feat: add swift-secure-enclave-tool.swift

.gitignore

@@ -1,3 +1,4 @@
+swift-secure-enclave-tool
 # ---> Swift
 # Xcode
 #

swift-secure-enclave-tool.swift

@@ -0,0 +1,63 @@
+// Reference:
+// - https://developer.apple.com/documentation/swift/commandline/arguments
+// - https://git.hatter.ink/hatter/card-cli/src/branch/master/swift-lib/src/lib.swift
+
+import CryptoKit
+import LocalAuthentication
+
+func isSupportSecureEnclave() -> Bool {
+    return SecureEnclave.isAvailable
+}
+
+func generateSecureEnclaveP256KeyPair(sign: Bool) -> String {
+    var error: Unmanaged<CFError>? = nil;
+    guard let accessCtrl = SecAccessControlCreateWithFlags(
+       nil,
+       kSecAttrAccessibleWhenUnlockedThisDeviceOnly,
+       [.privateKeyUsage, .biometryCurrentSet],
+       &error
+    ) else {
+        return "err:\(error.debugDescription)"
+    }
+    do {
+        if (sign) {
+            let privateKeyReference = try SecureEnclave.P256.Signing.PrivateKey.init(
+               accessControl: accessCtrl
+            );
+            let publicKeyBase64 = privateKeyReference.publicKey.x963Representation.base64EncodedString()
+            let publicKeyPem = privateKeyReference.publicKey.derRepresentation.base64EncodedString()
+            let dataRepresentationBase64 = privateKeyReference.dataRepresentation.base64EncodedString()
+            return "ok:\(publicKeyBase64),\(publicKeyPem),\(dataRepresentationBase64)"
+        } else {
+            let privateKeyReference = try SecureEnclave.P256.KeyAgreement.PrivateKey.init(
+               accessControl: accessCtrl
+            );
+            let publicKeyBase64 = privateKeyReference.publicKey.x963Representation.base64EncodedString()
+            let publicKeyPem = privateKeyReference.publicKey.derRepresentation.base64EncodedString()
+            let dataRepresentationBase64 = privateKeyReference.dataRepresentation.base64EncodedString()
+            return "ok:\(publicKeyBase64),\(publicKeyPem),\(dataRepresentationBase64)"
+        }
+    } catch {
+        return "err:\(error)"
+    }
+}
+
+if (CommandLine.arguments.count == 1) {
+    print("err:requireArguments")
+    exit(1)
+}
+
+let action = CommandLine.arguments[1];
+
+if (action == "checkSecureEnclaveEnabled") {
+    print("ok:\(isSupportSecureEnclave())")
+    exit(0);
+}
+
+if (action == "generateSecureEnclaveP256SingingKeyPair") {
+    print(generateSecureEnclaveP256KeyPair(sign: true))
+    exit(0);
+}
+
+print("err:unknownAction")
+exit(1)