To run the example project, clone the repo, and run pod install from the Example directory first.
VerifiableSwift is available through CocoaPods. To install it, simply add the following line to your Podfile:
pod 'VerifiableSwift'Create and sign Credential
// Load did info
let did = "did:meta:000000000000000000000000000000000000000000000000000000000000054b"
let keyId = "did:meta:000000000000000000000000000000000000000000000000000000000000054b#ManagementKey#cfd31afff25b2260ea15ef59f2d5d7dfe8c13511"
let privateKey = ...
// Create credential
let vc = try VerifiableCredential.init()
vc.id = "http://aa.metadium.com/credential/343"
vc.addTypes(types: ["NameCredential"])
vc.issuer = did
vc.issuanceDate = Date()
vc.expirationDate = Date() + 365*24*60*60
vc.credentialSubject = ["id": "did:meta:0000000000000000000000000000000000000000000000000000000000012530", "name": "mansud"]
// Signing credential to JSON web token
let signer = ECDSASigner.init(privateKey: privateKey)
let signedVC = try vc.sign(kid: keyId, nonce: "nonce", signer: signer)
// Serialize signed vc
let serializedVC = try signedVC.serialize()Create and sign presentation
// Load did info
let did = "did:meta:0000000000000000000000000000000000000000000000000000000000012530"
let keyId = "did:meta:0000000000000000000000000000000000000000000000000000000000012530#ManagementKey#c82bd0c7893c267821b7d727c9583c88337aa32d"
let privateKey = ...
// Create presentation
let vp = try VerifiablePresentation.init()
vp.id = "http://aa.metadium.com/pres/fff"
vp.holder = did
vp.addTypes(types: ["NamePresentation"])
vp.addVerifiableCredential(verifiableCredential: serializedVC as Any)
// Signing credential to JSON web token
let signedVP = try vp.sign(kid: "did:meta:43894835", nonce: "vp nonce", signer: signer)
// Serialize signed vp
let serializedVP = try signedVP.serialize()Add issuance and expiration date in presentation
// Add expiration date
let jwt = JWT.init()
jwt.notBeforeTime = Date()
jwt.expirationTime = Date() + 365*24*60*60
// Signing credential to JSON web token
let signedVP = try vp.sign(kid: "did:meta:43894835", nonce: "vp nonce", signer: signer, baseClaims: jwt)Verify credential received from issuer.
// public key of issuer
let publicKey = ...
// credential recevied from issuer
let serializedVC = ...
// verify serialized vc
let verifier = ECDSAVerifier.init(publicKey: publicKey)
let jws = try JWSObject.init(string: serializedVC)
guard try jws.verify(verifier: verifier) else {
return
}
// Check expiration
let verifiedVC = try VerifiableCredential.init(jws: jws)
if verifiedVC.expirationDate != nil && verifiedVC.expirationDate! < Date() {
return
}
// Get claim
let nameClaim = verifiedVC.credentialSubject as! [String: Any])["name"] as? StringVerify presentation received from holder
// public key of holder
let publicKey = ...
// presentation recevied from holder
let serializedVP = ...
// Verify serialized vp
let verifier = ECDSAVerifier.init(publicKey: publicKey)
let vpJws = try JWSObject.init(string: serializedVP)
guard try vpJws.verify(verifier: verifier) else {
XCTAssert(false)
return
}
// Check expiration
let vpJwt = try JWT.init(jsonData: vpJws.payload)
if vpJwt.expirationTime != nil && vpJwt.expirationTime! < Date() {
XCTAssert(false)
return
}
// Get credentials
let verifiedVp = try VerifiablePresentation.init(jws: vpJws)
let credentials = verifiedVp.verifiableCredentials()!VerifiableSwift is available under the MIT license. See the LICENSE file for more info.