1 files changed, 145 insertions, 0 deletions
diff --git a/Crypto/src/asn1/DerIA5String.cs b/Crypto/src/asn1/DerIA5String.cs
new file mode 100644
index 000000000..9fa2cba3c
--- /dev/null
+++ b/Crypto/src/asn1/DerIA5String.cs
@@ -0,0 +1,145 @@
+using System;
+using System.Text;
+
+using Org.BouncyCastle.Utilities;
+
+namespace Org.BouncyCastle.Asn1
+{
+ /**
+ * Der IA5String object - this is an ascii string.
+ */
+ public class DerIA5String
+ : DerStringBase
+ {
+ private readonly string str;
+
+ /**
+ * return a IA5 string from the passed in object
+ *
+ * @exception ArgumentException if the object cannot be converted.
+ */
+ public static DerIA5String GetInstance(
+ object obj)
+ {
+ if (obj == null || obj is DerIA5String)
+ {
+ return (DerIA5String)obj;
+ }
+
+ throw new ArgumentException("illegal object in GetInstance: " + obj.GetType().Name);
+ }
+
+ /**
+ * return an IA5 string from a tagged object.
+ *
+ * @param obj the tagged object holding the object we want
+ * @param explicitly true if the object is meant to be explicitly
+ * tagged false otherwise.
+ * @exception ArgumentException if the tagged object cannot
+ * be converted.
+ */
+ public static DerIA5String GetInstance(
+ Asn1TaggedObject obj,
+ bool isExplicit)
+ {
+ Asn1Object o = obj.GetObject();
+
+ if (isExplicit || o is DerIA5String)
+ {
+ return GetInstance(o);
+ }
+
+ return new DerIA5String(((Asn1OctetString)o).GetOctets());
+ }
+
+ /**
+ * basic constructor - with bytes.
+ */
+ public DerIA5String(
+ byte[] str)
+ : this(Strings.FromAsciiByteArray(str), false)
+ {
+ }
+
+ /**
+ * basic constructor - without validation.
+ */
+ public DerIA5String(
+ string str)
+ : this(str, false)
+ {
+ }
+
+ /**
+ * Constructor with optional validation.
+ *
+ * @param string the base string to wrap.
+ * @param validate whether or not to check the string.
+ * @throws ArgumentException if validate is true and the string
+ * contains characters that should not be in an IA5String.
+ */
+ public DerIA5String(
+ string str,
+ bool validate)
+ {
+ if (str == null)
+ throw new ArgumentNullException("str");
+ if (validate && !IsIA5String(str))
+ throw new ArgumentException("string contains illegal characters", "str");
+
+ this.str = str;
+ }
+
+ public override string GetString()
+ {
+ return str;
+ }
+
+ public byte[] GetOctets()
+ {
+ return Strings.ToAsciiByteArray(str);
+ }
+
+ internal override void Encode(
+ DerOutputStream derOut)
+ {
+ derOut.WriteEncoded(Asn1Tags.IA5String, GetOctets());
+ }
+
+ protected override int Asn1GetHashCode()
+ {
+ return this.str.GetHashCode();
+ }
+
+ protected override bool Asn1Equals(
+ Asn1Object asn1Object)
+ {
+ DerIA5String other = asn1Object as DerIA5String;
+
+ if (other == null)
+ return false;
+
+ return this.str.Equals(other.str);
+ }
+
+ /**
+ * return true if the passed in String can be represented without
+ * loss as an IA5String, false otherwise.
+ *
+ * @return true if in printable set, false otherwise.
+ */
+ public static bool IsIA5String(
+ string str)
+ {
+ foreach (char ch in str)
+ {
+ if (ch > 0x007f)
+ {
+ return false;
+ }
+ }
+
+ return true;
+ }
+ }
+}
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