DTLS/SCTP struct authchunks Bug

PR: 2809

DTLS/SCTP requires DATA and FORWARD-TSN chunks to be protected with
SCTP-AUTH.  It is checked if this has been activated successfully for
the local and remote peer. Due to a bug, however, the
gauth_number_of_chunks field of the authchunks struct is missing on
FreeBSD, and was therefore not considered in the OpenSSL implementation.
This patch sets the corresponding pointer for the check correctly
whether or not this bug is present.

diff --git a/crypto/bio/bss_dgram.c b/crypto/bio/bss_dgram.c
index 7b87a043c430fbe21691a1514f0206c87a22d2e5..a20f264bfc69123436d6b3fd6efd63d257bf566a 100644 (file)
--- a/crypto/bio/bss_dgram.c
+++ b/crypto/bio/bss_dgram.c
@@ -954,8 +954,8 @@ BIO *BIO_new_dgram_sctp(int fd, int close_flag)
        memset(authchunks, 0, sizeof(sockopt_len));
        ret = getsockopt(fd, IPPROTO_SCTP, SCTP_LOCAL_AUTH_CHUNKS, authchunks, &sockopt_len);
        OPENSSL_assert(ret >= 0);
-       
-       for (p = (unsigned char*) authchunks + sizeof(sctp_assoc_t);
+
+       for (p = (unsigned char*) authchunks->gauth_chunks;
             p < (unsigned char*) authchunks + sockopt_len;
             p += sizeof(uint8_t))
                {
@@ -1245,7 +1245,7 @@ static int dgram_sctp_read(BIO *b, char *out, int outl)
                        ii = getsockopt(b->num, IPPROTO_SCTP, SCTP_PEER_AUTH_CHUNKS, authchunks, &optlen);
                        OPENSSL_assert(ii >= 0);
 
-                       for (p = (unsigned char*) authchunks + sizeof(sctp_assoc_t);
+                       for (p = (unsigned char*) authchunks->gauth_chunks;
                                 p < (unsigned char*) authchunks + optlen;
                                 p += sizeof(uint8_t))
                                {