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| /*
| * Copyright (C) 2011 The Android Open Source Project
| *
| * Licensed under the Apache License, Version 2.0 (the "License");
| * you may not use this file except in compliance with the License.
| * You may obtain a copy of the License at
| *
| * http://www.apache.org/licenses/LICENSE-2.0
| *
| * Unless required by applicable law or agreed to in writing, software
| * distributed under the License 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.
| */
|
| #ifndef ART_LIBDEXFILE_DEX_BASE64_TEST_UTIL_H_
| #define ART_LIBDEXFILE_DEX_BASE64_TEST_UTIL_H_
|
| #include <stdint.h>
| #include <stdlib.h>
|
| #include <memory>
| #include <vector>
|
| #include <android-base/logging.h>
|
| namespace art {
|
| static inline uint8_t* DecodeBase64(const char* src, size_t* dst_size) {
| static const uint8_t kBase64Map[256] = {
| 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
| 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
| 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
| 255, 255, 255, 255, 255, 255, 255, 62, 255, 255, 255, 63,
| 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 255, 255,
| 255, 254, 255, 255, 255, 0, 1, 2, 3, 4, 5, 6,
| 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,
| 19, 20, 21, 22, 23, 24, 25, 255, 255, 255, 255, 255,
| 255, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36,
| 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48,
| 49, 50, 51, 255, 255, 255, 255, 255, 255, 255, 255, 255,
| 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
| 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
| 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
| 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
| 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
| 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
| 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
| 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
| 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
| 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
| 255, 255, 255, 255
| };
|
| CHECK(dst_size != nullptr);
| std::vector<uint8_t> tmp;
| uint32_t t = 0, y = 0;
| int g = 3;
| for (size_t i = 0; src[i] != '\0'; ++i) {
| uint8_t c = kBase64Map[src[i] & 0xFF];
| if (c == 255) continue;
| // the final = symbols are read and used to trim the remaining bytes
| if (c == 254) {
| c = 0;
| // prevent g < 0 which would potentially allow an overflow later
| if (--g < 0) {
| *dst_size = 0;
| return nullptr;
| }
| } else if (g != 3) {
| // we only allow = to be at the end
| *dst_size = 0;
| return nullptr;
| }
| t = (t << 6) | c;
| if (++y == 4) {
| tmp.push_back((t >> 16) & 255);
| if (g > 1) {
| tmp.push_back((t >> 8) & 255);
| }
| if (g > 2) {
| tmp.push_back(t & 255);
| }
| y = t = 0;
| }
| }
| if (y != 0) {
| *dst_size = 0;
| return nullptr;
| }
| std::unique_ptr<uint8_t[]> dst(new uint8_t[tmp.size()]);
| *dst_size = tmp.size();
| std::copy(tmp.begin(), tmp.end(), dst.get());
| return dst.release();
| }
|
| } // namespace art
|
| #endif // ART_LIBDEXFILE_DEX_BASE64_TEST_UTIL_H_
|
|
