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Fix overlapping sequence number error. 

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.
pull/3485/head
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;
}