wbrawner/openssl
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Error out immediately on empty ciphers list.

Browse source 
A 0-length ciphers list is never permitted. The old code only used to
reject an empty ciphers list for connections with a session ID. It
would later error out on a NULL structure, so this change just moves
the alert closer to the problem source.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit 3ae91cfb32)
This commit is contained in:
Emilia Kasper 2015-04-15 14:18:55 +02:00
parent 5613feaacc
commit e697a4c3d7
1 changed files with 6 additions and 7 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

13
ssl/s3_srvr.c
View file

@ -1125,8 +1125,8 @@ int ssl3_get_client_hello(SSL *s)
goto f_err;
}
n2s(p, i);
if ((i == 0) && (j != 0)) {
/* we need a cipher if we are not resuming a session */
if (i == 0) {
al = SSL_AD_ILLEGAL_PARAMETER;
SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_NO_CIPHERS_SPECIFIED);
goto f_err;
@ -1139,14 +1139,13 @@ int ssl3_get_client_hello(SSL *s)
SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_LENGTH_MISMATCH);
goto f_err;
}
if ((i > 0) && (ssl_bytes_to_cipher_list(s, p, i, &(ciphers))
== NULL)) {
if (ssl_bytes_to_cipher_list(s, p, i, &(ciphers)) == NULL) {
goto err;
}
p += i;
/* If it is a hit, check that the cipher is in the list */
if ((s->hit) && (i > 0)) {
if (s->hit) {
j = 0;
id = s->session->cipher->id;
@ -1375,8 +1374,8 @@ int ssl3_get_client_hello(SSL *s)
sk_SSL_CIPHER_free(s->session->ciphers);
s->session->ciphers = ciphers;
if (ciphers == NULL) {
al = SSL_AD_ILLEGAL_PARAMETER;
SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_NO_CIPHERS_PASSED);
al = SSL_AD_INTERNAL_ERROR;
SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
goto f_err;
}
ciphers = NULL;