Removes warnings

Author: dm-zharov

Sources/SwiftSecurity/CryptoKit/SecKeyConvertible.swift

@@ -107,9 +107,9 @@ extension SecKeyConvertible {
     }
 }
 
-public struct SecKeyDescriptor {
-    public var keyType: KeyType
-    public var keyClass: KeyClass
+public struct SecKeyDescriptor: Sendable {
+    public let keyType: KeyType
+    public let keyClass: KeyClass
 
     /// A private key for elliptic curve cryptography. Suitable for `P256`/`P384`/`P521` keys from `CryptoKit`.
     public static let ecPrivateKey = SecKeyDescriptor(keyType: .ecsecPrimeRandom, keyClass: .private)

Sources/SwiftSecurity/Keychain/Keychain.swift

@@ -343,7 +343,7 @@ extension Keychain: SecKeyStore {
         }
 
         var error: Unmanaged<CFError>?
-        guard let data = SecKeyCopyExternalRepresentation(secKey as! SecKey, &error) as Data? else {
+        guard let data = SecKeyCopyExternalRepresentation(secKey as SecKey, &error) as Data? else {
             if let error = error?.takeRetainedValue() {
                 throw SwiftSecurityError(error: error)
             }
@@ -381,7 +381,7 @@ extension Keychain: SecCertificateStore {
         else {
             return nil
         }
-        return T(certificate: secCertificate as! SecCertificate)
+        return T(certificate: secCertificate)
     }
 }
 
@@ -406,7 +406,7 @@ extension Keychain: SecIdentityStore {
         else {
             return nil
         }
-        return T(identity: secIdentity as! SecIdentity)
+        return T(identity: secIdentity)
     }
 }
 

Sources/SwiftSecurity/Keychain/SecItem/SecReturnType.swift

@@ -7,7 +7,7 @@
 
 import Foundation
 
-public struct SecReturnType: OptionSet {
+public struct SecReturnType: OptionSet, Sendable {
     /// Returns a data of an item.
     public static let data                 = SecReturnType(rawValue: 1 << 0)
     /// Returns an attributes of an item.

Sources/SwiftSecurity/Keychain/SecItemAttr/KeyClass.swift

@@ -8,7 +8,7 @@
 import Foundation
 import Security
 
-public enum KeyClass {
+public enum KeyClass: Sendable {
     /// A public key of a public-private pair.
     case `public`
     /// A private key of a public-private pair.

Sources/SwiftSecurity/Keychain/SecItemAttr/KeyType.swift

@@ -11,7 +11,7 @@ import Security
 @available(*, renamed: "KeyType")
 public typealias KeyCipher = KeyType
 
-public enum KeyType {
+public enum KeyType: Sendable {
     /// RSA.
     case rsa
     /// Elliptic curve. Suitable for `P256`, `P384`, `P521` keys from `CryptoKit`.

Sources/SwiftSecurity/Security/DigitalIdentity.swift

@@ -61,7 +61,11 @@ extension DigitalIdentity {
             var secKey: SecKey?
             switch SecIdentityCopyPrivateKey(secIdentity, &secKey) {
             case errSecSuccess:
-                return secKey as! SecKey
+                if let secKey {
+                    return secKey
+                } else {
+                    throw SwiftSecurityError.invalidParameter
+                }
             case let status:
                 throw SwiftSecurityError.underlyingSecurityError(error: status)
             }

Sources/SwiftSecurity/Security/PKCS12.swift

@@ -29,7 +29,7 @@ public enum PKCS12 {
         ] as CFDictionary, &result) {
         case errSecSuccess:
             if let items = result as? Array<[String: Any]> {
-                return try items.map { item in
+                return items.map { item in
                     SecImportItemInfo(rawValue: item)
                 }
             } else {