Merge branch 'main' into list-key-and-certificate

README.md

@@ -17,7 +17,7 @@ The most common setup for SSH keys is just keeping them on disk, guarded by prop
 
 ### Access Control
 
-If your Mac has a Secure Enclave, it also has support for strong access controls like Touch ID, or authentication with Apple Watch. You can configure your key so that they require Touch ID (or Watch) authentication before they're accessed.
+If your Mac has a Secure Enclave, it also has support for strong access controls like Touch ID, or authentication with Apple Watch. You can configure your keys so that they require Touch ID (or Watch) authentication before they're accessed.
 
 <img src="/.github/readme/touchid.png" alt="Screenshot of Secretive authenticating with Touch ID" width="400">
 

Sources/Packages/Sources/SecretKit/Documentation.docc/Documentation.md

@@ -32,3 +32,9 @@ SecretKit is a collection of protocols describing secrets and stores.
 ### Authentication Persistence
 
 - ``PersistedAuthenticationContext``
+
+### Errors
+
+- ``KeychainError``
+- ``SigningError``
+- ``SecurityError``

Sources/Packages/Sources/SecretKit/Erasers/AnySecretStore.swift

@@ -10,6 +10,7 @@ public class AnySecretStore: SecretStore {
     private let _name: () -> String
     private let _secrets: () -> [AnySecret]
     private let _sign: (Data, AnySecret, SigningRequestProvenance) throws -> Data
+    private let _verify: (Data, Data, AnySecret) throws -> Bool
     private let _existingPersistedAuthenticationContext: (AnySecret) -> PersistedAuthenticationContext?
     private let _persistAuthentication: (AnySecret, TimeInterval) throws -> Void
     private let _reloadSecrets: () -> Void
@@ -23,6 +24,7 @@ public class AnySecretStore: SecretStore {
         _id = { secretStore.id }
         _secrets = { secretStore.secrets.map { AnySecret($0) } }
         _sign = { try secretStore.sign(data: $0, with: $1.base as! SecretStoreType.SecretType, for: $2) }
+        _verify = { try secretStore.verify(signature: $0, for: $1, with: $2.base as! SecretStoreType.SecretType) }
         _existingPersistedAuthenticationContext = { secretStore.existingPersistedAuthenticationContext(secret: $0.base as! SecretStoreType.SecretType) }
         _persistAuthentication = { try secretStore.persistAuthentication(secret: $0.base as! SecretStoreType.SecretType, forDuration: $1) }
         _reloadSecrets = { secretStore.reloadSecrets() }
@@ -51,6 +53,10 @@ public class AnySecretStore: SecretStore {
         try _sign(data, secret, provenance)
     }
 
+    public func verify(signature: Data, for data: Data, with secret: AnySecret) throws -> Bool {
+        try _verify(signature, data, secret)
+    }
+
     public func existingPersistedAuthenticationContext(secret: AnySecret) -> PersistedAuthenticationContext? {
         _existingPersistedAuthenticationContext(secret)
     }

Sources/Packages/Sources/SecretKit/KeychainDictionary.swift

@@ -1,5 +0,0 @@
-import Foundation
-
-public func KeychainDictionary(_ dictionary: [CFString: Any]) -> CFDictionary {
-    dictionary as CFDictionary
-}

Sources/Packages/Sources/SecretKit/KeychainTypes.swift

@@ -0,0 +1,71 @@
+import Foundation
+
+public typealias SecurityError = Unmanaged<CFError>
+
+/// Wraps a Swift dictionary in a CFDictionary.
+/// - Parameter dictionary: The Swift dictionary to wrap.
+/// - Returns: A CFDictionary containing the keys and values.
+public func KeychainDictionary(_ dictionary: [CFString: Any]) -> CFDictionary {
+    dictionary as CFDictionary
+}
+
+public extension CFError {
+
+    /// The CFError returned when a verification operation fails.
+    static let verifyError = CFErrorCreate(nil, NSOSStatusErrorDomain as CFErrorDomain, CFIndex(errSecVerifyFailed), nil)!
+
+    /// Equality operation that only considers domain and code.
+    static func ~=(lhs: CFError, rhs: CFError) -> Bool {
+        CFErrorGetDomain(lhs) == CFErrorGetDomain(rhs) && CFErrorGetCode(lhs) == CFErrorGetCode(rhs)
+    }
+
+}
+
+/// A wrapper around an error code reported by a Keychain API.
+public struct KeychainError: Error {
+    /// The status code involved, if one was reported.
+    public let statusCode: OSStatus?
+
+    /// Initializes a KeychainError with an optional error code.
+    /// - Parameter statusCode: The status code returned by the keychain operation, if one is applicable.
+    public init(statusCode: OSStatus?) {
+        self.statusCode = statusCode
+    }
+}
+
+/// A signing-related error.
+public struct SigningError: Error {
+    /// The underlying error reported by the API, if one was returned.
+    public let error: SecurityError?
+
+    /// Initializes a SigningError with an optional SecurityError.
+    /// - Parameter statusCode: The SecurityError, if one is applicable.
+    public init(error: SecurityError?) {
+        self.error = error
+    }
+
+}
+
+public extension SecretStore {
+
+    /// Returns the appropriate keychian signature algorithm to use for a given secret.
+    /// - Parameters:
+    ///   - secret: The secret which will be used for signing.
+    ///   - allowRSA: Whether or not RSA key types should be permited.
+    /// - Returns: The appropriate algorithm.
+    func signatureAlgorithm(for secret: SecretType, allowRSA: Bool = false) -> SecKeyAlgorithm {
+        switch (secret.algorithm, secret.keySize) {
+        case (.ellipticCurve, 256):
+            return .ecdsaSignatureMessageX962SHA256
+        case (.ellipticCurve, 384):
+            return .ecdsaSignatureMessageX962SHA384
+        case (.rsa, 1024), (.rsa, 2048):
+            guard allowRSA else { fatalError() }
+            return .rsaSignatureMessagePKCS1v15SHA512
+        default:
+            fatalError()
+        }
+
+    }
+
+}

Sources/Packages/Sources/SecretKit/OpenSSH/OpenSSHKeyWriter.swift

@@ -64,6 +64,10 @@ extension OpenSSHKeyWriter {
         switch algorithm {
         case .ellipticCurve:
             return "ecdsa-sha2-nistp" + String(describing: length)
+        case .rsa:
+            // All RSA keys use the same 512 bit hash function, per
+            // https://security.stackexchange.com/questions/255074/why-are-rsa-sha2-512-and-rsa-sha2-256-supported-but-not-reported-by-ssh-q-key
+            return "rsa-sha2-512"
         }
     }
 
@@ -76,6 +80,9 @@ extension OpenSSHKeyWriter {
         switch algorithm {
         case .ellipticCurve:
             return "nistp" + String(describing: length)
+        case .rsa:
+            // All RSA keys use the same 512 bit hash function
+            return "rsa-sha2-512"
         }
     }
 

Sources/Packages/Sources/SecretKit/Types/Secret.swift

@@ -20,6 +20,7 @@ public protocol Secret: Identifiable, Hashable {
 public enum Algorithm: Hashable {
 
     case ellipticCurve
+    case rsa
 
     /// Initializes the Algorithm with a secAttr representation of an algorithm.
     /// - Parameter secAttr: the secAttr, represented as an NSNumber.
@@ -28,8 +29,19 @@ public enum Algorithm: Hashable {
         switch secAttrString {
         case kSecAttrKeyTypeEC:
             self = .ellipticCurve
+        case kSecAttrKeyTypeRSA:
+            self = .rsa
         default:
             fatalError()
         }
     }
+    
+    public var secAttrKeyType: CFString {
+        switch self {
+        case .ellipticCurve:
+            return kSecAttrKeyTypeEC
+        case .rsa:
+            return kSecAttrKeyTypeRSA
+        }
+    }
 }

Sources/Packages/Sources/SecretKit/Types/SecretStore.swift

@@ -23,6 +23,14 @@ public protocol SecretStore: ObservableObject, Identifiable {
     /// - Returns: The signed data.
     func sign(data: Data, with secret: SecretType, for provenance: SigningRequestProvenance) throws -> Data
 
+    /// Verifies that a signature is valid over a specified payload.
+    /// - Parameters:
+    ///   - signature: The signature over the data.
+    ///   - data: The data to verify the signature of.
+    ///   - secret: The secret whose signature to verify.
+    /// - Returns: Whether the signature was verified.
+    func verify(signature: Data, for data: Data, with secret: SecretType) throws -> Bool
+
     /// Checks to see if there is currently a valid persisted authentication for a given secret.
     /// - Parameters:
     ///   - secret: The ``Secret`` to check if there is a persisted authentication for.

Sources/Packages/Sources/SecureEnclaveSecretKit/SecureEnclaveStore.swift

@@ -101,7 +101,7 @@ extension SecureEnclave {
             reloadSecretsInternal()
         }
         
-        public func sign(data: Data, with secret: SecretType, for provenance: SigningRequestProvenance) throws -> Data {
+        public func sign(data: Data, with secret: Secret, for provenance: SigningRequestProvenance) throws -> Data {
             let context: LAContext
             if let existing = persistedAuthenticationContexts[secret], existing.valid {
                 context = existing.context
@@ -138,6 +138,41 @@ extension SecureEnclave {
             return signature as Data
         }
 
+        public func verify(signature: Data, for data: Data, with secret: Secret) throws -> Bool {
+            let context = LAContext()
+            context.localizedReason = "verify a signature using secret \"\(secret.name)\""
+            context.localizedCancelTitle = "Deny"
+            let attributes = KeychainDictionary([
+                kSecClass: kSecClassKey,
+                kSecAttrKeyClass: kSecAttrKeyClassPrivate,
+                kSecAttrApplicationLabel: secret.id as CFData,
+                kSecAttrKeyType: Constants.keyType,
+                kSecAttrTokenID: kSecAttrTokenIDSecureEnclave,
+                kSecAttrApplicationTag: Constants.keyTag,
+                kSecUseAuthenticationContext: context,
+                kSecReturnRef: true
+                ])
+            var verifyError: SecurityError?
+            var untyped: CFTypeRef?
+            let status = SecItemCopyMatching(attributes, &untyped)
+            if status != errSecSuccess {
+                throw KeychainError(statusCode: status)
+            }
+            guard let untypedSafe = untyped else {
+                throw KeychainError(statusCode: errSecSuccess)
+            }
+            let key = untypedSafe as! SecKey
+            let verified = SecKeyVerifySignature(key, .ecdsaSignatureMessageX962SHA256, data as CFData, signature as CFData, &verifyError)
+            if !verified, let verifyError {
+                if verifyError.takeUnretainedValue() ~= .verifyError {
+                    return false
+                } else {
+                    throw SigningError(error: verifyError)
+                }
+            }
+            return verified
+        }
+
         public func existingPersistedAuthenticationContext(secret: Secret) -> PersistedAuthenticationContext? {
             guard let persisted = persistedAuthenticationContexts[secret], persisted.valid else { return nil }
             return persisted
@@ -260,34 +295,12 @@ extension SecureEnclave.Store {
             ])
         let status = SecItemAdd(attributes, nil)
         if status != errSecSuccess {
-            throw SecureEnclave.KeychainError(statusCode: status)
+            throw KeychainError(statusCode: status)
         }
     }
 
 }
 
-extension SecureEnclave {
-
-    /// A wrapper around an error code reported by a Keychain API.
-    public struct KeychainError: Error {
-        /// The status code involved, if one was reported.
-        public let statusCode: OSStatus?
-    }
-
-    /// A signing-related error.
-    public struct SigningError: Error {
-        /// The underlying error reported by the API, if one was returned.
-        public let error: SecurityError?
-    }
-
-}
-
-extension SecureEnclave {
-
-    public typealias SecurityError = Unmanaged<CFError>
-
-}
-
 extension SecureEnclave {
 
     enum Constants {

Sources/Packages/Sources/SmartCardSecretKit/Documentation.docc/SmartCard.md

@@ -6,9 +6,3 @@
 
 - ``Secret``
 - ``Store``
-
-### Errors
-
-- ``KeychainError``
-- ``SigningError``
-- ``SecurityError``

Sources/Packages/Sources/SmartCardSecretKit/SmartCardStore.swift

@@ -45,7 +45,7 @@ extension SmartCard {
             fatalError("Keys must be deleted on the smart card.")
         }
 
-        public func sign(data: Data, with secret: SecretType, for provenance: SigningRequestProvenance) throws -> Data {
+        public func sign(data: Data, with secret: Secret, for provenance: SigningRequestProvenance) throws -> Data {
             guard let tokenID = tokenID else { fatalError() }
             let context = LAContext()
             context.localizedReason = "sign a request from \"\(provenance.origin.displayName)\" using secret \"\(secret.name)\""
@@ -68,26 +68,40 @@ extension SmartCard {
             }
             let key = untypedSafe as! SecKey
             var signError: SecurityError?
-            let signatureAlgorithm: SecKeyAlgorithm
+            guard let signature = SecKeyCreateSignature(key, signatureAlgorithm(for: secret, allowRSA: true), data as CFData, &signError) else {
-            switch (secret.algorithm, secret.keySize) {
-            case (.ellipticCurve, 256):
-                signatureAlgorithm = .ecdsaSignatureMessageX962SHA256
-            case (.ellipticCurve, 384):
-                signatureAlgorithm = .ecdsaSignatureMessageX962SHA384
-            default:
-                fatalError()
-            }
-            guard let signature = SecKeyCreateSignature(key, signatureAlgorithm, data as CFData, &signError) else {
                 throw SigningError(error: signError)
             }
             return signature as Data
         }
+        
+        public func verify(signature: Data, for data: Data, with secret: Secret) throws -> Bool {
+            let attributes = KeychainDictionary([
+                kSecAttrKeyType: secret.algorithm.secAttrKeyType,
+                kSecAttrKeySizeInBits: secret.keySize,
+                kSecAttrKeyClass: kSecAttrKeyClassPublic
+            ])
+            var verifyError: SecurityError?
+            let untyped: CFTypeRef? = SecKeyCreateWithData(secret.publicKey as CFData, attributes, &verifyError)
+            guard let untypedSafe = untyped else {
+                throw KeychainError(statusCode: errSecSuccess)
+            }
+            let key = untypedSafe as! SecKey
+            let verified = SecKeyVerifySignature(key, signatureAlgorithm(for: secret, allowRSA: true), data as CFData, signature as CFData, &verifyError)
+            if !verified, let verifyError {
+                if verifyError.takeUnretainedValue() ~= .verifyError {
+                    return false
+                } else {
+                    throw SigningError(error: verifyError)
+                }
+            }
+            return verified
+        }
 
-        public func existingPersistedAuthenticationContext(secret: SmartCard.Secret) -> PersistedAuthenticationContext? {
+        public func existingPersistedAuthenticationContext(secret: Secret) -> PersistedAuthenticationContext? {
             nil
         }
 
-        public func persistAuthentication(secret: SmartCard.Secret, forDuration: TimeInterval) throws {
+        public func persistAuthentication(secret: Secret, forDuration: TimeInterval) throws {
         }
 
         /// Reloads all secrets from the store.
@@ -140,7 +154,6 @@ extension SmartCard.Store {
         let attributes = KeychainDictionary([
             kSecClass: kSecClassKey,
             kSecAttrTokenID: tokenID,
-            kSecAttrKeyType: kSecAttrKeyTypeEC, // Restrict to EC
             kSecReturnRef: true,
             kSecMatchLimit: kSecMatchLimitAll,
             kSecReturnAttributes: true
@@ -148,7 +161,7 @@ extension SmartCard.Store {
         var untyped: CFTypeRef?
         SecItemCopyMatching(attributes, &untyped)
         guard let typed = untyped as? [[CFString: Any]] else { return }
-        let wrapped: [SmartCard.Secret] = typed.map {
+        let wrapped = typed.map {
             let name = $0[kSecAttrLabel] as? String ?? "Unnamed"
             let tokenID = $0[kSecAttrApplicationLabel] as! Data
             let algorithm = Algorithm(secAttr: $0[kSecAttrKeyType] as! NSNumber)
@@ -164,6 +177,88 @@ extension SmartCard.Store {
 
 }
 
+
+// MARK: Smart Card specific encryption/decryption/verification
+extension SmartCard.Store {
+
+    /// Encrypts a payload with a specified key.
+    /// - Parameters:
+    ///   - data: The payload to encrypt.
+    ///   - secret: The secret to encrypt with.
+    /// - Returns: The encrypted data.
+    /// - Warning: Encryption functions are deliberately only exposed on a library level, and are not exposed in Secretive itself to prevent users from data loss. Any pull requests which expose this functionality in the app will not be merged.
+    public func encrypt(data: Data, with secret: SecretType) throws -> Data {
+        let context = LAContext()
+        context.localizedReason = "encrypt data using secret \"\(secret.name)\""
+        context.localizedCancelTitle = "Deny"
+        let attributes = KeychainDictionary([
+            kSecAttrKeyType: secret.algorithm.secAttrKeyType,
+            kSecAttrKeySizeInBits: secret.keySize,
+            kSecAttrKeyClass: kSecAttrKeyClassPublic,
+            kSecUseAuthenticationContext: context
+        ])
+        var encryptError: SecurityError?
+        let untyped: CFTypeRef? = SecKeyCreateWithData(secret.publicKey as CFData, attributes, &encryptError)
+        guard let untypedSafe = untyped else {
+            throw KeychainError(statusCode: errSecSuccess)
+        }
+        let key = untypedSafe as! SecKey
+        guard let signature = SecKeyCreateEncryptedData(key, encryptionAlgorithm(for: secret), data as CFData, &encryptError) else {
+            throw SigningError(error: encryptError)
+        }
+        return signature as Data
+    }
+
+    /// Decrypts a payload with a specified key.
+    /// - Parameters:
+    ///   - data: The payload to decrypt.
+    ///   - secret: The secret to decrypt with.
+    /// - Returns: The decrypted data.
+    /// - Warning: Encryption functions are deliberately only exposed on a library level, and are not exposed in Secretive itself to prevent users from data loss. Any pull requests which expose this functionality in the app will not be merged.
+    public func decrypt(data: Data, with secret: SecretType) throws -> Data {
+        guard let tokenID = tokenID else { fatalError() }
+        let context = LAContext()
+        context.localizedReason = "decrypt data using secret \"\(secret.name)\""
+        context.localizedCancelTitle = "Deny"
+        let attributes = KeychainDictionary([
+            kSecClass: kSecClassKey,
+            kSecAttrKeyClass: kSecAttrKeyClassPrivate,
+            kSecAttrApplicationLabel: secret.id as CFData,
+            kSecAttrTokenID: tokenID,
+            kSecUseAuthenticationContext: context,
+            kSecReturnRef: true
+        ])
+        var untyped: CFTypeRef?
+        let status = SecItemCopyMatching(attributes, &untyped)
+        if status != errSecSuccess {
+            throw KeychainError(statusCode: status)
+        }
+        guard let untypedSafe = untyped else {
+            throw KeychainError(statusCode: errSecSuccess)
+        }
+        let key = untypedSafe as! SecKey
+        var encryptError: SecurityError?
+        guard let signature = SecKeyCreateDecryptedData(key, encryptionAlgorithm(for: secret), data as CFData, &encryptError) else {
+            throw SigningError(error: encryptError)
+        }
+        return signature as Data
+    }
+
+    private func encryptionAlgorithm(for secret: SecretType) -> SecKeyAlgorithm {
+        switch (secret.algorithm, secret.keySize) {
+        case (.ellipticCurve, 256):
+            return .eciesEncryptionCofactorVariableIVX963SHA256AESGCM
+        case (.ellipticCurve, 384):
+            return .eciesEncryptionCofactorVariableIVX963SHA256AESGCM
+        case (.rsa, 1024), (.rsa, 2048):
+            return .rsaEncryptionOAEPSHA512AESGCM
+        default:
+            fatalError()
+        }
+    }
+
+}
+
 extension TKTokenWatcher {
 
     /// All available tokens, excluding the Secure Enclave.
@@ -172,25 +267,3 @@ extension TKTokenWatcher {
     }
 
 }
-
-extension SmartCard {
-
-    /// A wrapper around an error code reported by a Keychain API.
-    public struct KeychainError: Error {
-        /// The status code involved.
-        public let statusCode: OSStatus
-    }
-
-    /// A signing-related error.
-    public struct SigningError: Error {
-        /// The underlying error reported by the API, if one was returned.
-        public let error: SecurityError?
-    }
-
-}
-
-extension SmartCard {
-
-    public typealias SecurityError = Unmanaged<CFError>
-
-}

Sources/Packages/Tests/SecretAgentKitTests/AgentTests.swift

@@ -61,8 +61,17 @@ class AgentTests: XCTestCase {
         var rs = r
         rs.append(s)
         let signature = try! P256.Signing.ECDSASignature(rawRepresentation: rs)
-        let valid = try! P256.Signing.PublicKey(x963Representation: Constants.Secrets.ecdsa256Secret.publicKey).isValidSignature(signature, for: dataToSign)
+        let referenceValid = try! P256.Signing.PublicKey(x963Representation: Constants.Secrets.ecdsa256Secret.publicKey).isValidSignature(signature, for: dataToSign)
-        XCTAssertTrue(valid)
+        let store = list.stores.first!
+        let derVerifies = try! store.verify(signature: signature.derRepresentation, for: dataToSign, with: AnySecret(Constants.Secrets.ecdsa256Secret))
+        let invalidRandomSignature = try? store.verify(signature: "invalid".data(using: .utf8)!, for: dataToSign, with: AnySecret(Constants.Secrets.ecdsa256Secret))
+        let invalidRandomData = try? store.verify(signature: signature.derRepresentation, for: "invalid".data(using: .utf8)!, with: AnySecret(Constants.Secrets.ecdsa256Secret))
+        let invalidWrongKey = try? store.verify(signature: signature.derRepresentation, for: dataToSign, with: AnySecret(Constants.Secrets.ecdsa384Secret))
+        XCTAssertTrue(referenceValid)
+        XCTAssertTrue(derVerifies)
+        XCTAssert(invalidRandomSignature == false)
+        XCTAssert(invalidRandomData == false)
+        XCTAssert(invalidWrongKey == false)
     }
 
     // MARK: Witness protocol

Sources/Packages/Tests/SecretAgentKitTests/StubStore.swift

@@ -58,16 +58,30 @@ extension Stub {
                 kSecAttrKeyClass: kSecAttrKeyClassPrivate
                 ])
                 , nil)!
-            let signatureAlgorithm: SecKeyAlgorithm
+            return SecKeyCreateSignature(privateKey, signatureAlgorithm(for: secret), data as CFData, nil)! as Data
-            switch secret.keySize {
+        }
-            case 256:
+
-                signatureAlgorithm = .ecdsaSignatureMessageX962SHA256
+        public func verify(signature: Data, for data: Data, with secret: Stub.Secret) throws -> Bool {
-            case 384:
+            let attributes = KeychainDictionary([
-                signatureAlgorithm = .ecdsaSignatureMessageX962SHA384
+                kSecAttrKeyType: secret.algorithm.secAttrKeyType,
-            default:
+                kSecAttrKeySizeInBits: secret.keySize,
-                fatalError()
+                kSecAttrKeyClass: kSecAttrKeyClassPublic
+            ])
+            var verifyError: Unmanaged<CFError>?
+            let untyped: CFTypeRef? = SecKeyCreateWithData(secret.publicKey as CFData, attributes, &verifyError)
+            guard let untypedSafe = untyped else {
+                throw NSError(domain: "test", code: 0, userInfo: nil)
             }
-            return SecKeyCreateSignature(privateKey, signatureAlgorithm, data as CFData, nil)! as Data
+            let key = untypedSafe as! SecKey
+            let verified = SecKeyVerifySignature(key, signatureAlgorithm(for: secret), data as CFData, signature as CFData, &verifyError)
+            if let verifyError {
+                if verifyError.takeUnretainedValue() ~= .verifyError {
+                    return false
+                } else {
+                    throw NSError(domain: "test", code: 0, userInfo: nil)
+                }
+            }
+            return verified
         }
 
         public func existingPersistedAuthenticationContext(secret: Stub.Secret) -> PersistedAuthenticationContext? {

Sources/Secretive/Preview Content/PreviewStore.swift

@@ -40,6 +40,10 @@ extension Preview {
             return data
         }
 
+        func verify(signature data: Data, for signature: Data, with secret: Preview.Secret) throws -> Bool {
+            true
+        }
+
         func existingPersistedAuthenticationContext(secret: Preview.Secret) -> PersistedAuthenticationContext? {
             nil
         }

Sources/Secretive/Views/EmptyStoreView.swift

@@ -34,7 +34,7 @@ struct EmptyStoreImmutableView: View {
         VStack {
             Text("No Secrets").bold()
             Text("Use your Smart Card's management tool to create a secret.")
-            Text("Secretive only supports Elliptic Curve keys.")
+            Text("Secretive supports EC256, EC384, RSA1024, and RSA2048 keys.")
         }.frame(maxWidth: .infinity, maxHeight: .infinity)
     }