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(Swift 3,4,5...) Load ECC Public Key from JWK Format (JSON Web Key)Demonstrates how to load an ECC public key from JWK (JSON Web Key) format. Note: This example requires Chilkat v9.5.0.66 or later.
func chilkatTest() { // Note: This example requires Chilkat v9.5.0.66 or later. var success: Bool // First build a JWK sample to load.. let json = CkoJsonObject()! json.update("kty", value: "EC") json.update("crv", value: "P-256") json.update("x", value: "oBUyo8CQAFPeYPvv78ylh5MwFZjTCLQeb042TjiMJxE") json.update("y", value: "vvQyxZkUjJQUPU_0bCy3Pj5qQdfu8jwEfqEeYGZ95CU") // The JSON contains the following: // { // "kty": "EC", // "crv": "P-256", // "x": "oBUyo8CQAFPeYPvv78ylh5MwFZjTCLQeb042TjiMJxE", // "y": "vvQyxZkUjJQUPU_0bCy3Pj5qQdfu8jwEfqEeYGZ95CU", // } // Note: The JSON can contain other members, such as "use", "kid", or anything else. These will be ignored. json.emitCompact = false // Show the JWK string to be loaded: var jwkStr: String? = json.emit() let pubKey = CkoPublicKey()! // The LoadFromString method will automatically detect the format. success = pubKey.load(from: jwkStr) if success != true { print("\(pubKey.lastErrorText!)") return } // OK.. the JWK is loaded. It can be used in whatever way desired... // The key can be retrieved in any other format, such as XML or PEM.. print("\(pubKey.getXml()!)") // XML output: // <ECCPublicKey curve="secp256r1" // x="A01532A3C0900053DE60FBEFEFCCA58793301598D308B41E6F4E364E388C2711" // y="BEF432C599148C94143D4FF46C2CB73E3E6A41D7EEF23C047EA11E60667DE425"> // MIIBSzCCAQMGByqGSM49AgEwgfcCAQEwLAYHKoZIzj0BAQIhAP////8AAAABAAAAAAAAAAAAAAAA////////////////MFsEIP////8AAAABAAAAAAAAAAAAAAAA///////////////8BCBaxjXYqjqT57PrvVV2mIa8ZR0GsMxTsPY7zjw+J9JgSwMVAMSdNgiG5wSTamZ44ROdJreBn36QBEEEaxfR8uEsQkf4vOblY6RA8ncDfYEt6zOg9KE5RdiYwpZP40Li/hp/m47n60p8D54WK84zV2sxXs7LtkBoN79R9QIhAP////8AAAAA//////////+85vqtpxeehPO5ysL8YyVRAgEBA0IABKAVMqPAkABT3mD77+/MpYeTMBWY0wi0Hm9ONk44jCcRvvQyxZkUjJQUPU/0bCy3Pj5qQdfu8jwEfqEeYGZ95CU= // </ECCPublicKey> // Choose PCKS1 or PCKS8 PEM format.. var bPreferPkcs1: Bool = false print("\(pubKey.getPem(bPreferPkcs1)!)") // PEM output // -----BEGIN PUBLIC KEY----- // MIIBSzCCAQMGByqGSM49AgEwgfcCAQEwLAYHKoZIzj0BAQIhAP////8AAAABAAAA // AAAAAAAAAAAA////////////////MFsEIP////8AAAABAAAAAAAAAAAAAAAA//// // ///////////8BCBaxjXYqjqT57PrvVV2mIa8ZR0GsMxTsPY7zjw+J9JgSwMVAMSd // NgiG5wSTamZ44ROdJreBn36QBEEEaxfR8uEsQkf4vOblY6RA8ncDfYEt6zOg9KE5 // RdiYwpZP40Li/hp/m47n60p8D54WK84zV2sxXs7LtkBoN79R9QIhAP////8AAAAA // //////////+85vqtpxeehPO5ysL8YyVRAgEBA0IABKAVMqPAkABT3mD77+/MpYeT // MBWY0wi0Hm9ONk44jCcRvvQyxZkUjJQUPU/0bCy3Pj5qQdfu8jwEfqEeYGZ95CU= // -----END PUBLIC KEY----- } |
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