42 lines
1.4 KiB
Swift
42 lines
1.4 KiB
Swift
//
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// CCRSACipher.swift
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// punchnet
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//
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// Created by 安礼成 on 2026/3/17.
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//
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import Foundation
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struct CCRSACipher: RSACipher {
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var pubKey: String
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let privateKeyDER: Data
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init(keySize: Int) throws {
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let (privateKey, publicKey) = try Self.loadKeys(keySize: keySize)
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let privKeyStr = SwKeyConvert.PrivateKey.derToPKCS1PEM(privateKey)
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self.pubKey = SwKeyConvert.PublicKey.derToPKCS8PEM(publicKey)
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self.privateKeyDER = try SwKeyConvert.PrivateKey.pemToPKCS1DER(privKeyStr)
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}
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public func decode(data: Data) throws -> Data {
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let tag = Data()
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let (decryptedData, _) = try CC.RSA.decrypt(data, derKey: self.privateKeyDER, tag: tag, padding: .pkcs1, digest: .none)
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return decryptedData
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}
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private static func loadKeys(keySize: Int) throws -> (Data, Data) {
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if let privateKey = UserDefaults.standard.data(forKey: "privateKey"),
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let publicKey = UserDefaults.standard.data(forKey: "publicKey") {
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return (privateKey, publicKey)
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} else {
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let (privateKey, publicKey) = try CC.RSA.generateKeyPair(keySize)
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UserDefaults.standard.setValue(privateKey, forKey: "privateKey")
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UserDefaults.standard.setValue(publicKey, forKey: "publicKey")
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return (privateKey, publicKey)
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}
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}
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}
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