Definition stream_dummy (result: string) (n: nat) : option bool :=
let hex := bytesToBits (hexstring_to_Zlist result) in
if nth_ok n hex false then Some (nth n hex false)
else None.
Definition get_nonce_dummy (result: string) (_: unit) := hexstring_to_Zlist result.
Fixpoint DRBG_generate_check (state_handle: DRBG_state_handle) (internal_states: list (string * string * string * string)) (returned_bits: string) :=
match internal_states with
| [] => True
| (key, v, additional_input, entropy_input_reseed)::[] =>
let test_HMAC256_DRBG_reseed_function := HMAC256_DRBG_reseed_function 32 32 256 in
let test_HMAC256_DRBG_generate_function := HMAC256_DRBG_generate_function test_HMAC256_DRBG_reseed_function 1024 128 128 in
let key := hexstring_to_Zlist key in
let value := hexstring_to_Zlist v in
let additional_input := hexstring_to_Zlist additional_input in
let returned_bits := hexstring_to_Zlist returned_bits in
match test_HMAC256_DRBG_generate_function (stream_dummy entropy_input_reseed) state_handle 128 256 true additional_input with
| ENTROPY.success (returned_bits', ((value', key', _), _, _)) _ => listZ_eq value value' = true /\ listZ_eq key key' = true /\ listZ_eq returned_bits returned_bits' = true
| ENTROPY.error _ _ => False
end
| (key, v, additional_input, entropy_input_reseed)::tl =>
let test_HMAC256_DRBG_reseed_function := HMAC256_DRBG_reseed_function 32 32 256 in
let test_HMAC256_DRBG_generate_function := HMAC256_DRBG_generate_function test_HMAC256_DRBG_reseed_function 1024 128 128 in
let key := hexstring_to_Zlist key in
let value := hexstring_to_Zlist v in
let additional_input := hexstring_to_Zlist additional_input in
match test_HMAC256_DRBG_generate_function (stream_dummy entropy_input_reseed) state_handle 128 256 true additional_input with
| ENTROPY.success (_, ((value', key', x), y, z)) _ => listZ_eq value value' = true /\ listZ_eq key key' = true /\ DRBG_generate_check ((value', key', x), y, z) tl returned_bits
| ENTROPY.error _ _ => False
end
end.
Definition DRBG_check (entropy_input nonce key value personalization_string: string) (internal_states: list (string * string * string * string)) (returned_bits: string) :=
let key := hexstring_to_Zlist key in
let value := hexstring_to_Zlist value in
let personalization_string := hexstring_to_Zlist personalization_string in
match HMAC256_DRBG_instantiate_function 32 32 (get_nonce_dummy nonce) 256 256 true (stream_dummy entropy_input) 256 true personalization_string with
| ENTROPY.success ((value', key', x), y, z) _ => listZ_eq value value' = true /\ listZ_eq key key' = true /\ DRBG_generate_check ((value', key', x), y, z) internal_states returned_bits
| _ => False
end.
vm_compute. repeat (split;auto). Qed.

Lemma test_with_personalization0:
DRBG_check
"f7b90c797a4a376cdd9f5c435f5985e77f36ec1df1145a12072cbb2a0da378fc"
"d95202986d45896e9f4a65f2f353fa35"
"628f0d947dca7e4171940799bfbc9b61c0ec7c2555a606c75940c37c9432bad0"
"2fbafb7afd31927f8f5ee0c4fcdb27c15db4c5dda3d40bc091bfdb782561df85"
"61535c5c045e784267fd0d85f2861778fa53c8e8586af67cf5c9f21a28ebb656"
[
("b31f8c3d56139a901abc4dd953c43a3fc65cfcb7647061e4d9e2a7e31206a5f3"%string, "1ef1e9d5d8901b71c4f9cca6c68f320d5493f2fef1c71f5e58c5c83e144822f2"%string, ""%string, "130ab64f41a5d49d6a241e0260b4bb8a46a16c6ac9e234c84b5b26cdb518d459"%string);
("da8e4563d0180619c92b29c3b8dd8f3508df3e8fa844bf331cfb0b1f4205df75"%string, "4fe4168ff2aa97bdc0235b4df3eed8bd377aa3805ff6cd9445efb6e287a71e80"%string, ""%string, "f7670e817ac061ac60439be60982492000dc5da8bc6636bdac8b1cab03198dfd"%string)
]
"8df4e349f9ea43cc509ecb2b1124358cda2de1f5cc9315edca63610a413478d68b8bb49c2814c82ce571f6e0a6780fa21c4b570610ee0c04d3edb92124f580f962d741330200c19885ca716502223247b728d66fbbeb7c6cc25cfe9866b1450b346227c7663074c8b15d189f1c6edba172a53c733d67c1c69bd7aca7e62013cd"%string.