Add backwards compatibility to OpenSSL < 1.1.0.

common/ssl_calls.c

@@ -247,7 +247,12 @@ ssl_hmac_info_create(void)
 {
     HMAC_CTX *hmac_ctx;
 
+#if OPENSSL_VERSION_NUMBER >= 0x10100000L
     hmac_ctx = HMAC_CTX_new();
+#else
+    hmac_ctx = (HMAC_CTX *) g_malloc(sizeof(HMAC_CTX), 1);
+    HMAC_CTX_init(hmac_ctx);
+#endif
     return hmac_ctx;
 }
 
@@ -260,7 +265,12 @@ ssl_hmac_info_delete(void *hmac)
     hmac_ctx = (HMAC_CTX *) hmac;
     if (hmac_ctx != 0)
     {
+#if OPENSSL_VERSION_NUMBER >= 0x10100000L
         HMAC_CTX_free(hmac_ctx);
+#else
+        HMAC_CTX_cleanup(hmac_ctx);
+        g_free(hmac_ctx);
+#endif
     }
 }
 
@@ -491,7 +501,12 @@ ssl_gen_key_xrdp1(int key_size_in_bits, char *exp, int exp_len,
 
     const BIGNUM *n;
     const BIGNUM *d;
+#if OPENSSL_VERSION_NUMBER >= 0x10100000L
     RSA_get0_key(my_key, &n, NULL, &d);
+#else
+    n = my_key->n;
+    d = my_key->d;
+#endif
 
     if (error == 0)
     {