diff options
Diffstat (limited to 'media/gmp-clearkey/0.1/ClearKeyBase64.cpp')
-rw-r--r-- | media/gmp-clearkey/0.1/ClearKeyBase64.cpp | 99 |
1 files changed, 0 insertions, 99 deletions
diff --git a/media/gmp-clearkey/0.1/ClearKeyBase64.cpp b/media/gmp-clearkey/0.1/ClearKeyBase64.cpp deleted file mode 100644 index c4c530a341..0000000000 --- a/media/gmp-clearkey/0.1/ClearKeyBase64.cpp +++ /dev/null @@ -1,99 +0,0 @@ -/* - * Copyright 2015, Mozilla Foundation and contributors - * - * 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. - */ - -#include "ClearKeyBase64.h" - -#include <algorithm> - -using namespace std; - -/** -* Take a base64-encoded string, convert (in-place) each character to its -* corresponding value in the [0x00, 0x3f] range, and truncate any padding. -*/ -static bool -Decode6Bit(string& aStr) -{ - for (size_t i = 0; i < aStr.length(); i++) { - if (aStr[i] >= 'A' && aStr[i] <= 'Z') { - aStr[i] -= 'A'; - } - else if (aStr[i] >= 'a' && aStr[i] <= 'z') { - aStr[i] -= 'a' - 26; - } - else if (aStr[i] >= '0' && aStr[i] <= '9') { - aStr[i] -= '0' - 52; - } - else if (aStr[i] == '-' || aStr[i] == '+') { - aStr[i] = 62; - } - else if (aStr[i] == '_' || aStr[i] == '/') { - aStr[i] = 63; - } - else { - // Truncate '=' padding at the end of the aString. - if (aStr[i] != '=') { - aStr.erase(i, string::npos); - return false; - } - aStr[i] = '\0'; - aStr.resize(i); - break; - } - } - - return true; -} - -bool -DecodeBase64(const string& aEncoded, vector<uint8_t>& aOutDecoded) -{ - if (aEncoded.empty()) { - aOutDecoded.clear(); - return true; - } - if (aEncoded.size() == 1) { - // Invalid Base64 encoding. - return false; - } - string encoded = aEncoded; - if (!Decode6Bit(encoded)) { - return false; - } - - // The number of bytes we haven't yet filled in the current byte, mod 8. - int shift = 0; - - aOutDecoded.resize((encoded.size() * 3) / 4); - vector<uint8_t>::iterator out = aOutDecoded.begin(); - for (size_t i = 0; i < encoded.length(); i++) { - if (!shift) { - *out = encoded[i] << 2; - } - else { - *out |= encoded[i] >> (6 - shift); - out++; - if (out == aOutDecoded.end()) { - // Hit last 6bit octed in encoded, which is padding and can be ignored. - break; - } - *out = encoded[i] << (shift + 2); - } - shift = (shift + 2) % 8; - } - - return true; -}
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