using System; using System.Collections.Generic; using System.Globalization; using System.Text; namespace Azure.Storage.Sas { internal static class SasExtensions { private const string NoneName = null; private const string HttpsName = "https"; private const string HttpsAndHttpName = "https,http"; private const string HttpAndHttpsName = "http,https"; internal static string ToPermissionsString(this AccountSasResourceTypes resourceTypes) { StringBuilder stringBuilder = new StringBuilder(); if ((resourceTypes & AccountSasResourceTypes.Service) == AccountSasResourceTypes.Service) stringBuilder.Append('s'); if ((resourceTypes & AccountSasResourceTypes.Container) == AccountSasResourceTypes.Container) stringBuilder.Append('c'); if ((resourceTypes & AccountSasResourceTypes.Object) == AccountSasResourceTypes.Object) stringBuilder.Append('o'); return stringBuilder.ToString(); } internal static AccountSasResourceTypes ParseResourceTypes(string s) { AccountSasResourceTypes accountSasResourceTypes = (AccountSasResourceTypes)0; foreach (char c in s) { AccountSasResourceTypes accountSasResourceTypes2 = accountSasResourceTypes; AccountSasResourceTypes accountSasResourceTypes3; switch (c) { case 's': accountSasResourceTypes3 = AccountSasResourceTypes.Service; break; case 'c': accountSasResourceTypes3 = AccountSasResourceTypes.Container; break; case 'o': accountSasResourceTypes3 = AccountSasResourceTypes.Object; break; default: throw Errors.InvalidResourceType(c); } accountSasResourceTypes = (accountSasResourceTypes2 | accountSasResourceTypes3); } return accountSasResourceTypes; } internal static string ToProtocolString(this SasProtocol protocol) { switch (protocol) { case SasProtocol.Https: return "https"; case SasProtocol.HttpsAndHttp: return "https,http"; default: return null; } } public static SasProtocol ParseProtocol(string s) { if (s == null || (s != null && s.Length == 0)) return SasProtocol.None; if (s == "https") return SasProtocol.Https; if (s == "https,http" || s == "http,https") return SasProtocol.HttpsAndHttp; throw Errors.InvalidSasProtocol("s", "SasProtocol"); } internal static string ToPermissionsString(this AccountSasServices services) { StringBuilder stringBuilder = new StringBuilder(); if ((services & AccountSasServices.Blobs) == AccountSasServices.Blobs) stringBuilder.Append('b'); if ((services & AccountSasServices.Files) == AccountSasServices.Files) stringBuilder.Append('f'); if ((services & AccountSasServices.Queues) == AccountSasServices.Queues) stringBuilder.Append('q'); if ((services & AccountSasServices.Tables) == AccountSasServices.Tables) stringBuilder.Append('t'); return stringBuilder.ToString(); } internal static AccountSasServices ParseAccountServices(string s) { AccountSasServices accountSasServices = (AccountSasServices)0; foreach (char c in s) { AccountSasServices accountSasServices2 = accountSasServices; AccountSasServices accountSasServices3; switch (c) { case 'b': accountSasServices3 = AccountSasServices.Blobs; break; case 'q': accountSasServices3 = AccountSasServices.Queues; break; case 'f': accountSasServices3 = AccountSasServices.Files; break; case 't': accountSasServices3 = AccountSasServices.Tables; break; default: throw Errors.InvalidService(c); } accountSasServices = (accountSasServices2 | accountSasServices3); } return accountSasServices; } internal static string FormatTimesForSasSigning(DateTimeOffset time) { if (!(time == default(DateTimeOffset))) return time.ToString("yyyy-MM-ddTHH:mm:ssZ", CultureInfo.InvariantCulture); return ""; } internal static void AddToBuilder(StringBuilder sb, string key, string value) { sb.Append((sb.Length > 0) ? "&" : "").Append(key).Append('=') .Append(value); } internal static string ValidateAndSanitizeRawPermissions(string permissions, List<char> validPermissionsInOrder) { if (permissions == null) return null; permissions = permissions.ToLowerInvariant(); HashSet<char> hashSet = new HashSet<char>(validPermissionsInOrder); HashSet<char> hashSet2 = new HashSet<char>(); string text = permissions; foreach (char c in text) { if (!hashSet.Contains(c)) throw new ArgumentException($"{c}"""); hashSet2.Add(c); } StringBuilder stringBuilder = new StringBuilder(); foreach (char item in validPermissionsInOrder) { if (hashSet2.Contains(item)) stringBuilder.Append(item); } return stringBuilder.ToString(); } } }