Lianja Requires Chilkat v11.6.0+

Hash a Password with Argon2 (Tuned Options)

Demonstrates Crypt2.Argon2HashPassword with explicit options: the cost parameters, saltLen (how many random salt bytes to generate when no salt is given), and an optional secret (pepper).

Background. For hashing, the salt is optional — when omitted, a random salt of saltLen bytes (default 16) is generated, which is the normal case. A secret or ad is not stored in the PHC string; the same values must be supplied to Argon2VerifyPassword for the password to verify.

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loCrypt = createobject("CkCrypt2")

//  The password should come from a secure source rather than being hard-coded.
lcPassword = "correct horse battery staple"

//  The Argon2 options are the same members as Argon2DeriveKey, except the salt is optional for
//  hashing.  When no "salt" is given, a random salt is generated; "saltLen" (default 16, range 8..1024)
//  sets how many random bytes to use.
loJson = createobject("CkJsonObject")
loJson.UpdateString("variant","argon2id")
loJson.UpdateInt("memoryCostKb",131072)
loJson.UpdateInt("iterations",4)
loJson.UpdateInt("parallelism",2)
loJson.UpdateInt("saltLen",16)

//  A secret (pepper) and/or ad may be used, but neither is stored in the returned PHC string.  The
//  same values must be supplied to Argon2VerifyPassword for the password to verify.
loJson.UpdateString("secret","application-wide-pepper")
loJson.UpdateString("secretEncoding","utf-8")

lcPhcHash = loCrypt.Argon2HashPassword(lcPassword,loJson.Emit())
if (loCrypt.LastMethodSuccess = .F.) then
    ? loCrypt.LastErrorText
    release loCrypt
    release loJson
    return
endif

? lcPhcHash


release loCrypt
release loJson