B4X

Create JWT Using Ed25519 Private Key (EdDSA)

See more JSON Web Token (JWT) Examples

Demonstrates how to create a JWT using an Ed25519 private key. If the private key is Ed25519, which is an EdDSA algorithm, the JOSE header's "alg" member should be set to "EdDSA".

Note: This example requires Chilkat v9.5.0.95 or greater.

B4X

Dim success As Boolean = False

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

'  Demonstrates how to create a JWT using an Ed25519 private key.

Dim privKey As ChilkatPrivateKey
privKey.Initialize("privKey")

'  Load an Ed25519 (EdDSA) private key from a PEM file.
success = privKey.LoadPemFile("qa_data/eddsa/ed25519.pem")
If success <> True Then
    Log(privKey.LastErrorText)
    Return
End If


Dim jwt As ChilkatJwt
jwt.Initialize

'  Build the JOSE header
Dim jose As ChilkatJsonObject
jose.Initialize

'  -----------------------------------------------------------------
'  Note: This example requires Chilkat v9.5.0.95 or greater.
'  -----------------------------------------------------------------
success = jose.AppendString("alg", "EdDSA")
success = jose.AppendString("typ", "JWT")

'  Now build the JWT claims (also known as the payload)
Dim claims As ChilkatJsonObject
claims.Initialize
success = claims.AppendString("iss", "http://example.org")
success = claims.AppendString("sub", "John")
success = claims.AppendString("aud", "http://example.com")

'  (optional) Set the timestamp of when the JWT was created to now.
Dim curDateTime As Int = jwt.GenNumericDate(0)
success = claims.AddIntAt(-1, "iat", curDateTime)

'  (optional)  Set the "not process before" timestamp to now.
success = claims.AddIntAt(-1, "nbf", curDateTime)

'  (optional)  Set the timestamp defining an expiration time (end time) for the token
'  to be now + 1 hour (3600 seconds)
success = claims.AddIntAt(-1, "exp", curDateTime + 3600)

'  Produce the smallest possible JWT:
jwt.AutoCompact = True

'  Create the JWT token.
Dim token As String = jwt.CreateJwtPk(jose.Emit, claims.Emit, privKey)

Log(token)

'  Example output:
'  eyJhbGciOiJFZERTQSIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJodHRwOi8vZXhhbXBsZS5vcmciLCJzdWIiOiJKb2huIiwiYXVkIjoiaHR0cDovL2V4YW1wbGUuY29tIiwiaWF0IjoxNjg3OTcwNjgyLCJuYmYiOjE2ODc5NzA2ODIsImV4cCI6MTY4Nzk3NDI4Mn0.eyfrDJfuWJSJVJPfAUYb_p_c-LF_YULHGRaZx82MLLjMLCCFEEGckp8icuayf5bLW9ah20LzYYt0JgOBIB0RDg