |
| 86 ASSERT_EQ(untrusted_ptr, ToMinsfiPtr(native_ptr, &sb)); |
| 87 } |
| 88 |
| 89 int main(void) { |
| 90 test_from_ptr_masks_pointer(); |
| 91 test_from_ptr_adds_base(); |
| 92 test_to_ptr_subtracts_base(); |
| 93 test_to_ptr_checks_lower_bound(); |
| 94 test_to_ptr_checks_upper_bound(); |
| 95 return 0; |
| 96 } |
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