/* The format of "data" here doesn't seem to be documented, but appears
to be a 2-byte field with a (redundant, given the "size" arg) total length
then a sequence of one-byte size then string (not nul-term) names. The
- latter is as described in OpenSSL documentation. */
+ latter is as described in OpenSSL documentation.
+ Note that we do not get called for a match_fail, making it hard to log
+ a single bad ALPN being offered (the common case). */
+ {
+ gstring * g = NULL;
DEBUG(D_tls) debug_printf("Seen ALPN extension from client (s=%u):", size);
for (const uschar * s = data+2; s-data < size-1; s += *s + 1)
{
server_seen_alpn++;
+ g = string_append_listele_n(g, ':', s+1, *s);
DEBUG(D_tls) debug_printf(" '%.*s'", (int)*s, s+1);
}
DEBUG(D_tls) debug_printf("\n");
if (server_seen_alpn > 1)
{
+ log_write(0, LOG_MAIN, "TLS ALPN (%s) rejected", string_from_gstring(g));
DEBUG(D_tls) debug_printf("TLS: too many ALPNs presented in handshake\n");
return GNUTLS_E_NO_APPLICATION_PROTOCOL;
}
break;
+ }
#endif
}
return 0;
for (s++; (c = *s) && c != ')'; s++) g = string_catn(g, s, 1);
- tlsp->ver = string_copyn(g->s, g->ptr);
+ tlsp->ver = string_copy_from_gstring(g);
for (uschar * p = US tlsp->ver; *p; p++)
if (*p == '-') { *p = '\0'; break; } /* TLS1.0-PKIX -> TLS1.0 */
)
{
DEBUG(D_tls)
- debug_printf("TLS certificate verification failed: cert name mismatch\n");
+ debug_printf("TLS certificate verification failed: cert name mismatch (per GnuTLS)\n");
if (state->verify_requirement >= VERIFY_REQUIRED)
goto badcert;
return TRUE;