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Fix a bug in bssl::OpenRecord.

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Checking the record type returned by the |tls_open_record| call only
makes sense if that call was successful.

Change-Id: Ib4bebd2b1198c7def513d9fba3653524c17a6e68
Reviewed-on: https://boringssl-review.googlesource.com/18884
Reviewed-by: Adam Langley <agl@google.com>
This commit is contained in:
Martin Kreichgauer 2017-08-03 12:02:34 -07:00 committed by Adam Langley
parent c90be3b143
commit 26ababbf65
1 changed files with 15 additions and 26 deletions
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41
ssl/tls_record.cc
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@ -596,44 +596,33 @@ OpenRecordResult OpenRecord(SSL *ssl, Span<uint8_t> *out,
return OpenRecordResult::kError;
}
*out = Span<uint8_t>();
*out_record_len = 0;
CBS plaintext;
uint8_t type;
size_t record_len;
const ssl_open_record_t result = tls_open_record(
ssl, &type, &plaintext, &record_len, out_alert, in.data(), in.size());
if (type != SSL3_RT_APPLICATION_DATA && type != SSL3_RT_ALERT) {
*out_alert = SSL_AD_UNEXPECTED_MESSAGE;
return OpenRecordResult::kError;
}
ssl, &type, &plaintext, out_record_len, out_alert, in.data(), in.size());
OpenRecordResult ret = OpenRecordResult::kError;
switch (result) {
case ssl_open_record_success:
ret = OpenRecordResult::kOK;
break;
if (type != SSL3_RT_APPLICATION_DATA && type != SSL3_RT_ALERT) {
*out_alert = SSL_AD_UNEXPECTED_MESSAGE;
return OpenRecordResult::kError;
}
*out = MakeSpan(
const_cast<uint8_t*>(CBS_data(&plaintext)), CBS_len(&plaintext));
return OpenRecordResult::kOK;
case ssl_open_record_discard:
ret = OpenRecordResult::kDiscard;
break;
return OpenRecordResult::kDiscard;
case ssl_open_record_partial:
ret = OpenRecordResult::kIncompleteRecord;
break;
return OpenRecordResult::kIncompleteRecord;
case ssl_open_record_close_notify:
ret = OpenRecordResult::kAlertCloseNotify;
break;
return OpenRecordResult::kAlertCloseNotify;
case ssl_open_record_fatal_alert:
ret = OpenRecordResult::kAlertFatal;
break;
return OpenRecordResult::kAlertFatal;
case ssl_open_record_error:
ret = OpenRecordResult::kError;
break;
return OpenRecordResult::kError;
}
*out =
MakeSpan(const_cast<uint8_t*>(CBS_data(&plaintext)), CBS_len(&plaintext));
*out_record_len = record_len;
return ret;
assert(false);
return OpenRecordResult::kError;
}
size_t SealRecordPrefixLen(const SSL *ssl, const size_t record_len) {