diff options
Diffstat (limited to 'Crypto/src/asn1/x509/GeneralName.cs')
| -rw-r--r-- | Crypto/src/asn1/x509/GeneralName.cs | 418 |
1 files changed, 418 insertions, 0 deletions
diff --git a/Crypto/src/asn1/x509/GeneralName.cs b/Crypto/src/asn1/x509/GeneralName.cs new file mode 100644 index 000000000..710ddc922 --- /dev/null +++ b/Crypto/src/asn1/x509/GeneralName.cs @@ -0,0 +1,418 @@ +using System; +using System.Collections; +using System.Globalization; +using System.IO; +using System.Text; + +using NetUtils = Org.BouncyCastle.Utilities.Net; + +namespace Org.BouncyCastle.Asn1.X509 +{ + /** + * The GeneralName object. + * <pre> + * GeneralName ::= CHOICE { + * otherName [0] OtherName, + * rfc822Name [1] IA5String, + * dNSName [2] IA5String, + * x400Address [3] ORAddress, + * directoryName [4] Name, + * ediPartyName [5] EDIPartyName, + * uniformResourceIdentifier [6] IA5String, + * iPAddress [7] OCTET STRING, + * registeredID [8] OBJECT IDENTIFIER} + * + * OtherName ::= Sequence { + * type-id OBJECT IDENTIFIER, + * value [0] EXPLICIT ANY DEFINED BY type-id } + * + * EDIPartyName ::= Sequence { + * nameAssigner [0] DirectoryString OPTIONAL, + * partyName [1] DirectoryString } + * </pre> + */ + public class GeneralName + : Asn1Encodable, IAsn1Choice + { + public const int OtherName = 0; + public const int Rfc822Name = 1; + public const int DnsName = 2; + public const int X400Address = 3; + public const int DirectoryName = 4; + public const int EdiPartyName = 5; + public const int UniformResourceIdentifier = 6; + public const int IPAddress = 7; + public const int RegisteredID = 8; + + internal readonly Asn1Encodable obj; + internal readonly int tag; + + public GeneralName( + X509Name directoryName) + { + this.obj = directoryName; + this.tag = 4; + } + + /** + * When the subjectAltName extension contains an Internet mail address, + * the address MUST be included as an rfc822Name. The format of an + * rfc822Name is an "addr-spec" as defined in RFC 822 [RFC 822]. + * + * When the subjectAltName extension contains a domain name service + * label, the domain name MUST be stored in the dNSName (an IA5String). + * The name MUST be in the "preferred name syntax," as specified by RFC + * 1034 [RFC 1034]. + * + * When the subjectAltName extension contains a URI, the name MUST be + * stored in the uniformResourceIdentifier (an IA5String). The name MUST + * be a non-relative URL, and MUST follow the URL syntax and encoding + * rules specified in [RFC 1738]. The name must include both a scheme + * (e.g., "http" or "ftp") and a scheme-specific-part. The scheme- + * specific-part must include a fully qualified domain name or IP + * address as the host. + * + * When the subjectAltName extension contains a iPAddress, the address + * MUST be stored in the octet string in "network byte order," as + * specified in RFC 791 [RFC 791]. The least significant bit (LSB) of + * each octet is the LSB of the corresponding byte in the network + * address. For IP Version 4, as specified in RFC 791, the octet string + * MUST contain exactly four octets. For IP Version 6, as specified in + * RFC 1883, the octet string MUST contain exactly sixteen octets [RFC + * 1883]. + */ + public GeneralName( + Asn1Object name, + int tag) + { + this.obj = name; + this.tag = tag; + } + + public GeneralName( + int tag, + Asn1Encodable name) + { + this.obj = name; + this.tag = tag; + } + + /** + * Create a GeneralName for the given tag from the passed in string. + * <p> + * This constructor can handle: + * <ul> + * <li>rfc822Name</li> + * <li>iPAddress</li> + * <li>directoryName</li> + * <li>dNSName</li> + * <li>uniformResourceIdentifier</li> + * <li>registeredID</li> + * </ul> + * For x400Address, otherName and ediPartyName there is no common string + * format defined. + * </p><p> + * Note: A directory name can be encoded in different ways into a byte + * representation. Be aware of this if the byte representation is used for + * comparing results. + * </p> + * + * @param tag tag number + * @param name string representation of name + * @throws ArgumentException if the string encoding is not correct or + * not supported. + */ + public GeneralName( + int tag, + string name) + { + this.tag = tag; + + if (tag == Rfc822Name || tag == DnsName || tag == UniformResourceIdentifier) + { + this.obj = new DerIA5String(name); + } + else if (tag == RegisteredID) + { + this.obj = new DerObjectIdentifier(name); + } + else if (tag == DirectoryName) + { + this.obj = new X509Name(name); + } + else if (tag == IPAddress) + { + byte[] enc = toGeneralNameEncoding(name); + if (enc == null) + throw new ArgumentException("IP Address is invalid", "name"); + + this.obj = new DerOctetString(enc); + } + else + { + throw new ArgumentException("can't process string for tag: " + tag, "tag"); + } + } + + public static GeneralName GetInstance( + object obj) + { + if (obj == null || obj is GeneralName) + { + return (GeneralName) obj; + } + + if (obj is Asn1TaggedObject) + { + Asn1TaggedObject tagObj = (Asn1TaggedObject) obj; + int tag = tagObj.TagNo; + + switch (tag) + { + case OtherName: + return new GeneralName(tag, Asn1Sequence.GetInstance(tagObj, false)); + case Rfc822Name: + return new GeneralName(tag, DerIA5String.GetInstance(tagObj, false)); + case DnsName: + return new GeneralName(tag, DerIA5String.GetInstance(tagObj, false)); + case X400Address: + throw new ArgumentException("unknown tag: " + tag); + case DirectoryName: + return new GeneralName(tag, X509Name.GetInstance(tagObj, true)); + case EdiPartyName: + return new GeneralName(tag, Asn1Sequence.GetInstance(tagObj, false)); + case UniformResourceIdentifier: + return new GeneralName(tag, DerIA5String.GetInstance(tagObj, false)); + case IPAddress: + return new GeneralName(tag, Asn1OctetString.GetInstance(tagObj, false)); + case RegisteredID: + return new GeneralName(tag, DerObjectIdentifier.GetInstance(tagObj, false)); + } + } + + if (obj is byte[]) + { + try + { + return GetInstance(Asn1Object.FromByteArray((byte[])obj)); + } + catch (IOException) + { + throw new ArgumentException("unable to parse encoded general name"); + } + } + + throw new ArgumentException("unknown object in GetInstance: " + obj.GetType().FullName, "obj"); + } + + public static GeneralName GetInstance( + Asn1TaggedObject tagObj, + bool explicitly) + { + return GetInstance(Asn1TaggedObject.GetInstance(tagObj, true)); + } + + public int TagNo + { + get { return tag; } + } + + public Asn1Encodable Name + { + get { return obj; } + } + + public override string ToString() + { + StringBuilder buf = new StringBuilder(); + buf.Append(tag); + buf.Append(": "); + + switch (tag) + { + case Rfc822Name: + case DnsName: + case UniformResourceIdentifier: + buf.Append(DerIA5String.GetInstance(obj).GetString()); + break; + case DirectoryName: + buf.Append(X509Name.GetInstance(obj).ToString()); + break; + default: + buf.Append(obj.ToString()); + break; + } + + return buf.ToString(); + } + + private byte[] toGeneralNameEncoding( + string ip) + { + if (NetUtils.IPAddress.IsValidIPv6WithNetmask(ip) || NetUtils.IPAddress.IsValidIPv6(ip)) + { + int slashIndex = ip.IndexOf('/'); + + if (slashIndex < 0) + { + byte[] addr = new byte[16]; + int[] parsedIp = parseIPv6(ip); + copyInts(parsedIp, addr, 0); + + return addr; + } + else + { + byte[] addr = new byte[32]; + int[] parsedIp = parseIPv6(ip.Substring(0, slashIndex)); + copyInts(parsedIp, addr, 0); + string mask = ip.Substring(slashIndex + 1); + if (mask.IndexOf(':') > 0) + { + parsedIp = parseIPv6(mask); + } + else + { + parsedIp = parseMask(mask); + } + copyInts(parsedIp, addr, 16); + + return addr; + } + } + else if (NetUtils.IPAddress.IsValidIPv4WithNetmask(ip) || NetUtils.IPAddress.IsValidIPv4(ip)) + { + int slashIndex = ip.IndexOf('/'); + + if (slashIndex < 0) + { + byte[] addr = new byte[4]; + + parseIPv4(ip, addr, 0); + + return addr; + } + else + { + byte[] addr = new byte[8]; + + parseIPv4(ip.Substring(0, slashIndex), addr, 0); + + string mask = ip.Substring(slashIndex + 1); + if (mask.IndexOf('.') > 0) + { + parseIPv4(mask, addr, 4); + } + else + { + parseIPv4Mask(mask, addr, 4); + } + + return addr; + } + } + + return null; + } + + private void parseIPv4Mask(string mask, byte[] addr, int offset) + { + int maskVal = Int32.Parse(mask); + + for (int i = 0; i != maskVal; i++) + { + addr[(i / 8) + offset] |= (byte)(1 << (i % 8)); + } + } + + private void parseIPv4(string ip, byte[] addr, int offset) + { + foreach (string token in ip.Split('.', '/')) + { + addr[offset++] = (byte)Int32.Parse(token); + } + } + + private int[] parseMask(string mask) + { + int[] res = new int[8]; + int maskVal = Int32.Parse(mask); + + for (int i = 0; i != maskVal; i++) + { + res[i / 16] |= 1 << (i % 16); + } + return res; + } + + private void copyInts(int[] parsedIp, byte[] addr, int offSet) + { + for (int i = 0; i != parsedIp.Length; i++) + { + addr[(i * 2) + offSet] = (byte)(parsedIp[i] >> 8); + addr[(i * 2 + 1) + offSet] = (byte)parsedIp[i]; + } + } + + private int[] parseIPv6(string ip) + { + if (ip.StartsWith("::")) + { + ip = ip.Substring(1); + } + else if (ip.EndsWith("::")) + { + ip = ip.Substring(0, ip.Length - 1); + } + + IEnumerator sEnum = ip.Split(':').GetEnumerator(); + + int index = 0; + int[] val = new int[8]; + + int doubleColon = -1; + + while (sEnum.MoveNext()) + { + string e = (string) sEnum.Current; + + if (e.Length == 0) + { + doubleColon = index; + val[index++] = 0; + } + else + { + if (e.IndexOf('.') < 0) + { + val[index++] = Int32.Parse(e, NumberStyles.AllowHexSpecifier); + } + else + { + string[] tokens = e.Split('.'); + + val[index++] = (Int32.Parse(tokens[0]) << 8) | Int32.Parse(tokens[1]); + val[index++] = (Int32.Parse(tokens[2]) << 8) | Int32.Parse(tokens[3]); + } + } + } + + if (index != val.Length) + { + Array.Copy(val, doubleColon, val, val.Length - (index - doubleColon), index - doubleColon); + for (int i = doubleColon; i != val.Length - (index - doubleColon); i++) + { + val[i] = 0; + } + } + + return val; + } + + public override Asn1Object ToAsn1Object() + { + // Explicitly tagged if DirectoryName + return new DerTaggedObject(tag == DirectoryName, tag, obj); + } + } +} |