Encrypt with PBES2 from PKCS #5 v2.0
key_bits = the passphrase to use for encryption
msec = how many milliseconds to run PBKDF2
cipher = specifies the block cipher to use to encrypt
digest = specifies the PRF to use with PBKDF2 (eg "HMAC(SHA-1)")
rng = a random number generator
Encrypt with PBES2 from PKCS #5 v2.0 key_bits = the passphrase to use for encryption msec = how many milliseconds to run PBKDF2 cipher = specifies the block cipher to use to encrypt digest = specifies the PRF to use with PBKDF2 (eg "HMAC(SHA-1)") rng = a random number generator