lua use resty.aes Encrypted hex result diff from c++ use openssl

the same key and the same mesg, but the result is different, why?
lua:
local key = "1"
local mesg = "2"

local aes_256_cbc_sha1x5 = aes:new(key, salt, aes.cipher(256,"cbc"), aes.hash.sha1, 5)
local encrypted = aes_256_cbc_sha1x5:encrypt(mesg)
ngx.say("AES 256 CBC (SHA-1, salted) Encrypted HEX: ", str.to_hex(encrypted))

AES 256 CBC (SHA-1, salted) Encrypted HEX: 619a1da54b6c5113eb335a74296fed54

c++:
int i, nrounds = 5;
unsigned char key[32], iv[32];

i = EVP_BytesToKey(EVP_aes_256_cbc(), EVP_sha1(), NULL, key_data, key_data_len, nrounds, key, iv);

...
hex:1671d15e1905d518201b35064043cb71

to_hex api invoke ngx_hex_dump, it developed by C , same to my own c++ coding, but the result's display is different, Why???

Start with the resty.aes encrypt entry point and the shown C++ EVP_BytesToKey call, then compare the key, salt, cipher, hash, rounds, and hex output in the examples. Reproduce both results and document a maintainer-confirmed explanation for the difference; no repository file or test is named in the issue.