-/* DRBG functions implementing AES-CTR */
-int ctr_init(RAND_DRBG *drbg);
-int ctr_uninstantiate(RAND_DRBG *drbg);
-int ctr_instantiate(RAND_DRBG *drbg,
- const unsigned char *entropy, size_t entropylen,
- const unsigned char *nonce, size_t noncelen,
- const unsigned char *pers, size_t perslen);
-int ctr_reseed(RAND_DRBG *drbg,
- const unsigned char *entropy, size_t entropylen,
- const unsigned char *adin, size_t adinlen);
-int ctr_generate(RAND_DRBG *drbg,
- unsigned char *out, size_t outlen,
- const unsigned char *adin, size_t adinlen);