diff options
Diffstat (limited to 'crypto/src/asn1/DerGeneralizedTime.cs')
| -rw-r--r-- | crypto/src/asn1/DerGeneralizedTime.cs | 350 |
1 files changed, 8 insertions, 342 deletions
diff --git a/crypto/src/asn1/DerGeneralizedTime.cs b/crypto/src/asn1/DerGeneralizedTime.cs index 898a3d585..0386ecb02 100644 --- a/crypto/src/asn1/DerGeneralizedTime.cs +++ b/crypto/src/asn1/DerGeneralizedTime.cs @@ -1,367 +1,33 @@ using System; -using System.Globalization; -using System.IO; -using System.Text; - -using Org.BouncyCastle.Utilities; namespace Org.BouncyCastle.Asn1 { - /** - * Generalized time object. - */ public class DerGeneralizedTime - : Asn1Object + : Asn1GeneralizedTime { - internal class Meta : Asn1UniversalType - { - internal static readonly Asn1UniversalType Instance = new Meta(); - - private Meta() : base(typeof(DerGeneralizedTime), Asn1Tags.GeneralizedTime) {} - - internal override Asn1Object FromImplicitPrimitive(DerOctetString octetString) - { - return CreatePrimitive(octetString.GetOctets()); - } - } - - /** - * return a generalized time from the passed in object - * - * @exception ArgumentException if the object cannot be converted. - */ - public static DerGeneralizedTime GetInstance(object obj) - { - if (obj == null || obj is DerGeneralizedTime) - { - return (DerGeneralizedTime)obj; - } - else if (obj is IAsn1Convertible) - { - Asn1Object asn1Object = ((IAsn1Convertible)obj).ToAsn1Object(); - if (asn1Object is DerGeneralizedTime) - return (DerGeneralizedTime)asn1Object; - } - else if (obj is byte[]) - { - try - { - return (DerGeneralizedTime)Meta.Instance.FromByteArray((byte[])obj); - } - catch (IOException e) - { - throw new ArgumentException("failed to construct generalized time from byte[]: " + e.Message); - } - } - - throw new ArgumentException("illegal object in GetInstance: " + Platform.GetTypeName(obj), "obj"); - } - - /** - * return a generalized Time object from a tagged object. - * - * @param taggedObject the tagged object holding the object we want - * @param declaredExplicit true if the object is meant to be explicitly tagged false otherwise. - * @exception ArgumentException if the tagged object cannot be converted. - */ - public static DerGeneralizedTime GetInstance(Asn1TaggedObject taggedObject, bool declaredExplicit) + public DerGeneralizedTime(byte[] time) + : base(time) { - return (DerGeneralizedTime)Meta.Instance.GetContextInstance(taggedObject, declaredExplicit); } - private readonly string time; - - /** - * The correct format for this is YYYYMMDDHHMMSS[.f]Z, or without the Z - * for local time, or Z+-HHMM on the end, for difference between local - * time and UTC time. The fractional second amount f must consist of at - * least one number with trailing zeroes removed. - * - * @param time the time string. - * @exception ArgumentException if string is an illegal format. - */ - public DerGeneralizedTime( - string time) - { - this.time = time; - - try - { - ToDateTime(); - } - catch (FormatException e) - { - throw new ArgumentException("invalid date string: " + e.Message); - } - } - - /** - * base constructor from a local time object - */ public DerGeneralizedTime(DateTime time) + : base(time) { - this.time = time.ToUniversalTime().ToString(@"yyyyMMddHHmmss\Z"); - } - - internal DerGeneralizedTime( - byte[] bytes) - { - // - // explicitly convert to characters - // - this.time = Strings.FromAsciiByteArray(bytes); } - /** - * Return the time. - * @return The time string as it appeared in the encoded object. - */ - public string TimeString + public DerGeneralizedTime(string time) + : base(time) { - get { return time; } - } - - /** - * return the time - always in the form of - * YYYYMMDDhhmmssGMT(+hh:mm|-hh:mm). - * <p> - * Normally in a certificate we would expect "Z" rather than "GMT", - * however adding the "GMT" means we can just use: - * <pre> - * dateF = new SimpleDateFormat("yyyyMMddHHmmssz"); - * </pre> - * To read in the time and Get a date which is compatible with our local - * time zone.</p> - */ - public string GetTime() - { - // - // standardise the format. - // - if (time[time.Length - 1] == 'Z') - return time.Substring(0, time.Length - 1) + "GMT+00:00"; - - int signPos = time.Length - 5; - char sign = time[signPos]; - if (sign == '-' || sign == '+') - { - return time.Substring(0, signPos) - + "GMT" - + time.Substring(signPos, 3) - + ":" - + time.Substring(signPos + 3); - } - else - { - signPos = time.Length - 3; - sign = time[signPos]; - if (sign == '-' || sign == '+') - { - return time.Substring(0, signPos) - + "GMT" - + time.Substring(signPos) - + ":00"; - } - } - - return time + CalculateGmtOffset(); - } - - private string CalculateGmtOffset() - { - char sign = '+'; - DateTime time = ToDateTime(); - - TimeSpan offset = TimeZoneInfo.Local.GetUtcOffset(time); - if (offset.CompareTo(TimeSpan.Zero) < 0) - { - sign = '-'; - offset = offset.Duration(); - } - int hours = offset.Hours; - int minutes = offset.Minutes; - - return "GMT" + sign + Convert(hours) + ":" + Convert(minutes); - } - - private static string Convert( - int time) - { - if (time < 10) - { - return "0" + time; - } - - return time.ToString(); - } - - public DateTime ToDateTime() - { - string formatStr; - string d = time; - bool makeUniversal = false; - - if (Platform.EndsWith(d, "Z")) - { - if (HasFractionalSeconds) - { - int fCount = d.Length - d.IndexOf('.') - 2; - formatStr = @"yyyyMMddHHmmss." + FString(fCount) + @"\Z"; - } - else if (HasSeconds) - { - formatStr = @"yyyyMMddHHmmss\Z"; - } - else if (HasMinutes) - { - formatStr = @"yyyyMMddHHmm\Z"; - } - else - { - formatStr = @"yyyyMMddHH\Z"; - } - } - else if (time.IndexOf('-') > 0 || time.IndexOf('+') > 0) - { - d = GetTime(); - makeUniversal = true; - - if (HasFractionalSeconds) - { - int fCount = Platform.IndexOf(d, "GMT") - 1 - d.IndexOf('.'); - formatStr = @"yyyyMMddHHmmss." + FString(fCount) + @"'GMT'zzz"; - } - else - { - formatStr = @"yyyyMMddHHmmss'GMT'zzz"; - } - } - else - { - if (HasFractionalSeconds) - { - int fCount = d.Length - 1 - d.IndexOf('.'); - formatStr = @"yyyyMMddHHmmss." + FString(fCount); - } - else if (HasSeconds) - { - formatStr = @"yyyyMMddHHmmss"; - } - else if (HasMinutes) - { - formatStr = @"yyyyMMddHHmm"; - } - else - { - formatStr = @"yyyyMMddHH"; - } - - // TODO? -// dateF.setTimeZone(new SimpleTimeZone(0, TimeZone.getDefault().getID())); - } - - return ParseDateString(d, formatStr, makeUniversal); - } - - private string FString( - int count) - { - StringBuilder sb = new StringBuilder(); - for (int i = 0; i < count; ++i) - { - sb.Append('f'); - } - return sb.ToString(); - } - - private DateTime ParseDateString(string s, string format, bool makeUniversal) - { - /* - * NOTE: DateTime.Kind and DateTimeStyles.AssumeUniversal not available in .NET 1.1 - */ - DateTimeStyles style = DateTimeStyles.None; - if (Platform.EndsWith(format, "Z")) - { - style |= DateTimeStyles.AdjustToUniversal; - style |= DateTimeStyles.AssumeUniversal; - } - - DateTime dt = DateTime.ParseExact(s, format, DateTimeFormatInfo.InvariantInfo, style); - - return makeUniversal ? dt.ToUniversalTime() : dt; - } - - private bool HasFractionalSeconds - { - get { return time.IndexOf('.') == 14; } - } - - private bool HasSeconds => IsDigit(12) && IsDigit(13); - - private bool HasMinutes => IsDigit(10) && IsDigit(11); - - private bool IsDigit(int pos) - { - return time.Length > pos && char.IsDigit(time[pos]); - } - - private byte[] GetOctets(int encoding) - { - if (Asn1OutputStream.EncodingDer == encoding && time[time.Length - 1] == 'Z') - { - if (!HasMinutes) - return Strings.ToAsciiByteArray(time.Insert(time.Length - 1, "0000")); - if (!HasSeconds) - return Strings.ToAsciiByteArray(time.Insert(time.Length - 1, "00")); - - if (HasFractionalSeconds) - { - int ind = time.Length - 2; - while (ind > 0 && time[ind] == '0') - { - --ind; - } - - if (time[ind] != '.') - { - ++ind; - } - - if (ind != time.Length - 1) - { - return Strings.ToAsciiByteArray(time.Remove(ind, time.Length - 1 - ind)); - } - } - } - - return Strings.ToAsciiByteArray(time); } internal override IAsn1Encoding GetEncoding(int encoding) { - return new PrimitiveEncoding(Asn1Tags.Universal, Asn1Tags.GeneralizedTime, GetOctets(encoding)); + return new PrimitiveEncoding(Asn1Tags.Universal, Asn1Tags.GeneralizedTime, GetDerTime()); } internal override IAsn1Encoding GetEncodingImplicit(int encoding, int tagClass, int tagNo) { - return new PrimitiveEncoding(tagClass, tagNo, GetOctets(encoding)); - } - - protected override bool Asn1Equals(Asn1Object asn1Object) - { - DerGeneralizedTime that = asn1Object as DerGeneralizedTime; - return null != that - && this.time.Equals(that.time); - } - - protected override int Asn1GetHashCode() - { - return time.GetHashCode(); - } - - internal static DerGeneralizedTime CreatePrimitive(byte[] contents) - { - return new DerGeneralizedTime(contents); + return new PrimitiveEncoding(tagClass, tagNo, GetDerTime()); } } } |