(Visual FoxPro) 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 ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

LOCAL lcPassword
LOCAL loCrypt
LOCAL loPrng
LOCAL loBd
LOCAL loDt
LOCAL lcCreated
LOCAL lcPasswordSha1
LOCAL lcPasswordDigest

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

lcPassword = "secret"

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Crypt2')
loCrypt = CreateObject('Chilkat.Crypt2')
loCrypt.HashAlgorithm = "SHA-1"
loCrypt.EncodingMode = "base64"

* Generate a 16-byte random nonce
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Prng')
loPrng = CreateObject('Chilkat.Prng')
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.BinData')
loBd = CreateObject('Chilkat.BinData')
loPrng.GenRandomBd(16,loBd)

* Get the current date/time in a string with this format: 2010-06-08T07:26:50Z
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.CkDateTime')
loDt = CreateObject('Chilkat.CkDateTime')
loDt.SetFromCurrentSystemTime()
lcCreated = loDt.GetAsTimestamp(0)
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