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Merge pull request #9872 from rojer/tls_hs_defrag_in

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Defragment incoming TLS handshake messages
This commit is contained in:
Manuel Pégourié-Gonnard
2025-02-24 09:28:11 +01:00
committed by GitHub
parent 03e704018a dd14c0a11e
commit 28f8e205eb
6 changed files with 110 additions and 41 deletions
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22
library/ssl_tls12_server.c
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@@ -1015,28 +1015,6 @@ read_record_header:
MBEDTLS_SSL_DEBUG_MSG(1, ("bad client hello message"));
return MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE;
}
{
size_t handshake_len = MBEDTLS_GET_UINT24_BE(buf, 1);
MBEDTLS_SSL_DEBUG_MSG(3, ("client hello v3, handshake len.: %u",
(unsigned) handshake_len));
/* The record layer has a record size limit of 2^14 - 1 and
* fragmentation is not supported, so buf[1] should be zero. */
if (buf[1] != 0) {
MBEDTLS_SSL_DEBUG_MSG(1, ("bad client hello message: %u != 0",
(unsigned) buf[1]));
return MBEDTLS_ERR_SSL_DECODE_ERROR;
}
/* We don't support fragmentation of ClientHello (yet?) */
if (msg_len != mbedtls_ssl_hs_hdr_len(ssl) + handshake_len) {
MBEDTLS_SSL_DEBUG_MSG(1, ("bad client hello message: %u != %u + %u",
(unsigned) msg_len,
(unsigned) mbedtls_ssl_hs_hdr_len(ssl),
(unsigned) handshake_len));
return MBEDTLS_ERR_SSL_DECODE_ERROR;
}
}
#if defined(MBEDTLS_SSL_PROTO_DTLS)
if (ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM) {