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sanity check in function GetInputData and when shrinking buffer

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This commit is contained in:
Jacob Barthelmeh
2016-06-30 13:42:38 -06:00
parent cf522314ce
commit 8bba628f3f
1 changed files with 6 additions and 4 deletions
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10
src/internal.c
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@ -4814,7 +4814,7 @@ void ShrinkInputBuffer(WOLFSSL* ssl, int forcedFree)
WOLFSSL_MSG("Shrinking input buffer\n");
if (!forcedFree && usedLength)
if (!forcedFree && usedLength > 0)
XMEMCPY(ssl->buffers.inputBuffer.staticBuffer,
ssl->buffers.inputBuffer.buffer + ssl->buffers.inputBuffer.idx,
usedLength);
@ -8902,14 +8902,16 @@ static int GetInputData(WOLFSSL *ssl, word32 size)
}
#endif
/* check that no lengths or size values are negative */
if (usedLength < 0 || maxLength < 0 || inSz <= 0) {
return BUFFER_ERROR;
}
if (inSz > maxLength) {
if (GrowInputBuffer(ssl, size + dtlsExtra, usedLength) < 0)
return MEMORY_E;
}
if (inSz <= 0)
return BUFFER_ERROR;
/* Put buffer data at start if not there */
if (usedLength > 0 && ssl->buffers.inputBuffer.idx != 0)
XMEMMOVE(ssl->buffers.inputBuffer.buffer,