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src/internal.c: in SendServerKeyExchange() case diffie_hellman_kea, #ifdef HAVE_SECURE_RENEGOTIATION, enlarge buffers.serverDH_Pub.buffer to accomodate larger new key replacing smaller old key, whether or not ssl->namedGroup is set (copy-paste of existing in !ssl->namedGroup path).

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Daniel Pouzzner
2021-09-01 14:46:48 -05:00
parent 67db7b7f32
commit b93a18b34e
1 changed files with 21 additions and 0 deletions
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21
src/internal.c
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@ -26952,6 +26952,27 @@ static int DoSessionTicket(WOLFSSL* ssl, const byte* input, word32* inOutIdx,
ssl->options.dhKeyTested = 1; ssl->options.dhKeyTested = 1;
#endif #endif
#ifdef HAVE_SECURE_RENEGOTIATION
/* Check that the DH public key buffer is large
* enough to hold the key. This may occur on a
* renegotiation when the key generated in the
* initial handshake is shorter than the key
* generated in the renegotiation. */
if (ssl->buffers.serverDH_Pub.length <
ssl->buffers.serverDH_P.length) {
byte* tmp = (byte*)XREALLOC(
ssl->buffers.serverDH_Pub.buffer,
ssl->buffers.serverDH_P.length +
OPAQUE16_LEN,
ssl->heap, DYNAMIC_TYPE_PUBLIC_KEY);
if (tmp == NULL)
ERROR_OUT(MEMORY_E, exit_sske);
ssl->buffers.serverDH_Pub.buffer = tmp;
ssl->buffers.serverDH_Pub.length =
ssl->buffers.serverDH_P.length + OPAQUE16_LEN;
}
#endif
ret = DhGenKeyPair(ssl, ssl->buffers.serverDH_Key, ret = DhGenKeyPair(ssl, ssl->buffers.serverDH_Key,
ssl->buffers.serverDH_Priv.buffer, ssl->buffers.serverDH_Priv.buffer,
(word32*)&ssl->buffers.serverDH_Priv.length, (word32*)&ssl->buffers.serverDH_Priv.length,