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Fix overlapping sequence number error.

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wolfSSL wants to use the same sequence number for the ServerHello as the ClientHello. This is an issue when this sequence number is already taken.
This commit is contained in:
Juliusz Sosinowicz
2020-11-11 15:35:05 +01:00
parent 68209f91fb
commit d49038ae24
1 changed files with 8 additions and 4 deletions
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12
src/internal.c
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@ -24894,10 +24894,14 @@ static int DoSessionTicket(WOLFSSL* ssl, const byte* input, word32* inOutIdx,
sendSz = length + HANDSHAKE_HEADER_SZ + RECORD_HEADER_SZ;
#ifdef WOLFSSL_DTLS
if (ssl->options.dtls) {
/* Server Hello should use the same sequence number as the
* Client Hello. */
ssl->keys.dtls_sequence_number_hi = ssl->keys.curSeq_hi;
ssl->keys.dtls_sequence_number_lo = ssl->keys.curSeq_lo;
if (((ssl->keys.dtls_sequence_number_hi == ssl->keys.curSeq_hi &&
ssl->keys.dtls_sequence_number_lo < ssl->keys.curSeq_lo) ||
(ssl->keys.dtls_sequence_number_hi < ssl->keys.curSeq_hi))) {
/* Server Hello should use the same sequence number as the
* Client Hello if available. */
ssl->keys.dtls_sequence_number_hi = ssl->keys.curSeq_hi;
ssl->keys.dtls_sequence_number_lo = ssl->keys.curSeq_lo;
}
idx += DTLS_RECORD_EXTRA + DTLS_HANDSHAKE_EXTRA;
sendSz += DTLS_RECORD_EXTRA + DTLS_HANDSHAKE_EXTRA;
}