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-rw-r--r--myproposal.h14
1 files changed, 13 insertions, 1 deletions
diff --git a/myproposal.h b/myproposal.h
index cc94a8ed..43c54020 100644
--- a/myproposal.h
+++ b/myproposal.h
@@ -23,11 +23,23 @@
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
-#define KEX_DEFAULT_KEX \
+
+#include <openssl/opensslv.h>
+
+/* Old OpenSSL doesn't support what we need for DHGEX-sha256 */
+#if OPENSSL_VERSION_NUMBER < 0x00907000L
+# define KEX_DEFAULT_KEX \
+ "diffie-hellman-group-exchange-sha1," \
+ "diffie-hellman-group14-sha1," \
+ "diffie-hellman-group1-sha1"
+#else
+# define KEX_DEFAULT_KEX \
"diffie-hellman-group-exchange-sha256," \
"diffie-hellman-group-exchange-sha1," \
"diffie-hellman-group14-sha1," \
"diffie-hellman-group1-sha1"
+#endif
+
#define KEX_DEFAULT_PK_ALG "ssh-rsa,ssh-dss"
#define KEX_DEFAULT_ENCRYPT \
"aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc," \