(Visual FoxPro) Everyware API RSA Encrypt JSON

See more RSA Examples

Demonstrates how to RSA encrypt JSON using everyware.com's RSA public key.

For more information, see https://docs.everyware.com/docs/access-iframe#sample-json--encrypted-payload

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

LOCAL lnSuccess
LOCAL loJson
LOCAL loDt
LOCAL loSb
LOCAL lnBCrlf
LOCAL loPubkey
LOCAL loRsa
LOCAL lcEncryptedJson
LOCAL loSbUrl

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

* First build the JSON to be encrypted.
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.JsonObject')
loJson = CreateObject('Chilkat.JsonObject')
loJson.UpdateString("provider_key","USER GUID HERE")
loJson.UpdateString("menu_item","payment")
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.CkDateTime')
loDt = CreateObject('Chilkat.CkDateTime')
loDt.SetFromCurrentSystemTime()
loJson.UpdateString("date_time",loDt.GetAsUnixTimeStr(0))

* This build JSON like the following:

* {
*     "provider_key": "USER GUID HERE",
*     "menu_item": "payment",
*     "date_time": "1588163411"
* }

* When we sign, we'll want to sign the most compact JSON possible
loJson.EmitCompact = 1

* Everyware's RSA public key is at:  https://docs.everyware.com/docs/everyware-public-rsa-key
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.StringBuilder')
loSb = CreateObject('Chilkat.StringBuilder')
lnBCrlf = 1
loSb.AppendLine("-----BEGIN PUBLIC KEY-----",lnBCrlf)
loSb.AppendLine("MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAxNbflxUSWQ3XJ1N9dAoh",lnBCrlf)
loSb.AppendLine("k+uaiFsg3wkPi9LGS/mH8DtHBgZxKyz+oQBDtnDd9FDEo0ql7MMgCMsTAv27W5vk",lnBCrlf)
loSb.AppendLine("Pu0rm6zhcTeYquWEuVCS7VtVsyTATr0Z9WhqNeZlIRurovJAXl2jRDX6QeY5dayC",lnBCrlf)
loSb.AppendLine("ubwyG4lBWE4fCakGY6zlh+oaElK0rvblqjYoEg3dn4KPRCYGof8OFxLptHThD4cE",lnBCrlf)
loSb.AppendLine("T30j+utVafhO0HRyJ4iR3Pigb4GXdWBtJEEEWddZJizMkjFQkyUAoYLOT8EJ2TW3",lnBCrlf)
loSb.AppendLine("Tz8SvAuHBUEFcPWTSTMAG/bSp5wrYBTXaeEhx+wrYa60OruHuzgmhzKyQVuYlCNJ",lnBCrlf)
loSb.AppendLine("HdbnassuIRjjSNo25o4AdSlWwpGfBZjAiyEInR+KGpHdhKTxSekJxiwiXUS0UfSG",lnBCrlf)
loSb.AppendLine("prOpd5PzWaAR7DvjLsdmR9XffxvJCVxC735gLK7hDJKjCajDPHVDr8FSL8xMlrq0",lnBCrlf)
loSb.AppendLine("nKxtsHeRl1yzoGrRr12+9MiQnHtpqROTNXcXdwe3v+Vh8V5k8v8oIrcgh1+/N7Bd",lnBCrlf)
loSb.AppendLine("NiRsy1gFHBdu/he/KcDRT/9/acQFMPLQueGfZxUvU5As6pEONjtKX2MUg2fMF6Rc",lnBCrlf)
loSb.AppendLine("sQVVrLzg0g7EcuHGfuPeKfD/716MvS8NU7rX+2soijCSQv/e18PJPMVDlcMXjnup",lnBCrlf)
loSb.AppendLine("PPx1tStemesavFlj1okhS6UCAwEAAQ==",lnBCrlf)
loSb.AppendLine("-----END PUBLIC KEY-----",lnBCrlf)

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.PublicKey')
loPubkey = CreateObject('Chilkat.PublicKey')
lnSuccess = loPubkey.LoadFromString(loSb.GetAsString())
IF (lnSuccess = 0) THEN
    ? loPubkey.LastErrorText
    RELEASE loJson
    RELEASE loDt
    RELEASE loSb
    RELEASE loPubkey
    CANCEL
ENDIF

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Rsa')
loRsa = CreateObject('Chilkat.Rsa')
lnSuccess = loRsa.ImportPublicKeyObj(loPubkey)
IF (lnSuccess = 0) THEN
    ? loRsa.LastErrorText
    RELEASE loJson
    RELEASE loDt
    RELEASE loSb
    RELEASE loPubkey
    RELEASE loRsa
    CANCEL
ENDIF

* We probably need a base64Url encoded encrypted key.
* Using straight-up base64 would potenially include chars that are not URL safe (i.e. have special meanings in URLs)
loRsa.EncodingMode = "base64url"

lcEncryptedJson = loRsa.EncryptStringENC(loJson.Emit(),0)

* Build the URL
* Such as:  https://portal.everyware.com/Account/LoginMenu?data={Base64Url_encrypted_JSON}
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.StringBuilder')
loSbUrl = CreateObject('Chilkat.StringBuilder')
loSbUrl.Append("https://portal.everyware.com/Account/LoginMenu?data=")
loSbUrl.Append(lcEncryptedJson)

? loSbUrl.GetAsString()

RELEASE loJson
RELEASE loDt
RELEASE loSb
RELEASE loPubkey
RELEASE loRsa
RELEASE loSbUrl