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(VB.NET) Get RSA Public Key in JWK Format (JSON Web Key)

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.

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

'  Load a PEM file into memory.
Dim sbPem As New Chilkat.StringBuilder
Dim success As Boolean = sbPem.LoadFile("qa_data/pem/rsa_public.pem","utf-8")
If (success <> True) Then
    Console.WriteLine("Failed to load PEM file.")
    Exit Sub
End If


'  Load the PEM into a public key object.
Dim pubKey As New Chilkat.PublicKey
success = pubKey.LoadFromString(sbPem.GetAsString())
If (success <> True) Then
    Console.WriteLine(pubKey.LastErrorText)
    Exit Sub
End If


'  Get the public key in JWK format:
Dim jwk As String = pubKey.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:

Dim json As New Chilkat.JsonObject
json.Load(jwk)
json.EmitCompact = False
Console.WriteLine("RSA Public Key in JWK format:")
Console.WriteLine(json.Emit())

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

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

'  Now examine the JSON:
Console.WriteLine(json.Emit())

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

 

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