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loader\lottie: Fixed incorrect b64 decoding

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Image padding size should be increased by 1 for '\0'."
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Hermet Park 2023-08-11 21:07:00 +09:00 • committed by Hermet Park
parent 3601d3db3a
commit 80ce345660
1 changed files with 2 additions and 2 deletions
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4
src/loaders/lottie/tvgLottieParser.cpp
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@ -53,7 +53,7 @@ static void _decodeB64(const uint8_t* input, const size_t len, Array<char>& outp
{
int pad = len > 0 && (len % 4 || input[len - 1] == '=');
const size_t L = ((len + 3) / 4 - pad) * 4;
output.reserve(L / 4 * 3 + pad);
output.reserve(L / 4 * 3 + pad + 1);
output.data[output.reserved - 1] = '\0';
for (size_t i = 0; i < L; i += 4) {
@ -63,7 +63,6 @@ static void _decodeB64(const uint8_t* input, const size_t len, Array<char>& outp
output.push(n & 0xFF);
}
if (pad) {
if (pad > 1 ) TVGERR("LOTTIE", "b64 pad size = %d", pad);
int n = B64_INDEX[input[L]] << 18 | B64_INDEX[input[L + 1]] << 12;
output.last() = n >> 16;
if (len > L + 2 && input[L + 2] != '=') {
@ -71,6 +70,7 @@ static void _decodeB64(const uint8_t* input, const size_t len, Array<char>& outp
output.push(n >> 8 & 0xFF);
}
}
output.count = output.reserved;
}