/src/botan/src/lib/utils/mem_ops.cpp
Line | Count | Source (jump to first uncovered line) |
1 | | /* |
2 | | * (C) 2017 Jack Lloyd |
3 | | * |
4 | | * Botan is released under the Simplified BSD License (see license.txt) |
5 | | */ |
6 | | |
7 | | #include <botan/mem_ops.h> |
8 | | #include <botan/internal/ct_utils.h> |
9 | | #include <cstdlib> |
10 | | #include <new> |
11 | | |
12 | | #if defined(BOTAN_HAS_LOCKING_ALLOCATOR) |
13 | | #include <botan/locking_allocator.h> |
14 | | #endif |
15 | | |
16 | | namespace Botan { |
17 | | |
18 | | BOTAN_MALLOC_FN void* allocate_memory(size_t elems, size_t elem_size) |
19 | 96.4M | { |
20 | 96.4M | if(elems == 0 || elem_size == 0) |
21 | 0 | return nullptr; |
22 | 96.4M | |
23 | | #if defined(BOTAN_HAS_LOCKING_ALLOCATOR) |
24 | | if(void* p = mlock_allocator::instance().allocate(elems, elem_size)) |
25 | | return p; |
26 | | #endif |
27 | | |
28 | 96.4M | void* ptr = std::calloc(elems, elem_size); |
29 | 96.4M | if(!ptr) |
30 | 0 | throw std::bad_alloc(); |
31 | 96.4M | return ptr; |
32 | 96.4M | } |
33 | | |
34 | | void deallocate_memory(void* p, size_t elems, size_t elem_size) |
35 | 96.4M | { |
36 | 96.4M | if(p == nullptr) |
37 | 0 | return; |
38 | 96.4M | |
39 | 96.4M | secure_scrub_memory(p, elems * elem_size); |
40 | 96.4M | |
41 | | #if defined(BOTAN_HAS_LOCKING_ALLOCATOR) |
42 | | if(mlock_allocator::instance().deallocate(p, elems, elem_size)) |
43 | | return; |
44 | | #endif |
45 | | |
46 | 96.4M | std::free(p); |
47 | 96.4M | } |
48 | | |
49 | | void initialize_allocator() |
50 | 9 | { |
51 | | #if defined(BOTAN_HAS_LOCKING_ALLOCATOR) |
52 | | mlock_allocator::instance(); |
53 | | #endif |
54 | | } |
55 | | |
56 | | uint8_t ct_compare_u8(const uint8_t x[], |
57 | | const uint8_t y[], |
58 | | size_t len) |
59 | 1.15k | { |
60 | 1.15k | volatile uint8_t difference = 0; |
61 | 1.15k | |
62 | 20.8k | for(size_t i = 0; i != len; ++i) |
63 | 19.6k | difference |= (x[i] ^ y[i]); |
64 | 1.15k | |
65 | 1.15k | return CT::Mask<uint8_t>::is_zero(difference).value(); |
66 | 1.15k | } |
67 | | |
68 | | } |