92 lines
2.6 KiB
Swift
92 lines
2.6 KiB
Swift
// ===----------------------------------------------------------------------===
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//
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// This source file is part of the Marvel Service open source project
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//
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// Copyright (c) 2025 Röck+Cöde VoF. and the Marvel Service project authors
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// Licensed under Apache license v2.0
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//
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// See LICENSE for license information
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// See CONTRIBUTORS for the list of Marvel Service project authors
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//
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// SPDX-License-Identifier: Apache-2.0
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//
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// ===----------------------------------------------------------------------===
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#if canImport(CriptoKit)
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import CryptoKit
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#elseif canImport(Crypto)
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import Crypto
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#else
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import CommonCrypto
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#endif
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import struct Foundation.Data
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import struct Foundation.TimeInterval
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/// A use case that generates a MD5 hash value, which is required to authenticate any request.
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struct GenerateHashUseCase {
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// MARK: Properties
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/// A private key.
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private let privateKey: String
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/// A public key.
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private let publicKey: String
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// MARK: Initializers
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/// Initializes this use case.
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/// - Parameters:
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/// - privateKey: A private key.
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/// - publicKey: A public key.
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init(
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privateKey: String,
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publicKey: String
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) {
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self.privateKey = privateKey
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self.publicKey = publicKey
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}
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// MARK: Functions
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/// Generates a MD5 hash value out of a given public key, private key and a timestamp.
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/// - Parameter timestamp: A timestamp that changes on a request-by-request basis.
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/// - Returns: A MD5 hash generated out of a private key, an public key, and a timestamp.
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func callAsFunction(
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timestamp: TimeInterval
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) -> String {
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let stringToHash = timestamp.asString + self.privateKey + self.publicKey
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let dataToHash = Data(stringToHash.utf8)
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#if canImport(CriptoKit) || canImport(Crypto)
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return Insecure.MD5
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.hash(data: dataToHash)
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.map { String(format: .Format.hexadecimal, $0) }
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.joined()
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#else
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return dataToHash
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.withUnsafeBytes {
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var hash = [UInt8](repeating: 0, count: Int(CC_MD5_DIGEST_LENGTH))
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CC_MD5($0.baseAddress, CC_LONG(dataToHash.count), &hash)
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return hash
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}
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.map { String(format: .Format.hexadecimal, $0) }
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.joined()
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#endif
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}
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}
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// MARK: - Constants
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private extension String {
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/// A namespace assigned to string format representations.
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enum Format {
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/// A string format for MD5 hash hexadecimal bytes.
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static let hexadecimal = "%02x"
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}
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}
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