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Only dump session data after we have received it

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s_client was dumping session data at the end of the handshake. In TLSv1.3
we don't have session data until receipt of a NewSessionTicket message
which happens post-handshake. Therefore we delay dumping the session data
until that message has arrived if TLSv1.3 has been negotiated.

Fixes #6482

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/6590)
This commit is contained in:
Matt Caswell 2018-06-25 16:46:57 +01:00
parent 71419442a2
commit 20c0bce506
1 changed files with 39 additions and 15 deletions
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54
apps/s_client.c
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@ -844,15 +844,29 @@ static void freeandcopy(char **dest, const char *source)
*dest = OPENSSL_strdup(source);
}
static int new_session_cb(SSL *S, SSL_SESSION *sess)
static int new_session_cb(SSL *s, SSL_SESSION *sess)
{
BIO *stmp = BIO_new_file(sess_out, "w");
if (stmp == NULL) {
BIO_printf(bio_err, "Error writing session file %s\n", sess_out);
} else {
PEM_write_bio_SSL_SESSION(stmp, sess);
BIO_free(stmp);
if (sess_out != NULL) {
BIO *stmp = BIO_new_file(sess_out, "w");
if (stmp == NULL) {
BIO_printf(bio_err, "Error writing session file %s\n", sess_out);
} else {
PEM_write_bio_SSL_SESSION(stmp, sess);
BIO_free(stmp);
}
}
/*
* Session data gets dumped on connection for TLSv1.2 and below, and on
* arrival of the NewSessionTicket for TLSv1.3.
*/
if (SSL_version(s) == TLS1_3_VERSION) {
BIO_printf(bio_c_out,
"---\nPost-Handshake New Session Ticket arrived:\n");
SSL_SESSION_print(bio_c_out, sess);
BIO_printf(bio_c_out, "---\n");
}
/*
@ -1919,11 +1933,9 @@ int s_client_main(int argc, char **argv)
* come at any time. Therefore we use a callback to write out the session
* when we know about it. This approach works for < TLSv1.3 as well.
*/
if (sess_out != NULL) {
SSL_CTX_set_session_cache_mode(ctx, SSL_SESS_CACHE_CLIENT
| SSL_SESS_CACHE_NO_INTERNAL_STORE);
SSL_CTX_sess_set_new_cb(ctx, new_session_cb);
}
SSL_CTX_set_session_cache_mode(ctx, SSL_SESS_CACHE_CLIENT
| SSL_SESS_CACHE_NO_INTERNAL_STORE);
SSL_CTX_sess_set_new_cb(ctx, new_session_cb);
if (set_keylog_file(ctx, keylog_file))
goto end;
@ -3125,7 +3137,8 @@ static void print_stuff(BIO *bio, SSL *s, int full)
X509 *peer = NULL;
STACK_OF(X509) *sk;
const SSL_CIPHER *c;
int i;
int i, istls13 = (SSL_version(s) == TLS1_3_VERSION);
long verify_result;
#ifndef OPENSSL_NO_COMP
const COMP_METHOD *comp, *expansion;
#endif
@ -3282,7 +3295,7 @@ static void print_stuff(BIO *bio, SSL *s, int full)
}
#endif
if (SSL_version(s) == TLS1_3_VERSION) {
if (istls13) {
switch (SSL_get_early_data_status(s)) {
case SSL_EARLY_DATA_NOT_SENT:
BIO_printf(bio, "Early data was not sent\n");
@ -3297,9 +3310,20 @@ static void print_stuff(BIO *bio, SSL *s, int full)
break;
}
/*
* We also print the verify results when we dump session information,
* but in TLSv1.3 we may not get that right away (or at all) depending
* on when we get a NewSessionTicket. Therefore we print it now as well.
*/
verify_result = SSL_get_verify_result(s);
BIO_printf(bio, "Verify return code: %ld (%s)\n", verify_result,
X509_verify_cert_error_string(verify_result));
} else {
/* In TLSv1.3 we do this on arrival of a NewSessionTicket */
SSL_SESSION_print(bio, SSL_get_session(s));
}
SSL_SESSION_print(bio, SSL_get_session(s));
if (SSL_get_session(s) != NULL && keymatexportlabel != NULL) {
BIO_printf(bio, "Keying material exporter:\n");
BIO_printf(bio, " Label: '%s'\n", keymatexportlabel);