void padblock(unsigned char *buf, size_t *buflen, size_t blocksize);
int unpadblock(unsigned char *buf, size_t *buflen, size_t blocksize);
-int tlsunpadblock(OPENSSL_CTX *libctx, unsigned int tlsversion,
+int tlsunpadblock(OSSL_LIB_CTX *libctx, unsigned int tlsversion,
unsigned char *buf, size_t *buflen, size_t blocksize,
unsigned char **mac, int *alloced, size_t macsize, int aead);