(Lianja) Password_Digest = Base64 (SHA-1 ( nonce + created + SHA-1 (password) ) )

Demonstrates how to compute:

Password_Digest = Base64 (SHA-1 ( nonce + created + SHA-1 (password)))

Chilkat Lianja Extension Download Chilkat Lianja Extension

//  This example requires the Chilkat API to have been previously unlocked.
//  See Global Unlock Sample for sample code.

lcPassword = "secret"

loCrypt = createobject("CkCrypt2")
loCrypt.HashAlgorithm = "SHA-1"
loCrypt.EncodingMode = "base64"

//  Generate a 16-byte random nonce
loPrng = createobject("CkPrng")
loBd = createobject("CkBinData")
loPrng.GenRandomBd(16,loBd)

//  Get the current date/time in a string with this format: 2010-06-08T07:26:50Z
loDt = createobject("CkDateTime")
loDt.SetFromCurrentSystemTime()
lcCreated = loDt.GetAsTimestamp(.F.)
loBd.AppendString(lcCreated,"utf-8")

//  This example wishes to calculate a password digest like this:
//  Password_Digest = Base64 ( SHA-1 ( nonce + created + SHA-1(password) ) )

//  First SHA-1 digest the password...
lcPasswordSha1 = loCrypt.HashStringENC(lcPassword)
//  Append the 20 binary bytes of the SHA1 hash to bd, which already contains the nonce and created date/time.
loBd.AppendEncoded(lcPasswordSha1,"base64")

lcPasswordDigest = loCrypt.HashBdENC(loBd)

? "Base64 password digest = " + lcPasswordDigest


release loCrypt
release loPrng
release loBd
release loDt