diff options
Diffstat (limited to 'source3/libsmb/credentials.c')
| -rw-r--r-- | source3/libsmb/credentials.c | 25 |
1 files changed, 19 insertions, 6 deletions
diff --git a/source3/libsmb/credentials.c b/source3/libsmb/credentials.c index 795c30d12d..5026f513ab 100644 --- a/source3/libsmb/credentials.c +++ b/source3/libsmb/credentials.c @@ -183,17 +183,30 @@ static void creds_reseed(struct dcinfo *dc) BOOL creds_server_step(struct dcinfo *dc, const DOM_CRED *received_cred, DOM_CRED *cred_out) { - dc->sequence = received_cred->timestamp.time; + BOOL ret; + struct dcinfo tmp_dc = *dc; - creds_step(dc); + /* Do all operations on a temporary copy of the dc, + which we throw away if the checks fail. */ + + tmp_dc.sequence = received_cred->timestamp.time; + + creds_step(&tmp_dc); /* Create the outgoing credentials */ - cred_out->timestamp.time = dc->sequence + 1; - cred_out->challenge = dc->srv_chal; + cred_out->timestamp.time = tmp_dc.sequence + 1; + cred_out->challenge = tmp_dc.srv_chal; - creds_reseed(dc); + creds_reseed(&tmp_dc); - return creds_server_check(dc, &received_cred->challenge); + ret = creds_server_check(&tmp_dc, &received_cred->challenge); + if (!ret) { + return False; + } + + /* creds step succeeded - replace the current creds. */ + *dc = tmp_dc; + return True; } /**************************************************************************** |