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-rw-r--r--ssl/d1_clnt.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/ssl/d1_clnt.c b/ssl/d1_clnt.c
index d8cf92686c..0fea8659ac 100644
--- a/ssl/d1_clnt.c
+++ b/ssl/d1_clnt.c
@@ -1548,6 +1548,12 @@ int dtls1_send_client_certificate(SSL *s)
s->state=SSL3_ST_CW_CERT_D;
l=dtls1_output_cert_chain(s,
(s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
+ if (!l)
+ {
+ SSLerr(SSL_F_DTLS1_SEND_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR);
+ ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
+ return 0;
+ }
s->init_num=(int)l;
s->init_off=0;