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don't write beyond out buffer

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orignal 2014-09-17 16:24:13 -04:00
parent 7019b6d68f
commit 9ceb9a7228
1 changed files with 4 additions and 1 deletions
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5
base64.cpp
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@ -166,18 +166,21 @@ namespace data
ps = (unsigned char *)InBuffer;
if (outCount > len) return -1;
pd = (unsigned char *)OutBuffer;
pd = OutBuffer;
auto endOfOutBuffer = OutBuffer + outCount;
for ( i = 0; i < n; i++ ){
acc_1 = iT64[*ps++];
acc_2 = iT64[*ps++];
acc_1 <<= 2;
acc_1 |= acc_2>>4;
*pd++ = acc_1;
if (pd >= endOfOutBuffer) break;
acc_2 <<= 4;
acc_1 = iT64[*ps++];
acc_2 |= acc_1 >> 2;
*pd++ = acc_2;
if (pd >= endOfOutBuffer) break;
acc_2 = iT64[*ps++];
acc_2 |= acc_1 << 6;