87 lines
3 KiB
Swift
87 lines
3 KiB
Swift
//
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// YubiKeyAPDU.swift
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// passKit
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//
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// Copyright © 2022 Bob Sun. All rights reserved.
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//
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import YubiKit
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public enum YubiKeyAPDU {
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public static func selectOpenPGPApplication() -> YKFSelectApplicationAPDU {
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let selectOpenPGPAPDU = YKFSelectApplicationAPDU(data: Data([0xD2, 0x76, 0x00, 0x01, 0x24, 0x01]))!
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return selectOpenPGPAPDU
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}
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public static func verify(password: String) -> YKFAPDU {
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let pw1: [UInt8] = Array(password.utf8)
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var apdu: [UInt8] = []
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apdu += [0x00] // CLA
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apdu += [0x20] // INS: VERIFY
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apdu += [0x00] // P1
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apdu += [0x82] // P2: PW1
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apdu += withUnsafeBytes(of: UInt8(pw1.count).bigEndian, Array.init)
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apdu += pw1
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let verifyApdu = YKFAPDU(data: Data(apdu))!
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return verifyApdu
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}
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public static func decipherExtended(data: Data) -> [YKFAPDU] {
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var apdu: [UInt8] = []
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apdu += [0x00] // CLA (last or only command of a chain)
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apdu += [0x2A, 0x80, 0x86] // INS, P1, P2: PSO.DECIPHER
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// Lc, An extended Lc field consists of three bytes:
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// one byte set to '00' followed by two bytes not set to '0000' (1 to 65535 dec.).
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apdu += [0x00] + withUnsafeBytes(of: UInt16(data.count + 1).bigEndian, Array.init)
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// Padding indicator byte (00) for RSA or (02) for AES followed by cryptogram Cipher DO 'A6' for ECDH
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apdu += [0x00]
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apdu += data
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apdu += [0x02, 0x00]
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return [YKFAPDU(data: Data(apdu))!]
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}
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public static func decipherChained(data: Data) -> [YKFAPDU] {
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var result: [YKFAPDU] = []
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let chunks = chunk(data: data)
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for chunk in chunks.dropLast() {
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var apdu: [UInt8] = []
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apdu += [0x10] // CLA (command is not the last command of a chain)
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apdu += [0x2A, 0x80, 0x86] // INS, P1, P2: PSO.DECIPHER
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apdu += withUnsafeBytes(of: UInt8(chunk.count).bigEndian, Array.init)
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apdu += chunk
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result += [YKFAPDU(data: Data(apdu))!]
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}
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var apdu: [UInt8] = []
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apdu += [0x00] // CLA (last or only command of a chain)
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apdu += [0x2A, 0x80, 0x86] // INS, P1, P2: PSO.DECIPHER
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apdu += withUnsafeBytes(of: UInt8(chunks.last!.count).bigEndian, Array.init)
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apdu += chunks.last!
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apdu += [0x00] // Le
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result += [YKFAPDU(data: Data(apdu))!]
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return result
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}
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public static func get_application_related_data() -> YKFAPDU {
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var apdu: [UInt8] = []
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apdu += [0x00] // CLA
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apdu += [0xCA] // INS: GET DATA
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apdu += [0x00]
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apdu += [0x6E] // P2: application related data
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apdu += [0x00]
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return YKFAPDU(data: Data(apdu))!
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}
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static func chunk(data: Data) -> [[UInt8]] {
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// starts with 00 padding
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let padded: [UInt8] = [0x00] + data
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let MAX_SIZE = 254
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return stride(from: 0, to: padded.count, by: MAX_SIZE).map {
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Array(padded[$0 ..< Swift.min($0 + MAX_SIZE, padded.count)])
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}
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}
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}
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