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17 lines
625 B
17 lines
625 B
import Foundation
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import CryptoSwift
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func decrypt(data: Data, key: String, salt: String) -> String? {
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let keyBytes = key.data(using: .utf8)?.bytes ?? []
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let saltBytes = salt.data(using: .utf8)?.bytes ?? []
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guard let PBKDF2key = try? PKCS5.PBKDF2(password: keyBytes, salt: saltBytes, iterations: 4096, variant: .sha256).calculate(),
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let cipher = try? Blowfish(key: PBKDF2key, padding: .pkcs7),
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let decryptedBytes = try? cipher.decrypt(data.bytes) else {
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return nil
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}
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let decryptedData = Data(decryptedBytes)
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return String(data: decryptedData, encoding: .utf8)
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}
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