Visual FoxPro

Get RSA Public Key in JWK Format (JSON Web Key)

See more JSON Web Signatures (JWS) Examples

Demonstrates how to get an RSA public key in JWK (JSON Web Key) format.

Note: This example requires Chilkat v9.5.0.66 or later.

Visual FoxPro

LOCAL lnSuccess
LOCAL loSbPem
LOCAL loPubKey
LOCAL lcJwk
LOCAL loJson

lnSuccess = 0

* Note: This example requires Chilkat v9.5.0.66 or later.

* Load a PEM file into memory.
loSbPem = CreateObject('Chilkat.StringBuilder')
lnSuccess = loSbPem.LoadFile("qa_data/pem/rsa_public.pem","utf-8")
IF (lnSuccess <> 1) THEN
    ? "Failed to load PEM file."
    RELEASE loSbPem
    CANCEL
ENDIF

* Load the PEM into a public key object.
loPubKey = CreateObject('Chilkat.PublicKey')
lnSuccess = loPubKey.LoadFromString(loSbPem.GetAsString())
IF (lnSuccess <> 1) THEN
    ? loPubKey.LastErrorText
    RELEASE loSbPem
    RELEASE loPubKey
    CANCEL
ENDIF

* Get the public key in JWK format:
lcJwk = loPubKey.GetJwk()

* The GetJwk method will return the JWK in the most compact JSON format possible,
* as a single line with no extra whitespace.  To get a more human-readable JWK (for this example),
* load into a Chilkat JSON object and emit non-compact:

loJson = CreateObject('Chilkat.JsonObject')
loJson.Load(lcJwk)
loJson.EmitCompact = 0
? "RSA Public Key in JWK format:"
? loJson.Emit()

* Sample output:
* { 
*   "kty": "RSA",
*   "n": "33TqqLR3eeUmDtHS89qF3p4MP7Wfqt2Zjj3lZjLjjCGDvwr9cJNlNDiuKboODgUiT4ZdPWbOiMAfDcDzlOxA04DDnEFGAf-kDQiNSe2ZtqC7bnIc8-KSG_qOGQIVaay4Ucr6ovDkykO5Hxn7OU7sJp9TP9H0JH8zMQA6YzijYH9LsupTerrY3U6zyihVEDXXOv08vBHk50BMFJbE9iwFwnxCsU5-UZUZYw87Uu0n4LPFS9BT8tUIvAfnRXIEWCha3KbFWmdZQZlyrFw0buUEf0YN3_Q0auBkdbDR_ES2PbgKTJdkjc_rEeM0TxvOUf7HuUNOhrtAVEN1D5uuxE1WSw",
*   "e": "AQAB"
* }

* Additional information can be added like this:
loJson.AppendString("use","enc")
loJson.AppendString("kid","123ABC")

* Now examine the JSON:
? loJson.Emit()

* { 
*   "kty": "RSA",
*   "n": "33TqqLR3eeUmDtHS89qF3p4MP7Wfqt2Zjj3lZjLjjCGDvwr9cJNlNDiuKboODgUiT4ZdPWbOiMAfDcDzlOxA04DDnEFGAf-kDQiNSe2ZtqC7bnIc8-KSG_qOGQIVaay4Ucr6ovDkykO5Hxn7OU7sJp9TP9H0JH8zMQA6YzijYH9LsupTerrY3U6zyihVEDXXOv08vBHk50BMFJbE9iwFwnxCsU5-UZUZYw87Uu0n4LPFS9BT8tUIvAfnRXIEWCha3KbFWmdZQZlyrFw0buUEf0YN3_Q0auBkdbDR_ES2PbgKTJdkjc_rEeM0TxvOUf7HuUNOhrtAVEN1D5uuxE1WSw",
*   "e": "AQAB",
*   "use": "enc",
*   "kid": "123ABC"
* }

RELEASE loSbPem
RELEASE loPubKey
RELEASE loJson