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Merge pull request #4269 from JacobBarthelmeh/PKCS7

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sanity check on pkcs7 stream amount read
This commit is contained in:
David Garske
2021-08-04 06:41:50 -07:00
committed by GitHub
parent f1377ed861 293755917e
commit 333aa9f24b
1 changed files with 5 additions and 0 deletions
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wolfcrypt/src/pkcs7.c
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@@ -8357,6 +8357,11 @@ static int wc_PKCS7_DecryptKtri(PKCS7* pkcs7, byte* in, word32 inSz,
/* @TODO getting total amount left because of GetInt call later on /* @TODO getting total amount left because of GetInt call later on
* this could be optimized to stream better */ * this could be optimized to stream better */
if (pkcs7->stream->totalRd > pkcs7->stream->maxLen) {
WOLFSSL_MSG("PKCS7 read more than expected");
ret = BUFFER_E;
break;
}
pkcs7->stream->expected = (pkcs7->stream->maxLen - pkcs7->stream->expected = (pkcs7->stream->maxLen -
pkcs7->stream->totalRd) + pkcs7->stream->length; pkcs7->stream->totalRd) + pkcs7->stream->length;
#endif #endif