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Remove encrypt/decrypt functions

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Max Goedjen
2025-08-17 21:40:45 -05:00
parent eeec2c3169
commit 1282089f6e
2 changed files with 0 additions and 238 deletions
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82
Sources/Packages/Sources/SmartCardSecretKit/SmartCardStore.swift
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@@ -195,88 +195,6 @@ 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 = String(localized: "auth_context_request_encrypt_description_\(secret.name)")
context.localizedCancelTitle = String(localized: "auth_context_request_deny_button")
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) async throws -> Data {
guard let tokenID = await state.tokenID else { fatalError() }
let context = LAContext()
context.localizedReason = String(localized: "auth_context_request_decrypt_description_\(secret.name)")
context.localizedCancelTitle = String(localized: "auth_context_request_deny_button")
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 .eciesEncryptionCofactorVariableIVX963SHA384AESGCM
case (.rsa, 1024), (.rsa, 2048):
return .rsaEncryptionOAEPSHA512AESGCM
default:
fatalError()
}
}
}
extension TKTokenWatcher {
/// All available tokens, excluding the Secure Enclave.