argon2 password hasing algorithm

argon2_example.py

from argon2 import PasswordHasher
from argon2.exceptions import VerifyMismatchError

memory_cost = 1 << 17
time_cost = 4
parallelism = 2

ph = PasswordHasher(time_cost, memory_cost, parallelism)

## 암호
pwd = 'secret1'

hash = ph.hash(pwd)

## argon2 해시 출력: 
## Ex: $argon2id$v=19$m=102400,t=2,p=8$5gOwqIw5RgkBdw8HXERMLA$9LGcXSLtnENcOfVt9PTxBg
print(hash)

## 암호 검증
ph.verify(hash, pwd)

try:
    ph.verify(hash, 'invalid')
except VerifyMismatchError:
    print ("invalid password")
except:
    raise