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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,57 @@ | ||
| // | ||
| // Data+Base64URL.swift | ||
| // MinterWallet | ||
| // | ||
| // Created by Alexey Sidorov on 11.03.2020. | ||
| // Copyright © 2020 Minter. All rights reserved. | ||
| // | ||
|
|
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| import Foundation | ||
|
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| /// Extension for making base64 representations of `Data` safe for | ||
| /// transmitting via URL query parameters | ||
| extension Data { | ||
|
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| /// Instantiates data by decoding a base64url string into base64 | ||
| /// | ||
| /// - Parameter string: A base64url encoded string | ||
| init?(base64URLEncoded string: String) { | ||
| self.init(base64Encoded: string.toggleBase64URLSafe(on: false)) | ||
| } | ||
|
|
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| /// Encodes the string into a base64url safe representation | ||
| /// | ||
| /// - Returns: A string that is base64 encoded but made safe for passing | ||
| /// in as a query parameter into a URL string | ||
| func base64URLEncodedString() -> String { | ||
| return self.base64EncodedString().toggleBase64URLSafe(on: true) | ||
| } | ||
|
|
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| } | ||
|
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| extension String { | ||
|
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| /// Encodes or decodes into a base64url safe representation | ||
| /// | ||
| /// - Parameter on: Whether or not the string should be made safe for URL strings | ||
| /// - Returns: if `on`, then a base64url string; if `off` then a base64 string | ||
| func toggleBase64URLSafe(on: Bool) -> String { | ||
| if on { | ||
| // Make base64 string safe for passing into URL query params | ||
| let base64url = self.replacingOccurrences(of: "/", with: "_") | ||
| .replacingOccurrences(of: "+", with: "-") | ||
| .replacingOccurrences(of: "=", with: "") | ||
| return base64url | ||
| } else { | ||
| // Return to base64 encoding | ||
| var base64 = self.replacingOccurrences(of: "_", with: "/") | ||
| .replacingOccurrences(of: "-", with: "+") | ||
| // Add any necessary padding with `=` | ||
| if base64.count % 4 != 0 { | ||
| base64.append(String(repeating: "=", count: 4 - base64.count % 4)) | ||
| } | ||
| return base64 | ||
| } | ||
| } | ||
|
|
||
| } |
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