#define HMAC_cleanup(ctx) HMAC_CTX_cleanup(ctx) /* deprecated */
-void HMAC_Init(HMAC_CTX *ctx, const void *key, size_t len,
+int HMAC_Init(HMAC_CTX *ctx, const void *key, size_t len,
const EVP_MD *md); /* deprecated */
-void HMAC_Init_ex(HMAC_CTX *ctx, const void *key, size_t len,
+int HMAC_Init_ex(HMAC_CTX *ctx, const void *key, size_t len,
const EVP_MD *md, ENGINE *impl);
-void HMAC_Update(HMAC_CTX *ctx, const unsigned char *data, size_t len);
-void HMAC_Final(HMAC_CTX *ctx, unsigned char *md, unsigned int *len);
+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);
unsigned char *HMAC(const EVP_MD *evp_md, const void *key, size_t key_len,
const unsigned char *d, size_t n, unsigned char *md,
unsigned int *md_len);
-void HMAC_CTX_copy(HMAC_CTX *dctx, HMAC_CTX *sctx);
+int HMAC_CTX_copy(HMAC_CTX *dctx, HMAC_CTX *sctx);
#ifdef __cplusplus