+#if OPENSSL_VERSION_NUMBER < 0x10100000L
+static inline HMAC_CTX *HMAC_CTX_new(void)
+{
+ HMAC_CTX *ctx = OPENSSL_malloc(sizeof(*ctx));
+
+ if (ctx != NULL)
+ HMAC_CTX_init(ctx);
+ return ctx;
+}
+
+static inline void HMAC_CTX_free(HMAC_CTX *ctx)
+{
+ if (ctx != NULL) {
+ HMAC_CTX_cleanup(ctx);
+ OPENSSL_cleanse(ctx, sizeof(*ctx));
+ OPENSSL_free(ctx);
+ }
+}
+static inline void DH_get0_pqg(const DH *dh,
+ const BIGNUM **p, const BIGNUM **q,
+ const BIGNUM **g)
+{
+ if (p != NULL)
+ *p = dh->p;
+ if (q != NULL)
+ *q = dh->q;
+ if (g != NULL)
+ *g = dh->g;
+}
+
+static inline int DH_set0_pqg(DH *dh, BIGNUM *p, BIGNUM *q, BIGNUM *g)
+{
+ /* If the fields p and g in dh are NULL, the corresponding input
+ * parameters MUST be non-NULL. q may remain NULL.
+ */
+ if ((dh->p == NULL && p == NULL)
+ || (dh->g == NULL && g == NULL))
+ return 0;
+
+ if (p != NULL) {
+ BN_free(dh->p);
+ dh->p = p;
+ }
+ if (q != NULL) {
+ BN_free(dh->q);
+ dh->q = q;
+ }
+ if (g != NULL) {
+ BN_free(dh->g);
+ dh->g = g;
+ }
+
+ if (q != NULL)
+ dh->length = BN_num_bits(q);
+
+ return 1;
+}
+
+static inline void DH_get0_key(const DH *dh, const BIGNUM **pub_key,
+ const BIGNUM **priv_key)
+{
+ if (pub_key != NULL)
+ *pub_key = dh->pub_key;
+ if (priv_key != NULL)
+ *priv_key = dh->priv_key;
+}
+#endif
+