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Moved things around so relevant components are easier to locate
Some minor function renaming
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,24 @@ | ||
| // | ||
| // Data+additions.swift | ||
| // Outset | ||
| // | ||
| // Created by Bart E Reardon on 5/9/2023. | ||
| // | ||
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|
||
| import Foundation | ||
| import CommonCrypto | ||
|
|
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| extension Data { | ||
| // extension to the Data class that lets us compute sha256 | ||
| func sha256() -> Data { | ||
| var hash = [UInt8](repeating: 0, count: Int(CC_SHA256_DIGEST_LENGTH)) | ||
| self.withUnsafeBytes { | ||
| _ = CC_SHA256($0.baseAddress, CC_LONG(count), &hash) | ||
| } | ||
| return Data(hash) | ||
| } | ||
|
|
||
| func hexEncodedString() -> String { | ||
| return map { String(format: "%02hhx", $0) }.joined() | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,21 @@ | ||
| // | ||
| // String+additions.swift | ||
| // Outset | ||
| // | ||
| // Created by Bart E Reardon on 5/9/2023. | ||
| // | ||
|
|
||
| import Foundation | ||
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| extension String { | ||
| func camelCaseToUnderscored() -> String { | ||
| let regex = try? NSRegularExpression(pattern: "([a-z])([A-Z])", options: []) | ||
| let range = NSRange(location: 0, length: utf16.count) | ||
| return regex?.stringByReplacingMatches(in: self, options: [], range: range, withTemplate: "$1_$2").lowercased() ?? self | ||
| } | ||
| } | ||
|
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| func getValueForKey(_ key: String, inArray array: [String: String]) -> String? { | ||
| // short function that treats a [String: String] as a key value pair. | ||
| return array[key] | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,14 @@ | ||
| // | ||
| // URL+additions.swift | ||
| // Outset | ||
| // | ||
| // Created by Bart E Reardon on 5/9/2023. | ||
| // | ||
|
|
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| import Foundation | ||
|
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| extension URL { | ||
| var isDirectory: Bool { | ||
| (try? resourceValues(forKeys: [.isDirectoryKey]))?.isDirectory == true | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,100 @@ | ||
| // | ||
| // Checksum.swift | ||
| // Outset | ||
| // | ||
| // Created by Bart E Reardon on 5/9/2023. | ||
| // | ||
|
|
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| import Foundation | ||
|
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| struct FileHashes: Codable { | ||
| var sha256sum: [String: String] = [String: String]() | ||
| } | ||
|
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| func checksumLoadApprovedFiles() -> [String: String] { | ||
| // imports the list of file hashes that are approved to run | ||
| var outsetFileHashList = FileHashes() | ||
|
|
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| let defaults = UserDefaults.standard | ||
| let hashes = defaults.object(forKey: "sha256sum") | ||
|
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| if let data = hashes as? [String: String] { | ||
| for (key, value) in data { | ||
| outsetFileHashList.sha256sum[key] = value | ||
| } | ||
| } | ||
|
|
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| return outsetFileHashList.sha256sum | ||
| } | ||
|
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| func verifySHASUMForFile(filename: String, shasumArray: [String: String]) -> Bool { | ||
| // Verify that the file | ||
| var proceed = false | ||
| let errorMessage = "no required hash or file hash mismatch for: \(filename). Skipping" | ||
| writeLog("checking hash for \(filename)", logLevel: .debug) | ||
| let url = URL(fileURLWithPath: filename) | ||
| if let fileHash = sha256(for: url) { | ||
| writeLog("file hash : \(fileHash)", logLevel: .debug) | ||
| if let storedHash = getValueForKey(filename, inArray: shasumArray) { | ||
| writeLog("required hash : \(storedHash)", logLevel: .debug) | ||
| if storedHash == fileHash { | ||
| proceed = true | ||
| } | ||
| } | ||
| } | ||
| if !proceed { | ||
| writeLog(errorMessage, logLevel: .error) | ||
| } | ||
|
|
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| return proceed | ||
| } | ||
|
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| func sha256(for url: URL) -> String? { | ||
| // computes a sha256sum for the specified file path and returns a string | ||
| do { | ||
| let fileData = try Data(contentsOf: url) | ||
| let sha256 = fileData.sha256() | ||
| return sha256.hexEncodedString() | ||
| } catch { | ||
| return nil | ||
| } | ||
| } | ||
|
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| func checksumAllFiles() { | ||
| // compute checksum (SHA256) for all files in the outset directory | ||
| // returns data in two formats to stdout: | ||
| // plaintext | ||
| // as plist format ready for import into an MDM or converting to a .mobileconfig | ||
|
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| let url = URL(fileURLWithPath: outsetDirectory) | ||
| writeLog("CHECKSUM", logLevel: .info) | ||
| var shasumPlist = FileHashes() | ||
| if let enumerator = FileManager.default.enumerator(at: url, includingPropertiesForKeys: [.isRegularFileKey], options: [.skipsHiddenFiles, .skipsPackageDescendants]) { | ||
| for case let fileURL as URL in enumerator { | ||
| do { | ||
| let fileAttributes = try fileURL.resourceValues(forKeys: [.isRegularFileKey]) | ||
| if fileAttributes.isRegularFile! && fileURL.pathExtension != "plist" && fileURL.lastPathComponent != "outset" { | ||
| if let shasum = sha256(for: fileURL) { | ||
| print("\(fileURL.relativePath) : \(shasum)") | ||
| shasumPlist.sha256sum[fileURL.relativePath] = shasum | ||
| } | ||
| } | ||
| } catch { print(error, fileURL) } | ||
| } | ||
|
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| writeLog("PLIST", logLevel: .info) | ||
| let encoder = PropertyListEncoder() | ||
| encoder.outputFormat = .xml | ||
| do { | ||
| let data = try encoder.encode(shasumPlist) | ||
| if let plist = try PropertyListSerialization.propertyList(from: data, options: [], format: nil) as? [String: Any] { | ||
| let formatted = try PropertyListSerialization.data(fromPropertyList: plist, format: .xml, options: 0) | ||
| if let string = String(data: formatted, encoding: .utf8) { | ||
| print(string) | ||
| } | ||
| } | ||
| } catch { | ||
| writeLog("plist encoding failed", logLevel: .error) | ||
| } | ||
| } | ||
| } |
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