-void HMAC_Init(HMAC_CTX *ctx, const void *key, int len,
- const EVP_MD *md);
-void HMAC_Update(HMAC_CTX *ctx, const unsigned char *data, int len);
-void HMAC_Final(HMAC_CTX *ctx, unsigned char *md, unsigned int *len);
-void HMAC_cleanup(HMAC_CTX *ctx);
+void HMAC_CTX_init(HMAC_CTX *ctx);
+void HMAC_CTX_cleanup(HMAC_CTX *ctx);
+
+#define HMAC_cleanup(ctx) HMAC_CTX_cleanup(ctx) /* deprecated */
+
+int HMAC_Init(HMAC_CTX *ctx, const void *key, int len,
+ const EVP_MD *md); /* deprecated */
+int HMAC_Init_ex(HMAC_CTX *ctx, const void *key, int len,
+ const EVP_MD *md, ENGINE *impl);
+int HMAC_Update(HMAC_CTX *ctx, const unsigned char *data, size_t len);
+int HMAC_Final(HMAC_CTX *ctx, unsigned char *md, unsigned int *len);