Fix 5.8 warnings

Author: dnadoba

Sources/X509/CertificatePrivateKey.swift

@@ -14,6 +14,7 @@
 
 @preconcurrency import Crypto
 @preconcurrency import _CryptoExtras
+import Foundation
 
 extension Certificate {
     /// A private key that can be used with a certificate.

Sources/X509/CertificatePublicKey.swift

@@ -15,6 +15,7 @@
 import SwiftASN1
 @preconcurrency import Crypto
 @preconcurrency import _CryptoExtras
+import Foundation
 
 extension Certificate {
     /// A public key that can be used with a certificate.

Sources/X509/DistinguishedNameBuilder/CommonName.swift

@@ -12,6 +12,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+import SwiftASN1
+
 /// Set the Common Name (CN) of a ``DistinguishedName``.
 ///
 /// This type is used in ``DistinguishedNameBuilder`` contexts.

Sources/X509/DistinguishedNameBuilder/CountryName.swift

@@ -12,6 +12,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+import SwiftASN1
+
 /// Set the Country Name (C) of a ``DistinguishedName``.
 ///
 /// This type is used in ``DistinguishedNameBuilder`` contexts.

Sources/X509/DistinguishedNameBuilder/LocalityName.swift

@@ -12,6 +12,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+import SwiftASN1
+
 /// Set the Locality Name (L) of a ``DistinguishedName``.
 ///
 /// This type is used in ``DistinguishedNameBuilder`` contexts.

Sources/X509/DistinguishedNameBuilder/OrganizationName.swift

@@ -12,6 +12,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+import SwiftASN1
+
 /// Set the Organization Name (O) of a ``DistinguishedName``.
 ///
 /// This type is used in ``DistinguishedNameBuilder`` contexts.

Sources/X509/DistinguishedNameBuilder/OrganizationalUnitName.swift

@@ -12,6 +12,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+import SwiftASN1
+
 /// Set the Organizational Unit Name (OU) of a ``DistinguishedName``.
 ///
 /// This type is used in ``DistinguishedNameBuilder`` contexts.

Sources/X509/DistinguishedNameBuilder/StateOrProvinceName.swift

@@ -12,6 +12,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+import SwiftASN1
+
 /// Set the State or Province Name (ST) of a ``DistinguishedName``.
 ///
 /// This type is used in ``DistinguishedNameBuilder`` contexts.

Sources/X509/DistinguishedNameBuilder/StreetAddress.swift

@@ -12,6 +12,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+import SwiftASN1
+
 /// Set the Street Address (STREET) of a ``DistinguishedName``.
 ///
 /// This type is used in ``DistinguishedNameBuilder`` contexts.

Sources/X509/OCSP/OCSPPolicy.swift

@@ -77,7 +77,7 @@ enum OCSPRequestHashAlgorithm {
     }
 }
 
-public struct OCSPVerifierPolicy<Requester: OCSPRequester>: VerifierPolicy {
+public struct OCSPVerifierPolicy<Requester: OCSPRequester>: VerifierPolicy, Sendable {
 
     private var requester: Requester
     private var requestHashAlgorithm: OCSPRequestHashAlgorithm
@@ -303,7 +303,7 @@ extension OCSPSingleResponse {
 ///   - maxDuration: max execution duration in seconds of `operation`
 ///   - operation: the task to start and cancel after `maxDuration` seconds
 /// - Returns: the result of `operation`
-private func withTimeout<Result>(
+private func withTimeout<Result: Sendable>(
     _ maxDuration: TimeInterval,
     operation: @escaping @Sendable () async -> Result
 ) async -> Result {