Fix missing return value checks in SCTP

There are some missing return value checks in the SCTP code. In master this
was causing a compilation failure when config'd with
"--strict-warnings sctp".

Reviewed-by: Tim Hudson <tjh@openssl.org>

diff --git a/ssl/d1_clnt.c b/ssl/d1_clnt.c
index 566c1545e7e60a24f4a1bd73c0c48f9b2d26fca0..d4116147b41f360249b43c51e7693bc09343ac1c 100644 (file)
--- a/ssl/d1_clnt.c
+++ b/ssl/d1_clnt.c
@@ -364,11 +364,15 @@ int dtls1_connect(SSL *s)
                              sizeof(DTLS1_SCTP_AUTH_LABEL),
                              DTLS1_SCTP_AUTH_LABEL);
 
-                    SSL_export_keying_material(s, sctpauthkey,
+                    if (SSL_export_keying_material(s, sctpauthkey,
                                                sizeof(sctpauthkey),
                                                labelbuffer,
                                                sizeof(labelbuffer), NULL, 0,
-                                               0);
+                                               0) <= 0) {
+                        ret = -1;
+                        s->state = SSL_ST_ERR;
+                        goto end;
+                    }
 
                     BIO_ctrl(SSL_get_wbio(s),
                              BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
@@ -493,9 +497,13 @@ int dtls1_connect(SSL *s)
             snprintf((char *)labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL),
                      DTLS1_SCTP_AUTH_LABEL);
 
-            SSL_export_keying_material(s, sctpauthkey,
+            if (SSL_export_keying_material(s, sctpauthkey,
                                        sizeof(sctpauthkey), labelbuffer,
-                                       sizeof(labelbuffer), NULL, 0, 0);
+                                       sizeof(labelbuffer), NULL, 0, 0) <= 0) {
+                ret = -1;
+                s->state = SSL_ST_ERR;
+                goto end;
+            }
 
             BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
                      sizeof(sctpauthkey), sctpauthkey);

diff --git a/ssl/d1_srvr.c b/ssl/d1_srvr.c
index 19562e15cdb96ca48462428883c253fed20338dd..555bbdfc1105cfd9d884b54ec88054c503b6dd4d 100644 (file)
--- a/ssl/d1_srvr.c
+++ b/ssl/d1_srvr.c
@@ -417,9 +417,13 @@ int dtls1_accept(SSL *s)
                 snprintf((char *)labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL),
                          DTLS1_SCTP_AUTH_LABEL);
 
-                SSL_export_keying_material(s, sctpauthkey,
-                                           sizeof(sctpauthkey), labelbuffer,
-                                           sizeof(labelbuffer), NULL, 0, 0);
+                if (SSL_export_keying_material(s, sctpauthkey,
+                        sizeof(sctpauthkey), labelbuffer,
+                        sizeof(labelbuffer), NULL, 0, 0) <= 0) {
+                    ret = -1;
+                    s->state = SSL_ST_ERR;
+                    goto end;
+                }
 
                 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
                          sizeof(sctpauthkey), sctpauthkey);
@@ -606,9 +610,13 @@ int dtls1_accept(SSL *s)
             snprintf((char *)labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL),
                      DTLS1_SCTP_AUTH_LABEL);
 
-            SSL_export_keying_material(s, sctpauthkey,
+            if (SSL_export_keying_material(s, sctpauthkey,
                                        sizeof(sctpauthkey), labelbuffer,
-                                       sizeof(labelbuffer), NULL, 0, 0);
+                                       sizeof(labelbuffer), NULL, 0, 0) <= 0) {
+                ret = -1;
+                s->state = SSL_ST_ERR;
+                goto end;
+            }
 
             BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
                      sizeof(sctpauthkey), sctpauthkey);