Hailey
65 lines
1.9 KiB
Swift
65 lines
1.9 KiB
Swift
import CryptoKit
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import JOSESwift
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import ExpoModulesCore
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class CryptoUtil {
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// The equivalent of crypto.subtle.digest() with JS on web
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public static func digest(data: Data) -> Data {
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let hash = SHA256.hash(data: data)
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return Data(hash)
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}
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public static func getRandomValues(byteLength: Int) -> Data {
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let bytes = (0..<byteLength).map { _ in UInt8.random(in: UInt8.min...UInt8.max) }
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return Data(bytes)
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}
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public static func generateKeyPair() throws -> JWKPair? {
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let keyIdString = UUID().uuidString
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let privateKey = P256.Signing.PrivateKey()
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let publicKey = privateKey.publicKey
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let x = publicKey.x963Representation[1..<33].base64URLEncodedString()
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let y = publicKey.x963Representation[33...].base64URLEncodedString()
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let d = privateKey.rawRepresentation.base64URLEncodedString()
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let publicJWK = JWK(
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alg: "ES256".toField(),
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kty: "EC".toField(),
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crv: "P-256".toNullableField(),
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x: x.toNullableField(),
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y: y.toNullableField(),
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use: "sig".toNullableField(),
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kid: keyIdString.toNullableField()
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)
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let privateJWK = JWK(
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alg: "ES256".toField(),
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kty: "EC".toField(),
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crv: "P-256".toNullableField(),
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x: x.toNullableField(),
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y: y.toNullableField(),
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d: d.toNullableField(),
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use: "sig".toNullableField(),
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kid: keyIdString.toNullableField()
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)
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return JWKPair(privateKey: privateJWK.toField(), publicKey: publicJWK.toField())
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}
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}
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extension Data {
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func base64URLEncodedString() -> String {
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return self.base64EncodedString().replacingOccurrences(of: "+", with: "-").replacingOccurrences(of: "/", with: "_").replacingOccurrences(of: "=", with: "")
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}
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}
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extension String {
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func toField() -> Field<String> {
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return Field(wrappedValue: self)
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}
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func toNullableField() -> Field<String?> {
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return Field(wrappedValue: self)
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}
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}
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